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/LexIndexValue-Pointer-Reduced.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-133090d [2018-10-04 09:25:50,423 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-04 09:25:50,425 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-04 09:25:50,436 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-04 09:25:50,437 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-04 09:25:50,438 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-04 09:25:50,439 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-04 09:25:50,440 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-04 09:25:50,442 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-04 09:25:50,443 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-04 09:25:50,444 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-04 09:25:50,444 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-04 09:25:50,445 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-04 09:25:50,446 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-04 09:25:50,447 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-04 09:25:50,447 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-04 09:25:50,448 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-04 09:25:50,450 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-04 09:25:50,452 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-04 09:25:50,454 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-04 09:25:50,455 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-04 09:25:50,456 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-04 09:25:50,458 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-04 09:25:50,458 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-04 09:25:50,459 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-04 09:25:50,460 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-04 09:25:50,461 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-04 09:25:50,461 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-04 09:25:50,462 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-04 09:25:50,463 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-04 09:25:50,464 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-04 09:25:50,464 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-04 09:25:50,465 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-04 09:25:50,465 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-04 09:25:50,466 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-04 09:25:50,467 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-04 09:25:50,467 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 [2018-10-04 09:25:50,482 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-04 09:25:50,482 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-04 09:25:50,483 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-04 09:25:50,483 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-04 09:25:50,483 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-04 09:25:50,484 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-04 09:25:50,484 INFO L133 SettingsManager]: * Use SBE=true [2018-10-04 09:25:50,484 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-04 09:25:50,484 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-04 09:25:50,484 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-04 09:25:50,485 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-04 09:25:50,485 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-04 09:25:50,485 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-04 09:25:50,485 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-04 09:25:50,485 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-04 09:25:50,486 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-04 09:25:50,486 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-04 09:25:50,486 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-04 09:25:50,486 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-04 09:25:50,486 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-04 09:25:50,486 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-04 09:25:50,487 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-04 09:25:50,487 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 09:25:50,487 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-04 09:25:50,487 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-04 09:25:50,487 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-04 09:25:50,488 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-04 09:25:50,488 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-04 09:25:50,488 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-04 09:25:50,488 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-04 09:25:50,543 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-04 09:25:50,561 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-04 09:25:50,568 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-04 09:25:50,569 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-04 09:25:50,570 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-04 09:25:50,571 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/LexIndexValue-Pointer-Reduced.bpl [2018-10-04 09:25:50,571 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/LexIndexValue-Pointer-Reduced.bpl' [2018-10-04 09:25:50,617 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-04 09:25:50,618 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-04 09:25:50,619 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-04 09:25:50,619 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-04 09:25:50,619 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-04 09:25:50,640 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:25:50" (1/1) ... [2018-10-04 09:25:50,653 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:25:50" (1/1) ... [2018-10-04 09:25:50,657 WARN L165 Inliner]: Program contained no entry procedure! [2018-10-04 09:25:50,658 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-10-04 09:25:50,658 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-10-04 09:25:50,660 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-04 09:25:50,661 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-04 09:25:50,661 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-04 09:25:50,661 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-04 09:25:50,672 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:25:50" (1/1) ... [2018-10-04 09:25:50,673 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:25:50" (1/1) ... [2018-10-04 09:25:50,673 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:25:50" (1/1) ... [2018-10-04 09:25:50,673 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:25:50" (1/1) ... [2018-10-04 09:25:50,675 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:25:50" (1/1) ... [2018-10-04 09:25:50,680 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:25:50" (1/1) ... [2018-10-04 09:25:50,680 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:25:50" (1/1) ... [2018-10-04 09:25:50,682 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-04 09:25:50,682 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-04 09:25:50,683 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-04 09:25:50,683 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-04 09:25:50,684 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:25:50" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 09:25:50,757 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-04 09:25:50,757 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-04 09:25:50,959 INFO L338 CfgBuilder]: Using library mode [2018-10-04 09:25:50,959 INFO L202 PluginConnector]: Adding new model LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 09:25:50 BoogieIcfgContainer [2018-10-04 09:25:50,960 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-04 09:25:50,961 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-04 09:25:50,961 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-04 09:25:50,964 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-04 09:25:50,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:25:50" (1/2) ... [2018-10-04 09:25:50,966 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cde8355 and model type LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 09:25:50, skipping insertion in model container [2018-10-04 09:25:50,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 09:25:50" (2/2) ... [2018-10-04 09:25:50,968 INFO L112 eAbstractionObserver]: Analyzing ICFG LexIndexValue-Pointer-Reduced.bpl [2018-10-04 09:25:50,984 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-04 09:25:50,993 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-04 09:25:51,042 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-04 09:25:51,043 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-04 09:25:51,043 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-04 09:25:51,043 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-04 09:25:51,043 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-04 09:25:51,044 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-04 09:25:51,044 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-04 09:25:51,044 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-04 09:25:51,044 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-04 09:25:51,061 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-10-04 09:25:51,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-10-04 09:25:51,076 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:51,077 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-10-04 09:25:51,079 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:51,087 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:51,087 INFO L82 PathProgramCache]: Analyzing trace with hash 29920, now seen corresponding path program 1 times [2018-10-04 09:25:51,090 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:51,090 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:51,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:51,136 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:25:51,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:51,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:51,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:51,245 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 09:25:51,245 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-10-04 09:25:51,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-04 09:25:51,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-04 09:25:51,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-04 09:25:51,265 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-10-04 09:25:51,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:51,367 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-04 09:25:51,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-04 09:25:51,369 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-10-04 09:25:51,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:51,380 INFO L225 Difference]: With dead ends: 11 [2018-10-04 09:25:51,381 INFO L226 Difference]: Without dead ends: 6 [2018-10-04 09:25:51,385 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-04 09:25:51,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-10-04 09:25:51,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-10-04 09:25:51,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-10-04 09:25:51,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-10-04 09:25:51,427 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 3 [2018-10-04 09:25:51,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:51,428 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-10-04 09:25:51,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-04 09:25:51,429 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-10-04 09:25:51,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-04 09:25:51,429 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:51,430 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-10-04 09:25:51,430 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:51,430 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:51,430 INFO L82 PathProgramCache]: Analyzing trace with hash 28754210, now seen corresponding path program 1 times [2018-10-04 09:25:51,431 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:51,431 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:51,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:51,433 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:25:51,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:51,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:51,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:51,568 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:51,568 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:51,579 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:25:51,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:51,611 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:51,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:51,856 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:51,856 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2018-10-04 09:25:51,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-04 09:25:51,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-04 09:25:51,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-04 09:25:51,858 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 6 states. [2018-10-04 09:25:51,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:51,998 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-10-04 09:25:51,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-04 09:25:51,998 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2018-10-04 09:25:51,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:51,999 INFO L225 Difference]: With dead ends: 9 [2018-10-04 09:25:51,999 INFO L226 Difference]: Without dead ends: 8 [2018-10-04 09:25:52,000 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-04 09:25:52,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-04 09:25:52,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-10-04 09:25:52,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-04 09:25:52,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-10-04 09:25:52,003 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 5 [2018-10-04 09:25:52,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:52,004 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-10-04 09:25:52,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-04 09:25:52,004 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-10-04 09:25:52,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-04 09:25:52,004 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:52,005 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1] [2018-10-04 09:25:52,005 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:52,005 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:52,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1862993124, now seen corresponding path program 2 times [2018-10-04 09:25:52,006 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:52,006 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:52,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:52,007 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:25:52,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:52,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:52,150 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:52,150 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:52,150 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:52,162 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:25:52,194 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:25:52,194 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:25:52,198 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:52,348 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:52,368 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:52,368 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2018-10-04 09:25:52,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 09:25:52,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 09:25:52,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:25:52,370 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 8 states. [2018-10-04 09:25:52,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:52,492 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-04 09:25:52,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 09:25:52,493 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2018-10-04 09:25:52,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:52,493 INFO L225 Difference]: With dead ends: 11 [2018-10-04 09:25:52,494 INFO L226 Difference]: Without dead ends: 10 [2018-10-04 09:25:52,494 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:25:52,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-04 09:25:52,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-04 09:25:52,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-04 09:25:52,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-10-04 09:25:52,499 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2018-10-04 09:25:52,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:52,499 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-10-04 09:25:52,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 09:25:52,499 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-10-04 09:25:52,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-04 09:25:52,500 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:52,500 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1] [2018-10-04 09:25:52,501 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:52,501 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:52,501 INFO L82 PathProgramCache]: Analyzing trace with hash -664969178, now seen corresponding path program 3 times [2018-10-04 09:25:52,501 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:52,502 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:52,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:52,503 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:25:52,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:52,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:52,604 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:52,604 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:52,605 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:52,614 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:25:52,627 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-04 09:25:52,627 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:25:52,628 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:52,870 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:52,891 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:52,891 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2018-10-04 09:25:52,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:25:52,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:25:52,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:25:52,893 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 10 states. [2018-10-04 09:25:52,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:52,950 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-10-04 09:25:52,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 09:25:52,951 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2018-10-04 09:25:52,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:52,952 INFO L225 Difference]: With dead ends: 13 [2018-10-04 09:25:52,952 INFO L226 Difference]: Without dead ends: 12 [2018-10-04 09:25:52,953 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:25:52,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-04 09:25:52,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-04 09:25:52,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-04 09:25:52,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-10-04 09:25:52,957 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2018-10-04 09:25:52,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:52,958 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-10-04 09:25:52,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:25:52,958 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-10-04 09:25:52,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-04 09:25:52,958 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:52,958 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1] [2018-10-04 09:25:52,959 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:52,959 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:52,959 INFO L82 PathProgramCache]: Analyzing trace with hash 914748136, now seen corresponding path program 4 times [2018-10-04 09:25:52,959 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:52,959 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:52,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:52,960 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:25:52,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:52,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:53,135 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:53,135 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:53,136 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:53,149 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:25:53,158 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:25:53,158 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:25:53,160 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:53,286 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:53,307 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:53,307 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2018-10-04 09:25:53,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-04 09:25:53,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-04 09:25:53,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2018-10-04 09:25:53,309 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 12 states. [2018-10-04 09:25:53,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:53,374 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-10-04 09:25:53,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 09:25:53,375 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2018-10-04 09:25:53,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:53,375 INFO L225 Difference]: With dead ends: 15 [2018-10-04 09:25:53,376 INFO L226 Difference]: Without dead ends: 14 [2018-10-04 09:25:53,376 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2018-10-04 09:25:53,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-04 09:25:53,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-04 09:25:53,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-04 09:25:53,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-04 09:25:53,380 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2018-10-04 09:25:53,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:53,380 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-04 09:25:53,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-04 09:25:53,383 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-04 09:25:53,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-04 09:25:53,384 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:53,384 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1] [2018-10-04 09:25:53,384 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:53,385 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:53,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1395335894, now seen corresponding path program 5 times [2018-10-04 09:25:53,386 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:53,387 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:53,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:53,388 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:25:53,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:53,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:53,761 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:53,761 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:53,761 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:53,780 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:25:53,843 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-04 09:25:53,843 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:25:53,845 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:53,979 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:54,000 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:54,000 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2018-10-04 09:25:54,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 09:25:54,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 09:25:54,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2018-10-04 09:25:54,001 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 14 states. [2018-10-04 09:25:54,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:54,102 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-04 09:25:54,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 09:25:54,105 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-10-04 09:25:54,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:54,106 INFO L225 Difference]: With dead ends: 17 [2018-10-04 09:25:54,106 INFO L226 Difference]: Without dead ends: 16 [2018-10-04 09:25:54,106 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2018-10-04 09:25:54,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-04 09:25:54,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-04 09:25:54,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-04 09:25:54,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-10-04 09:25:54,111 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2018-10-04 09:25:54,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:54,111 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-10-04 09:25:54,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 09:25:54,113 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-10-04 09:25:54,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:25:54,113 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:54,114 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1] [2018-10-04 09:25:54,114 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:54,114 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:54,114 INFO L82 PathProgramCache]: Analyzing trace with hash -887996692, now seen corresponding path program 6 times [2018-10-04 09:25:54,114 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:54,114 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:54,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:54,115 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:25:54,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:54,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:54,229 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:54,230 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:54,230 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:54,238 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:25:54,246 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-04 09:25:54,246 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:25:54,248 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:54,380 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:54,405 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:54,405 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2018-10-04 09:25:54,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-04 09:25:54,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-04 09:25:54,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2018-10-04 09:25:54,407 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 16 states. [2018-10-04 09:25:54,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:54,460 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-04 09:25:54,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:25:54,460 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 15 [2018-10-04 09:25:54,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:54,462 INFO L225 Difference]: With dead ends: 19 [2018-10-04 09:25:54,462 INFO L226 Difference]: Without dead ends: 18 [2018-10-04 09:25:54,463 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2018-10-04 09:25:54,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-04 09:25:54,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-04 09:25:54,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-04 09:25:54,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-04 09:25:54,468 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2018-10-04 09:25:54,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:54,468 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-04 09:25:54,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-04 09:25:54,469 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-04 09:25:54,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:25:54,469 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:54,469 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1] [2018-10-04 09:25:54,470 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:54,470 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:54,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1333671982, now seen corresponding path program 7 times [2018-10-04 09:25:54,470 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:54,470 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:54,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:54,471 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:25:54,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:54,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:54,652 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:54,653 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:54,653 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:54,668 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:25:54,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:54,676 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:54,869 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:54,889 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:54,890 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2018-10-04 09:25:54,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-04 09:25:54,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-04 09:25:54,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-10-04 09:25:54,891 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 18 states. [2018-10-04 09:25:54,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:54,950 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-04 09:25:54,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:25:54,951 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 17 [2018-10-04 09:25:54,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:54,952 INFO L225 Difference]: With dead ends: 21 [2018-10-04 09:25:54,952 INFO L226 Difference]: Without dead ends: 20 [2018-10-04 09:25:54,952 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-10-04 09:25:54,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-04 09:25:54,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-04 09:25:54,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-04 09:25:54,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-10-04 09:25:54,957 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2018-10-04 09:25:54,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:54,957 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-10-04 09:25:54,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-04 09:25:54,957 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-10-04 09:25:54,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:25:54,958 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:54,958 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1] [2018-10-04 09:25:54,958 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:54,959 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:54,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1758521584, now seen corresponding path program 8 times [2018-10-04 09:25:54,959 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:54,959 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:54,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:54,960 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:25:54,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:54,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:55,091 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:55,092 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:55,092 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:55,100 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:25:55,107 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:25:55,107 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:25:55,109 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:55,286 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:55,306 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:55,306 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2018-10-04 09:25:55,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 09:25:55,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 09:25:55,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2018-10-04 09:25:55,307 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 20 states. [2018-10-04 09:25:55,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:55,386 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-04 09:25:55,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:25:55,387 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 19 [2018-10-04 09:25:55,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:55,388 INFO L225 Difference]: With dead ends: 23 [2018-10-04 09:25:55,388 INFO L226 Difference]: Without dead ends: 22 [2018-10-04 09:25:55,389 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2018-10-04 09:25:55,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-04 09:25:55,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-04 09:25:55,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-04 09:25:55,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-10-04 09:25:55,393 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2018-10-04 09:25:55,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:55,393 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-10-04 09:25:55,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 09:25:55,393 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-10-04 09:25:55,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-04 09:25:55,394 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:55,394 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1] [2018-10-04 09:25:55,394 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:55,394 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:55,395 INFO L82 PathProgramCache]: Analyzing trace with hash 2017095986, now seen corresponding path program 9 times [2018-10-04 09:25:55,395 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:55,395 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:55,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:55,396 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:25:55,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:55,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:55,607 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:55,608 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:55,608 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:55,616 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:25:55,664 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-04 09:25:55,664 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:25:55,666 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:55,888 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:55,908 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:55,908 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2018-10-04 09:25:55,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-04 09:25:55,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-04 09:25:55,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=276, Unknown=0, NotChecked=0, Total=462 [2018-10-04 09:25:55,910 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 22 states. [2018-10-04 09:25:56,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:56,175 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-04 09:25:56,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-04 09:25:56,176 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2018-10-04 09:25:56,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:56,177 INFO L225 Difference]: With dead ends: 25 [2018-10-04 09:25:56,177 INFO L226 Difference]: Without dead ends: 24 [2018-10-04 09:25:56,177 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=186, Invalid=276, Unknown=0, NotChecked=0, Total=462 [2018-10-04 09:25:56,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-04 09:25:56,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-04 09:25:56,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-04 09:25:56,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-10-04 09:25:56,187 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2018-10-04 09:25:56,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:56,187 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-10-04 09:25:56,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-04 09:25:56,188 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-10-04 09:25:56,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-04 09:25:56,188 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:56,189 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1] [2018-10-04 09:25:56,189 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:56,190 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:56,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1398993140, now seen corresponding path program 10 times [2018-10-04 09:25:56,190 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:56,190 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:56,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:56,191 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:25:56,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:56,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:56,504 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:56,505 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:56,505 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:56,515 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:25:56,531 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:25:56,531 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:25:56,533 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:56,756 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:56,776 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:56,776 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2018-10-04 09:25:56,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-04 09:25:56,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-04 09:25:56,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=331, Unknown=0, NotChecked=0, Total=552 [2018-10-04 09:25:56,778 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 24 states. [2018-10-04 09:25:56,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:56,838 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-04 09:25:56,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-04 09:25:56,839 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 23 [2018-10-04 09:25:56,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:56,840 INFO L225 Difference]: With dead ends: 27 [2018-10-04 09:25:56,840 INFO L226 Difference]: Without dead ends: 26 [2018-10-04 09:25:56,842 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=221, Invalid=331, Unknown=0, NotChecked=0, Total=552 [2018-10-04 09:25:56,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-04 09:25:56,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-10-04 09:25:56,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-04 09:25:56,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-10-04 09:25:56,846 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 23 [2018-10-04 09:25:56,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:56,847 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-10-04 09:25:56,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-04 09:25:56,847 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-10-04 09:25:56,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-04 09:25:56,848 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:56,848 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1] [2018-10-04 09:25:56,848 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:56,849 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:56,849 INFO L82 PathProgramCache]: Analyzing trace with hash 107644982, now seen corresponding path program 11 times [2018-10-04 09:25:56,849 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:56,849 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:56,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:56,850 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:25:56,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:56,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:57,026 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:57,027 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:57,027 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:57,034 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:25:57,055 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-04 09:25:57,055 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:25:57,057 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:57,539 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:57,559 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:57,560 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2018-10-04 09:25:57,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-04 09:25:57,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-04 09:25:57,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2018-10-04 09:25:57,562 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 26 states. [2018-10-04 09:25:57,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:57,678 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-04 09:25:57,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-04 09:25:57,679 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 25 [2018-10-04 09:25:57,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:57,679 INFO L225 Difference]: With dead ends: 29 [2018-10-04 09:25:57,680 INFO L226 Difference]: Without dead ends: 28 [2018-10-04 09:25:57,680 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2018-10-04 09:25:57,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-04 09:25:57,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-10-04 09:25:57,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 09:25:57,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-10-04 09:25:57,685 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 25 [2018-10-04 09:25:57,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:57,685 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-10-04 09:25:57,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-04 09:25:57,686 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-10-04 09:25:57,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-04 09:25:57,688 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:57,688 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1] [2018-10-04 09:25:57,689 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:57,689 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:57,689 INFO L82 PathProgramCache]: Analyzing trace with hash 367613688, now seen corresponding path program 12 times [2018-10-04 09:25:57,689 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:57,689 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:57,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:57,690 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:25:57,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:57,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:58,005 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:58,005 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:58,005 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:58,020 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:25:58,049 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-04 09:25:58,049 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:25:58,051 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:58,308 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:58,330 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:58,330 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 26 [2018-10-04 09:25:58,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-04 09:25:58,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-04 09:25:58,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=456, Unknown=0, NotChecked=0, Total=756 [2018-10-04 09:25:58,331 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 28 states. [2018-10-04 09:25:58,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:58,403 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-04 09:25:58,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-04 09:25:58,403 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 27 [2018-10-04 09:25:58,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:58,404 INFO L225 Difference]: With dead ends: 31 [2018-10-04 09:25:58,404 INFO L226 Difference]: Without dead ends: 30 [2018-10-04 09:25:58,405 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=300, Invalid=456, Unknown=0, NotChecked=0, Total=756 [2018-10-04 09:25:58,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-04 09:25:58,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-04 09:25:58,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:25:58,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-10-04 09:25:58,411 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 27 [2018-10-04 09:25:58,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:58,411 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-10-04 09:25:58,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-04 09:25:58,411 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-10-04 09:25:58,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-04 09:25:58,412 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:58,412 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1] [2018-10-04 09:25:58,412 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:58,413 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:58,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1089436986, now seen corresponding path program 13 times [2018-10-04 09:25:58,413 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:58,413 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:58,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:58,414 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:25:58,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:58,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:58,624 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:58,625 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:58,625 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:58,633 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:25:58,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:58,644 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:58,958 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:58,978 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:58,979 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2018-10-04 09:25:58,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-04 09:25:58,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-04 09:25:58,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=526, Unknown=0, NotChecked=0, Total=870 [2018-10-04 09:25:58,980 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 30 states. [2018-10-04 09:25:59,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:59,055 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-04 09:25:59,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-04 09:25:59,055 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 29 [2018-10-04 09:25:59,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:59,056 INFO L225 Difference]: With dead ends: 33 [2018-10-04 09:25:59,056 INFO L226 Difference]: Without dead ends: 32 [2018-10-04 09:25:59,057 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=344, Invalid=526, Unknown=0, NotChecked=0, Total=870 [2018-10-04 09:25:59,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-04 09:25:59,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-10-04 09:25:59,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:25:59,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-10-04 09:25:59,061 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 29 [2018-10-04 09:25:59,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:59,062 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-10-04 09:25:59,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-04 09:25:59,062 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-10-04 09:25:59,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-04 09:25:59,063 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:59,063 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1] [2018-10-04 09:25:59,063 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:59,063 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:59,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1023075588, now seen corresponding path program 14 times [2018-10-04 09:25:59,064 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:59,064 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:59,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:59,064 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:25:59,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:59,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:59,309 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:59,310 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:59,310 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:59,321 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:25:59,333 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:25:59,333 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:25:59,335 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:59,581 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:59,601 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:59,602 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2018-10-04 09:25:59,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-04 09:25:59,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-04 09:25:59,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=601, Unknown=0, NotChecked=0, Total=992 [2018-10-04 09:25:59,603 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 32 states. [2018-10-04 09:25:59,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:59,706 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-10-04 09:25:59,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-04 09:25:59,707 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 31 [2018-10-04 09:25:59,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:59,708 INFO L225 Difference]: With dead ends: 35 [2018-10-04 09:25:59,708 INFO L226 Difference]: Without dead ends: 34 [2018-10-04 09:25:59,709 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=391, Invalid=601, Unknown=0, NotChecked=0, Total=992 [2018-10-04 09:25:59,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-04 09:25:59,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-10-04 09:25:59,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:25:59,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-10-04 09:25:59,714 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 31 [2018-10-04 09:25:59,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:59,715 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-10-04 09:25:59,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-04 09:25:59,715 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-10-04 09:25:59,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-04 09:25:59,716 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:59,716 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1] [2018-10-04 09:25:59,716 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:59,717 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:59,717 INFO L82 PathProgramCache]: Analyzing trace with hash 371871806, now seen corresponding path program 15 times [2018-10-04 09:25:59,717 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:59,717 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:59,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:59,718 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:25:59,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:59,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:59,938 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:59,939 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:59,939 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:59,948 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:26:00,133 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-04 09:26:00,133 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:00,140 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:00,639 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:00,660 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:00,660 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 32 [2018-10-04 09:26:00,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-04 09:26:00,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-04 09:26:00,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=681, Unknown=0, NotChecked=0, Total=1122 [2018-10-04 09:26:00,662 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 34 states. [2018-10-04 09:26:00,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:00,836 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-04 09:26:00,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-04 09:26:00,837 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 33 [2018-10-04 09:26:00,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:00,838 INFO L225 Difference]: With dead ends: 37 [2018-10-04 09:26:00,838 INFO L226 Difference]: Without dead ends: 36 [2018-10-04 09:26:00,839 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=441, Invalid=681, Unknown=0, NotChecked=0, Total=1122 [2018-10-04 09:26:00,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-04 09:26:00,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-10-04 09:26:00,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-04 09:26:00,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-10-04 09:26:00,844 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 33 [2018-10-04 09:26:00,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:00,845 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-10-04 09:26:00,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-04 09:26:00,845 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-10-04 09:26:00,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-04 09:26:00,845 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:00,846 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1] [2018-10-04 09:26:00,846 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:00,846 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:00,846 INFO L82 PathProgramCache]: Analyzing trace with hash 886521088, now seen corresponding path program 16 times [2018-10-04 09:26:00,846 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:00,846 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:00,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:00,847 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:00,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:00,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:01,107 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:01,108 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:01,108 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:01,116 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:26:01,126 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:26:01,126 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:01,128 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:01,401 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:01,421 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:01,421 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 34 [2018-10-04 09:26:01,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-04 09:26:01,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-04 09:26:01,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=494, Invalid=766, Unknown=0, NotChecked=0, Total=1260 [2018-10-04 09:26:01,423 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 36 states. [2018-10-04 09:26:01,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:01,497 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-04 09:26:01,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-04 09:26:01,498 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 35 [2018-10-04 09:26:01,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:01,499 INFO L225 Difference]: With dead ends: 39 [2018-10-04 09:26:01,499 INFO L226 Difference]: Without dead ends: 38 [2018-10-04 09:26:01,500 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=494, Invalid=766, Unknown=0, NotChecked=0, Total=1260 [2018-10-04 09:26:01,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-04 09:26:01,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-10-04 09:26:01,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-04 09:26:01,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-10-04 09:26:01,505 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 35 [2018-10-04 09:26:01,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:01,505 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-10-04 09:26:01,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-04 09:26:01,505 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-10-04 09:26:01,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-04 09:26:01,506 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:01,506 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1] [2018-10-04 09:26:01,506 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:01,506 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:01,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1543242050, now seen corresponding path program 17 times [2018-10-04 09:26:01,507 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:01,507 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:01,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:01,507 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:01,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:01,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:01,906 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:01,906 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:01,907 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:01,914 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:26:01,931 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-04 09:26:01,931 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:01,932 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:02,382 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:02,402 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:02,402 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 36 [2018-10-04 09:26:02,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-04 09:26:02,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-04 09:26:02,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=550, Invalid=856, Unknown=0, NotChecked=0, Total=1406 [2018-10-04 09:26:02,404 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 38 states. [2018-10-04 09:26:02,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:02,727 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-10-04 09:26:02,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-04 09:26:02,728 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 37 [2018-10-04 09:26:02,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:02,729 INFO L225 Difference]: With dead ends: 41 [2018-10-04 09:26:02,729 INFO L226 Difference]: Without dead ends: 40 [2018-10-04 09:26:02,730 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=550, Invalid=856, Unknown=0, NotChecked=0, Total=1406 [2018-10-04 09:26:02,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-04 09:26:02,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-10-04 09:26:02,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-04 09:26:02,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-10-04 09:26:02,735 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 37 [2018-10-04 09:26:02,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:02,735 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-10-04 09:26:02,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-04 09:26:02,735 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-10-04 09:26:02,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-04 09:26:02,736 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:02,736 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1] [2018-10-04 09:26:02,737 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:02,737 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:02,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1291894020, now seen corresponding path program 18 times [2018-10-04 09:26:02,737 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:02,737 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:02,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:02,738 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:02,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:02,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:03,069 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:03,070 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:03,070 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:03,077 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:26:03,094 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-04 09:26:03,094 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:03,096 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:03,991 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:04,011 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:04,011 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 38 [2018-10-04 09:26:04,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-04 09:26:04,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-04 09:26:04,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=609, Invalid=951, Unknown=0, NotChecked=0, Total=1560 [2018-10-04 09:26:04,012 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 40 states. [2018-10-04 09:26:04,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:04,099 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-04 09:26:04,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-04 09:26:04,099 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 39 [2018-10-04 09:26:04,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:04,100 INFO L225 Difference]: With dead ends: 43 [2018-10-04 09:26:04,100 INFO L226 Difference]: Without dead ends: 42 [2018-10-04 09:26:04,102 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=609, Invalid=951, Unknown=0, NotChecked=0, Total=1560 [2018-10-04 09:26:04,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-04 09:26:04,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-10-04 09:26:04,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-04 09:26:04,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-10-04 09:26:04,106 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 39 [2018-10-04 09:26:04,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:04,106 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-10-04 09:26:04,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-04 09:26:04,107 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-10-04 09:26:04,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-04 09:26:04,107 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:04,107 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1] [2018-10-04 09:26:04,107 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:04,107 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:04,108 INFO L82 PathProgramCache]: Analyzing trace with hash 264605766, now seen corresponding path program 19 times [2018-10-04 09:26:04,108 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:04,108 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:04,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:04,109 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:04,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:04,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:04,453 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:04,453 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:04,453 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:04,461 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:26:04,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:04,478 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:05,231 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:05,251 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:05,251 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 40 [2018-10-04 09:26:05,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-04 09:26:05,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-04 09:26:05,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=1051, Unknown=0, NotChecked=0, Total=1722 [2018-10-04 09:26:05,252 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 42 states. [2018-10-04 09:26:05,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:05,389 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-10-04 09:26:05,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-04 09:26:05,390 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 41 [2018-10-04 09:26:05,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:05,390 INFO L225 Difference]: With dead ends: 45 [2018-10-04 09:26:05,391 INFO L226 Difference]: Without dead ends: 44 [2018-10-04 09:26:05,392 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=671, Invalid=1051, Unknown=0, NotChecked=0, Total=1722 [2018-10-04 09:26:05,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-04 09:26:05,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-10-04 09:26:05,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-04 09:26:05,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-10-04 09:26:05,397 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 41 [2018-10-04 09:26:05,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:05,397 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-10-04 09:26:05,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-04 09:26:05,397 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-10-04 09:26:05,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-04 09:26:05,398 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:05,398 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1] [2018-10-04 09:26:05,398 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:05,398 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:05,399 INFO L82 PathProgramCache]: Analyzing trace with hash 883071752, now seen corresponding path program 20 times [2018-10-04 09:26:05,399 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:05,399 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:05,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:05,400 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:26:05,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:05,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:06,439 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:06,440 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:06,440 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:06,447 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:26:06,465 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:26:06,465 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:06,467 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:06,783 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:06,804 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:06,805 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 42 [2018-10-04 09:26:06,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-04 09:26:06,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-04 09:26:06,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=736, Invalid=1156, Unknown=0, NotChecked=0, Total=1892 [2018-10-04 09:26:06,806 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 44 states. [2018-10-04 09:26:06,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:06,908 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-10-04 09:26:06,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-04 09:26:06,909 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 43 [2018-10-04 09:26:06,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:06,909 INFO L225 Difference]: With dead ends: 47 [2018-10-04 09:26:06,910 INFO L226 Difference]: Without dead ends: 46 [2018-10-04 09:26:06,911 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=736, Invalid=1156, Unknown=0, NotChecked=0, Total=1892 [2018-10-04 09:26:06,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-04 09:26:06,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-10-04 09:26:06,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-04 09:26:06,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-10-04 09:26:06,916 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 43 [2018-10-04 09:26:06,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:06,916 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-10-04 09:26:06,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-04 09:26:06,916 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-10-04 09:26:06,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-10-04 09:26:06,917 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:06,917 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1] [2018-10-04 09:26:06,918 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:06,918 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:06,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1771569846, now seen corresponding path program 21 times [2018-10-04 09:26:06,918 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:06,918 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:06,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:06,919 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:06,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:06,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:07,850 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:07,850 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:07,850 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:07,858 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:26:07,877 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-10-04 09:26:07,877 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:07,879 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:08,726 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:08,746 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:08,746 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 44 [2018-10-04 09:26:08,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-04 09:26:08,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-04 09:26:08,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=804, Invalid=1266, Unknown=0, NotChecked=0, Total=2070 [2018-10-04 09:26:08,748 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 46 states. [2018-10-04 09:26:08,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:08,899 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-04 09:26:08,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-04 09:26:08,901 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 45 [2018-10-04 09:26:08,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:08,902 INFO L225 Difference]: With dead ends: 49 [2018-10-04 09:26:08,902 INFO L226 Difference]: Without dead ends: 48 [2018-10-04 09:26:08,903 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=804, Invalid=1266, Unknown=0, NotChecked=0, Total=2070 [2018-10-04 09:26:08,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-04 09:26:08,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-10-04 09:26:08,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-04 09:26:08,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-10-04 09:26:08,906 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 45 [2018-10-04 09:26:08,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:08,907 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-10-04 09:26:08,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-04 09:26:08,907 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-10-04 09:26:08,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-04 09:26:08,908 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:08,908 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1] [2018-10-04 09:26:08,908 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:08,908 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:08,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1671571700, now seen corresponding path program 22 times [2018-10-04 09:26:08,908 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:08,908 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:08,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:08,909 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:08,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:08,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:09,405 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:09,405 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:09,405 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:09,418 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:26:09,430 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:26:09,430 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:09,433 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:09,939 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:09,960 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:09,960 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2018-10-04 09:26:09,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-04 09:26:09,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-04 09:26:09,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=875, Invalid=1381, Unknown=0, NotChecked=0, Total=2256 [2018-10-04 09:26:09,962 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 48 states. [2018-10-04 09:26:10,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:10,057 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-10-04 09:26:10,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-04 09:26:10,057 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 47 [2018-10-04 09:26:10,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:10,058 INFO L225 Difference]: With dead ends: 51 [2018-10-04 09:26:10,059 INFO L226 Difference]: Without dead ends: 50 [2018-10-04 09:26:10,060 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=875, Invalid=1381, Unknown=0, NotChecked=0, Total=2256 [2018-10-04 09:26:10,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-04 09:26:10,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-10-04 09:26:10,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-04 09:26:10,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-10-04 09:26:10,065 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 47 [2018-10-04 09:26:10,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:10,066 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-10-04 09:26:10,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-04 09:26:10,066 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-10-04 09:26:10,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-04 09:26:10,067 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:10,067 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1] [2018-10-04 09:26:10,067 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:10,068 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:10,068 INFO L82 PathProgramCache]: Analyzing trace with hash -62633906, now seen corresponding path program 23 times [2018-10-04 09:26:10,068 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:10,068 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:10,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:10,069 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:10,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:10,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:11,157 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:11,158 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:11,158 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:11,165 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:26:11,188 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-10-04 09:26:11,189 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:11,190 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:11,666 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:11,686 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:11,686 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 48 [2018-10-04 09:26:11,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-04 09:26:11,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-04 09:26:11,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=949, Invalid=1501, Unknown=0, NotChecked=0, Total=2450 [2018-10-04 09:26:11,688 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 50 states. [2018-10-04 09:26:11,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:11,812 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-10-04 09:26:11,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-04 09:26:11,813 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 49 [2018-10-04 09:26:11,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:11,814 INFO L225 Difference]: With dead ends: 53 [2018-10-04 09:26:11,814 INFO L226 Difference]: Without dead ends: 52 [2018-10-04 09:26:11,815 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=949, Invalid=1501, Unknown=0, NotChecked=0, Total=2450 [2018-10-04 09:26:11,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-10-04 09:26:11,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-10-04 09:26:11,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-04 09:26:11,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-10-04 09:26:11,820 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 49 [2018-10-04 09:26:11,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:11,820 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-10-04 09:26:11,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-04 09:26:11,820 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-10-04 09:26:11,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-04 09:26:11,821 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:11,821 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1] [2018-10-04 09:26:11,821 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:11,821 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:11,822 INFO L82 PathProgramCache]: Analyzing trace with hash -61640432, now seen corresponding path program 24 times [2018-10-04 09:26:11,822 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:11,822 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:11,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:11,823 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:11,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:11,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:12,200 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:12,201 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:12,201 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:12,208 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:26:12,233 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-04 09:26:12,234 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:12,236 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:12,683 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:12,703 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:12,703 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 50 [2018-10-04 09:26:12,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-04 09:26:12,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-04 09:26:12,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1026, Invalid=1626, Unknown=0, NotChecked=0, Total=2652 [2018-10-04 09:26:12,704 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 52 states. [2018-10-04 09:26:12,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:12,851 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-10-04 09:26:12,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-04 09:26:12,852 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 51 [2018-10-04 09:26:12,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:12,852 INFO L225 Difference]: With dead ends: 55 [2018-10-04 09:26:12,853 INFO L226 Difference]: Without dead ends: 54 [2018-10-04 09:26:12,854 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1026, Invalid=1626, Unknown=0, NotChecked=0, Total=2652 [2018-10-04 09:26:12,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-04 09:26:12,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-10-04 09:26:12,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-04 09:26:12,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-10-04 09:26:12,858 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 51 [2018-10-04 09:26:12,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:12,858 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-10-04 09:26:12,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-04 09:26:12,858 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-10-04 09:26:12,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-04 09:26:12,859 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:12,859 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1] [2018-10-04 09:26:12,859 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:12,859 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:12,859 INFO L82 PathProgramCache]: Analyzing trace with hash 893088082, now seen corresponding path program 25 times [2018-10-04 09:26:12,859 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:12,860 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:12,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:12,860 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:12,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:12,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:13,347 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:13,347 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:13,347 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:13,355 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:26:13,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:13,367 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:13,788 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:13,807 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:13,808 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 52 [2018-10-04 09:26:13,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-04 09:26:13,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-04 09:26:13,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1106, Invalid=1756, Unknown=0, NotChecked=0, Total=2862 [2018-10-04 09:26:13,809 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 54 states. [2018-10-04 09:26:13,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:13,946 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-10-04 09:26:13,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-04 09:26:13,947 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 53 [2018-10-04 09:26:13,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:13,948 INFO L225 Difference]: With dead ends: 57 [2018-10-04 09:26:13,948 INFO L226 Difference]: Without dead ends: 56 [2018-10-04 09:26:13,949 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1300 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1106, Invalid=1756, Unknown=0, NotChecked=0, Total=2862 [2018-10-04 09:26:13,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-04 09:26:13,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-10-04 09:26:13,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-04 09:26:13,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-10-04 09:26:13,956 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 53 [2018-10-04 09:26:13,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:13,956 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-10-04 09:26:13,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-04 09:26:13,956 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-10-04 09:26:13,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-04 09:26:13,957 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:13,957 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1] [2018-10-04 09:26:13,957 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:13,957 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:13,958 INFO L82 PathProgramCache]: Analyzing trace with hash -735811308, now seen corresponding path program 26 times [2018-10-04 09:26:13,958 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:13,958 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:13,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:13,959 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:26:13,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:13,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:14,357 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:14,358 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:14,358 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:14,367 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:26:14,381 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:26:14,381 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:14,383 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:14,853 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:14,874 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:14,875 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 54 [2018-10-04 09:26:14,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-04 09:26:14,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-04 09:26:14,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1189, Invalid=1891, Unknown=0, NotChecked=0, Total=3080 [2018-10-04 09:26:14,877 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 56 states. [2018-10-04 09:26:15,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:15,002 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-10-04 09:26:15,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-04 09:26:15,003 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 55 [2018-10-04 09:26:15,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:15,004 INFO L225 Difference]: With dead ends: 59 [2018-10-04 09:26:15,004 INFO L226 Difference]: Without dead ends: 58 [2018-10-04 09:26:15,006 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1404 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1189, Invalid=1891, Unknown=0, NotChecked=0, Total=3080 [2018-10-04 09:26:15,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-10-04 09:26:15,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-10-04 09:26:15,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-04 09:26:15,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-10-04 09:26:15,009 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 55 [2018-10-04 09:26:15,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:15,010 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-10-04 09:26:15,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-04 09:26:15,010 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-10-04 09:26:15,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-04 09:26:15,010 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:15,010 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1] [2018-10-04 09:26:15,011 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:15,011 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:15,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1554937942, now seen corresponding path program 27 times [2018-10-04 09:26:15,011 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:15,011 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:15,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:15,012 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:15,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:15,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:15,781 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:15,782 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:15,782 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:15,800 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:26:15,826 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-10-04 09:26:15,826 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:15,828 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:16,576 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:16,596 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:16,596 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 56 [2018-10-04 09:26:16,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-04 09:26:16,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-04 09:26:16,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=2031, Unknown=0, NotChecked=0, Total=3306 [2018-10-04 09:26:16,598 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 58 states. [2018-10-04 09:26:16,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:16,706 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-10-04 09:26:16,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-04 09:26:16,707 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 57 [2018-10-04 09:26:16,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:16,708 INFO L225 Difference]: With dead ends: 61 [2018-10-04 09:26:16,708 INFO L226 Difference]: Without dead ends: 60 [2018-10-04 09:26:16,709 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1512 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1275, Invalid=2031, Unknown=0, NotChecked=0, Total=3306 [2018-10-04 09:26:16,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-04 09:26:16,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-10-04 09:26:16,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-04 09:26:16,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-10-04 09:26:16,712 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 57 [2018-10-04 09:26:16,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:16,712 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-10-04 09:26:16,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-04 09:26:16,713 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-10-04 09:26:16,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-10-04 09:26:16,713 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:16,713 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1] [2018-10-04 09:26:16,713 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:16,714 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:16,714 INFO L82 PathProgramCache]: Analyzing trace with hash -353255656, now seen corresponding path program 28 times [2018-10-04 09:26:16,714 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:16,714 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:16,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:16,715 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:16,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:16,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:17,185 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:17,185 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:17,185 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:17,202 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:26:17,236 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:26:17,237 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:17,239 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:18,355 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:18,376 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:18,377 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 58 [2018-10-04 09:26:18,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-04 09:26:18,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-04 09:26:18,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1364, Invalid=2176, Unknown=0, NotChecked=0, Total=3540 [2018-10-04 09:26:18,378 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 60 states. [2018-10-04 09:26:18,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:18,666 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-10-04 09:26:18,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-04 09:26:18,667 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 59 [2018-10-04 09:26:18,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:18,668 INFO L225 Difference]: With dead ends: 63 [2018-10-04 09:26:18,668 INFO L226 Difference]: Without dead ends: 62 [2018-10-04 09:26:18,669 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1624 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1364, Invalid=2176, Unknown=0, NotChecked=0, Total=3540 [2018-10-04 09:26:18,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-10-04 09:26:18,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-10-04 09:26:18,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-04 09:26:18,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-10-04 09:26:18,673 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 59 [2018-10-04 09:26:18,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:18,674 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-10-04 09:26:18,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-04 09:26:18,674 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-10-04 09:26:18,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-04 09:26:18,674 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:18,674 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1] [2018-10-04 09:26:18,675 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:18,675 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:18,675 INFO L82 PathProgramCache]: Analyzing trace with hash -176267942, now seen corresponding path program 29 times [2018-10-04 09:26:18,675 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:18,675 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:18,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:18,676 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:18,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:18,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:19,198 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:19,199 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:19,199 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:19,206 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:26:19,233 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-10-04 09:26:19,233 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:19,235 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:19,815 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:19,835 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:19,836 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 60 [2018-10-04 09:26:19,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-04 09:26:19,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-04 09:26:19,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1456, Invalid=2326, Unknown=0, NotChecked=0, Total=3782 [2018-10-04 09:26:19,837 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 62 states. [2018-10-04 09:26:19,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:19,993 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-10-04 09:26:19,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-04 09:26:19,994 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 61 [2018-10-04 09:26:19,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:19,995 INFO L225 Difference]: With dead ends: 65 [2018-10-04 09:26:19,995 INFO L226 Difference]: Without dead ends: 64 [2018-10-04 09:26:19,996 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1740 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1456, Invalid=2326, Unknown=0, NotChecked=0, Total=3782 [2018-10-04 09:26:19,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-10-04 09:26:19,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-10-04 09:26:20,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-04 09:26:20,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-10-04 09:26:20,000 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 61 [2018-10-04 09:26:20,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:20,000 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-10-04 09:26:20,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-04 09:26:20,001 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-10-04 09:26:20,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-04 09:26:20,001 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:20,001 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1] [2018-10-04 09:26:20,001 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:20,001 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:20,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1889766628, now seen corresponding path program 30 times [2018-10-04 09:26:20,002 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:20,002 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:20,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:20,002 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:20,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:20,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:20,522 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:20,522 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:20,522 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:20,531 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:26:20,561 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-04 09:26:20,562 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:20,563 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:21,461 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:21,481 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:21,481 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 62 [2018-10-04 09:26:21,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-04 09:26:21,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-04 09:26:21,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1551, Invalid=2481, Unknown=0, NotChecked=0, Total=4032 [2018-10-04 09:26:21,482 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 64 states. [2018-10-04 09:26:21,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:21,594 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-10-04 09:26:21,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-04 09:26:21,594 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 63 [2018-10-04 09:26:21,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:21,595 INFO L225 Difference]: With dead ends: 67 [2018-10-04 09:26:21,595 INFO L226 Difference]: Without dead ends: 66 [2018-10-04 09:26:21,596 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1860 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1551, Invalid=2481, Unknown=0, NotChecked=0, Total=4032 [2018-10-04 09:26:21,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-04 09:26:21,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-10-04 09:26:21,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-04 09:26:21,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-10-04 09:26:21,600 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 63 [2018-10-04 09:26:21,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:21,600 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-10-04 09:26:21,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-04 09:26:21,600 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-10-04 09:26:21,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-04 09:26:21,601 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:21,601 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1] [2018-10-04 09:26:21,601 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:21,601 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:21,602 INFO L82 PathProgramCache]: Analyzing trace with hash 705437790, now seen corresponding path program 31 times [2018-10-04 09:26:21,602 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:21,602 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:21,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:21,603 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:21,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:21,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:22,153 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:22,153 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:22,153 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:22,161 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:26:22,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:22,178 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:22,793 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:22,813 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:22,813 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 64 [2018-10-04 09:26:22,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-04 09:26:22,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-04 09:26:22,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1649, Invalid=2641, Unknown=0, NotChecked=0, Total=4290 [2018-10-04 09:26:22,815 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 66 states. [2018-10-04 09:26:22,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:22,968 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-10-04 09:26:22,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-04 09:26:22,968 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 65 [2018-10-04 09:26:22,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:22,969 INFO L225 Difference]: With dead ends: 69 [2018-10-04 09:26:22,969 INFO L226 Difference]: Without dead ends: 68 [2018-10-04 09:26:22,971 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1984 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1649, Invalid=2641, Unknown=0, NotChecked=0, Total=4290 [2018-10-04 09:26:22,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-04 09:26:22,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-10-04 09:26:22,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-04 09:26:22,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-10-04 09:26:22,975 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 65 [2018-10-04 09:26:22,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:22,975 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-10-04 09:26:22,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-04 09:26:22,975 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-10-04 09:26:22,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-04 09:26:22,976 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:22,976 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1] [2018-10-04 09:26:22,976 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:22,976 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:22,977 INFO L82 PathProgramCache]: Analyzing trace with hash -679115488, now seen corresponding path program 32 times [2018-10-04 09:26:22,977 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:22,977 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:22,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:22,978 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:26:22,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:22,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:23,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:23,860 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:23,860 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:23,867 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:26:23,884 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:26:23,885 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:23,886 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:24,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:24,615 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:24,615 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 66 [2018-10-04 09:26:24,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-04 09:26:24,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-04 09:26:24,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1750, Invalid=2806, Unknown=0, NotChecked=0, Total=4556 [2018-10-04 09:26:24,617 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 68 states. [2018-10-04 09:26:24,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:24,745 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-10-04 09:26:24,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-04 09:26:24,745 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 67 [2018-10-04 09:26:24,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:24,746 INFO L225 Difference]: With dead ends: 71 [2018-10-04 09:26:24,746 INFO L226 Difference]: Without dead ends: 70 [2018-10-04 09:26:24,747 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2112 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1750, Invalid=2806, Unknown=0, NotChecked=0, Total=4556 [2018-10-04 09:26:24,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-10-04 09:26:24,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-10-04 09:26:24,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-04 09:26:24,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-10-04 09:26:24,751 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 67 [2018-10-04 09:26:24,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:24,751 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-10-04 09:26:24,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-04 09:26:24,752 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-10-04 09:26:24,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-10-04 09:26:24,752 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:24,752 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1] [2018-10-04 09:26:24,753 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:24,753 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:24,753 INFO L82 PathProgramCache]: Analyzing trace with hash 205046114, now seen corresponding path program 33 times [2018-10-04 09:26:24,753 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:24,753 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:24,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:24,754 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:24,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:24,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:25,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:25,357 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:25,357 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:25,364 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:26:25,394 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-10-04 09:26:25,395 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:25,396 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:26,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:26,249 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:26,249 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 68 [2018-10-04 09:26:26,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-04 09:26:26,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-04 09:26:26,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1854, Invalid=2976, Unknown=0, NotChecked=0, Total=4830 [2018-10-04 09:26:26,251 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 70 states. [2018-10-04 09:26:26,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:26,486 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-10-04 09:26:26,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-04 09:26:26,487 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 69 [2018-10-04 09:26:26,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:26,488 INFO L225 Difference]: With dead ends: 73 [2018-10-04 09:26:26,488 INFO L226 Difference]: Without dead ends: 72 [2018-10-04 09:26:26,489 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2244 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1854, Invalid=2976, Unknown=0, NotChecked=0, Total=4830 [2018-10-04 09:26:26,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-10-04 09:26:26,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-10-04 09:26:26,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-10-04 09:26:26,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-10-04 09:26:26,492 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 69 [2018-10-04 09:26:26,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:26,493 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-10-04 09:26:26,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-04 09:26:26,493 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-10-04 09:26:26,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-10-04 09:26:26,493 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:26,493 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1] [2018-10-04 09:26:26,494 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:26,494 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:26,494 INFO L82 PathProgramCache]: Analyzing trace with hash -519178972, now seen corresponding path program 34 times [2018-10-04 09:26:26,494 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:26,494 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:26,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:26,495 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:26,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:26,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:27,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:27,215 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:27,215 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:27,223 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:26:27,244 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:26:27,244 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:27,246 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:27,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:27,996 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:27,997 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 70 [2018-10-04 09:26:27,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-04 09:26:27,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-04 09:26:27,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1961, Invalid=3151, Unknown=0, NotChecked=0, Total=5112 [2018-10-04 09:26:27,998 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 72 states. [2018-10-04 09:26:28,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:28,210 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-10-04 09:26:28,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-04 09:26:28,210 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 71 [2018-10-04 09:26:28,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:28,211 INFO L225 Difference]: With dead ends: 75 [2018-10-04 09:26:28,212 INFO L226 Difference]: Without dead ends: 74 [2018-10-04 09:26:28,212 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2380 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1961, Invalid=3151, Unknown=0, NotChecked=0, Total=5112 [2018-10-04 09:26:28,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-04 09:26:28,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-10-04 09:26:28,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-10-04 09:26:28,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-10-04 09:26:28,216 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 71 [2018-10-04 09:26:28,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:28,217 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-10-04 09:26:28,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-04 09:26:28,217 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-10-04 09:26:28,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-10-04 09:26:28,217 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:28,218 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1] [2018-10-04 09:26:28,218 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:28,218 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:28,218 INFO L82 PathProgramCache]: Analyzing trace with hash -714784666, now seen corresponding path program 35 times [2018-10-04 09:26:28,218 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:28,218 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:28,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:28,219 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:28,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:28,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:28,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:28,844 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:28,844 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:28,851 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:26:28,882 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-10-04 09:26:28,883 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:28,885 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:29,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:29,690 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:29,690 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 72 [2018-10-04 09:26:29,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-04 09:26:29,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-04 09:26:29,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2071, Invalid=3331, Unknown=0, NotChecked=0, Total=5402 [2018-10-04 09:26:29,692 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 74 states. [2018-10-04 09:26:30,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:30,010 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-10-04 09:26:30,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-04 09:26:30,011 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 73 [2018-10-04 09:26:30,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:30,012 INFO L225 Difference]: With dead ends: 77 [2018-10-04 09:26:30,012 INFO L226 Difference]: Without dead ends: 76 [2018-10-04 09:26:30,012 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2520 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2071, Invalid=3331, Unknown=0, NotChecked=0, Total=5402 [2018-10-04 09:26:30,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-10-04 09:26:30,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-10-04 09:26:30,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-04 09:26:30,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-10-04 09:26:30,016 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 73 [2018-10-04 09:26:30,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:30,016 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-10-04 09:26:30,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-04 09:26:30,016 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-10-04 09:26:30,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-10-04 09:26:30,016 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:30,016 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1] [2018-10-04 09:26:30,016 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:30,017 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:30,017 INFO L82 PathProgramCache]: Analyzing trace with hash 286704424, now seen corresponding path program 36 times [2018-10-04 09:26:30,017 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:30,017 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:30,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:30,017 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:30,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:30,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:30,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:30,831 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:30,832 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:30,840 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:26:30,880 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-04 09:26:30,880 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:30,882 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:32,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:32,044 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:32,044 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 74 [2018-10-04 09:26:32,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-04 09:26:32,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-04 09:26:32,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2184, Invalid=3516, Unknown=0, NotChecked=0, Total=5700 [2018-10-04 09:26:32,045 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 76 states. [2018-10-04 09:26:32,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:32,216 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-10-04 09:26:32,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-04 09:26:32,216 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 75 [2018-10-04 09:26:32,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:32,217 INFO L225 Difference]: With dead ends: 79 [2018-10-04 09:26:32,218 INFO L226 Difference]: Without dead ends: 78 [2018-10-04 09:26:32,218 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2664 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2184, Invalid=3516, Unknown=0, NotChecked=0, Total=5700 [2018-10-04 09:26:32,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-10-04 09:26:32,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-10-04 09:26:32,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-10-04 09:26:32,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-10-04 09:26:32,221 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 75 [2018-10-04 09:26:32,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:32,221 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-10-04 09:26:32,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-04 09:26:32,222 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-10-04 09:26:32,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-10-04 09:26:32,222 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:32,222 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1] [2018-10-04 09:26:32,222 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:32,223 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:32,223 INFO L82 PathProgramCache]: Analyzing trace with hash 645045610, now seen corresponding path program 37 times [2018-10-04 09:26:32,223 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:32,223 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:32,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:32,224 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:32,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:32,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:33,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:33,250 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:33,250 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:33,256 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:26:33,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:33,278 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:34,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:34,128 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:34,129 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 76 [2018-10-04 09:26:34,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-04 09:26:34,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-04 09:26:34,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2300, Invalid=3706, Unknown=0, NotChecked=0, Total=6006 [2018-10-04 09:26:34,130 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 78 states. [2018-10-04 09:26:34,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:34,290 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-10-04 09:26:34,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-04 09:26:34,291 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 77 [2018-10-04 09:26:34,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:34,292 INFO L225 Difference]: With dead ends: 81 [2018-10-04 09:26:34,292 INFO L226 Difference]: Without dead ends: 80 [2018-10-04 09:26:34,293 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2812 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2300, Invalid=3706, Unknown=0, NotChecked=0, Total=6006 [2018-10-04 09:26:34,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-10-04 09:26:34,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-10-04 09:26:34,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-04 09:26:34,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-10-04 09:26:34,297 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 77 [2018-10-04 09:26:34,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:34,297 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-10-04 09:26:34,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-04 09:26:34,297 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-10-04 09:26:34,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-04 09:26:34,298 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:34,298 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1] [2018-10-04 09:26:34,298 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:34,298 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:34,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1413541676, now seen corresponding path program 38 times [2018-10-04 09:26:34,298 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:34,299 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:34,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:34,299 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:26:34,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:34,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:35,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:35,672 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:35,672 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:35,680 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:26:35,700 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:26:35,701 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:35,703 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:36,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:36,919 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:36,919 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 78 [2018-10-04 09:26:36,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-04 09:26:36,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-04 09:26:36,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2419, Invalid=3901, Unknown=0, NotChecked=0, Total=6320 [2018-10-04 09:26:36,921 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 80 states. [2018-10-04 09:26:37,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:37,080 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-10-04 09:26:37,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-04 09:26:37,080 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 79 [2018-10-04 09:26:37,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:37,081 INFO L225 Difference]: With dead ends: 83 [2018-10-04 09:26:37,081 INFO L226 Difference]: Without dead ends: 82 [2018-10-04 09:26:37,082 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2964 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2419, Invalid=3901, Unknown=0, NotChecked=0, Total=6320 [2018-10-04 09:26:37,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-10-04 09:26:37,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-10-04 09:26:37,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-10-04 09:26:37,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-10-04 09:26:37,086 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 79 [2018-10-04 09:26:37,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:37,086 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-10-04 09:26:37,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-04 09:26:37,086 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-10-04 09:26:37,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-10-04 09:26:37,086 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:37,087 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1] [2018-10-04 09:26:37,087 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:37,087 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:37,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1203886190, now seen corresponding path program 39 times [2018-10-04 09:26:37,087 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:37,087 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:37,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:37,088 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:37,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:37,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:38,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:38,122 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:38,122 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:38,130 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:26:38,169 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-10-04 09:26:38,169 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:38,171 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:39,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:39,170 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:39,171 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 80 [2018-10-04 09:26:39,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-04 09:26:39,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-04 09:26:39,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2541, Invalid=4101, Unknown=0, NotChecked=0, Total=6642 [2018-10-04 09:26:39,172 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 82 states. [2018-10-04 09:26:39,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:39,348 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-10-04 09:26:39,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-04 09:26:39,349 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 81 [2018-10-04 09:26:39,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:39,350 INFO L225 Difference]: With dead ends: 85 [2018-10-04 09:26:39,350 INFO L226 Difference]: Without dead ends: 84 [2018-10-04 09:26:39,351 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3120 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2541, Invalid=4101, Unknown=0, NotChecked=0, Total=6642 [2018-10-04 09:26:39,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-10-04 09:26:39,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-10-04 09:26:39,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-10-04 09:26:39,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-10-04 09:26:39,354 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 81 [2018-10-04 09:26:39,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:39,355 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-10-04 09:26:39,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-04 09:26:39,355 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-10-04 09:26:39,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-04 09:26:39,355 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:39,355 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1] [2018-10-04 09:26:39,356 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:39,356 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:39,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1588427056, now seen corresponding path program 40 times [2018-10-04 09:26:39,356 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:39,356 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:39,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:39,357 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:39,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:39,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:40,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:40,158 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:40,159 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:40,167 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:26:40,190 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:26:40,191 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:40,193 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:41,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:41,199 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:41,199 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 82 [2018-10-04 09:26:41,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-04 09:26:41,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-04 09:26:41,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2666, Invalid=4306, Unknown=0, NotChecked=0, Total=6972 [2018-10-04 09:26:41,200 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 84 states. [2018-10-04 09:26:41,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:41,366 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-10-04 09:26:41,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-04 09:26:41,366 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 83 [2018-10-04 09:26:41,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:41,367 INFO L225 Difference]: With dead ends: 87 [2018-10-04 09:26:41,367 INFO L226 Difference]: Without dead ends: 86 [2018-10-04 09:26:41,368 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3280 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2666, Invalid=4306, Unknown=0, NotChecked=0, Total=6972 [2018-10-04 09:26:41,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-04 09:26:41,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-10-04 09:26:41,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-04 09:26:41,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-10-04 09:26:41,372 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 83 [2018-10-04 09:26:41,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:41,373 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-10-04 09:26:41,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-04 09:26:41,373 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-10-04 09:26:41,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-10-04 09:26:41,373 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:41,374 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1] [2018-10-04 09:26:41,374 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:41,374 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:41,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1765011826, now seen corresponding path program 41 times [2018-10-04 09:26:41,374 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:41,374 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:41,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:41,375 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:41,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:41,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:42,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:42,513 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:42,514 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:42,523 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:26:42,563 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-10-04 09:26:42,563 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:42,565 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:43,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:43,703 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:43,703 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 84 [2018-10-04 09:26:43,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-04 09:26:43,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-04 09:26:43,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2794, Invalid=4516, Unknown=0, NotChecked=0, Total=7310 [2018-10-04 09:26:43,705 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 86 states. [2018-10-04 09:26:43,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:43,886 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-10-04 09:26:43,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-04 09:26:43,886 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 85 [2018-10-04 09:26:43,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:43,887 INFO L225 Difference]: With dead ends: 89 [2018-10-04 09:26:43,887 INFO L226 Difference]: Without dead ends: 88 [2018-10-04 09:26:43,888 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3444 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2794, Invalid=4516, Unknown=0, NotChecked=0, Total=7310 [2018-10-04 09:26:43,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-10-04 09:26:43,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-10-04 09:26:43,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-04 09:26:43,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-10-04 09:26:43,892 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 85 [2018-10-04 09:26:43,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:43,893 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-10-04 09:26:43,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-04 09:26:43,893 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-10-04 09:26:43,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-04 09:26:43,893 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:43,894 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1] [2018-10-04 09:26:43,894 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:43,894 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:43,894 INFO L82 PathProgramCache]: Analyzing trace with hash -335716044, now seen corresponding path program 42 times [2018-10-04 09:26:43,894 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:43,894 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:43,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:43,895 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:43,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:43,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:44,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:44,848 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:44,848 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:44,856 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:26:44,897 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-10-04 09:26:44,897 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:44,899 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:46,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:46,136 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:46,136 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 86 [2018-10-04 09:26:46,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-04 09:26:46,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-04 09:26:46,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2925, Invalid=4731, Unknown=0, NotChecked=0, Total=7656 [2018-10-04 09:26:46,138 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 88 states. [2018-10-04 09:26:46,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:46,349 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-10-04 09:26:46,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-04 09:26:46,349 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 87 [2018-10-04 09:26:46,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:46,350 INFO L225 Difference]: With dead ends: 91 [2018-10-04 09:26:46,351 INFO L226 Difference]: Without dead ends: 90 [2018-10-04 09:26:46,351 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3612 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2925, Invalid=4731, Unknown=0, NotChecked=0, Total=7656 [2018-10-04 09:26:46,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-10-04 09:26:46,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-10-04 09:26:46,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-10-04 09:26:46,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-10-04 09:26:46,355 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 87 [2018-10-04 09:26:46,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:46,355 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-10-04 09:26:46,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-04 09:26:46,355 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-10-04 09:26:46,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-10-04 09:26:46,355 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:46,356 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1] [2018-10-04 09:26:46,356 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:46,356 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:46,356 INFO L82 PathProgramCache]: Analyzing trace with hash -500569994, now seen corresponding path program 43 times [2018-10-04 09:26:46,356 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:46,356 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:46,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:46,357 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:46,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:46,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:47,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:47,547 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:47,547 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:47,556 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:26:47,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:47,582 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:48,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:48,721 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:48,721 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 88 [2018-10-04 09:26:48,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-04 09:26:48,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-04 09:26:48,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3059, Invalid=4951, Unknown=0, NotChecked=0, Total=8010 [2018-10-04 09:26:48,723 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 90 states. [2018-10-04 09:26:48,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:48,899 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-10-04 09:26:48,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-04 09:26:48,900 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 89 [2018-10-04 09:26:48,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:48,901 INFO L225 Difference]: With dead ends: 93 [2018-10-04 09:26:48,901 INFO L226 Difference]: Without dead ends: 92 [2018-10-04 09:26:48,902 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3784 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3059, Invalid=4951, Unknown=0, NotChecked=0, Total=8010 [2018-10-04 09:26:48,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-10-04 09:26:48,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-10-04 09:26:48,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-10-04 09:26:48,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-10-04 09:26:48,905 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 89 [2018-10-04 09:26:48,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:48,906 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-10-04 09:26:48,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-04 09:26:48,906 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-10-04 09:26:48,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-10-04 09:26:48,906 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:48,906 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1] [2018-10-04 09:26:48,907 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:48,907 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:48,907 INFO L82 PathProgramCache]: Analyzing trace with hash -11425992, now seen corresponding path program 44 times [2018-10-04 09:26:48,907 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:48,907 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:48,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:48,908 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:26:48,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:48,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:50,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:50,067 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:50,067 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:50,076 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:26:50,100 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:26:50,101 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:50,103 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:51,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:51,333 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:51,333 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 90 [2018-10-04 09:26:51,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-04 09:26:51,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-04 09:26:51,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3196, Invalid=5176, Unknown=0, NotChecked=0, Total=8372 [2018-10-04 09:26:51,334 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 92 states. [2018-10-04 09:26:51,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:51,509 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-10-04 09:26:51,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-04 09:26:51,509 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 91 [2018-10-04 09:26:51,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:51,510 INFO L225 Difference]: With dead ends: 95 [2018-10-04 09:26:51,511 INFO L226 Difference]: Without dead ends: 94 [2018-10-04 09:26:51,511 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3960 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3196, Invalid=5176, Unknown=0, NotChecked=0, Total=8372 [2018-10-04 09:26:51,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-10-04 09:26:51,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-10-04 09:26:51,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-04 09:26:51,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-10-04 09:26:51,516 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 91 [2018-10-04 09:26:51,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:51,516 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-10-04 09:26:51,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-04 09:26:51,517 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-10-04 09:26:51,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-10-04 09:26:51,517 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:51,517 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1] [2018-10-04 09:26:51,518 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:51,518 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:51,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1904524666, now seen corresponding path program 45 times [2018-10-04 09:26:51,518 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:51,518 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:51,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:51,519 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:51,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:51,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:52,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:52,833 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:52,833 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:52,843 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:26:52,885 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-10-04 09:26:52,885 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:52,887 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:54,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:54,171 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:54,171 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 92 [2018-10-04 09:26:54,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-10-04 09:26:54,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-10-04 09:26:54,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3336, Invalid=5406, Unknown=0, NotChecked=0, Total=8742 [2018-10-04 09:26:54,173 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 94 states. [2018-10-04 09:26:54,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:54,466 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-10-04 09:26:54,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-04 09:26:54,467 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 93 [2018-10-04 09:26:54,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:54,468 INFO L225 Difference]: With dead ends: 97 [2018-10-04 09:26:54,468 INFO L226 Difference]: Without dead ends: 96 [2018-10-04 09:26:54,469 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4140 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3336, Invalid=5406, Unknown=0, NotChecked=0, Total=8742 [2018-10-04 09:26:54,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-10-04 09:26:54,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-10-04 09:26:54,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-10-04 09:26:54,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-10-04 09:26:54,473 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 93 [2018-10-04 09:26:54,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:54,474 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-10-04 09:26:54,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-10-04 09:26:54,474 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-10-04 09:26:54,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-10-04 09:26:54,474 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:54,475 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1] [2018-10-04 09:26:54,475 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:54,475 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:54,475 INFO L82 PathProgramCache]: Analyzing trace with hash 592137020, now seen corresponding path program 46 times [2018-10-04 09:26:54,475 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:54,475 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:54,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:54,476 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:54,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:54,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:55,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:55,617 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:55,617 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:55,624 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:26:55,651 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:26:55,651 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:55,654 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:57,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:57,180 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:57,180 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 94 [2018-10-04 09:26:57,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-04 09:26:57,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-04 09:26:57,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3479, Invalid=5641, Unknown=0, NotChecked=0, Total=9120 [2018-10-04 09:26:57,181 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 96 states. [2018-10-04 09:26:57,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:57,386 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-10-04 09:26:57,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-04 09:26:57,387 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 95 [2018-10-04 09:26:57,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:57,388 INFO L225 Difference]: With dead ends: 99 [2018-10-04 09:26:57,388 INFO L226 Difference]: Without dead ends: 98 [2018-10-04 09:26:57,389 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4324 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3479, Invalid=5641, Unknown=0, NotChecked=0, Total=9120 [2018-10-04 09:26:57,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-10-04 09:26:57,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-10-04 09:26:57,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-04 09:26:57,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-10-04 09:26:57,394 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 95 [2018-10-04 09:26:57,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:57,394 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-10-04 09:26:57,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-04 09:26:57,394 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-10-04 09:26:57,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-10-04 09:26:57,395 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:57,395 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1] [2018-10-04 09:26:57,395 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:57,395 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:57,395 INFO L82 PathProgramCache]: Analyzing trace with hash 2107994238, now seen corresponding path program 47 times [2018-10-04 09:26:57,396 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:57,396 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:57,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:57,396 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:57,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:57,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:58,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:58,780 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:58,780 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:58,786 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:26:58,835 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-10-04 09:26:58,835 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:58,837 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:00,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:00,249 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:00,250 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 96 [2018-10-04 09:27:00,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-10-04 09:27:00,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-10-04 09:27:00,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3625, Invalid=5881, Unknown=0, NotChecked=0, Total=9506 [2018-10-04 09:27:00,251 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 98 states. [2018-10-04 09:27:00,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:00,454 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-10-04 09:27:00,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-04 09:27:00,455 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 97 [2018-10-04 09:27:00,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:00,456 INFO L225 Difference]: With dead ends: 101 [2018-10-04 09:27:00,456 INFO L226 Difference]: Without dead ends: 100 [2018-10-04 09:27:00,457 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4512 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3625, Invalid=5881, Unknown=0, NotChecked=0, Total=9506 [2018-10-04 09:27:00,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-10-04 09:27:00,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-10-04 09:27:00,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-04 09:27:00,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-10-04 09:27:00,461 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 97 [2018-10-04 09:27:00,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:00,462 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-10-04 09:27:00,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-10-04 09:27:00,462 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-10-04 09:27:00,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-10-04 09:27:00,462 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:00,463 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1] [2018-10-04 09:27:00,463 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:00,463 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:00,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1442099904, now seen corresponding path program 48 times [2018-10-04 09:27:00,463 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:00,463 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:00,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:00,464 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:00,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:00,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:01,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:01,695 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:01,695 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:01,702 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:27:01,750 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-10-04 09:27:01,751 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:01,753 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:03,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:03,331 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:03,331 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 98 [2018-10-04 09:27:03,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-10-04 09:27:03,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-10-04 09:27:03,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3774, Invalid=6126, Unknown=0, NotChecked=0, Total=9900 [2018-10-04 09:27:03,333 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 100 states. [2018-10-04 09:27:03,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:03,593 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-10-04 09:27:03,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-04 09:27:03,593 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 99 [2018-10-04 09:27:03,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:03,595 INFO L225 Difference]: With dead ends: 103 [2018-10-04 09:27:03,595 INFO L226 Difference]: Without dead ends: 102 [2018-10-04 09:27:03,596 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4704 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3774, Invalid=6126, Unknown=0, NotChecked=0, Total=9900 [2018-10-04 09:27:03,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-10-04 09:27:03,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-10-04 09:27:03,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-10-04 09:27:03,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-10-04 09:27:03,600 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 99 [2018-10-04 09:27:03,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:03,600 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-10-04 09:27:03,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-10-04 09:27:03,600 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-10-04 09:27:03,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-10-04 09:27:03,601 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:03,601 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1] [2018-10-04 09:27:03,601 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:03,601 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:03,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1416429954, now seen corresponding path program 49 times [2018-10-04 09:27:03,601 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:03,602 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:03,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:03,602 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:03,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:03,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:04,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:04,916 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:04,916 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:04,923 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:04,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:04,960 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:07,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:07,510 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:07,510 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 100 [2018-10-04 09:27:07,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-10-04 09:27:07,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-10-04 09:27:07,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3926, Invalid=6376, Unknown=0, NotChecked=0, Total=10302 [2018-10-04 09:27:07,512 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 102 states. [2018-10-04 09:27:07,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:07,790 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-10-04 09:27:07,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-04 09:27:07,791 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 101 [2018-10-04 09:27:07,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:07,792 INFO L225 Difference]: With dead ends: 105 [2018-10-04 09:27:07,792 INFO L226 Difference]: Without dead ends: 104 [2018-10-04 09:27:07,794 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4900 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3926, Invalid=6376, Unknown=0, NotChecked=0, Total=10302 [2018-10-04 09:27:07,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-10-04 09:27:07,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-10-04 09:27:07,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-10-04 09:27:07,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-10-04 09:27:07,798 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 101 [2018-10-04 09:27:07,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:07,799 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-10-04 09:27:07,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-10-04 09:27:07,799 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-10-04 09:27:07,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-10-04 09:27:07,799 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:07,800 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1] [2018-10-04 09:27:07,800 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:07,800 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:07,800 INFO L82 PathProgramCache]: Analyzing trace with hash -315445948, now seen corresponding path program 50 times [2018-10-04 09:27:07,800 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:07,800 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:07,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:07,801 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:07,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:07,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:09,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:09,110 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:09,110 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:09,119 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:27:09,157 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:27:09,157 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:09,159 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:10,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:10,620 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:10,620 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 102 [2018-10-04 09:27:10,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-10-04 09:27:10,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-10-04 09:27:10,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4081, Invalid=6631, Unknown=0, NotChecked=0, Total=10712 [2018-10-04 09:27:10,622 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 104 states. [2018-10-04 09:27:12,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:12,708 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-10-04 09:27:12,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-04 09:27:12,708 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 103 [2018-10-04 09:27:12,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:12,709 INFO L225 Difference]: With dead ends: 107 [2018-10-04 09:27:12,709 INFO L226 Difference]: Without dead ends: 106 [2018-10-04 09:27:12,711 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5100 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=4081, Invalid=6631, Unknown=0, NotChecked=0, Total=10712 [2018-10-04 09:27:12,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-10-04 09:27:12,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-10-04 09:27:12,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-10-04 09:27:12,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-10-04 09:27:12,715 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 103 [2018-10-04 09:27:12,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:12,715 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-10-04 09:27:12,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-10-04 09:27:12,716 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-10-04 09:27:12,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-10-04 09:27:12,716 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:12,716 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1] [2018-10-04 09:27:12,717 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:12,717 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:12,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1799123078, now seen corresponding path program 51 times [2018-10-04 09:27:12,717 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:12,717 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:12,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:12,719 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:12,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:12,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:14,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:14,065 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:14,065 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:14,071 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:27:14,124 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-10-04 09:27:14,124 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:14,126 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:15,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:15,646 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:15,646 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 104 [2018-10-04 09:27:15,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-10-04 09:27:15,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-10-04 09:27:15,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4239, Invalid=6891, Unknown=0, NotChecked=0, Total=11130 [2018-10-04 09:27:15,649 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 106 states. [2018-10-04 09:27:15,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:15,883 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-10-04 09:27:15,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-04 09:27:15,883 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 105 [2018-10-04 09:27:15,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:15,885 INFO L225 Difference]: With dead ends: 109 [2018-10-04 09:27:15,885 INFO L226 Difference]: Without dead ends: 108 [2018-10-04 09:27:15,886 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5304 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4239, Invalid=6891, Unknown=0, NotChecked=0, Total=11130 [2018-10-04 09:27:15,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-10-04 09:27:15,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-10-04 09:27:15,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-10-04 09:27:15,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-10-04 09:27:15,891 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 105 [2018-10-04 09:27:15,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:15,891 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-10-04 09:27:15,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-10-04 09:27:15,891 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-10-04 09:27:15,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-04 09:27:15,892 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:15,892 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1] [2018-10-04 09:27:15,892 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:15,892 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:15,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1914541240, now seen corresponding path program 52 times [2018-10-04 09:27:15,893 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:15,893 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:15,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:15,893 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:15,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:15,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:17,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:17,217 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:17,217 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:17,227 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:27:17,273 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:27:17,273 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:17,276 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:19,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:19,218 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:19,218 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 106 [2018-10-04 09:27:19,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-10-04 09:27:19,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-10-04 09:27:19,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4400, Invalid=7156, Unknown=0, NotChecked=0, Total=11556 [2018-10-04 09:27:19,220 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 108 states. [2018-10-04 09:27:19,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:19,428 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-10-04 09:27:19,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-04 09:27:19,429 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 107 [2018-10-04 09:27:19,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:19,430 INFO L225 Difference]: With dead ends: 111 [2018-10-04 09:27:19,430 INFO L226 Difference]: Without dead ends: 110 [2018-10-04 09:27:19,432 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5512 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4400, Invalid=7156, Unknown=0, NotChecked=0, Total=11556 [2018-10-04 09:27:19,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-04 09:27:19,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-10-04 09:27:19,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-10-04 09:27:19,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-10-04 09:27:19,436 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 107 [2018-10-04 09:27:19,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:19,436 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-10-04 09:27:19,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-10-04 09:27:19,436 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-10-04 09:27:19,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-10-04 09:27:19,437 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:19,437 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1] [2018-10-04 09:27:19,437 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:19,438 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:19,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1628127862, now seen corresponding path program 53 times [2018-10-04 09:27:19,438 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:19,438 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:19,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:19,439 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:19,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:19,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:20,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:20,702 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:20,703 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:20,713 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:27:20,846 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-10-04 09:27:20,847 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:20,849 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:22,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:22,964 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:22,965 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 108 [2018-10-04 09:27:22,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-10-04 09:27:22,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-10-04 09:27:22,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4564, Invalid=7426, Unknown=0, NotChecked=0, Total=11990 [2018-10-04 09:27:22,966 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 110 states. [2018-10-04 09:27:23,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:23,168 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-10-04 09:27:23,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-04 09:27:23,169 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 109 [2018-10-04 09:27:23,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:23,170 INFO L225 Difference]: With dead ends: 113 [2018-10-04 09:27:23,170 INFO L226 Difference]: Without dead ends: 112 [2018-10-04 09:27:23,171 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5724 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4564, Invalid=7426, Unknown=0, NotChecked=0, Total=11990 [2018-10-04 09:27:23,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-10-04 09:27:23,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-10-04 09:27:23,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-04 09:27:23,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-10-04 09:27:23,175 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 109 [2018-10-04 09:27:23,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:23,175 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-10-04 09:27:23,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-10-04 09:27:23,175 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-10-04 09:27:23,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-10-04 09:27:23,175 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:23,176 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1] [2018-10-04 09:27:23,176 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:23,176 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:23,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1262778548, now seen corresponding path program 54 times [2018-10-04 09:27:23,176 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:23,176 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:23,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:23,177 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:23,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:23,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:24,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:24,785 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:24,785 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:24,792 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:27:24,845 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-10-04 09:27:24,845 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:24,847 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:26,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:26,655 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:26,655 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 110 [2018-10-04 09:27:26,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-10-04 09:27:26,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-10-04 09:27:26,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4731, Invalid=7701, Unknown=0, NotChecked=0, Total=12432 [2018-10-04 09:27:26,657 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 112 states. [2018-10-04 09:27:26,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:26,872 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-10-04 09:27:26,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-04 09:27:26,873 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 111 [2018-10-04 09:27:26,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:26,874 INFO L225 Difference]: With dead ends: 115 [2018-10-04 09:27:26,874 INFO L226 Difference]: Without dead ends: 114 [2018-10-04 09:27:26,876 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5940 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4731, Invalid=7701, Unknown=0, NotChecked=0, Total=12432 [2018-10-04 09:27:26,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-10-04 09:27:26,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-10-04 09:27:26,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-10-04 09:27:26,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2018-10-04 09:27:26,880 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 111 [2018-10-04 09:27:26,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:26,881 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2018-10-04 09:27:26,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-10-04 09:27:26,881 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2018-10-04 09:27:26,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-10-04 09:27:26,881 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:26,882 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1] [2018-10-04 09:27:26,882 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:26,882 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:26,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1945561230, now seen corresponding path program 55 times [2018-10-04 09:27:26,882 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:26,882 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:26,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:26,883 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:26,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:26,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:28,897 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:28,897 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:28,897 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:28,906 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:28,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:28,937 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:30,621 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:30,642 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:30,642 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 112 [2018-10-04 09:27:30,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-10-04 09:27:30,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-10-04 09:27:30,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4901, Invalid=7981, Unknown=0, NotChecked=0, Total=12882 [2018-10-04 09:27:30,644 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 114 states. [2018-10-04 09:27:31,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:31,060 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-10-04 09:27:31,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-04 09:27:31,061 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 113 [2018-10-04 09:27:31,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:31,062 INFO L225 Difference]: With dead ends: 117 [2018-10-04 09:27:31,062 INFO L226 Difference]: Without dead ends: 116 [2018-10-04 09:27:31,063 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6160 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4901, Invalid=7981, Unknown=0, NotChecked=0, Total=12882 [2018-10-04 09:27:31,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-10-04 09:27:31,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-10-04 09:27:31,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-04 09:27:31,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2018-10-04 09:27:31,068 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 113 [2018-10-04 09:27:31,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:31,068 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2018-10-04 09:27:31,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-10-04 09:27:31,069 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2018-10-04 09:27:31,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-10-04 09:27:31,069 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:31,069 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 1, 1] [2018-10-04 09:27:31,070 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:31,070 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:31,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1373569360, now seen corresponding path program 56 times [2018-10-04 09:27:31,070 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:31,070 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:31,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:31,071 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:31,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:31,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:33,950 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:33,950 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:33,950 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:33,958 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:27:33,988 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:27:33,989 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:33,991 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:35,811 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:35,831 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:35,831 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 114 [2018-10-04 09:27:35,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-10-04 09:27:35,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-10-04 09:27:35,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5074, Invalid=8266, Unknown=0, NotChecked=0, Total=13340 [2018-10-04 09:27:35,833 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 116 states. [2018-10-04 09:27:36,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:36,132 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-10-04 09:27:36,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-04 09:27:36,132 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 115 [2018-10-04 09:27:36,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:36,134 INFO L225 Difference]: With dead ends: 119 [2018-10-04 09:27:36,134 INFO L226 Difference]: Without dead ends: 118 [2018-10-04 09:27:36,135 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6384 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=5074, Invalid=8266, Unknown=0, NotChecked=0, Total=13340 [2018-10-04 09:27:36,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-10-04 09:27:36,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-10-04 09:27:36,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-10-04 09:27:36,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2018-10-04 09:27:36,139 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 115 [2018-10-04 09:27:36,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:36,139 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2018-10-04 09:27:36,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-10-04 09:27:36,140 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2018-10-04 09:27:36,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-10-04 09:27:36,140 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:36,140 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 1, 1] [2018-10-04 09:27:36,141 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:36,141 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:36,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1445196178, now seen corresponding path program 57 times [2018-10-04 09:27:36,141 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:36,141 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:36,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:36,142 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:36,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:36,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:37,612 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:37,612 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:37,612 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:37,620 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:27:37,679 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-10-04 09:27:37,679 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:37,682 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:39,877 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:39,898 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:39,898 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 116 [2018-10-04 09:27:39,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-10-04 09:27:39,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-10-04 09:27:39,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5250, Invalid=8556, Unknown=0, NotChecked=0, Total=13806 [2018-10-04 09:27:39,900 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 118 states. [2018-10-04 09:27:40,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:40,159 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-10-04 09:27:40,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-04 09:27:40,160 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 117 [2018-10-04 09:27:40,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:40,161 INFO L225 Difference]: With dead ends: 121 [2018-10-04 09:27:40,161 INFO L226 Difference]: Without dead ends: 120 [2018-10-04 09:27:40,162 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6612 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=5250, Invalid=8556, Unknown=0, NotChecked=0, Total=13806 [2018-10-04 09:27:40,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-10-04 09:27:40,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2018-10-04 09:27:40,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-10-04 09:27:40,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2018-10-04 09:27:40,166 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 117 [2018-10-04 09:27:40,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:40,166 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2018-10-04 09:27:40,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-10-04 09:27:40,166 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2018-10-04 09:27:40,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-10-04 09:27:40,166 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:40,167 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 1, 1] [2018-10-04 09:27:40,167 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:40,167 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:40,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1559091540, now seen corresponding path program 58 times [2018-10-04 09:27:40,167 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:40,167 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:40,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:40,168 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:40,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:40,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:42,131 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:42,132 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:42,132 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:42,141 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:27:42,174 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:27:42,174 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:42,177 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:44,543 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:44,563 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:44,563 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 118 [2018-10-04 09:27:44,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-10-04 09:27:44,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-10-04 09:27:44,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5429, Invalid=8851, Unknown=0, NotChecked=0, Total=14280 [2018-10-04 09:27:44,565 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand 120 states. [2018-10-04 09:27:44,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:44,839 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-10-04 09:27:44,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-04 09:27:44,839 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 119 [2018-10-04 09:27:44,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:44,840 INFO L225 Difference]: With dead ends: 123 [2018-10-04 09:27:44,840 INFO L226 Difference]: Without dead ends: 122 [2018-10-04 09:27:44,841 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6844 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5429, Invalid=8851, Unknown=0, NotChecked=0, Total=14280 [2018-10-04 09:27:44,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-10-04 09:27:44,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2018-10-04 09:27:44,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-10-04 09:27:44,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2018-10-04 09:27:44,845 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 119 [2018-10-04 09:27:44,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:44,846 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2018-10-04 09:27:44,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-10-04 09:27:44,846 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2018-10-04 09:27:44,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-10-04 09:27:44,846 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:44,847 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 1, 1] [2018-10-04 09:27:44,847 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:44,847 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:44,847 INFO L82 PathProgramCache]: Analyzing trace with hash -656615274, now seen corresponding path program 59 times [2018-10-04 09:27:44,847 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:44,847 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:44,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:44,848 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:44,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:44,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:46,431 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:46,431 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:46,432 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:46,438 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:27:46,504 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-10-04 09:27:46,504 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:46,508 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:48,784 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:48,804 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:48,804 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 120 [2018-10-04 09:27:48,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-10-04 09:27:48,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-10-04 09:27:48,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5611, Invalid=9151, Unknown=0, NotChecked=0, Total=14762 [2018-10-04 09:27:48,807 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 122 states. [2018-10-04 09:27:49,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:49,065 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-10-04 09:27:49,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-04 09:27:49,066 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 121 [2018-10-04 09:27:49,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:49,067 INFO L225 Difference]: With dead ends: 125 [2018-10-04 09:27:49,067 INFO L226 Difference]: Without dead ends: 124 [2018-10-04 09:27:49,068 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7080 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5611, Invalid=9151, Unknown=0, NotChecked=0, Total=14762 [2018-10-04 09:27:49,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-10-04 09:27:49,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2018-10-04 09:27:49,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-10-04 09:27:49,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2018-10-04 09:27:49,074 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 121 [2018-10-04 09:27:49,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:49,074 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2018-10-04 09:27:49,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-10-04 09:27:49,074 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2018-10-04 09:27:49,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-10-04 09:27:49,075 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:49,075 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 1, 1] [2018-10-04 09:27:49,075 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:49,076 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:49,076 INFO L82 PathProgramCache]: Analyzing trace with hash 352915288, now seen corresponding path program 60 times [2018-10-04 09:27:49,076 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:49,076 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:49,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:49,077 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:49,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:49,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:50,752 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:50,752 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:50,753 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:50,761 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:27:50,823 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-10-04 09:27:50,823 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:50,825 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:52,909 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:52,929 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:52,929 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 122 [2018-10-04 09:27:52,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-10-04 09:27:52,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-10-04 09:27:52,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5796, Invalid=9456, Unknown=0, NotChecked=0, Total=15252 [2018-10-04 09:27:52,931 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 124 states. [2018-10-04 09:27:53,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:53,231 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-10-04 09:27:53,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-04 09:27:53,232 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 123 [2018-10-04 09:27:53,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:53,232 INFO L225 Difference]: With dead ends: 127 [2018-10-04 09:27:53,232 INFO L226 Difference]: Without dead ends: 126 [2018-10-04 09:27:53,233 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7320 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5796, Invalid=9456, Unknown=0, NotChecked=0, Total=15252 [2018-10-04 09:27:53,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-10-04 09:27:53,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2018-10-04 09:27:53,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-10-04 09:27:53,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2018-10-04 09:27:53,236 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 123 [2018-10-04 09:27:53,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:53,237 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2018-10-04 09:27:53,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-10-04 09:27:53,237 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2018-10-04 09:27:53,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-10-04 09:27:53,237 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:53,237 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 1, 1] [2018-10-04 09:27:53,237 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:53,238 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:53,238 INFO L82 PathProgramCache]: Analyzing trace with hash -150823526, now seen corresponding path program 61 times [2018-10-04 09:27:53,238 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:53,238 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:53,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:53,238 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:53,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:53,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:55,877 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:55,877 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:55,878 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:55,885 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:55,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:55,918 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:57,930 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:57,951 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:57,951 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 124 [2018-10-04 09:27:57,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-10-04 09:27:57,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-10-04 09:27:57,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5984, Invalid=9766, Unknown=0, NotChecked=0, Total=15750 [2018-10-04 09:27:57,953 INFO L87 Difference]: Start difference. First operand 126 states and 126 transitions. Second operand 126 states. [2018-10-04 09:27:58,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:58,239 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-10-04 09:27:58,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-04 09:27:58,239 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 125 [2018-10-04 09:27:58,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:58,241 INFO L225 Difference]: With dead ends: 129 [2018-10-04 09:27:58,241 INFO L226 Difference]: Without dead ends: 128 [2018-10-04 09:27:58,242 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7564 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=5984, Invalid=9766, Unknown=0, NotChecked=0, Total=15750 [2018-10-04 09:27:58,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-10-04 09:27:58,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2018-10-04 09:27:58,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-10-04 09:27:58,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2018-10-04 09:27:58,246 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 125 [2018-10-04 09:27:58,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:58,246 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2018-10-04 09:27:58,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-10-04 09:27:58,246 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2018-10-04 09:27:58,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-10-04 09:27:58,247 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:58,247 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 1, 1] [2018-10-04 09:27:58,247 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:58,247 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:58,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1087480668, now seen corresponding path program 62 times [2018-10-04 09:27:58,247 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:58,247 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:58,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:58,248 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:58,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:58,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:00,659 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:00,659 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:00,659 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:00,666 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:28:00,699 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:28:00,699 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:00,701 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:02,856 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:02,876 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:02,876 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 126 [2018-10-04 09:28:02,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-10-04 09:28:02,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-10-04 09:28:02,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6175, Invalid=10081, Unknown=0, NotChecked=0, Total=16256 [2018-10-04 09:28:02,878 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 128 states. [2018-10-04 09:28:03,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:03,145 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-10-04 09:28:03,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-04 09:28:03,145 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 127 [2018-10-04 09:28:03,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:03,146 INFO L225 Difference]: With dead ends: 131 [2018-10-04 09:28:03,146 INFO L226 Difference]: Without dead ends: 130 [2018-10-04 09:28:03,147 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7812 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=6175, Invalid=10081, Unknown=0, NotChecked=0, Total=16256 [2018-10-04 09:28:03,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-10-04 09:28:03,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2018-10-04 09:28:03,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-10-04 09:28:03,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 130 transitions. [2018-10-04 09:28:03,152 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 130 transitions. Word has length 127 [2018-10-04 09:28:03,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:03,152 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 130 transitions. [2018-10-04 09:28:03,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-10-04 09:28:03,152 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 130 transitions. [2018-10-04 09:28:03,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-10-04 09:28:03,153 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:03,153 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 1, 1] [2018-10-04 09:28:03,153 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:03,153 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:03,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1391870110, now seen corresponding path program 63 times [2018-10-04 09:28:03,154 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:03,154 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:03,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:03,155 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:03,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:03,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:05,267 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:05,267 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:05,267 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:05,278 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:28:05,349 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-10-04 09:28:05,349 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:05,351 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:07,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:07,611 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:07,611 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 128 [2018-10-04 09:28:07,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-10-04 09:28:07,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-10-04 09:28:07,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6369, Invalid=10401, Unknown=0, NotChecked=0, Total=16770 [2018-10-04 09:28:07,613 INFO L87 Difference]: Start difference. First operand 130 states and 130 transitions. Second operand 130 states. [2018-10-04 09:28:07,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:07,930 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-10-04 09:28:07,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-04 09:28:07,931 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 129 [2018-10-04 09:28:07,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:07,932 INFO L225 Difference]: With dead ends: 133 [2018-10-04 09:28:07,932 INFO L226 Difference]: Without dead ends: 132 [2018-10-04 09:28:07,933 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8064 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=6369, Invalid=10401, Unknown=0, NotChecked=0, Total=16770 [2018-10-04 09:28:07,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-10-04 09:28:07,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2018-10-04 09:28:07,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-10-04 09:28:07,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2018-10-04 09:28:07,938 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 129 [2018-10-04 09:28:07,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:07,938 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2018-10-04 09:28:07,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-10-04 09:28:07,938 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2018-10-04 09:28:07,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-10-04 09:28:07,939 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:07,939 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 1, 1] [2018-10-04 09:28:07,940 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:07,940 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:07,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1852347744, now seen corresponding path program 64 times [2018-10-04 09:28:07,940 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:07,940 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:07,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:07,941 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:07,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:07,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:09,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:09,985 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:09,985 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:09,992 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:28:10,033 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:28:10,033 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:10,036 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:12,385 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:12,405 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:12,405 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 130 [2018-10-04 09:28:12,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-10-04 09:28:12,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-10-04 09:28:12,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6566, Invalid=10726, Unknown=0, NotChecked=0, Total=17292 [2018-10-04 09:28:12,408 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand 132 states. [2018-10-04 09:28:12,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:12,687 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-10-04 09:28:12,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-04 09:28:12,688 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 131 [2018-10-04 09:28:12,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:12,689 INFO L225 Difference]: With dead ends: 135 [2018-10-04 09:28:12,689 INFO L226 Difference]: Without dead ends: 134 [2018-10-04 09:28:12,690 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8320 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=6566, Invalid=10726, Unknown=0, NotChecked=0, Total=17292 [2018-10-04 09:28:12,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-10-04 09:28:12,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2018-10-04 09:28:12,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-10-04 09:28:12,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2018-10-04 09:28:12,695 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 131 [2018-10-04 09:28:12,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:12,696 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2018-10-04 09:28:12,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-10-04 09:28:12,696 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2018-10-04 09:28:12,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-10-04 09:28:12,696 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:12,697 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 1, 1] [2018-10-04 09:28:12,697 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:12,697 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:12,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1989722530, now seen corresponding path program 65 times [2018-10-04 09:28:12,697 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:12,697 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:12,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:12,698 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:12,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:12,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:14,803 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:14,803 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:14,803 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:14,810 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:28:14,882 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-10-04 09:28:14,882 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:14,888 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:18,168 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:18,188 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:18,189 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 132 [2018-10-04 09:28:18,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-10-04 09:28:18,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-10-04 09:28:18,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6766, Invalid=11056, Unknown=0, NotChecked=0, Total=17822 [2018-10-04 09:28:18,191 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand 134 states. [2018-10-04 09:28:18,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:18,536 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-10-04 09:28:18,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-04 09:28:18,536 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 133 [2018-10-04 09:28:18,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:18,538 INFO L225 Difference]: With dead ends: 137 [2018-10-04 09:28:18,538 INFO L226 Difference]: Without dead ends: 136 [2018-10-04 09:28:18,539 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8580 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=6766, Invalid=11056, Unknown=0, NotChecked=0, Total=17822 [2018-10-04 09:28:18,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-10-04 09:28:18,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2018-10-04 09:28:18,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-10-04 09:28:18,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2018-10-04 09:28:18,544 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 133 [2018-10-04 09:28:18,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:18,544 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2018-10-04 09:28:18,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-10-04 09:28:18,545 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2018-10-04 09:28:18,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-10-04 09:28:18,545 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:18,545 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 1, 1] [2018-10-04 09:28:18,545 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:18,546 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:18,546 INFO L82 PathProgramCache]: Analyzing trace with hash 862905700, now seen corresponding path program 66 times [2018-10-04 09:28:18,546 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:18,546 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:18,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:18,546 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:18,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:18,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:20,735 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:20,735 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:20,736 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:20,744 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:28:20,813 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-10-04 09:28:20,814 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:20,816 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:23,339 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:23,359 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:23,360 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 134 [2018-10-04 09:28:23,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-10-04 09:28:23,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-10-04 09:28:23,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6969, Invalid=11391, Unknown=0, NotChecked=0, Total=18360 [2018-10-04 09:28:23,362 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand 136 states. [2018-10-04 09:28:23,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:23,687 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-10-04 09:28:23,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-04 09:28:23,688 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 135 [2018-10-04 09:28:23,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:23,689 INFO L225 Difference]: With dead ends: 139 [2018-10-04 09:28:23,689 INFO L226 Difference]: Without dead ends: 138 [2018-10-04 09:28:23,691 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8844 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=6969, Invalid=11391, Unknown=0, NotChecked=0, Total=18360 [2018-10-04 09:28:23,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-10-04 09:28:23,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2018-10-04 09:28:23,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-10-04 09:28:23,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2018-10-04 09:28:23,694 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 135 [2018-10-04 09:28:23,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:23,694 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2018-10-04 09:28:23,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-10-04 09:28:23,694 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2018-10-04 09:28:23,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-10-04 09:28:23,694 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:23,695 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 1, 1] [2018-10-04 09:28:23,695 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:23,695 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:23,695 INFO L82 PathProgramCache]: Analyzing trace with hash 323690662, now seen corresponding path program 67 times [2018-10-04 09:28:23,695 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:23,695 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:23,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:23,696 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:23,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:23,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:26,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:26,044 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:26,044 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:26,051 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:28:26,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:26,087 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:28,577 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:28,596 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:28,597 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 136 [2018-10-04 09:28:28,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-10-04 09:28:28,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-10-04 09:28:28,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7175, Invalid=11731, Unknown=0, NotChecked=0, Total=18906 [2018-10-04 09:28:28,598 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand 138 states. [2018-10-04 09:28:28,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:28,914 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-10-04 09:28:28,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-04 09:28:28,914 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 137 [2018-10-04 09:28:28,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:28,915 INFO L225 Difference]: With dead ends: 141 [2018-10-04 09:28:28,915 INFO L226 Difference]: Without dead ends: 140 [2018-10-04 09:28:28,916 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9112 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=7175, Invalid=11731, Unknown=0, NotChecked=0, Total=18906 [2018-10-04 09:28:28,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-10-04 09:28:28,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2018-10-04 09:28:28,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-10-04 09:28:28,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2018-10-04 09:28:28,920 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 137 [2018-10-04 09:28:28,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:28,920 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2018-10-04 09:28:28,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-10-04 09:28:28,920 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2018-10-04 09:28:28,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-10-04 09:28:28,921 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:28,921 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 1, 1] [2018-10-04 09:28:28,921 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:28,921 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:28,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1829081960, now seen corresponding path program 68 times [2018-10-04 09:28:28,922 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:28,922 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:28,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:28,923 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:28:28,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:28,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:31,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:31,200 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:31,200 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:31,207 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:28:31,242 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:28:31,242 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:31,244 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:33,833 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:33,853 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:33,853 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 138 [2018-10-04 09:28:33,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 140 states [2018-10-04 09:28:33,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2018-10-04 09:28:33,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7384, Invalid=12076, Unknown=0, NotChecked=0, Total=19460 [2018-10-04 09:28:33,855 INFO L87 Difference]: Start difference. First operand 140 states and 140 transitions. Second operand 140 states. [2018-10-04 09:28:34,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:34,217 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-10-04 09:28:34,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-04 09:28:34,217 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 139 [2018-10-04 09:28:34,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:34,218 INFO L225 Difference]: With dead ends: 143 [2018-10-04 09:28:34,218 INFO L226 Difference]: Without dead ends: 142 [2018-10-04 09:28:34,219 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9384 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=7384, Invalid=12076, Unknown=0, NotChecked=0, Total=19460 [2018-10-04 09:28:34,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-10-04 09:28:34,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2018-10-04 09:28:34,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-10-04 09:28:34,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 142 transitions. [2018-10-04 09:28:34,223 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 142 transitions. Word has length 139 [2018-10-04 09:28:34,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:34,223 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 142 transitions. [2018-10-04 09:28:34,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has 140 states. [2018-10-04 09:28:34,224 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 142 transitions. [2018-10-04 09:28:34,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-10-04 09:28:34,224 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:34,224 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 1, 1] [2018-10-04 09:28:34,225 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:34,225 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:34,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1106140586, now seen corresponding path program 69 times [2018-10-04 09:28:34,225 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:34,225 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:34,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:34,226 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:34,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:34,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:36,432 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:36,432 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:36,432 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:36,439 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:28:36,516 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-10-04 09:28:36,516 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:36,519 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:39,119 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:39,139 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:39,139 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 140 [2018-10-04 09:28:39,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-10-04 09:28:39,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-10-04 09:28:39,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7596, Invalid=12426, Unknown=0, NotChecked=0, Total=20022 [2018-10-04 09:28:39,142 INFO L87 Difference]: Start difference. First operand 142 states and 142 transitions. Second operand 142 states. [2018-10-04 09:28:39,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:39,616 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-10-04 09:28:39,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-04 09:28:39,617 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 141 [2018-10-04 09:28:39,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:39,618 INFO L225 Difference]: With dead ends: 145 [2018-10-04 09:28:39,618 INFO L226 Difference]: Without dead ends: 144 [2018-10-04 09:28:39,620 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9660 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=7596, Invalid=12426, Unknown=0, NotChecked=0, Total=20022 [2018-10-04 09:28:39,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-10-04 09:28:39,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2018-10-04 09:28:39,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-10-04 09:28:39,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 144 transitions. [2018-10-04 09:28:39,624 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 144 transitions. Word has length 141 [2018-10-04 09:28:39,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:39,624 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 144 transitions. [2018-10-04 09:28:39,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-10-04 09:28:39,624 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 144 transitions. [2018-10-04 09:28:39,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-10-04 09:28:39,624 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:39,625 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 1, 1] [2018-10-04 09:28:39,625 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:39,625 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:39,625 INFO L82 PathProgramCache]: Analyzing trace with hash 2144182124, now seen corresponding path program 70 times [2018-10-04 09:28:39,625 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:39,625 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:39,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:39,626 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:39,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:39,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:41,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:41,951 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:41,951 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:41,957 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:28:41,998 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:28:41,998 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:42,001 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:45,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:45,277 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:45,278 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 142 [2018-10-04 09:28:45,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-10-04 09:28:45,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-10-04 09:28:45,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7811, Invalid=12781, Unknown=0, NotChecked=0, Total=20592 [2018-10-04 09:28:45,280 INFO L87 Difference]: Start difference. First operand 144 states and 144 transitions. Second operand 144 states. [2018-10-04 09:28:45,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:45,666 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-10-04 09:28:45,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-04 09:28:45,667 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 143 [2018-10-04 09:28:45,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:45,668 INFO L225 Difference]: With dead ends: 147 [2018-10-04 09:28:45,668 INFO L226 Difference]: Without dead ends: 146 [2018-10-04 09:28:45,669 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9940 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=7811, Invalid=12781, Unknown=0, NotChecked=0, Total=20592 [2018-10-04 09:28:45,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-10-04 09:28:45,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2018-10-04 09:28:45,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-10-04 09:28:45,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 146 transitions. [2018-10-04 09:28:45,674 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 146 transitions. Word has length 143 [2018-10-04 09:28:45,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:45,674 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 146 transitions. [2018-10-04 09:28:45,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-10-04 09:28:45,675 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 146 transitions. [2018-10-04 09:28:45,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-10-04 09:28:45,675 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:45,675 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 1, 1] [2018-10-04 09:28:45,676 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:45,676 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:45,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1025279826, now seen corresponding path program 71 times [2018-10-04 09:28:45,676 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:45,676 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:45,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:45,677 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:45,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:45,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:47,897 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:47,897 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:47,897 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:47,905 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:28:48,104 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-10-04 09:28:48,104 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:48,110 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:51,456 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:51,477 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:51,477 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 144 [2018-10-04 09:28:51,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 146 states [2018-10-04 09:28:51,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2018-10-04 09:28:51,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8029, Invalid=13141, Unknown=0, NotChecked=0, Total=21170 [2018-10-04 09:28:51,479 INFO L87 Difference]: Start difference. First operand 146 states and 146 transitions. Second operand 146 states. [2018-10-04 09:28:51,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:51,839 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-10-04 09:28:51,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-04 09:28:51,840 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 145 [2018-10-04 09:28:51,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:51,841 INFO L225 Difference]: With dead ends: 149 [2018-10-04 09:28:51,841 INFO L226 Difference]: Without dead ends: 148 [2018-10-04 09:28:51,843 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10224 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=8029, Invalid=13141, Unknown=0, NotChecked=0, Total=21170 [2018-10-04 09:28:51,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-10-04 09:28:51,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2018-10-04 09:28:51,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-10-04 09:28:51,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2018-10-04 09:28:51,847 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 145 [2018-10-04 09:28:51,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:51,847 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2018-10-04 09:28:51,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has 146 states. [2018-10-04 09:28:51,848 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2018-10-04 09:28:51,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-10-04 09:28:51,848 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:51,849 INFO L375 BasicCegarLoop]: trace histogram [73, 72, 1, 1] [2018-10-04 09:28:51,849 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:51,849 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:51,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1746400912, now seen corresponding path program 72 times [2018-10-04 09:28:51,849 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:51,849 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:51,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:51,850 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:51,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:51,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:54,540 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:54,540 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:54,541 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:54,547 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:28:54,673 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-10-04 09:28:54,673 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:54,676 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:57,674 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:57,694 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:57,695 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 146 [2018-10-04 09:28:57,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 148 states [2018-10-04 09:28:57,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2018-10-04 09:28:57,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8250, Invalid=13506, Unknown=0, NotChecked=0, Total=21756 [2018-10-04 09:28:57,697 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 148 states. [2018-10-04 09:28:58,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:58,312 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-10-04 09:28:58,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-04 09:28:58,312 INFO L78 Accepts]: Start accepts. Automaton has 148 states. Word has length 147 [2018-10-04 09:28:58,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:58,314 INFO L225 Difference]: With dead ends: 151 [2018-10-04 09:28:58,314 INFO L226 Difference]: Without dead ends: 150 [2018-10-04 09:28:58,316 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10512 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=8250, Invalid=13506, Unknown=0, NotChecked=0, Total=21756 [2018-10-04 09:28:58,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-10-04 09:28:58,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2018-10-04 09:28:58,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-10-04 09:28:58,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 150 transitions. [2018-10-04 09:28:58,321 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 150 transitions. Word has length 147 [2018-10-04 09:28:58,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:58,321 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 150 transitions. [2018-10-04 09:28:58,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has 148 states. [2018-10-04 09:28:58,321 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 150 transitions. [2018-10-04 09:28:58,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-10-04 09:28:58,322 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:58,322 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 1, 1] [2018-10-04 09:28:58,323 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:58,323 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:58,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1040937394, now seen corresponding path program 73 times [2018-10-04 09:28:58,323 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:58,323 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:58,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:58,324 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:58,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:58,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:00,931 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:00,931 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:00,931 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:00,938 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:29:00,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:00,977 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:03,995 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:04,014 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:04,015 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 148 [2018-10-04 09:29:04,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 150 states [2018-10-04 09:29:04,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2018-10-04 09:29:04,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8474, Invalid=13876, Unknown=0, NotChecked=0, Total=22350 [2018-10-04 09:29:04,017 INFO L87 Difference]: Start difference. First operand 150 states and 150 transitions. Second operand 150 states. [2018-10-04 09:29:04,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:04,389 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-10-04 09:29:04,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-04 09:29:04,390 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 149 [2018-10-04 09:29:04,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:04,391 INFO L225 Difference]: With dead ends: 153 [2018-10-04 09:29:04,391 INFO L226 Difference]: Without dead ends: 152 [2018-10-04 09:29:04,392 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10804 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=8474, Invalid=13876, Unknown=0, NotChecked=0, Total=22350 [2018-10-04 09:29:04,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-10-04 09:29:04,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2018-10-04 09:29:04,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-10-04 09:29:04,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 152 transitions. [2018-10-04 09:29:04,396 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 152 transitions. Word has length 149 [2018-10-04 09:29:04,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:04,396 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 152 transitions. [2018-10-04 09:29:04,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has 150 states. [2018-10-04 09:29:04,397 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 152 transitions. [2018-10-04 09:29:04,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-10-04 09:29:04,397 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:04,397 INFO L375 BasicCegarLoop]: trace histogram [75, 74, 1, 1] [2018-10-04 09:29:04,398 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:04,398 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:04,398 INFO L82 PathProgramCache]: Analyzing trace with hash -386543244, now seen corresponding path program 74 times [2018-10-04 09:29:04,398 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:04,398 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:04,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:04,399 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:29:04,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:04,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:07,094 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:07,094 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:07,094 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:07,101 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:29:07,138 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:29:07,138 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:29:07,141 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:10,277 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:10,297 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:10,297 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 150 [2018-10-04 09:29:10,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 152 states [2018-10-04 09:29:10,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2018-10-04 09:29:10,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8701, Invalid=14251, Unknown=0, NotChecked=0, Total=22952 [2018-10-04 09:29:10,300 INFO L87 Difference]: Start difference. First operand 152 states and 152 transitions. Second operand 152 states. [2018-10-04 09:29:10,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:10,711 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-10-04 09:29:10,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-04 09:29:10,711 INFO L78 Accepts]: Start accepts. Automaton has 152 states. Word has length 151 [2018-10-04 09:29:10,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:10,712 INFO L225 Difference]: With dead ends: 155 [2018-10-04 09:29:10,712 INFO L226 Difference]: Without dead ends: 154 [2018-10-04 09:29:10,713 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11100 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=8701, Invalid=14251, Unknown=0, NotChecked=0, Total=22952 [2018-10-04 09:29:10,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-10-04 09:29:10,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2018-10-04 09:29:10,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-10-04 09:29:10,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 154 transitions. [2018-10-04 09:29:10,716 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 154 transitions. Word has length 151 [2018-10-04 09:29:10,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:10,716 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 154 transitions. [2018-10-04 09:29:10,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has 152 states. [2018-10-04 09:29:10,717 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 154 transitions. [2018-10-04 09:29:10,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-10-04 09:29:10,717 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:10,717 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 1, 1] [2018-10-04 09:29:10,717 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:10,718 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:10,718 INFO L82 PathProgramCache]: Analyzing trace with hash -2100868938, now seen corresponding path program 75 times [2018-10-04 09:29:10,718 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:10,718 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:10,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:10,719 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:29:10,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:10,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:13,213 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:13,213 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:13,214 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:13,221 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:29:13,313 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-10-04 09:29:13,314 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:29:13,316 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:16,622 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:16,642 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:16,642 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 152 [2018-10-04 09:29:16,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 154 states [2018-10-04 09:29:16,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2018-10-04 09:29:16,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8931, Invalid=14631, Unknown=0, NotChecked=0, Total=23562 [2018-10-04 09:29:16,645 INFO L87 Difference]: Start difference. First operand 154 states and 154 transitions. Second operand 154 states. [2018-10-04 09:29:17,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:17,062 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-10-04 09:29:17,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-04 09:29:17,063 INFO L78 Accepts]: Start accepts. Automaton has 154 states. Word has length 153 [2018-10-04 09:29:17,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:17,064 INFO L225 Difference]: With dead ends: 157 [2018-10-04 09:29:17,064 INFO L226 Difference]: Without dead ends: 156 [2018-10-04 09:29:17,065 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11400 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=8931, Invalid=14631, Unknown=0, NotChecked=0, Total=23562 [2018-10-04 09:29:17,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-10-04 09:29:17,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2018-10-04 09:29:17,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-10-04 09:29:17,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 156 transitions. [2018-10-04 09:29:17,070 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 156 transitions. Word has length 153 [2018-10-04 09:29:17,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:17,070 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 156 transitions. [2018-10-04 09:29:17,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has 154 states. [2018-10-04 09:29:17,070 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 156 transitions. [2018-10-04 09:29:17,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-10-04 09:29:17,070 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:17,071 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 1, 1] [2018-10-04 09:29:17,071 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:17,071 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:17,071 INFO L82 PathProgramCache]: Analyzing trace with hash -300419208, now seen corresponding path program 76 times [2018-10-04 09:29:17,071 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:17,071 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:17,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:17,072 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:29:17,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:17,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:19,605 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:19,605 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:19,605 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:19,612 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:29:19,658 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:29:19,658 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:29:19,662 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:23,046 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:23,066 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:23,066 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 154 [2018-10-04 09:29:23,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 156 states [2018-10-04 09:29:23,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2018-10-04 09:29:23,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9164, Invalid=15016, Unknown=0, NotChecked=0, Total=24180 [2018-10-04 09:29:23,068 INFO L87 Difference]: Start difference. First operand 156 states and 156 transitions. Second operand 156 states. [2018-10-04 09:29:23,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:23,419 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-10-04 09:29:23,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-04 09:29:23,420 INFO L78 Accepts]: Start accepts. Automaton has 156 states. Word has length 155 [2018-10-04 09:29:23,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:23,421 INFO L225 Difference]: With dead ends: 159 [2018-10-04 09:29:23,421 INFO L226 Difference]: Without dead ends: 158 [2018-10-04 09:29:23,422 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11704 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=9164, Invalid=15016, Unknown=0, NotChecked=0, Total=24180 [2018-10-04 09:29:23,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-10-04 09:29:23,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2018-10-04 09:29:23,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-10-04 09:29:23,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 158 transitions. [2018-10-04 09:29:23,426 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 158 transitions. Word has length 155 [2018-10-04 09:29:23,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:23,427 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 158 transitions. [2018-10-04 09:29:23,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has 156 states. [2018-10-04 09:29:23,427 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 158 transitions. [2018-10-04 09:29:23,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-10-04 09:29:23,427 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:23,427 INFO L375 BasicCegarLoop]: trace histogram [78, 77, 1, 1] [2018-10-04 09:29:23,428 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:23,428 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:23,428 INFO L82 PathProgramCache]: Analyzing trace with hash -940048966, now seen corresponding path program 77 times [2018-10-04 09:29:23,428 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:23,428 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:23,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:23,429 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:29:23,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:23,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:26,256 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:26,256 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:26,256 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:26,263 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:29:26,367 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-10-04 09:29:26,367 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:29:26,371 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:29,604 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:29,626 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:29,626 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 156 [2018-10-04 09:29:29,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 158 states [2018-10-04 09:29:29,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2018-10-04 09:29:29,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9400, Invalid=15406, Unknown=0, NotChecked=0, Total=24806 [2018-10-04 09:29:29,628 INFO L87 Difference]: Start difference. First operand 158 states and 158 transitions. Second operand 158 states. [2018-10-04 09:29:30,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:30,003 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-10-04 09:29:30,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-04 09:29:30,003 INFO L78 Accepts]: Start accepts. Automaton has 158 states. Word has length 157 [2018-10-04 09:29:30,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:30,004 INFO L225 Difference]: With dead ends: 161 [2018-10-04 09:29:30,004 INFO L226 Difference]: Without dead ends: 160 [2018-10-04 09:29:30,005 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12012 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=9400, Invalid=15406, Unknown=0, NotChecked=0, Total=24806 [2018-10-04 09:29:30,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-10-04 09:29:30,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2018-10-04 09:29:30,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-10-04 09:29:30,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 160 transitions. [2018-10-04 09:29:30,011 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 160 transitions. Word has length 157 [2018-10-04 09:29:30,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:30,011 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 160 transitions. [2018-10-04 09:29:30,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has 158 states. [2018-10-04 09:29:30,011 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 160 transitions. [2018-10-04 09:29:30,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-10-04 09:29:30,012 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:30,012 INFO L375 BasicCegarLoop]: trace histogram [79, 78, 1, 1] [2018-10-04 09:29:30,012 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:30,013 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:30,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1443923076, now seen corresponding path program 78 times [2018-10-04 09:29:30,013 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:30,013 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:30,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:30,014 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:29:30,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:30,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:32,873 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:32,873 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:32,873 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:32,880 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:29:33,010 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-10-04 09:29:33,010 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:29:33,013 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:36,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:36,579 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:36,579 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 158 [2018-10-04 09:29:36,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 160 states [2018-10-04 09:29:36,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2018-10-04 09:29:36,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9639, Invalid=15801, Unknown=0, NotChecked=0, Total=25440 [2018-10-04 09:29:36,581 INFO L87 Difference]: Start difference. First operand 160 states and 160 transitions. Second operand 160 states. [2018-10-04 09:29:36,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:36,988 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-10-04 09:29:36,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-04 09:29:36,988 INFO L78 Accepts]: Start accepts. Automaton has 160 states. Word has length 159 [2018-10-04 09:29:36,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:36,989 INFO L225 Difference]: With dead ends: 163 [2018-10-04 09:29:36,989 INFO L226 Difference]: Without dead ends: 162 [2018-10-04 09:29:36,990 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12324 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=9639, Invalid=15801, Unknown=0, NotChecked=0, Total=25440 [2018-10-04 09:29:36,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-10-04 09:29:36,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2018-10-04 09:29:36,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2018-10-04 09:29:36,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 162 transitions. [2018-10-04 09:29:36,996 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 162 transitions. Word has length 159 [2018-10-04 09:29:36,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:36,996 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 162 transitions. [2018-10-04 09:29:36,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has 160 states. [2018-10-04 09:29:36,996 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 162 transitions. [2018-10-04 09:29:36,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-10-04 09:29:36,997 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:36,997 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 1, 1] [2018-10-04 09:29:36,998 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:36,998 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:36,998 INFO L82 PathProgramCache]: Analyzing trace with hash -335638338, now seen corresponding path program 79 times [2018-10-04 09:29:36,998 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:36,998 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:36,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:36,999 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:29:36,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:37,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:39,746 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:39,747 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:39,747 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:39,754 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:29:39,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:39,799 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:43,501 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:43,521 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:43,521 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 160 [2018-10-04 09:29:43,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 162 states [2018-10-04 09:29:43,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2018-10-04 09:29:43,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9881, Invalid=16201, Unknown=0, NotChecked=0, Total=26082 [2018-10-04 09:29:43,523 INFO L87 Difference]: Start difference. First operand 162 states and 162 transitions. Second operand 162 states. [2018-10-04 09:29:43,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:43,919 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-10-04 09:29:43,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-04 09:29:43,920 INFO L78 Accepts]: Start accepts. Automaton has 162 states. Word has length 161 [2018-10-04 09:29:43,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:43,921 INFO L225 Difference]: With dead ends: 165 [2018-10-04 09:29:43,921 INFO L226 Difference]: Without dead ends: 164 [2018-10-04 09:29:43,922 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12640 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=9881, Invalid=16201, Unknown=0, NotChecked=0, Total=26082 [2018-10-04 09:29:43,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-10-04 09:29:43,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2018-10-04 09:29:43,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-10-04 09:29:43,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 164 transitions. [2018-10-04 09:29:43,927 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 164 transitions. Word has length 161 [2018-10-04 09:29:43,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:43,928 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 164 transitions. [2018-10-04 09:29:43,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has 162 states. [2018-10-04 09:29:43,928 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 164 transitions. [2018-10-04 09:29:43,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-10-04 09:29:43,929 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:43,929 INFO L375 BasicCegarLoop]: trace histogram [81, 80, 1, 1] [2018-10-04 09:29:43,929 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:43,929 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:43,929 INFO L82 PathProgramCache]: Analyzing trace with hash -425894528, now seen corresponding path program 80 times [2018-10-04 09:29:43,929 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:43,930 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:43,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:43,930 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:29:43,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:43,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:46,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:46,927 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:46,927 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:46,934 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:29:46,977 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:29:46,977 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:29:46,980 INFO L273 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2018-10-04 09:29:47,806 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-10-04 09:29:48,007 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:48,007 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-04 09:29:48,013 WARN L205 ceAbstractionStarter]: Timeout [2018-10-04 09:29:48,014 INFO L202 PluginConnector]: Adding new model LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.10 09:29:48 BoogieIcfgContainer [2018-10-04 09:29:48,014 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-04 09:29:48,015 INFO L168 Benchmark]: Toolchain (without parser) took 237397.42 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -122.7 MB). Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 145.9 MB). Peak memory consumption was 496.3 MB. Max. memory is 7.1 GB. [2018-10-04 09:29:48,016 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 09:29:48,017 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.40 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 09:29:48,017 INFO L168 Benchmark]: Boogie Preprocessor took 20.99 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 09:29:48,017 INFO L168 Benchmark]: RCFGBuilder took 277.44 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-04 09:29:48,018 INFO L168 Benchmark]: TraceAbstraction took 237053.08 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -122.7 MB). Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 124.7 MB). Peak memory consumption was 475.2 MB. Max. memory is 7.1 GB. [2018-10-04 09:29:48,021 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 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 41.40 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 20.99 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 277.44 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 237053.08 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -122.7 MB). Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 124.7 MB). Peak memory consumption was 475.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 16]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 16). Cancelled while BasicCegarLoop was analyzing trace of length 164 with TraceHistMax 81, while TraceCheckSpWp was constructing forward predicates, while PredicateComparison was comparing new predicate (quantifier-free) to 118 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 236.9s OverallTime, 81 OverallIterations, 81 TraceHistogramMax, 19.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 162 SDtfs, 0 SDslu, 1 SDs, 0 SdLazy, 13221 SolverSat, 256 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 14.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9718 GetRequests, 3239 SyntacticMatches, 0 SemanticMatches, 6479 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341280 ImplicationChecksByTransitivity, 200.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=164occurred in iteration=80, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 80 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 3.7s SatisfiabilityAnalysisTime, 205.0s InterpolantComputationTime, 13117 NumberOfCodeBlocks, 13117 NumberOfCodeBlocksAsserted, 1771 NumberOfCheckSat, 12958 ConstructedInterpolants, 0 QuantifiedInterpolants, 8346212 SizeOfPredicates, 0 NumberOfNonLiveVariables, 13272 ConjunctsInSsa, 3397 ConjunctsInUnsatCore, 159 InterpolantComputations, 1 PerfectInterpolantSequences, 0/341280 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/LexIndexValue-Pointer-Reduced.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-04_09-29-48-030.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/LexIndexValue-Pointer-Reduced.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-04_09-29-48-030.csv Completed graceful shutdown