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/LexIndexValue-Pointer-Reduced.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-133090d [2018-10-04 09:50:28,282 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-04 09:50:28,284 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-04 09:50:28,297 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-04 09:50:28,298 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-04 09:50:28,299 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-04 09:50:28,300 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-04 09:50:28,302 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-04 09:50:28,303 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-04 09:50:28,304 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-04 09:50:28,305 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-04 09:50:28,305 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-04 09:50:28,306 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-04 09:50:28,307 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-04 09:50:28,308 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-04 09:50:28,309 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-04 09:50:28,310 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-04 09:50:28,312 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-04 09:50:28,313 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-04 09:50:28,315 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-04 09:50:28,316 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-04 09:50:28,317 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-04 09:50:28,320 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-04 09:50:28,328 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 09:50:28,343 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-04 09:50:28,344 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-04 09:50:28,345 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-04 09:50:28,345 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-04 09:50:28,345 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-04 09:50:28,346 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-04 09:50:28,346 INFO L133 SettingsManager]: * Use SBE=true [2018-10-04 09:50:28,346 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-04 09:50:28,346 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-04 09:50:28,346 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-04 09:50:28,347 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-04 09:50:28,347 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-04 09:50:28,347 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-04 09:50:28,347 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-04 09:50:28,347 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-04 09:50:28,347 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-04 09:50:28,348 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-04 09:50:28,348 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-04 09:50:28,348 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-04 09:50:28,348 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-04 09:50:28,348 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-04 09:50:28,349 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-04 09:50:28,349 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 09:50:28,349 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-04 09:50:28,349 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-04 09:50:28,349 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-04 09:50:28,350 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-04 09:50:28,350 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-04 09:50:28,350 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-04 09:50:28,350 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-04 09:50:28,350 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-10-04 09:50:28,403 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-04 09:50:28,423 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-04 09:50:28,430 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-04 09:50:28,432 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-04 09:50:28,432 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-04 09:50:28,433 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/LexIndexValue-Pointer-Reduced.bpl [2018-10-04 09:50:28,433 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/LexIndexValue-Pointer-Reduced.bpl' [2018-10-04 09:50:28,484 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-04 09:50:28,486 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-04 09:50:28,487 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-04 09:50:28,487 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-04 09:50:28,487 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-04 09:50:28,511 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:50:28" (1/1) ... [2018-10-04 09:50:28,523 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:50:28" (1/1) ... [2018-10-04 09:50:28,528 WARN L165 Inliner]: Program contained no entry procedure! [2018-10-04 09:50:28,529 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-10-04 09:50:28,529 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-10-04 09:50:28,531 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-04 09:50:28,532 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-04 09:50:28,533 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-04 09:50:28,533 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-04 09:50:28,544 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:50:28" (1/1) ... [2018-10-04 09:50:28,545 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:50:28" (1/1) ... [2018-10-04 09:50:28,545 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:50:28" (1/1) ... [2018-10-04 09:50:28,546 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:50:28" (1/1) ... [2018-10-04 09:50:28,550 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:50:28" (1/1) ... [2018-10-04 09:50:28,557 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:50:28" (1/1) ... [2018-10-04 09:50:28,558 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:50:28" (1/1) ... [2018-10-04 09:50:28,559 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-04 09:50:28,560 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-04 09:50:28,560 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-04 09:50:28,560 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-04 09:50:28,562 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:50:28" (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 09:50:28,639 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-04 09:50:28,640 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-04 09:50:28,846 INFO L338 CfgBuilder]: Using library mode [2018-10-04 09:50:28,847 INFO L202 PluginConnector]: Adding new model LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 09:50:28 BoogieIcfgContainer [2018-10-04 09:50:28,847 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-04 09:50:28,848 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-04 09:50:28,848 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-04 09:50:28,851 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-04 09:50:28,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:50:28" (1/2) ... [2018-10-04 09:50:28,853 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72e9853a and model type LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 09:50:28, skipping insertion in model container [2018-10-04 09:50:28,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 09:50:28" (2/2) ... [2018-10-04 09:50:28,855 INFO L112 eAbstractionObserver]: Analyzing ICFG LexIndexValue-Pointer-Reduced.bpl [2018-10-04 09:50:28,863 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-04 09:50:28,871 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-04 09:50:28,917 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-04 09:50:28,918 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-04 09:50:28,918 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-04 09:50:28,919 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-04 09:50:28,919 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-04 09:50:28,919 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-04 09:50:28,919 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-04 09:50:28,919 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-04 09:50:28,920 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-04 09:50:28,934 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-10-04 09:50:28,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-10-04 09:50:28,941 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:50:28,942 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-10-04 09:50:28,943 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:50:28,951 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:50:28,951 INFO L82 PathProgramCache]: Analyzing trace with hash 29920, now seen corresponding path program 1 times [2018-10-04 09:50:28,954 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:50:28,954 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:50:29,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:29,005 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:50:29,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:29,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:50:29,093 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 09:50:29,095 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 09:50:29,095 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-10-04 09:50:29,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-04 09:50:29,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-04 09:50:29,113 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:50:29,115 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-10-04 09:50:29,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:50:29,186 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-04 09:50:29,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-04 09:50:29,188 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-10-04 09:50:29,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:50:29,208 INFO L225 Difference]: With dead ends: 11 [2018-10-04 09:50:29,208 INFO L226 Difference]: Without dead ends: 6 [2018-10-04 09:50:29,213 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 09:50:29,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-10-04 09:50:29,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-10-04 09:50:29,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-10-04 09:50:29,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-10-04 09:50:29,300 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 3 [2018-10-04 09:50:29,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:50:29,301 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-10-04 09:50:29,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-04 09:50:29,301 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-10-04 09:50:29,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-04 09:50:29,302 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:50:29,302 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-10-04 09:50:29,302 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:50:29,302 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:50:29,302 INFO L82 PathProgramCache]: Analyzing trace with hash 28754210, now seen corresponding path program 1 times [2018-10-04 09:50:29,303 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:50:29,303 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:50:29,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:29,304 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:50:29,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:29,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:50:29,401 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 09:50:29,402 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:50:29,402 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 09:50:29,419 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:50:29,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:50:29,442 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:50:29,652 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 09:50:29,684 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:50:29,684 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2018-10-04 09:50:29,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-04 09:50:29,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-04 09:50:29,686 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:50:29,686 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 6 states. [2018-10-04 09:50:29,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:50:29,851 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-10-04 09:50:29,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-04 09:50:29,852 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2018-10-04 09:50:29,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:50:29,852 INFO L225 Difference]: With dead ends: 9 [2018-10-04 09:50:29,852 INFO L226 Difference]: Without dead ends: 8 [2018-10-04 09:50:29,853 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 4 [2018-10-04 09:50:29,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-04 09:50:29,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-10-04 09:50:29,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-04 09:50:29,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-10-04 09:50:29,856 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 5 [2018-10-04 09:50:29,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:50:29,857 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-10-04 09:50:29,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-04 09:50:29,857 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-10-04 09:50:29,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-04 09:50:29,857 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:50:29,858 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1] [2018-10-04 09:50:29,858 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:50:29,858 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:50:29,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1862993124, now seen corresponding path program 2 times [2018-10-04 09:50:29,859 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:50:29,859 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:50:29,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:29,860 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:50:29,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:29,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:50:30,015 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 09:50:30,015 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:50:30,015 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:50:30,025 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:50:30,041 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:50:30,041 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:50:30,045 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:50:30,125 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 09:50:30,145 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:50:30,145 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2018-10-04 09:50:30,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 09:50:30,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 09:50:30,146 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:50:30,146 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 8 states. [2018-10-04 09:50:30,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:50:30,246 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-04 09:50:30,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 09:50:30,246 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2018-10-04 09:50:30,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:50:30,247 INFO L225 Difference]: With dead ends: 11 [2018-10-04 09:50:30,247 INFO L226 Difference]: Without dead ends: 10 [2018-10-04 09:50:30,248 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 5 [2018-10-04 09:50:30,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-04 09:50:30,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-04 09:50:30,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-04 09:50:30,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-10-04 09:50:30,251 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2018-10-04 09:50:30,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:50:30,252 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-10-04 09:50:30,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 09:50:30,252 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-10-04 09:50:30,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-04 09:50:30,253 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:50:30,253 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1] [2018-10-04 09:50:30,253 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:50:30,253 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:50:30,254 INFO L82 PathProgramCache]: Analyzing trace with hash -664969178, now seen corresponding path program 3 times [2018-10-04 09:50:30,254 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:50:30,254 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:50:30,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:30,255 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:50:30,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:30,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:50:30,559 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 09:50:30,560 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:50:30,560 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 09:50:30,568 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:50:30,596 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-04 09:50:30,596 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:50:30,597 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:50:30,711 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 09:50:30,733 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:50:30,733 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2018-10-04 09:50:30,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:50:30,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:50:30,734 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:50:30,734 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 10 states. [2018-10-04 09:50:30,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:50:30,781 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-10-04 09:50:30,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 09:50:30,781 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2018-10-04 09:50:30,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:50:30,782 INFO L225 Difference]: With dead ends: 13 [2018-10-04 09:50:30,782 INFO L226 Difference]: Without dead ends: 12 [2018-10-04 09:50:30,783 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 09:50:30,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-04 09:50:30,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-04 09:50:30,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-04 09:50:30,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-10-04 09:50:30,792 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2018-10-04 09:50:30,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:50:30,793 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-10-04 09:50:30,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:50:30,793 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-10-04 09:50:30,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-04 09:50:30,794 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:50:30,794 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1] [2018-10-04 09:50:30,794 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:50:30,794 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:50:30,795 INFO L82 PathProgramCache]: Analyzing trace with hash 914748136, now seen corresponding path program 4 times [2018-10-04 09:50:30,795 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:50:30,795 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:50:30,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:30,797 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:50:30,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:30,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:50:31,041 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 09:50:31,041 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:50:31,041 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 09:50:31,052 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:50:31,058 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:50:31,059 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:50:31,060 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:50:31,182 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 09:50:31,202 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:50:31,202 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2018-10-04 09:50:31,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-04 09:50:31,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-04 09:50:31,204 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:50:31,204 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 12 states. [2018-10-04 09:50:31,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:50:31,265 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-10-04 09:50:31,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 09:50:31,266 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2018-10-04 09:50:31,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:50:31,267 INFO L225 Difference]: With dead ends: 15 [2018-10-04 09:50:31,268 INFO L226 Difference]: Without dead ends: 14 [2018-10-04 09:50:31,268 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.2s impTime 7 [2018-10-04 09:50:31,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-04 09:50:31,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-04 09:50:31,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-04 09:50:31,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-04 09:50:31,272 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2018-10-04 09:50:31,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:50:31,272 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-04 09:50:31,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-04 09:50:31,273 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-04 09:50:31,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-04 09:50:31,273 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:50:31,273 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1] [2018-10-04 09:50:31,274 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:50:31,274 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:50:31,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1395335894, now seen corresponding path program 5 times [2018-10-04 09:50:31,274 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:50:31,274 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:50:31,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:31,275 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:50:31,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:31,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:50:31,510 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 09:50:31,510 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:50:31,511 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:50:31,531 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:50:31,614 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-04 09:50:31,614 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:50:31,616 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:50:32,010 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 09:50:32,032 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:50:32,032 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2018-10-04 09:50:32,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 09:50:32,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 09:50:32,033 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:50:32,033 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 14 states. [2018-10-04 09:50:32,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:50:32,134 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-04 09:50:32,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 09:50:32,134 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-10-04 09:50:32,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:50:32,135 INFO L225 Difference]: With dead ends: 17 [2018-10-04 09:50:32,135 INFO L226 Difference]: Without dead ends: 16 [2018-10-04 09:50:32,135 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 8 [2018-10-04 09:50:32,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-04 09:50:32,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-04 09:50:32,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-04 09:50:32,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-10-04 09:50:32,139 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2018-10-04 09:50:32,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:50:32,140 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-10-04 09:50:32,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 09:50:32,140 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-10-04 09:50:32,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:50:32,141 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:50:32,141 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1] [2018-10-04 09:50:32,141 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:50:32,141 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:50:32,142 INFO L82 PathProgramCache]: Analyzing trace with hash -887996692, now seen corresponding path program 6 times [2018-10-04 09:50:32,142 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:50:32,142 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:50:32,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:32,143 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:50:32,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:32,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:50:32,254 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 09:50:32,254 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:50:32,255 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 09:50:32,269 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:50:32,277 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-04 09:50:32,277 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:50:32,279 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:50:32,396 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 09:50:32,425 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:50:32,425 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2018-10-04 09:50:32,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-04 09:50:32,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-04 09:50:32,426 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:50:32,426 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 16 states. [2018-10-04 09:50:32,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:50:32,494 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-04 09:50:32,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:50:32,494 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 15 [2018-10-04 09:50:32,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:50:32,495 INFO L225 Difference]: With dead ends: 19 [2018-10-04 09:50:32,495 INFO L226 Difference]: Without dead ends: 18 [2018-10-04 09:50:32,495 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 9 [2018-10-04 09:50:32,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-04 09:50:32,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-04 09:50:32,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-04 09:50:32,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-04 09:50:32,500 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2018-10-04 09:50:32,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:50:32,500 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-04 09:50:32,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-04 09:50:32,500 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-04 09:50:32,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:50:32,501 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:50:32,501 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1] [2018-10-04 09:50:32,501 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:50:32,502 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:50:32,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1333671982, now seen corresponding path program 7 times [2018-10-04 09:50:32,502 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:50:32,502 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:50:32,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:32,503 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:50:32,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:32,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:50:32,648 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 09:50:32,649 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:50:32,649 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:50:32,657 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:50:32,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:50:32,666 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:50:32,974 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 09:50:32,998 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:50:32,998 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2018-10-04 09:50:32,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-04 09:50:32,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-04 09:50:32,999 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:50:32,999 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 18 states. [2018-10-04 09:50:33,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:50:33,074 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-04 09:50:33,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:50:33,074 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 17 [2018-10-04 09:50:33,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:50:33,076 INFO L225 Difference]: With dead ends: 21 [2018-10-04 09:50:33,076 INFO L226 Difference]: Without dead ends: 20 [2018-10-04 09:50:33,076 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 10 [2018-10-04 09:50:33,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-04 09:50:33,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-04 09:50:33,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-04 09:50:33,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-10-04 09:50:33,081 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2018-10-04 09:50:33,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:50:33,081 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-10-04 09:50:33,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-04 09:50:33,081 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-10-04 09:50:33,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:50:33,082 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:50:33,082 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1] [2018-10-04 09:50:33,082 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:50:33,083 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:50:33,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1758521584, now seen corresponding path program 8 times [2018-10-04 09:50:33,083 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:50:33,083 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:50:33,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:33,084 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:50:33,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:33,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:50:33,238 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 09:50:33,239 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:50:33,239 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:50:33,247 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:50:33,255 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:50:33,255 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:50:33,258 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:50:33,389 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 09:50:33,409 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:50:33,410 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2018-10-04 09:50:33,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 09:50:33,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 09:50:33,411 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:50:33,411 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 20 states. [2018-10-04 09:50:33,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:50:33,469 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-04 09:50:33,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:50:33,470 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 19 [2018-10-04 09:50:33,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:50:33,471 INFO L225 Difference]: With dead ends: 23 [2018-10-04 09:50:33,471 INFO L226 Difference]: Without dead ends: 22 [2018-10-04 09:50:33,472 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 09:50:33,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-04 09:50:33,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-04 09:50:33,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-04 09:50:33,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-10-04 09:50:33,476 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2018-10-04 09:50:33,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:50:33,477 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-10-04 09:50:33,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 09:50:33,477 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-10-04 09:50:33,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-04 09:50:33,478 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:50:33,478 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1] [2018-10-04 09:50:33,478 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:50:33,478 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:50:33,478 INFO L82 PathProgramCache]: Analyzing trace with hash 2017095986, now seen corresponding path program 9 times [2018-10-04 09:50:33,478 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:50:33,478 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:50:33,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:33,479 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:50:33,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:33,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:50:33,639 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 09:50:33,640 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:50:33,640 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 09:50:33,649 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:50:33,662 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-04 09:50:33,662 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:50:33,664 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:50:33,938 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 09:50:33,959 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:50:33,959 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2018-10-04 09:50:33,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-04 09:50:33,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-04 09:50:33,960 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:50:33,960 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 22 states. [2018-10-04 09:50:34,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:50:34,202 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-04 09:50:34,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-04 09:50:34,203 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2018-10-04 09:50:34,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:50:34,203 INFO L225 Difference]: With dead ends: 25 [2018-10-04 09:50:34,203 INFO L226 Difference]: Without dead ends: 24 [2018-10-04 09:50:34,204 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.2s impTime 12 [2018-10-04 09:50:34,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-04 09:50:34,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-04 09:50:34,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-04 09:50:34,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-10-04 09:50:34,209 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2018-10-04 09:50:34,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:50:34,209 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-10-04 09:50:34,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-04 09:50:34,209 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-10-04 09:50:34,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-04 09:50:34,210 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:50:34,210 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1] [2018-10-04 09:50:34,211 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:50:34,211 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:50:34,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1398993140, now seen corresponding path program 10 times [2018-10-04 09:50:34,211 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:50:34,211 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:50:34,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:34,212 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:50:34,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:34,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:50:34,345 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 09:50:34,346 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:50:34,346 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:50:34,354 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:50:34,366 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:50:34,366 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:50:34,368 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:50:34,527 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 09:50:34,548 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:50:34,548 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2018-10-04 09:50:34,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-04 09:50:34,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-04 09:50:34,549 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:50:34,550 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 24 states. [2018-10-04 09:50:34,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:50:34,614 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-04 09:50:34,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-04 09:50:34,615 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 23 [2018-10-04 09:50:34,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:50:34,616 INFO L225 Difference]: With dead ends: 27 [2018-10-04 09:50:34,616 INFO L226 Difference]: Without dead ends: 26 [2018-10-04 09:50:34,617 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 09:50:34,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-04 09:50:34,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-10-04 09:50:34,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-04 09:50:34,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-10-04 09:50:34,622 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 23 [2018-10-04 09:50:34,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:50:34,622 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-10-04 09:50:34,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-04 09:50:34,623 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-10-04 09:50:34,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-04 09:50:34,624 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:50:34,624 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1] [2018-10-04 09:50:34,624 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:50:34,624 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:50:34,624 INFO L82 PathProgramCache]: Analyzing trace with hash 107644982, now seen corresponding path program 11 times [2018-10-04 09:50:34,624 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:50:34,624 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:50:34,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:34,625 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:50:34,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:34,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:50:34,870 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 09:50:34,870 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:50:34,871 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:50:34,878 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:50:34,984 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-04 09:50:34,984 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:50:34,986 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:50:35,480 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 09:50:35,501 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:50:35,502 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2018-10-04 09:50:35,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-04 09:50:35,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-04 09:50:35,503 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:50:35,503 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 26 states. [2018-10-04 09:50:35,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:50:35,568 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-04 09:50:35,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-04 09:50:35,568 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 25 [2018-10-04 09:50:35,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:50:35,569 INFO L225 Difference]: With dead ends: 29 [2018-10-04 09:50:35,569 INFO L226 Difference]: Without dead ends: 28 [2018-10-04 09:50:35,570 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.4s impTime 14 [2018-10-04 09:50:35,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-04 09:50:35,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-10-04 09:50:35,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 09:50:35,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-10-04 09:50:35,575 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 25 [2018-10-04 09:50:35,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:50:35,576 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-10-04 09:50:35,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-04 09:50:35,576 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-10-04 09:50:35,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-04 09:50:35,577 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:50:35,577 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1] [2018-10-04 09:50:35,577 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:50:35,577 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:50:35,577 INFO L82 PathProgramCache]: Analyzing trace with hash 367613688, now seen corresponding path program 12 times [2018-10-04 09:50:35,578 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:50:35,578 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:50:35,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:35,579 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:50:35,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:35,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:50:35,921 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 09:50:35,922 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:50:35,922 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:50:35,936 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:50:35,991 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-04 09:50:35,991 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:50:35,993 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:50:36,209 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 09:50:36,231 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:50:36,231 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 26 [2018-10-04 09:50:36,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-04 09:50:36,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-04 09:50:36,232 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:50:36,232 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 28 states. [2018-10-04 09:50:36,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:50:36,340 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-04 09:50:36,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-04 09:50:36,341 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 27 [2018-10-04 09:50:36,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:50:36,342 INFO L225 Difference]: With dead ends: 31 [2018-10-04 09:50:36,342 INFO L226 Difference]: Without dead ends: 30 [2018-10-04 09:50:36,342 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 15 [2018-10-04 09:50:36,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-04 09:50:36,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-04 09:50:36,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:50:36,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-10-04 09:50:36,347 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 27 [2018-10-04 09:50:36,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:50:36,347 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-10-04 09:50:36,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-04 09:50:36,348 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-10-04 09:50:36,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-04 09:50:36,348 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:50:36,348 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1] [2018-10-04 09:50:36,349 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:50:36,349 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:50:36,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1089436986, now seen corresponding path program 13 times [2018-10-04 09:50:36,349 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:50:36,349 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:50:36,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:36,350 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:50:36,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:36,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:50:36,598 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 09:50:36,598 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:50:36,599 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 09:50:36,607 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:50:36,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:50:36,618 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:50:36,960 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 09:50:36,980 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:50:36,980 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2018-10-04 09:50:36,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-04 09:50:36,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-04 09:50:36,981 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:50:36,982 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 30 states. [2018-10-04 09:50:37,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:50:37,121 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-04 09:50:37,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-04 09:50:37,122 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 29 [2018-10-04 09:50:37,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:50:37,123 INFO L225 Difference]: With dead ends: 33 [2018-10-04 09:50:37,123 INFO L226 Difference]: Without dead ends: 32 [2018-10-04 09:50:37,124 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 09:50:37,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-04 09:50:37,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-10-04 09:50:37,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:50:37,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-10-04 09:50:37,129 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 29 [2018-10-04 09:50:37,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:50:37,129 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-10-04 09:50:37,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-04 09:50:37,129 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-10-04 09:50:37,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-04 09:50:37,130 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:50:37,130 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1] [2018-10-04 09:50:37,130 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:50:37,130 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:50:37,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1023075588, now seen corresponding path program 14 times [2018-10-04 09:50:37,131 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:50:37,131 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:50:37,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:37,132 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:50:37,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:37,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:50:37,349 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 09:50:37,350 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:50:37,350 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 09:50:37,360 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:50:37,377 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:50:37,377 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:50:37,379 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:50:37,822 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 09:50:37,842 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:50:37,843 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2018-10-04 09:50:37,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-04 09:50:37,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-04 09:50:37,844 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:50:37,844 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 32 states. [2018-10-04 09:50:37,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:50:37,967 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-10-04 09:50:37,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-04 09:50:37,967 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 31 [2018-10-04 09:50:37,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:50:37,968 INFO L225 Difference]: With dead ends: 35 [2018-10-04 09:50:37,968 INFO L226 Difference]: Without dead ends: 34 [2018-10-04 09:50:37,969 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.3s impTime 17 [2018-10-04 09:50:37,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-04 09:50:37,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-10-04 09:50:37,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:50:37,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-10-04 09:50:37,973 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 31 [2018-10-04 09:50:37,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:50:37,974 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-10-04 09:50:37,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-04 09:50:37,974 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-10-04 09:50:37,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-04 09:50:37,975 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:50:37,975 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1] [2018-10-04 09:50:37,975 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:50:37,975 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:50:37,975 INFO L82 PathProgramCache]: Analyzing trace with hash 371871806, now seen corresponding path program 15 times [2018-10-04 09:50:37,975 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:50:37,976 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:50:37,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:37,976 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:50:37,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:37,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:50:38,263 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 09:50:38,264 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:50:38,264 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:50:38,273 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:50:38,438 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-04 09:50:38,438 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:50:38,440 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:50:39,313 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 09:50:39,334 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:50:39,334 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 32 [2018-10-04 09:50:39,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-04 09:50:39,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-04 09:50:39,335 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:50:39,335 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 34 states. [2018-10-04 09:50:39,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:50:39,465 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-04 09:50:39,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-04 09:50:39,466 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 33 [2018-10-04 09:50:39,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:50:39,467 INFO L225 Difference]: With dead ends: 37 [2018-10-04 09:50:39,467 INFO L226 Difference]: Without dead ends: 36 [2018-10-04 09:50:39,467 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.7s impTime 18 [2018-10-04 09:50:39,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-04 09:50:39,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-10-04 09:50:39,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-04 09:50:39,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-10-04 09:50:39,472 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 33 [2018-10-04 09:50:39,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:50:39,472 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-10-04 09:50:39,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-04 09:50:39,473 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-10-04 09:50:39,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-04 09:50:39,474 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:50:39,474 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1] [2018-10-04 09:50:39,474 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:50:39,474 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:50:39,474 INFO L82 PathProgramCache]: Analyzing trace with hash 886521088, now seen corresponding path program 16 times [2018-10-04 09:50:39,474 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:50:39,475 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:50:39,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:39,475 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:50:39,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:39,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:50:39,690 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 09:50:39,691 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:50:39,691 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 09:50:39,699 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:50:39,710 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:50:39,710 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:50:39,711 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:50:39,969 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 09:50:39,989 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:50:39,989 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 34 [2018-10-04 09:50:39,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-04 09:50:39,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-04 09:50:39,990 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:50:39,990 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 36 states. [2018-10-04 09:50:40,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:50:40,125 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-04 09:50:40,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-04 09:50:40,125 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 35 [2018-10-04 09:50:40,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:50:40,126 INFO L225 Difference]: With dead ends: 39 [2018-10-04 09:50:40,126 INFO L226 Difference]: Without dead ends: 38 [2018-10-04 09:50:40,127 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 09:50:40,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-04 09:50:40,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-10-04 09:50:40,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-04 09:50:40,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-10-04 09:50:40,131 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 35 [2018-10-04 09:50:40,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:50:40,131 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-10-04 09:50:40,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-04 09:50:40,132 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-10-04 09:50:40,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-04 09:50:40,132 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:50:40,132 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1] [2018-10-04 09:50:40,133 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:50:40,133 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:50:40,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1543242050, now seen corresponding path program 17 times [2018-10-04 09:50:40,133 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:50:40,133 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:50:40,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:40,134 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:50:40,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:40,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:50:40,484 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 09:50:40,484 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:50:40,484 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 09:50:40,495 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:50:40,585 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-04 09:50:40,586 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:50:40,588 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:50:40,817 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 09:50:40,837 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:50:40,837 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 36 [2018-10-04 09:50:40,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-04 09:50:40,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-04 09:50:40,838 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:50:40,838 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 38 states. [2018-10-04 09:50:40,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:50:40,992 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-10-04 09:50:40,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-04 09:50:40,992 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 37 [2018-10-04 09:50:40,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:50:40,993 INFO L225 Difference]: With dead ends: 41 [2018-10-04 09:50:40,993 INFO L226 Difference]: Without dead ends: 40 [2018-10-04 09:50:40,993 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.4s impTime 20 [2018-10-04 09:50:40,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-04 09:50:40,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-10-04 09:50:40,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-04 09:50:40,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-10-04 09:50:40,999 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 37 [2018-10-04 09:50:40,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:50:40,999 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-10-04 09:50:40,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-04 09:50:40,999 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-10-04 09:50:41,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-04 09:50:41,000 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:50:41,000 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1] [2018-10-04 09:50:41,000 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:50:41,000 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:50:41,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1291894020, now seen corresponding path program 18 times [2018-10-04 09:50:41,001 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:50:41,001 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:50:41,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:41,001 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:50:41,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:41,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:50:41,496 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:50:41,499 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 09:50:41,499 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:50:41,499 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:50:41,506 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:50:41,522 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-04 09:50:41,523 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:50:41,524 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:50:41,846 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:50:41,903 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 09:50:41,924 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:50:41,925 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 38 [2018-10-04 09:50:41,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-04 09:50:41,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-04 09:50:41,926 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:50:41,926 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 40 states. [2018-10-04 09:50:42,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:50:42,021 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-04 09:50:42,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-04 09:50:42,022 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 39 [2018-10-04 09:50:42,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:50:42,023 INFO L225 Difference]: With dead ends: 43 [2018-10-04 09:50:42,023 INFO L226 Difference]: Without dead ends: 42 [2018-10-04 09:50:42,023 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.4s impTime 8 [2018-10-04 09:50:42,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-04 09:50:42,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-10-04 09:50:42,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-04 09:50:42,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-10-04 09:50:42,027 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 39 [2018-10-04 09:50:42,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:50:42,028 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-10-04 09:50:42,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-04 09:50:42,028 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-10-04 09:50:42,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-04 09:50:42,029 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:50:42,029 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1] [2018-10-04 09:50:42,029 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:50:42,029 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:50:42,029 INFO L82 PathProgramCache]: Analyzing trace with hash 264605766, now seen corresponding path program 19 times [2018-10-04 09:50:42,029 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:50:42,029 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:50:42,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:42,030 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:50:42,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:42,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:50:42,295 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:50:42,317 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 09:50:42,317 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:50:42,317 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:50:42,325 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:50:42,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:50:42,340 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:50:42,631 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:50:42,700 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 09:50:42,720 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:50:42,720 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 40 [2018-10-04 09:50:42,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-04 09:50:42,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-04 09:50:42,721 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:50:42,721 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 42 states. [2018-10-04 09:50:42,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:50:42,819 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-10-04 09:50:42,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-04 09:50:42,820 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 41 [2018-10-04 09:50:42,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:50:42,821 INFO L225 Difference]: With dead ends: 45 [2018-10-04 09:50:42,821 INFO L226 Difference]: Without dead ends: 44 [2018-10-04 09:50:42,821 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 9 [2018-10-04 09:50:42,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-04 09:50:42,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-10-04 09:50:42,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-04 09:50:42,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-10-04 09:50:42,827 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 41 [2018-10-04 09:50:42,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:50:42,827 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-10-04 09:50:42,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-04 09:50:42,827 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-10-04 09:50:42,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-04 09:50:42,828 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:50:42,828 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1] [2018-10-04 09:50:42,829 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:50:42,829 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:50:42,829 INFO L82 PathProgramCache]: Analyzing trace with hash 883071752, now seen corresponding path program 20 times [2018-10-04 09:50:42,829 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:50:42,829 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:50:42,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:42,830 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:50:42,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:42,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:50:43,201 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:50:43,247 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 09:50:43,248 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:50:43,248 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:50:43,256 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:50:43,268 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:50:43,269 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:50:43,271 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:50:43,589 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:50:43,730 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 09:50:43,753 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:50:43,753 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 42 [2018-10-04 09:50:43,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-04 09:50:43,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-04 09:50:43,754 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:50:43,754 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 44 states. [2018-10-04 09:50:43,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:50:43,860 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-10-04 09:50:43,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-04 09:50:43,861 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 43 [2018-10-04 09:50:43,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:50:43,861 INFO L225 Difference]: With dead ends: 47 [2018-10-04 09:50:43,862 INFO L226 Difference]: Without dead ends: 46 [2018-10-04 09:50:43,862 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.5s impTime 10 [2018-10-04 09:50:43,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-04 09:50:43,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-10-04 09:50:43,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-04 09:50:43,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-10-04 09:50:43,868 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 43 [2018-10-04 09:50:43,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:50:43,868 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-10-04 09:50:43,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-04 09:50:43,868 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-10-04 09:50:43,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-10-04 09:50:43,869 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:50:43,869 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1] [2018-10-04 09:50:43,870 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:50:43,870 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:50:43,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1771569846, now seen corresponding path program 21 times [2018-10-04 09:50:43,870 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:50:43,870 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:50:43,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:43,871 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:50:43,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:43,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:50:44,156 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:50:44,223 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 09:50:44,224 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:50:44,224 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 09:50:44,232 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:50:44,251 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-10-04 09:50:44,251 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:50:44,253 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:50:45,411 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:50:45,585 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 09:50:45,605 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:50:45,605 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 44 [2018-10-04 09:50:45,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-04 09:50:45,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-04 09:50:45,606 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:50:45,606 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 46 states. [2018-10-04 09:50:45,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:50:45,747 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-04 09:50:45,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-04 09:50:45,750 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 45 [2018-10-04 09:50:45,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:50:45,751 INFO L225 Difference]: With dead ends: 49 [2018-10-04 09:50:45,751 INFO L226 Difference]: Without dead ends: 48 [2018-10-04 09:50:45,751 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 1.1s impTime 11 [2018-10-04 09:50:45,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-04 09:50:45,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-10-04 09:50:45,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-04 09:50:45,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-10-04 09:50:45,756 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 45 [2018-10-04 09:50:45,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:50:45,757 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-10-04 09:50:45,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-04 09:50:45,757 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-10-04 09:50:45,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-04 09:50:45,757 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:50:45,758 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1] [2018-10-04 09:50:45,758 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:50:45,758 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:50:45,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1671571700, now seen corresponding path program 22 times [2018-10-04 09:50:45,758 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:50:45,758 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:50:45,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:45,759 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:50:45,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:45,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:50:46,028 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:50:46,072 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 09:50:46,073 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:50:46,073 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:50:46,082 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:50:46,095 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:50:46,095 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:50:46,097 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:50:46,845 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:50:47,387 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 09:50:47,413 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:50:47,413 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2018-10-04 09:50:47,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-04 09:50:47,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-04 09:50:47,414 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:50:47,415 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 48 states. [2018-10-04 09:50:47,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:50:47,564 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-10-04 09:50:47,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-04 09:50:47,565 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 47 [2018-10-04 09:50:47,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:50:47,565 INFO L225 Difference]: With dead ends: 51 [2018-10-04 09:50:47,566 INFO L226 Difference]: Without dead ends: 50 [2018-10-04 09:50:47,566 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 09:50:47,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-04 09:50:47,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-10-04 09:50:47,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-04 09:50:47,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-10-04 09:50:47,571 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 47 [2018-10-04 09:50:47,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:50:47,571 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-10-04 09:50:47,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-04 09:50:47,572 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-10-04 09:50:47,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-04 09:50:47,572 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:50:47,572 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1] [2018-10-04 09:50:47,573 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:50:47,573 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:50:47,573 INFO L82 PathProgramCache]: Analyzing trace with hash -62633906, now seen corresponding path program 23 times [2018-10-04 09:50:47,573 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:50:47,573 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:50:47,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:47,574 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:50:47,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:47,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:50:48,383 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:50:48,439 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 09:50:48,439 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:50:48,439 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:50:48,447 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:50:48,468 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-10-04 09:50:48,468 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:50:48,470 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:50:49,390 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:50:49,627 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 09:50:49,646 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:50:49,647 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 48 [2018-10-04 09:50:49,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-04 09:50:49,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-04 09:50:49,647 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:50:49,648 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 50 states. [2018-10-04 09:50:49,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:50:49,755 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-10-04 09:50:49,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-04 09:50:49,755 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 49 [2018-10-04 09:50:49,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:50:49,756 INFO L225 Difference]: With dead ends: 53 [2018-10-04 09:50:49,756 INFO L226 Difference]: Without dead ends: 52 [2018-10-04 09:50:49,757 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 0.9s impTime 13 [2018-10-04 09:50:49,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-10-04 09:50:49,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-10-04 09:50:49,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-04 09:50:49,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-10-04 09:50:49,762 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 49 [2018-10-04 09:50:49,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:50:49,762 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-10-04 09:50:49,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-04 09:50:49,763 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-10-04 09:50:49,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-04 09:50:49,763 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:50:49,764 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1] [2018-10-04 09:50:49,764 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:50:49,764 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:50:49,764 INFO L82 PathProgramCache]: Analyzing trace with hash -61640432, now seen corresponding path program 24 times [2018-10-04 09:50:49,764 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:50:49,764 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:50:49,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:49,765 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:50:49,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:49,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:50:50,096 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:50:50,237 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 09:50:50,237 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:50:50,237 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 09:50:50,250 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:50:50,284 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-04 09:50:50,284 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:50:50,287 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:50:50,894 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:50:51,073 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 09:50:51,093 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:50:51,093 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 50 [2018-10-04 09:50:51,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-04 09:50:51,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-04 09:50:51,094 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:50:51,094 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 52 states. [2018-10-04 09:50:51,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:50:51,214 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-10-04 09:50:51,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-04 09:50:51,215 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 51 [2018-10-04 09:50:51,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:50:51,216 INFO L225 Difference]: With dead ends: 55 [2018-10-04 09:50:51,216 INFO L226 Difference]: Without dead ends: 54 [2018-10-04 09:50:51,216 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.6s impTime 14 [2018-10-04 09:50:51,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-04 09:50:51,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-10-04 09:50:51,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-04 09:50:51,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-10-04 09:50:51,220 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 51 [2018-10-04 09:50:51,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:50:51,220 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-10-04 09:50:51,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-04 09:50:51,221 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-10-04 09:50:51,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-04 09:50:51,221 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:50:51,221 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1] [2018-10-04 09:50:51,221 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:50:51,222 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:50:51,222 INFO L82 PathProgramCache]: Analyzing trace with hash 893088082, now seen corresponding path program 25 times [2018-10-04 09:50:51,222 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:50:51,222 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:50:51,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:51,222 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:50:51,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:51,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:50:51,454 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:50:51,600 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 09:50:51,601 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:50:51,601 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:50:51,608 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:50:51,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:50:51,623 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:50:51,886 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:50:52,107 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 09:50:52,128 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:50:52,128 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 52 [2018-10-04 09:50:52,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-04 09:50:52,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-04 09:50:52,129 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:50:52,129 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 54 states. [2018-10-04 09:50:52,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:50:52,271 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-10-04 09:50:52,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-04 09:50:52,272 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 53 [2018-10-04 09:50:52,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:50:52,273 INFO L225 Difference]: With dead ends: 57 [2018-10-04 09:50:52,273 INFO L226 Difference]: Without dead ends: 56 [2018-10-04 09:50:52,273 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.5s impTime 16 [2018-10-04 09:50:52,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-04 09:50:52,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-10-04 09:50:52,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-04 09:50:52,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-10-04 09:50:52,278 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 53 [2018-10-04 09:50:52,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:50:52,278 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-10-04 09:50:52,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-04 09:50:52,278 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-10-04 09:50:52,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-04 09:50:52,279 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:50:52,279 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1] [2018-10-04 09:50:52,279 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:50:52,280 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:50:52,280 INFO L82 PathProgramCache]: Analyzing trace with hash -735811308, now seen corresponding path program 26 times [2018-10-04 09:50:52,280 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:50:52,280 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:50:52,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:52,281 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:50:52,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:52,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:50:52,587 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:50:52,788 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 09:50:52,788 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:50:52,788 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:50:52,796 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:50:52,809 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:50:52,809 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:50:52,811 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:50:53,060 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:50:53,301 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 09:50:53,320 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:50:53,321 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 54 [2018-10-04 09:50:53,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-04 09:50:53,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-04 09:50:53,322 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:50:53,322 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 56 states. [2018-10-04 09:50:53,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:50:53,499 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-10-04 09:50:53,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-04 09:50:53,500 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 55 [2018-10-04 09:50:53,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:50:53,500 INFO L225 Difference]: With dead ends: 59 [2018-10-04 09:50:53,500 INFO L226 Difference]: Without dead ends: 58 [2018-10-04 09:50:53,501 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.6s impTime 16 [2018-10-04 09:50:53,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-10-04 09:50:53,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-10-04 09:50:53,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-04 09:50:53,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-10-04 09:50:53,504 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 55 [2018-10-04 09:50:53,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:50:53,505 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-10-04 09:50:53,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-04 09:50:53,505 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-10-04 09:50:53,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-04 09:50:53,505 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:50:53,506 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1] [2018-10-04 09:50:53,506 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:50:53,506 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:50:53,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1554937942, now seen corresponding path program 27 times [2018-10-04 09:50:53,506 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:50:53,506 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:50:53,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:53,507 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:50:53,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:53,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:50:53,813 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:50:54,037 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 09:50:54,038 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:50:54,038 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:50:54,045 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:50:54,074 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-10-04 09:50:54,074 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:50:54,076 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:50:54,315 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:50:54,579 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 09:50:54,599 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:50:54,600 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 56 [2018-10-04 09:50:54,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-04 09:50:54,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-04 09:50:54,601 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:50:54,601 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 58 states. [2018-10-04 09:50:54,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:50:54,743 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-10-04 09:50:54,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-04 09:50:54,744 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 57 [2018-10-04 09:50:54,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:50:54,745 INFO L225 Difference]: With dead ends: 61 [2018-10-04 09:50:54,745 INFO L226 Difference]: Without dead ends: 60 [2018-10-04 09:50:54,745 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.7s impTime 17 [2018-10-04 09:50:54,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-04 09:50:54,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-10-04 09:50:54,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-04 09:50:54,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-10-04 09:50:54,747 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 57 [2018-10-04 09:50:54,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:50:54,748 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-10-04 09:50:54,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-04 09:50:54,748 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-10-04 09:50:54,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-10-04 09:50:54,749 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:50:54,749 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1] [2018-10-04 09:50:54,749 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:50:54,749 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:50:54,749 INFO L82 PathProgramCache]: Analyzing trace with hash -353255656, now seen corresponding path program 28 times [2018-10-04 09:50:54,749 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:50:54,750 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:50:54,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:54,750 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:50:54,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:54,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:50:55,026 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:50:55,231 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 09:50:55,231 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:50:55,231 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:50:55,238 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:50:55,274 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:50:55,274 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:50:55,276 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:50:56,097 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:50:56,429 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 09:50:56,448 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:50:56,449 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 58 [2018-10-04 09:50:56,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-04 09:50:56,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-04 09:50:56,450 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:50:56,450 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 60 states. [2018-10-04 09:50:56,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:50:56,762 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-10-04 09:50:56,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-04 09:50:56,763 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 59 [2018-10-04 09:50:56,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:50:56,764 INFO L225 Difference]: With dead ends: 63 [2018-10-04 09:50:56,764 INFO L226 Difference]: Without dead ends: 62 [2018-10-04 09:50:56,764 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.1s impTime 18 [2018-10-04 09:50:56,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-10-04 09:50:56,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-10-04 09:50:56,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-04 09:50:56,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-10-04 09:50:56,769 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 59 [2018-10-04 09:50:56,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:50:56,769 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-10-04 09:50:56,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-04 09:50:56,769 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-10-04 09:50:56,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-04 09:50:56,770 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:50:56,770 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1] [2018-10-04 09:50:56,770 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:50:56,770 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:50:56,770 INFO L82 PathProgramCache]: Analyzing trace with hash -176267942, now seen corresponding path program 29 times [2018-10-04 09:50:56,771 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:50:56,771 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:50:56,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:56,771 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:50:56,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:56,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:50:57,087 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:50:57,188 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 09:50:57,189 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:50:57,189 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 09:50:57,197 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:50:57,222 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-10-04 09:50:57,222 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:50:57,224 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:50:57,487 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:50:57,803 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 09:50:57,822 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:50:57,823 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 60 [2018-10-04 09:50:57,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-04 09:50:57,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-04 09:50:57,824 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:50:57,824 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 62 states. [2018-10-04 09:50:58,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:50:58,032 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-10-04 09:50:58,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-04 09:50:58,033 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 61 [2018-10-04 09:50:58,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:50:58,035 INFO L225 Difference]: With dead ends: 65 [2018-10-04 09:50:58,035 INFO L226 Difference]: Without dead ends: 64 [2018-10-04 09:50:58,036 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.6s impTime 20 [2018-10-04 09:50:58,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-10-04 09:50:58,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-10-04 09:50:58,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-04 09:50:58,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-10-04 09:50:58,040 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 61 [2018-10-04 09:50:58,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:50:58,040 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-10-04 09:50:58,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-04 09:50:58,040 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-10-04 09:50:58,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-04 09:50:58,041 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:50:58,041 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1] [2018-10-04 09:50:58,041 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:50:58,041 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:50:58,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1889766628, now seen corresponding path program 30 times [2018-10-04 09:50:58,042 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:50:58,042 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:50:58,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:58,042 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:50:58,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:58,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:50:58,450 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:50:58,747 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 09:50:58,747 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:50:58,747 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 09:50:58,756 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:50:58,786 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-04 09:50:58,786 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:50:58,790 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:50:59,057 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:50:59,392 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 09:50:59,412 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:50:59,413 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 62 [2018-10-04 09:50:59,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-04 09:50:59,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-04 09:50:59,413 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:50:59,414 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 64 states. [2018-10-04 09:50:59,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:50:59,548 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-10-04 09:50:59,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-04 09:50:59,548 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 63 [2018-10-04 09:50:59,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:50:59,549 INFO L225 Difference]: With dead ends: 67 [2018-10-04 09:50:59,549 INFO L226 Difference]: Without dead ends: 66 [2018-10-04 09:50:59,550 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.9s impTime 21 [2018-10-04 09:50:59,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-04 09:50:59,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-10-04 09:50:59,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-04 09:50:59,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-10-04 09:50:59,552 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 63 [2018-10-04 09:50:59,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:50:59,552 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-10-04 09:50:59,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-04 09:50:59,553 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-10-04 09:50:59,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-04 09:50:59,553 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:50:59,553 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1] [2018-10-04 09:50:59,553 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:50:59,553 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:50:59,553 INFO L82 PathProgramCache]: Analyzing trace with hash 705437790, now seen corresponding path program 31 times [2018-10-04 09:50:59,554 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:50:59,554 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:50:59,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:59,554 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:50:59,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:59,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:50:59,878 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:51:00,197 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 09:51:00,197 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:00,197 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:51:00,204 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:51:00,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:00,220 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:00,516 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:51:01,028 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 09:51:01,047 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:01,048 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 64 [2018-10-04 09:51:01,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-04 09:51:01,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-04 09:51:01,049 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:01,049 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 66 states. [2018-10-04 09:51:01,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:01,195 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-10-04 09:51:01,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-04 09:51:01,196 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 65 [2018-10-04 09:51:01,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:01,197 INFO L225 Difference]: With dead ends: 69 [2018-10-04 09:51:01,197 INFO L226 Difference]: Without dead ends: 68 [2018-10-04 09:51:01,197 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 1.0s impTime 22 [2018-10-04 09:51:01,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-04 09:51:01,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-10-04 09:51:01,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-04 09:51:01,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-10-04 09:51:01,200 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 65 [2018-10-04 09:51:01,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:01,200 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-10-04 09:51:01,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-04 09:51:01,201 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-10-04 09:51:01,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-04 09:51:01,201 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:01,201 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1] [2018-10-04 09:51:01,201 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:01,201 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:01,201 INFO L82 PathProgramCache]: Analyzing trace with hash -679115488, now seen corresponding path program 32 times [2018-10-04 09:51:01,201 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:01,202 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:01,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:01,202 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:51:01,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:01,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:01,855 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:51:02,087 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 09:51:02,087 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:02,087 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:51:02,095 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:51:02,111 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:51:02,112 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:51:02,114 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:02,488 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:51:02,988 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 09:51:03,009 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:03,009 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 66 [2018-10-04 09:51:03,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-04 09:51:03,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-04 09:51:03,010 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:03,010 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 68 states. [2018-10-04 09:51:03,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:03,160 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-10-04 09:51:03,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-04 09:51:03,160 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 67 [2018-10-04 09:51:03,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:03,161 INFO L225 Difference]: With dead ends: 71 [2018-10-04 09:51:03,161 INFO L226 Difference]: Without dead ends: 70 [2018-10-04 09:51:03,162 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 1.2s impTime 23 [2018-10-04 09:51:03,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-10-04 09:51:03,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-10-04 09:51:03,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-04 09:51:03,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-10-04 09:51:03,165 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 67 [2018-10-04 09:51:03,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:03,166 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-10-04 09:51:03,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-04 09:51:03,166 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-10-04 09:51:03,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-10-04 09:51:03,166 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:03,166 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1] [2018-10-04 09:51:03,166 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:03,167 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:03,167 INFO L82 PathProgramCache]: Analyzing trace with hash 205046114, now seen corresponding path program 33 times [2018-10-04 09:51:03,167 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:03,167 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:03,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:03,168 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:51:03,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:03,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:03,465 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:51:04,252 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 09:51:04,252 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:04,252 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 09:51:04,259 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:51:04,290 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-10-04 09:51:04,291 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:51:04,292 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:04,556 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:51:05,025 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 09:51:05,045 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:05,045 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 68 [2018-10-04 09:51:05,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-04 09:51:05,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-04 09:51:05,046 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:05,046 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 70 states. [2018-10-04 09:51:05,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:05,220 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-10-04 09:51:05,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-04 09:51:05,220 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 69 [2018-10-04 09:51:05,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:05,221 INFO L225 Difference]: With dead ends: 73 [2018-10-04 09:51:05,221 INFO L226 Difference]: Without dead ends: 72 [2018-10-04 09:51:05,222 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 1.4s impTime 23 [2018-10-04 09:51:05,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-10-04 09:51:05,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-10-04 09:51:05,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-10-04 09:51:05,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-10-04 09:51:05,225 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 69 [2018-10-04 09:51:05,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:05,225 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-10-04 09:51:05,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-04 09:51:05,225 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-10-04 09:51:05,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-10-04 09:51:05,226 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:05,226 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1] [2018-10-04 09:51:05,226 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:05,226 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:05,226 INFO L82 PathProgramCache]: Analyzing trace with hash -519178972, now seen corresponding path program 34 times [2018-10-04 09:51:05,226 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:05,226 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:05,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:05,227 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:51:05,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:05,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:05,479 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:51:05,695 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:51:05,702 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 09:51:05,703 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:05,703 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 09:51:05,710 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:51:05,730 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:51:05,730 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:51:05,731 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:06,584 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:51:06,901 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:51:06,930 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 09:51:06,950 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:06,950 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 70 [2018-10-04 09:51:06,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-04 09:51:06,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-04 09:51:06,951 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:06,951 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 72 states. [2018-10-04 09:51:07,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:07,102 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-10-04 09:51:07,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-04 09:51:07,103 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 71 [2018-10-04 09:51:07,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:07,104 INFO L225 Difference]: With dead ends: 75 [2018-10-04 09:51:07,104 INFO L226 Difference]: Without dead ends: 74 [2018-10-04 09:51:07,104 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.8s impTime 8 [2018-10-04 09:51:07,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-04 09:51:07,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-10-04 09:51:07,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-10-04 09:51:07,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-10-04 09:51:07,108 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 71 [2018-10-04 09:51:07,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:07,108 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-10-04 09:51:07,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-04 09:51:07,108 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-10-04 09:51:07,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-10-04 09:51:07,109 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:07,109 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1] [2018-10-04 09:51:07,109 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:07,109 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:07,109 INFO L82 PathProgramCache]: Analyzing trace with hash -714784666, now seen corresponding path program 35 times [2018-10-04 09:51:07,109 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:07,109 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:07,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:07,110 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:51:07,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:07,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:07,428 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:51:07,617 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:51:07,642 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 09:51:07,643 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:07,643 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 09:51:07,651 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:51:07,682 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-10-04 09:51:07,683 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:51:07,686 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:07,953 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:51:08,505 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:51:08,588 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 09:51:08,607 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:08,608 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 72 [2018-10-04 09:51:08,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-04 09:51:08,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-04 09:51:08,608 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:08,609 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 74 states. [2018-10-04 09:51:09,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:09,107 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-10-04 09:51:09,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-04 09:51:09,108 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 73 [2018-10-04 09:51:09,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:09,109 INFO L225 Difference]: With dead ends: 77 [2018-10-04 09:51:09,109 INFO L226 Difference]: Without dead ends: 76 [2018-10-04 09:51:09,109 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.9s impTime 9 [2018-10-04 09:51:09,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-10-04 09:51:09,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-10-04 09:51:09,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-04 09:51:09,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-10-04 09:51:09,112 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 73 [2018-10-04 09:51:09,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:09,112 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-10-04 09:51:09,112 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-04 09:51:09,112 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-10-04 09:51:09,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-10-04 09:51:09,113 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:09,113 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1] [2018-10-04 09:51:09,113 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:09,113 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:09,113 INFO L82 PathProgramCache]: Analyzing trace with hash 286704424, now seen corresponding path program 36 times [2018-10-04 09:51:09,113 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:09,113 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:09,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:09,114 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:51:09,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:09,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:09,455 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:51:09,928 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:51:10,005 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 09:51:10,006 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:10,006 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 09:51:10,027 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:51:10,084 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-04 09:51:10,085 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:51:10,087 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:10,274 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:51:10,688 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:51:10,780 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 09:51:10,801 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:10,801 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 74 [2018-10-04 09:51:10,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-04 09:51:10,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-04 09:51:10,802 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:10,802 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 76 states. [2018-10-04 09:51:10,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:10,984 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-10-04 09:51:10,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-04 09:51:10,984 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 75 [2018-10-04 09:51:10,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:10,985 INFO L225 Difference]: With dead ends: 79 [2018-10-04 09:51:10,985 INFO L226 Difference]: Without dead ends: 78 [2018-10-04 09:51:10,985 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 1.0s impTime 10 [2018-10-04 09:51:10,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-10-04 09:51:10,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-10-04 09:51:10,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-10-04 09:51:10,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-10-04 09:51:10,988 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 75 [2018-10-04 09:51:10,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:10,988 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-10-04 09:51:10,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-04 09:51:10,988 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-10-04 09:51:10,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-10-04 09:51:10,989 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:10,989 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1] [2018-10-04 09:51:10,989 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:10,989 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:10,989 INFO L82 PathProgramCache]: Analyzing trace with hash 645045610, now seen corresponding path program 37 times [2018-10-04 09:51:10,990 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:10,990 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:10,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:10,990 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:51:10,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:10,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:11,337 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:51:11,767 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:51:11,885 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 09:51:11,885 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:11,885 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 09:51:11,892 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:51:11,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:11,915 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:12,199 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 8 [2018-10-04 09:51:12,745 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 26 new depth: 8 [2018-10-04 09:51:12,877 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 09:51:12,897 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:12,897 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 76 [2018-10-04 09:51:12,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-04 09:51:12,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-04 09:51:12,898 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:12,899 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 78 states. [2018-10-04 09:51:13,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:13,095 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-10-04 09:51:13,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-04 09:51:13,096 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 77 [2018-10-04 09:51:13,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:13,097 INFO L225 Difference]: With dead ends: 81 [2018-10-04 09:51:13,097 INFO L226 Difference]: Without dead ends: 80 [2018-10-04 09:51:13,097 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 1.3s impTime 11 [2018-10-04 09:51:13,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-10-04 09:51:13,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-10-04 09:51:13,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-04 09:51:13,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-10-04 09:51:13,101 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 77 [2018-10-04 09:51:13,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:13,102 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-10-04 09:51:13,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-04 09:51:13,102 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-10-04 09:51:13,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-04 09:51:13,102 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:13,103 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1] [2018-10-04 09:51:13,103 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:13,103 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:13,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1413541676, now seen corresponding path program 38 times [2018-10-04 09:51:13,103 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:13,103 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:13,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:13,104 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:51:13,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:13,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:14,444 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:51:14,912 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:51:15,069 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 09:51:15,069 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:15,069 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:51:15,077 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:51:15,097 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:51:15,097 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:51:15,099 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:15,368 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:51:15,898 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:51:16,131 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 09:51:16,152 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:16,152 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 78 [2018-10-04 09:51:16,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-04 09:51:16,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-04 09:51:16,153 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:16,153 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 80 states. [2018-10-04 09:51:16,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:16,420 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-10-04 09:51:16,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-04 09:51:16,420 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 79 [2018-10-04 09:51:16,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:16,421 INFO L225 Difference]: With dead ends: 83 [2018-10-04 09:51:16,421 INFO L226 Difference]: Without dead ends: 82 [2018-10-04 09:51:16,421 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s Time 2.3s impTime 12 [2018-10-04 09:51:16,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-10-04 09:51:16,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-10-04 09:51:16,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-10-04 09:51:16,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-10-04 09:51:16,426 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 79 [2018-10-04 09:51:16,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:16,426 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-10-04 09:51:16,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-04 09:51:16,426 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-10-04 09:51:16,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-10-04 09:51:16,427 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:16,427 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1] [2018-10-04 09:51:16,427 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:16,427 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:16,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1203886190, now seen corresponding path program 39 times [2018-10-04 09:51:16,428 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:16,428 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:16,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:16,428 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:51:16,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:16,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:16,883 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:51:17,387 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:51:17,583 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 09:51:17,583 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:17,583 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:51:17,590 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:51:17,627 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-10-04 09:51:17,628 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:51:17,629 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:17,882 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:51:18,444 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:51:18,653 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 09:51:18,673 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:18,673 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 80 [2018-10-04 09:51:18,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-04 09:51:18,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-04 09:51:18,674 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:18,674 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 82 states. [2018-10-04 09:51:18,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:18,870 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-10-04 09:51:18,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-04 09:51:18,871 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 81 [2018-10-04 09:51:18,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:18,872 INFO L225 Difference]: With dead ends: 85 [2018-10-04 09:51:18,872 INFO L226 Difference]: Without dead ends: 84 [2018-10-04 09:51:18,872 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time 1.6s impTime 13 [2018-10-04 09:51:18,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-10-04 09:51:18,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-10-04 09:51:18,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-10-04 09:51:18,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-10-04 09:51:18,875 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 81 [2018-10-04 09:51:18,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:18,875 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-10-04 09:51:18,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-04 09:51:18,875 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-10-04 09:51:18,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-04 09:51:18,876 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:18,876 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1] [2018-10-04 09:51:18,876 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:18,876 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:18,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1588427056, now seen corresponding path program 40 times [2018-10-04 09:51:18,877 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:18,877 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:18,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:18,878 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:51:18,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:18,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:19,197 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:51:19,633 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:51:19,835 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 09:51:19,835 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:19,835 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:51:19,843 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:51:19,867 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:51:19,867 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:51:19,869 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:20,176 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:51:20,734 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:51:20,965 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 09:51:20,985 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:20,985 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 82 [2018-10-04 09:51:20,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-04 09:51:20,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-04 09:51:20,986 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:20,986 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 84 states. [2018-10-04 09:51:21,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:21,242 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-10-04 09:51:21,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-04 09:51:21,242 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 83 [2018-10-04 09:51:21,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:21,243 INFO L225 Difference]: With dead ends: 87 [2018-10-04 09:51:21,243 INFO L226 Difference]: Without dead ends: 86 [2018-10-04 09:51:21,243 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 1.5s impTime 14 [2018-10-04 09:51:21,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-04 09:51:21,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-10-04 09:51:21,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-04 09:51:21,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-10-04 09:51:21,247 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 83 [2018-10-04 09:51:21,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:21,247 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-10-04 09:51:21,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-04 09:51:21,247 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-10-04 09:51:21,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-10-04 09:51:21,248 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:21,248 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1] [2018-10-04 09:51:21,248 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:21,249 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:21,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1765011826, now seen corresponding path program 41 times [2018-10-04 09:51:21,249 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:21,249 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:21,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:21,250 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:51:21,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:21,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:21,637 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:51:21,839 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:51:21,977 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 09:51:21,977 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:21,977 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 09:51:21,985 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:51:22,026 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-10-04 09:51:22,026 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:51:22,029 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:22,326 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:51:22,733 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:51:22,939 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 09:51:22,959 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:22,959 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 84 [2018-10-04 09:51:22,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-04 09:51:22,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-04 09:51:22,961 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:22,961 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 86 states. [2018-10-04 09:51:23,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:23,147 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-10-04 09:51:23,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-04 09:51:23,147 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 85 [2018-10-04 09:51:23,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:23,148 INFO L225 Difference]: With dead ends: 89 [2018-10-04 09:51:23,149 INFO L226 Difference]: Without dead ends: 88 [2018-10-04 09:51:23,149 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 09:51:23,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-10-04 09:51:23,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-10-04 09:51:23,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-04 09:51:23,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-10-04 09:51:23,153 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 85 [2018-10-04 09:51:23,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:23,153 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-10-04 09:51:23,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-04 09:51:23,154 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-10-04 09:51:23,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-04 09:51:23,154 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:23,154 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1] [2018-10-04 09:51:23,155 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:23,155 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:23,155 INFO L82 PathProgramCache]: Analyzing trace with hash -335716044, now seen corresponding path program 42 times [2018-10-04 09:51:23,155 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:23,155 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:23,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:23,156 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:51:23,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:23,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:23,425 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:51:23,886 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:51:24,208 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 09:51:24,208 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:24,208 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:51:24,219 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:51:24,330 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-10-04 09:51:24,330 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:51:24,333 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:24,975 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:51:25,532 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:51:25,864 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 09:51:25,883 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:25,884 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 86 [2018-10-04 09:51:25,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-04 09:51:25,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-04 09:51:25,885 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:25,885 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 88 states. [2018-10-04 09:51:26,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:26,117 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-10-04 09:51:26,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-04 09:51:26,117 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 87 [2018-10-04 09:51:26,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:26,118 INFO L225 Difference]: With dead ends: 91 [2018-10-04 09:51:26,118 INFO L226 Difference]: Without dead ends: 90 [2018-10-04 09:51:26,119 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s Time 1.8s impTime 16 [2018-10-04 09:51:26,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-10-04 09:51:26,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-10-04 09:51:26,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-10-04 09:51:26,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-10-04 09:51:26,123 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 87 [2018-10-04 09:51:26,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:26,123 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-10-04 09:51:26,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-04 09:51:26,123 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-10-04 09:51:26,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-10-04 09:51:26,124 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:26,124 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1] [2018-10-04 09:51:26,124 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:26,124 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:26,124 INFO L82 PathProgramCache]: Analyzing trace with hash -500569994, now seen corresponding path program 43 times [2018-10-04 09:51:26,124 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:26,124 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:26,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:26,125 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:51:26,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:26,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:26,477 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:51:26,994 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:51:27,360 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 09:51:27,360 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:27,360 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:51:27,367 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:51:27,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:27,393 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:27,695 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:51:28,421 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:51:28,788 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 09:51:28,820 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:28,820 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 88 [2018-10-04 09:51:28,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-04 09:51:28,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-04 09:51:28,823 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:28,823 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 90 states. [2018-10-04 09:51:29,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:29,152 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-10-04 09:51:29,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-04 09:51:29,152 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 89 [2018-10-04 09:51:29,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:29,153 INFO L225 Difference]: With dead ends: 93 [2018-10-04 09:51:29,153 INFO L226 Difference]: Without dead ends: 92 [2018-10-04 09:51:29,154 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s Time 2.0s impTime 17 [2018-10-04 09:51:29,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-10-04 09:51:29,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-10-04 09:51:29,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-10-04 09:51:29,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-10-04 09:51:29,157 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 89 [2018-10-04 09:51:29,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:29,157 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-10-04 09:51:29,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-04 09:51:29,158 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-10-04 09:51:29,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-10-04 09:51:29,158 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:29,158 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1] [2018-10-04 09:51:29,159 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:29,159 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:29,159 INFO L82 PathProgramCache]: Analyzing trace with hash -11425992, now seen corresponding path program 44 times [2018-10-04 09:51:29,159 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:29,159 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:29,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:29,160 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:51:29,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:29,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:29,717 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:51:30,302 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:51:30,425 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 09:51:30,426 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:30,426 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:51:30,435 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:51:30,462 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:51:30,463 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:51:30,465 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:30,764 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:51:31,318 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:51:31,888 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 09:51:31,907 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:31,907 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 90 [2018-10-04 09:51:31,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-04 09:51:31,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-04 09:51:31,908 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:31,908 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 92 states. [2018-10-04 09:51:32,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:32,123 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-10-04 09:51:32,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-04 09:51:32,124 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 91 [2018-10-04 09:51:32,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:32,124 INFO L225 Difference]: With dead ends: 95 [2018-10-04 09:51:32,125 INFO L226 Difference]: Without dead ends: 94 [2018-10-04 09:51:32,125 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s Time 2.0s impTime 18 [2018-10-04 09:51:32,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-10-04 09:51:32,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-10-04 09:51:32,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-04 09:51:32,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-10-04 09:51:32,128 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 91 [2018-10-04 09:51:32,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:32,129 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-10-04 09:51:32,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-04 09:51:32,129 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-10-04 09:51:32,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-10-04 09:51:32,130 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:32,130 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1] [2018-10-04 09:51:32,130 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:32,130 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:32,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1904524666, now seen corresponding path program 45 times [2018-10-04 09:51:32,130 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:32,131 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:32,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:32,131 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:51:32,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:32,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:32,447 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:51:32,922 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:51:33,330 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 09:51:33,330 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:33,331 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:51:33,340 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:51:33,445 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-10-04 09:51:33,446 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:51:33,448 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:33,665 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:51:34,133 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:51:34,552 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 09:51:34,572 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:34,572 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 92 [2018-10-04 09:51:34,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-10-04 09:51:34,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-10-04 09:51:34,573 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:34,573 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 94 states. [2018-10-04 09:51:34,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:34,804 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-10-04 09:51:34,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-04 09:51:34,804 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 93 [2018-10-04 09:51:34,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:34,805 INFO L225 Difference]: With dead ends: 97 [2018-10-04 09:51:34,805 INFO L226 Difference]: Without dead ends: 96 [2018-10-04 09:51:34,806 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time 1.7s impTime 19 [2018-10-04 09:51:34,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-10-04 09:51:34,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-10-04 09:51:34,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-10-04 09:51:34,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-10-04 09:51:34,809 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 93 [2018-10-04 09:51:34,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:34,810 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-10-04 09:51:34,810 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-10-04 09:51:34,810 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-10-04 09:51:34,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-10-04 09:51:34,810 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:34,810 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1] [2018-10-04 09:51:34,811 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:34,811 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:34,811 INFO L82 PathProgramCache]: Analyzing trace with hash 592137020, now seen corresponding path program 46 times [2018-10-04 09:51:34,811 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:34,811 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:34,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:34,811 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:51:34,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:34,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:35,574 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:51:35,767 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:51:36,034 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 09:51:36,034 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:36,034 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 09:51:36,042 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:51:36,071 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:51:36,071 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:51:36,073 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:36,525 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:51:37,019 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:51:37,282 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 09:51:37,302 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:37,302 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 94 [2018-10-04 09:51:37,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-04 09:51:37,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-04 09:51:37,304 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:37,304 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 96 states. [2018-10-04 09:51:37,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:37,555 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-10-04 09:51:37,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-04 09:51:37,555 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 95 [2018-10-04 09:51:37,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:37,556 INFO L225 Difference]: With dead ends: 99 [2018-10-04 09:51:37,556 INFO L226 Difference]: Without dead ends: 98 [2018-10-04 09:51:37,557 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time 1.6s impTime 18 [2018-10-04 09:51:37,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-10-04 09:51:37,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-10-04 09:51:37,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-04 09:51:37,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-10-04 09:51:37,561 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 95 [2018-10-04 09:51:37,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:37,561 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-10-04 09:51:37,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-04 09:51:37,562 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-10-04 09:51:37,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-10-04 09:51:37,562 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:37,562 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1] [2018-10-04 09:51:37,562 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:37,563 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:37,563 INFO L82 PathProgramCache]: Analyzing trace with hash 2107994238, now seen corresponding path program 47 times [2018-10-04 09:51:37,563 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:37,563 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:37,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:37,563 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:51:37,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:37,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:38,057 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:51:38,279 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:51:38,548 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 09:51:38,548 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:38,548 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:51:38,571 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:51:38,626 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-10-04 09:51:38,626 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:51:38,628 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:38,960 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:51:39,489 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:51:39,739 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 09:51:39,759 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:39,759 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 96 [2018-10-04 09:51:39,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-10-04 09:51:39,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-10-04 09:51:39,760 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:39,760 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 98 states. [2018-10-04 09:51:39,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:39,981 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-10-04 09:51:39,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-04 09:51:39,981 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 97 [2018-10-04 09:51:39,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:39,982 INFO L225 Difference]: With dead ends: 101 [2018-10-04 09:51:39,982 INFO L226 Difference]: Without dead ends: 100 [2018-10-04 09:51:39,983 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 1.4s impTime 19 [2018-10-04 09:51:39,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-10-04 09:51:39,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-10-04 09:51:39,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-04 09:51:39,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-10-04 09:51:39,986 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 97 [2018-10-04 09:51:39,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:39,986 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-10-04 09:51:39,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-10-04 09:51:39,987 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-10-04 09:51:39,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-10-04 09:51:39,987 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:39,987 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1] [2018-10-04 09:51:39,987 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:39,987 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:39,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1442099904, now seen corresponding path program 48 times [2018-10-04 09:51:39,988 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:39,988 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:39,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:39,988 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:51:39,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:39,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:40,240 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:51:40,544 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:51:41,000 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 09:51:41,000 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:41,000 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 09:51:41,010 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:51:41,078 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-10-04 09:51:41,078 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:51:41,081 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:41,349 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:51:41,855 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:51:42,332 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 09:51:42,352 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:42,352 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 98 [2018-10-04 09:51:42,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-10-04 09:51:42,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-10-04 09:51:42,353 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:42,353 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 100 states. [2018-10-04 09:51:42,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:42,584 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-10-04 09:51:42,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-04 09:51:42,584 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 99 [2018-10-04 09:51:42,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:42,585 INFO L225 Difference]: With dead ends: 103 [2018-10-04 09:51:42,585 INFO L226 Difference]: Without dead ends: 102 [2018-10-04 09:51:42,585 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time 1.6s impTime 20 [2018-10-04 09:51:42,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-10-04 09:51:42,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-10-04 09:51:42,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-10-04 09:51:42,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-10-04 09:51:42,589 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 99 [2018-10-04 09:51:42,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:42,590 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-10-04 09:51:42,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-10-04 09:51:42,590 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-10-04 09:51:42,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-10-04 09:51:42,590 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:42,591 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1] [2018-10-04 09:51:42,591 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:42,591 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:42,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1416429954, now seen corresponding path program 49 times [2018-10-04 09:51:42,591 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:42,591 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:42,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:42,592 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:51:42,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:42,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:42,976 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:51:43,391 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:51:44,019 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:51:44,033 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 09:51:44,033 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:44,033 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 09:51:44,040 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:51:44,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:44,077 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:45,295 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:51:45,808 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:51:46,371 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 09:51:46,391 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:46,391 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 100 [2018-10-04 09:51:46,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-10-04 09:51:46,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-10-04 09:51:46,392 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:46,392 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 102 states. [2018-10-04 09:51:46,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:46,646 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-10-04 09:51:46,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-04 09:51:46,646 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 101 [2018-10-04 09:51:46,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:46,647 INFO L225 Difference]: With dead ends: 105 [2018-10-04 09:51:46,647 INFO L226 Difference]: Without dead ends: 104 [2018-10-04 09:51:46,647 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s Time 2.7s impTime 21 [2018-10-04 09:51:46,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-10-04 09:51:46,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-10-04 09:51:46,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-10-04 09:51:46,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-10-04 09:51:46,651 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 101 [2018-10-04 09:51:46,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:46,652 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-10-04 09:51:46,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-10-04 09:51:46,652 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-10-04 09:51:46,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-10-04 09:51:46,652 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:46,652 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1] [2018-10-04 09:51:46,653 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:46,653 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:46,653 INFO L82 PathProgramCache]: Analyzing trace with hash -315445948, now seen corresponding path program 50 times [2018-10-04 09:51:46,653 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:46,653 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:46,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:46,654 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:51:46,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:46,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:47,175 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:51:47,629 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:51:48,289 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:51:48,353 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 09:51:48,353 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:48,353 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:51:48,364 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:51:48,400 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:51:48,400 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:51:48,403 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:48,765 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:51:49,326 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:51:49,936 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 09:51:49,957 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:49,957 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 102 [2018-10-04 09:51:49,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-10-04 09:51:49,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-10-04 09:51:49,958 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:49,959 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 104 states. [2018-10-04 09:51:51,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:51,195 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-10-04 09:51:51,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-04 09:51:51,196 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 103 [2018-10-04 09:51:51,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:51,198 INFO L225 Difference]: With dead ends: 107 [2018-10-04 09:51:51,198 INFO L226 Difference]: Without dead ends: 106 [2018-10-04 09:51:51,198 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s Time 2.5s impTime 22 [2018-10-04 09:51:51,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-10-04 09:51:51,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-10-04 09:51:51,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-10-04 09:51:51,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-10-04 09:51:51,203 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 103 [2018-10-04 09:51:51,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:51,203 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-10-04 09:51:51,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-10-04 09:51:51,204 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-10-04 09:51:51,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-10-04 09:51:51,204 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:51,204 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1] [2018-10-04 09:51:51,205 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:51,205 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:51,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1799123078, now seen corresponding path program 51 times [2018-10-04 09:51:51,205 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:51,205 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:51,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:51,208 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:51:51,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:51,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:51,654 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:51:52,284 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:51:52,920 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:51:53,028 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 09:51:53,028 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:53,028 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 09:51:53,035 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:51:53,086 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-10-04 09:51:53,087 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:51:53,089 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:53,358 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:51:53,832 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:51:54,503 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 09:51:54,523 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:54,523 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 104 [2018-10-04 09:51:54,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-10-04 09:51:54,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-10-04 09:51:54,525 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:54,525 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 106 states. [2018-10-04 09:51:54,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:54,794 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-10-04 09:51:54,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-04 09:51:54,794 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 105 [2018-10-04 09:51:54,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:54,795 INFO L225 Difference]: With dead ends: 109 [2018-10-04 09:51:54,796 INFO L226 Difference]: Without dead ends: 108 [2018-10-04 09:51:54,796 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s Time 2.5s impTime 23 [2018-10-04 09:51:54,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-10-04 09:51:54,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-10-04 09:51:54,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-10-04 09:51:54,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-10-04 09:51:54,801 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 105 [2018-10-04 09:51:54,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:54,801 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-10-04 09:51:54,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-10-04 09:51:54,801 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-10-04 09:51:54,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-04 09:51:54,802 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:54,802 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1] [2018-10-04 09:51:54,802 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:54,802 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:54,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1914541240, now seen corresponding path program 52 times [2018-10-04 09:51:54,803 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:54,803 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:54,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:54,803 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:51:54,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:54,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:55,068 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:51:55,521 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:51:56,273 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:51:56,467 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 09:51:56,468 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:56,468 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 09:51:56,482 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:51:56,526 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:51:56,527 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:51:56,529 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:57,722 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:51:58,463 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:51:59,380 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 09:51:59,400 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:59,400 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 106 [2018-10-04 09:51:59,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-10-04 09:51:59,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-10-04 09:51:59,402 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:59,402 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 108 states. [2018-10-04 09:51:59,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:59,756 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-10-04 09:51:59,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-04 09:51:59,757 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 107 [2018-10-04 09:51:59,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:59,758 INFO L225 Difference]: With dead ends: 111 [2018-10-04 09:51:59,758 INFO L226 Difference]: Without dead ends: 110 [2018-10-04 09:51:59,758 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s Time 3.5s impTime 24 [2018-10-04 09:51:59,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-04 09:51:59,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-10-04 09:51:59,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-10-04 09:51:59,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-10-04 09:51:59,763 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 107 [2018-10-04 09:51:59,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:59,763 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-10-04 09:51:59,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-10-04 09:51:59,763 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-10-04 09:51:59,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-10-04 09:51:59,764 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:59,764 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1] [2018-10-04 09:51:59,765 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:59,765 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:59,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1628127862, now seen corresponding path program 53 times [2018-10-04 09:51:59,765 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:59,765 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:59,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:59,766 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:51:59,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:59,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:00,437 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:52:00,685 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:01,064 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:01,283 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 09:52:01,283 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:01,283 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 09:52:01,292 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:52:01,347 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-10-04 09:52:01,348 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:52:01,351 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:01,685 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:52:02,408 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:52:03,233 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:52:03,257 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 09:52:03,287 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:03,288 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 108 [2018-10-04 09:52:03,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-10-04 09:52:03,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-10-04 09:52:03,289 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:03,289 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 110 states. [2018-10-04 09:52:03,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:03,605 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-10-04 09:52:03,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-04 09:52:03,605 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 109 [2018-10-04 09:52:03,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:03,606 INFO L225 Difference]: With dead ends: 113 [2018-10-04 09:52:03,606 INFO L226 Difference]: Without dead ends: 112 [2018-10-04 09:52:03,607 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s Time 2.5s impTime 8 [2018-10-04 09:52:03,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-10-04 09:52:03,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-10-04 09:52:03,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-04 09:52:03,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-10-04 09:52:03,610 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 109 [2018-10-04 09:52:03,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:03,611 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-10-04 09:52:03,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-10-04 09:52:03,611 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-10-04 09:52:03,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-10-04 09:52:03,611 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:03,611 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1] [2018-10-04 09:52:03,612 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:03,612 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:03,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1262778548, now seen corresponding path program 54 times [2018-10-04 09:52:03,612 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:03,612 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:03,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:03,612 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:52:03,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:03,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:04,283 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:52:04,700 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:05,287 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:05,559 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 09:52:05,560 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:05,560 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 09:52:05,567 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:52:05,618 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-10-04 09:52:05,618 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:52:05,621 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:05,973 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:52:06,928 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:52:07,950 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:52:08,024 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 09:52:08,044 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:08,044 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 110 [2018-10-04 09:52:08,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-10-04 09:52:08,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-10-04 09:52:08,046 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:08,046 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 112 states. [2018-10-04 09:52:08,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:08,472 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-10-04 09:52:08,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-04 09:52:08,472 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 111 [2018-10-04 09:52:08,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:08,473 INFO L225 Difference]: With dead ends: 115 [2018-10-04 09:52:08,473 INFO L226 Difference]: Without dead ends: 114 [2018-10-04 09:52:08,474 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s Time 3.0s impTime 8 [2018-10-04 09:52:08,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-10-04 09:52:08,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-10-04 09:52:08,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-10-04 09:52:08,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2018-10-04 09:52:08,478 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 111 [2018-10-04 09:52:08,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:08,478 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2018-10-04 09:52:08,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-10-04 09:52:08,478 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2018-10-04 09:52:08,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-10-04 09:52:08,479 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:08,479 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1] [2018-10-04 09:52:08,479 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:08,479 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:08,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1945561230, now seen corresponding path program 55 times [2018-10-04 09:52:08,479 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:08,480 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:08,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:08,480 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:52:08,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:08,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:08,697 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:52:09,103 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:09,817 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:10,113 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 09:52:10,113 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:10,113 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 09:52:10,120 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:52:10,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:10,151 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:10,462 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:52:10,978 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:52:11,705 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:52:11,883 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 09:52:11,903 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:11,903 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 112 [2018-10-04 09:52:11,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-10-04 09:52:11,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-10-04 09:52:11,905 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:11,905 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 114 states. [2018-10-04 09:52:12,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:12,289 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-10-04 09:52:12,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-04 09:52:12,289 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 113 [2018-10-04 09:52:12,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:12,290 INFO L225 Difference]: With dead ends: 117 [2018-10-04 09:52:12,290 INFO L226 Difference]: Without dead ends: 116 [2018-10-04 09:52:12,291 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s Time 2.7s impTime 11 [2018-10-04 09:52:12,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-10-04 09:52:12,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-10-04 09:52:12,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-04 09:52:12,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2018-10-04 09:52:12,295 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 113 [2018-10-04 09:52:12,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:12,296 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2018-10-04 09:52:12,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-10-04 09:52:12,296 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2018-10-04 09:52:12,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-10-04 09:52:12,296 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:12,297 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 1, 1] [2018-10-04 09:52:12,297 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:12,297 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:12,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1373569360, now seen corresponding path program 56 times [2018-10-04 09:52:12,297 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:12,297 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:12,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:12,298 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:52:12,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:12,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:14,265 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:52:14,722 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:15,099 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:15,382 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 09:52:15,382 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:15,382 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:52:15,390 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:52:15,420 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:52:15,420 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:52:15,422 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:15,730 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:52:16,246 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:52:17,015 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:52:17,249 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 09:52:17,271 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:17,271 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 114 [2018-10-04 09:52:17,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-10-04 09:52:17,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-10-04 09:52:17,272 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:17,272 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 116 states. [2018-10-04 09:52:17,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:17,697 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-10-04 09:52:17,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-04 09:52:17,697 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 115 [2018-10-04 09:52:17,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:17,698 INFO L225 Difference]: With dead ends: 119 [2018-10-04 09:52:17,698 INFO L226 Difference]: Without dead ends: 118 [2018-10-04 09:52:17,699 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s Time 3.8s impTime 12 [2018-10-04 09:52:17,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-10-04 09:52:17,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-10-04 09:52:17,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-10-04 09:52:17,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2018-10-04 09:52:17,703 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 115 [2018-10-04 09:52:17,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:17,704 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2018-10-04 09:52:17,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-10-04 09:52:17,704 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2018-10-04 09:52:17,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-10-04 09:52:17,705 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:17,705 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 1, 1] [2018-10-04 09:52:17,705 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:17,705 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:17,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1445196178, now seen corresponding path program 57 times [2018-10-04 09:52:17,705 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:17,706 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:17,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:17,706 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:52:17,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:17,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:18,012 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:52:18,390 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:18,993 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:19,433 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 09:52:19,434 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:19,434 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 09:52:19,440 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:52:19,501 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-10-04 09:52:19,501 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:52:19,503 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:19,870 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:52:20,468 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:52:21,269 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:52:21,438 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 09:52:21,458 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:21,458 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 116 [2018-10-04 09:52:21,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-10-04 09:52:21,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-10-04 09:52:21,460 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:21,460 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 118 states. [2018-10-04 09:52:21,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:21,772 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-10-04 09:52:21,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-04 09:52:21,772 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 117 [2018-10-04 09:52:21,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:21,773 INFO L225 Difference]: With dead ends: 121 [2018-10-04 09:52:21,773 INFO L226 Difference]: Without dead ends: 120 [2018-10-04 09:52:21,773 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 09:52:21,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-10-04 09:52:21,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2018-10-04 09:52:21,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-10-04 09:52:21,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2018-10-04 09:52:21,778 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 117 [2018-10-04 09:52:21,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:21,778 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2018-10-04 09:52:21,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-10-04 09:52:21,778 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2018-10-04 09:52:21,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-10-04 09:52:21,779 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:21,779 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 1, 1] [2018-10-04 09:52:21,780 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:21,780 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:21,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1559091540, now seen corresponding path program 58 times [2018-10-04 09:52:21,780 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:21,780 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:21,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:21,781 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:52:21,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:21,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:22,041 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:52:22,274 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:22,646 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:23,119 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 09:52:23,120 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:23,120 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 09:52:23,130 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:52:23,164 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:52:23,164 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:52:23,167 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:23,734 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:52:24,120 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:52:24,651 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:52:24,819 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 09:52:24,838 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:24,839 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 118 [2018-10-04 09:52:24,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-10-04 09:52:24,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-10-04 09:52:24,840 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:24,840 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand 120 states. [2018-10-04 09:52:25,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:25,134 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-10-04 09:52:25,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-04 09:52:25,134 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 119 [2018-10-04 09:52:25,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:25,135 INFO L225 Difference]: With dead ends: 123 [2018-10-04 09:52:25,135 INFO L226 Difference]: Without dead ends: 122 [2018-10-04 09:52:25,135 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 09:52:25,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-10-04 09:52:25,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2018-10-04 09:52:25,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-10-04 09:52:25,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2018-10-04 09:52:25,139 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 119 [2018-10-04 09:52:25,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:25,139 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2018-10-04 09:52:25,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-10-04 09:52:25,140 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2018-10-04 09:52:25,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-10-04 09:52:25,140 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:25,140 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 1, 1] [2018-10-04 09:52:25,141 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:25,141 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:25,141 INFO L82 PathProgramCache]: Analyzing trace with hash -656615274, now seen corresponding path program 59 times [2018-10-04 09:52:25,141 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:25,141 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:25,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:25,142 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:52:25,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:25,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:26,136 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:52:26,420 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:26,779 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:27,337 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 09:52:27,338 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:27,338 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:52:27,346 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:52:27,409 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-10-04 09:52:27,409 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:52:27,412 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:27,975 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:52:28,629 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:52:29,433 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:52:29,747 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 09:52:29,767 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:29,767 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 120 [2018-10-04 09:52:29,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-10-04 09:52:29,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-10-04 09:52:29,769 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:29,769 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 122 states. [2018-10-04 09:52:30,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:30,212 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-10-04 09:52:30,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-04 09:52:30,212 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 121 [2018-10-04 09:52:30,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:30,213 INFO L225 Difference]: With dead ends: 125 [2018-10-04 09:52:30,214 INFO L226 Difference]: Without dead ends: 124 [2018-10-04 09:52:30,214 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s Time 3.5s impTime 13 [2018-10-04 09:52:30,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-10-04 09:52:30,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2018-10-04 09:52:30,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-10-04 09:52:30,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2018-10-04 09:52:30,218 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 121 [2018-10-04 09:52:30,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:30,219 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2018-10-04 09:52:30,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-10-04 09:52:30,219 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2018-10-04 09:52:30,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-10-04 09:52:30,219 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:30,220 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 1, 1] [2018-10-04 09:52:30,220 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:30,220 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:30,220 INFO L82 PathProgramCache]: Analyzing trace with hash 352915288, now seen corresponding path program 60 times [2018-10-04 09:52:30,220 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:30,220 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:30,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:30,221 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:52:30,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:30,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:30,540 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:52:30,784 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:31,243 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:31,708 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 09:52:31,708 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:31,708 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:52:31,716 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:52:31,777 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-10-04 09:52:31,778 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:52:31,780 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:32,079 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:52:32,518 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:52:33,482 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:52:33,869 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 09:52:33,891 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:33,891 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 122 [2018-10-04 09:52:33,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-10-04 09:52:33,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-10-04 09:52:33,893 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:33,893 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 124 states. [2018-10-04 09:52:34,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:34,259 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-10-04 09:52:34,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-04 09:52:34,259 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 123 [2018-10-04 09:52:34,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:34,260 INFO L225 Difference]: With dead ends: 127 [2018-10-04 09:52:34,260 INFO L226 Difference]: Without dead ends: 126 [2018-10-04 09:52:34,260 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s Time 2.7s impTime 14 [2018-10-04 09:52:34,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-10-04 09:52:34,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2018-10-04 09:52:34,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-10-04 09:52:34,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2018-10-04 09:52:34,264 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 123 [2018-10-04 09:52:34,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:34,265 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2018-10-04 09:52:34,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-10-04 09:52:34,265 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2018-10-04 09:52:34,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-10-04 09:52:34,265 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:34,265 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 1, 1] [2018-10-04 09:52:34,266 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:34,266 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:34,266 INFO L82 PathProgramCache]: Analyzing trace with hash -150823526, now seen corresponding path program 61 times [2018-10-04 09:52:34,266 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:34,266 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:34,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:34,267 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:52:34,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:34,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:34,496 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:52:34,932 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:35,565 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:35,682 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 09:52:35,682 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:35,683 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:52:35,690 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:52:35,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:35,725 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:36,101 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:52:36,718 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:52:37,461 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:52:37,873 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 09:52:37,893 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:37,893 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 124 [2018-10-04 09:52:37,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-10-04 09:52:37,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-10-04 09:52:37,895 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:37,895 INFO L87 Difference]: Start difference. First operand 126 states and 126 transitions. Second operand 126 states. [2018-10-04 09:52:38,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:38,335 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-10-04 09:52:38,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-04 09:52:38,336 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 125 [2018-10-04 09:52:38,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:38,336 INFO L225 Difference]: With dead ends: 129 [2018-10-04 09:52:38,336 INFO L226 Difference]: Without dead ends: 128 [2018-10-04 09:52:38,337 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s Time 2.8s impTime 15 [2018-10-04 09:52:38,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-10-04 09:52:38,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2018-10-04 09:52:38,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-10-04 09:52:38,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2018-10-04 09:52:38,340 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 125 [2018-10-04 09:52:38,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:38,340 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2018-10-04 09:52:38,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-10-04 09:52:38,340 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2018-10-04 09:52:38,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-10-04 09:52:38,340 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:38,341 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 1, 1] [2018-10-04 09:52:38,341 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:38,341 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:38,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1087480668, now seen corresponding path program 62 times [2018-10-04 09:52:38,341 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:38,341 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:38,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:38,342 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:52:38,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:38,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:38,626 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:52:39,019 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:39,631 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:40,380 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 09:52:40,381 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:40,381 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 09:52:40,389 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:52:40,420 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:52:40,420 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:52:40,423 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:40,855 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:52:41,449 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:52:42,213 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:52:42,660 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 09:52:42,680 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:42,680 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 126 [2018-10-04 09:52:42,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-10-04 09:52:42,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-10-04 09:52:42,682 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:42,682 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 128 states. [2018-10-04 09:52:43,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:43,032 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-10-04 09:52:43,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-04 09:52:43,033 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 127 [2018-10-04 09:52:43,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:43,034 INFO L225 Difference]: With dead ends: 131 [2018-10-04 09:52:43,034 INFO L226 Difference]: Without dead ends: 130 [2018-10-04 09:52:43,034 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 09:52:43,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-10-04 09:52:43,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2018-10-04 09:52:43,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-10-04 09:52:43,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 130 transitions. [2018-10-04 09:52:43,037 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 130 transitions. Word has length 127 [2018-10-04 09:52:43,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:43,038 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 130 transitions. [2018-10-04 09:52:43,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-10-04 09:52:43,038 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 130 transitions. [2018-10-04 09:52:43,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-10-04 09:52:43,038 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:43,039 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 1, 1] [2018-10-04 09:52:43,039 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:43,039 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:43,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1391870110, now seen corresponding path program 63 times [2018-10-04 09:52:43,039 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:43,039 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:43,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:43,040 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:52:43,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:43,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:43,391 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:52:43,764 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:44,359 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:45,164 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 09:52:45,164 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:45,164 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:52:45,175 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:52:45,240 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-10-04 09:52:45,241 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:52:45,243 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:45,616 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:52:46,205 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:52:46,959 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 9 [2018-10-04 09:52:47,472 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 09:52:47,492 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:47,492 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 128 [2018-10-04 09:52:47,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-10-04 09:52:47,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-10-04 09:52:47,494 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:47,494 INFO L87 Difference]: Start difference. First operand 130 states and 130 transitions. Second operand 130 states. [2018-10-04 09:52:47,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:47,842 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-10-04 09:52:47,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-04 09:52:47,842 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 129 [2018-10-04 09:52:47,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:47,843 INFO L225 Difference]: With dead ends: 133 [2018-10-04 09:52:47,843 INFO L226 Difference]: Without dead ends: 132 [2018-10-04 09:52:47,843 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s Time 3.5s impTime 18 [2018-10-04 09:52:47,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-10-04 09:52:47,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2018-10-04 09:52:47,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-10-04 09:52:47,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2018-10-04 09:52:47,848 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 129 [2018-10-04 09:52:47,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:47,849 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2018-10-04 09:52:47,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-10-04 09:52:47,849 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2018-10-04 09:52:47,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-10-04 09:52:47,850 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:47,850 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 1, 1] [2018-10-04 09:52:47,850 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:47,850 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:47,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1852347744, now seen corresponding path program 64 times [2018-10-04 09:52:47,850 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:47,851 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:47,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:47,851 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:52:47,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:47,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:48,111 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:52:48,814 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:49,528 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:50,065 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 09:52:50,065 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:50,065 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:52:50,077 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:52:50,113 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:52:50,113 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:52:50,116 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:50,488 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:52:51,121 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:52:51,955 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 9 [2018-10-04 09:52:52,583 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 09:52:52,603 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:52,604 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 130 [2018-10-04 09:52:52,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-10-04 09:52:52,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-10-04 09:52:52,605 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:52,605 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand 132 states. [2018-10-04 09:52:52,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:52,970 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-10-04 09:52:52,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-04 09:52:52,970 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 131 [2018-10-04 09:52:52,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:52,971 INFO L225 Difference]: With dead ends: 135 [2018-10-04 09:52:52,972 INFO L226 Difference]: Without dead ends: 134 [2018-10-04 09:52:52,972 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s Time 3.8s impTime 18 [2018-10-04 09:52:52,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-10-04 09:52:52,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2018-10-04 09:52:52,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-10-04 09:52:52,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2018-10-04 09:52:52,977 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 131 [2018-10-04 09:52:52,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:52,977 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2018-10-04 09:52:52,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-10-04 09:52:52,977 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2018-10-04 09:52:52,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-10-04 09:52:52,978 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:52,978 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 1, 1] [2018-10-04 09:52:52,978 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:52,978 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:52,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1989722530, now seen corresponding path program 65 times [2018-10-04 09:52:52,979 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:52,979 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:52,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:52,979 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:52:52,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:52,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:53,763 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:52:54,095 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:54,346 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:54,832 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 09:52:54,832 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:54,832 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 09:52:54,840 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:52:54,911 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-10-04 09:52:54,912 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:52:54,915 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:55,318 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:52:56,734 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:52:57,498 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 9 [2018-10-04 09:52:58,183 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 09:52:58,203 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:58,204 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 132 [2018-10-04 09:52:58,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-10-04 09:52:58,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-10-04 09:52:58,205 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:58,206 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand 134 states. [2018-10-04 09:52:58,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:58,690 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-10-04 09:52:58,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-04 09:52:58,690 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 133 [2018-10-04 09:52:58,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:58,691 INFO L225 Difference]: With dead ends: 137 [2018-10-04 09:52:58,691 INFO L226 Difference]: Without dead ends: 136 [2018-10-04 09:52:58,691 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7s Time 4.0s impTime 19 [2018-10-04 09:52:58,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-10-04 09:52:58,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2018-10-04 09:52:58,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-10-04 09:52:58,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2018-10-04 09:52:58,695 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 133 [2018-10-04 09:52:58,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:58,696 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2018-10-04 09:52:58,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-10-04 09:52:58,696 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2018-10-04 09:52:58,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-10-04 09:52:58,697 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:58,697 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 1, 1] [2018-10-04 09:52:58,697 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:58,697 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:58,697 INFO L82 PathProgramCache]: Analyzing trace with hash 862905700, now seen corresponding path program 66 times [2018-10-04 09:52:58,697 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:58,698 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:58,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:58,698 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:52:58,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:58,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:58,988 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:52:59,420 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:00,139 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:01,212 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 09:53:01,212 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:53:01,212 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 09:53:01,219 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:53:01,291 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-10-04 09:53:01,291 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:53:01,294 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:53:01,766 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:02,475 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:03,315 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 9 [2018-10-04 09:53:04,380 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 09:53:04,400 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:53:04,401 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 134 [2018-10-04 09:53:04,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-10-04 09:53:04,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-10-04 09:53:04,402 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:53:04,402 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand 136 states. [2018-10-04 09:53:04,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:53:04,862 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-10-04 09:53:04,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-04 09:53:04,862 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 135 [2018-10-04 09:53:04,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:53:04,863 INFO L225 Difference]: With dead ends: 139 [2018-10-04 09:53:04,863 INFO L226 Difference]: Without dead ends: 138 [2018-10-04 09:53:04,863 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1s Time 4.6s impTime 20 [2018-10-04 09:53:04,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-10-04 09:53:04,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2018-10-04 09:53:04,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-10-04 09:53:04,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2018-10-04 09:53:04,868 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 135 [2018-10-04 09:53:04,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:53:04,869 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2018-10-04 09:53:04,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-10-04 09:53:04,869 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2018-10-04 09:53:04,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-10-04 09:53:04,870 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:53:04,870 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 1, 1] [2018-10-04 09:53:04,870 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:53:04,870 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:53:04,870 INFO L82 PathProgramCache]: Analyzing trace with hash 323690662, now seen corresponding path program 67 times [2018-10-04 09:53:04,871 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:53:04,871 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:53:04,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:04,871 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:53:04,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:04,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:53:05,149 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:53:05,593 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:06,311 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:06,646 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:06,670 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 09:53:06,671 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:53:06,671 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 09:53:06,678 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:53:06,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:53:06,718 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:53:07,076 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:07,687 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:08,541 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:09,175 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 09:53:09,195 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:53:09,196 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 136 [2018-10-04 09:53:09,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-10-04 09:53:09,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-10-04 09:53:09,197 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:53:09,197 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand 138 states. [2018-10-04 09:53:09,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:53:09,640 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-10-04 09:53:09,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-04 09:53:09,641 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 137 [2018-10-04 09:53:09,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:53:09,641 INFO L225 Difference]: With dead ends: 141 [2018-10-04 09:53:09,641 INFO L226 Difference]: Without dead ends: 140 [2018-10-04 09:53:09,642 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s Time 3.2s impTime 23 [2018-10-04 09:53:09,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-10-04 09:53:09,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2018-10-04 09:53:09,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-10-04 09:53:09,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2018-10-04 09:53:09,645 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 137 [2018-10-04 09:53:09,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:53:09,645 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2018-10-04 09:53:09,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-10-04 09:53:09,645 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2018-10-04 09:53:09,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-10-04 09:53:09,646 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:53:09,646 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 1, 1] [2018-10-04 09:53:09,646 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:53:09,646 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:53:09,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1829081960, now seen corresponding path program 68 times [2018-10-04 09:53:09,646 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:53:09,647 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:53:09,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:09,647 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:53:09,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:09,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:53:09,853 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:53:10,329 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:10,730 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:11,910 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:12,012 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 09:53:12,012 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:53:12,012 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:53:12,019 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:53:12,058 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:53:12,058 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:53:12,060 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:53:12,411 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:12,979 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 9 [2018-10-04 09:53:13,925 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 26 new depth: 8 [2018-10-04 09:53:14,894 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 09:53:14,913 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:53:14,914 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 138 [2018-10-04 09:53:14,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 140 states [2018-10-04 09:53:14,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2018-10-04 09:53:14,915 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:53:14,915 INFO L87 Difference]: Start difference. First operand 140 states and 140 transitions. Second operand 140 states. [2018-10-04 09:53:15,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:53:15,311 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-10-04 09:53:15,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-04 09:53:15,311 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 139 [2018-10-04 09:53:15,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:53:15,312 INFO L225 Difference]: With dead ends: 143 [2018-10-04 09:53:15,312 INFO L226 Difference]: Without dead ends: 142 [2018-10-04 09:53:15,312 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s Time 4.1s impTime 24 [2018-10-04 09:53:15,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-10-04 09:53:15,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2018-10-04 09:53:15,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-10-04 09:53:15,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 142 transitions. [2018-10-04 09:53:15,316 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 142 transitions. Word has length 139 [2018-10-04 09:53:15,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:53:15,317 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 142 transitions. [2018-10-04 09:53:15,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has 140 states. [2018-10-04 09:53:15,317 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 142 transitions. [2018-10-04 09:53:15,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-10-04 09:53:15,317 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:53:15,317 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 1, 1] [2018-10-04 09:53:15,317 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:53:15,318 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:53:15,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1106140586, now seen corresponding path program 69 times [2018-10-04 09:53:15,318 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:53:15,318 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:53:15,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:15,318 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:53:15,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:15,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:53:15,507 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:53:15,825 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:16,354 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:17,272 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:17,412 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 09:53:17,412 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:53:17,412 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 09:53:17,419 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:53:17,494 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-10-04 09:53:17,494 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:53:17,496 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:53:17,762 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:18,301 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 9 [2018-10-04 09:53:19,334 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 26 new depth: 8 [2018-10-04 09:53:20,359 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 09:53:20,379 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:53:20,379 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 140 [2018-10-04 09:53:20,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-10-04 09:53:20,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-10-04 09:53:20,380 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:53:20,381 INFO L87 Difference]: Start difference. First operand 142 states and 142 transitions. Second operand 142 states. [2018-10-04 09:53:20,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:53:20,828 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-10-04 09:53:20,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-04 09:53:20,828 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 141 [2018-10-04 09:53:20,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:53:20,829 INFO L225 Difference]: With dead ends: 145 [2018-10-04 09:53:20,829 INFO L226 Difference]: Without dead ends: 144 [2018-10-04 09:53:20,829 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s Time 4.0s impTime 25 [2018-10-04 09:53:20,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-10-04 09:53:20,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2018-10-04 09:53:20,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-10-04 09:53:20,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 144 transitions. [2018-10-04 09:53:20,833 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 144 transitions. Word has length 141 [2018-10-04 09:53:20,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:53:20,833 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 144 transitions. [2018-10-04 09:53:20,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-10-04 09:53:20,833 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 144 transitions. [2018-10-04 09:53:20,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-10-04 09:53:20,834 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:53:20,834 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 1, 1] [2018-10-04 09:53:20,834 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:53:20,835 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:53:20,835 INFO L82 PathProgramCache]: Analyzing trace with hash 2144182124, now seen corresponding path program 70 times [2018-10-04 09:53:20,835 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:53:20,835 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:53:20,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:20,836 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:53:20,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:20,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:53:21,152 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:53:21,455 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:21,718 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:22,319 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:22,468 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 09:53:22,468 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:53:22,468 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 09:53:22,476 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:53:22,518 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:53:22,518 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:53:22,522 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:53:23,089 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:23,568 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 9 [2018-10-04 09:53:23,982 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 26 new depth: 8 [2018-10-04 09:53:24,844 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 09:53:24,863 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:53:24,864 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 142 [2018-10-04 09:53:24,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-10-04 09:53:24,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-10-04 09:53:24,865 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:53:24,866 INFO L87 Difference]: Start difference. First operand 144 states and 144 transitions. Second operand 144 states. [2018-10-04 09:53:25,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:53:25,282 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-10-04 09:53:25,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-04 09:53:25,283 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 143 [2018-10-04 09:53:25,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:53:25,283 INFO L225 Difference]: With dead ends: 147 [2018-10-04 09:53:25,283 INFO L226 Difference]: Without dead ends: 146 [2018-10-04 09:53:25,284 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s Time 3.0s impTime 27 [2018-10-04 09:53:25,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-10-04 09:53:25,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2018-10-04 09:53:25,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-10-04 09:53:25,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 146 transitions. [2018-10-04 09:53:25,287 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 146 transitions. Word has length 143 [2018-10-04 09:53:25,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:53:25,287 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 146 transitions. [2018-10-04 09:53:25,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-10-04 09:53:25,287 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 146 transitions. [2018-10-04 09:53:25,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-10-04 09:53:25,288 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:53:25,288 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 1, 1] [2018-10-04 09:53:25,288 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:53:25,288 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:53:25,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1025279826, now seen corresponding path program 71 times [2018-10-04 09:53:25,289 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:53:25,289 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:53:25,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:25,289 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:53:25,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:25,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:53:25,605 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:53:25,982 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:26,223 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:26,792 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:26,936 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 09:53:26,937 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:53:26,937 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 09:53:26,943 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:53:27,126 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-10-04 09:53:27,126 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:53:27,131 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:53:27,780 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:28,377 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 9 [2018-10-04 09:53:29,113 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 26 new depth: 8 [2018-10-04 09:53:30,458 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 09:53:30,480 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:53:30,480 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 144 [2018-10-04 09:53:30,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 146 states [2018-10-04 09:53:30,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2018-10-04 09:53:30,482 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:53:30,483 INFO L87 Difference]: Start difference. First operand 146 states and 146 transitions. Second operand 146 states. [2018-10-04 09:53:30,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:53:30,936 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-10-04 09:53:30,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-04 09:53:30,936 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 145 [2018-10-04 09:53:30,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:53:30,937 INFO L225 Difference]: With dead ends: 149 [2018-10-04 09:53:30,937 INFO L226 Difference]: Without dead ends: 148 [2018-10-04 09:53:30,937 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s Time 3.9s impTime 27 [2018-10-04 09:53:30,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-10-04 09:53:30,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2018-10-04 09:53:30,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-10-04 09:53:30,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2018-10-04 09:53:30,941 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 145 [2018-10-04 09:53:30,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:53:30,942 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2018-10-04 09:53:30,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has 146 states. [2018-10-04 09:53:30,942 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2018-10-04 09:53:30,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-10-04 09:53:30,943 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:53:30,943 INFO L375 BasicCegarLoop]: trace histogram [73, 72, 1, 1] [2018-10-04 09:53:30,943 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:53:30,943 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:53:30,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1746400912, now seen corresponding path program 72 times [2018-10-04 09:53:30,943 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:53:30,944 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:53:30,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:30,944 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:53:30,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:30,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:53:31,203 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:53:31,406 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:31,857 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:32,692 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:32,874 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 09:53:32,874 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:53:32,874 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 09:53:32,880 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:53:32,974 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-10-04 09:53:32,974 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:53:32,977 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:53:33,303 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:33,635 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 9 [2018-10-04 09:53:34,512 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 29 new depth: 9 [2018-10-04 09:53:35,170 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 09:53:35,191 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:53:35,191 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 146 [2018-10-04 09:53:35,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 148 states [2018-10-04 09:53:35,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2018-10-04 09:53:35,193 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:53:35,193 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 148 states. [2018-10-04 09:53:35,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:53:35,628 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-10-04 09:53:35,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-04 09:53:35,628 INFO L78 Accepts]: Start accepts. Automaton has 148 states. Word has length 147 [2018-10-04 09:53:35,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:53:35,629 INFO L225 Difference]: With dead ends: 151 [2018-10-04 09:53:35,629 INFO L226 Difference]: Without dead ends: 150 [2018-10-04 09:53:35,629 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s Time 3.1s impTime 24 [2018-10-04 09:53:35,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-10-04 09:53:35,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2018-10-04 09:53:35,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-10-04 09:53:35,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 150 transitions. [2018-10-04 09:53:35,634 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 150 transitions. Word has length 147 [2018-10-04 09:53:35,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:53:35,634 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 150 transitions. [2018-10-04 09:53:35,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has 148 states. [2018-10-04 09:53:35,634 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 150 transitions. [2018-10-04 09:53:35,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-10-04 09:53:35,635 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:53:35,635 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 1, 1] [2018-10-04 09:53:35,635 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:53:35,636 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:53:35,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1040937394, now seen corresponding path program 73 times [2018-10-04 09:53:35,636 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:53:35,636 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:53:35,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:35,637 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:53:35,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:35,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:53:35,930 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:53:36,376 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:37,040 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:38,123 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:38,564 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 09:53:38,564 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:53:38,564 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:53:38,572 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:53:38,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:53:38,611 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:53:38,931 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:39,823 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:40,584 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 9 [2018-10-04 09:53:41,976 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 29 new depth: 9 [2018-10-04 09:53:42,019 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 09:53:42,039 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:53:42,040 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 148 [2018-10-04 09:53:42,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 150 states [2018-10-04 09:53:42,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2018-10-04 09:53:42,041 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:53:42,042 INFO L87 Difference]: Start difference. First operand 150 states and 150 transitions. Second operand 150 states. [2018-10-04 09:53:42,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:53:42,516 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-10-04 09:53:42,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-04 09:53:42,517 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 149 [2018-10-04 09:53:42,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:53:42,517 INFO L225 Difference]: With dead ends: 153 [2018-10-04 09:53:42,517 INFO L226 Difference]: Without dead ends: 152 [2018-10-04 09:53:42,518 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.7s Time 5.2s impTime 9 [2018-10-04 09:53:42,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-10-04 09:53:42,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2018-10-04 09:53:42,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-10-04 09:53:42,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 152 transitions. [2018-10-04 09:53:42,523 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 152 transitions. Word has length 149 [2018-10-04 09:53:42,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:53:42,523 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 152 transitions. [2018-10-04 09:53:42,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has 150 states. [2018-10-04 09:53:42,523 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 152 transitions. [2018-10-04 09:53:42,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-10-04 09:53:42,524 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:53:42,524 INFO L375 BasicCegarLoop]: trace histogram [75, 74, 1, 1] [2018-10-04 09:53:42,524 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:53:42,524 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:53:42,524 INFO L82 PathProgramCache]: Analyzing trace with hash -386543244, now seen corresponding path program 74 times [2018-10-04 09:53:42,525 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:53:42,525 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:53:42,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:42,525 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:53:42,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:42,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:53:42,736 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:53:43,068 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:43,636 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:44,896 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:45,272 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 09:53:45,273 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:53:45,273 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:53:45,280 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:53:45,317 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:53:45,318 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:53:45,320 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:53:45,737 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:46,286 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:47,238 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 28 new depth: 9 [2018-10-04 09:53:48,390 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 28 new depth: 9 [2018-10-04 09:53:48,513 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 09:53:48,534 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:53:48,535 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 150 [2018-10-04 09:53:48,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 152 states [2018-10-04 09:53:48,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2018-10-04 09:53:48,536 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:53:48,536 INFO L87 Difference]: Start difference. First operand 152 states and 152 transitions. Second operand 152 states. [2018-10-04 09:53:48,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:53:48,991 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-10-04 09:53:48,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-04 09:53:48,991 INFO L78 Accepts]: Start accepts. Automaton has 152 states. Word has length 151 [2018-10-04 09:53:48,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:53:48,992 INFO L225 Difference]: With dead ends: 155 [2018-10-04 09:53:48,992 INFO L226 Difference]: Without dead ends: 154 [2018-10-04 09:53:48,992 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3s Time 4.8s impTime 10 [2018-10-04 09:53:48,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-10-04 09:53:48,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2018-10-04 09:53:48,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-10-04 09:53:48,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 154 transitions. [2018-10-04 09:53:48,996 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 154 transitions. Word has length 151 [2018-10-04 09:53:48,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:53:48,997 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 154 transitions. [2018-10-04 09:53:48,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has 152 states. [2018-10-04 09:53:48,997 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 154 transitions. [2018-10-04 09:53:48,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-10-04 09:53:48,997 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:53:48,997 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 1, 1] [2018-10-04 09:53:48,998 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:53:48,998 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:53:48,998 INFO L82 PathProgramCache]: Analyzing trace with hash -2100868938, now seen corresponding path program 75 times [2018-10-04 09:53:48,998 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:53:48,998 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:53:48,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:48,999 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:53:48,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:49,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:53:49,203 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:53:49,494 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:50,205 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:51,092 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:51,593 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 09:53:51,593 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:53:51,593 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 09:53:51,601 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:53:51,686 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-10-04 09:53:51,686 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:53:51,689 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:53:52,263 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:52,860 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:53,641 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 28 new depth: 9 [2018-10-04 09:53:54,992 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 28 new depth: 9 [2018-10-04 09:53:55,037 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 09:53:55,057 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:53:55,058 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 152 [2018-10-04 09:53:55,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 154 states [2018-10-04 09:53:55,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2018-10-04 09:53:55,059 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:53:55,060 INFO L87 Difference]: Start difference. First operand 154 states and 154 transitions. Second operand 154 states. [2018-10-04 09:53:55,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:53:55,505 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-10-04 09:53:55,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-04 09:53:55,506 INFO L78 Accepts]: Start accepts. Automaton has 154 states. Word has length 153 [2018-10-04 09:53:55,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:53:55,507 INFO L225 Difference]: With dead ends: 157 [2018-10-04 09:53:55,507 INFO L226 Difference]: Without dead ends: 156 [2018-10-04 09:53:55,507 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s Time 4.0s impTime 9 [2018-10-04 09:53:55,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-10-04 09:53:55,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2018-10-04 09:53:55,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-10-04 09:53:55,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 156 transitions. [2018-10-04 09:53:55,511 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 156 transitions. Word has length 153 [2018-10-04 09:53:55,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:53:55,511 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 156 transitions. [2018-10-04 09:53:55,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has 154 states. [2018-10-04 09:53:55,511 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 156 transitions. [2018-10-04 09:53:55,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-10-04 09:53:55,512 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:53:55,512 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 1, 1] [2018-10-04 09:53:55,512 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:53:55,512 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:53:55,512 INFO L82 PathProgramCache]: Analyzing trace with hash -300419208, now seen corresponding path program 76 times [2018-10-04 09:53:55,513 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:53:55,513 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:53:55,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:55,513 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:53:55,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:55,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:53:55,824 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:53:56,299 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:56,962 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:57,751 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:57,886 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 09:53:57,886 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:53:57,886 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 09:53:57,892 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:53:57,934 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:53:57,934 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:53:57,937 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:53:58,296 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:58,928 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:59,929 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 28 new depth: 9 [2018-10-04 09:54:00,801 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 28 new depth: 9 [2018-10-04 09:54:00,901 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 09:54:00,921 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:54:00,921 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 154 [2018-10-04 09:54:00,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 156 states [2018-10-04 09:54:00,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2018-10-04 09:54:00,923 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:54:00,923 INFO L87 Difference]: Start difference. First operand 156 states and 156 transitions. Second operand 156 states. [2018-10-04 09:54:01,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:54:01,389 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-10-04 09:54:01,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-04 09:54:01,389 INFO L78 Accepts]: Start accepts. Automaton has 156 states. Word has length 155 [2018-10-04 09:54:01,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:54:01,390 INFO L225 Difference]: With dead ends: 159 [2018-10-04 09:54:01,390 INFO L226 Difference]: Without dead ends: 158 [2018-10-04 09:54:01,390 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6s Time 4.2s impTime 11 [2018-10-04 09:54:01,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-10-04 09:54:01,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2018-10-04 09:54:01,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-10-04 09:54:01,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 158 transitions. [2018-10-04 09:54:01,394 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 158 transitions. Word has length 155 [2018-10-04 09:54:01,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:54:01,394 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 158 transitions. [2018-10-04 09:54:01,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has 156 states. [2018-10-04 09:54:01,394 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 158 transitions. [2018-10-04 09:54:01,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-10-04 09:54:01,395 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:54:01,395 INFO L375 BasicCegarLoop]: trace histogram [78, 77, 1, 1] [2018-10-04 09:54:01,395 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:54:01,395 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:54:01,395 INFO L82 PathProgramCache]: Analyzing trace with hash -940048966, now seen corresponding path program 77 times [2018-10-04 09:54:01,395 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:54:01,395 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:54:01,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:54:01,396 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:54:01,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:54:01,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:54:01,644 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:54:02,074 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:54:02,411 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:54:03,521 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:04,190 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 09:54:04,191 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:54:04,191 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:54:04,197 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:54:04,290 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-10-04 09:54:04,290 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:54:04,294 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:54:04,640 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:05,557 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:06,460 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 28 new depth: 9 [2018-10-04 09:54:07,685 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 28 new depth: 9 [2018-10-04 09:54:07,955 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 09:54:07,976 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:54:07,976 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 156 [2018-10-04 09:54:07,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 158 states [2018-10-04 09:54:07,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2018-10-04 09:54:07,978 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:54:07,978 INFO L87 Difference]: Start difference. First operand 158 states and 158 transitions. Second operand 158 states. [2018-10-04 09:54:08,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:54:08,503 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-10-04 09:54:08,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-04 09:54:08,503 INFO L78 Accepts]: Start accepts. Automaton has 158 states. Word has length 157 [2018-10-04 09:54:08,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:54:08,504 INFO L225 Difference]: With dead ends: 161 [2018-10-04 09:54:08,505 INFO L226 Difference]: Without dead ends: 160 [2018-10-04 09:54:08,505 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.8s Time 5.4s impTime 13 [2018-10-04 09:54:08,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-10-04 09:54:08,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2018-10-04 09:54:08,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-10-04 09:54:08,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 160 transitions. [2018-10-04 09:54:08,510 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 160 transitions. Word has length 157 [2018-10-04 09:54:08,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:54:08,510 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 160 transitions. [2018-10-04 09:54:08,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has 158 states. [2018-10-04 09:54:08,510 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 160 transitions. [2018-10-04 09:54:08,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-10-04 09:54:08,511 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:54:08,511 INFO L375 BasicCegarLoop]: trace histogram [79, 78, 1, 1] [2018-10-04 09:54:08,512 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:54:08,512 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:54:08,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1443923076, now seen corresponding path program 78 times [2018-10-04 09:54:08,512 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:54:08,512 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:54:08,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:54:08,513 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:54:08,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:54:08,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:54:08,785 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:54:09,211 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:54:09,886 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:54:11,054 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:11,866 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 09:54:11,867 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:54:11,867 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 09:54:11,875 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:54:12,004 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-10-04 09:54:12,005 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:54:12,008 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:54:12,336 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:13,040 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 9 [2018-10-04 09:54:14,000 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 29 new depth: 9 [2018-10-04 09:54:15,252 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 28 new depth: 9 [2018-10-04 09:54:15,642 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 09:54:15,662 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:54:15,662 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 158 [2018-10-04 09:54:15,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 160 states [2018-10-04 09:54:15,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2018-10-04 09:54:15,664 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:54:15,664 INFO L87 Difference]: Start difference. First operand 160 states and 160 transitions. Second operand 160 states. [2018-10-04 09:54:16,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:54:16,217 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-10-04 09:54:16,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-04 09:54:16,217 INFO L78 Accepts]: Start accepts. Automaton has 160 states. Word has length 159 [2018-10-04 09:54:16,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:54:16,218 INFO L225 Difference]: With dead ends: 163 [2018-10-04 09:54:16,218 INFO L226 Difference]: Without dead ends: 162 [2018-10-04 09:54:16,219 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.3s Time 5.8s impTime 12 [2018-10-04 09:54:16,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-10-04 09:54:16,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2018-10-04 09:54:16,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2018-10-04 09:54:16,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 162 transitions. [2018-10-04 09:54:16,223 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 162 transitions. Word has length 159 [2018-10-04 09:54:16,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:54:16,223 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 162 transitions. [2018-10-04 09:54:16,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has 160 states. [2018-10-04 09:54:16,223 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 162 transitions. [2018-10-04 09:54:16,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-10-04 09:54:16,224 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:54:16,224 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 1, 1] [2018-10-04 09:54:16,224 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:54:16,224 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:54:16,225 INFO L82 PathProgramCache]: Analyzing trace with hash -335638338, now seen corresponding path program 79 times [2018-10-04 09:54:16,225 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:54:16,225 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:54:16,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:54:16,225 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:54:16,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:54:16,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:54:16,638 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:54:17,101 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:54:17,764 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:54:18,844 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:19,739 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 09:54:19,739 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:54:19,739 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:54:19,746 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:54:19,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:54:19,788 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:54:20,126 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:21,027 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:21,923 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 28 new depth: 9 [2018-10-04 09:54:23,158 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 28 new depth: 9 [2018-10-04 09:54:23,549 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 09:54:23,568 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:54:23,568 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 160 [2018-10-04 09:54:23,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 162 states [2018-10-04 09:54:23,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2018-10-04 09:54:23,570 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:54:23,570 INFO L87 Difference]: Start difference. First operand 162 states and 162 transitions. Second operand 162 states. [2018-10-04 09:54:24,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:54:24,117 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-10-04 09:54:24,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-04 09:54:24,118 INFO L78 Accepts]: Start accepts. Automaton has 162 states. Word has length 161 [2018-10-04 09:54:24,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:54:24,118 INFO L225 Difference]: With dead ends: 165 [2018-10-04 09:54:24,118 INFO L226 Difference]: Without dead ends: 164 [2018-10-04 09:54:24,119 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.6s Time 6.1s impTime 15 [2018-10-04 09:54:24,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-10-04 09:54:24,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2018-10-04 09:54:24,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-10-04 09:54:24,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 164 transitions. [2018-10-04 09:54:24,125 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 164 transitions. Word has length 161 [2018-10-04 09:54:24,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:54:24,125 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 164 transitions. [2018-10-04 09:54:24,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has 162 states. [2018-10-04 09:54:24,125 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 164 transitions. [2018-10-04 09:54:24,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-10-04 09:54:24,126 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:54:24,126 INFO L375 BasicCegarLoop]: trace histogram [81, 80, 1, 1] [2018-10-04 09:54:24,126 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:54:24,126 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:54:24,126 INFO L82 PathProgramCache]: Analyzing trace with hash -425894528, now seen corresponding path program 80 times [2018-10-04 09:54:24,127 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:54:24,127 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:54:24,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:54:24,127 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:54:24,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:54:24,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:54:24,342 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:54:24,766 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:54:25,276 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 Received shutdown request... [2018-10-04 09:54:25,901 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-04 09:54:25,906 WARN L205 ceAbstractionStarter]: Timeout [2018-10-04 09:54:25,906 INFO L202 PluginConnector]: Adding new model LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.10 09:54:25 BoogieIcfgContainer [2018-10-04 09:54:25,906 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-04 09:54:25,907 INFO L168 Benchmark]: Toolchain (without parser) took 237421.80 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -65.5 MB). Free memory was 1.5 GB in the beginning and 954.5 MB in the end (delta: 507.0 MB). Peak memory consumption was 441.4 MB. Max. memory is 7.1 GB. [2018-10-04 09:54:25,908 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.28 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 09:54:25,909 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.29 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 09:54:25,909 INFO L168 Benchmark]: Boogie Preprocessor took 26.72 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 09:54:25,910 INFO L168 Benchmark]: RCFGBuilder took 287.10 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-04 09:54:25,910 INFO L168 Benchmark]: TraceAbstraction took 237058.25 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -65.5 MB). Free memory was 1.4 GB in the beginning and 954.5 MB in the end (delta: 485.8 MB). Peak memory consumption was 420.3 MB. Max. memory is 7.1 GB. [2018-10-04 09:54:25,914 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 0.28 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 45.29 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 26.72 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 287.10 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 237058.25 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -65.5 MB). Free memory was 1.4 GB in the beginning and 954.5 MB in the end (delta: 485.8 MB). Peak memory consumption was 420.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 16]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 16). Cancelled while BasicCegarLoop was analyzing trace of length 164 with TraceHistMax 81, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while NestedInterpolantsBuilder was constructing predicates for 162 interpolants. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 236.9s OverallTime, 81 OverallIterations, 81 TraceHistogramMax, 21.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 162 SDtfs, 0 SDslu, 1 SDs, 0 SdLazy, 13408 SolverSat, 229 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 13.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9718 GetRequests, 3239 SyntacticMatches, 0 SemanticMatches, 6479 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 183.3s 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, 3.8s SatisfiabilityAnalysisTime, 205.0s InterpolantComputationTime, 13117 NumberOfCodeBlocks, 13117 NumberOfCodeBlocksAsserted, 1771 NumberOfCheckSat, 12958 ConstructedInterpolants, 0 QuantifiedInterpolants, 8346212 SizeOfPredicates, 0 NumberOfNonLiveVariables, 13272 ConjunctsInSsa, 3397 ConjunctsInUnsatCore, 159 InterpolantComputations, 1 PerfectInterpolantSequences, 0/341280 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/LexIndexValue-Pointer-Reduced.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-04_09-54-25-926.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/LexIndexValue-Pointer-Reduced.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-04_09-54-25-926.csv Completed graceful shutdown