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/MonadicInvariant01.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-133090d [2018-10-04 09:52:21,120 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-04 09:52:21,122 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-04 09:52:21,133 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-04 09:52:21,134 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-04 09:52:21,135 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-04 09:52:21,136 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-04 09:52:21,137 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-04 09:52:21,139 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-04 09:52:21,140 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-04 09:52:21,141 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-04 09:52:21,141 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-04 09:52:21,142 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-04 09:52:21,143 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-04 09:52:21,144 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-04 09:52:21,145 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-04 09:52:21,146 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-04 09:52:21,147 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-04 09:52:21,149 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-04 09:52:21,151 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-04 09:52:21,152 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-04 09:52:21,153 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-04 09:52:21,156 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-04 09:52:21,165 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 [2018-10-04 09:52:21,182 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-04 09:52:21,182 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-04 09:52:21,183 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-04 09:52:21,183 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-04 09:52:21,184 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-04 09:52:21,184 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-04 09:52:21,184 INFO L133 SettingsManager]: * Use SBE=true [2018-10-04 09:52:21,184 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-04 09:52:21,185 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-04 09:52:21,185 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-04 09:52:21,185 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-04 09:52:21,185 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-04 09:52:21,185 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-04 09:52:21,185 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-04 09:52:21,186 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-04 09:52:21,186 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-04 09:52:21,186 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-04 09:52:21,186 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-04 09:52:21,186 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-04 09:52:21,187 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-04 09:52:21,187 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-04 09:52:21,187 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-04 09:52:21,187 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 09:52:21,187 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-04 09:52:21,188 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-04 09:52:21,188 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-04 09:52:21,188 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-04 09:52:21,188 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-04 09:52:21,188 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-04 09:52:21,189 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-04 09:52:21,189 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-10-04 09:52:21,231 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-04 09:52:21,245 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-04 09:52:21,253 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-04 09:52:21,255 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-04 09:52:21,256 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-04 09:52:21,256 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/MonadicInvariant01.bpl [2018-10-04 09:52:21,257 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/MonadicInvariant01.bpl' [2018-10-04 09:52:21,309 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-04 09:52:21,310 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-04 09:52:21,311 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-04 09:52:21,311 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-04 09:52:21,311 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-04 09:52:21,332 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:52:21" (1/1) ... [2018-10-04 09:52:21,345 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:52:21" (1/1) ... [2018-10-04 09:52:21,350 WARN L165 Inliner]: Program contained no entry procedure! [2018-10-04 09:52:21,350 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-10-04 09:52:21,350 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-10-04 09:52:21,352 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-04 09:52:21,353 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-04 09:52:21,353 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-04 09:52:21,354 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-04 09:52:21,365 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:52:21" (1/1) ... [2018-10-04 09:52:21,366 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:52:21" (1/1) ... [2018-10-04 09:52:21,366 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:52:21" (1/1) ... [2018-10-04 09:52:21,366 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:52:21" (1/1) ... [2018-10-04 09:52:21,368 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:52:21" (1/1) ... [2018-10-04 09:52:21,376 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:52:21" (1/1) ... [2018-10-04 09:52:21,377 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:52:21" (1/1) ... [2018-10-04 09:52:21,378 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-04 09:52:21,380 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-04 09:52:21,380 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-04 09:52:21,380 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-04 09:52:21,381 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:52:21" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 09:52:21,456 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-10-04 09:52:21,457 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-04 09:52:21,457 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-04 09:52:21,676 INFO L338 CfgBuilder]: Using library mode [2018-10-04 09:52:21,676 INFO L202 PluginConnector]: Adding new model MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 09:52:21 BoogieIcfgContainer [2018-10-04 09:52:21,677 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-04 09:52:21,680 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-04 09:52:21,680 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-04 09:52:21,684 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-04 09:52:21,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:52:21" (1/2) ... [2018-10-04 09:52:21,685 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40685104 and model type MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 09:52:21, skipping insertion in model container [2018-10-04 09:52:21,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 09:52:21" (2/2) ... [2018-10-04 09:52:21,691 INFO L112 eAbstractionObserver]: Analyzing ICFG MonadicInvariant01.bpl [2018-10-04 09:52:21,702 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-04 09:52:21,710 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-04 09:52:21,756 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-04 09:52:21,757 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-04 09:52:21,757 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-04 09:52:21,757 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-04 09:52:21,757 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-04 09:52:21,758 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-04 09:52:21,758 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-04 09:52:21,758 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-04 09:52:21,758 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-04 09:52:21,773 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-10-04 09:52:21,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-10-04 09:52:21,782 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:21,783 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-10-04 09:52:21,784 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:21,791 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:21,792 INFO L82 PathProgramCache]: Analyzing trace with hash 29920, now seen corresponding path program 1 times [2018-10-04 09:52:21,794 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:21,794 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:21,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:21,843 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:52:21,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:21,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:21,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:21,937 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 09:52:21,937 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-10-04 09:52:21,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-04 09:52:21,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-04 09:52:21,953 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:21,955 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-10-04 09:52:22,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:22,010 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-04 09:52:22,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-04 09:52:22,012 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-10-04 09:52:22,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:22,027 INFO L225 Difference]: With dead ends: 11 [2018-10-04 09:52:22,027 INFO L226 Difference]: Without dead ends: 6 [2018-10-04 09:52:22,031 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime 1 [2018-10-04 09:52:22,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-10-04 09:52:22,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-10-04 09:52:22,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-10-04 09:52:22,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-10-04 09:52:22,075 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 3 [2018-10-04 09:52:22,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:22,076 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-10-04 09:52:22,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-04 09:52:22,076 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-10-04 09:52:22,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-04 09:52:22,076 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:22,077 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-10-04 09:52:22,077 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:22,078 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:22,078 INFO L82 PathProgramCache]: Analyzing trace with hash 28754210, now seen corresponding path program 1 times [2018-10-04 09:52:22,078 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:22,079 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:22,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:22,080 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:52:22,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:22,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:22,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:22,198 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:22,198 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:52:22,215 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:52:22,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:22,258 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:22,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:22,373 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:22,373 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2018-10-04 09:52:22,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-04 09:52:22,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-04 09:52:22,375 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:22,375 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 6 states. [2018-10-04 09:52:22,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:22,428 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-10-04 09:52:22,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-04 09:52:22,429 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2018-10-04 09:52:22,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:22,429 INFO L225 Difference]: With dead ends: 9 [2018-10-04 09:52:22,430 INFO L226 Difference]: Without dead ends: 8 [2018-10-04 09:52:22,431 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 4 [2018-10-04 09:52:22,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-04 09:52:22,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-10-04 09:52:22,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-04 09:52:22,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-10-04 09:52:22,433 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 5 [2018-10-04 09:52:22,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:22,434 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-10-04 09:52:22,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-04 09:52:22,434 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-10-04 09:52:22,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-04 09:52:22,435 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:22,435 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1] [2018-10-04 09:52:22,435 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:22,435 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:22,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1862993124, now seen corresponding path program 2 times [2018-10-04 09:52:22,436 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:22,436 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:22,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:22,437 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:52:22,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:22,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:22,554 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:22,554 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:22,555 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:52:22,572 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:52:22,588 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:52:22,588 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:52:22,592 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:22,664 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:22,686 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:22,686 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2018-10-04 09:52:22,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 09:52:22,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 09:52:22,687 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:22,687 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 8 states. [2018-10-04 09:52:22,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:22,774 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-04 09:52:22,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 09:52:22,775 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2018-10-04 09:52:22,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:22,775 INFO L225 Difference]: With dead ends: 11 [2018-10-04 09:52:22,775 INFO L226 Difference]: Without dead ends: 10 [2018-10-04 09:52:22,776 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 5 [2018-10-04 09:52:22,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-04 09:52:22,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-04 09:52:22,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-04 09:52:22,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-10-04 09:52:22,779 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2018-10-04 09:52:22,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:22,780 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-10-04 09:52:22,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 09:52:22,780 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-10-04 09:52:22,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-04 09:52:22,781 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:22,781 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1] [2018-10-04 09:52:22,781 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:22,781 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:22,782 INFO L82 PathProgramCache]: Analyzing trace with hash -664969178, now seen corresponding path program 3 times [2018-10-04 09:52:22,782 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:22,782 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:22,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:22,783 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:52:22,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:22,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:23,059 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:23,060 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:23,060 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:52:23,072 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:52:23,099 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-04 09:52:23,099 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:52:23,100 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:23,215 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:23,235 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:23,235 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2018-10-04 09:52:23,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:52:23,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:52:23,236 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:23,236 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 10 states. [2018-10-04 09:52:23,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:23,282 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-10-04 09:52:23,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 09:52:23,282 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2018-10-04 09:52:23,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:23,283 INFO L225 Difference]: With dead ends: 13 [2018-10-04 09:52:23,283 INFO L226 Difference]: Without dead ends: 12 [2018-10-04 09:52:23,284 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.2s impTime 6 [2018-10-04 09:52:23,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-04 09:52:23,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-04 09:52:23,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-04 09:52:23,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-10-04 09:52:23,288 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2018-10-04 09:52:23,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:23,289 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-10-04 09:52:23,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:52:23,289 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-10-04 09:52:23,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-04 09:52:23,290 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:23,290 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1] [2018-10-04 09:52:23,290 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:23,290 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:23,291 INFO L82 PathProgramCache]: Analyzing trace with hash 914748136, now seen corresponding path program 4 times [2018-10-04 09:52:23,291 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:23,291 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:23,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:23,292 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:52:23,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:23,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:23,529 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:23,529 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:23,530 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:52:23,538 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:52:23,567 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:52:23,567 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:52:23,569 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:23,668 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:23,688 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:23,688 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2018-10-04 09:52:23,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-04 09:52:23,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-04 09:52:23,689 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:23,689 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 12 states. [2018-10-04 09:52:23,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:23,742 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-10-04 09:52:23,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 09:52:23,743 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2018-10-04 09:52:23,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:23,744 INFO L225 Difference]: With dead ends: 15 [2018-10-04 09:52:23,744 INFO L226 Difference]: Without dead ends: 14 [2018-10-04 09:52:23,744 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 7 [2018-10-04 09:52:23,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-04 09:52:23,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-04 09:52:23,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-04 09:52:23,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-04 09:52:23,748 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2018-10-04 09:52:23,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:23,749 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-04 09:52:23,749 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-04 09:52:23,749 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-04 09:52:23,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-04 09:52:23,750 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:23,750 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1] [2018-10-04 09:52:23,750 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:23,750 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:23,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1395335894, now seen corresponding path program 5 times [2018-10-04 09:52:23,751 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:23,751 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:23,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:23,752 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:52:23,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:23,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:23,981 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:23,982 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:23,982 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:52:24,000 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:52:24,090 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-04 09:52:24,090 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:52:24,092 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:24,384 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:24,404 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:24,405 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2018-10-04 09:52:24,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 09:52:24,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 09:52:24,405 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:24,406 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 14 states. [2018-10-04 09:52:24,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:24,502 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-04 09:52:24,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 09:52:24,502 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-10-04 09:52:24,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:24,503 INFO L225 Difference]: With dead ends: 17 [2018-10-04 09:52:24,503 INFO L226 Difference]: Without dead ends: 16 [2018-10-04 09:52:24,503 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.3s impTime 8 [2018-10-04 09:52:24,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-04 09:52:24,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-04 09:52:24,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-04 09:52:24,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-10-04 09:52:24,508 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2018-10-04 09:52:24,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:24,509 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-10-04 09:52:24,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 09:52:24,509 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-10-04 09:52:24,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:52:24,509 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:24,510 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1] [2018-10-04 09:52:24,510 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:24,510 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:24,510 INFO L82 PathProgramCache]: Analyzing trace with hash -887996692, now seen corresponding path program 6 times [2018-10-04 09:52:24,510 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:24,511 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:24,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:24,512 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:52:24,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:24,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:24,622 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:24,623 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:24,623 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:52:24,632 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:52:24,650 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-04 09:52:24,650 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:52:24,653 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:24,804 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:24,831 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:24,831 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2018-10-04 09:52:24,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-04 09:52:24,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-04 09:52:24,832 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:24,833 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 16 states. [2018-10-04 09:52:24,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:24,891 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-04 09:52:24,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:52:24,892 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 15 [2018-10-04 09:52:24,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:24,893 INFO L225 Difference]: With dead ends: 19 [2018-10-04 09:52:24,894 INFO L226 Difference]: Without dead ends: 18 [2018-10-04 09:52:24,894 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 9 [2018-10-04 09:52:24,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-04 09:52:24,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-04 09:52:24,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-04 09:52:24,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-04 09:52:24,898 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2018-10-04 09:52:24,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:24,898 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-04 09:52:24,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-04 09:52:24,899 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-04 09:52:24,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:52:24,899 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:24,900 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1] [2018-10-04 09:52:24,900 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:24,900 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:24,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1333671982, now seen corresponding path program 7 times [2018-10-04 09:52:24,900 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:24,900 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:24,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:24,901 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:52:24,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:24,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:25,041 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:25,042 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:25,042 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:52:25,050 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:52:25,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:25,058 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:25,335 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:25,357 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:25,357 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2018-10-04 09:52:25,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-04 09:52:25,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-04 09:52:25,358 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:25,358 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 18 states. [2018-10-04 09:52:25,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:25,440 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-04 09:52:25,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:52:25,441 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 17 [2018-10-04 09:52:25,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:25,442 INFO L225 Difference]: With dead ends: 21 [2018-10-04 09:52:25,442 INFO L226 Difference]: Without dead ends: 20 [2018-10-04 09:52:25,443 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.2s impTime 10 [2018-10-04 09:52:25,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-04 09:52:25,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-04 09:52:25,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-04 09:52:25,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-10-04 09:52:25,447 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2018-10-04 09:52:25,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:25,448 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-10-04 09:52:25,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-04 09:52:25,448 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-10-04 09:52:25,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:52:25,449 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:25,449 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1] [2018-10-04 09:52:25,449 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:25,449 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:25,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1758521584, now seen corresponding path program 8 times [2018-10-04 09:52:25,450 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:25,450 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:25,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:25,451 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:52:25,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:25,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:25,609 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:25,609 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:25,609 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:52:25,621 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:52:25,629 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:52:25,629 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:52:25,632 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:25,771 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:25,791 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:25,791 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2018-10-04 09:52:25,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 09:52:25,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 09:52:25,793 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:25,793 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 20 states. [2018-10-04 09:52:25,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:25,848 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-04 09:52:25,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:52:25,848 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 19 [2018-10-04 09:52:25,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:25,850 INFO L225 Difference]: With dead ends: 23 [2018-10-04 09:52:25,850 INFO L226 Difference]: Without dead ends: 22 [2018-10-04 09:52:25,850 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 11 [2018-10-04 09:52:25,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-04 09:52:25,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-04 09:52:25,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-04 09:52:25,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-10-04 09:52:25,855 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2018-10-04 09:52:25,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:25,855 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-10-04 09:52:25,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 09:52:25,855 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-10-04 09:52:25,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-04 09:52:25,856 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:25,856 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1] [2018-10-04 09:52:25,856 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:25,857 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:25,857 INFO L82 PathProgramCache]: Analyzing trace with hash 2017095986, now seen corresponding path program 9 times [2018-10-04 09:52:25,857 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:25,857 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:25,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:25,858 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:52:25,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:25,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:25,979 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:25,979 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:25,980 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:52:25,989 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:52:26,002 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-04 09:52:26,003 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:52:26,004 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:26,248 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:26,268 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:26,268 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2018-10-04 09:52:26,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-04 09:52:26,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-04 09:52:26,269 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:26,269 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 22 states. [2018-10-04 09:52:26,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:26,499 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-04 09:52:26,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-04 09:52:26,499 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2018-10-04 09:52:26,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:26,501 INFO L225 Difference]: With dead ends: 25 [2018-10-04 09:52:26,501 INFO L226 Difference]: Without dead ends: 24 [2018-10-04 09:52:26,501 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 12 [2018-10-04 09:52:26,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-04 09:52:26,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-04 09:52:26,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-04 09:52:26,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-10-04 09:52:26,506 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2018-10-04 09:52:26,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:26,506 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-10-04 09:52:26,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-04 09:52:26,506 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-10-04 09:52:26,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-04 09:52:26,507 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:26,507 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1] [2018-10-04 09:52:26,508 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:26,508 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:26,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1398993140, now seen corresponding path program 10 times [2018-10-04 09:52:26,508 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:26,508 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:26,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:26,509 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:52:26,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:26,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:26,708 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:26,708 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:26,708 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:52:26,716 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:52:26,731 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:52:26,731 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:52:26,733 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:26,892 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:26,914 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:26,915 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2018-10-04 09:52:26,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-04 09:52:26,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-04 09:52:26,916 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:26,916 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 24 states. [2018-10-04 09:52:26,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:26,977 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-04 09:52:26,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-04 09:52:26,978 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 23 [2018-10-04 09:52:26,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:26,979 INFO L225 Difference]: With dead ends: 27 [2018-10-04 09:52:26,979 INFO L226 Difference]: Without dead ends: 26 [2018-10-04 09:52:26,980 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 13 [2018-10-04 09:52:26,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-04 09:52:26,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-10-04 09:52:26,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-04 09:52:26,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-10-04 09:52:26,985 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 23 [2018-10-04 09:52:26,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:26,986 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-10-04 09:52:26,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-04 09:52:26,986 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-10-04 09:52:26,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-04 09:52:26,987 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:26,987 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1] [2018-10-04 09:52:26,988 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:26,988 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:26,988 INFO L82 PathProgramCache]: Analyzing trace with hash 107644982, now seen corresponding path program 11 times [2018-10-04 09:52:26,988 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:26,988 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:26,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:26,989 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:52:26,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:26,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:27,244 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:27,244 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:27,244 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:52:27,254 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:52:27,344 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-04 09:52:27,344 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:52:27,346 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:27,941 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:27,962 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:27,962 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2018-10-04 09:52:27,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-04 09:52:27,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-04 09:52:27,963 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:27,963 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 26 states. [2018-10-04 09:52:28,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:28,039 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-04 09:52:28,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-04 09:52:28,039 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 25 [2018-10-04 09:52:28,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:28,040 INFO L225 Difference]: With dead ends: 29 [2018-10-04 09:52:28,041 INFO L226 Difference]: Without dead ends: 28 [2018-10-04 09:52:28,041 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.5s impTime 14 [2018-10-04 09:52:28,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-04 09:52:28,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-10-04 09:52:28,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 09:52:28,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-10-04 09:52:28,047 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 25 [2018-10-04 09:52:28,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:28,047 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-10-04 09:52:28,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-04 09:52:28,047 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-10-04 09:52:28,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-04 09:52:28,048 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:28,048 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1] [2018-10-04 09:52:28,048 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:28,048 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:28,049 INFO L82 PathProgramCache]: Analyzing trace with hash 367613688, now seen corresponding path program 12 times [2018-10-04 09:52:28,049 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:28,049 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:28,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:28,050 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:52:28,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:28,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:28,328 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:28,328 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:28,329 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-10-04 09:52:28,344 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:52:28,393 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-04 09:52:28,394 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:52:28,395 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:28,596 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:28,617 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:28,617 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 26 [2018-10-04 09:52:28,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-04 09:52:28,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-04 09:52:28,618 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:28,618 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 28 states. [2018-10-04 09:52:28,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:28,736 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-04 09:52:28,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-04 09:52:28,737 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 27 [2018-10-04 09:52:28,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:28,737 INFO L225 Difference]: With dead ends: 31 [2018-10-04 09:52:28,738 INFO L226 Difference]: Without dead ends: 30 [2018-10-04 09:52:28,738 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.3s impTime 15 [2018-10-04 09:52:28,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-04 09:52:28,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-04 09:52:28,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:52:28,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-10-04 09:52:28,743 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 27 [2018-10-04 09:52:28,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:28,743 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-10-04 09:52:28,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-04 09:52:28,743 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-10-04 09:52:28,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-04 09:52:28,744 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:28,744 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1] [2018-10-04 09:52:28,744 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:28,744 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:28,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1089436986, now seen corresponding path program 13 times [2018-10-04 09:52:28,745 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:28,745 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:28,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:28,746 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:52:28,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:28,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:28,981 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:28,982 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:28,982 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:52:28,990 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:52:29,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:29,003 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:29,338 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:29,358 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:29,358 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2018-10-04 09:52:29,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-04 09:52:29,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-04 09:52:29,359 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:29,359 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 30 states. [2018-10-04 09:52:29,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:29,473 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-04 09:52:29,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-04 09:52:29,473 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 29 [2018-10-04 09:52:29,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:29,474 INFO L225 Difference]: With dead ends: 33 [2018-10-04 09:52:29,474 INFO L226 Difference]: Without dead ends: 32 [2018-10-04 09:52:29,475 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 16 [2018-10-04 09:52:29,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-04 09:52:29,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-10-04 09:52:29,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:52:29,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-10-04 09:52:29,480 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 29 [2018-10-04 09:52:29,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:29,480 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-10-04 09:52:29,480 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-04 09:52:29,480 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-10-04 09:52:29,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-04 09:52:29,481 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:29,481 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1] [2018-10-04 09:52:29,481 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:29,482 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:29,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1023075588, now seen corresponding path program 14 times [2018-10-04 09:52:29,482 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:29,482 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:29,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:29,483 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:52:29,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:29,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:29,710 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:29,710 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:29,711 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:52:29,723 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:52:29,741 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:52:29,741 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:52:29,744 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:30,188 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:30,208 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:30,208 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2018-10-04 09:52:30,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-04 09:52:30,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-04 09:52:30,210 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:30,210 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 32 states. [2018-10-04 09:52:30,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:30,334 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-10-04 09:52:30,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-04 09:52:30,335 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 31 [2018-10-04 09:52:30,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:30,336 INFO L225 Difference]: With dead ends: 35 [2018-10-04 09:52:30,336 INFO L226 Difference]: Without dead ends: 34 [2018-10-04 09:52:30,336 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.4s impTime 17 [2018-10-04 09:52:30,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-04 09:52:30,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-10-04 09:52:30,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:52:30,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-10-04 09:52:30,340 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 31 [2018-10-04 09:52:30,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:30,340 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-10-04 09:52:30,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-04 09:52:30,341 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-10-04 09:52:30,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-04 09:52:30,341 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:30,341 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1] [2018-10-04 09:52:30,342 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:30,342 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:30,342 INFO L82 PathProgramCache]: Analyzing trace with hash 371871806, now seen corresponding path program 15 times [2018-10-04 09:52:30,343 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:30,343 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:30,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:30,344 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:52:30,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:30,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:30,555 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:30,556 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:30,556 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:52:30,564 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:52:30,748 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-04 09:52:30,748 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:52:30,750 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:31,626 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:31,647 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:31,647 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 32 [2018-10-04 09:52:31,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-04 09:52:31,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-04 09:52:31,648 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:31,648 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 34 states. [2018-10-04 09:52:31,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:31,779 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-04 09:52:31,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-04 09:52:31,779 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 33 [2018-10-04 09:52:31,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:31,780 INFO L225 Difference]: With dead ends: 37 [2018-10-04 09:52:31,780 INFO L226 Difference]: Without dead ends: 36 [2018-10-04 09:52:31,781 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.6s impTime 18 [2018-10-04 09:52:31,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-04 09:52:31,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-10-04 09:52:31,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-04 09:52:31,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-10-04 09:52:31,787 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 33 [2018-10-04 09:52:31,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:31,787 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-10-04 09:52:31,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-04 09:52:31,788 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-10-04 09:52:31,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-04 09:52:31,788 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:31,789 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1] [2018-10-04 09:52:31,789 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:31,789 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:31,789 INFO L82 PathProgramCache]: Analyzing trace with hash 886521088, now seen corresponding path program 16 times [2018-10-04 09:52:31,789 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:31,790 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:31,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:31,790 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:52:31,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:31,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:31,984 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:31,984 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:31,984 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:52:31,992 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:52:32,006 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:52:32,006 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:52:32,008 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:32,267 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:32,289 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:32,289 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 34 [2018-10-04 09:52:32,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-04 09:52:32,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-04 09:52:32,290 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:32,290 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 36 states. [2018-10-04 09:52:32,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:32,430 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-04 09:52:32,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-04 09:52:32,431 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 35 [2018-10-04 09:52:32,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:32,431 INFO L225 Difference]: With dead ends: 39 [2018-10-04 09:52:32,431 INFO L226 Difference]: Without dead ends: 38 [2018-10-04 09:52:32,432 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 19 [2018-10-04 09:52:32,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-04 09:52:32,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-10-04 09:52:32,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-04 09:52:32,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-10-04 09:52:32,436 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 35 [2018-10-04 09:52:32,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:32,437 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-10-04 09:52:32,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-04 09:52:32,437 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-10-04 09:52:32,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-04 09:52:32,438 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:32,438 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1] [2018-10-04 09:52:32,438 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:32,438 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:32,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1543242050, now seen corresponding path program 17 times [2018-10-04 09:52:32,439 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:32,439 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:32,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:32,440 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:52:32,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:32,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:32,774 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:32,775 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:32,775 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:52:32,785 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:52:32,860 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-04 09:52:32,860 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:52:32,863 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:33,236 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:33,257 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:33,257 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 36 [2018-10-04 09:52:33,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-04 09:52:33,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-04 09:52:33,258 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:33,258 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 38 states. [2018-10-04 09:52:33,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:33,450 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-10-04 09:52:33,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-04 09:52:33,451 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 37 [2018-10-04 09:52:33,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:33,451 INFO L225 Difference]: With dead ends: 41 [2018-10-04 09:52:33,452 INFO L226 Difference]: Without dead ends: 40 [2018-10-04 09:52:33,452 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.4s impTime 20 [2018-10-04 09:52:33,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-04 09:52:33,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-10-04 09:52:33,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-04 09:52:33,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-10-04 09:52:33,457 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 37 [2018-10-04 09:52:33,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:33,458 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-10-04 09:52:33,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-04 09:52:33,458 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-10-04 09:52:33,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-04 09:52:33,459 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:33,459 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1] [2018-10-04 09:52:33,459 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:33,459 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:33,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1291894020, now seen corresponding path program 18 times [2018-10-04 09:52:33,459 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:33,460 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:33,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:33,460 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:52:33,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:33,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:33,832 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:52:33,834 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:33,835 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:33,835 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:52:33,842 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:52:33,858 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-04 09:52:33,858 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:52:33,860 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:34,180 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:34,234 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:34,254 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:34,254 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 38 [2018-10-04 09:52:34,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-04 09:52:34,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-04 09:52:34,255 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:34,255 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 40 states. [2018-10-04 09:52:34,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:34,356 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-04 09:52:34,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-04 09:52:34,356 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 39 [2018-10-04 09:52:34,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:34,357 INFO L225 Difference]: With dead ends: 43 [2018-10-04 09:52:34,358 INFO L226 Difference]: Without dead ends: 42 [2018-10-04 09:52:34,358 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.3s impTime 9 [2018-10-04 09:52:34,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-04 09:52:34,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-10-04 09:52:34,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-04 09:52:34,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-10-04 09:52:34,364 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 39 [2018-10-04 09:52:34,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:34,364 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-10-04 09:52:34,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-04 09:52:34,364 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-10-04 09:52:34,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-04 09:52:34,365 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:34,365 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1] [2018-10-04 09:52:34,365 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:34,366 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:34,366 INFO L82 PathProgramCache]: Analyzing trace with hash 264605766, now seen corresponding path program 19 times [2018-10-04 09:52:34,366 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:34,366 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:34,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:34,367 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:52:34,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:34,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:34,618 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:52:34,637 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:34,638 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:34,638 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:52:34,646 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:52:34,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:34,660 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:34,946 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:35,018 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:35,038 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:35,038 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 40 [2018-10-04 09:52:35,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-04 09:52:35,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-04 09:52:35,039 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:35,039 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 42 states. [2018-10-04 09:52:35,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:35,129 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-10-04 09:52:35,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-04 09:52:35,129 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 41 [2018-10-04 09:52:35,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:35,130 INFO L225 Difference]: With dead ends: 45 [2018-10-04 09:52:35,130 INFO L226 Difference]: Without dead ends: 44 [2018-10-04 09:52:35,131 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 10 [2018-10-04 09:52:35,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-04 09:52:35,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-10-04 09:52:35,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-04 09:52:35,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-10-04 09:52:35,135 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 41 [2018-10-04 09:52:35,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:35,136 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-10-04 09:52:35,136 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-04 09:52:35,136 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-10-04 09:52:35,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-04 09:52:35,137 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:35,137 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1] [2018-10-04 09:52:35,137 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:35,137 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:35,137 INFO L82 PathProgramCache]: Analyzing trace with hash 883071752, now seen corresponding path program 20 times [2018-10-04 09:52:35,137 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:35,138 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:35,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:35,138 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:52:35,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:35,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:35,577 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:52:35,623 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:35,624 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:35,624 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:52:35,632 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:52:35,649 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:52:35,650 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:52:35,652 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:35,961 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:36,100 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:36,122 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:36,122 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 42 [2018-10-04 09:52:36,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-04 09:52:36,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-04 09:52:36,123 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:36,123 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 44 states. [2018-10-04 09:52:36,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:36,224 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-10-04 09:52:36,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-04 09:52:36,224 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 43 [2018-10-04 09:52:36,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:36,225 INFO L225 Difference]: With dead ends: 47 [2018-10-04 09:52:36,225 INFO L226 Difference]: Without dead ends: 46 [2018-10-04 09:52:36,226 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.6s impTime 11 [2018-10-04 09:52:36,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-04 09:52:36,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-10-04 09:52:36,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-04 09:52:36,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-10-04 09:52:36,231 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 43 [2018-10-04 09:52:36,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:36,231 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-10-04 09:52:36,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-04 09:52:36,231 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-10-04 09:52:36,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-10-04 09:52:36,232 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:36,232 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1] [2018-10-04 09:52:36,233 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:36,233 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:36,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1771569846, now seen corresponding path program 21 times [2018-10-04 09:52:36,233 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:36,233 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:36,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:36,234 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:52:36,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:36,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:37,127 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:52:37,196 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:37,196 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:37,197 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:52:37,206 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:52:37,229 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-10-04 09:52:37,229 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:52:37,233 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:38,385 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:38,494 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:38,516 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:38,516 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 44 [2018-10-04 09:52:38,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-04 09:52:38,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-04 09:52:38,516 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:38,517 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 46 states. [2018-10-04 09:52:38,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:38,658 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-04 09:52:38,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-04 09:52:38,660 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 45 [2018-10-04 09:52:38,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:38,661 INFO L225 Difference]: With dead ends: 49 [2018-10-04 09:52:38,661 INFO L226 Difference]: Without dead ends: 48 [2018-10-04 09:52:38,662 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time 1.5s impTime 12 [2018-10-04 09:52:38,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-04 09:52:38,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-10-04 09:52:38,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-04 09:52:38,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-10-04 09:52:38,666 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 45 [2018-10-04 09:52:38,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:38,666 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-10-04 09:52:38,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-04 09:52:38,667 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-10-04 09:52:38,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-04 09:52:38,667 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:38,668 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1] [2018-10-04 09:52:38,668 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:38,668 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:38,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1671571700, now seen corresponding path program 22 times [2018-10-04 09:52:38,668 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:38,668 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:38,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:38,669 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:52:38,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:38,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:38,907 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:52:38,952 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:38,952 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:38,952 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:52:38,959 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:52:38,972 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:52:38,972 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:52:38,975 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:39,697 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:40,251 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:40,278 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:40,278 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2018-10-04 09:52:40,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-04 09:52:40,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-04 09:52:40,279 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:40,279 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 48 states. [2018-10-04 09:52:40,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:40,375 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-10-04 09:52:40,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-04 09:52:40,375 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 47 [2018-10-04 09:52:40,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:40,376 INFO L225 Difference]: With dead ends: 51 [2018-10-04 09:52:40,376 INFO L226 Difference]: Without dead ends: 50 [2018-10-04 09:52:40,377 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.6s impTime 12 [2018-10-04 09:52:40,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-04 09:52:40,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-10-04 09:52:40,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-04 09:52:40,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-10-04 09:52:40,381 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 47 [2018-10-04 09:52:40,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:40,382 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-10-04 09:52:40,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-04 09:52:40,382 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-10-04 09:52:40,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-04 09:52:40,383 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:40,383 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1] [2018-10-04 09:52:40,383 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:40,383 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:40,383 INFO L82 PathProgramCache]: Analyzing trace with hash -62633906, now seen corresponding path program 23 times [2018-10-04 09:52:40,383 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:40,383 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:40,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:40,384 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:52:40,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:40,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:40,757 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:52:40,809 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:40,809 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:40,809 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:52:40,818 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:52:40,838 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-10-04 09:52:40,839 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:52:40,840 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:41,762 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:42,012 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:42,032 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:42,033 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 48 [2018-10-04 09:52:42,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-04 09:52:42,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-04 09:52:42,034 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:42,034 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 50 states. [2018-10-04 09:52:42,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:42,149 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-10-04 09:52:42,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-04 09:52:42,149 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 49 [2018-10-04 09:52:42,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:42,150 INFO L225 Difference]: With dead ends: 53 [2018-10-04 09:52:42,150 INFO L226 Difference]: Without dead ends: 52 [2018-10-04 09:52:42,151 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.6s impTime 13 [2018-10-04 09:52:42,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-10-04 09:52:42,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-10-04 09:52:42,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-04 09:52:42,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-10-04 09:52:42,156 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 49 [2018-10-04 09:52:42,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:42,156 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-10-04 09:52:42,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-04 09:52:42,157 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-10-04 09:52:42,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-04 09:52:42,157 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:42,158 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1] [2018-10-04 09:52:42,158 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:42,158 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:42,158 INFO L82 PathProgramCache]: Analyzing trace with hash -61640432, now seen corresponding path program 24 times [2018-10-04 09:52:42,158 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:42,159 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:42,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:42,159 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:52:42,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:42,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:42,473 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:52:42,613 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:42,614 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:42,614 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:52:42,627 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:52:42,659 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-04 09:52:42,659 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:52:42,662 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:43,158 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:43,411 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:43,431 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:43,431 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 50 [2018-10-04 09:52:43,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-04 09:52:43,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-04 09:52:43,432 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:43,432 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 52 states. [2018-10-04 09:52:43,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:43,551 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-10-04 09:52:43,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-04 09:52:43,552 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 51 [2018-10-04 09:52:43,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:43,552 INFO L225 Difference]: With dead ends: 55 [2018-10-04 09:52:43,553 INFO L226 Difference]: Without dead ends: 54 [2018-10-04 09:52:43,553 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.6s impTime 15 [2018-10-04 09:52:43,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-04 09:52:43,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-10-04 09:52:43,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-04 09:52:43,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-10-04 09:52:43,556 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 51 [2018-10-04 09:52:43,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:43,556 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-10-04 09:52:43,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-04 09:52:43,556 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-10-04 09:52:43,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-04 09:52:43,557 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:43,557 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1] [2018-10-04 09:52:43,557 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:43,557 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:43,558 INFO L82 PathProgramCache]: Analyzing trace with hash 893088082, now seen corresponding path program 25 times [2018-10-04 09:52:43,558 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:43,558 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:43,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:43,558 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:52:43,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:43,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:43,802 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:52:43,957 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:43,958 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:43,958 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:52:43,965 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:52:43,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:43,981 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:44,261 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:44,494 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:44,514 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:44,514 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 52 [2018-10-04 09:52:44,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-04 09:52:44,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-04 09:52:44,515 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:44,515 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 54 states. [2018-10-04 09:52:44,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:44,659 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-10-04 09:52:44,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-04 09:52:44,660 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 53 [2018-10-04 09:52:44,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:44,661 INFO L225 Difference]: With dead ends: 57 [2018-10-04 09:52:44,661 INFO L226 Difference]: Without dead ends: 56 [2018-10-04 09:52:44,661 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.6s impTime 16 [2018-10-04 09:52:44,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-04 09:52:44,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-10-04 09:52:44,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-04 09:52:44,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-10-04 09:52:44,666 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 53 [2018-10-04 09:52:44,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:44,666 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-10-04 09:52:44,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-04 09:52:44,666 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-10-04 09:52:44,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-04 09:52:44,667 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:44,667 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1] [2018-10-04 09:52:44,667 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:44,667 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:44,667 INFO L82 PathProgramCache]: Analyzing trace with hash -735811308, now seen corresponding path program 26 times [2018-10-04 09:52:44,668 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:44,668 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:44,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:44,668 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:52:44,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:44,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:44,950 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:52:45,147 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:45,147 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:45,147 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:52:45,154 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:52:45,172 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:52:45,172 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:52:45,174 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:45,434 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:45,674 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:45,694 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:45,695 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 54 [2018-10-04 09:52:45,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-04 09:52:45,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-04 09:52:45,695 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:45,696 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 56 states. [2018-10-04 09:52:45,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:45,873 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-10-04 09:52:45,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-04 09:52:45,874 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 55 [2018-10-04 09:52:45,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:45,875 INFO L225 Difference]: With dead ends: 59 [2018-10-04 09:52:45,875 INFO L226 Difference]: Without dead ends: 58 [2018-10-04 09:52:45,875 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.6s impTime 17 [2018-10-04 09:52:45,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-10-04 09:52:45,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-10-04 09:52:45,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-04 09:52:45,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-10-04 09:52:45,879 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 55 [2018-10-04 09:52:45,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:45,879 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-10-04 09:52:45,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-04 09:52:45,879 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-10-04 09:52:45,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-04 09:52:45,880 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:45,880 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1] [2018-10-04 09:52:45,880 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:45,880 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:45,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1554937942, now seen corresponding path program 27 times [2018-10-04 09:52:45,881 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:45,881 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:45,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:45,882 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:52:45,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:45,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:46,360 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:52:46,586 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:46,586 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:46,586 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:52:46,593 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:52:46,618 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-10-04 09:52:46,618 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:52:46,620 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:46,869 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:47,145 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:47,165 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:47,165 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 56 [2018-10-04 09:52:47,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-04 09:52:47,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-04 09:52:47,166 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:47,167 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 58 states. [2018-10-04 09:52:47,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:47,341 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-10-04 09:52:47,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-04 09:52:47,341 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 57 [2018-10-04 09:52:47,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:47,342 INFO L225 Difference]: With dead ends: 61 [2018-10-04 09:52:47,343 INFO L226 Difference]: Without dead ends: 60 [2018-10-04 09:52:47,343 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.8s impTime 18 [2018-10-04 09:52:47,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-04 09:52:47,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-10-04 09:52:47,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-04 09:52:47,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-10-04 09:52:47,346 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 57 [2018-10-04 09:52:47,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:47,346 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-10-04 09:52:47,346 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-04 09:52:47,347 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-10-04 09:52:47,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-10-04 09:52:47,347 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:47,347 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1] [2018-10-04 09:52:47,348 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:47,348 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:47,348 INFO L82 PathProgramCache]: Analyzing trace with hash -353255656, now seen corresponding path program 28 times [2018-10-04 09:52:47,348 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:47,348 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:47,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:47,349 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:52:47,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:47,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:47,632 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:52:47,878 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:47,878 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:47,878 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:52:47,886 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:52:47,921 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:52:47,921 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:52:47,923 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:48,764 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:49,091 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:49,111 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:49,111 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 58 [2018-10-04 09:52:49,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-04 09:52:49,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-04 09:52:49,112 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:49,112 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 60 states. [2018-10-04 09:52:49,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:49,404 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-10-04 09:52:49,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-04 09:52:49,405 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 59 [2018-10-04 09:52:49,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:49,405 INFO L225 Difference]: With dead ends: 63 [2018-10-04 09:52:49,405 INFO L226 Difference]: Without dead ends: 62 [2018-10-04 09:52:49,406 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.2s impTime 19 [2018-10-04 09:52:49,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-10-04 09:52:49,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-10-04 09:52:49,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-04 09:52:49,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-10-04 09:52:49,409 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 59 [2018-10-04 09:52:49,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:49,409 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-10-04 09:52:49,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-04 09:52:49,409 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-10-04 09:52:49,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-04 09:52:49,410 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:49,410 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1] [2018-10-04 09:52:49,410 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:49,411 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:49,411 INFO L82 PathProgramCache]: Analyzing trace with hash -176267942, now seen corresponding path program 29 times [2018-10-04 09:52:49,411 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:49,411 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:49,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:49,412 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:52:49,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:49,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:49,707 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:52:49,817 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:49,817 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:49,817 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:52:49,825 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:52:49,858 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-10-04 09:52:49,858 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:52:49,860 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:50,156 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:50,498 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:50,518 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:50,518 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 60 [2018-10-04 09:52:50,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-04 09:52:50,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-04 09:52:50,519 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:50,519 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 62 states. [2018-10-04 09:52:50,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:50,748 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-10-04 09:52:50,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-04 09:52:50,748 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 61 [2018-10-04 09:52:50,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:50,749 INFO L225 Difference]: With dead ends: 65 [2018-10-04 09:52:50,750 INFO L226 Difference]: Without dead ends: 64 [2018-10-04 09:52:50,750 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.7s impTime 20 [2018-10-04 09:52:50,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-10-04 09:52:50,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-10-04 09:52:50,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-04 09:52:50,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-10-04 09:52:50,754 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 61 [2018-10-04 09:52:50,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:50,754 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-10-04 09:52:50,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-04 09:52:50,754 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-10-04 09:52:50,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-04 09:52:50,755 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:50,755 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1] [2018-10-04 09:52:50,755 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:50,755 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:50,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1889766628, now seen corresponding path program 30 times [2018-10-04 09:52:50,756 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:50,756 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:50,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:50,757 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:52:50,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:50,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:51,593 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:52:51,915 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:51,915 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:51,915 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:52:51,925 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:52:51,958 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-04 09:52:51,958 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:52:51,960 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:52,247 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:52,611 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:52,632 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:52,632 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 62 [2018-10-04 09:52:52,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-04 09:52:52,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-04 09:52:52,633 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:52,633 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 64 states. [2018-10-04 09:52:52,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:52,791 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-10-04 09:52:52,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-04 09:52:52,792 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 63 [2018-10-04 09:52:52,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:52,793 INFO L225 Difference]: With dead ends: 67 [2018-10-04 09:52:52,793 INFO L226 Difference]: Without dead ends: 66 [2018-10-04 09:52:52,793 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 1.3s impTime 21 [2018-10-04 09:52:52,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-04 09:52:52,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-10-04 09:52:52,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-04 09:52:52,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-10-04 09:52:52,797 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 63 [2018-10-04 09:52:52,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:52,798 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-10-04 09:52:52,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-04 09:52:52,798 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-10-04 09:52:52,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-04 09:52:52,798 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:52,798 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1] [2018-10-04 09:52:52,798 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:52,799 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:52,799 INFO L82 PathProgramCache]: Analyzing trace with hash 705437790, now seen corresponding path program 31 times [2018-10-04 09:52:52,799 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:52,799 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:52,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:52,800 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:52:52,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:52,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:53,107 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:52:53,627 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:53,628 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:53,628 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:52:53,635 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:52:53,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:53,654 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:53,996 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:54,412 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:54,432 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:54,432 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 64 [2018-10-04 09:52:54,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-04 09:52:54,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-04 09:52:54,433 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:54,433 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 66 states. [2018-10-04 09:52:54,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:54,607 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-10-04 09:52:54,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-04 09:52:54,607 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 65 [2018-10-04 09:52:54,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:54,608 INFO L225 Difference]: With dead ends: 69 [2018-10-04 09:52:54,608 INFO L226 Difference]: Without dead ends: 68 [2018-10-04 09:52:54,609 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 1.1s impTime 22 [2018-10-04 09:52:54,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-04 09:52:54,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-10-04 09:52:54,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-04 09:52:54,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-10-04 09:52:54,612 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 65 [2018-10-04 09:52:54,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:54,612 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-10-04 09:52:54,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-04 09:52:54,613 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-10-04 09:52:54,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-04 09:52:54,613 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:54,613 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1] [2018-10-04 09:52:54,613 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:54,613 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:54,614 INFO L82 PathProgramCache]: Analyzing trace with hash -679115488, now seen corresponding path program 32 times [2018-10-04 09:52:54,614 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:54,614 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:54,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:54,615 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:52:54,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:54,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:55,207 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:52:55,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:55,457 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:55,457 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:52:55,464 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:52:55,483 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:52:55,484 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:52:55,486 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:55,877 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:56,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:56,390 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:56,391 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 66 [2018-10-04 09:52:56,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-04 09:52:56,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-04 09:52:56,392 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:56,392 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 68 states. [2018-10-04 09:52:56,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:56,566 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-10-04 09:52:56,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-04 09:52:56,566 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 67 [2018-10-04 09:52:56,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:56,567 INFO L225 Difference]: With dead ends: 71 [2018-10-04 09:52:56,567 INFO L226 Difference]: Without dead ends: 70 [2018-10-04 09:52:56,567 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.1s impTime 23 [2018-10-04 09:52:56,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-10-04 09:52:56,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-10-04 09:52:56,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-04 09:52:56,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-10-04 09:52:56,571 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 67 [2018-10-04 09:52:56,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:56,571 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-10-04 09:52:56,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-04 09:52:56,571 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-10-04 09:52:56,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-10-04 09:52:56,572 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:56,572 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1] [2018-10-04 09:52:56,572 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:56,573 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:56,573 INFO L82 PathProgramCache]: Analyzing trace with hash 205046114, now seen corresponding path program 33 times [2018-10-04 09:52:56,573 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:56,573 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:56,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:56,574 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:52:56,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:56,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:56,928 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:52:57,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:57,768 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:57,768 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:52:57,776 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:52:57,809 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-10-04 09:52:57,809 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:52:57,811 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:58,104 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:58,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:58,801 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:58,801 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 68 [2018-10-04 09:52:58,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-04 09:52:58,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-04 09:52:58,802 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:58,802 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 70 states. [2018-10-04 09:52:58,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:58,981 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-10-04 09:52:58,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-04 09:52:58,982 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 69 [2018-10-04 09:52:58,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:58,983 INFO L225 Difference]: With dead ends: 73 [2018-10-04 09:52:58,983 INFO L226 Difference]: Without dead ends: 72 [2018-10-04 09:52:58,984 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time 1.7s impTime 24 [2018-10-04 09:52:58,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-10-04 09:52:58,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-10-04 09:52:58,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-10-04 09:52:58,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-10-04 09:52:58,987 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 69 [2018-10-04 09:52:58,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:58,987 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-10-04 09:52:58,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-04 09:52:58,987 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-10-04 09:52:58,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-10-04 09:52:58,987 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:58,987 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1] [2018-10-04 09:52:58,988 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:58,988 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:58,988 INFO L82 PathProgramCache]: Analyzing trace with hash -519178972, now seen corresponding path program 34 times [2018-10-04 09:52:58,988 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:58,988 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:58,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:58,989 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:52:58,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:58,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:59,589 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:52:59,869 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:59,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:59,878 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:59,878 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:52:59,886 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:52:59,905 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:52:59,905 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:52:59,907 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:53:00,631 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:00,977 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:01,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:01,030 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:53:01,030 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 70 [2018-10-04 09:53:01,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-04 09:53:01,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-04 09:53:01,031 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:53:01,031 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 72 states. [2018-10-04 09:53:01,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:53:01,196 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-10-04 09:53:01,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-04 09:53:01,196 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 71 [2018-10-04 09:53:01,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:53:01,197 INFO L225 Difference]: With dead ends: 75 [2018-10-04 09:53:01,197 INFO L226 Difference]: Without dead ends: 74 [2018-10-04 09:53:01,197 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 0.9s impTime 8 [2018-10-04 09:53:01,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-04 09:53:01,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-10-04 09:53:01,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-10-04 09:53:01,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-10-04 09:53:01,201 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 71 [2018-10-04 09:53:01,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:53:01,202 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-10-04 09:53:01,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-04 09:53:01,202 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-10-04 09:53:01,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-10-04 09:53:01,202 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:53:01,202 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1] [2018-10-04 09:53:01,203 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:53:01,203 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:53:01,203 INFO L82 PathProgramCache]: Analyzing trace with hash -714784666, now seen corresponding path program 35 times [2018-10-04 09:53:01,203 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:53:01,203 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:53:01,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:01,204 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:53:01,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:01,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:53:01,530 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:53:01,758 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:01,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:01,791 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:53:01,791 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:53:01,813 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:53:01,848 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-10-04 09:53:01,849 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:53:01,851 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:53:02,150 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:02,742 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:02,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:02,850 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:53:02,850 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 72 [2018-10-04 09:53:02,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-04 09:53:02,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-04 09:53:02,851 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:53:02,851 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 74 states. [2018-10-04 09:53:03,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:53:03,367 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-10-04 09:53:03,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-04 09:53:03,367 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 73 [2018-10-04 09:53:03,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:53:03,368 INFO L225 Difference]: With dead ends: 77 [2018-10-04 09:53:03,368 INFO L226 Difference]: Without dead ends: 76 [2018-10-04 09:53:03,369 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 1.0s impTime 9 [2018-10-04 09:53:03,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-10-04 09:53:03,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-10-04 09:53:03,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-04 09:53:03,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-10-04 09:53:03,372 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 73 [2018-10-04 09:53:03,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:53:03,372 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-10-04 09:53:03,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-04 09:53:03,372 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-10-04 09:53:03,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-10-04 09:53:03,373 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:53:03,373 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1] [2018-10-04 09:53:03,373 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:53:03,373 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:53:03,373 INFO L82 PathProgramCache]: Analyzing trace with hash 286704424, now seen corresponding path program 36 times [2018-10-04 09:53:03,373 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:53:03,373 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:53:03,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:03,374 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:53:03,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:03,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:53:03,878 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:53:04,358 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:04,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:04,431 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:53:04,431 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:53:04,440 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:53:04,474 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-04 09:53:04,474 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:53:04,477 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:53:04,688 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:05,145 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:05,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:05,266 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:53:05,267 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 74 [2018-10-04 09:53:05,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-04 09:53:05,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-04 09:53:05,268 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:53:05,268 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 76 states. [2018-10-04 09:53:05,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:53:05,445 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-10-04 09:53:05,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-04 09:53:05,445 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 75 [2018-10-04 09:53:05,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:53:05,446 INFO L225 Difference]: With dead ends: 79 [2018-10-04 09:53:05,446 INFO L226 Difference]: Without dead ends: 78 [2018-10-04 09:53:05,446 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.2s impTime 10 [2018-10-04 09:53:05,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-10-04 09:53:05,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-10-04 09:53:05,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-10-04 09:53:05,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-10-04 09:53:05,449 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 75 [2018-10-04 09:53:05,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:53:05,449 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-10-04 09:53:05,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-04 09:53:05,449 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-10-04 09:53:05,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-10-04 09:53:05,450 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:53:05,450 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1] [2018-10-04 09:53:05,450 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:53:05,451 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:53:05,451 INFO L82 PathProgramCache]: Analyzing trace with hash 645045610, now seen corresponding path program 37 times [2018-10-04 09:53:05,451 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:53:05,451 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:53:05,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:05,452 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:53:05,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:05,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:53:05,815 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:53:06,279 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:06,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:06,407 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:53:06,408 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:53:06,415 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:53:06,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:53:06,439 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:53:06,755 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 8 [2018-10-04 09:53:07,339 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 26 new depth: 8 [2018-10-04 09:53:07,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:07,501 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:53:07,502 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 76 [2018-10-04 09:53:07,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-04 09:53:07,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-04 09:53:07,503 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:53:07,503 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 78 states. [2018-10-04 09:53:07,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:53:07,729 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-10-04 09:53:07,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-04 09:53:07,730 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 77 [2018-10-04 09:53:07,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:53:07,730 INFO L225 Difference]: With dead ends: 81 [2018-10-04 09:53:07,730 INFO L226 Difference]: Without dead ends: 80 [2018-10-04 09:53:07,731 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 1.4s impTime 11 [2018-10-04 09:53:07,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-10-04 09:53:07,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-10-04 09:53:07,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-04 09:53:07,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-10-04 09:53:07,734 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 77 [2018-10-04 09:53:07,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:53:07,735 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-10-04 09:53:07,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-04 09:53:07,735 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-10-04 09:53:07,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-04 09:53:07,735 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:53:07,735 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1] [2018-10-04 09:53:07,736 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:53:07,736 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:53:07,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1413541676, now seen corresponding path program 38 times [2018-10-04 09:53:07,736 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:53:07,736 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:53:07,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:07,737 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:53:07,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:07,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:53:08,087 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:53:08,638 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:08,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:08,982 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:53:08,982 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:53:08,990 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:53:09,011 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:53:09,011 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:53:09,013 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:53:09,321 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:09,913 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:10,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:10,121 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:53:10,121 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 78 [2018-10-04 09:53:10,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-04 09:53:10,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-04 09:53:10,122 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:53:10,122 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 80 states. [2018-10-04 09:53:10,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:53:10,329 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-10-04 09:53:10,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-04 09:53:10,330 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 79 [2018-10-04 09:53:10,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:53:10,331 INFO L225 Difference]: With dead ends: 83 [2018-10-04 09:53:10,331 INFO L226 Difference]: Without dead ends: 82 [2018-10-04 09:53:10,332 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time 1.8s impTime 12 [2018-10-04 09:53:10,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-10-04 09:53:10,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-10-04 09:53:10,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-10-04 09:53:10,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-10-04 09:53:10,337 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 79 [2018-10-04 09:53:10,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:53:10,337 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-10-04 09:53:10,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-04 09:53:10,337 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-10-04 09:53:10,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-10-04 09:53:10,338 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:53:10,338 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1] [2018-10-04 09:53:10,338 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:53:10,338 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:53:10,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1203886190, now seen corresponding path program 39 times [2018-10-04 09:53:10,339 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:53:10,339 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:53:10,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:10,340 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:53:10,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:10,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:53:10,638 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:53:11,143 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:11,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:11,355 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:53:11,356 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:53:11,363 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:53:11,402 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-10-04 09:53:11,402 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:53:11,404 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:53:11,685 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:12,276 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:12,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:12,521 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:53:12,521 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 80 [2018-10-04 09:53:12,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-04 09:53:12,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-04 09:53:12,522 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:53:12,522 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 82 states. [2018-10-04 09:53:12,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:53:12,742 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-10-04 09:53:12,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-04 09:53:12,742 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 81 [2018-10-04 09:53:12,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:53:12,743 INFO L225 Difference]: With dead ends: 85 [2018-10-04 09:53:12,743 INFO L226 Difference]: Without dead ends: 84 [2018-10-04 09:53:12,744 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 1.6s impTime 13 [2018-10-04 09:53:12,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-10-04 09:53:12,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-10-04 09:53:12,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-10-04 09:53:12,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-10-04 09:53:12,746 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 81 [2018-10-04 09:53:12,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:53:12,747 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-10-04 09:53:12,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-04 09:53:12,747 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-10-04 09:53:12,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-04 09:53:12,747 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:53:12,748 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1] [2018-10-04 09:53:12,748 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:53:12,748 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:53:12,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1588427056, now seen corresponding path program 40 times [2018-10-04 09:53:12,748 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:53:12,748 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:53:12,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:12,749 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:53:12,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:12,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:53:13,162 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:53:13,633 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:13,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:13,959 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:53:13,959 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:53:13,966 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:53:13,989 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:53:13,989 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:53:13,991 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:53:14,382 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:14,970 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:15,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:15,268 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:53:15,268 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 82 [2018-10-04 09:53:15,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-04 09:53:15,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-04 09:53:15,270 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:53:15,270 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 84 states. [2018-10-04 09:53:15,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:53:15,518 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-10-04 09:53:15,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-04 09:53:15,518 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 83 [2018-10-04 09:53:15,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:53:15,519 INFO L225 Difference]: With dead ends: 87 [2018-10-04 09:53:15,519 INFO L226 Difference]: Without dead ends: 86 [2018-10-04 09:53:15,519 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time 1.8s impTime 14 [2018-10-04 09:53:15,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-04 09:53:15,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-10-04 09:53:15,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-04 09:53:15,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-10-04 09:53:15,523 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 83 [2018-10-04 09:53:15,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:53:15,524 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-10-04 09:53:15,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-04 09:53:15,524 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-10-04 09:53:15,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-10-04 09:53:15,524 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:53:15,525 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1] [2018-10-04 09:53:15,525 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:53:15,525 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:53:15,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1765011826, now seen corresponding path program 41 times [2018-10-04 09:53:15,525 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:53:15,525 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:53:15,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:15,526 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:53:15,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:15,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:53:15,916 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:53:16,137 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:16,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:16,285 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:53:16,285 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:53:16,292 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:53:16,333 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-10-04 09:53:16,333 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:53:16,335 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:53:16,651 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:17,063 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:17,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:17,292 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:53:17,292 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 84 [2018-10-04 09:53:17,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-04 09:53:17,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-04 09:53:17,294 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:53:17,294 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 86 states. [2018-10-04 09:53:17,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:53:17,507 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-10-04 09:53:17,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-04 09:53:17,508 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 85 [2018-10-04 09:53:17,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:53:17,509 INFO L225 Difference]: With dead ends: 89 [2018-10-04 09:53:17,509 INFO L226 Difference]: Without dead ends: 88 [2018-10-04 09:53:17,509 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 1.0s impTime 15 [2018-10-04 09:53:17,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-10-04 09:53:17,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-10-04 09:53:17,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-04 09:53:17,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-10-04 09:53:17,514 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 85 [2018-10-04 09:53:17,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:53:17,514 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-10-04 09:53:17,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-04 09:53:17,514 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-10-04 09:53:17,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-04 09:53:17,515 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:53:17,515 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1] [2018-10-04 09:53:17,515 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:53:17,515 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:53:17,515 INFO L82 PathProgramCache]: Analyzing trace with hash -335716044, now seen corresponding path program 42 times [2018-10-04 09:53:17,515 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:53:17,516 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:53:17,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:17,516 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:53:17,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:17,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:53:17,777 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:53:18,244 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:18,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:18,507 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:53:18,507 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:53:18,515 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:53:18,561 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-10-04 09:53:18,562 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:53:18,564 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:53:19,047 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:19,722 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:20,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:20,094 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:53:20,094 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 86 [2018-10-04 09:53:20,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-04 09:53:20,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-04 09:53:20,095 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:53:20,095 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 88 states. [2018-10-04 09:53:20,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:53:20,326 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-10-04 09:53:20,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-04 09:53:20,327 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 87 [2018-10-04 09:53:20,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:53:20,327 INFO L225 Difference]: With dead ends: 91 [2018-10-04 09:53:20,327 INFO L226 Difference]: Without dead ends: 90 [2018-10-04 09:53:20,328 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time 1.8s impTime 16 [2018-10-04 09:53:20,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-10-04 09:53:20,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-10-04 09:53:20,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-10-04 09:53:20,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-10-04 09:53:20,332 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 87 [2018-10-04 09:53:20,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:53:20,332 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-10-04 09:53:20,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-04 09:53:20,332 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-10-04 09:53:20,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-10-04 09:53:20,332 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:53:20,333 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1] [2018-10-04 09:53:20,333 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:53:20,333 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:53:20,333 INFO L82 PathProgramCache]: Analyzing trace with hash -500569994, now seen corresponding path program 43 times [2018-10-04 09:53:20,333 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:53:20,333 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:53:20,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:20,334 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:53:20,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:20,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:53:20,585 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:53:21,037 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:21,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:21,425 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:53:21,425 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:53:21,433 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:53:21,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:53:21,459 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:53:21,794 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:22,395 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:22,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:22,796 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:53:22,796 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 88 [2018-10-04 09:53:22,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-04 09:53:22,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-04 09:53:22,797 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:53:22,797 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 90 states. [2018-10-04 09:53:23,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:53:23,012 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-10-04 09:53:23,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-04 09:53:23,013 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 89 [2018-10-04 09:53:23,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:53:23,014 INFO L225 Difference]: With dead ends: 93 [2018-10-04 09:53:23,014 INFO L226 Difference]: Without dead ends: 92 [2018-10-04 09:53:23,014 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time 1.9s impTime 17 [2018-10-04 09:53:23,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-10-04 09:53:23,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-10-04 09:53:23,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-10-04 09:53:23,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-10-04 09:53:23,017 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 89 [2018-10-04 09:53:23,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:53:23,017 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-10-04 09:53:23,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-04 09:53:23,017 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-10-04 09:53:23,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-10-04 09:53:23,018 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:53:23,018 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1] [2018-10-04 09:53:23,018 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:53:23,018 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:53:23,019 INFO L82 PathProgramCache]: Analyzing trace with hash -11425992, now seen corresponding path program 44 times [2018-10-04 09:53:23,019 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:53:23,019 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:53:23,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:23,020 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:53:23,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:23,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:53:23,442 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:53:23,817 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:23,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:23,947 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:53:23,947 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:53:23,956 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:53:23,981 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:53:23,981 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:53:23,983 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:53:24,428 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:24,990 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:25,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:25,503 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:53:25,504 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 90 [2018-10-04 09:53:25,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-04 09:53:25,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-04 09:53:25,505 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:53:25,505 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 92 states. [2018-10-04 09:53:25,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:53:25,734 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-10-04 09:53:25,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-04 09:53:25,735 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 91 [2018-10-04 09:53:25,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:53:25,736 INFO L225 Difference]: With dead ends: 95 [2018-10-04 09:53:25,736 INFO L226 Difference]: Without dead ends: 94 [2018-10-04 09:53:25,736 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time 1.8s impTime 18 [2018-10-04 09:53:25,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-10-04 09:53:25,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-10-04 09:53:25,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-04 09:53:25,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-10-04 09:53:25,740 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 91 [2018-10-04 09:53:25,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:53:25,741 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-10-04 09:53:25,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-04 09:53:25,741 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-10-04 09:53:25,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-10-04 09:53:25,741 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:53:25,742 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1] [2018-10-04 09:53:25,742 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:53:25,742 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:53:25,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1904524666, now seen corresponding path program 45 times [2018-10-04 09:53:25,742 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:53:25,742 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:53:25,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:25,743 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:53:25,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:25,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:53:26,184 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:53:26,657 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:27,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:27,061 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:53:27,061 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:53:27,069 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:53:27,171 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-10-04 09:53:27,171 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:53:27,173 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:53:27,421 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:27,887 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:28,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:28,322 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:53:28,322 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 92 [2018-10-04 09:53:28,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-10-04 09:53:28,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-10-04 09:53:28,323 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:53:28,324 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 94 states. [2018-10-04 09:53:28,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:53:28,586 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-10-04 09:53:28,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-04 09:53:28,587 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 93 [2018-10-04 09:53:28,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:53:28,588 INFO L225 Difference]: With dead ends: 97 [2018-10-04 09:53:28,588 INFO L226 Difference]: Without dead ends: 96 [2018-10-04 09:53:28,588 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time 1.8s impTime 19 [2018-10-04 09:53:28,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-10-04 09:53:28,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-10-04 09:53:28,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-10-04 09:53:28,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-10-04 09:53:28,592 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 93 [2018-10-04 09:53:28,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:53:28,593 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-10-04 09:53:28,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-10-04 09:53:28,593 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-10-04 09:53:28,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-10-04 09:53:28,593 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:53:28,593 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1] [2018-10-04 09:53:28,593 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:53:28,593 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:53:28,594 INFO L82 PathProgramCache]: Analyzing trace with hash 592137020, now seen corresponding path program 46 times [2018-10-04 09:53:28,594 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:53:28,594 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:53:28,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:28,594 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:53:28,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:28,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:53:29,005 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:53:29,266 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:29,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:29,636 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:53:29,636 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:53:29,643 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:53:29,670 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:53:29,671 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:53:29,673 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:53:30,110 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:30,446 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:30,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:30,729 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:53:30,729 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 94 [2018-10-04 09:53:30,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-04 09:53:30,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-04 09:53:30,731 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:53:30,731 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 96 states. [2018-10-04 09:53:30,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:53:30,952 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-10-04 09:53:30,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-04 09:53:30,953 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 95 [2018-10-04 09:53:30,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:53:30,954 INFO L225 Difference]: With dead ends: 99 [2018-10-04 09:53:30,954 INFO L226 Difference]: Without dead ends: 98 [2018-10-04 09:53:30,954 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 1.3s impTime 18 [2018-10-04 09:53:30,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-10-04 09:53:30,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-10-04 09:53:30,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-04 09:53:30,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-10-04 09:53:30,959 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 95 [2018-10-04 09:53:30,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:53:30,959 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-10-04 09:53:30,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-04 09:53:30,959 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-10-04 09:53:30,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-10-04 09:53:30,960 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:53:30,960 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1] [2018-10-04 09:53:30,960 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:53:30,960 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:53:30,960 INFO L82 PathProgramCache]: Analyzing trace with hash 2107994238, now seen corresponding path program 47 times [2018-10-04 09:53:30,961 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:53:30,961 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:53:30,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:30,961 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:53:30,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:30,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:53:32,298 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:53:32,520 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:32,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:32,779 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:53:32,779 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:53:32,786 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:53:32,834 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-10-04 09:53:32,834 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:53:32,837 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:53:33,167 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:33,693 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:33,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:33,963 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:53:33,963 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 96 [2018-10-04 09:53:33,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-10-04 09:53:33,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-10-04 09:53:33,964 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:53:33,964 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 98 states. [2018-10-04 09:53:34,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:53:34,216 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-10-04 09:53:34,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-04 09:53:34,217 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 97 [2018-10-04 09:53:34,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:53:34,217 INFO L225 Difference]: With dead ends: 101 [2018-10-04 09:53:34,218 INFO L226 Difference]: Without dead ends: 100 [2018-10-04 09:53:34,218 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s Time 2.0s impTime 19 [2018-10-04 09:53:34,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-10-04 09:53:34,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-10-04 09:53:34,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-04 09:53:34,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-10-04 09:53:34,222 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 97 [2018-10-04 09:53:34,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:53:34,222 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-10-04 09:53:34,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-10-04 09:53:34,222 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-10-04 09:53:34,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-10-04 09:53:34,223 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:53:34,223 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1] [2018-10-04 09:53:34,223 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:53:34,224 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:53:34,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1442099904, now seen corresponding path program 48 times [2018-10-04 09:53:34,224 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:53:34,224 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:53:34,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:34,225 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:53:34,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:34,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:53:34,596 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:53:34,901 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:35,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:35,355 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:53:35,355 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:53:35,363 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:53:35,412 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-10-04 09:53:35,412 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:53:35,414 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:53:35,682 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:36,111 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:36,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:36,533 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:53:36,534 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 98 [2018-10-04 09:53:36,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-10-04 09:53:36,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-10-04 09:53:36,535 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:53:36,535 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 100 states. [2018-10-04 09:53:36,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:53:36,753 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-10-04 09:53:36,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-04 09:53:36,754 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 99 [2018-10-04 09:53:36,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:53:36,754 INFO L225 Difference]: With dead ends: 103 [2018-10-04 09:53:36,755 INFO L226 Difference]: Without dead ends: 102 [2018-10-04 09:53:36,755 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time 1.6s impTime 20 [2018-10-04 09:53:36,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-10-04 09:53:36,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-10-04 09:53:36,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-10-04 09:53:36,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-10-04 09:53:36,759 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 99 [2018-10-04 09:53:36,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:53:36,759 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-10-04 09:53:36,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-10-04 09:53:36,759 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-10-04 09:53:36,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-10-04 09:53:36,759 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:53:36,760 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1] [2018-10-04 09:53:36,760 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:53:36,760 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:53:36,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1416429954, now seen corresponding path program 49 times [2018-10-04 09:53:36,760 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:53:36,760 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:53:36,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:36,761 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:53:36,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:36,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:53:37,025 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:53:37,441 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:38,070 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:38,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:38,083 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:53:38,083 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:53:38,091 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:53:38,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:53:38,129 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:53:39,336 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:40,051 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:40,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:40,610 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:53:40,610 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 100 [2018-10-04 09:53:40,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-10-04 09:53:40,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-10-04 09:53:40,611 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:53:40,611 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 102 states. [2018-10-04 09:53:40,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:53:40,870 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-10-04 09:53:40,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-04 09:53:40,871 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 101 [2018-10-04 09:53:40,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:53:40,872 INFO L225 Difference]: With dead ends: 105 [2018-10-04 09:53:40,872 INFO L226 Difference]: Without dead ends: 104 [2018-10-04 09:53:40,872 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s Time 2.8s impTime 21 [2018-10-04 09:53:40,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-10-04 09:53:40,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-10-04 09:53:40,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-10-04 09:53:40,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-10-04 09:53:40,876 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 101 [2018-10-04 09:53:40,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:53:40,876 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-10-04 09:53:40,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-10-04 09:53:40,876 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-10-04 09:53:40,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-10-04 09:53:40,877 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:53:40,877 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1] [2018-10-04 09:53:40,877 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:53:40,878 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:53:40,878 INFO L82 PathProgramCache]: Analyzing trace with hash -315445948, now seen corresponding path program 50 times [2018-10-04 09:53:40,878 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:53:40,878 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:53:40,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:40,879 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:53:40,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:40,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:53:41,169 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:53:41,624 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:42,285 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:42,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:42,349 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:53:42,349 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:53:42,357 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:53:42,410 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:53:42,410 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:53:42,413 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:53:43,502 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:44,102 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:44,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:44,885 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:53:44,885 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 102 [2018-10-04 09:53:44,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-10-04 09:53:44,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-10-04 09:53:44,886 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:53:44,887 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 104 states. [2018-10-04 09:53:46,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:53:46,071 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-10-04 09:53:46,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-04 09:53:46,071 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 103 [2018-10-04 09:53:46,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:53:46,072 INFO L225 Difference]: With dead ends: 107 [2018-10-04 09:53:46,072 INFO L226 Difference]: Without dead ends: 106 [2018-10-04 09:53:46,072 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s Time 2.9s impTime 22 [2018-10-04 09:53:46,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-10-04 09:53:46,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-10-04 09:53:46,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-10-04 09:53:46,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-10-04 09:53:46,078 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 103 [2018-10-04 09:53:46,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:53:46,078 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-10-04 09:53:46,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-10-04 09:53:46,078 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-10-04 09:53:46,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-10-04 09:53:46,079 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:53:46,079 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1] [2018-10-04 09:53:46,079 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:53:46,079 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:53:46,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1799123078, now seen corresponding path program 51 times [2018-10-04 09:53:46,081 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:53:46,081 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:53:46,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:46,081 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:53:46,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:46,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:53:46,914 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:53:47,333 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:47,954 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:48,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:48,062 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:53:48,062 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:53:48,070 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:53:48,119 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-10-04 09:53:48,119 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:53:48,121 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:53:48,388 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:48,860 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:49,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:49,508 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:53:49,509 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 104 [2018-10-04 09:53:49,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-10-04 09:53:49,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-10-04 09:53:49,510 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:53:49,511 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 106 states. [2018-10-04 09:53:49,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:53:49,840 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-10-04 09:53:49,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-04 09:53:49,840 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 105 [2018-10-04 09:53:49,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:53:49,842 INFO L225 Difference]: With dead ends: 109 [2018-10-04 09:53:49,842 INFO L226 Difference]: Without dead ends: 108 [2018-10-04 09:53:49,842 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s Time 2.5s impTime 23 [2018-10-04 09:53:49,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-10-04 09:53:49,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-10-04 09:53:49,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-10-04 09:53:49,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-10-04 09:53:49,847 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 105 [2018-10-04 09:53:49,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:53:49,847 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-10-04 09:53:49,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-10-04 09:53:49,847 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-10-04 09:53:49,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-04 09:53:49,848 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:53:49,848 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1] [2018-10-04 09:53:49,848 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:53:49,848 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:53:49,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1914541240, now seen corresponding path program 52 times [2018-10-04 09:53:49,848 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:53:49,848 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:53:49,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:49,849 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:53:49,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:49,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:53:50,452 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:53:50,909 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:51,576 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:51,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:51,745 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:53:51,745 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:53:51,759 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:53:51,807 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:53:51,807 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:53:51,810 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:53:52,248 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:52,897 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:53,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:53,699 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:53:53,699 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 106 [2018-10-04 09:53:53,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-10-04 09:53:53,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-10-04 09:53:53,700 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:53:53,700 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 108 states. [2018-10-04 09:53:54,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:53:54,008 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-10-04 09:53:54,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-04 09:53:54,008 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 107 [2018-10-04 09:53:54,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:53:54,009 INFO L225 Difference]: With dead ends: 111 [2018-10-04 09:53:54,009 INFO L226 Difference]: Without dead ends: 110 [2018-10-04 09:53:54,009 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s Time 3.0s impTime 24 [2018-10-04 09:53:54,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-04 09:53:54,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-10-04 09:53:54,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-10-04 09:53:54,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-10-04 09:53:54,013 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 107 [2018-10-04 09:53:54,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:53:54,013 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-10-04 09:53:54,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-10-04 09:53:54,013 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-10-04 09:53:54,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-10-04 09:53:54,014 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:53:54,014 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1] [2018-10-04 09:53:54,014 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:53:54,015 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:53:54,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1628127862, now seen corresponding path program 53 times [2018-10-04 09:53:54,015 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:53:54,015 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:53:54,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:54,016 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:53:54,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:54,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:53:54,471 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:53:54,720 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:55,319 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:55,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:55,538 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:53:55,538 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:53:55,553 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:53:55,677 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-10-04 09:53:55,677 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:53:55,680 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:53:56,012 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:56,760 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:57,562 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:57,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:57,605 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:53:57,605 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 108 [2018-10-04 09:53:57,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-10-04 09:53:57,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-10-04 09:53:57,607 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:53:57,607 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 110 states. [2018-10-04 09:53:57,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:53:57,873 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-10-04 09:53:57,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-04 09:53:57,874 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 109 [2018-10-04 09:53:57,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:53:57,875 INFO L225 Difference]: With dead ends: 113 [2018-10-04 09:53:57,875 INFO L226 Difference]: Without dead ends: 112 [2018-10-04 09:53:57,875 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s Time 2.5s impTime 8 [2018-10-04 09:53:57,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-10-04 09:53:57,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-10-04 09:53:57,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-04 09:53:57,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-10-04 09:53:57,878 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 109 [2018-10-04 09:53:57,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:53:57,878 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-10-04 09:53:57,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-10-04 09:53:57,878 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-10-04 09:53:57,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-10-04 09:53:57,879 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:53:57,879 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1] [2018-10-04 09:53:57,879 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:53:57,879 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:53:57,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1262778548, now seen corresponding path program 54 times [2018-10-04 09:53:57,879 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:53:57,879 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:53:57,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:57,880 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:53:57,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:57,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:53:58,355 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:53:58,774 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:59,422 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:59,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:59,695 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:53:59,695 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:53:59,702 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:53:59,760 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-10-04 09:53:59,760 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:53:59,763 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:54:00,307 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:01,269 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:02,059 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:02,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:54:02,153 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:54:02,154 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 110 [2018-10-04 09:54:02,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-10-04 09:54:02,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-10-04 09:54:02,155 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:54:02,155 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 112 states. [2018-10-04 09:54:02,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:54:02,506 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-10-04 09:54:02,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-04 09:54:02,506 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 111 [2018-10-04 09:54:02,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:54:02,507 INFO L225 Difference]: With dead ends: 115 [2018-10-04 09:54:02,507 INFO L226 Difference]: Without dead ends: 114 [2018-10-04 09:54:02,507 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s Time 2.8s impTime 8 [2018-10-04 09:54:02,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-10-04 09:54:02,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-10-04 09:54:02,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-10-04 09:54:02,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2018-10-04 09:54:02,512 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 111 [2018-10-04 09:54:02,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:54:02,512 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2018-10-04 09:54:02,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-10-04 09:54:02,512 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2018-10-04 09:54:02,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-10-04 09:54:02,513 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:54:02,513 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1] [2018-10-04 09:54:02,513 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:54:02,514 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:54:02,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1945561230, now seen corresponding path program 55 times [2018-10-04 09:54:02,514 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:54:02,514 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:54:02,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:54:02,515 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:54:02,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:54:02,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:54:02,743 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:54:03,151 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:54:03,868 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:54:04,148 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:54:04,149 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:54:04,149 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:54:04,157 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:54:04,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:54:04,190 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:54:04,509 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:05,095 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:05,961 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:06,137 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:54:06,157 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:54:06,157 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 112 [2018-10-04 09:54:06,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-10-04 09:54:06,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-10-04 09:54:06,159 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:54:06,159 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 114 states. [2018-10-04 09:54:06,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:54:06,848 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-10-04 09:54:06,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-04 09:54:06,849 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 113 [2018-10-04 09:54:06,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:54:06,849 INFO L225 Difference]: With dead ends: 117 [2018-10-04 09:54:06,849 INFO L226 Difference]: Without dead ends: 116 [2018-10-04 09:54:06,850 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s Time 2.8s impTime 11 [2018-10-04 09:54:06,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-10-04 09:54:06,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-10-04 09:54:06,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-04 09:54:06,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2018-10-04 09:54:06,854 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 113 [2018-10-04 09:54:06,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:54:06,854 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2018-10-04 09:54:06,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-10-04 09:54:06,855 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2018-10-04 09:54:06,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-10-04 09:54:06,855 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:54:06,855 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 1, 1] [2018-10-04 09:54:06,855 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:54:06,856 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:54:06,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1373569360, now seen corresponding path program 56 times [2018-10-04 09:54:06,856 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:54:06,856 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:54:06,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:54:06,857 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:54:06,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:54:06,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:54:07,210 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:54:07,668 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:54:08,047 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:54:08,331 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:54:08,331 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:54:08,331 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:54:08,338 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:54:08,368 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:54:08,368 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:54:08,370 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:54:08,707 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:09,222 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:09,986 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:10,304 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:54:10,323 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:54:10,324 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 114 [2018-10-04 09:54:10,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-10-04 09:54:10,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-10-04 09:54:10,325 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:54:10,325 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 116 states. [2018-10-04 09:54:10,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:54:10,686 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-10-04 09:54:10,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-04 09:54:10,687 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 115 [2018-10-04 09:54:10,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:54:10,688 INFO L225 Difference]: With dead ends: 119 [2018-10-04 09:54:10,688 INFO L226 Difference]: Without dead ends: 118 [2018-10-04 09:54:10,688 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s Time 2.6s impTime 12 [2018-10-04 09:54:10,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-10-04 09:54:10,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-10-04 09:54:10,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-10-04 09:54:10,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2018-10-04 09:54:10,691 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 115 [2018-10-04 09:54:10,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:54:10,691 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2018-10-04 09:54:10,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-10-04 09:54:10,692 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2018-10-04 09:54:10,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-10-04 09:54:10,692 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:54:10,692 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 1, 1] [2018-10-04 09:54:10,692 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:54:10,692 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:54:10,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1445196178, now seen corresponding path program 57 times [2018-10-04 09:54:10,693 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:54:10,693 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:54:10,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:54:10,693 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:54:10,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:54:10,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:54:10,953 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:54:11,332 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:54:11,935 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:54:12,375 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:54:12,376 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:54:12,376 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:54:12,382 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:54:12,445 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-10-04 09:54:12,445 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:54:12,448 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:54:12,803 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:13,444 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:14,233 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:14,390 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:54:14,409 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:54:14,410 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 116 [2018-10-04 09:54:14,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-10-04 09:54:14,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-10-04 09:54:14,411 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:54:14,411 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 118 states. [2018-10-04 09:54:14,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:54:14,708 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-10-04 09:54:14,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-04 09:54:14,708 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 117 [2018-10-04 09:54:14,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:54:14,710 INFO L225 Difference]: With dead ends: 121 [2018-10-04 09:54:14,710 INFO L226 Difference]: Without dead ends: 120 [2018-10-04 09:54:14,710 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s Time 2.8s impTime 11 [2018-10-04 09:54:14,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-10-04 09:54:14,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2018-10-04 09:54:14,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-10-04 09:54:14,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2018-10-04 09:54:14,714 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 117 [2018-10-04 09:54:14,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:54:14,714 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2018-10-04 09:54:14,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-10-04 09:54:14,714 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2018-10-04 09:54:14,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-10-04 09:54:14,715 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:54:14,715 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 1, 1] [2018-10-04 09:54:14,715 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:54:14,715 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:54:14,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1559091540, now seen corresponding path program 58 times [2018-10-04 09:54:14,715 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:54:14,715 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:54:14,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:54:14,716 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:54:14,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:54:14,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:54:14,974 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:54:15,216 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:54:15,694 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:54:15,983 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:54:15,983 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:54:15,983 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:54:15,991 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:54:16,023 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:54:16,023 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:54:16,026 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:54:16,588 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:16,956 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:17,480 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:17,651 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:54:17,671 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:54:17,671 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 118 [2018-10-04 09:54:17,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-10-04 09:54:17,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-10-04 09:54:17,672 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:54:17,673 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand 120 states. [2018-10-04 09:54:17,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:54:17,966 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-10-04 09:54:17,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-04 09:54:17,967 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 119 [2018-10-04 09:54:17,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:54:17,967 INFO L225 Difference]: With dead ends: 123 [2018-10-04 09:54:17,967 INFO L226 Difference]: Without dead ends: 122 [2018-10-04 09:54:17,967 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s Time 2.0s impTime 12 [2018-10-04 09:54:17,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-10-04 09:54:17,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2018-10-04 09:54:17,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-10-04 09:54:17,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2018-10-04 09:54:17,972 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 119 [2018-10-04 09:54:17,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:54:17,972 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2018-10-04 09:54:17,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-10-04 09:54:17,972 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2018-10-04 09:54:17,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-10-04 09:54:17,973 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:54:17,973 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 1, 1] [2018-10-04 09:54:17,973 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:54:17,973 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:54:17,973 INFO L82 PathProgramCache]: Analyzing trace with hash -656615274, now seen corresponding path program 59 times [2018-10-04 09:54:17,973 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:54:17,974 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:54:17,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:54:17,974 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:54:17,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:54:17,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:54:18,414 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:54:18,698 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:54:19,056 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:54:19,623 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:54:19,623 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:54:19,623 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:54:19,631 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:54:19,695 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-10-04 09:54:19,695 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:54:19,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:54:20,203 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:20,968 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:21,761 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:22,071 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:54:22,091 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:54:22,091 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 120 [2018-10-04 09:54:22,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-10-04 09:54:22,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-10-04 09:54:22,093 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:54:22,093 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 122 states. [2018-10-04 09:54:22,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:54:22,524 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-10-04 09:54:22,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-04 09:54:22,524 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 121 [2018-10-04 09:54:22,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:54:22,525 INFO L225 Difference]: With dead ends: 125 [2018-10-04 09:54:22,525 INFO L226 Difference]: Without dead ends: 124 [2018-10-04 09:54:22,525 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s Time 3.1s impTime 13 [2018-10-04 09:54:22,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-10-04 09:54:22,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2018-10-04 09:54:22,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-10-04 09:54:22,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2018-10-04 09:54:22,530 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 121 [2018-10-04 09:54:22,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:54:22,530 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2018-10-04 09:54:22,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-10-04 09:54:22,530 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2018-10-04 09:54:22,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-10-04 09:54:22,531 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:54:22,531 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 1, 1] [2018-10-04 09:54:22,531 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:54:22,531 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:54:22,531 INFO L82 PathProgramCache]: Analyzing trace with hash 352915288, now seen corresponding path program 60 times [2018-10-04 09:54:22,532 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:54:22,532 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:54:22,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:54:22,532 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:54:22,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:54:22,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:54:23,472 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:54:23,716 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:54:24,179 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:54:24,643 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:54:24,644 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:54:24,644 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:54:24,652 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:54:24,712 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-10-04 09:54:24,712 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:54:24,715 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:54:25,006 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:25,437 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:26,389 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:26,787 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:54:26,806 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:54:26,807 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 122 [2018-10-04 09:54:26,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-10-04 09:54:26,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-10-04 09:54:26,808 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:54:26,808 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 124 states. [2018-10-04 09:54:27,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:54:27,146 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-10-04 09:54:27,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-04 09:54:27,147 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 123 [2018-10-04 09:54:27,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:54:27,148 INFO L225 Difference]: With dead ends: 127 [2018-10-04 09:54:27,148 INFO L226 Difference]: Without dead ends: 126 [2018-10-04 09:54:27,148 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s Time 3.2s impTime 14 [2018-10-04 09:54:27,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-10-04 09:54:27,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2018-10-04 09:54:27,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-10-04 09:54:27,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2018-10-04 09:54:27,151 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 123 [2018-10-04 09:54:27,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:54:27,151 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2018-10-04 09:54:27,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-10-04 09:54:27,151 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2018-10-04 09:54:27,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-10-04 09:54:27,152 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:54:27,152 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 1, 1] [2018-10-04 09:54:27,152 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:54:27,152 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:54:27,152 INFO L82 PathProgramCache]: Analyzing trace with hash -150823526, now seen corresponding path program 61 times [2018-10-04 09:54:27,152 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:54:27,152 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:54:27,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:54:27,153 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:54:27,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:54:27,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:54:27,385 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:54:27,821 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:54:28,452 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:54:28,568 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:54:28,568 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:54:28,568 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:54:28,577 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:54:28,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:54:28,610 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:54:28,985 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:29,584 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:30,327 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:30,823 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:54:30,843 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:54:30,843 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 124 [2018-10-04 09:54:30,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-10-04 09:54:30,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-10-04 09:54:30,845 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:54:30,845 INFO L87 Difference]: Start difference. First operand 126 states and 126 transitions. Second operand 126 states. [2018-10-04 09:54:31,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:54:31,220 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-10-04 09:54:31,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-04 09:54:31,220 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 125 [2018-10-04 09:54:31,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:54:31,221 INFO L225 Difference]: With dead ends: 129 [2018-10-04 09:54:31,221 INFO L226 Difference]: Without dead ends: 128 [2018-10-04 09:54:31,221 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s Time 2.8s impTime 15 [2018-10-04 09:54:31,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-10-04 09:54:31,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2018-10-04 09:54:31,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-10-04 09:54:31,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2018-10-04 09:54:31,224 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 125 [2018-10-04 09:54:31,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:54:31,225 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2018-10-04 09:54:31,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-10-04 09:54:31,225 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2018-10-04 09:54:31,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-10-04 09:54:31,225 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:54:31,225 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 1, 1] [2018-10-04 09:54:31,225 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:54:31,226 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:54:31,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1087480668, now seen corresponding path program 62 times [2018-10-04 09:54:31,226 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:54:31,226 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:54:31,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:54:31,226 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:54:31,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:54:31,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:54:31,516 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:54:31,908 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:54:32,530 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:54:33,263 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:54:33,264 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:54:33,264 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:54:33,273 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:54:33,306 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:54:33,307 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:54:33,309 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:54:33,735 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:34,340 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:35,093 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:35,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:54:35,556 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:54:35,556 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 126 [2018-10-04 09:54:35,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-10-04 09:54:35,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-10-04 09:54:35,558 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:54:35,558 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 128 states. [2018-10-04 09:54:35,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:54:35,996 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-10-04 09:54:35,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-04 09:54:35,996 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 127 [2018-10-04 09:54:35,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:54:35,997 INFO L225 Difference]: With dead ends: 131 [2018-10-04 09:54:35,997 INFO L226 Difference]: Without dead ends: 130 [2018-10-04 09:54:35,997 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s Time 3.4s impTime 16 [2018-10-04 09:54:35,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-10-04 09:54:36,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2018-10-04 09:54:36,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-10-04 09:54:36,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 130 transitions. [2018-10-04 09:54:36,001 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 130 transitions. Word has length 127 [2018-10-04 09:54:36,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:54:36,001 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 130 transitions. [2018-10-04 09:54:36,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-10-04 09:54:36,002 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 130 transitions. [2018-10-04 09:54:36,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-10-04 09:54:36,002 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:54:36,002 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 1, 1] [2018-10-04 09:54:36,003 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:54:36,003 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:54:36,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1391870110, now seen corresponding path program 63 times [2018-10-04 09:54:36,003 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:54:36,003 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:54:36,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:54:36,004 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:54:36,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:54:36,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:54:36,211 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:54:36,558 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:54:37,149 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:54:37,949 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:54:37,950 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:54:37,950 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:54:37,958 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:54:38,035 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-10-04 09:54:38,036 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:54:38,038 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:54:38,414 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:38,997 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:39,738 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 9 [2018-10-04 09:54:40,235 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:54:40,255 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:54:40,255 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 128 [2018-10-04 09:54:40,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-10-04 09:54:40,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-10-04 09:54:40,257 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:54:40,257 INFO L87 Difference]: Start difference. First operand 130 states and 130 transitions. Second operand 130 states. [2018-10-04 09:54:40,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:54:40,610 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-10-04 09:54:40,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-04 09:54:40,610 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 129 [2018-10-04 09:54:40,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:54:40,611 INFO L225 Difference]: With dead ends: 133 [2018-10-04 09:54:40,611 INFO L226 Difference]: Without dead ends: 132 [2018-10-04 09:54:40,611 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s Time 3.3s impTime 18 [2018-10-04 09:54:40,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-10-04 09:54:40,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2018-10-04 09:54:40,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-10-04 09:54:40,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2018-10-04 09:54:40,615 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 129 [2018-10-04 09:54:40,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:54:40,616 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2018-10-04 09:54:40,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-10-04 09:54:40,616 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2018-10-04 09:54:40,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-10-04 09:54:40,616 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:54:40,617 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 1, 1] [2018-10-04 09:54:40,617 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:54:40,617 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:54:40,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1852347744, now seen corresponding path program 64 times [2018-10-04 09:54:40,617 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:54:40,617 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:54:40,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:54:40,618 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:54:40,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:54:40,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:54:40,897 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:54:41,382 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:54:42,048 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:54:42,583 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:54:42,583 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:54:42,583 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:54:42,596 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:54:42,633 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:54:42,633 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:54:42,636 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:54:43,006 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:43,637 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:44,430 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 9 [2018-10-04 09:54:45,001 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:54:45,022 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:54:45,022 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 130 [2018-10-04 09:54:45,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-10-04 09:54:45,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-10-04 09:54:45,024 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:54:45,024 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand 132 states. [2018-10-04 09:54:45,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:54:45,388 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-10-04 09:54:45,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-04 09:54:45,388 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 131 [2018-10-04 09:54:45,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:54:45,389 INFO L225 Difference]: With dead ends: 135 [2018-10-04 09:54:45,389 INFO L226 Difference]: Without dead ends: 134 [2018-10-04 09:54:45,389 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s Time 3.5s impTime 18 [2018-10-04 09:54:45,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-10-04 09:54:45,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2018-10-04 09:54:45,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-10-04 09:54:45,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2018-10-04 09:54:45,392 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 131 [2018-10-04 09:54:45,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:54:45,393 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2018-10-04 09:54:45,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-10-04 09:54:45,393 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2018-10-04 09:54:45,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-10-04 09:54:45,393 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:54:45,393 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 1, 1] [2018-10-04 09:54:45,394 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:54:45,394 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:54:45,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1989722530, now seen corresponding path program 65 times [2018-10-04 09:54:45,394 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:54:45,394 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:54:45,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:54:45,394 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:54:45,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:54:45,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:54:45,902 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:54:46,266 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:54:46,515 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:54:46,998 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:54:46,998 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:54:46,998 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:54:47,006 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:54:47,079 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-10-04 09:54:47,079 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:54:47,088 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:54:47,481 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:48,874 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:49,635 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 9 [2018-10-04 09:54:50,322 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:54:50,342 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:54:50,343 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 132 [2018-10-04 09:54:50,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-10-04 09:54:50,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-10-04 09:54:50,344 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:54:50,344 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand 134 states. [2018-10-04 09:54:50,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:54:50,729 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-10-04 09:54:50,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-04 09:54:50,730 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 133 [2018-10-04 09:54:50,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:54:50,731 INFO L225 Difference]: With dead ends: 137 [2018-10-04 09:54:50,731 INFO L226 Difference]: Without dead ends: 136 [2018-10-04 09:54:50,731 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s Time 3.8s impTime 19 [2018-10-04 09:54:50,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-10-04 09:54:50,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2018-10-04 09:54:50,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-10-04 09:54:50,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2018-10-04 09:54:50,735 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 133 [2018-10-04 09:54:50,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:54:50,736 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2018-10-04 09:54:50,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-10-04 09:54:50,736 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2018-10-04 09:54:50,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-10-04 09:54:50,736 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:54:50,736 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 1, 1] [2018-10-04 09:54:50,737 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:54:50,737 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:54:50,737 INFO L82 PathProgramCache]: Analyzing trace with hash 862905700, now seen corresponding path program 66 times [2018-10-04 09:54:50,737 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:54:50,737 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:54:50,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:54:50,737 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:54:50,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:54:50,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:54:51,072 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:54:51,492 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:54:52,157 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:54:53,151 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:54:53,151 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:54:53,151 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:54:53,159 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:54:53,228 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-10-04 09:54:53,228 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:54:53,230 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:54:53,658 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:54,311 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:55,068 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 9 [2018-10-04 09:54:55,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:54:55,901 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:54:55,901 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 134 [2018-10-04 09:54:55,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-10-04 09:54:55,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-10-04 09:54:55,903 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:54:55,903 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand 136 states. [2018-10-04 09:54:56,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:54:56,362 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-10-04 09:54:56,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-04 09:54:56,362 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 135 [2018-10-04 09:54:56,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:54:56,363 INFO L225 Difference]: With dead ends: 139 [2018-10-04 09:54:56,363 INFO L226 Difference]: Without dead ends: 138 [2018-10-04 09:54:56,363 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6s Time 4.1s impTime 20 [2018-10-04 09:54:56,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-10-04 09:54:56,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2018-10-04 09:54:56,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-10-04 09:54:56,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2018-10-04 09:54:56,368 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 135 [2018-10-04 09:54:56,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:54:56,368 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2018-10-04 09:54:56,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-10-04 09:54:56,368 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2018-10-04 09:54:56,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-10-04 09:54:56,369 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:54:56,369 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 1, 1] [2018-10-04 09:54:56,369 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:54:56,369 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:54:56,370 INFO L82 PathProgramCache]: Analyzing trace with hash 323690662, now seen corresponding path program 67 times [2018-10-04 09:54:56,370 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:54:56,370 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:54:56,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:54:56,370 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:54:56,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:54:56,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:54:56,737 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:54:57,147 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:54:57,810 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:54:58,119 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:58,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:54:58,143 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:54:58,143 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:54:58,151 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:54:58,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:54:58,190 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:54:58,539 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:59,110 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:59,896 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:55:00,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:55:00,250 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:55:00,250 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 136 [2018-10-04 09:55:00,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-10-04 09:55:00,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-10-04 09:55:00,262 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:55:00,262 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand 138 states. [2018-10-04 09:55:00,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:55:00,649 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-10-04 09:55:00,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-04 09:55:00,649 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 137 [2018-10-04 09:55:00,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:55:00,650 INFO L225 Difference]: With dead ends: 141 [2018-10-04 09:55:00,650 INFO L226 Difference]: Without dead ends: 140 [2018-10-04 09:55:00,650 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s Time 2.9s impTime 23 [2018-10-04 09:55:00,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-10-04 09:55:00,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2018-10-04 09:55:00,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-10-04 09:55:00,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2018-10-04 09:55:00,654 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 137 [2018-10-04 09:55:00,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:55:00,654 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2018-10-04 09:55:00,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-10-04 09:55:00,655 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2018-10-04 09:55:00,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-10-04 09:55:00,655 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:55:00,656 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 1, 1] [2018-10-04 09:55:00,656 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:55:00,656 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:55:00,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1829081960, now seen corresponding path program 68 times [2018-10-04 09:55:00,656 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:55:00,656 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:55:00,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:55:00,657 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:55:00,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:55:00,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:55:00,853 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:55:01,298 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:55:01,681 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:55:02,763 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:55:02,855 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:55:02,855 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:55:02,855 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:55:02,862 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:55:02,898 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:55:02,898 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:55:02,900 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:55:03,222 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:55:03,742 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 9 [2018-10-04 09:55:04,528 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 26 new depth: 8 [2018-10-04 09:55:05,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:55:05,340 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:55:05,340 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 138 [2018-10-04 09:55:05,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 140 states [2018-10-04 09:55:05,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2018-10-04 09:55:05,342 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:55:05,342 INFO L87 Difference]: Start difference. First operand 140 states and 140 transitions. Second operand 140 states. [2018-10-04 09:55:05,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:55:05,727 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-10-04 09:55:05,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-04 09:55:05,727 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 139 [2018-10-04 09:55:05,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:55:05,728 INFO L225 Difference]: With dead ends: 143 [2018-10-04 09:55:05,728 INFO L226 Difference]: Without dead ends: 142 [2018-10-04 09:55:05,728 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s Time 3.7s impTime 24 [2018-10-04 09:55:05,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-10-04 09:55:05,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2018-10-04 09:55:05,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-10-04 09:55:05,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 142 transitions. [2018-10-04 09:55:05,732 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 142 transitions. Word has length 139 [2018-10-04 09:55:05,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:55:05,732 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 142 transitions. [2018-10-04 09:55:05,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has 140 states. [2018-10-04 09:55:05,732 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 142 transitions. [2018-10-04 09:55:05,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-10-04 09:55:05,733 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:55:05,733 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 1, 1] [2018-10-04 09:55:05,733 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:55:05,733 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:55:05,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1106140586, now seen corresponding path program 69 times [2018-10-04 09:55:05,734 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:55:05,734 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:55:05,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:55:05,734 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:55:05,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:55:05,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:55:05,914 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:55:06,232 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:55:06,775 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:55:07,698 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:55:07,838 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:55:07,838 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:55:07,838 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:55:07,845 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:55:07,923 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-10-04 09:55:07,924 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:55:07,926 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:55:08,192 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:55:08,729 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 9 [2018-10-04 09:55:09,523 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 26 new depth: 8 [2018-10-04 09:55:10,561 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:55:10,581 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:55:10,581 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 140 [2018-10-04 09:55:10,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-10-04 09:55:10,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-10-04 09:55:10,583 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:55:10,583 INFO L87 Difference]: Start difference. First operand 142 states and 142 transitions. Second operand 142 states. [2018-10-04 09:55:11,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:55:11,015 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-10-04 09:55:11,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-04 09:55:11,016 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 141 [2018-10-04 09:55:11,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:55:11,017 INFO L225 Difference]: With dead ends: 145 [2018-10-04 09:55:11,017 INFO L226 Difference]: Without dead ends: 144 [2018-10-04 09:55:11,017 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s Time 3.9s impTime 25 [2018-10-04 09:55:11,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-10-04 09:55:11,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2018-10-04 09:55:11,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-10-04 09:55:11,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 144 transitions. [2018-10-04 09:55:11,021 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 144 transitions. Word has length 141 [2018-10-04 09:55:11,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:55:11,021 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 144 transitions. [2018-10-04 09:55:11,021 INFO L481 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-10-04 09:55:11,021 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 144 transitions. [2018-10-04 09:55:11,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-10-04 09:55:11,022 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:55:11,022 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 1, 1] [2018-10-04 09:55:11,022 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:55:11,022 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:55:11,022 INFO L82 PathProgramCache]: Analyzing trace with hash 2144182124, now seen corresponding path program 70 times [2018-10-04 09:55:11,022 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:55:11,022 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:55:11,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:55:11,023 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:55:11,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:55:11,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:55:11,288 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:55:11,596 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:55:11,865 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:55:12,464 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:55:12,612 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:55:12,613 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:55:12,613 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:55:12,620 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:55:12,658 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:55:12,659 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:55:12,661 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:55:13,230 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:55:13,697 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 9 [2018-10-04 09:55:14,114 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 26 new depth: 8 [2018-10-04 09:55:14,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:55:14,779 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:55:14,779 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 142 [2018-10-04 09:55:14,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-10-04 09:55:14,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-10-04 09:55:14,780 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:55:14,780 INFO L87 Difference]: Start difference. First operand 144 states and 144 transitions. Second operand 144 states. [2018-10-04 09:55:15,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:55:15,191 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-10-04 09:55:15,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-04 09:55:15,191 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 143 [2018-10-04 09:55:15,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:55:15,192 INFO L225 Difference]: With dead ends: 147 [2018-10-04 09:55:15,192 INFO L226 Difference]: Without dead ends: 146 [2018-10-04 09:55:15,192 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s Time 2.7s impTime 27 [2018-10-04 09:55:15,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-10-04 09:55:15,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2018-10-04 09:55:15,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-10-04 09:55:15,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 146 transitions. [2018-10-04 09:55:15,197 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 146 transitions. Word has length 143 [2018-10-04 09:55:15,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:55:15,197 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 146 transitions. [2018-10-04 09:55:15,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-10-04 09:55:15,197 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 146 transitions. [2018-10-04 09:55:15,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-10-04 09:55:15,198 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:55:15,198 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 1, 1] [2018-10-04 09:55:15,198 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:55:15,198 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:55:15,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1025279826, now seen corresponding path program 71 times [2018-10-04 09:55:15,198 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:55:15,198 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:55:15,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:55:15,199 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:55:15,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:55:15,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:55:15,470 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:55:15,845 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:55:16,086 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:55:16,652 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:55:16,795 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:55:16,795 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:55:16,795 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:55:16,802 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:55:16,960 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-10-04 09:55:16,960 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:55:16,966 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:55:17,625 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:55:18,221 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 9 [2018-10-04 09:55:18,962 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 26 new depth: 8 [2018-10-04 09:55:20,124 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:55:20,145 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:55:20,145 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 144 [2018-10-04 09:55:20,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 146 states [2018-10-04 09:55:20,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2018-10-04 09:55:20,147 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:55:20,147 INFO L87 Difference]: Start difference. First operand 146 states and 146 transitions. Second operand 146 states. [2018-10-04 09:55:20,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:55:20,584 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-10-04 09:55:20,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-04 09:55:20,584 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 145 [2018-10-04 09:55:20,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:55:20,585 INFO L225 Difference]: With dead ends: 149 [2018-10-04 09:55:20,585 INFO L226 Difference]: Without dead ends: 148 [2018-10-04 09:55:20,585 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s Time 3.7s impTime 27 [2018-10-04 09:55:20,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-10-04 09:55:20,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2018-10-04 09:55:20,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-10-04 09:55:20,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2018-10-04 09:55:20,590 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 145 [2018-10-04 09:55:20,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:55:20,590 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2018-10-04 09:55:20,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has 146 states. [2018-10-04 09:55:20,590 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2018-10-04 09:55:20,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-10-04 09:55:20,591 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:55:20,591 INFO L375 BasicCegarLoop]: trace histogram [73, 72, 1, 1] [2018-10-04 09:55:20,591 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:55:20,591 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:55:20,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1746400912, now seen corresponding path program 72 times [2018-10-04 09:55:20,592 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:55:20,592 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:55:20,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:55:20,592 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:55:20,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:55:20,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:55:20,879 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:55:21,082 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:55:21,531 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:55:22,349 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:55:22,529 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:55:22,530 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:55:22,530 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:55:22,536 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:55:22,628 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-10-04 09:55:22,628 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:55:22,631 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:55:22,959 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:55:23,291 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 9 [2018-10-04 09:55:24,034 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 29 new depth: 9 [2018-10-04 09:55:24,632 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:55:24,652 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:55:24,652 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 146 [2018-10-04 09:55:24,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 148 states [2018-10-04 09:55:24,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2018-10-04 09:55:24,654 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:55:24,654 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 148 states. [2018-10-04 09:55:25,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:55:25,076 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-10-04 09:55:25,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-04 09:55:25,076 INFO L78 Accepts]: Start accepts. Automaton has 148 states. Word has length 147 [2018-10-04 09:55:25,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:55:25,077 INFO L225 Difference]: With dead ends: 151 [2018-10-04 09:55:25,077 INFO L226 Difference]: Without dead ends: 150 [2018-10-04 09:55:25,078 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s Time 3.0s impTime 24 [2018-10-04 09:55:25,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-10-04 09:55:25,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2018-10-04 09:55:25,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-10-04 09:55:25,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 150 transitions. [2018-10-04 09:55:25,082 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 150 transitions. Word has length 147 [2018-10-04 09:55:25,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:55:25,083 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 150 transitions. [2018-10-04 09:55:25,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has 148 states. [2018-10-04 09:55:25,083 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 150 transitions. [2018-10-04 09:55:25,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-10-04 09:55:25,084 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:55:25,084 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 1, 1] [2018-10-04 09:55:25,084 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:55:25,084 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:55:25,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1040937394, now seen corresponding path program 73 times [2018-10-04 09:55:25,084 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:55:25,084 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:55:25,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:55:25,085 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:55:25,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:55:25,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:55:25,349 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:55:25,793 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:55:26,454 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:55:27,534 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:55:27,985 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:55:27,985 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:55:27,986 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:55:27,993 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:55:28,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:55:28,031 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:55:28,338 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:55:28,994 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:55:29,734 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 9 [2018-10-04 09:55:31,117 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 29 new depth: 9 [2018-10-04 09:55:31,159 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:55:31,179 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:55:31,179 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 148 [2018-10-04 09:55:31,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 150 states [2018-10-04 09:55:31,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2018-10-04 09:55:31,182 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:55:31,182 INFO L87 Difference]: Start difference. First operand 150 states and 150 transitions. Second operand 150 states. [2018-10-04 09:55:31,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:55:31,671 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-10-04 09:55:31,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-04 09:55:31,671 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 149 [2018-10-04 09:55:31,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:55:31,672 INFO L225 Difference]: With dead ends: 153 [2018-10-04 09:55:31,672 INFO L226 Difference]: Without dead ends: 152 [2018-10-04 09:55:31,672 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.4s Time 5.0s impTime 9 [2018-10-04 09:55:31,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-10-04 09:55:31,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2018-10-04 09:55:31,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-10-04 09:55:31,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 152 transitions. [2018-10-04 09:55:31,676 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 152 transitions. Word has length 149 [2018-10-04 09:55:31,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:55:31,676 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 152 transitions. [2018-10-04 09:55:31,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has 150 states. [2018-10-04 09:55:31,676 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 152 transitions. [2018-10-04 09:55:31,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-10-04 09:55:31,677 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:55:31,677 INFO L375 BasicCegarLoop]: trace histogram [75, 74, 1, 1] [2018-10-04 09:55:31,678 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:55:31,678 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:55:31,678 INFO L82 PathProgramCache]: Analyzing trace with hash -386543244, now seen corresponding path program 74 times [2018-10-04 09:55:31,678 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:55:31,678 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:55:31,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:55:31,679 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:55:31,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:55:31,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:55:31,897 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:55:32,230 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:55:32,795 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:55:33,871 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:55:34,247 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:55:34,248 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:55:34,248 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:55:34,255 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:55:34,293 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:55:34,293 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:55:34,296 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:55:34,707 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:55:35,258 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:55:36,222 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 28 new depth: 9 [2018-10-04 09:55:37,380 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 28 new depth: 9 [2018-10-04 09:55:37,487 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:55:37,508 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:55:37,508 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 150 [2018-10-04 09:55:37,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 152 states [2018-10-04 09:55:37,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2018-10-04 09:55:37,510 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:55:37,510 INFO L87 Difference]: Start difference. First operand 152 states and 152 transitions. Second operand 152 states. [2018-10-04 09:55:37,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:55:37,958 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-10-04 09:55:37,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-04 09:55:37,958 INFO L78 Accepts]: Start accepts. Automaton has 152 states. Word has length 151 [2018-10-04 09:55:37,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:55:37,959 INFO L225 Difference]: With dead ends: 155 [2018-10-04 09:55:37,959 INFO L226 Difference]: Without dead ends: 154 [2018-10-04 09:55:37,959 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1s Time 4.6s impTime 10 [2018-10-04 09:55:37,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-10-04 09:55:37,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2018-10-04 09:55:37,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-10-04 09:55:37,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 154 transitions. [2018-10-04 09:55:37,964 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 154 transitions. Word has length 151 [2018-10-04 09:55:37,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:55:37,964 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 154 transitions. [2018-10-04 09:55:37,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has 152 states. [2018-10-04 09:55:37,964 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 154 transitions. [2018-10-04 09:55:37,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-10-04 09:55:37,965 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:55:37,965 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 1, 1] [2018-10-04 09:55:37,965 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:55:37,965 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:55:37,965 INFO L82 PathProgramCache]: Analyzing trace with hash -2100868938, now seen corresponding path program 75 times [2018-10-04 09:55:37,965 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:55:37,965 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:55:37,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:55:37,966 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:55:37,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:55:37,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:55:38,168 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:55:38,458 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:55:38,960 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:55:39,844 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:55:40,352 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:55:40,353 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:55:40,353 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:55:40,360 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:55:40,445 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-10-04 09:55:40,445 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:55:40,448 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:55:41,008 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:55:41,576 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:55:42,337 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 28 new depth: 9 [2018-10-04 09:55:43,637 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 28 new depth: 9 [2018-10-04 09:55:43,786 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:55:43,806 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:55:43,806 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 152 [2018-10-04 09:55:43,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 154 states [2018-10-04 09:55:43,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2018-10-04 09:55:43,808 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:55:43,808 INFO L87 Difference]: Start difference. First operand 154 states and 154 transitions. Second operand 154 states. [2018-10-04 09:55:44,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:55:44,266 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-10-04 09:55:44,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-04 09:55:44,266 INFO L78 Accepts]: Start accepts. Automaton has 154 states. Word has length 153 [2018-10-04 09:55:44,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:55:44,267 INFO L225 Difference]: With dead ends: 157 [2018-10-04 09:55:44,267 INFO L226 Difference]: Without dead ends: 156 [2018-10-04 09:55:44,267 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s Time 3.8s impTime 11 [2018-10-04 09:55:44,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-10-04 09:55:44,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2018-10-04 09:55:44,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-10-04 09:55:44,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 156 transitions. [2018-10-04 09:55:44,270 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 156 transitions. Word has length 153 [2018-10-04 09:55:44,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:55:44,270 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 156 transitions. [2018-10-04 09:55:44,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has 154 states. [2018-10-04 09:55:44,270 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 156 transitions. [2018-10-04 09:55:44,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-10-04 09:55:44,271 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:55:44,271 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 1, 1] [2018-10-04 09:55:44,271 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:55:44,271 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:55:44,271 INFO L82 PathProgramCache]: Analyzing trace with hash -300419208, now seen corresponding path program 76 times [2018-10-04 09:55:44,271 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:55:44,271 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:55:44,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:55:44,272 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:55:44,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:55:44,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:55:44,544 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:55:45,017 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:55:45,677 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:55:46,463 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:55:46,597 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:55:46,597 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:55:46,597 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:55:46,606 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:55:46,648 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:55:46,649 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:55:46,651 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:55:47,002 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:55:47,631 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:55:48,588 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 28 new depth: 9 [2018-10-04 09:55:49,338 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 28 new depth: 9 [2018-10-04 09:55:49,439 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:55:49,459 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:55:49,460 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 154 [2018-10-04 09:55:49,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 156 states [2018-10-04 09:55:49,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2018-10-04 09:55:49,461 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:55:49,461 INFO L87 Difference]: Start difference. First operand 156 states and 156 transitions. Second operand 156 states. [2018-10-04 09:55:49,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:55:49,936 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-10-04 09:55:49,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-04 09:55:49,936 INFO L78 Accepts]: Start accepts. Automaton has 156 states. Word has length 155 [2018-10-04 09:55:49,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:55:49,937 INFO L225 Difference]: With dead ends: 159 [2018-10-04 09:55:49,937 INFO L226 Difference]: Without dead ends: 158 [2018-10-04 09:55:49,937 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s Time 4.1s impTime 11 [2018-10-04 09:55:49,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-10-04 09:55:49,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2018-10-04 09:55:49,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-10-04 09:55:49,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 158 transitions. [2018-10-04 09:55:49,941 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 158 transitions. Word has length 155 [2018-10-04 09:55:49,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:55:49,941 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 158 transitions. [2018-10-04 09:55:49,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has 156 states. [2018-10-04 09:55:49,941 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 158 transitions. [2018-10-04 09:55:49,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-10-04 09:55:49,942 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:55:49,942 INFO L375 BasicCegarLoop]: trace histogram [78, 77, 1, 1] [2018-10-04 09:55:49,942 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:55:49,942 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:55:49,942 INFO L82 PathProgramCache]: Analyzing trace with hash -940048966, now seen corresponding path program 77 times [2018-10-04 09:55:49,943 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:55:49,943 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:55:49,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:55:49,943 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:55:49,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:55:49,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:55:50,189 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:55:50,617 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:55:50,953 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:55:52,048 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:55:52,728 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:55:52,728 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:55:52,728 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:55:52,736 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:55:52,828 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-10-04 09:55:52,829 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:55:52,833 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:55:53,175 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:55:53,913 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:55:54,813 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 28 new depth: 9 [2018-10-04 09:55:56,023 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 28 new depth: 9 [2018-10-04 09:55:56,309 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:55:56,329 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:55:56,329 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 156 [2018-10-04 09:55:56,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 158 states [2018-10-04 09:55:56,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2018-10-04 09:55:56,331 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:55:56,331 INFO L87 Difference]: Start difference. First operand 158 states and 158 transitions. Second operand 158 states. [2018-10-04 09:55:56,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:55:56,860 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-10-04 09:55:56,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-04 09:55:56,861 INFO L78 Accepts]: Start accepts. Automaton has 158 states. Word has length 157 [2018-10-04 09:55:56,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:55:56,861 INFO L225 Difference]: With dead ends: 161 [2018-10-04 09:55:56,862 INFO L226 Difference]: Without dead ends: 160 [2018-10-04 09:55:56,862 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6s Time 5.2s impTime 13 [2018-10-04 09:55:56,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-10-04 09:55:56,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2018-10-04 09:55:56,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-10-04 09:55:56,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 160 transitions. [2018-10-04 09:55:56,867 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 160 transitions. Word has length 157 [2018-10-04 09:55:56,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:55:56,867 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 160 transitions. [2018-10-04 09:55:56,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has 158 states. [2018-10-04 09:55:56,868 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 160 transitions. [2018-10-04 09:55:56,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-10-04 09:55:56,868 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:55:56,869 INFO L375 BasicCegarLoop]: trace histogram [79, 78, 1, 1] [2018-10-04 09:55:56,869 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:55:56,869 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:55:56,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1443923076, now seen corresponding path program 78 times [2018-10-04 09:55:56,869 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:55:56,869 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:55:56,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:55:56,870 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:55:56,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:55:56,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:55:57,138 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:55:57,561 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:55:58,222 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:55:59,298 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:56:00,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:56:00,118 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:56:00,118 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:56:00,126 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:56:00,251 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-10-04 09:56:00,251 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:56:00,253 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:56:00,577 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:56:01,275 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 9 [2018-10-04 09:56:02,222 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 29 new depth: 9 [2018-10-04 09:56:03,454 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 28 new depth: 9 [2018-10-04 09:56:03,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:56:03,754 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:56:03,754 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 158 [2018-10-04 09:56:03,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 160 states [2018-10-04 09:56:03,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2018-10-04 09:56:03,756 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:56:03,756 INFO L87 Difference]: Start difference. First operand 160 states and 160 transitions. Second operand 160 states. [2018-10-04 09:56:04,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:56:04,303 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-10-04 09:56:04,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-04 09:56:04,303 INFO L78 Accepts]: Start accepts. Automaton has 160 states. Word has length 159 [2018-10-04 09:56:04,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:56:04,304 INFO L225 Difference]: With dead ends: 163 [2018-10-04 09:56:04,304 INFO L226 Difference]: Without dead ends: 162 [2018-10-04 09:56:04,304 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.0s Time 5.6s impTime 12 [2018-10-04 09:56:04,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-10-04 09:56:04,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2018-10-04 09:56:04,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2018-10-04 09:56:04,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 162 transitions. [2018-10-04 09:56:04,309 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 162 transitions. Word has length 159 [2018-10-04 09:56:04,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:56:04,309 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 162 transitions. [2018-10-04 09:56:04,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has 160 states. [2018-10-04 09:56:04,310 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 162 transitions. [2018-10-04 09:56:04,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-10-04 09:56:04,310 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:56:04,311 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 1, 1] [2018-10-04 09:56:04,311 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:56:04,311 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:56:04,311 INFO L82 PathProgramCache]: Analyzing trace with hash -335638338, now seen corresponding path program 79 times [2018-10-04 09:56:04,311 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:56:04,311 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:56:04,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:56:04,312 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:56:04,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:56:04,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:56:04,578 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:56:05,040 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:56:05,701 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:56:06,793 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:56:07,678 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:56:07,678 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:56:07,679 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:56:07,687 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:56:07,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:56:07,730 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:56:08,051 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:56:08,756 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:56:09,649 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 28 new depth: 9 [2018-10-04 09:56:10,890 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 28 new depth: 9 [2018-10-04 09:56:11,268 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:56:11,288 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:56:11,288 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 160 [2018-10-04 09:56:11,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 162 states [2018-10-04 09:56:11,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2018-10-04 09:56:11,290 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:56:11,290 INFO L87 Difference]: Start difference. First operand 162 states and 162 transitions. Second operand 162 states. [2018-10-04 09:56:11,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:56:11,842 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-10-04 09:56:11,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-04 09:56:11,843 INFO L78 Accepts]: Start accepts. Automaton has 162 states. Word has length 161 [2018-10-04 09:56:11,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:56:11,843 INFO L225 Difference]: With dead ends: 165 [2018-10-04 09:56:11,844 INFO L226 Difference]: Without dead ends: 164 [2018-10-04 09:56:11,844 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.2s Time 5.8s impTime 15 [2018-10-04 09:56:11,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-10-04 09:56:11,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2018-10-04 09:56:11,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-10-04 09:56:11,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 164 transitions. [2018-10-04 09:56:11,849 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 164 transitions. Word has length 161 [2018-10-04 09:56:11,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:56:11,849 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 164 transitions. [2018-10-04 09:56:11,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has 162 states. [2018-10-04 09:56:11,849 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 164 transitions. [2018-10-04 09:56:11,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-10-04 09:56:11,850 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:56:11,850 INFO L375 BasicCegarLoop]: trace histogram [81, 80, 1, 1] [2018-10-04 09:56:11,850 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:56:11,850 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:56:11,851 INFO L82 PathProgramCache]: Analyzing trace with hash -425894528, now seen corresponding path program 80 times [2018-10-04 09:56:11,851 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:56:11,851 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:56:11,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:56:11,852 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:56:11,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:56:11,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:56:12,074 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:56:12,496 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:56:13,004 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:56:14,090 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:56:15,053 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:56:15,054 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:56:15,054 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:56:15,061 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:56:15,101 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:56:15,101 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:56:15,104 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:56:15,449 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:56:16,217 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:56:17,129 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 28 new depth: 9 [2018-10-04 09:56:18,344 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 28 new depth: 9 [2018-10-04 09:56:18,797 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:56:18,816 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:56:18,816 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 162 [2018-10-04 09:56:18,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 164 states [2018-10-04 09:56:18,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2018-10-04 09:56:18,818 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:56:18,818 INFO L87 Difference]: Start difference. First operand 164 states and 164 transitions. Second operand 164 states. Received shutdown request... [2018-10-04 09:56:18,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 09:56:18,840 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-04 09:56:18,845 WARN L205 ceAbstractionStarter]: Timeout [2018-10-04 09:56:18,845 INFO L202 PluginConnector]: Adding new model MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.10 09:56:18 BoogieIcfgContainer [2018-10-04 09:56:18,845 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-04 09:56:18,846 INFO L168 Benchmark]: Toolchain (without parser) took 237536.87 ms. Allocated memory was 1.6 GB in the beginning and 1.5 GB in the end (delta: -26.2 MB). Free memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: 398.7 MB). Peak memory consumption was 372.5 MB. Max. memory is 7.1 GB. [2018-10-04 09:56:18,848 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 09:56:18,849 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.96 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 09:56:18,849 INFO L168 Benchmark]: Boogie Preprocessor took 25.17 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 09:56:18,850 INFO L168 Benchmark]: RCFGBuilder took 297.19 ms. Allocated memory is still 1.6 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-04 09:56:18,850 INFO L168 Benchmark]: TraceAbstraction took 237165.32 ms. Allocated memory was 1.6 GB in the beginning and 1.5 GB in the end (delta: -26.2 MB). Free memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: 377.6 MB). Peak memory consumption was 351.4 MB. Max. memory is 7.1 GB. [2018-10-04 09:56:18,854 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 0.21 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 41.96 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.17 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 297.19 ms. Allocated memory is still 1.6 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 237165.32 ms. Allocated memory was 1.6 GB in the beginning and 1.5 GB in the end (delta: -26.2 MB). Free memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: 377.6 MB). Peak memory consumption was 351.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 25]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 25). Cancelled while BasicCegarLoop was constructing difference of abstraction (164states) and FLOYD_HOARE automaton (currently 6 states, 164 states before enhancement), while ReachableStatesComputation was computing reachable states (7 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 237.0s OverallTime, 81 OverallIterations, 81 TraceHistogramMax, 21.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 163 SDtfs, 0 SDslu, 1 SDs, 0 SdLazy, 13415 SolverSat, 232 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 13.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9961 GetRequests, 3320 SyntacticMatches, 0 SemanticMatches, 6641 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 185.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=164occurred in iteration=80, 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: 0.3s AutomataMinimizationTime, 80 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 3.9s SatisfiabilityAnalysisTime, 207.0s InterpolantComputationTime, 13443 NumberOfCodeBlocks, 13443 NumberOfCodeBlocksAsserted, 1774 NumberOfCheckSat, 13282 ConstructedInterpolants, 0 QuantifiedInterpolants, 8661140 SizeOfPredicates, 0 NumberOfNonLiveVariables, 13600 ConjunctsInSsa, 3480 ConjunctsInUnsatCore, 161 InterpolantComputations, 1 PerfectInterpolantSequences, 0/354240 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/MonadicInvariant01.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-04_09-56-18-869.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/MonadicInvariant01.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-04_09-56-18-869.csv Completed graceful shutdown