java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Luxembourg.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-4eac566 [2018-09-23 19:49:56,496 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-23 19:49:56,498 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-23 19:49:56,511 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-23 19:49:56,511 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-23 19:49:56,512 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-23 19:49:56,514 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-23 19:49:56,515 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-23 19:49:56,517 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-23 19:49:56,518 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-23 19:49:56,519 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-23 19:49:56,519 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-23 19:49:56,520 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-23 19:49:56,521 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-23 19:49:56,522 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-23 19:49:56,523 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-23 19:49:56,524 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-23 19:49:56,526 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-23 19:49:56,527 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-23 19:49:56,529 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-23 19:49:56,530 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-23 19:49:56,531 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-23 19:49:56,534 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-23 19:49:56,534 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-23 19:49:56,534 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-23 19:49:56,535 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-23 19:49:56,536 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-23 19:49:56,537 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-23 19:49:56,538 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-23 19:49:56,539 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-23 19:49:56,539 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-23 19:49:56,540 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-23 19:49:56,540 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-23 19:49:56,541 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-23 19:49:56,542 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-23 19:49:56,542 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-23 19:49:56,543 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-23 19:49:56,558 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-23 19:49:56,558 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-23 19:49:56,559 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-23 19:49:56,559 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-23 19:49:56,560 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-23 19:49:56,560 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-23 19:49:56,560 INFO L133 SettingsManager]: * Use SBE=true [2018-09-23 19:49:56,560 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-23 19:49:56,561 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-23 19:49:56,561 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-23 19:49:56,561 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-23 19:49:56,561 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-23 19:49:56,561 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-23 19:49:56,561 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-23 19:49:56,562 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-23 19:49:56,562 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-23 19:49:56,562 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-23 19:49:56,562 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-23 19:49:56,562 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-23 19:49:56,563 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-23 19:49:56,563 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-23 19:49:56,563 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-23 19:49:56,563 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 19:49:56,563 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-23 19:49:56,564 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-23 19:49:56,564 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-23 19:49:56,564 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-23 19:49:56,564 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-23 19:49:56,564 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-23 19:49:56,565 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-23 19:49:56,607 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-23 19:49:56,623 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-23 19:49:56,629 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-23 19:49:56,630 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-23 19:49:56,631 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-23 19:49:56,632 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Luxembourg.bpl [2018-09-23 19:49:56,632 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Luxembourg.bpl' [2018-09-23 19:49:56,678 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-23 19:49:56,682 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-23 19:49:56,683 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-23 19:49:56,683 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-23 19:49:56,685 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-23 19:49:56,707 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "Luxembourg.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:49:56" (1/1) ... [2018-09-23 19:49:56,721 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "Luxembourg.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:49:56" (1/1) ... [2018-09-23 19:49:56,726 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-23 19:49:56,726 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-23 19:49:56,726 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-23 19:49:56,728 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-23 19:49:56,729 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-23 19:49:56,729 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-23 19:49:56,730 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-23 19:49:56,742 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "Luxembourg.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:49:56" (1/1) ... [2018-09-23 19:49:56,742 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "Luxembourg.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:49:56" (1/1) ... [2018-09-23 19:49:56,742 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "Luxembourg.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:49:56" (1/1) ... [2018-09-23 19:49:56,743 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "Luxembourg.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:49:56" (1/1) ... [2018-09-23 19:49:56,747 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "Luxembourg.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:49:56" (1/1) ... [2018-09-23 19:49:56,754 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "Luxembourg.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:49:56" (1/1) ... [2018-09-23 19:49:56,755 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "Luxembourg.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:49:56" (1/1) ... [2018-09-23 19:49:56,756 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-23 19:49:56,757 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-23 19:49:56,758 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-23 19:49:56,758 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-23 19:49:56,760 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "Luxembourg.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:49:56" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 19:49:56,837 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-09-23 19:49:56,838 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-23 19:49:56,838 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-23 19:49:57,036 INFO L351 CfgBuilder]: Using library mode [2018-09-23 19:49:57,036 INFO L202 PluginConnector]: Adding new model Luxembourg.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 07:49:57 BoogieIcfgContainer [2018-09-23 19:49:57,037 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-23 19:49:57,038 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-23 19:49:57,038 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-23 19:49:57,041 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-23 19:49:57,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Luxembourg.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:49:56" (1/2) ... [2018-09-23 19:49:57,043 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@317c8d2b and model type Luxembourg.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.09 07:49:57, skipping insertion in model container [2018-09-23 19:49:57,043 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Luxembourg.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 07:49:57" (2/2) ... [2018-09-23 19:49:57,045 INFO L112 eAbstractionObserver]: Analyzing ICFG Luxembourg.bpl [2018-09-23 19:49:57,055 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-23 19:49:57,063 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-23 19:49:57,114 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-23 19:49:57,114 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-23 19:49:57,115 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-23 19:49:57,115 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-23 19:49:57,115 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-23 19:49:57,115 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-23 19:49:57,116 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-23 19:49:57,116 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-23 19:49:57,116 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-23 19:49:57,131 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-09-23 19:49:57,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-23 19:49:57,141 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:57,142 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-23 19:49:57,144 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:57,154 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:57,154 INFO L82 PathProgramCache]: Analyzing trace with hash 30048, now seen corresponding path program 1 times [2018-09-23 19:49:57,156 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:57,157 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:57,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:57,208 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:49:57,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:57,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:57,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:57,298 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 19:49:57,298 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-23 19:49:57,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-23 19:49:57,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-23 19:49:57,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 19:49:57,316 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-09-23 19:49:57,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:57,366 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2018-09-23 19:49:57,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-23 19:49:57,368 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-23 19:49:57,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:57,379 INFO L225 Difference]: With dead ends: 13 [2018-09-23 19:49:57,379 INFO L226 Difference]: Without dead ends: 5 [2018-09-23 19:49:57,384 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 19:49:57,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-09-23 19:49:57,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-09-23 19:49:57,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-09-23 19:49:57,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-09-23 19:49:57,420 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-09-23 19:49:57,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:57,421 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-09-23 19:49:57,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-23 19:49:57,421 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-09-23 19:49:57,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-23 19:49:57,421 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:57,422 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-23 19:49:57,422 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:57,422 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:57,422 INFO L82 PathProgramCache]: Analyzing trace with hash 927622, now seen corresponding path program 1 times [2018-09-23 19:49:57,423 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:57,423 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:57,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:57,424 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:49:57,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:57,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:57,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:57,563 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:57,563 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:49:57,588 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:49:57,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:57,606 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:57,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:57,647 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:57,648 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-23 19:49:57,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-23 19:49:57,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-23 19:49:57,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-23 19:49:57,649 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 4 states. [2018-09-23 19:49:57,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:57,720 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-09-23 19:49:57,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-23 19:49:57,721 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-09-23 19:49:57,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:57,721 INFO L225 Difference]: With dead ends: 8 [2018-09-23 19:49:57,721 INFO L226 Difference]: Without dead ends: 6 [2018-09-23 19:49:57,722 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-23 19:49:57,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-23 19:49:57,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-23 19:49:57,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-23 19:49:57,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-23 19:49:57,726 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-09-23 19:49:57,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:57,727 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-23 19:49:57,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-23 19:49:57,727 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-23 19:49:57,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-23 19:49:57,728 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:57,728 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-09-23 19:49:57,728 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:57,728 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:57,729 INFO L82 PathProgramCache]: Analyzing trace with hash 28752416, now seen corresponding path program 2 times [2018-09-23 19:49:57,729 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:57,729 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:57,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:57,730 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:49:57,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:57,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:57,786 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:57,787 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:57,787 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:49:57,796 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:49:57,812 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:49:57,813 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:57,814 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:57,820 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:57,840 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:57,840 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-23 19:49:57,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-23 19:49:57,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-23 19:49:57,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-23 19:49:57,842 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 5 states. [2018-09-23 19:49:57,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:57,895 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-23 19:49:57,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-23 19:49:57,896 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2018-09-23 19:49:57,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:57,896 INFO L225 Difference]: With dead ends: 9 [2018-09-23 19:49:57,896 INFO L226 Difference]: Without dead ends: 7 [2018-09-23 19:49:57,897 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-23 19:49:57,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-23 19:49:57,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-23 19:49:57,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-23 19:49:57,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-23 19:49:57,900 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-09-23 19:49:57,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:57,900 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-23 19:49:57,900 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-23 19:49:57,901 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-23 19:49:57,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-23 19:49:57,902 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:57,902 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2018-09-23 19:49:57,902 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:57,902 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:57,902 INFO L82 PathProgramCache]: Analyzing trace with hash 891321030, now seen corresponding path program 3 times [2018-09-23 19:49:57,903 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:57,903 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:57,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:57,905 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:57,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:57,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:57,992 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:57,993 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:57,993 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:49:58,001 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:49:58,015 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-23 19:49:58,015 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:58,016 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:58,022 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:58,042 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:58,042 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-23 19:49:58,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-23 19:49:58,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-23 19:49:58,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-23 19:49:58,044 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2018-09-23 19:49:58,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:58,102 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-09-23 19:49:58,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-23 19:49:58,103 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2018-09-23 19:49:58,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:58,104 INFO L225 Difference]: With dead ends: 10 [2018-09-23 19:49:58,104 INFO L226 Difference]: Without dead ends: 8 [2018-09-23 19:49:58,105 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-23 19:49:58,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-23 19:49:58,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-23 19:49:58,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-23 19:49:58,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-23 19:49:58,107 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-09-23 19:49:58,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:58,107 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-23 19:49:58,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-23 19:49:58,108 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-23 19:49:58,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-23 19:49:58,108 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:58,108 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1, 1] [2018-09-23 19:49:58,108 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:58,109 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:58,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1861144288, now seen corresponding path program 4 times [2018-09-23 19:49:58,109 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:58,109 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:58,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:58,110 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:58,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:58,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:58,325 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:58,326 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:58,326 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:49:58,342 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:49:58,384 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:49:58,385 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:58,386 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:58,395 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:58,420 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:58,420 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-23 19:49:58,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-23 19:49:58,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-23 19:49:58,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-23 19:49:58,421 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states. [2018-09-23 19:49:58,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:58,456 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-23 19:49:58,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-23 19:49:58,457 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-09-23 19:49:58,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:58,457 INFO L225 Difference]: With dead ends: 11 [2018-09-23 19:49:58,457 INFO L226 Difference]: Without dead ends: 9 [2018-09-23 19:49:58,458 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-23 19:49:58,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-23 19:49:58,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-23 19:49:58,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-23 19:49:58,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-23 19:49:58,461 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-09-23 19:49:58,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:58,461 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-23 19:49:58,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-23 19:49:58,462 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-23 19:49:58,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-23 19:49:58,462 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:58,462 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1] [2018-09-23 19:49:58,463 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:58,463 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:58,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1860894214, now seen corresponding path program 5 times [2018-09-23 19:49:58,463 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:58,463 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:58,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:58,464 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:58,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:58,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:58,614 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:58,615 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:58,615 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:49:58,633 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:49:58,648 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-23 19:49:58,649 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:58,650 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:58,665 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:58,687 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:58,687 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-23 19:49:58,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 19:49:58,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 19:49:58,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:49:58,689 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 8 states. [2018-09-23 19:49:58,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:58,754 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-09-23 19:49:58,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 19:49:58,755 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2018-09-23 19:49:58,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:58,756 INFO L225 Difference]: With dead ends: 12 [2018-09-23 19:49:58,757 INFO L226 Difference]: Without dead ends: 10 [2018-09-23 19:49:58,758 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:49:58,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-23 19:49:58,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-23 19:49:58,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-23 19:49:58,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-23 19:49:58,761 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-09-23 19:49:58,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:58,762 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-23 19:49:58,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 19:49:58,762 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-23 19:49:58,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-23 19:49:58,763 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:58,763 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1, 1] [2018-09-23 19:49:58,763 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:58,763 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:58,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1853141920, now seen corresponding path program 6 times [2018-09-23 19:49:58,764 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:58,764 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:58,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:58,766 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:58,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:58,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:58,983 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:58,984 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:58,984 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:49:58,992 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:49:59,003 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-23 19:49:59,003 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:59,005 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:59,013 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:59,035 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:59,036 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:49:59,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:49:59,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:49:59,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:49:59,037 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 9 states. [2018-09-23 19:49:59,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:59,064 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-23 19:49:59,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:49:59,065 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2018-09-23 19:49:59,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:59,066 INFO L225 Difference]: With dead ends: 13 [2018-09-23 19:49:59,066 INFO L226 Difference]: Without dead ends: 11 [2018-09-23 19:49:59,067 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:49:59,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-23 19:49:59,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-23 19:49:59,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-23 19:49:59,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-23 19:49:59,072 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-09-23 19:49:59,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:59,072 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-23 19:49:59,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:49:59,072 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-23 19:49:59,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-23 19:49:59,073 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:59,073 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1] [2018-09-23 19:49:59,073 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:59,073 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:59,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1612820806, now seen corresponding path program 7 times [2018-09-23 19:49:59,074 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:59,074 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:59,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:59,075 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:59,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:59,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:59,186 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:59,187 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:59,187 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:49:59,197 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:49:59,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:59,220 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:59,228 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:59,257 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:59,257 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:49:59,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:49:59,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:49:59,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:49:59,258 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-09-23 19:49:59,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:59,483 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-09-23 19:49:59,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:49:59,485 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2018-09-23 19:49:59,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:59,486 INFO L225 Difference]: With dead ends: 14 [2018-09-23 19:49:59,486 INFO L226 Difference]: Without dead ends: 12 [2018-09-23 19:49:59,486 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:49:59,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-23 19:49:59,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-23 19:49:59,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-23 19:49:59,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-23 19:49:59,492 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-09-23 19:49:59,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:59,492 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-23 19:49:59,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:49:59,492 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-23 19:49:59,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-23 19:49:59,493 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:59,493 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1, 1] [2018-09-23 19:49:59,493 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:59,495 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:59,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1542166432, now seen corresponding path program 8 times [2018-09-23 19:49:59,495 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:59,496 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:59,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:59,498 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:49:59,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:59,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:59,708 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:59,709 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:59,709 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:49:59,720 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:49:59,736 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:49:59,737 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:59,739 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:59,747 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:59,770 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:59,770 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:49:59,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:49:59,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:49:59,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:49:59,772 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 11 states. [2018-09-23 19:49:59,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:59,814 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-23 19:49:59,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:49:59,815 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2018-09-23 19:49:59,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:59,815 INFO L225 Difference]: With dead ends: 15 [2018-09-23 19:49:59,816 INFO L226 Difference]: Without dead ends: 13 [2018-09-23 19:49:59,816 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:49:59,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-23 19:49:59,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-23 19:49:59,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-23 19:49:59,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-23 19:49:59,820 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-09-23 19:49:59,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:59,820 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-23 19:49:59,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:49:59,821 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-23 19:49:59,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-23 19:49:59,821 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:59,821 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1] [2018-09-23 19:49:59,821 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:59,822 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:59,822 INFO L82 PathProgramCache]: Analyzing trace with hash -562523002, now seen corresponding path program 9 times [2018-09-23 19:49:59,822 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:59,822 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:59,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:59,823 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:59,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:59,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:59,975 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:59,976 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:59,976 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:49:59,987 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:50:00,024 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-23 19:50:00,025 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:00,027 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:00,036 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:00,058 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:00,058 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-23 19:50:00,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-23 19:50:00,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-23 19:50:00,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-23 19:50:00,059 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states. [2018-09-23 19:50:00,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:00,093 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-09-23 19:50:00,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-23 19:50:00,093 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2018-09-23 19:50:00,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:00,094 INFO L225 Difference]: With dead ends: 16 [2018-09-23 19:50:00,094 INFO L226 Difference]: Without dead ends: 14 [2018-09-23 19:50:00,095 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-23 19:50:00,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-23 19:50:00,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-23 19:50:00,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-23 19:50:00,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-23 19:50:00,098 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-09-23 19:50:00,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:00,098 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-23 19:50:00,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-23 19:50:00,098 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-23 19:50:00,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-23 19:50:00,099 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:00,099 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1, 1] [2018-09-23 19:50:00,099 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:00,100 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:00,100 INFO L82 PathProgramCache]: Analyzing trace with hash -258347744, now seen corresponding path program 10 times [2018-09-23 19:50:00,100 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:00,100 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:00,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:00,101 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:00,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:00,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:00,423 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:00,423 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:00,423 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:00,432 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:50:00,448 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:50:00,449 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:00,450 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:00,459 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:00,485 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:00,485 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-23 19:50:00,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-23 19:50:00,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-23 19:50:00,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-23 19:50:00,487 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 13 states. [2018-09-23 19:50:00,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:00,549 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-23 19:50:00,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-23 19:50:00,550 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 13 [2018-09-23 19:50:00,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:00,551 INFO L225 Difference]: With dead ends: 17 [2018-09-23 19:50:00,551 INFO L226 Difference]: Without dead ends: 15 [2018-09-23 19:50:00,552 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-23 19:50:00,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-23 19:50:00,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-23 19:50:00,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-23 19:50:00,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-23 19:50:00,556 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-09-23 19:50:00,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:00,556 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-23 19:50:00,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-23 19:50:00,557 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-23 19:50:00,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-23 19:50:00,557 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:00,557 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1, 1] [2018-09-23 19:50:00,557 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:00,558 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:00,558 INFO L82 PathProgramCache]: Analyzing trace with hash 581150662, now seen corresponding path program 11 times [2018-09-23 19:50:00,558 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:00,558 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:00,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:00,559 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:00,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:00,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:00,774 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:00,774 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:00,774 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:00,783 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:50:00,834 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-23 19:50:00,834 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:00,836 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:00,855 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:00,876 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:00,877 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-23 19:50:00,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 19:50:00,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 19:50:00,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-23 19:50:00,878 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 14 states. [2018-09-23 19:50:00,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:00,915 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-09-23 19:50:00,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-23 19:50:00,916 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-09-23 19:50:00,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:00,916 INFO L225 Difference]: With dead ends: 18 [2018-09-23 19:50:00,916 INFO L226 Difference]: Without dead ends: 16 [2018-09-23 19:50:00,917 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-23 19:50:00,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-23 19:50:00,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-23 19:50:00,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-23 19:50:00,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-23 19:50:00,921 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-09-23 19:50:00,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:00,921 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-23 19:50:00,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 19:50:00,921 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-23 19:50:00,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:50:00,922 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:00,922 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1, 1] [2018-09-23 19:50:00,922 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:00,923 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:00,923 INFO L82 PathProgramCache]: Analyzing trace with hash 835797472, now seen corresponding path program 12 times [2018-09-23 19:50:00,923 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:00,923 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:00,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:00,924 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:00,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:00,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:01,116 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:01,116 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:01,116 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:01,125 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:50:01,138 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-23 19:50:01,138 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:01,140 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:01,161 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:01,185 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:01,185 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-23 19:50:01,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-23 19:50:01,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-23 19:50:01,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-23 19:50:01,186 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 15 states. [2018-09-23 19:50:01,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:01,234 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-23 19:50:01,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-23 19:50:01,235 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-09-23 19:50:01,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:01,235 INFO L225 Difference]: With dead ends: 19 [2018-09-23 19:50:01,235 INFO L226 Difference]: Without dead ends: 17 [2018-09-23 19:50:01,236 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-23 19:50:01,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-23 19:50:01,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-23 19:50:01,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-23 19:50:01,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-23 19:50:01,239 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-09-23 19:50:01,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:01,240 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-23 19:50:01,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-23 19:50:01,240 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-23 19:50:01,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-23 19:50:01,241 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:01,241 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1, 1] [2018-09-23 19:50:01,241 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:01,241 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:01,241 INFO L82 PathProgramCache]: Analyzing trace with hash 139913990, now seen corresponding path program 13 times [2018-09-23 19:50:01,241 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:01,241 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:01,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:01,242 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:01,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:01,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:01,560 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:01,560 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:01,560 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:01,572 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:01,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:01,584 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:01,594 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:01,616 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:01,616 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-23 19:50:01,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-23 19:50:01,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-23 19:50:01,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-23 19:50:01,617 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 16 states. [2018-09-23 19:50:01,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:01,854 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-09-23 19:50:01,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-23 19:50:01,854 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2018-09-23 19:50:01,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:01,855 INFO L225 Difference]: With dead ends: 20 [2018-09-23 19:50:01,855 INFO L226 Difference]: Without dead ends: 18 [2018-09-23 19:50:01,856 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-23 19:50:01,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-23 19:50:01,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-23 19:50:01,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-23 19:50:01,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-09-23 19:50:01,859 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-09-23 19:50:01,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:01,859 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-09-23 19:50:01,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-23 19:50:01,860 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-09-23 19:50:01,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:01,860 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:01,860 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1, 1] [2018-09-23 19:50:01,861 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:01,861 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:01,861 INFO L82 PathProgramCache]: Analyzing trace with hash 42362528, now seen corresponding path program 14 times [2018-09-23 19:50:01,861 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:01,861 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:01,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:01,862 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:01,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:01,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:02,176 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:02,176 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:02,177 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:02,191 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:50:02,204 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:50:02,204 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:02,206 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:02,215 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:02,236 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:02,236 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-23 19:50:02,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-23 19:50:02,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-23 19:50:02,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-23 19:50:02,237 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 17 states. [2018-09-23 19:50:02,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:02,289 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-23 19:50:02,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-23 19:50:02,290 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2018-09-23 19:50:02,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:02,290 INFO L225 Difference]: With dead ends: 21 [2018-09-23 19:50:02,290 INFO L226 Difference]: Without dead ends: 19 [2018-09-23 19:50:02,291 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-23 19:50:02,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-23 19:50:02,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-23 19:50:02,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-23 19:50:02,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-23 19:50:02,295 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-09-23 19:50:02,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:02,295 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-23 19:50:02,295 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-23 19:50:02,295 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-23 19:50:02,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 19:50:02,296 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:02,296 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1, 1] [2018-09-23 19:50:02,296 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:02,297 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:02,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1313234502, now seen corresponding path program 15 times [2018-09-23 19:50:02,297 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:02,297 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:02,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:02,298 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:02,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:02,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:02,595 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:02,596 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:02,596 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:02,605 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:50:02,636 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-23 19:50:02,637 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:02,639 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:02,648 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:02,671 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:02,672 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-23 19:50:02,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-23 19:50:02,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-23 19:50:02,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-23 19:50:02,673 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 18 states. [2018-09-23 19:50:02,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:02,720 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-09-23 19:50:02,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-23 19:50:02,720 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-09-23 19:50:02,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:02,721 INFO L225 Difference]: With dead ends: 22 [2018-09-23 19:50:02,721 INFO L226 Difference]: Without dead ends: 20 [2018-09-23 19:50:02,722 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-23 19:50:02,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-23 19:50:02,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-23 19:50:02,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-23 19:50:02,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-09-23 19:50:02,724 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-09-23 19:50:02,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:02,725 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-09-23 19:50:02,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-23 19:50:02,725 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-09-23 19:50:02,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:50:02,726 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:02,726 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1, 1] [2018-09-23 19:50:02,726 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:02,726 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:02,726 INFO L82 PathProgramCache]: Analyzing trace with hash 2055560032, now seen corresponding path program 16 times [2018-09-23 19:50:02,726 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:02,726 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:02,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:02,727 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:02,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:02,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:03,304 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:03,305 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:03,305 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:03,313 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:50:03,348 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:50:03,349 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:03,350 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:03,363 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:03,393 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:03,393 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-23 19:50:03,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-23 19:50:03,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-23 19:50:03,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-23 19:50:03,395 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 19 states. [2018-09-23 19:50:03,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:03,499 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-23 19:50:03,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-23 19:50:03,499 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2018-09-23 19:50:03,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:03,500 INFO L225 Difference]: With dead ends: 23 [2018-09-23 19:50:03,500 INFO L226 Difference]: Without dead ends: 21 [2018-09-23 19:50:03,501 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-23 19:50:03,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-23 19:50:03,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-23 19:50:03,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-23 19:50:03,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-23 19:50:03,505 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-09-23 19:50:03,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:03,506 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-23 19:50:03,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-23 19:50:03,506 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-23 19:50:03,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-23 19:50:03,506 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:03,507 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1, 1] [2018-09-23 19:50:03,507 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:03,507 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:03,507 INFO L82 PathProgramCache]: Analyzing trace with hash -702152314, now seen corresponding path program 17 times [2018-09-23 19:50:03,507 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:03,507 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:03,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:03,508 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:03,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:03,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:03,944 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:03,944 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:03,944 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:03,952 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:50:03,983 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-23 19:50:03,983 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:03,985 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:03,994 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:04,023 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:04,024 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-23 19:50:04,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-23 19:50:04,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-23 19:50:04,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-23 19:50:04,025 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 20 states. [2018-09-23 19:50:04,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:04,155 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-09-23 19:50:04,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-23 19:50:04,155 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2018-09-23 19:50:04,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:04,156 INFO L225 Difference]: With dead ends: 24 [2018-09-23 19:50:04,156 INFO L226 Difference]: Without dead ends: 22 [2018-09-23 19:50:04,156 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-23 19:50:04,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-23 19:50:04,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-23 19:50:04,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-23 19:50:04,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-09-23 19:50:04,163 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-09-23 19:50:04,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:04,164 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-09-23 19:50:04,164 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-23 19:50:04,164 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-09-23 19:50:04,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-23 19:50:04,168 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:04,168 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1, 1] [2018-09-23 19:50:04,168 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:04,168 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:04,168 INFO L82 PathProgramCache]: Analyzing trace with hash -291889120, now seen corresponding path program 18 times [2018-09-23 19:50:04,168 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:04,169 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:04,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:04,170 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:04,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:04,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:04,467 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:04,467 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:04,467 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:04,477 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:50:04,493 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-23 19:50:04,493 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:04,495 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:04,505 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:04,525 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:04,525 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-23 19:50:04,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-23 19:50:04,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-23 19:50:04,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-23 19:50:04,527 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 21 states. [2018-09-23 19:50:04,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:04,559 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-23 19:50:04,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-23 19:50:04,560 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 21 [2018-09-23 19:50:04,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:04,561 INFO L225 Difference]: With dead ends: 25 [2018-09-23 19:50:04,561 INFO L226 Difference]: Without dead ends: 23 [2018-09-23 19:50:04,562 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-23 19:50:04,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-23 19:50:04,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-23 19:50:04,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-23 19:50:04,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-23 19:50:04,565 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-09-23 19:50:04,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:04,565 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-23 19:50:04,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-23 19:50:04,566 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-23 19:50:04,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-23 19:50:04,566 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:04,566 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1, 1] [2018-09-23 19:50:04,567 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:04,567 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:04,567 INFO L82 PathProgramCache]: Analyzing trace with hash -458631994, now seen corresponding path program 19 times [2018-09-23 19:50:04,567 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:04,567 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:04,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:04,568 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:04,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:04,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:04,832 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:04,833 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:04,833 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:04,841 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:04,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:04,860 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:04,870 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:04,894 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:04,895 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-23 19:50:04,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-23 19:50:04,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-23 19:50:04,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-23 19:50:04,896 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 22 states. [2018-09-23 19:50:04,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:04,942 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-09-23 19:50:04,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-23 19:50:04,943 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2018-09-23 19:50:04,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:04,944 INFO L225 Difference]: With dead ends: 26 [2018-09-23 19:50:04,944 INFO L226 Difference]: Without dead ends: 24 [2018-09-23 19:50:04,944 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-23 19:50:04,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-23 19:50:04,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-23 19:50:04,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-23 19:50:04,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-09-23 19:50:04,947 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-09-23 19:50:04,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:04,947 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-09-23 19:50:04,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-23 19:50:04,947 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-09-23 19:50:04,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-23 19:50:04,948 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:04,948 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1, 1] [2018-09-23 19:50:04,948 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:04,949 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:04,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1332693792, now seen corresponding path program 20 times [2018-09-23 19:50:04,949 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:04,949 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:04,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:04,950 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:04,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:04,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:05,250 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:05,251 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:05,251 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:05,259 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:50:05,274 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:50:05,274 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:05,276 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:05,286 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:05,315 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:05,315 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-23 19:50:05,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-23 19:50:05,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-23 19:50:05,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-23 19:50:05,317 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 23 states. [2018-09-23 19:50:05,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:05,491 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-23 19:50:05,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-23 19:50:05,491 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 23 [2018-09-23 19:50:05,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:05,492 INFO L225 Difference]: With dead ends: 27 [2018-09-23 19:50:05,492 INFO L226 Difference]: Without dead ends: 25 [2018-09-23 19:50:05,493 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-23 19:50:05,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-23 19:50:05,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-23 19:50:05,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-23 19:50:05,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-23 19:50:05,496 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-09-23 19:50:05,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:05,496 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-23 19:50:05,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-23 19:50:05,496 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-23 19:50:05,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-23 19:50:05,497 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:05,497 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1, 1] [2018-09-23 19:50:05,497 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:05,498 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:05,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1636161542, now seen corresponding path program 21 times [2018-09-23 19:50:05,498 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:05,498 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:05,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:05,499 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:05,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:05,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:05,830 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:05,831 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:05,831 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:05,839 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:50:05,860 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-23 19:50:05,860 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:05,863 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:05,872 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:05,896 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:05,897 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-23 19:50:05,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-23 19:50:05,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-23 19:50:05,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-23 19:50:05,898 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 24 states. [2018-09-23 19:50:05,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:05,953 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-09-23 19:50:05,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-23 19:50:05,956 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 24 [2018-09-23 19:50:05,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:05,957 INFO L225 Difference]: With dead ends: 28 [2018-09-23 19:50:05,957 INFO L226 Difference]: Without dead ends: 26 [2018-09-23 19:50:05,957 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-23 19:50:05,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-23 19:50:05,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-23 19:50:05,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-23 19:50:05,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-09-23 19:50:05,960 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-09-23 19:50:05,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:05,960 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-09-23 19:50:05,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-23 19:50:05,961 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-09-23 19:50:05,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-23 19:50:05,961 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:05,961 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1, 1] [2018-09-23 19:50:05,961 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:05,962 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:05,962 INFO L82 PathProgramCache]: Analyzing trace with hash -818603616, now seen corresponding path program 22 times [2018-09-23 19:50:05,962 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:05,962 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:05,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:05,963 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:05,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:05,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:06,825 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:06,826 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:06,826 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:06,836 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:50:06,868 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:50:06,868 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:06,871 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:06,880 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:06,909 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:06,909 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-23 19:50:06,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-23 19:50:06,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-23 19:50:06,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-23 19:50:06,911 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 25 states. [2018-09-23 19:50:07,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:07,000 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-23 19:50:07,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-23 19:50:07,001 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 25 [2018-09-23 19:50:07,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:07,001 INFO L225 Difference]: With dead ends: 29 [2018-09-23 19:50:07,002 INFO L226 Difference]: Without dead ends: 27 [2018-09-23 19:50:07,002 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-23 19:50:07,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-23 19:50:07,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-23 19:50:07,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-23 19:50:07,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-23 19:50:07,006 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-09-23 19:50:07,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:07,006 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-23 19:50:07,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-23 19:50:07,006 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-23 19:50:07,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-23 19:50:07,007 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:07,007 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1, 1] [2018-09-23 19:50:07,008 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:07,008 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:07,008 INFO L82 PathProgramCache]: Analyzing trace with hash 393087814, now seen corresponding path program 23 times [2018-09-23 19:50:07,008 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:07,008 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:07,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:07,009 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:07,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:07,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:07,582 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:07,582 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:07,582 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:07,590 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:50:07,611 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-23 19:50:07,611 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:07,613 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:07,624 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:07,652 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:07,653 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-23 19:50:07,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-23 19:50:07,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-23 19:50:07,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-23 19:50:07,654 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 26 states. [2018-09-23 19:50:07,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:07,745 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-09-23 19:50:07,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-23 19:50:07,746 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 26 [2018-09-23 19:50:07,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:07,746 INFO L225 Difference]: With dead ends: 30 [2018-09-23 19:50:07,746 INFO L226 Difference]: Without dead ends: 28 [2018-09-23 19:50:07,747 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-23 19:50:07,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-23 19:50:07,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-23 19:50:07,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-23 19:50:07,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-09-23 19:50:07,751 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-09-23 19:50:07,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:07,752 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-09-23 19:50:07,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-23 19:50:07,752 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-09-23 19:50:07,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-23 19:50:07,753 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:07,753 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1, 1] [2018-09-23 19:50:07,753 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:07,753 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:07,754 INFO L82 PathProgramCache]: Analyzing trace with hash -699183520, now seen corresponding path program 24 times [2018-09-23 19:50:07,754 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:07,754 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:07,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:07,755 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:07,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:07,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:08,499 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:08,499 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:08,499 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:08,507 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:50:08,529 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-23 19:50:08,529 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:08,532 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:08,544 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:08,567 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:08,567 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-23 19:50:08,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-23 19:50:08,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-23 19:50:08,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-23 19:50:08,568 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 27 states. [2018-09-23 19:50:08,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:08,613 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-23 19:50:08,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-23 19:50:08,613 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 27 [2018-09-23 19:50:08,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:08,614 INFO L225 Difference]: With dead ends: 31 [2018-09-23 19:50:08,614 INFO L226 Difference]: Without dead ends: 29 [2018-09-23 19:50:08,615 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-23 19:50:08,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-23 19:50:08,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-23 19:50:08,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-23 19:50:08,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-23 19:50:08,619 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-09-23 19:50:08,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:08,619 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-23 19:50:08,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-23 19:50:08,619 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-23 19:50:08,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-23 19:50:08,620 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:08,620 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1, 1] [2018-09-23 19:50:08,620 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:08,620 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:08,621 INFO L82 PathProgramCache]: Analyzing trace with hash -199856506, now seen corresponding path program 25 times [2018-09-23 19:50:08,621 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:08,621 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:08,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:08,622 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:08,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:08,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:09,208 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:09,209 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:09,209 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:09,217 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:09,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:09,233 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:09,243 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:09,263 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:09,263 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-23 19:50:09,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-23 19:50:09,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-23 19:50:09,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-23 19:50:09,264 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 28 states. [2018-09-23 19:50:09,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:09,308 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-09-23 19:50:09,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-23 19:50:09,309 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 28 [2018-09-23 19:50:09,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:09,309 INFO L225 Difference]: With dead ends: 32 [2018-09-23 19:50:09,309 INFO L226 Difference]: Without dead ends: 30 [2018-09-23 19:50:09,310 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-23 19:50:09,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-23 19:50:09,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-23 19:50:09,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:50:09,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-09-23 19:50:09,314 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-09-23 19:50:09,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:09,314 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-09-23 19:50:09,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-23 19:50:09,314 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-09-23 19:50:09,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-23 19:50:09,315 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:09,315 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1, 1] [2018-09-23 19:50:09,315 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:09,315 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:09,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1900588256, now seen corresponding path program 26 times [2018-09-23 19:50:09,316 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:09,316 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:09,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:09,316 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:09,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:09,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:10,669 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:10,670 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:10,670 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:10,680 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:50:10,697 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:50:10,698 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:10,701 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:10,713 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:10,741 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:10,741 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-23 19:50:10,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-23 19:50:10,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-23 19:50:10,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-23 19:50:10,742 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 29 states. [2018-09-23 19:50:10,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:10,929 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-23 19:50:10,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-23 19:50:10,929 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 29 [2018-09-23 19:50:10,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:10,930 INFO L225 Difference]: With dead ends: 33 [2018-09-23 19:50:10,930 INFO L226 Difference]: Without dead ends: 31 [2018-09-23 19:50:10,931 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-23 19:50:10,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-23 19:50:10,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-23 19:50:10,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-23 19:50:10,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-23 19:50:10,935 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-09-23 19:50:10,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:10,936 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-23 19:50:10,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-23 19:50:10,936 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-23 19:50:10,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-23 19:50:10,936 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:10,937 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1, 1] [2018-09-23 19:50:10,937 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:10,937 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:10,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1211302342, now seen corresponding path program 27 times [2018-09-23 19:50:10,937 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:10,937 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:10,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:10,938 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:10,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:10,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:11,967 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:11,968 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:11,968 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:11,977 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:50:12,000 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-23 19:50:12,000 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:12,002 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:12,012 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:12,041 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:12,041 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-23 19:50:12,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-23 19:50:12,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-23 19:50:12,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-23 19:50:12,042 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 30 states. [2018-09-23 19:50:12,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:12,082 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-09-23 19:50:12,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-23 19:50:12,082 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 30 [2018-09-23 19:50:12,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:12,083 INFO L225 Difference]: With dead ends: 34 [2018-09-23 19:50:12,083 INFO L226 Difference]: Without dead ends: 32 [2018-09-23 19:50:12,084 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-23 19:50:12,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-23 19:50:12,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-23 19:50:12,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:50:12,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-09-23 19:50:12,088 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-09-23 19:50:12,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:12,089 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-09-23 19:50:12,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-23 19:50:12,090 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-09-23 19:50:12,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-23 19:50:12,090 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:12,090 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1, 1] [2018-09-23 19:50:12,090 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:12,091 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:12,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1104336928, now seen corresponding path program 28 times [2018-09-23 19:50:12,091 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:12,091 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:12,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:12,092 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:12,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:12,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:12,495 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:12,496 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:12,496 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:12,505 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:50:12,522 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:50:12,522 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:12,524 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:12,533 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:12,555 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:12,555 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-23 19:50:12,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-23 19:50:12,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-23 19:50:12,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-23 19:50:12,556 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 31 states. [2018-09-23 19:50:12,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:12,625 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-23 19:50:12,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-23 19:50:12,626 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 31 [2018-09-23 19:50:12,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:12,627 INFO L225 Difference]: With dead ends: 35 [2018-09-23 19:50:12,627 INFO L226 Difference]: Without dead ends: 33 [2018-09-23 19:50:12,628 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-23 19:50:12,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-23 19:50:12,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-23 19:50:12,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-23 19:50:12,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-23 19:50:12,631 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-09-23 19:50:12,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:12,632 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-23 19:50:12,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-23 19:50:12,632 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-23 19:50:12,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-23 19:50:12,633 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:12,633 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1, 1] [2018-09-23 19:50:12,633 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:12,633 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:12,633 INFO L82 PathProgramCache]: Analyzing trace with hash 125289734, now seen corresponding path program 29 times [2018-09-23 19:50:12,634 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:12,634 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:12,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:12,635 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:12,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:12,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:13,080 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:13,081 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:13,081 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:13,089 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:50:13,115 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-23 19:50:13,115 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:13,119 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:13,132 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:13,153 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:13,153 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-23 19:50:13,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-23 19:50:13,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-23 19:50:13,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-23 19:50:13,154 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 32 states. [2018-09-23 19:50:13,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:13,348 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-09-23 19:50:13,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-23 19:50:13,348 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 32 [2018-09-23 19:50:13,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:13,349 INFO L225 Difference]: With dead ends: 36 [2018-09-23 19:50:13,349 INFO L226 Difference]: Without dead ends: 34 [2018-09-23 19:50:13,350 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-23 19:50:13,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-23 19:50:13,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-23 19:50:13,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:50:13,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-09-23 19:50:13,354 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-09-23 19:50:13,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:13,354 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-09-23 19:50:13,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-23 19:50:13,354 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-09-23 19:50:13,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-23 19:50:13,354 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:13,354 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1, 1] [2018-09-23 19:50:13,355 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:13,355 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:13,355 INFO L82 PathProgramCache]: Analyzing trace with hash -410989408, now seen corresponding path program 30 times [2018-09-23 19:50:13,355 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:13,355 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:13,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:13,356 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:13,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:13,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:14,054 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:14,054 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:14,054 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:14,067 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:50:14,091 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-23 19:50:14,091 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:14,093 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:14,103 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:14,133 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:14,133 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-23 19:50:14,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-23 19:50:14,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-23 19:50:14,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 19:50:14,134 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 33 states. [2018-09-23 19:50:14,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:14,194 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-23 19:50:14,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-23 19:50:14,195 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 33 [2018-09-23 19:50:14,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:14,195 INFO L225 Difference]: With dead ends: 37 [2018-09-23 19:50:14,195 INFO L226 Difference]: Without dead ends: 35 [2018-09-23 19:50:14,196 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 19:50:14,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-23 19:50:14,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-23 19:50:14,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-23 19:50:14,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-23 19:50:14,199 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-09-23 19:50:14,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:14,200 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-23 19:50:14,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-23 19:50:14,200 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-23 19:50:14,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-23 19:50:14,200 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:14,201 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1, 1] [2018-09-23 19:50:14,201 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:14,201 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:14,201 INFO L82 PathProgramCache]: Analyzing trace with hash 144226374, now seen corresponding path program 31 times [2018-09-23 19:50:14,201 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:14,201 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:14,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:14,202 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:14,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:14,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:14,781 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:14,781 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:14,781 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:14,789 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:14,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:14,811 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:14,821 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:14,843 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:14,843 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-23 19:50:14,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-23 19:50:14,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-23 19:50:14,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 19:50:14,844 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 34 states. [2018-09-23 19:50:14,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:14,916 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-09-23 19:50:14,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-23 19:50:14,917 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 34 [2018-09-23 19:50:14,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:14,917 INFO L225 Difference]: With dead ends: 38 [2018-09-23 19:50:14,917 INFO L226 Difference]: Without dead ends: 36 [2018-09-23 19:50:14,918 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 19:50:14,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-23 19:50:14,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-23 19:50:14,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-23 19:50:14,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-09-23 19:50:14,923 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-09-23 19:50:14,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:14,923 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-09-23 19:50:14,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-23 19:50:14,924 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-09-23 19:50:14,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-23 19:50:14,924 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:14,924 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1, 1] [2018-09-23 19:50:14,924 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:14,925 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:14,925 INFO L82 PathProgramCache]: Analyzing trace with hash 176046432, now seen corresponding path program 32 times [2018-09-23 19:50:14,925 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:14,925 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:14,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:14,926 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:14,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:14,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:15,430 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:15,431 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:15,431 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:15,438 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:50:15,456 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:50:15,456 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:15,458 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:15,467 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:15,493 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:15,493 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-23 19:50:15,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-23 19:50:15,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-23 19:50:15,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 19:50:15,494 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 35 states. [2018-09-23 19:50:15,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:15,565 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-23 19:50:15,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-23 19:50:15,566 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 35 [2018-09-23 19:50:15,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:15,566 INFO L225 Difference]: With dead ends: 39 [2018-09-23 19:50:15,567 INFO L226 Difference]: Without dead ends: 37 [2018-09-23 19:50:15,568 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 19:50:15,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-23 19:50:15,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-23 19:50:15,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-23 19:50:15,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-23 19:50:15,570 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-09-23 19:50:15,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:15,571 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-23 19:50:15,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-23 19:50:15,571 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-23 19:50:15,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-23 19:50:15,571 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:15,571 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1, 1] [2018-09-23 19:50:15,572 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:15,572 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:15,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1162468230, now seen corresponding path program 33 times [2018-09-23 19:50:15,572 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:15,572 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:15,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:15,573 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:15,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:15,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:16,066 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:16,066 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:16,066 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:16,073 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:50:16,101 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-23 19:50:16,102 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:16,103 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:16,112 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:16,141 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:16,141 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-23 19:50:16,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-23 19:50:16,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-23 19:50:16,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 19:50:16,142 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 36 states. [2018-09-23 19:50:16,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:16,203 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-09-23 19:50:16,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-23 19:50:16,204 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 36 [2018-09-23 19:50:16,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:16,204 INFO L225 Difference]: With dead ends: 40 [2018-09-23 19:50:16,204 INFO L226 Difference]: Without dead ends: 38 [2018-09-23 19:50:16,205 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 19:50:16,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-23 19:50:16,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-23 19:50:16,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-23 19:50:16,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-09-23 19:50:16,208 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-09-23 19:50:16,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:16,208 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-09-23 19:50:16,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-23 19:50:16,208 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-09-23 19:50:16,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-23 19:50:16,209 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:16,209 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1, 1] [2018-09-23 19:50:16,209 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:16,209 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:16,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1676772896, now seen corresponding path program 34 times [2018-09-23 19:50:16,209 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:16,209 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:16,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:16,210 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:16,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:16,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:17,084 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:17,085 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:17,085 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:17,093 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:50:17,114 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:50:17,114 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:17,115 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:17,124 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:17,155 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:17,155 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-23 19:50:17,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-23 19:50:17,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-23 19:50:17,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 19:50:17,157 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 37 states. [2018-09-23 19:50:17,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:17,294 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-23 19:50:17,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-23 19:50:17,294 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 37 [2018-09-23 19:50:17,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:17,295 INFO L225 Difference]: With dead ends: 41 [2018-09-23 19:50:17,295 INFO L226 Difference]: Without dead ends: 39 [2018-09-23 19:50:17,296 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 19:50:17,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-23 19:50:17,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-23 19:50:17,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-23 19:50:17,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-23 19:50:17,299 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-09-23 19:50:17,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:17,300 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-23 19:50:17,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-23 19:50:17,300 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-23 19:50:17,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-23 19:50:17,300 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:17,301 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1, 1] [2018-09-23 19:50:17,301 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:17,301 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:17,301 INFO L82 PathProgramCache]: Analyzing trace with hash 440348358, now seen corresponding path program 35 times [2018-09-23 19:50:17,301 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:17,301 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:17,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:17,302 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:17,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:17,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:17,961 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:17,962 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:17,962 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:17,970 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:50:18,001 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-23 19:50:18,001 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:18,004 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:18,015 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:18,035 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:18,035 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-23 19:50:18,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-23 19:50:18,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-23 19:50:18,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 19:50:18,037 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 38 states. [2018-09-23 19:50:18,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:18,133 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-09-23 19:50:18,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-23 19:50:18,134 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 38 [2018-09-23 19:50:18,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:18,134 INFO L225 Difference]: With dead ends: 42 [2018-09-23 19:50:18,135 INFO L226 Difference]: Without dead ends: 40 [2018-09-23 19:50:18,135 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 19:50:18,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-23 19:50:18,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-23 19:50:18,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-23 19:50:18,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-09-23 19:50:18,138 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-09-23 19:50:18,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:18,138 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-09-23 19:50:18,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-23 19:50:18,138 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-09-23 19:50:18,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-23 19:50:18,138 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:18,139 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1, 1] [2018-09-23 19:50:18,139 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:18,139 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:18,139 INFO L82 PathProgramCache]: Analyzing trace with hash 765893344, now seen corresponding path program 36 times [2018-09-23 19:50:18,139 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:18,139 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:18,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:18,140 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:18,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:18,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:18,705 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:18,705 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:18,705 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:18,713 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:50:18,741 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-23 19:50:18,742 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:18,744 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:18,754 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:18,784 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:18,785 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-23 19:50:18,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-23 19:50:18,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-23 19:50:18,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 19:50:18,786 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 39 states. [2018-09-23 19:50:19,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:19,276 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-23 19:50:19,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-23 19:50:19,277 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 39 [2018-09-23 19:50:19,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:19,277 INFO L225 Difference]: With dead ends: 43 [2018-09-23 19:50:19,277 INFO L226 Difference]: Without dead ends: 41 [2018-09-23 19:50:19,279 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 19:50:19,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-23 19:50:19,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-23 19:50:19,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-23 19:50:19,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-23 19:50:19,281 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-09-23 19:50:19,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:19,281 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-23 19:50:19,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-23 19:50:19,281 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-23 19:50:19,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-23 19:50:19,282 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:19,282 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1, 1] [2018-09-23 19:50:19,282 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:19,282 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:19,282 INFO L82 PathProgramCache]: Analyzing trace with hash -2027113978, now seen corresponding path program 37 times [2018-09-23 19:50:19,282 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:19,283 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:19,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:19,283 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:19,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:19,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:19,920 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:19,920 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:19,921 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:19,928 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:19,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:19,952 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:19,962 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:19,987 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:19,987 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-23 19:50:19,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-23 19:50:19,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-23 19:50:19,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 19:50:19,988 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 40 states. [2018-09-23 19:50:20,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:20,080 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-09-23 19:50:20,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-23 19:50:20,081 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 40 [2018-09-23 19:50:20,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:20,082 INFO L225 Difference]: With dead ends: 44 [2018-09-23 19:50:20,082 INFO L226 Difference]: Without dead ends: 42 [2018-09-23 19:50:20,083 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 19:50:20,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-23 19:50:20,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-23 19:50:20,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-23 19:50:20,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-09-23 19:50:20,085 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-09-23 19:50:20,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:20,085 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-09-23 19:50:20,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-23 19:50:20,085 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-09-23 19:50:20,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-23 19:50:20,086 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:20,086 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1, 1] [2018-09-23 19:50:20,086 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:20,086 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:20,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1583972256, now seen corresponding path program 38 times [2018-09-23 19:50:20,086 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:20,087 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:20,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:20,087 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:20,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:20,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:20,759 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:20,760 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:20,760 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:20,768 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:50:20,790 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:50:20,791 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:20,792 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:20,803 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:20,828 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:20,828 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-23 19:50:20,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-23 19:50:20,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-23 19:50:20,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 19:50:20,829 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 41 states. [2018-09-23 19:50:20,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:20,906 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-23 19:50:20,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-23 19:50:20,906 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 41 [2018-09-23 19:50:20,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:20,907 INFO L225 Difference]: With dead ends: 45 [2018-09-23 19:50:20,907 INFO L226 Difference]: Without dead ends: 43 [2018-09-23 19:50:20,908 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 19:50:20,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-23 19:50:20,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-23 19:50:20,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-23 19:50:20,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-23 19:50:20,911 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-09-23 19:50:20,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:20,911 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-23 19:50:20,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-23 19:50:20,911 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-23 19:50:20,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-23 19:50:20,912 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:20,912 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1, 1] [2018-09-23 19:50:20,912 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:20,912 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:20,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1858495814, now seen corresponding path program 39 times [2018-09-23 19:50:20,912 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:20,912 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:20,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:20,913 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:20,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:20,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:21,642 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:21,643 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:21,643 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:21,650 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:50:21,679 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-23 19:50:21,680 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:21,681 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:21,694 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:21,715 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:21,715 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-23 19:50:21,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-23 19:50:21,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-23 19:50:21,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 19:50:21,716 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 42 states. [2018-09-23 19:50:21,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:21,818 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-09-23 19:50:21,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-23 19:50:21,818 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 42 [2018-09-23 19:50:21,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:21,819 INFO L225 Difference]: With dead ends: 46 [2018-09-23 19:50:21,819 INFO L226 Difference]: Without dead ends: 44 [2018-09-23 19:50:21,820 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 19:50:21,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-23 19:50:21,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-23 19:50:21,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-23 19:50:21,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-09-23 19:50:21,821 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-09-23 19:50:21,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:21,821 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-09-23 19:50:21,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-23 19:50:21,822 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-09-23 19:50:21,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-23 19:50:21,822 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:21,822 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1, 1] [2018-09-23 19:50:21,822 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:21,822 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:21,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1778791520, now seen corresponding path program 40 times [2018-09-23 19:50:21,822 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:21,822 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:21,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:21,823 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:21,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:21,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:23,386 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:23,386 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:23,386 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:23,394 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:50:23,419 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:50:23,420 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:23,421 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:23,431 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:23,456 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:23,456 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-23 19:50:23,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-23 19:50:23,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-23 19:50:23,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 19:50:23,458 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 43 states. [2018-09-23 19:50:23,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:23,562 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-23 19:50:23,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-23 19:50:23,563 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 43 [2018-09-23 19:50:23,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:23,564 INFO L225 Difference]: With dead ends: 47 [2018-09-23 19:50:23,564 INFO L226 Difference]: Without dead ends: 45 [2018-09-23 19:50:23,565 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 19:50:23,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-23 19:50:23,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-23 19:50:23,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-23 19:50:23,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-23 19:50:23,567 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-09-23 19:50:23,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:23,567 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-23 19:50:23,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-23 19:50:23,568 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-23 19:50:23,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-23 19:50:23,568 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:23,568 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1, 1] [2018-09-23 19:50:23,568 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:23,569 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:23,569 INFO L82 PathProgramCache]: Analyzing trace with hash -692041594, now seen corresponding path program 41 times [2018-09-23 19:50:23,569 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:23,569 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:23,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:23,570 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:23,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:23,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:24,613 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:24,613 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:24,614 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:24,622 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:50:24,659 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-23 19:50:24,659 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:24,661 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:24,673 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:24,693 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:24,693 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-23 19:50:24,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-23 19:50:24,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-23 19:50:24,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 19:50:24,694 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 44 states. [2018-09-23 19:50:24,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:24,755 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-09-23 19:50:24,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-23 19:50:24,756 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 44 [2018-09-23 19:50:24,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:24,756 INFO L225 Difference]: With dead ends: 48 [2018-09-23 19:50:24,757 INFO L226 Difference]: Without dead ends: 46 [2018-09-23 19:50:24,758 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 19:50:24,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-23 19:50:24,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-23 19:50:24,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-23 19:50:24,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-09-23 19:50:24,759 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-09-23 19:50:24,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:24,759 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-09-23 19:50:24,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-23 19:50:24,759 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-09-23 19:50:24,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-23 19:50:24,760 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:24,760 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1, 1] [2018-09-23 19:50:24,760 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:24,760 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:24,760 INFO L82 PathProgramCache]: Analyzing trace with hash 21543200, now seen corresponding path program 42 times [2018-09-23 19:50:24,760 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:24,761 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:24,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:24,761 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:24,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:24,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:25,666 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:25,666 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:25,666 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:25,674 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:50:25,706 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-09-23 19:50:25,707 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:25,709 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:25,718 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:25,743 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:25,743 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-23 19:50:25,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-23 19:50:25,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-23 19:50:25,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 19:50:25,744 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 45 states. [2018-09-23 19:50:25,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:25,815 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-23 19:50:25,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-23 19:50:25,815 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 45 [2018-09-23 19:50:25,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:25,816 INFO L225 Difference]: With dead ends: 49 [2018-09-23 19:50:25,816 INFO L226 Difference]: Without dead ends: 47 [2018-09-23 19:50:25,818 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 19:50:25,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-23 19:50:25,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-23 19:50:25,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-23 19:50:25,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-23 19:50:25,820 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-09-23 19:50:25,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:25,820 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-23 19:50:25,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-23 19:50:25,820 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-23 19:50:25,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-23 19:50:25,821 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:25,821 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1, 1] [2018-09-23 19:50:25,821 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:25,821 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:25,821 INFO L82 PathProgramCache]: Analyzing trace with hash 667835334, now seen corresponding path program 43 times [2018-09-23 19:50:25,821 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:25,821 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:25,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:25,822 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:25,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:25,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:26,619 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:26,620 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:26,620 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:26,627 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:26,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:26,653 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:26,664 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:26,683 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:26,684 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-23 19:50:26,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-23 19:50:26,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-23 19:50:26,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 19:50:26,685 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 46 states. [2018-09-23 19:50:26,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:26,850 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-09-23 19:50:26,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-23 19:50:26,850 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 46 [2018-09-23 19:50:26,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:26,851 INFO L225 Difference]: With dead ends: 50 [2018-09-23 19:50:26,851 INFO L226 Difference]: Without dead ends: 48 [2018-09-23 19:50:26,852 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 19:50:26,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-23 19:50:26,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-09-23 19:50:26,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-23 19:50:26,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-09-23 19:50:26,854 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-09-23 19:50:26,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:26,854 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-09-23 19:50:26,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-23 19:50:26,855 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-09-23 19:50:26,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-23 19:50:26,855 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:26,855 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1, 1] [2018-09-23 19:50:26,855 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:26,855 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:26,856 INFO L82 PathProgramCache]: Analyzing trace with hash -771944992, now seen corresponding path program 44 times [2018-09-23 19:50:26,856 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:26,856 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:26,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:26,857 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:26,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:26,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:28,036 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:28,037 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:28,037 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 [2018-09-23 19:50:28,047 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:50:28,078 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:50:28,078 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:28,080 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:28,089 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:28,109 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:28,109 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-23 19:50:28,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-23 19:50:28,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-23 19:50:28,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 19:50:28,110 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 47 states. [2018-09-23 19:50:28,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:28,165 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-23 19:50:28,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-23 19:50:28,166 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 47 [2018-09-23 19:50:28,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:28,166 INFO L225 Difference]: With dead ends: 51 [2018-09-23 19:50:28,167 INFO L226 Difference]: Without dead ends: 49 [2018-09-23 19:50:28,167 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 19:50:28,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-23 19:50:28,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-23 19:50:28,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-23 19:50:28,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-23 19:50:28,170 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-09-23 19:50:28,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:28,170 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-23 19:50:28,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-23 19:50:28,171 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-23 19:50:28,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-23 19:50:28,171 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:28,171 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1, 1] [2018-09-23 19:50:28,171 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:28,172 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:28,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1839505158, now seen corresponding path program 45 times [2018-09-23 19:50:28,172 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:28,172 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:28,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:28,173 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:28,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:28,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:29,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:29,087 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:29,087 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:29,096 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:50:29,130 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-23 19:50:29,130 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:29,132 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:29,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:29,169 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:29,169 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-23 19:50:29,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-23 19:50:29,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-23 19:50:29,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 19:50:29,170 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 48 states. [2018-09-23 19:50:29,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:29,556 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-09-23 19:50:29,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-23 19:50:29,556 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 48 [2018-09-23 19:50:29,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:29,557 INFO L225 Difference]: With dead ends: 52 [2018-09-23 19:50:29,557 INFO L226 Difference]: Without dead ends: 50 [2018-09-23 19:50:29,558 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 19:50:29,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-23 19:50:29,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-23 19:50:29,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-23 19:50:29,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-09-23 19:50:29,560 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-09-23 19:50:29,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:29,560 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-09-23 19:50:29,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-23 19:50:29,561 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-09-23 19:50:29,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-23 19:50:29,561 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:29,561 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1, 1] [2018-09-23 19:50:29,561 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:29,562 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:29,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1190081184, now seen corresponding path program 46 times [2018-09-23 19:50:29,562 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:29,562 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:29,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:29,563 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:29,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:29,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:30,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:30,611 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:30,611 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 [2018-09-23 19:50:30,619 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:50:30,648 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:50:30,649 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:30,650 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:30,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:30,688 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:30,688 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-23 19:50:30,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-23 19:50:30,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-23 19:50:30,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-23 19:50:30,689 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 49 states. [2018-09-23 19:50:30,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:30,759 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-23 19:50:30,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-23 19:50:30,759 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 49 [2018-09-23 19:50:30,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:30,760 INFO L225 Difference]: With dead ends: 53 [2018-09-23 19:50:30,760 INFO L226 Difference]: Without dead ends: 51 [2018-09-23 19:50:30,761 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-23 19:50:30,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-23 19:50:30,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-23 19:50:30,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-23 19:50:30,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-23 19:50:30,763 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-09-23 19:50:30,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:30,763 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-23 19:50:30,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-23 19:50:30,763 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-23 19:50:30,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-23 19:50:30,764 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:30,764 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1, 1] [2018-09-23 19:50:30,764 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:30,764 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:30,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1762192826, now seen corresponding path program 47 times [2018-09-23 19:50:30,764 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:30,764 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:30,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:30,765 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:30,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:30,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:31,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:31,788 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:31,788 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:31,795 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:50:31,834 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-23 19:50:31,834 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:31,836 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:31,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:31,867 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:31,867 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-23 19:50:31,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-23 19:50:31,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-23 19:50:31,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 19:50:31,868 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 50 states. [2018-09-23 19:50:31,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:31,949 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-09-23 19:50:31,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-23 19:50:31,956 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 50 [2018-09-23 19:50:31,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:31,956 INFO L225 Difference]: With dead ends: 54 [2018-09-23 19:50:31,956 INFO L226 Difference]: Without dead ends: 52 [2018-09-23 19:50:31,957 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 19:50:31,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-23 19:50:31,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-23 19:50:31,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-23 19:50:31,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-09-23 19:50:31,959 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-09-23 19:50:31,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:31,959 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-09-23 19:50:31,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-23 19:50:31,959 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-09-23 19:50:31,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-23 19:50:31,960 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:31,960 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1, 1] [2018-09-23 19:50:31,960 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:31,960 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:31,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1206593376, now seen corresponding path program 48 times [2018-09-23 19:50:31,961 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:31,961 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:31,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:31,962 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:31,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:31,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:33,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:33,188 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:33,188 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 [2018-09-23 19:50:33,196 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:50:33,233 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-23 19:50:33,233 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:33,236 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:33,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:33,266 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:33,266 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-23 19:50:33,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-23 19:50:33,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-23 19:50:33,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-23 19:50:33,267 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 51 states. [2018-09-23 19:50:33,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:33,342 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-23 19:50:33,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-23 19:50:33,343 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 51 [2018-09-23 19:50:33,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:33,344 INFO L225 Difference]: With dead ends: 55 [2018-09-23 19:50:33,344 INFO L226 Difference]: Without dead ends: 53 [2018-09-23 19:50:33,345 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-23 19:50:33,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-23 19:50:33,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-23 19:50:33,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-23 19:50:33,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-23 19:50:33,348 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-09-23 19:50:33,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:33,348 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-23 19:50:33,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-23 19:50:33,349 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-23 19:50:33,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-23 19:50:33,349 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:33,349 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1, 1] [2018-09-23 19:50:33,349 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:33,350 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:33,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1250314874, now seen corresponding path program 49 times [2018-09-23 19:50:33,350 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:33,350 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:33,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:33,351 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:33,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:33,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:34,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:34,346 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:34,346 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:34,354 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:34,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:34,383 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:34,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:34,418 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:34,418 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-23 19:50:34,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-23 19:50:34,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-23 19:50:34,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 19:50:34,419 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 52 states. [2018-09-23 19:50:34,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:34,501 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-09-23 19:50:34,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-23 19:50:34,501 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 52 [2018-09-23 19:50:34,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:34,502 INFO L225 Difference]: With dead ends: 56 [2018-09-23 19:50:34,502 INFO L226 Difference]: Without dead ends: 54 [2018-09-23 19:50:34,503 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 19:50:34,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-23 19:50:34,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-09-23 19:50:34,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-23 19:50:34,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-09-23 19:50:34,506 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-09-23 19:50:34,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:34,506 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-09-23 19:50:34,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-23 19:50:34,506 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-09-23 19:50:34,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-23 19:50:34,506 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:34,507 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1, 1] [2018-09-23 19:50:34,507 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:34,507 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:34,507 INFO L82 PathProgramCache]: Analyzing trace with hash -105059296, now seen corresponding path program 50 times [2018-09-23 19:50:34,507 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:34,507 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:34,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:34,508 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:34,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:34,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:35,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:35,522 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:35,522 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 [2018-09-23 19:50:35,531 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:50:35,570 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:50:35,571 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:35,574 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:35,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:35,609 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:35,609 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-23 19:50:35,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-23 19:50:35,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-23 19:50:35,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 19:50:35,610 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 53 states. [2018-09-23 19:50:35,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:35,713 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-23 19:50:35,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-23 19:50:35,714 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 53 [2018-09-23 19:50:35,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:35,715 INFO L225 Difference]: With dead ends: 57 [2018-09-23 19:50:35,715 INFO L226 Difference]: Without dead ends: 55 [2018-09-23 19:50:35,716 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 19:50:35,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-23 19:50:35,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-23 19:50:35,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-23 19:50:35,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-23 19:50:35,719 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-09-23 19:50:35,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:35,720 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-23 19:50:35,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-23 19:50:35,720 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-23 19:50:35,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-23 19:50:35,720 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:35,720 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1, 1] [2018-09-23 19:50:35,721 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:35,721 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:35,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1038125254, now seen corresponding path program 51 times [2018-09-23 19:50:35,721 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:35,721 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:35,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:35,722 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:35,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:35,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:36,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:36,932 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:36,932 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:36,952 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:50:36,997 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-09-23 19:50:36,997 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:36,999 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:37,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:37,041 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:37,041 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-23 19:50:37,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-23 19:50:37,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-23 19:50:37,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 19:50:37,042 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 54 states. [2018-09-23 19:50:37,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:37,235 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-09-23 19:50:37,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-23 19:50:37,235 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 54 [2018-09-23 19:50:37,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:37,236 INFO L225 Difference]: With dead ends: 58 [2018-09-23 19:50:37,236 INFO L226 Difference]: Without dead ends: 56 [2018-09-23 19:50:37,236 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 19:50:37,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-23 19:50:37,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-23 19:50:37,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-23 19:50:37,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-09-23 19:50:37,238 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-09-23 19:50:37,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:37,238 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-09-23 19:50:37,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-23 19:50:37,239 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-09-23 19:50:37,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-23 19:50:37,239 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:37,239 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1, 1] [2018-09-23 19:50:37,239 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:37,240 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:37,240 INFO L82 PathProgramCache]: Analyzing trace with hash 2117107936, now seen corresponding path program 52 times [2018-09-23 19:50:37,240 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:37,240 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:37,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:37,241 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:37,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:37,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:38,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:38,385 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:38,385 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 [2018-09-23 19:50:38,393 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:50:38,426 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:50:38,426 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:38,429 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:38,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:38,472 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:38,472 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-23 19:50:38,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-23 19:50:38,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-23 19:50:38,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-23 19:50:38,473 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 55 states. [2018-09-23 19:50:38,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:38,567 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-23 19:50:38,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-23 19:50:38,568 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 55 [2018-09-23 19:50:38,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:38,569 INFO L225 Difference]: With dead ends: 59 [2018-09-23 19:50:38,569 INFO L226 Difference]: Without dead ends: 57 [2018-09-23 19:50:38,570 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-23 19:50:38,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-23 19:50:38,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-23 19:50:38,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-23 19:50:38,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-09-23 19:50:38,573 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-09-23 19:50:38,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:38,573 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-09-23 19:50:38,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-23 19:50:38,573 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-09-23 19:50:38,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-23 19:50:38,574 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:38,574 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1, 1] [2018-09-23 19:50:38,574 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:38,574 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:38,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1205832710, now seen corresponding path program 53 times [2018-09-23 19:50:38,575 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:38,575 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:38,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:38,575 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:38,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:38,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:39,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:39,707 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:39,707 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:39,714 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:50:39,758 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-09-23 19:50:39,758 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:39,761 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:39,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:39,791 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:39,791 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-23 19:50:39,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-23 19:50:39,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-23 19:50:39,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 19:50:39,792 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 56 states. [2018-09-23 19:50:39,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:39,883 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-09-23 19:50:39,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-23 19:50:39,884 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 56 [2018-09-23 19:50:39,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:39,885 INFO L225 Difference]: With dead ends: 60 [2018-09-23 19:50:39,885 INFO L226 Difference]: Without dead ends: 58 [2018-09-23 19:50:39,886 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 19:50:39,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-23 19:50:39,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-23 19:50:39,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-23 19:50:39,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-09-23 19:50:39,888 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-09-23 19:50:39,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:39,888 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-09-23 19:50:39,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-23 19:50:39,888 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-09-23 19:50:39,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-23 19:50:39,889 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:39,889 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1, 1] [2018-09-23 19:50:39,889 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:39,889 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:39,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1273895520, now seen corresponding path program 54 times [2018-09-23 19:50:39,889 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:39,889 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:39,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:39,890 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:39,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:39,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:41,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:41,071 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:41,071 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 [2018-09-23 19:50:41,078 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:50:41,122 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-09-23 19:50:41,122 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:41,124 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:41,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:41,169 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:41,169 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-23 19:50:41,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-23 19:50:41,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-23 19:50:41,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-23 19:50:41,171 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 57 states. [2018-09-23 19:50:41,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:41,396 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-23 19:50:41,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-23 19:50:41,397 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 57 [2018-09-23 19:50:41,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:41,398 INFO L225 Difference]: With dead ends: 61 [2018-09-23 19:50:41,398 INFO L226 Difference]: Without dead ends: 59 [2018-09-23 19:50:41,398 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-23 19:50:41,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-23 19:50:41,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-23 19:50:41,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-23 19:50:41,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-23 19:50:41,401 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-09-23 19:50:41,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:41,401 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-23 19:50:41,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-23 19:50:41,401 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-23 19:50:41,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-23 19:50:41,401 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:41,402 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1, 1] [2018-09-23 19:50:41,402 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:41,402 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:41,402 INFO L82 PathProgramCache]: Analyzing trace with hash -836059322, now seen corresponding path program 55 times [2018-09-23 19:50:41,402 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:41,402 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:41,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:41,403 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:41,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:41,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:43,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:43,554 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:43,554 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 [2018-09-23 19:50:43,562 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:43,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:43,601 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:43,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:43,631 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:43,631 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-23 19:50:43,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-23 19:50:43,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-23 19:50:43,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 19:50:43,632 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 58 states. [2018-09-23 19:50:43,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:43,724 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-09-23 19:50:43,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-23 19:50:43,725 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 58 [2018-09-23 19:50:43,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:43,726 INFO L225 Difference]: With dead ends: 62 [2018-09-23 19:50:43,726 INFO L226 Difference]: Without dead ends: 60 [2018-09-23 19:50:43,726 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 19:50:43,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-09-23 19:50:43,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-09-23 19:50:43,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-23 19:50:43,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-09-23 19:50:43,729 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-09-23 19:50:43,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:43,730 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-09-23 19:50:43,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-23 19:50:43,730 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-09-23 19:50:43,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-23 19:50:43,730 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:43,730 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1, 1] [2018-09-23 19:50:43,731 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:43,731 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:43,731 INFO L82 PathProgramCache]: Analyzing trace with hash -148039072, now seen corresponding path program 56 times [2018-09-23 19:50:43,731 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:43,731 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:43,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:43,732 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:43,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:43,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:44,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:44,927 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:44,927 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:44,934 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:50:44,966 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:50:44,966 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:44,968 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:44,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:45,012 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:45,012 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-23 19:50:45,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-23 19:50:45,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-23 19:50:45,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 19:50:45,013 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 59 states. [2018-09-23 19:50:45,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:45,268 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-23 19:50:45,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-23 19:50:45,269 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 59 [2018-09-23 19:50:45,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:45,269 INFO L225 Difference]: With dead ends: 63 [2018-09-23 19:50:45,270 INFO L226 Difference]: Without dead ends: 61 [2018-09-23 19:50:45,270 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 19:50:45,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-23 19:50:45,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-23 19:50:45,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-23 19:50:45,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-09-23 19:50:45,274 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-09-23 19:50:45,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:45,274 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-09-23 19:50:45,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-23 19:50:45,274 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-09-23 19:50:45,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-23 19:50:45,275 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:45,275 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1, 1] [2018-09-23 19:50:45,275 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:45,275 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:45,276 INFO L82 PathProgramCache]: Analyzing trace with hash -294247802, now seen corresponding path program 57 times [2018-09-23 19:50:45,276 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:45,276 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:45,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:45,277 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:45,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:45,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:46,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:46,681 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:46,681 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 [2018-09-23 19:50:46,703 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:50:46,749 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-09-23 19:50:46,749 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:46,752 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:46,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:46,792 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:46,793 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-23 19:50:46,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-23 19:50:46,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-23 19:50:46,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-23 19:50:46,794 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 60 states. [2018-09-23 19:50:46,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:46,904 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-09-23 19:50:46,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-23 19:50:46,904 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 60 [2018-09-23 19:50:46,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:46,905 INFO L225 Difference]: With dead ends: 64 [2018-09-23 19:50:46,905 INFO L226 Difference]: Without dead ends: 62 [2018-09-23 19:50:46,906 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-23 19:50:46,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-09-23 19:50:46,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-09-23 19:50:46,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-23 19:50:46,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-09-23 19:50:46,909 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-09-23 19:50:46,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:46,909 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-09-23 19:50:46,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-23 19:50:46,909 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-09-23 19:50:46,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-09-23 19:50:46,910 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:46,910 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1, 1] [2018-09-23 19:50:46,910 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:46,910 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:46,910 INFO L82 PathProgramCache]: Analyzing trace with hash -531751136, now seen corresponding path program 58 times [2018-09-23 19:50:46,910 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:46,910 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:46,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:46,911 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:46,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:46,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:48,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:48,697 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:48,698 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:48,708 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:50:48,747 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:50:48,747 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:48,749 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:48,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:48,788 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:48,788 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-23 19:50:48,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-23 19:50:48,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-23 19:50:48,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-23 19:50:48,789 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 61 states. [2018-09-23 19:50:48,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:48,871 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-23 19:50:48,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-23 19:50:48,872 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 61 [2018-09-23 19:50:48,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:48,873 INFO L225 Difference]: With dead ends: 65 [2018-09-23 19:50:48,873 INFO L226 Difference]: Without dead ends: 63 [2018-09-23 19:50:48,873 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-23 19:50:48,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-23 19:50:48,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-23 19:50:48,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-23 19:50:48,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-23 19:50:48,876 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-09-23 19:50:48,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:48,876 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-23 19:50:48,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-23 19:50:48,876 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-23 19:50:48,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-23 19:50:48,877 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:48,877 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1, 1] [2018-09-23 19:50:48,877 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:48,877 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:48,877 INFO L82 PathProgramCache]: Analyzing trace with hash 695580102, now seen corresponding path program 59 times [2018-09-23 19:50:48,877 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:48,877 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:48,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:48,878 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:48,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:48,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:50,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:50,766 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:50,766 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:50,774 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:50:50,823 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-09-23 19:50:50,823 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:50,826 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:50,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:50,870 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:50,871 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-23 19:50:50,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-23 19:50:50,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-23 19:50:50,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 19:50:50,872 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 62 states. [2018-09-23 19:50:50,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:50,970 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-09-23 19:50:50,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-23 19:50:50,970 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 62 [2018-09-23 19:50:50,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:50,971 INFO L225 Difference]: With dead ends: 66 [2018-09-23 19:50:50,971 INFO L226 Difference]: Without dead ends: 64 [2018-09-23 19:50:50,972 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 19:50:50,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-23 19:50:50,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-09-23 19:50:50,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-23 19:50:50,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-09-23 19:50:50,974 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-09-23 19:50:50,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:50,975 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-09-23 19:50:50,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-23 19:50:50,975 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-09-23 19:50:50,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-23 19:50:50,975 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:50,975 INFO L375 BasicCegarLoop]: trace histogram [60, 1, 1, 1] [2018-09-23 19:50:50,975 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:50,976 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:50,976 INFO L82 PathProgramCache]: Analyzing trace with hash 88142816, now seen corresponding path program 60 times [2018-09-23 19:50:50,976 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:50,976 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:50,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:50,976 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:50,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:50,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:52,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:52,793 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:52,793 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 [2018-09-23 19:50:52,800 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:50:52,856 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-23 19:50:52,857 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:52,859 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:52,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:52,891 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:52,891 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-09-23 19:50:52,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-23 19:50:52,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-23 19:50:52,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-23 19:50:52,892 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 63 states. [2018-09-23 19:50:52,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:52,992 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-23 19:50:52,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-23 19:50:52,992 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 63 [2018-09-23 19:50:52,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:52,993 INFO L225 Difference]: With dead ends: 67 [2018-09-23 19:50:52,993 INFO L226 Difference]: Without dead ends: 65 [2018-09-23 19:50:52,994 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-23 19:50:52,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-23 19:50:52,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-23 19:50:52,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-23 19:50:52,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-09-23 19:50:52,996 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-09-23 19:50:52,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:52,996 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-09-23 19:50:52,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-23 19:50:52,996 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-09-23 19:50:52,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-23 19:50:52,996 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:52,996 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1, 1] [2018-09-23 19:50:52,997 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:52,997 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:52,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1562543866, now seen corresponding path program 61 times [2018-09-23 19:50:52,997 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:52,997 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:52,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:52,998 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:52,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:53,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:54,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:54,509 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:54,509 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 [2018-09-23 19:50:54,517 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:54,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:54,555 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:54,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:54,585 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:54,586 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-23 19:50:54,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-23 19:50:54,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-23 19:50:54,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-23 19:50:54,587 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 64 states. [2018-09-23 19:50:54,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:54,691 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-09-23 19:50:54,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-23 19:50:54,691 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 64 [2018-09-23 19:50:54,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:54,692 INFO L225 Difference]: With dead ends: 68 [2018-09-23 19:50:54,692 INFO L226 Difference]: Without dead ends: 66 [2018-09-23 19:50:54,693 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-23 19:50:54,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-23 19:50:54,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-09-23 19:50:54,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-23 19:50:54,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-09-23 19:50:54,696 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-09-23 19:50:54,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:54,696 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-09-23 19:50:54,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-23 19:50:54,697 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-09-23 19:50:54,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-23 19:50:54,697 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:54,697 INFO L375 BasicCegarLoop]: trace histogram [62, 1, 1, 1] [2018-09-23 19:50:54,697 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:54,698 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:54,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1194223456, now seen corresponding path program 62 times [2018-09-23 19:50:54,698 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:54,698 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:54,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:54,699 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:54,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:54,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:58,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:58,284 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:58,284 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 [2018-09-23 19:50:58,293 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:50:58,330 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:50:58,330 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:58,332 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:58,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:58,372 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:58,373 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-23 19:50:58,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-23 19:50:58,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-23 19:50:58,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-23 19:50:58,374 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 65 states. [2018-09-23 19:50:58,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:58,534 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-23 19:50:58,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-23 19:50:58,538 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 65 [2018-09-23 19:50:58,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:58,538 INFO L225 Difference]: With dead ends: 69 [2018-09-23 19:50:58,538 INFO L226 Difference]: Without dead ends: 67 [2018-09-23 19:50:58,539 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-23 19:50:58,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-23 19:50:58,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-23 19:50:58,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-23 19:50:58,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-09-23 19:50:58,542 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-09-23 19:50:58,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:58,543 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-09-23 19:50:58,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-23 19:50:58,543 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-09-23 19:50:58,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-23 19:50:58,543 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:58,543 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1, 1] [2018-09-23 19:50:58,544 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:58,544 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:58,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1633774662, now seen corresponding path program 63 times [2018-09-23 19:50:58,544 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:58,544 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:58,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:58,545 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:58,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:58,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:00,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:00,277 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:00,277 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 [2018-09-23 19:51:00,289 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:51:00,407 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-09-23 19:51:00,407 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:00,409 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:00,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:00,442 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:00,442 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-23 19:51:00,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-23 19:51:00,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-23 19:51:00,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-23 19:51:00,443 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 66 states. [2018-09-23 19:51:00,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:00,552 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-09-23 19:51:00,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-23 19:51:00,553 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 66 [2018-09-23 19:51:00,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:00,554 INFO L225 Difference]: With dead ends: 70 [2018-09-23 19:51:00,554 INFO L226 Difference]: Without dead ends: 68 [2018-09-23 19:51:00,554 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-23 19:51:00,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-23 19:51:00,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-09-23 19:51:00,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-23 19:51:00,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-09-23 19:51:00,558 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-09-23 19:51:00,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:00,558 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-09-23 19:51:00,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-23 19:51:00,558 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-09-23 19:51:00,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-09-23 19:51:00,559 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:00,559 INFO L375 BasicCegarLoop]: trace histogram [64, 1, 1, 1] [2018-09-23 19:51:00,559 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:00,559 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:00,559 INFO L82 PathProgramCache]: Analyzing trace with hash -892596896, now seen corresponding path program 64 times [2018-09-23 19:51:00,559 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:00,559 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:00,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:00,561 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:00,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:00,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:03,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:03,415 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:03,415 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 [2018-09-23 19:51:03,426 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:51:03,464 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:51:03,464 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:03,467 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:03,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:03,508 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:03,509 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-23 19:51:03,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-23 19:51:03,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-23 19:51:03,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-23 19:51:03,510 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 67 states. [2018-09-23 19:51:03,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:03,890 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-23 19:51:03,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-23 19:51:03,890 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 67 [2018-09-23 19:51:03,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:03,891 INFO L225 Difference]: With dead ends: 71 [2018-09-23 19:51:03,891 INFO L226 Difference]: Without dead ends: 69 [2018-09-23 19:51:03,892 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-23 19:51:03,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-23 19:51:03,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-23 19:51:03,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-23 19:51:03,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-09-23 19:51:03,895 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-09-23 19:51:03,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:03,895 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-09-23 19:51:03,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-23 19:51:03,895 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-09-23 19:51:03,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-23 19:51:03,896 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:03,896 INFO L375 BasicCegarLoop]: trace histogram [65, 1, 1, 1] [2018-09-23 19:51:03,896 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:03,896 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:03,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1900703866, now seen corresponding path program 65 times [2018-09-23 19:51:03,896 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:03,896 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:03,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:03,897 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:03,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:03,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:06,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:06,239 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:06,239 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:51:06,247 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:51:06,302 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-09-23 19:51:06,302 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:06,306 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:06,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:06,349 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:06,350 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-23 19:51:06,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-23 19:51:06,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-23 19:51:06,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-23 19:51:06,351 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 68 states. [2018-09-23 19:51:06,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:06,454 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-09-23 19:51:06,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-23 19:51:06,455 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 68 [2018-09-23 19:51:06,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:06,455 INFO L225 Difference]: With dead ends: 72 [2018-09-23 19:51:06,456 INFO L226 Difference]: Without dead ends: 70 [2018-09-23 19:51:06,456 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-23 19:51:06,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-23 19:51:06,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-09-23 19:51:06,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-23 19:51:06,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-09-23 19:51:06,459 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-09-23 19:51:06,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:06,459 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-09-23 19:51:06,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-23 19:51:06,459 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-09-23 19:51:06,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-23 19:51:06,459 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:06,460 INFO L375 BasicCegarLoop]: trace histogram [66, 1, 1, 1] [2018-09-23 19:51:06,460 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:06,460 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:06,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1207718432, now seen corresponding path program 66 times [2018-09-23 19:51:06,460 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:06,460 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:06,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:06,461 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:06,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:06,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:08,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:08,451 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:08,451 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 [2018-09-23 19:51:08,461 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:51:08,517 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-09-23 19:51:08,517 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:08,520 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:08,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:08,569 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:08,569 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-09-23 19:51:08,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-23 19:51:08,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-23 19:51:08,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-23 19:51:08,571 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 69 states. [2018-09-23 19:51:09,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:09,674 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-23 19:51:09,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-23 19:51:09,674 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 69 [2018-09-23 19:51:09,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:09,675 INFO L225 Difference]: With dead ends: 73 [2018-09-23 19:51:09,675 INFO L226 Difference]: Without dead ends: 71 [2018-09-23 19:51:09,676 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-23 19:51:09,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-23 19:51:09,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-23 19:51:09,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-23 19:51:09,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-09-23 19:51:09,679 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-09-23 19:51:09,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:09,679 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-09-23 19:51:09,679 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-23 19:51:09,679 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-09-23 19:51:09,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-23 19:51:09,680 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:09,680 INFO L375 BasicCegarLoop]: trace histogram [67, 1, 1, 1] [2018-09-23 19:51:09,680 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:09,680 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:09,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1215438138, now seen corresponding path program 67 times [2018-09-23 19:51:09,680 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:09,680 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:09,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:09,681 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:09,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:09,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:11,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:11,375 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:11,375 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 [2018-09-23 19:51:11,397 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:51:11,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:11,439 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:11,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:11,472 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:11,472 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-23 19:51:11,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-23 19:51:11,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-23 19:51:11,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-23 19:51:11,473 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 70 states. [2018-09-23 19:51:11,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:11,601 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-09-23 19:51:11,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-23 19:51:11,602 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 70 [2018-09-23 19:51:11,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:11,603 INFO L225 Difference]: With dead ends: 74 [2018-09-23 19:51:11,603 INFO L226 Difference]: Without dead ends: 72 [2018-09-23 19:51:11,603 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-23 19:51:11,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-09-23 19:51:11,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-09-23 19:51:11,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-09-23 19:51:11,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-09-23 19:51:11,607 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-09-23 19:51:11,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:11,607 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-09-23 19:51:11,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-23 19:51:11,607 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-09-23 19:51:11,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-09-23 19:51:11,608 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:11,608 INFO L375 BasicCegarLoop]: trace histogram [68, 1, 1, 1] [2018-09-23 19:51:11,608 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:11,608 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:11,608 INFO L82 PathProgramCache]: Analyzing trace with hash 976119520, now seen corresponding path program 68 times [2018-09-23 19:51:11,608 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:11,609 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:11,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:11,609 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:51:11,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:11,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:13,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:13,613 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:13,613 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:51:13,619 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:51:13,660 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:51:13,660 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:13,662 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:13,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:13,697 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:13,697 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-23 19:51:13,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-23 19:51:13,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-23 19:51:13,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-23 19:51:13,698 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 71 states. [2018-09-23 19:51:13,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:13,796 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-09-23 19:51:13,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-23 19:51:13,796 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 71 [2018-09-23 19:51:13,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:13,797 INFO L225 Difference]: With dead ends: 75 [2018-09-23 19:51:13,797 INFO L226 Difference]: Without dead ends: 73 [2018-09-23 19:51:13,798 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-23 19:51:13,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-23 19:51:13,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-23 19:51:13,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-23 19:51:13,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-09-23 19:51:13,801 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2018-09-23 19:51:13,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:13,801 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-09-23 19:51:13,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-23 19:51:13,801 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-09-23 19:51:13,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-23 19:51:13,802 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:13,802 INFO L375 BasicCegarLoop]: trace histogram [69, 1, 1, 1] [2018-09-23 19:51:13,802 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:13,802 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:13,802 INFO L82 PathProgramCache]: Analyzing trace with hash 194930182, now seen corresponding path program 69 times [2018-09-23 19:51:13,802 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:13,803 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:13,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:13,803 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:13,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:13,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:15,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:15,608 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:15,608 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 [2018-09-23 19:51:15,616 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:51:15,706 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-09-23 19:51:15,707 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:15,709 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:15,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:15,755 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:15,755 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-23 19:51:15,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-23 19:51:15,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-23 19:51:15,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-23 19:51:15,757 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 72 states. [2018-09-23 19:51:16,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:16,141 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-09-23 19:51:16,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-23 19:51:16,141 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 72 [2018-09-23 19:51:16,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:16,142 INFO L225 Difference]: With dead ends: 76 [2018-09-23 19:51:16,142 INFO L226 Difference]: Without dead ends: 74 [2018-09-23 19:51:16,143 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-23 19:51:16,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-23 19:51:16,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-09-23 19:51:16,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-23 19:51:16,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-09-23 19:51:16,146 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2018-09-23 19:51:16,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:16,146 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-09-23 19:51:16,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-23 19:51:16,146 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-09-23 19:51:16,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-09-23 19:51:16,147 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:16,147 INFO L375 BasicCegarLoop]: trace histogram [70, 1, 1, 1] [2018-09-23 19:51:16,147 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:16,147 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:16,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1747864480, now seen corresponding path program 70 times [2018-09-23 19:51:16,147 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:16,147 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:16,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:16,148 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:16,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:16,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:18,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:18,475 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:18,475 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:51:18,482 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:51:18,535 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:51:18,535 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:18,539 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:18,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:18,584 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:18,585 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-09-23 19:51:18,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-23 19:51:18,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-23 19:51:18,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-23 19:51:18,586 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 73 states. [2018-09-23 19:51:18,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:18,775 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-23 19:51:18,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-23 19:51:18,775 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 73 [2018-09-23 19:51:18,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:18,776 INFO L225 Difference]: With dead ends: 77 [2018-09-23 19:51:18,776 INFO L226 Difference]: Without dead ends: 75 [2018-09-23 19:51:18,777 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-23 19:51:18,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-23 19:51:18,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-23 19:51:18,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-23 19:51:18,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-09-23 19:51:18,780 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2018-09-23 19:51:18,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:18,780 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-09-23 19:51:18,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-23 19:51:18,781 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-09-23 19:51:18,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-23 19:51:18,781 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:18,781 INFO L375 BasicCegarLoop]: trace histogram [71, 1, 1, 1] [2018-09-23 19:51:18,782 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:18,782 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:18,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1650779834, now seen corresponding path program 71 times [2018-09-23 19:51:18,782 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:18,782 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:18,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:18,783 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:18,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:18,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:20,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:20,648 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:20,648 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:51:20,656 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:51:20,717 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-09-23 19:51:20,717 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:20,719 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:20,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:20,765 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:20,766 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-23 19:51:20,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-23 19:51:20,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-23 19:51:20,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-23 19:51:20,767 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 74 states. [2018-09-23 19:51:20,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:20,909 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-09-23 19:51:20,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-23 19:51:20,909 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 74 [2018-09-23 19:51:20,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:20,910 INFO L225 Difference]: With dead ends: 78 [2018-09-23 19:51:20,911 INFO L226 Difference]: Without dead ends: 76 [2018-09-23 19:51:20,911 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-23 19:51:20,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-09-23 19:51:20,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-09-23 19:51:20,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-23 19:51:20,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-09-23 19:51:20,914 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2018-09-23 19:51:20,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:20,915 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-09-23 19:51:20,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-23 19:51:20,915 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-09-23 19:51:20,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-09-23 19:51:20,915 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:20,915 INFO L375 BasicCegarLoop]: trace histogram [72, 1, 1, 1] [2018-09-23 19:51:20,916 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:20,916 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:20,916 INFO L82 PathProgramCache]: Analyzing trace with hash 365428832, now seen corresponding path program 72 times [2018-09-23 19:51:20,916 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:20,916 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:20,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:20,917 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:20,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:20,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:22,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:22,939 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:22,939 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 [2018-09-23 19:51:22,946 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:51:23,044 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-23 19:51:23,044 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:23,047 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:23,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:23,091 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:23,091 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-09-23 19:51:23,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-23 19:51:23,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-23 19:51:23,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-23 19:51:23,092 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 75 states. [2018-09-23 19:51:23,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:23,275 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-09-23 19:51:23,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-23 19:51:23,275 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 75 [2018-09-23 19:51:23,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:23,276 INFO L225 Difference]: With dead ends: 79 [2018-09-23 19:51:23,276 INFO L226 Difference]: Without dead ends: 77 [2018-09-23 19:51:23,276 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-23 19:51:23,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-23 19:51:23,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-23 19:51:23,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-23 19:51:23,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-09-23 19:51:23,278 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2018-09-23 19:51:23,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:23,279 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-09-23 19:51:23,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-23 19:51:23,279 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-09-23 19:51:23,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-23 19:51:23,280 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:23,281 INFO L375 BasicCegarLoop]: trace histogram [73, 1, 1, 1] [2018-09-23 19:51:23,281 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:23,281 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:23,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1556611962, now seen corresponding path program 73 times [2018-09-23 19:51:23,281 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:23,281 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:23,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:23,282 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:23,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:23,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:25,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:25,352 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:25,352 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 [2018-09-23 19:51:25,360 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:51:25,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:25,406 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:25,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:25,445 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:25,445 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-23 19:51:25,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-23 19:51:25,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-23 19:51:25,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-23 19:51:25,446 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 76 states. [2018-09-23 19:51:25,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:25,546 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-09-23 19:51:25,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-23 19:51:25,547 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 76 [2018-09-23 19:51:25,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:25,548 INFO L225 Difference]: With dead ends: 80 [2018-09-23 19:51:25,548 INFO L226 Difference]: Without dead ends: 78 [2018-09-23 19:51:25,548 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-23 19:51:25,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-09-23 19:51:25,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-09-23 19:51:25,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-09-23 19:51:25,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-09-23 19:51:25,551 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2018-09-23 19:51:25,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:25,551 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-09-23 19:51:25,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-23 19:51:25,552 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-09-23 19:51:25,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-09-23 19:51:25,552 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:25,552 INFO L375 BasicCegarLoop]: trace histogram [74, 1, 1, 1] [2018-09-23 19:51:25,552 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:25,552 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:25,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1010334432, now seen corresponding path program 74 times [2018-09-23 19:51:25,552 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:25,553 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:25,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:25,553 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:51:25,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:25,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:27,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:27,575 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:27,575 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 [2018-09-23 19:51:27,582 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:51:27,624 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:51:27,625 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:27,627 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:27,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:27,660 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:27,660 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-09-23 19:51:27,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-23 19:51:27,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-23 19:51:27,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-23 19:51:27,661 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 77 states. [2018-09-23 19:51:27,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:27,808 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-23 19:51:27,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-23 19:51:27,809 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 77 [2018-09-23 19:51:27,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:27,810 INFO L225 Difference]: With dead ends: 81 [2018-09-23 19:51:27,810 INFO L226 Difference]: Without dead ends: 79 [2018-09-23 19:51:27,810 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-23 19:51:27,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-23 19:51:27,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-23 19:51:27,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-23 19:51:27,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-09-23 19:51:27,813 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2018-09-23 19:51:27,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:27,814 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-09-23 19:51:27,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-23 19:51:27,814 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-09-23 19:51:27,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-23 19:51:27,815 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:27,815 INFO L375 BasicCegarLoop]: trace histogram [75, 1, 1, 1] [2018-09-23 19:51:27,815 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:27,815 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:27,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1255600186, now seen corresponding path program 75 times [2018-09-23 19:51:27,815 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:27,815 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:27,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:27,816 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:27,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:27,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:30,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:30,187 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:30,187 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:51:30,194 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:51:30,261 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-09-23 19:51:30,261 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:30,264 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:30,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:30,298 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:30,298 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-23 19:51:30,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-23 19:51:30,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-23 19:51:30,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-23 19:51:30,300 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 78 states. [2018-09-23 19:51:30,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:30,458 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-09-23 19:51:30,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-23 19:51:30,458 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 78 [2018-09-23 19:51:30,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:30,459 INFO L225 Difference]: With dead ends: 82 [2018-09-23 19:51:30,459 INFO L226 Difference]: Without dead ends: 80 [2018-09-23 19:51:30,460 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-23 19:51:30,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-23 19:51:30,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-09-23 19:51:30,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-23 19:51:30,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-09-23 19:51:30,463 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2018-09-23 19:51:30,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:30,464 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-09-23 19:51:30,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-23 19:51:30,464 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-09-23 19:51:30,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-09-23 19:51:30,464 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:30,464 INFO L375 BasicCegarLoop]: trace histogram [76, 1, 1, 1] [2018-09-23 19:51:30,465 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:30,465 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:30,465 INFO L82 PathProgramCache]: Analyzing trace with hash -268903968, now seen corresponding path program 76 times [2018-09-23 19:51:30,465 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:30,465 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:30,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:30,466 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:30,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:30,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:32,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:32,597 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:32,597 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:51:32,605 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:51:32,653 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:51:32,653 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:32,656 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:32,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:32,690 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:32,691 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-09-23 19:51:32,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-23 19:51:32,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-23 19:51:32,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-23 19:51:32,692 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 79 states. [2018-09-23 19:51:33,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:33,308 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-09-23 19:51:33,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-23 19:51:33,308 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 79 [2018-09-23 19:51:33,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:33,309 INFO L225 Difference]: With dead ends: 83 [2018-09-23 19:51:33,309 INFO L226 Difference]: Without dead ends: 81 [2018-09-23 19:51:33,309 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-23 19:51:33,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-23 19:51:33,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-23 19:51:33,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-23 19:51:33,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-09-23 19:51:33,311 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2018-09-23 19:51:33,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:33,312 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-09-23 19:51:33,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-23 19:51:33,312 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-09-23 19:51:33,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-23 19:51:33,312 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:33,312 INFO L375 BasicCegarLoop]: trace histogram [77, 1, 1, 1] [2018-09-23 19:51:33,312 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:33,313 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:33,313 INFO L82 PathProgramCache]: Analyzing trace with hash 253907718, now seen corresponding path program 77 times [2018-09-23 19:51:33,313 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:33,313 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:33,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:33,314 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:33,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:33,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:35,799 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:35,800 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:35,800 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 [2018-09-23 19:51:35,807 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:51:35,873 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-09-23 19:51:35,874 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:35,877 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:35,897 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:35,932 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:35,933 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-09-23 19:51:35,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-23 19:51:35,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-23 19:51:35,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-23 19:51:35,934 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 80 states. [2018-09-23 19:51:36,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:36,784 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2018-09-23 19:51:36,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-23 19:51:36,785 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 80 [2018-09-23 19:51:36,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:36,786 INFO L225 Difference]: With dead ends: 84 [2018-09-23 19:51:36,786 INFO L226 Difference]: Without dead ends: 82 [2018-09-23 19:51:36,786 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-23 19:51:36,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-23 19:51:36,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-09-23 19:51:36,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-09-23 19:51:36,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-09-23 19:51:36,789 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2018-09-23 19:51:36,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:36,790 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-09-23 19:51:36,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-23 19:51:36,790 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-09-23 19:51:36,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-09-23 19:51:36,790 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:36,790 INFO L375 BasicCegarLoop]: trace histogram [78, 1, 1, 1] [2018-09-23 19:51:36,790 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:36,791 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:36,791 INFO L82 PathProgramCache]: Analyzing trace with hash -718799200, now seen corresponding path program 78 times [2018-09-23 19:51:36,791 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:36,791 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:36,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:36,791 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:36,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:36,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:39,365 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:39,366 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:39,366 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 [2018-09-23 19:51:39,373 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:51:39,440 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2018-09-23 19:51:39,440 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:39,443 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:39,464 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:39,497 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:39,497 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-09-23 19:51:39,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-23 19:51:39,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-23 19:51:39,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-23 19:51:39,499 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 81 states. [2018-09-23 19:51:39,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:39,815 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-09-23 19:51:39,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-23 19:51:39,816 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 81 [2018-09-23 19:51:39,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:39,817 INFO L225 Difference]: With dead ends: 85 [2018-09-23 19:51:39,817 INFO L226 Difference]: Without dead ends: 83 [2018-09-23 19:51:39,818 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-23 19:51:39,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-23 19:51:39,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-23 19:51:39,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-23 19:51:39,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-09-23 19:51:39,822 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2018-09-23 19:51:39,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:39,822 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-09-23 19:51:39,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-23 19:51:39,822 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-09-23 19:51:39,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-23 19:51:39,823 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:39,823 INFO L375 BasicCegarLoop]: trace histogram [79, 1, 1, 1] [2018-09-23 19:51:39,823 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:39,823 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:39,823 INFO L82 PathProgramCache]: Analyzing trace with hash -807942586, now seen corresponding path program 79 times [2018-09-23 19:51:39,823 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:39,823 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:39,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:39,824 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:39,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:39,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:42,099 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:42,099 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:42,099 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 [2018-09-23 19:51:42,106 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:51:42,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:42,155 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:42,174 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:42,204 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:42,204 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-09-23 19:51:42,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-23 19:51:42,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-23 19:51:42,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-23 19:51:42,206 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 82 states. [2018-09-23 19:51:42,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:42,379 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-09-23 19:51:42,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-23 19:51:42,379 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 82 [2018-09-23 19:51:42,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:42,380 INFO L225 Difference]: With dead ends: 86 [2018-09-23 19:51:42,380 INFO L226 Difference]: Without dead ends: 84 [2018-09-23 19:51:42,381 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-23 19:51:42,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-09-23 19:51:42,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-09-23 19:51:42,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-09-23 19:51:42,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-09-23 19:51:42,383 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2018-09-23 19:51:42,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:42,383 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-09-23 19:51:42,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-23 19:51:42,383 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-09-23 19:51:42,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-23 19:51:42,384 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:42,384 INFO L375 BasicCegarLoop]: trace histogram [80, 1, 1, 1] [2018-09-23 19:51:42,384 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:42,385 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:42,385 INFO L82 PathProgramCache]: Analyzing trace with hash 723579744, now seen corresponding path program 80 times [2018-09-23 19:51:42,385 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:42,385 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:42,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:42,386 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:51:42,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:42,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:45,207 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:45,207 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:45,207 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:51:45,214 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:51:45,260 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:51:45,260 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:45,263 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:45,277 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:45,296 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:45,297 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-09-23 19:51:45,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-23 19:51:45,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-23 19:51:45,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-23 19:51:45,298 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 83 states. [2018-09-23 19:51:45,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:45,464 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-09-23 19:51:45,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-23 19:51:45,465 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 83 [2018-09-23 19:51:45,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:45,465 INFO L225 Difference]: With dead ends: 87 [2018-09-23 19:51:45,465 INFO L226 Difference]: Without dead ends: 85 [2018-09-23 19:51:45,466 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-23 19:51:45,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-23 19:51:45,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-23 19:51:45,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-23 19:51:45,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-09-23 19:51:45,468 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2018-09-23 19:51:45,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:45,468 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-09-23 19:51:45,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-23 19:51:45,468 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-09-23 19:51:45,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-23 19:51:45,468 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:45,468 INFO L375 BasicCegarLoop]: trace histogram [81, 1, 1, 1] [2018-09-23 19:51:45,469 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:45,469 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:45,469 INFO L82 PathProgramCache]: Analyzing trace with hash 956131718, now seen corresponding path program 81 times [2018-09-23 19:51:45,469 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:45,469 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:45,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:45,470 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:45,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:45,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:48,068 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:48,068 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:48,068 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:51:48,076 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:51:48,149 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-09-23 19:51:48,150 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:48,153 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:48,173 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:48,201 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:48,202 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-09-23 19:51:48,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-23 19:51:48,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-23 19:51:48,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-23 19:51:48,204 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 84 states. [2018-09-23 19:51:49,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:49,378 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-09-23 19:51:49,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-23 19:51:49,378 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 84 [2018-09-23 19:51:49,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:49,379 INFO L225 Difference]: With dead ends: 88 [2018-09-23 19:51:49,379 INFO L226 Difference]: Without dead ends: 86 [2018-09-23 19:51:49,379 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-23 19:51:49,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-09-23 19:51:49,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-09-23 19:51:49,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-09-23 19:51:49,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-09-23 19:51:49,381 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2018-09-23 19:51:49,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:49,381 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-09-23 19:51:49,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-23 19:51:49,381 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-09-23 19:51:49,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-09-23 19:51:49,382 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:49,382 INFO L375 BasicCegarLoop]: trace histogram [82, 1, 1, 1] [2018-09-23 19:51:49,382 INFO L423 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:49,382 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:49,382 INFO L82 PathProgramCache]: Analyzing trace with hash -424691680, now seen corresponding path program 82 times [2018-09-23 19:51:49,382 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:49,382 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:49,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:49,383 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:49,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:49,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:52,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:52,103 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:52,103 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:51:52,111 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:51:52,164 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:51:52,164 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:52,168 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:52,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:52,221 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:52,222 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-09-23 19:51:52,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-09-23 19:51:52,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-09-23 19:51:52,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-23 19:51:52,223 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 85 states. [2018-09-23 19:51:52,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:52,514 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-09-23 19:51:52,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-23 19:51:52,514 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 85 [2018-09-23 19:51:52,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:52,515 INFO L225 Difference]: With dead ends: 89 [2018-09-23 19:51:52,515 INFO L226 Difference]: Without dead ends: 87 [2018-09-23 19:51:52,516 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-23 19:51:52,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-23 19:51:52,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-09-23 19:51:52,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-23 19:51:52,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-09-23 19:51:52,519 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2018-09-23 19:51:52,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:52,519 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-09-23 19:51:52,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-09-23 19:51:52,519 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-09-23 19:51:52,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-23 19:51:52,520 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:52,520 INFO L375 BasicCegarLoop]: trace histogram [83, 1, 1, 1] [2018-09-23 19:51:52,520 INFO L423 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:52,520 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:52,521 INFO L82 PathProgramCache]: Analyzing trace with hash -280544058, now seen corresponding path program 83 times [2018-09-23 19:51:52,521 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:52,521 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:52,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:52,521 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:52,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:52,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:55,329 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:55,329 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:55,330 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:51:55,337 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:51:55,415 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-09-23 19:51:55,415 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:55,419 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:55,434 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:55,454 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:55,455 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-09-23 19:51:55,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-23 19:51:55,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-23 19:51:55,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-23 19:51:55,456 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 86 states. [2018-09-23 19:51:55,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:55,651 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2018-09-23 19:51:55,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-23 19:51:55,651 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 86 [2018-09-23 19:51:55,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:55,652 INFO L225 Difference]: With dead ends: 90 [2018-09-23 19:51:55,652 INFO L226 Difference]: Without dead ends: 88 [2018-09-23 19:51:55,653 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-23 19:51:55,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-09-23 19:51:55,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-09-23 19:51:55,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-09-23 19:51:55,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-09-23 19:51:55,655 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2018-09-23 19:51:55,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:55,656 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-09-23 19:51:55,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-23 19:51:55,656 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-09-23 19:51:55,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-09-23 19:51:55,656 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:55,656 INFO L375 BasicCegarLoop]: trace histogram [84, 1, 1, 1] [2018-09-23 19:51:55,656 INFO L423 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:55,657 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:55,657 INFO L82 PathProgramCache]: Analyzing trace with hash -106935072, now seen corresponding path program 84 times [2018-09-23 19:51:55,657 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:55,657 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:55,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:55,658 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:55,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:55,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:58,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:58,153 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:58,153 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:51:58,163 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:51:58,240 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-23 19:51:58,241 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:58,244 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:58,259 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:58,279 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:58,280 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-09-23 19:51:58,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-09-23 19:51:58,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-09-23 19:51:58,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-23 19:51:58,282 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 87 states. [2018-09-23 19:51:58,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:58,425 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-09-23 19:51:58,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-23 19:51:58,425 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 87 [2018-09-23 19:51:58,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:58,426 INFO L225 Difference]: With dead ends: 91 [2018-09-23 19:51:58,426 INFO L226 Difference]: Without dead ends: 89 [2018-09-23 19:51:58,426 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-23 19:51:58,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-23 19:51:58,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-09-23 19:51:58,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-23 19:51:58,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-09-23 19:51:58,430 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2018-09-23 19:51:58,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:58,430 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-09-23 19:51:58,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-09-23 19:51:58,430 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-09-23 19:51:58,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-23 19:51:58,430 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:58,431 INFO L375 BasicCegarLoop]: trace histogram [85, 1, 1, 1] [2018-09-23 19:51:58,431 INFO L423 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:58,431 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:58,431 INFO L82 PathProgramCache]: Analyzing trace with hash 979976198, now seen corresponding path program 85 times [2018-09-23 19:51:58,431 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:58,431 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:58,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:58,432 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:58,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:58,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:01,322 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:01,322 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:01,322 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:52:01,331 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:52:01,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:01,384 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:01,400 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:01,420 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:01,421 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-09-23 19:52:01,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-23 19:52:01,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-23 19:52:01,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-23 19:52:01,423 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 88 states. [2018-09-23 19:52:01,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:01,584 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2018-09-23 19:52:01,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-23 19:52:01,584 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 88 [2018-09-23 19:52:01,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:01,585 INFO L225 Difference]: With dead ends: 92 [2018-09-23 19:52:01,585 INFO L226 Difference]: Without dead ends: 90 [2018-09-23 19:52:01,586 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-23 19:52:01,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-09-23 19:52:01,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-09-23 19:52:01,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-09-23 19:52:01,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-09-23 19:52:01,589 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2018-09-23 19:52:01,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:01,591 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-09-23 19:52:01,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-23 19:52:01,591 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-09-23 19:52:01,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-09-23 19:52:01,591 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:01,592 INFO L375 BasicCegarLoop]: trace histogram [86, 1, 1, 1] [2018-09-23 19:52:01,592 INFO L423 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:01,592 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:01,593 INFO L82 PathProgramCache]: Analyzing trace with hash 314487200, now seen corresponding path program 86 times [2018-09-23 19:52:01,593 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:01,593 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:01,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:01,594 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:52:01,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:01,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:04,541 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:04,541 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:04,541 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:52:04,548 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:52:04,600 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:52:04,601 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:04,603 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:04,618 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:04,638 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:04,638 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-09-23 19:52:04,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-23 19:52:04,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-23 19:52:04,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-23 19:52:04,640 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 89 states. [2018-09-23 19:52:04,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:04,840 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-09-23 19:52:04,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-23 19:52:04,840 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 89 [2018-09-23 19:52:04,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:04,841 INFO L225 Difference]: With dead ends: 93 [2018-09-23 19:52:04,841 INFO L226 Difference]: Without dead ends: 91 [2018-09-23 19:52:04,842 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-23 19:52:04,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-23 19:52:04,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-23 19:52:04,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-23 19:52:04,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-09-23 19:52:04,844 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2018-09-23 19:52:04,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:04,845 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-09-23 19:52:04,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-23 19:52:04,845 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-09-23 19:52:04,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-23 19:52:04,845 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:04,845 INFO L375 BasicCegarLoop]: trace histogram [87, 1, 1, 1] [2018-09-23 19:52:04,845 INFO L423 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:04,845 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:04,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1159164742, now seen corresponding path program 87 times [2018-09-23 19:52:04,846 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:04,846 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:04,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:04,846 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:04,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:04,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:07,601 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:07,601 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:07,601 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:52:07,609 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:52:07,690 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-09-23 19:52:07,690 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:07,693 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:07,714 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:07,745 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:07,746 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-09-23 19:52:07,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-23 19:52:07,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-23 19:52:07,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-23 19:52:07,748 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 90 states. [2018-09-23 19:52:07,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:07,938 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-09-23 19:52:07,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-23 19:52:07,938 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 90 [2018-09-23 19:52:07,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:07,939 INFO L225 Difference]: With dead ends: 94 [2018-09-23 19:52:07,939 INFO L226 Difference]: Without dead ends: 92 [2018-09-23 19:52:07,939 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-23 19:52:07,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-09-23 19:52:07,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-09-23 19:52:07,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-09-23 19:52:07,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-09-23 19:52:07,941 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2018-09-23 19:52:07,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:07,941 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-09-23 19:52:07,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-23 19:52:07,941 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-09-23 19:52:07,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-09-23 19:52:07,942 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:07,942 INFO L375 BasicCegarLoop]: trace histogram [88, 1, 1, 1] [2018-09-23 19:52:07,942 INFO L423 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:07,942 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:07,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1574364768, now seen corresponding path program 88 times [2018-09-23 19:52:07,942 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:07,942 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:07,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:07,943 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:07,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:07,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:11,100 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:11,100 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:11,100 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:52:11,115 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:52:11,170 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:52:11,170 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:11,173 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:11,188 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:11,209 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:11,209 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-09-23 19:52:11,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-09-23 19:52:11,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-09-23 19:52:11,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-23 19:52:11,211 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 91 states. [2018-09-23 19:52:11,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:11,335 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-09-23 19:52:11,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-23 19:52:11,335 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 91 [2018-09-23 19:52:11,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:11,336 INFO L225 Difference]: With dead ends: 95 [2018-09-23 19:52:11,336 INFO L226 Difference]: Without dead ends: 93 [2018-09-23 19:52:11,337 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-23 19:52:11,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-23 19:52:11,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-23 19:52:11,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-23 19:52:11,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-09-23 19:52:11,339 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2018-09-23 19:52:11,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:11,340 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-09-23 19:52:11,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-09-23 19:52:11,340 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-09-23 19:52:11,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-23 19:52:11,340 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:11,340 INFO L375 BasicCegarLoop]: trace histogram [89, 1, 1, 1] [2018-09-23 19:52:11,340 INFO L423 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:11,341 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:11,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1560663686, now seen corresponding path program 89 times [2018-09-23 19:52:11,341 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:11,341 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:11,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:11,341 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:11,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:11,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:14,219 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:14,219 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:14,219 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:52:14,227 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:52:14,359 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-09-23 19:52:14,360 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:14,364 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:14,387 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:14,416 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:14,417 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-09-23 19:52:14,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-23 19:52:14,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-23 19:52:14,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-23 19:52:14,418 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 92 states. [2018-09-23 19:52:14,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:14,710 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2018-09-23 19:52:14,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-23 19:52:14,711 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 92 [2018-09-23 19:52:14,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:14,712 INFO L225 Difference]: With dead ends: 96 [2018-09-23 19:52:14,712 INFO L226 Difference]: Without dead ends: 94 [2018-09-23 19:52:14,712 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-23 19:52:14,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-09-23 19:52:14,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-09-23 19:52:14,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-09-23 19:52:14,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-09-23 19:52:14,715 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2018-09-23 19:52:14,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:14,716 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-09-23 19:52:14,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-23 19:52:14,716 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-09-23 19:52:14,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-09-23 19:52:14,716 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:14,716 INFO L375 BasicCegarLoop]: trace histogram [90, 1, 1, 1] [2018-09-23 19:52:14,716 INFO L423 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:14,716 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:14,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1135930144, now seen corresponding path program 90 times [2018-09-23 19:52:14,717 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:14,717 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:14,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:14,717 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:14,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:14,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:17,575 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:17,575 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:17,575 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:52:17,583 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:52:17,667 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2018-09-23 19:52:17,667 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:17,670 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:17,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:17,707 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:17,707 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-09-23 19:52:17,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-09-23 19:52:17,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-09-23 19:52:17,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-23 19:52:17,708 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 93 states. [2018-09-23 19:52:17,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:17,930 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-09-23 19:52:17,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-23 19:52:17,930 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 93 [2018-09-23 19:52:17,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:17,931 INFO L225 Difference]: With dead ends: 97 [2018-09-23 19:52:17,932 INFO L226 Difference]: Without dead ends: 95 [2018-09-23 19:52:17,932 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-23 19:52:17,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-23 19:52:17,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-23 19:52:17,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-23 19:52:17,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-09-23 19:52:17,936 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2018-09-23 19:52:17,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:17,936 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-09-23 19:52:17,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-09-23 19:52:17,936 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-09-23 19:52:17,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-23 19:52:17,937 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:17,937 INFO L375 BasicCegarLoop]: trace histogram [91, 1, 1, 1] [2018-09-23 19:52:17,937 INFO L423 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:17,937 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:17,937 INFO L82 PathProgramCache]: Analyzing trace with hash 854092230, now seen corresponding path program 91 times [2018-09-23 19:52:17,937 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:17,937 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:17,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:17,938 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:17,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:17,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:21,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:21,173 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:21,173 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:52:21,181 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:52:21,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:21,238 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:21,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:21,274 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:21,274 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-09-23 19:52:21,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-23 19:52:21,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-23 19:52:21,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-23 19:52:21,276 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 94 states. [2018-09-23 19:52:21,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:21,454 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-09-23 19:52:21,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-23 19:52:21,455 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 94 [2018-09-23 19:52:21,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:21,455 INFO L225 Difference]: With dead ends: 98 [2018-09-23 19:52:21,456 INFO L226 Difference]: Without dead ends: 96 [2018-09-23 19:52:21,456 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-23 19:52:21,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-09-23 19:52:21,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-09-23 19:52:21,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-09-23 19:52:21,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-09-23 19:52:21,459 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2018-09-23 19:52:21,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:21,459 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-09-23 19:52:21,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-23 19:52:21,459 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-09-23 19:52:21,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-09-23 19:52:21,460 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:21,460 INFO L375 BasicCegarLoop]: trace histogram [92, 1, 1, 1] [2018-09-23 19:52:21,460 INFO L423 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:21,460 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:21,460 INFO L82 PathProgramCache]: Analyzing trace with hash 707051488, now seen corresponding path program 92 times [2018-09-23 19:52:21,460 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:21,460 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:21,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:21,461 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:52:21,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:21,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:24,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:24,472 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:24,473 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:52:24,480 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:52:24,533 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:52:24,533 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:24,536 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:24,559 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:24,582 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:24,583 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-09-23 19:52:24,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-09-23 19:52:24,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-09-23 19:52:24,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-23 19:52:24,584 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 95 states. [2018-09-23 19:52:24,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:24,774 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-09-23 19:52:24,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-23 19:52:24,774 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 95 [2018-09-23 19:52:24,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:24,775 INFO L225 Difference]: With dead ends: 99 [2018-09-23 19:52:24,775 INFO L226 Difference]: Without dead ends: 97 [2018-09-23 19:52:24,775 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-23 19:52:24,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-23 19:52:24,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-23 19:52:24,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-23 19:52:24,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-09-23 19:52:24,777 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2018-09-23 19:52:24,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:24,777 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-09-23 19:52:24,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-09-23 19:52:24,778 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-09-23 19:52:24,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-23 19:52:24,778 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:24,778 INFO L375 BasicCegarLoop]: trace histogram [93, 1, 1, 1] [2018-09-23 19:52:24,778 INFO L423 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:24,778 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:24,779 INFO L82 PathProgramCache]: Analyzing trace with hash 443755782, now seen corresponding path program 93 times [2018-09-23 19:52:24,779 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:24,779 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:24,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:24,779 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:24,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:24,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:28,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:28,632 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:28,632 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:52:28,640 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:52:28,729 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-09-23 19:52:28,729 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:28,732 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:28,756 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:28,787 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:28,787 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-09-23 19:52:28,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-23 19:52:28,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-23 19:52:28,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-23 19:52:28,789 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 96 states. [2018-09-23 19:52:28,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:28,957 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2018-09-23 19:52:28,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-23 19:52:28,957 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 96 [2018-09-23 19:52:28,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:28,958 INFO L225 Difference]: With dead ends: 100 [2018-09-23 19:52:28,958 INFO L226 Difference]: Without dead ends: 98 [2018-09-23 19:52:28,959 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-23 19:52:28,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-09-23 19:52:28,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-09-23 19:52:28,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-09-23 19:52:28,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-09-23 19:52:28,962 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2018-09-23 19:52:28,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:28,962 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-09-23 19:52:28,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-23 19:52:28,962 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-09-23 19:52:28,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-09-23 19:52:28,963 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:28,963 INFO L375 BasicCegarLoop]: trace histogram [94, 1, 1, 1] [2018-09-23 19:52:28,963 INFO L423 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:28,963 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:28,963 INFO L82 PathProgramCache]: Analyzing trace with hash 871523488, now seen corresponding path program 94 times [2018-09-23 19:52:28,964 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:28,964 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:28,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:28,964 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:28,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:28,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:32,436 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:32,437 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:32,437 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:52:32,444 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:52:32,506 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:52:32,507 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:32,510 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:32,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:32,563 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:32,563 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-09-23 19:52:32,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-09-23 19:52:32,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-09-23 19:52:32,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-23 19:52:32,565 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 97 states. [2018-09-23 19:52:32,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:32,777 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-09-23 19:52:32,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-23 19:52:32,778 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 97 [2018-09-23 19:52:32,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:32,779 INFO L225 Difference]: With dead ends: 101 [2018-09-23 19:52:32,779 INFO L226 Difference]: Without dead ends: 99 [2018-09-23 19:52:32,779 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-23 19:52:32,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-23 19:52:32,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-23 19:52:32,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-23 19:52:32,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-09-23 19:52:32,783 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2018-09-23 19:52:32,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:32,783 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-09-23 19:52:32,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-09-23 19:52:32,783 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-09-23 19:52:32,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-23 19:52:32,784 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:32,784 INFO L375 BasicCegarLoop]: trace histogram [95, 1, 1, 1] [2018-09-23 19:52:32,784 INFO L423 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:32,784 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:32,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1247420486, now seen corresponding path program 95 times [2018-09-23 19:52:32,785 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:32,785 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:32,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:32,785 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:32,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:32,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:36,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:36,359 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:36,359 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:52:36,369 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:52:36,458 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-09-23 19:52:36,458 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:36,461 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:36,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:36,499 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:36,499 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-09-23 19:52:36,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-23 19:52:36,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-23 19:52:36,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-09-23 19:52:36,500 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 98 states. [2018-09-23 19:52:36,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:36,673 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2018-09-23 19:52:36,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-23 19:52:36,673 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 98 [2018-09-23 19:52:36,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:36,674 INFO L225 Difference]: With dead ends: 102 [2018-09-23 19:52:36,674 INFO L226 Difference]: Without dead ends: 100 [2018-09-23 19:52:36,675 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-09-23 19:52:36,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-09-23 19:52:36,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-09-23 19:52:36,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-23 19:52:36,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-09-23 19:52:36,677 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2018-09-23 19:52:36,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:36,677 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-09-23 19:52:36,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-23 19:52:36,677 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-09-23 19:52:36,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-09-23 19:52:36,678 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:36,678 INFO L375 BasicCegarLoop]: trace histogram [96, 1, 1, 1] [2018-09-23 19:52:36,678 INFO L423 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:36,679 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:36,679 INFO L82 PathProgramCache]: Analyzing trace with hash 15325536, now seen corresponding path program 96 times [2018-09-23 19:52:36,679 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:36,679 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:36,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:36,679 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:36,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:36,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:40,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:40,147 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:40,147 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:52:40,155 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:52:40,246 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-23 19:52:40,246 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:40,249 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:40,266 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:40,286 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:40,287 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-09-23 19:52:40,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-09-23 19:52:40,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-09-23 19:52:40,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-09-23 19:52:40,288 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 99 states. [2018-09-23 19:52:40,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:40,545 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-09-23 19:52:40,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-23 19:52:40,545 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 99 [2018-09-23 19:52:40,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:40,546 INFO L225 Difference]: With dead ends: 103 [2018-09-23 19:52:40,546 INFO L226 Difference]: Without dead ends: 101 [2018-09-23 19:52:40,547 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-09-23 19:52:40,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-23 19:52:40,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-23 19:52:40,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-23 19:52:40,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-09-23 19:52:40,550 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2018-09-23 19:52:40,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:40,550 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-09-23 19:52:40,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-09-23 19:52:40,550 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-09-23 19:52:40,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-23 19:52:40,551 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:40,551 INFO L375 BasicCegarLoop]: trace histogram [97, 1, 1, 1] [2018-09-23 19:52:40,551 INFO L423 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:40,551 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:40,551 INFO L82 PathProgramCache]: Analyzing trace with hash 475087750, now seen corresponding path program 97 times [2018-09-23 19:52:40,551 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:40,552 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:40,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:40,552 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:40,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:40,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:43,975 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:43,975 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:43,975 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:52:43,983 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:52:44,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:44,044 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:44,061 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:44,083 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:44,083 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-09-23 19:52:44,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-23 19:52:44,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-23 19:52:44,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-09-23 19:52:44,085 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 100 states. [2018-09-23 19:52:44,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:44,359 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2018-09-23 19:52:44,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-09-23 19:52:44,360 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 100 [2018-09-23 19:52:44,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:44,361 INFO L225 Difference]: With dead ends: 104 [2018-09-23 19:52:44,361 INFO L226 Difference]: Without dead ends: 102 [2018-09-23 19:52:44,362 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-09-23 19:52:44,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-09-23 19:52:44,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-09-23 19:52:44,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-09-23 19:52:44,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-09-23 19:52:44,365 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2018-09-23 19:52:44,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:44,365 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-09-23 19:52:44,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-23 19:52:44,365 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-09-23 19:52:44,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-09-23 19:52:44,366 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:44,366 INFO L375 BasicCegarLoop]: trace histogram [98, 1, 1, 1] [2018-09-23 19:52:44,366 INFO L423 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:44,366 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:44,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1842814496, now seen corresponding path program 98 times [2018-09-23 19:52:44,366 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:44,366 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:44,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:44,367 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:52:44,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:44,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:48,210 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:48,210 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:48,210 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:52:48,217 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:52:48,276 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:52:48,276 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:48,279 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:48,297 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:48,318 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:48,318 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-09-23 19:52:48,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-23 19:52:48,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-23 19:52:48,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-09-23 19:52:48,320 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 101 states. [2018-09-23 19:52:48,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:48,585 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-09-23 19:52:48,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-09-23 19:52:48,585 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 101 [2018-09-23 19:52:48,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:48,586 INFO L225 Difference]: With dead ends: 105 [2018-09-23 19:52:48,586 INFO L226 Difference]: Without dead ends: 103 [2018-09-23 19:52:48,587 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-09-23 19:52:48,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-23 19:52:48,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-23 19:52:48,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-23 19:52:48,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-09-23 19:52:48,589 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2018-09-23 19:52:48,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:48,589 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-09-23 19:52:48,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-23 19:52:48,589 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-09-23 19:52:48,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-23 19:52:48,590 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:48,590 INFO L375 BasicCegarLoop]: trace histogram [99, 1, 1, 1] [2018-09-23 19:52:48,590 INFO L423 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:48,591 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:48,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1292670662, now seen corresponding path program 99 times [2018-09-23 19:52:48,591 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:48,591 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:48,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:48,591 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:48,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:48,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:52,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:52,389 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:52,389 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:52:52,397 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:52:52,499 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2018-09-23 19:52:52,500 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:52,503 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:52,534 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:52,554 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:52,554 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-09-23 19:52:52,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-23 19:52:52,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-23 19:52:52,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-09-23 19:52:52,556 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 102 states. [2018-09-23 19:52:52,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:52,766 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2018-09-23 19:52:52,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-09-23 19:52:52,767 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 102 [2018-09-23 19:52:52,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:52,768 INFO L225 Difference]: With dead ends: 106 [2018-09-23 19:52:52,768 INFO L226 Difference]: Without dead ends: 104 [2018-09-23 19:52:52,768 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-09-23 19:52:52,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-09-23 19:52:52,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-09-23 19:52:52,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-09-23 19:52:52,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-09-23 19:52:52,771 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2018-09-23 19:52:52,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:52,771 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-09-23 19:52:52,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-23 19:52:52,771 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-09-23 19:52:52,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-09-23 19:52:52,772 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:52,772 INFO L375 BasicCegarLoop]: trace histogram [100, 1, 1, 1] [2018-09-23 19:52:52,772 INFO L423 AbstractCegarLoop]: === Iteration 101 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:52,772 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:52,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1418080992, now seen corresponding path program 100 times [2018-09-23 19:52:52,773 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:52,773 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:52,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:52,773 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:52,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:52,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:56,607 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:56,607 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:56,607 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:52:56,615 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:52:56,682 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:52:56,682 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:56,686 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:56,703 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:56,724 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:56,724 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-09-23 19:52:56,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-09-23 19:52:56,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-09-23 19:52:56,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-09-23 19:52:56,725 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 103 states. [2018-09-23 19:52:57,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:57,014 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-09-23 19:52:57,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-23 19:52:57,015 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 103 [2018-09-23 19:52:57,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:57,016 INFO L225 Difference]: With dead ends: 107 [2018-09-23 19:52:57,016 INFO L226 Difference]: Without dead ends: 105 [2018-09-23 19:52:57,017 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-09-23 19:52:57,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-09-23 19:52:57,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-09-23 19:52:57,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-23 19:52:57,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-09-23 19:52:57,019 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 103 [2018-09-23 19:52:57,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:57,020 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-09-23 19:52:57,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-09-23 19:52:57,020 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-09-23 19:52:57,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-23 19:52:57,020 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:57,021 INFO L375 BasicCegarLoop]: trace histogram [101, 1, 1, 1] [2018-09-23 19:52:57,021 INFO L423 AbstractCegarLoop]: === Iteration 102 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:57,021 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:57,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1010833926, now seen corresponding path program 101 times [2018-09-23 19:52:57,021 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:57,021 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:57,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:57,022 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:57,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:57,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:01,039 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:01,039 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:01,039 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:01,047 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:53:01,153 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2018-09-23 19:53:01,154 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:01,158 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:01,177 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:01,198 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:01,199 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-09-23 19:53:01,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-23 19:53:01,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-23 19:53:01,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-09-23 19:53:01,200 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 104 states. [2018-09-23 19:53:01,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:01,367 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2018-09-23 19:53:01,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-09-23 19:53:01,368 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 104 [2018-09-23 19:53:01,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:01,369 INFO L225 Difference]: With dead ends: 108 [2018-09-23 19:53:01,369 INFO L226 Difference]: Without dead ends: 106 [2018-09-23 19:53:01,370 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-09-23 19:53:01,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-09-23 19:53:01,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-09-23 19:53:01,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-09-23 19:53:01,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-09-23 19:53:01,374 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 104 [2018-09-23 19:53:01,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:01,374 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-09-23 19:53:01,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-23 19:53:01,375 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-09-23 19:53:01,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-09-23 19:53:01,375 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:01,375 INFO L375 BasicCegarLoop]: trace histogram [102, 1, 1, 1] [2018-09-23 19:53:01,376 INFO L423 AbstractCegarLoop]: === Iteration 103 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:01,376 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:01,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1271076768, now seen corresponding path program 102 times [2018-09-23 19:53:01,376 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:01,376 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:01,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:01,377 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:01,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:01,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:05,232 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:05,233 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:05,233 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:05,240 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:53:05,342 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2018-09-23 19:53:05,342 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:05,346 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:05,367 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:05,387 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:05,387 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-09-23 19:53:05,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-09-23 19:53:05,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-09-23 19:53:05,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-09-23 19:53:05,389 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 105 states. [2018-09-23 19:53:05,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:05,709 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-09-23 19:53:05,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-09-23 19:53:05,709 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 105 [2018-09-23 19:53:05,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:05,710 INFO L225 Difference]: With dead ends: 109 [2018-09-23 19:53:05,710 INFO L226 Difference]: Without dead ends: 107 [2018-09-23 19:53:05,711 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-09-23 19:53:05,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-23 19:53:05,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-23 19:53:05,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-23 19:53:05,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-09-23 19:53:05,714 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 105 [2018-09-23 19:53:05,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:05,714 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-09-23 19:53:05,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-09-23 19:53:05,714 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-09-23 19:53:05,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-23 19:53:05,715 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:05,715 INFO L375 BasicCegarLoop]: trace histogram [103, 1, 1, 1] [2018-09-23 19:53:05,715 INFO L423 AbstractCegarLoop]: === Iteration 104 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:05,715 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:05,716 INFO L82 PathProgramCache]: Analyzing trace with hash 748670278, now seen corresponding path program 103 times [2018-09-23 19:53:05,716 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:05,716 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:05,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:05,717 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:05,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:05,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:09,640 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:09,640 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:09,640 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:09,648 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:53:09,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:09,710 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:09,736 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:09,759 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:09,759 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-09-23 19:53:09,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-23 19:53:09,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-23 19:53:09,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-09-23 19:53:09,760 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 106 states. [2018-09-23 19:53:09,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:09,984 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2018-09-23 19:53:09,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-09-23 19:53:09,985 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 106 [2018-09-23 19:53:09,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:09,986 INFO L225 Difference]: With dead ends: 110 [2018-09-23 19:53:09,986 INFO L226 Difference]: Without dead ends: 108 [2018-09-23 19:53:09,986 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-09-23 19:53:09,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-09-23 19:53:09,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-09-23 19:53:09,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-09-23 19:53:09,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-09-23 19:53:09,989 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 106 [2018-09-23 19:53:09,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:09,989 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-09-23 19:53:09,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-23 19:53:09,990 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-09-23 19:53:09,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-09-23 19:53:09,990 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:09,990 INFO L375 BasicCegarLoop]: trace histogram [104, 1, 1, 1] [2018-09-23 19:53:09,990 INFO L423 AbstractCegarLoop]: === Iteration 105 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:09,990 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:09,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1733938272, now seen corresponding path program 104 times [2018-09-23 19:53:09,991 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:09,991 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:09,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:09,991 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:53:09,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:10,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:14,210 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:14,210 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:14,210 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:14,217 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:53:14,280 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:53:14,280 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:14,283 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:14,310 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:14,340 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:14,340 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2018-09-23 19:53:14,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-09-23 19:53:14,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-09-23 19:53:14,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-09-23 19:53:14,342 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 107 states. [2018-09-23 19:53:14,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:14,798 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-09-23 19:53:14,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-09-23 19:53:14,798 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 107 [2018-09-23 19:53:14,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:14,799 INFO L225 Difference]: With dead ends: 111 [2018-09-23 19:53:14,799 INFO L226 Difference]: Without dead ends: 109 [2018-09-23 19:53:14,800 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-09-23 19:53:14,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-23 19:53:14,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-23 19:53:14,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-23 19:53:14,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-09-23 19:53:14,802 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 107 [2018-09-23 19:53:14,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:14,802 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-09-23 19:53:14,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-09-23 19:53:14,802 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-09-23 19:53:14,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-23 19:53:14,803 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:14,803 INFO L375 BasicCegarLoop]: trace histogram [105, 1, 1, 1] [2018-09-23 19:53:14,803 INFO L423 AbstractCegarLoop]: === Iteration 106 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:14,803 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:14,804 INFO L82 PathProgramCache]: Analyzing trace with hash -2082492282, now seen corresponding path program 105 times [2018-09-23 19:53:14,804 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:14,804 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:14,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:14,804 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:14,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:14,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:19,015 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:19,016 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:19,016 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:19,023 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:53:19,133 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2018-09-23 19:53:19,133 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:19,137 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:19,156 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:19,176 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:19,176 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-09-23 19:53:19,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-23 19:53:19,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-23 19:53:19,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-09-23 19:53:19,178 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 108 states. [2018-09-23 19:53:19,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:19,445 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2018-09-23 19:53:19,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-09-23 19:53:19,445 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 108 [2018-09-23 19:53:19,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:19,446 INFO L225 Difference]: With dead ends: 112 [2018-09-23 19:53:19,446 INFO L226 Difference]: Without dead ends: 110 [2018-09-23 19:53:19,447 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-09-23 19:53:19,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-09-23 19:53:19,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-09-23 19:53:19,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-09-23 19:53:19,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-09-23 19:53:19,450 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 108 [2018-09-23 19:53:19,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:19,450 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-09-23 19:53:19,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-23 19:53:19,450 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-09-23 19:53:19,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-09-23 19:53:19,451 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:19,451 INFO L375 BasicCegarLoop]: trace histogram [106, 1, 1, 1] [2018-09-23 19:53:19,451 INFO L423 AbstractCegarLoop]: === Iteration 107 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:19,451 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:19,451 INFO L82 PathProgramCache]: Analyzing trace with hash -132755168, now seen corresponding path program 106 times [2018-09-23 19:53:19,452 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:19,452 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:19,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:19,452 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:19,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:19,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:23,704 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:23,704 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:23,704 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:23,712 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:53:23,782 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:53:23,782 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:23,786 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:23,805 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:23,826 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:23,826 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 108 [2018-09-23 19:53:23,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-09-23 19:53:23,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-09-23 19:53:23,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-09-23 19:53:23,827 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 109 states. [2018-09-23 19:53:24,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:24,078 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-09-23 19:53:24,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-09-23 19:53:24,078 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 109 [2018-09-23 19:53:24,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:24,079 INFO L225 Difference]: With dead ends: 113 [2018-09-23 19:53:24,079 INFO L226 Difference]: Without dead ends: 111 [2018-09-23 19:53:24,079 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-09-23 19:53:24,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-23 19:53:24,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-09-23 19:53:24,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-23 19:53:24,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-09-23 19:53:24,083 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 109 [2018-09-23 19:53:24,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:24,083 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-09-23 19:53:24,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-09-23 19:53:24,083 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-09-23 19:53:24,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-23 19:53:24,084 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:24,084 INFO L375 BasicCegarLoop]: trace histogram [107, 1, 1, 1] [2018-09-23 19:53:24,084 INFO L423 AbstractCegarLoop]: === Iteration 108 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:24,084 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:24,085 INFO L82 PathProgramCache]: Analyzing trace with hash 179553222, now seen corresponding path program 107 times [2018-09-23 19:53:24,085 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:24,085 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:24,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:24,086 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:24,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:24,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:28,476 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:28,476 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:28,476 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:28,484 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:53:28,597 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-09-23 19:53:28,597 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:28,601 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:28,621 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:28,641 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:28,641 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109] total 109 [2018-09-23 19:53:28,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-09-23 19:53:28,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-09-23 19:53:28,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-09-23 19:53:28,643 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 110 states. [2018-09-23 19:53:28,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:28,832 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2018-09-23 19:53:28,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-09-23 19:53:28,832 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 110 [2018-09-23 19:53:28,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:28,833 INFO L225 Difference]: With dead ends: 114 [2018-09-23 19:53:28,833 INFO L226 Difference]: Without dead ends: 112 [2018-09-23 19:53:28,834 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-09-23 19:53:28,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-09-23 19:53:28,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-09-23 19:53:28,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-09-23 19:53:28,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-09-23 19:53:28,837 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 110 [2018-09-23 19:53:28,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:28,837 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-09-23 19:53:28,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-09-23 19:53:28,837 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-09-23 19:53:28,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-09-23 19:53:28,838 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:28,838 INFO L375 BasicCegarLoop]: trace histogram [108, 1, 1, 1] [2018-09-23 19:53:28,838 INFO L423 AbstractCegarLoop]: === Iteration 109 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:28,838 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:28,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1271178720, now seen corresponding path program 108 times [2018-09-23 19:53:28,838 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:28,839 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:28,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:28,839 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:28,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:28,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:33,349 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 0 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:33,349 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:33,349 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:33,357 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:53:33,466 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-09-23 19:53:33,467 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:33,471 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:33,492 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 0 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:33,512 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:33,513 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 110] total 110 [2018-09-23 19:53:33,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 111 states [2018-09-23 19:53:33,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2018-09-23 19:53:33,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-09-23 19:53:33,514 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 111 states. [2018-09-23 19:53:33,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:33,839 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-09-23 19:53:33,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-09-23 19:53:33,839 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 111 [2018-09-23 19:53:33,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:33,840 INFO L225 Difference]: With dead ends: 115 [2018-09-23 19:53:33,840 INFO L226 Difference]: Without dead ends: 113 [2018-09-23 19:53:33,841 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-09-23 19:53:33,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-23 19:53:33,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-09-23 19:53:33,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-23 19:53:33,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-09-23 19:53:33,842 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 111 [2018-09-23 19:53:33,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:33,843 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-09-23 19:53:33,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has 111 states. [2018-09-23 19:53:33,843 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-09-23 19:53:33,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-23 19:53:33,843 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:33,843 INFO L375 BasicCegarLoop]: trace histogram [109, 1, 1, 1] [2018-09-23 19:53:33,843 INFO L423 AbstractCegarLoop]: === Iteration 110 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:33,844 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:33,844 INFO L82 PathProgramCache]: Analyzing trace with hash 751830790, now seen corresponding path program 109 times [2018-09-23 19:53:33,844 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:33,844 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:33,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:33,844 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:33,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:33,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:38,168 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:38,169 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:38,169 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:38,176 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:53:38,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:38,243 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:38,264 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:38,283 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:38,284 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 111] total 111 [2018-09-23 19:53:38,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-09-23 19:53:38,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-09-23 19:53:38,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2018-09-23 19:53:38,285 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 112 states. [2018-09-23 19:53:38,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:38,531 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2018-09-23 19:53:38,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-09-23 19:53:38,531 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 112 [2018-09-23 19:53:38,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:38,532 INFO L225 Difference]: With dead ends: 116 [2018-09-23 19:53:38,532 INFO L226 Difference]: Without dead ends: 114 [2018-09-23 19:53:38,533 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2018-09-23 19:53:38,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-09-23 19:53:38,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-09-23 19:53:38,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-09-23 19:53:38,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2018-09-23 19:53:38,537 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 112 [2018-09-23 19:53:38,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:38,537 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2018-09-23 19:53:38,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-09-23 19:53:38,537 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2018-09-23 19:53:38,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-09-23 19:53:38,537 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:38,538 INFO L375 BasicCegarLoop]: trace histogram [110, 1, 1, 1] [2018-09-23 19:53:38,538 INFO L423 AbstractCegarLoop]: === Iteration 111 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:38,538 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:38,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1831914144, now seen corresponding path program 110 times [2018-09-23 19:53:38,538 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:38,538 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:38,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:38,539 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:53:38,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:38,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:43,016 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:43,016 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:43,016 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:43,024 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:53:43,088 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:53:43,088 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:43,092 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:43,112 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:43,133 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:43,133 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 112] total 112 [2018-09-23 19:53:43,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-09-23 19:53:43,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-09-23 19:53:43,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2018-09-23 19:53:43,135 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 113 states. [2018-09-23 19:53:43,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:43,507 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-09-23 19:53:43,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-09-23 19:53:43,507 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 113 [2018-09-23 19:53:43,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:43,508 INFO L225 Difference]: With dead ends: 117 [2018-09-23 19:53:43,508 INFO L226 Difference]: Without dead ends: 115 [2018-09-23 19:53:43,509 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2018-09-23 19:53:43,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-23 19:53:43,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-23 19:53:43,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-23 19:53:43,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-09-23 19:53:43,512 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 113 [2018-09-23 19:53:43,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:43,512 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-09-23 19:53:43,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-09-23 19:53:43,512 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-09-23 19:53:43,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-23 19:53:43,513 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:43,513 INFO L375 BasicCegarLoop]: trace histogram [111, 1, 1, 1] [2018-09-23 19:53:43,513 INFO L423 AbstractCegarLoop]: === Iteration 112 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:43,513 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:43,513 INFO L82 PathProgramCache]: Analyzing trace with hash 954759750, now seen corresponding path program 111 times [2018-09-23 19:53:43,513 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:43,514 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:43,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:43,514 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:43,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:43,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:48,108 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:48,108 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:48,108 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:48,115 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:53:48,267 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 57 check-sat command(s) [2018-09-23 19:53:48,267 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:48,270 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:48,290 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:48,310 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:48,311 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 113] total 113 [2018-09-23 19:53:48,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-09-23 19:53:48,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-09-23 19:53:48,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6441, Invalid=6441, Unknown=0, NotChecked=0, Total=12882 [2018-09-23 19:53:48,312 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 114 states. [2018-09-23 19:53:48,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:48,522 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2018-09-23 19:53:48,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2018-09-23 19:53:48,522 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 114 [2018-09-23 19:53:48,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:48,523 INFO L225 Difference]: With dead ends: 118 [2018-09-23 19:53:48,523 INFO L226 Difference]: Without dead ends: 116 [2018-09-23 19:53:48,524 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=6441, Invalid=6441, Unknown=0, NotChecked=0, Total=12882 [2018-09-23 19:53:48,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-09-23 19:53:48,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-09-23 19:53:48,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-09-23 19:53:48,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2018-09-23 19:53:48,527 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 114 [2018-09-23 19:53:48,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:48,528 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2018-09-23 19:53:48,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-09-23 19:53:48,528 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2018-09-23 19:53:48,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-09-23 19:53:48,528 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:48,528 INFO L375 BasicCegarLoop]: trace histogram [112, 1, 1, 1] [2018-09-23 19:53:48,529 INFO L423 AbstractCegarLoop]: === Iteration 113 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:48,529 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:48,529 INFO L82 PathProgramCache]: Analyzing trace with hash -467222688, now seen corresponding path program 112 times [2018-09-23 19:53:48,529 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:48,529 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:48,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:48,530 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:48,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:48,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-09-23 19:53:51,520 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-23 19:53:51,524 WARN L206 ceAbstractionStarter]: Timeout [2018-09-23 19:53:51,524 INFO L202 PluginConnector]: Adding new model Luxembourg.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.09 07:53:51 BoogieIcfgContainer [2018-09-23 19:53:51,524 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-23 19:53:51,525 INFO L168 Benchmark]: Toolchain (without parser) took 234846.00 ms. Allocated memory was 1.6 GB in the beginning and 1.5 GB in the end (delta: -33.0 MB). Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 72.4 MB). Peak memory consumption was 39.3 MB. Max. memory is 7.1 GB. [2018-09-23 19:53:51,526 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 19:53:51,526 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.01 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 19:53:51,527 INFO L168 Benchmark]: Boogie Preprocessor took 27.36 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 19:53:51,527 INFO L168 Benchmark]: RCFGBuilder took 279.45 ms. Allocated memory is still 1.6 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-23 19:53:51,527 INFO L168 Benchmark]: TraceAbstraction took 234486.68 ms. Allocated memory was 1.6 GB in the beginning and 1.5 GB in the end (delta: -33.0 MB). Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 51.2 MB). Peak memory consumption was 18.2 MB. Max. memory is 7.1 GB. [2018-09-23 19:53:51,529 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 46.01 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 27.36 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 279.45 ms. Allocated memory is still 1.6 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 234486.68 ms. Allocated memory was 1.6 GB in the beginning and 1.5 GB in the end (delta: -33.0 MB). Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 51.2 MB). Peak memory consumption was 18.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 24]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 24). Cancelled while BasicCegarLoop was analyzing trace of length 116 with TraceHistMax 112, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 92 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 234.4s OverallTime, 113 OverallIterations, 112 TraceHistogramMax, 20.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 338 SDtfs, 2 SDslu, 4736 SDs, 0 SdLazy, 11176 SolverSat, 165 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 14.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12878 GetRequests, 6550 SyntacticMatches, 0 SemanticMatches, 6328 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 195.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=116occurred in iteration=112, 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, 112 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.6s SsaConstructionTime, 6.1s SatisfiabilityAnalysisTime, 199.0s InterpolantComputationTime, 13101 NumberOfCodeBlocks, 13101 NumberOfCodeBlocksAsserted, 1837 NumberOfCheckSat, 12878 ConstructedInterpolants, 0 QuantifiedInterpolants, 2898440 SizeOfPredicates, 111 NumberOfNonLiveVariables, 25863 ConjunctsInSsa, 6438 ConjunctsInUnsatCore, 223 InterpolantComputations, 1 PerfectInterpolantSequences, 0/468272 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Luxembourg.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-23_19-53-51-537.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Luxembourg.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-23_19-53-51-537.csv Completed graceful shutdown