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/MonadicInvariant01.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-b2fde6a [2018-09-28 10:15:09,867 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-28 10:15:09,869 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-28 10:15:09,882 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-28 10:15:09,883 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-28 10:15:09,884 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-28 10:15:09,885 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-28 10:15:09,887 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-28 10:15:09,888 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-28 10:15:09,889 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-28 10:15:09,890 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-28 10:15:09,891 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-28 10:15:09,892 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-28 10:15:09,893 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-28 10:15:09,894 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-28 10:15:09,894 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-28 10:15:09,895 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-28 10:15:09,897 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-28 10:15:09,899 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-28 10:15:09,901 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-28 10:15:09,902 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-28 10:15:09,903 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-28 10:15:09,905 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-28 10:15:09,905 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-28 10:15:09,906 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-28 10:15:09,906 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-28 10:15:09,907 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-28 10:15:09,908 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-28 10:15:09,909 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-28 10:15:09,910 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-28 10:15:09,910 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-28 10:15:09,911 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-28 10:15:09,911 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-28 10:15:09,911 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-28 10:15:09,912 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-28 10:15:09,913 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-28 10:15:09,913 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-28 10:15:09,931 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-28 10:15:09,931 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-28 10:15:09,932 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-28 10:15:09,932 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-28 10:15:09,933 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-28 10:15:09,933 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-28 10:15:09,933 INFO L133 SettingsManager]: * Use SBE=true [2018-09-28 10:15:09,934 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-28 10:15:09,934 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-28 10:15:09,934 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-28 10:15:09,934 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-28 10:15:09,934 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-28 10:15:09,935 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-28 10:15:09,935 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-28 10:15:09,935 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-28 10:15:09,935 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-28 10:15:09,935 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-28 10:15:09,936 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-28 10:15:09,936 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-28 10:15:09,936 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-28 10:15:09,936 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-28 10:15:09,936 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-28 10:15:09,937 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-28 10:15:09,937 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-28 10:15:09,937 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-28 10:15:09,937 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-28 10:15:09,937 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-28 10:15:09,938 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-28 10:15:09,938 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-28 10:15:09,938 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-28 10:15:09,990 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-28 10:15:10,003 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-28 10:15:10,010 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-28 10:15:10,012 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-28 10:15:10,013 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-28 10:15:10,014 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/MonadicInvariant01.bpl [2018-09-28 10:15:10,014 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/MonadicInvariant01.bpl' [2018-09-28 10:15:10,061 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-28 10:15:10,064 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-28 10:15:10,065 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-28 10:15:10,065 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-28 10:15:10,066 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-28 10:15:10,087 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:15:10" (1/1) ... [2018-09-28 10:15:10,100 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:15:10" (1/1) ... [2018-09-28 10:15:10,105 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-28 10:15:10,105 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-28 10:15:10,105 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-28 10:15:10,107 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-28 10:15:10,108 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-28 10:15:10,108 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-28 10:15:10,109 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-28 10:15:10,120 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:15:10" (1/1) ... [2018-09-28 10:15:10,120 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:15:10" (1/1) ... [2018-09-28 10:15:10,121 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:15:10" (1/1) ... [2018-09-28 10:15:10,121 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:15:10" (1/1) ... [2018-09-28 10:15:10,123 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:15:10" (1/1) ... [2018-09-28 10:15:10,127 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:15:10" (1/1) ... [2018-09-28 10:15:10,128 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:15:10" (1/1) ... [2018-09-28 10:15:10,129 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-28 10:15:10,130 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-28 10:15:10,130 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-28 10:15:10,130 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-28 10:15:10,132 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:15:10" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-28 10:15:10,203 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-09-28 10:15:10,203 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-28 10:15:10,204 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-28 10:15:10,366 INFO L350 CfgBuilder]: Using library mode [2018-09-28 10:15:10,367 INFO L202 PluginConnector]: Adding new model MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.09 10:15:10 BoogieIcfgContainer [2018-09-28 10:15:10,367 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-28 10:15:10,368 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-28 10:15:10,370 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-28 10:15:10,373 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-28 10:15:10,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:15:10" (1/2) ... [2018-09-28 10:15:10,374 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@181102e9 and model type MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.09 10:15:10, skipping insertion in model container [2018-09-28 10:15:10,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.09 10:15:10" (2/2) ... [2018-09-28 10:15:10,377 INFO L112 eAbstractionObserver]: Analyzing ICFG MonadicInvariant01.bpl [2018-09-28 10:15:10,388 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-28 10:15:10,397 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-28 10:15:10,460 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-28 10:15:10,461 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-28 10:15:10,462 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-28 10:15:10,462 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-28 10:15:10,462 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-28 10:15:10,462 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-28 10:15:10,462 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-28 10:15:10,463 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-28 10:15:10,463 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-28 10:15:10,479 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-09-28 10:15:10,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-28 10:15:10,488 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:10,489 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-28 10:15:10,490 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:10,497 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:10,497 INFO L82 PathProgramCache]: Analyzing trace with hash 29920, now seen corresponding path program 1 times [2018-09-28 10:15:10,499 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:10,500 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:10,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:10,547 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:10,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:10,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:10,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:10,638 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-28 10:15:10,639 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-09-28 10:15:10,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-28 10:15:10,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-28 10:15:10,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-28 10:15:10,659 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-09-28 10:15:10,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:10,719 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-28 10:15:10,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-28 10:15:10,721 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-28 10:15:10,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:10,733 INFO L225 Difference]: With dead ends: 11 [2018-09-28 10:15:10,733 INFO L226 Difference]: Without dead ends: 6 [2018-09-28 10:15:10,737 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 [2018-09-28 10:15:10,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-28 10:15:10,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-28 10:15:10,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-28 10:15:10,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-28 10:15:10,804 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 3 [2018-09-28 10:15:10,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:10,804 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-28 10:15:10,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-28 10:15:10,804 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-28 10:15:10,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-28 10:15:10,805 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:10,805 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-09-28 10:15:10,806 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:10,806 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:10,806 INFO L82 PathProgramCache]: Analyzing trace with hash 28754210, now seen corresponding path program 1 times [2018-09-28 10:15:10,810 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:10,810 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:10,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:10,811 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:10,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:10,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:10,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:10,916 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:10,916 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:10,932 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:10,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:10,956 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:11,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:11,211 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:11,211 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2018-09-28 10:15:11,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-28 10:15:11,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-28 10:15:11,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-09-28 10:15:11,213 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 6 states. [2018-09-28 10:15:11,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:11,330 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-28 10:15:11,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-28 10:15:11,330 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2018-09-28 10:15:11,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:11,331 INFO L225 Difference]: With dead ends: 9 [2018-09-28 10:15:11,331 INFO L226 Difference]: Without dead ends: 8 [2018-09-28 10:15:11,332 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-09-28 10:15:11,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-28 10:15:11,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-28 10:15:11,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-28 10:15:11,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-28 10:15:11,335 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 5 [2018-09-28 10:15:11,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:11,335 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-28 10:15:11,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-28 10:15:11,335 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-28 10:15:11,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-28 10:15:11,335 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:11,336 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1] [2018-09-28 10:15:11,336 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:11,336 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:11,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1862993124, now seen corresponding path program 2 times [2018-09-28 10:15:11,336 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:11,337 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:11,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:11,338 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:11,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:11,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:11,419 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:11,419 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:11,419 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:11,437 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:15:11,477 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:15:11,478 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:11,479 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:11,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:11,703 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:11,703 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2018-09-28 10:15:11,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:15:11,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:15:11,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:15:11,705 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 8 states. [2018-09-28 10:15:11,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:11,916 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-28 10:15:11,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-28 10:15:11,916 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2018-09-28 10:15:11,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:11,917 INFO L225 Difference]: With dead ends: 11 [2018-09-28 10:15:11,917 INFO L226 Difference]: Without dead ends: 10 [2018-09-28 10:15:11,918 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 [2018-09-28 10:15:11,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-28 10:15:11,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-28 10:15:11,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-28 10:15:11,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-28 10:15:11,924 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2018-09-28 10:15:11,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:11,924 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-28 10:15:11,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:15:11,927 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-28 10:15:11,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-28 10:15:11,928 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:11,928 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1] [2018-09-28 10:15:11,928 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:11,929 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:11,929 INFO L82 PathProgramCache]: Analyzing trace with hash -664969178, now seen corresponding path program 3 times [2018-09-28 10:15:11,929 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:11,929 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:11,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:11,930 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:11,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:11,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:12,063 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:12,064 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:12,064 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:12,072 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:15:12,080 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-28 10:15:12,081 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:12,083 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:12,178 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:12,198 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:12,199 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2018-09-28 10:15:12,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:12,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:12,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:12,201 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 10 states. [2018-09-28 10:15:12,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:12,249 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-28 10:15:12,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-28 10:15:12,250 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2018-09-28 10:15:12,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:12,251 INFO L225 Difference]: With dead ends: 13 [2018-09-28 10:15:12,251 INFO L226 Difference]: Without dead ends: 12 [2018-09-28 10:15:12,252 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:12,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-28 10:15:12,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-28 10:15:12,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-28 10:15:12,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-28 10:15:12,255 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2018-09-28 10:15:12,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:12,256 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-28 10:15:12,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:12,256 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-28 10:15:12,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-28 10:15:12,257 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:12,257 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1] [2018-09-28 10:15:12,257 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:12,257 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:12,257 INFO L82 PathProgramCache]: Analyzing trace with hash 914748136, now seen corresponding path program 4 times [2018-09-28 10:15:12,258 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:12,258 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:12,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:12,259 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:12,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:12,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:12,358 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:12,359 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:12,359 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:12,372 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:15:12,384 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:15:12,385 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:12,387 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:12,545 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:12,566 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:12,566 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2018-09-28 10:15:12,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-28 10:15:12,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-28 10:15:12,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2018-09-28 10:15:12,568 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 12 states. [2018-09-28 10:15:12,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:12,731 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-28 10:15:12,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-28 10:15:12,731 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2018-09-28 10:15:12,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:12,732 INFO L225 Difference]: With dead ends: 15 [2018-09-28 10:15:12,732 INFO L226 Difference]: Without dead ends: 14 [2018-09-28 10:15:12,733 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 [2018-09-28 10:15:12,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-28 10:15:12,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-28 10:15:12,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-28 10:15:12,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-28 10:15:12,737 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2018-09-28 10:15:12,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:12,737 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-28 10:15:12,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-28 10:15:12,737 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-28 10:15:12,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:15:12,738 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:12,738 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1] [2018-09-28 10:15:12,738 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:12,739 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:12,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1395335894, now seen corresponding path program 5 times [2018-09-28 10:15:12,739 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:12,739 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:12,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:12,740 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:12,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:12,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:13,135 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:13,136 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:13,136 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:13,151 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:15:13,204 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-28 10:15:13,205 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:13,206 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:13,395 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:13,416 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:13,416 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2018-09-28 10:15:13,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-28 10:15:13,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-28 10:15:13,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2018-09-28 10:15:13,417 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 14 states. [2018-09-28 10:15:13,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:13,502 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-28 10:15:13,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:15:13,502 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-09-28 10:15:13,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:13,503 INFO L225 Difference]: With dead ends: 17 [2018-09-28 10:15:13,503 INFO L226 Difference]: Without dead ends: 16 [2018-09-28 10:15:13,504 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2018-09-28 10:15:13,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-28 10:15:13,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-28 10:15:13,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-28 10:15:13,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-28 10:15:13,508 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2018-09-28 10:15:13,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:13,508 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-28 10:15:13,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-28 10:15:13,509 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-28 10:15:13,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:15:13,509 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:13,509 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1] [2018-09-28 10:15:13,510 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:13,510 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:13,510 INFO L82 PathProgramCache]: Analyzing trace with hash -887996692, now seen corresponding path program 6 times [2018-09-28 10:15:13,510 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:13,510 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:13,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:13,511 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:13,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:13,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:13,633 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:13,634 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:13,634 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:13,642 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:15:13,655 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-28 10:15:13,656 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:13,658 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:13,810 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:13,836 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:13,836 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2018-09-28 10:15:13,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-28 10:15:13,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-28 10:15:13,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2018-09-28 10:15:13,838 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 16 states. [2018-09-28 10:15:13,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:13,887 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-28 10:15:13,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:15:13,887 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 15 [2018-09-28 10:15:13,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:13,889 INFO L225 Difference]: With dead ends: 19 [2018-09-28 10:15:13,889 INFO L226 Difference]: Without dead ends: 18 [2018-09-28 10:15:13,890 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 [2018-09-28 10:15:13,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-28 10:15:13,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-28 10:15:13,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-28 10:15:13,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-09-28 10:15:13,895 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2018-09-28 10:15:13,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:13,895 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-09-28 10:15:13,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-28 10:15:13,896 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-09-28 10:15:13,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:13,896 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:13,896 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1] [2018-09-28 10:15:13,897 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:13,897 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:13,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1333671982, now seen corresponding path program 7 times [2018-09-28 10:15:13,897 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:13,897 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:13,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:13,898 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:13,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:13,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:14,071 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:14,072 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:14,072 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:14,083 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:14,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:14,093 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:14,375 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:14,396 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:14,397 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2018-09-28 10:15:14,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-28 10:15:14,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-28 10:15:14,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-09-28 10:15:14,398 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 18 states. [2018-09-28 10:15:14,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:14,457 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-28 10:15:14,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:14,457 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 17 [2018-09-28 10:15:14,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:14,458 INFO L225 Difference]: With dead ends: 21 [2018-09-28 10:15:14,458 INFO L226 Difference]: Without dead ends: 20 [2018-09-28 10:15:14,459 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-09-28 10:15:14,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-28 10:15:14,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-28 10:15:14,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-28 10:15:14,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-09-28 10:15:14,463 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2018-09-28 10:15:14,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:14,463 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-09-28 10:15:14,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-28 10:15:14,464 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-09-28 10:15:14,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:15:14,464 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:14,465 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1] [2018-09-28 10:15:14,465 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:14,465 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:14,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1758521584, now seen corresponding path program 8 times [2018-09-28 10:15:14,465 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:14,465 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:14,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:14,466 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:14,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:14,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:14,608 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:14,609 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:14,609 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:14,618 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:15:14,630 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:15:14,630 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:14,633 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:14,786 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:14,806 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:14,807 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2018-09-28 10:15:14,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-28 10:15:14,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-28 10:15:14,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2018-09-28 10:15:14,809 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 20 states. [2018-09-28 10:15:14,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:14,882 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-28 10:15:14,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:15:14,884 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 19 [2018-09-28 10:15:14,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:14,885 INFO L225 Difference]: With dead ends: 23 [2018-09-28 10:15:14,885 INFO L226 Difference]: Without dead ends: 22 [2018-09-28 10:15:14,886 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 [2018-09-28 10:15:14,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-28 10:15:14,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-28 10:15:14,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-28 10:15:14,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-09-28 10:15:14,889 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2018-09-28 10:15:14,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:14,890 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-09-28 10:15:14,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-28 10:15:14,890 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-09-28 10:15:14,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-28 10:15:14,891 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:14,891 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1] [2018-09-28 10:15:14,891 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:14,891 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:14,892 INFO L82 PathProgramCache]: Analyzing trace with hash 2017095986, now seen corresponding path program 9 times [2018-09-28 10:15:14,892 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:14,892 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:14,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:14,893 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:14,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:14,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:15,073 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:15,074 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:15,074 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:15,082 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:15:15,124 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-09-28 10:15:15,124 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:15,126 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:15,293 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:15,313 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:15,314 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2018-09-28 10:15:15,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-28 10:15:15,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-28 10:15:15,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=276, Unknown=0, NotChecked=0, Total=462 [2018-09-28 10:15:15,315 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 22 states. [2018-09-28 10:15:15,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:15,590 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-28 10:15:15,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-28 10:15:15,590 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2018-09-28 10:15:15,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:15,591 INFO L225 Difference]: With dead ends: 25 [2018-09-28 10:15:15,594 INFO L226 Difference]: Without dead ends: 24 [2018-09-28 10:15:15,595 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=186, Invalid=276, Unknown=0, NotChecked=0, Total=462 [2018-09-28 10:15:15,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-28 10:15:15,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-28 10:15:15,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-28 10:15:15,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-09-28 10:15:15,602 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2018-09-28 10:15:15,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:15,602 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-09-28 10:15:15,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-28 10:15:15,602 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-09-28 10:15:15,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-28 10:15:15,603 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:15,603 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1] [2018-09-28 10:15:15,604 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:15,604 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:15,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1398993140, now seen corresponding path program 10 times [2018-09-28 10:15:15,605 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:15,605 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:15,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:15,606 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:15,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:15,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:15,810 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:15,810 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:15,811 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:15,819 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:15:15,830 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:15:15,830 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:15,832 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:16,057 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:16,078 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:16,078 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2018-09-28 10:15:16,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-28 10:15:16,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-28 10:15:16,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=331, Unknown=0, NotChecked=0, Total=552 [2018-09-28 10:15:16,080 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 24 states. [2018-09-28 10:15:16,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:16,142 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-28 10:15:16,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-28 10:15:16,142 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 23 [2018-09-28 10:15:16,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:16,144 INFO L225 Difference]: With dead ends: 27 [2018-09-28 10:15:16,144 INFO L226 Difference]: Without dead ends: 26 [2018-09-28 10:15:16,145 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=221, Invalid=331, Unknown=0, NotChecked=0, Total=552 [2018-09-28 10:15:16,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-28 10:15:16,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-28 10:15:16,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:15:16,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-09-28 10:15:16,150 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 23 [2018-09-28 10:15:16,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:16,151 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-09-28 10:15:16,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-28 10:15:16,151 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-09-28 10:15:16,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-28 10:15:16,152 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:16,152 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1] [2018-09-28 10:15:16,152 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:16,152 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:16,152 INFO L82 PathProgramCache]: Analyzing trace with hash 107644982, now seen corresponding path program 11 times [2018-09-28 10:15:16,153 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:16,153 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:16,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:16,154 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:16,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:16,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:16,314 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:16,314 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:16,314 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:16,326 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:15:16,339 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-09-28 10:15:16,339 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:16,341 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:16,806 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:16,827 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:16,827 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2018-09-28 10:15:16,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-28 10:15:16,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-28 10:15:16,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2018-09-28 10:15:16,829 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 26 states. [2018-09-28 10:15:16,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:16,927 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-28 10:15:16,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-28 10:15:16,928 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 25 [2018-09-28 10:15:16,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:16,929 INFO L225 Difference]: With dead ends: 29 [2018-09-28 10:15:16,929 INFO L226 Difference]: Without dead ends: 28 [2018-09-28 10:15:16,930 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 [2018-09-28 10:15:16,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-28 10:15:16,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-28 10:15:16,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:15:16,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-09-28 10:15:16,935 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 25 [2018-09-28 10:15:16,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:16,935 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-09-28 10:15:16,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-28 10:15:16,935 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-09-28 10:15:16,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-28 10:15:16,936 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:16,936 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1] [2018-09-28 10:15:16,936 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:16,936 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:16,936 INFO L82 PathProgramCache]: Analyzing trace with hash 367613688, now seen corresponding path program 12 times [2018-09-28 10:15:16,937 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:16,937 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:16,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:16,938 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:16,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:16,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:17,201 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:17,201 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:17,201 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:17,216 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:15:17,268 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-28 10:15:17,268 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:17,270 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:17,572 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:17,593 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:17,593 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 26 [2018-09-28 10:15:17,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-28 10:15:17,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-28 10:15:17,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=456, Unknown=0, NotChecked=0, Total=756 [2018-09-28 10:15:17,595 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 28 states. [2018-09-28 10:15:17,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:17,695 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-28 10:15:17,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-28 10:15:17,695 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 27 [2018-09-28 10:15:17,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:17,696 INFO L225 Difference]: With dead ends: 31 [2018-09-28 10:15:17,696 INFO L226 Difference]: Without dead ends: 30 [2018-09-28 10:15:17,697 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 [2018-09-28 10:15:17,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-28 10:15:17,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-28 10:15:17,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:15:17,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-09-28 10:15:17,701 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 27 [2018-09-28 10:15:17,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:17,701 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-09-28 10:15:17,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-28 10:15:17,701 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-09-28 10:15:17,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-28 10:15:17,702 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:17,702 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1] [2018-09-28 10:15:17,702 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:17,703 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:17,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1089436986, now seen corresponding path program 13 times [2018-09-28 10:15:17,703 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:17,703 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:17,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:17,704 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:17,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:17,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:17,969 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:17,969 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:17,970 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:17,980 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:17,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:17,993 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:18,237 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:18,257 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:18,257 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2018-09-28 10:15:18,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-28 10:15:18,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-28 10:15:18,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=526, Unknown=0, NotChecked=0, Total=870 [2018-09-28 10:15:18,258 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 30 states. [2018-09-28 10:15:18,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:18,339 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-28 10:15:18,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-28 10:15:18,340 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 29 [2018-09-28 10:15:18,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:18,340 INFO L225 Difference]: With dead ends: 33 [2018-09-28 10:15:18,340 INFO L226 Difference]: Without dead ends: 32 [2018-09-28 10:15:18,341 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 [2018-09-28 10:15:18,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-28 10:15:18,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-28 10:15:18,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:15:18,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-09-28 10:15:18,346 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 29 [2018-09-28 10:15:18,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:18,346 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-09-28 10:15:18,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-28 10:15:18,347 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-09-28 10:15:18,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-28 10:15:18,347 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:18,348 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1] [2018-09-28 10:15:18,348 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:18,348 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:18,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1023075588, now seen corresponding path program 14 times [2018-09-28 10:15:18,348 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:18,348 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:18,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:18,349 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:18,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:18,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:18,559 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:18,560 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:18,560 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:18,570 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:15:18,583 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:15:18,583 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:18,585 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:18,889 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:18,910 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:18,910 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2018-09-28 10:15:18,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-28 10:15:18,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-28 10:15:18,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=601, Unknown=0, NotChecked=0, Total=992 [2018-09-28 10:15:18,912 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 32 states. [2018-09-28 10:15:19,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:19,048 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-28 10:15:19,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-28 10:15:19,049 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 31 [2018-09-28 10:15:19,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:19,050 INFO L225 Difference]: With dead ends: 35 [2018-09-28 10:15:19,050 INFO L226 Difference]: Without dead ends: 34 [2018-09-28 10:15:19,051 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 [2018-09-28 10:15:19,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-28 10:15:19,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-28 10:15:19,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:15:19,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-09-28 10:15:19,055 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 31 [2018-09-28 10:15:19,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:19,056 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-09-28 10:15:19,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-28 10:15:19,056 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-09-28 10:15:19,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-28 10:15:19,057 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:19,057 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1] [2018-09-28 10:15:19,057 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:19,057 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:19,057 INFO L82 PathProgramCache]: Analyzing trace with hash 371871806, now seen corresponding path program 15 times [2018-09-28 10:15:19,058 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:19,058 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:19,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:19,059 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:19,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:19,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:19,276 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:19,277 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:19,277 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:19,284 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:15:19,476 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-09-28 10:15:19,477 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:19,479 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:19,895 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:19,916 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:19,916 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 32 [2018-09-28 10:15:19,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-28 10:15:19,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-28 10:15:19,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=681, Unknown=0, NotChecked=0, Total=1122 [2018-09-28 10:15:19,918 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 34 states. [2018-09-28 10:15:20,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:20,034 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-28 10:15:20,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-28 10:15:20,035 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 33 [2018-09-28 10:15:20,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:20,036 INFO L225 Difference]: With dead ends: 37 [2018-09-28 10:15:20,036 INFO L226 Difference]: Without dead ends: 36 [2018-09-28 10:15:20,037 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=441, Invalid=681, Unknown=0, NotChecked=0, Total=1122 [2018-09-28 10:15:20,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-28 10:15:20,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-28 10:15:20,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-28 10:15:20,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-09-28 10:15:20,042 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 33 [2018-09-28 10:15:20,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:20,043 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-09-28 10:15:20,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-28 10:15:20,043 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-09-28 10:15:20,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-28 10:15:20,044 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:20,044 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1] [2018-09-28 10:15:20,044 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:20,044 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:20,044 INFO L82 PathProgramCache]: Analyzing trace with hash 886521088, now seen corresponding path program 16 times [2018-09-28 10:15:20,045 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:20,045 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:20,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:20,045 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:20,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:20,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:20,372 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:20,372 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:20,372 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:20,381 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:15:20,391 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:15:20,391 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:20,393 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:20,673 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:20,694 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:20,694 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 34 [2018-09-28 10:15:20,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-28 10:15:20,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-28 10:15:20,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=494, Invalid=766, Unknown=0, NotChecked=0, Total=1260 [2018-09-28 10:15:20,696 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 36 states. [2018-09-28 10:15:20,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:20,775 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-28 10:15:20,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-28 10:15:20,776 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 35 [2018-09-28 10:15:20,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:20,776 INFO L225 Difference]: With dead ends: 39 [2018-09-28 10:15:20,776 INFO L226 Difference]: Without dead ends: 38 [2018-09-28 10:15:20,778 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=494, Invalid=766, Unknown=0, NotChecked=0, Total=1260 [2018-09-28 10:15:20,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-28 10:15:20,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-28 10:15:20,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-28 10:15:20,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-09-28 10:15:20,782 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 35 [2018-09-28 10:15:20,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:20,782 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-09-28 10:15:20,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-28 10:15:20,782 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-09-28 10:15:20,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-28 10:15:20,783 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:20,783 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1] [2018-09-28 10:15:20,783 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:20,783 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:20,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1543242050, now seen corresponding path program 17 times [2018-09-28 10:15:20,784 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:20,784 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:20,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:20,784 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:20,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:20,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:21,046 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:21,046 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:21,046 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:21,055 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:15:21,072 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-28 10:15:21,073 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:21,075 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:21,569 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:21,589 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:21,589 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 36 [2018-09-28 10:15:21,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-28 10:15:21,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-28 10:15:21,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=550, Invalid=856, Unknown=0, NotChecked=0, Total=1406 [2018-09-28 10:15:21,591 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 38 states. [2018-09-28 10:15:21,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:21,813 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-28 10:15:21,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-28 10:15:21,814 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 37 [2018-09-28 10:15:21,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:21,815 INFO L225 Difference]: With dead ends: 41 [2018-09-28 10:15:21,815 INFO L226 Difference]: Without dead ends: 40 [2018-09-28 10:15:21,816 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=550, Invalid=856, Unknown=0, NotChecked=0, Total=1406 [2018-09-28 10:15:21,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-28 10:15:21,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-28 10:15:21,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-28 10:15:21,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-09-28 10:15:21,821 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 37 [2018-09-28 10:15:21,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:21,821 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-09-28 10:15:21,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-28 10:15:21,821 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-09-28 10:15:21,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-28 10:15:21,822 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:21,822 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1] [2018-09-28 10:15:21,823 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:21,823 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:21,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1291894020, now seen corresponding path program 18 times [2018-09-28 10:15:21,823 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:21,823 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:21,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:21,824 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:21,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:21,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:22,359 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:22,359 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:22,359 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:22,366 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:15:22,382 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-28 10:15:22,382 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:22,384 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:23,111 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:23,131 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:23,132 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 38 [2018-09-28 10:15:23,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-28 10:15:23,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-28 10:15:23,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=609, Invalid=951, Unknown=0, NotChecked=0, Total=1560 [2018-09-28 10:15:23,133 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 40 states. [2018-09-28 10:15:23,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:23,216 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-28 10:15:23,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-28 10:15:23,216 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 39 [2018-09-28 10:15:23,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:23,217 INFO L225 Difference]: With dead ends: 43 [2018-09-28 10:15:23,218 INFO L226 Difference]: Without dead ends: 42 [2018-09-28 10:15:23,219 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 [2018-09-28 10:15:23,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-28 10:15:23,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-28 10:15:23,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-28 10:15:23,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-09-28 10:15:23,222 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 39 [2018-09-28 10:15:23,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:23,223 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-09-28 10:15:23,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-28 10:15:23,223 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-09-28 10:15:23,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-28 10:15:23,223 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:23,223 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1] [2018-09-28 10:15:23,224 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:23,224 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:23,224 INFO L82 PathProgramCache]: Analyzing trace with hash 264605766, now seen corresponding path program 19 times [2018-09-28 10:15:23,224 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:23,224 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:23,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:23,225 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:23,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:23,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:23,490 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:23,490 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:23,490 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:23,498 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:23,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:23,515 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:24,059 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:24,079 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:24,080 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 40 [2018-09-28 10:15:24,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-28 10:15:24,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-28 10:15:24,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=1051, Unknown=0, NotChecked=0, Total=1722 [2018-09-28 10:15:24,081 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 42 states. [2018-09-28 10:15:24,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:24,222 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-28 10:15:24,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-28 10:15:24,222 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 41 [2018-09-28 10:15:24,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:24,223 INFO L225 Difference]: With dead ends: 45 [2018-09-28 10:15:24,223 INFO L226 Difference]: Without dead ends: 44 [2018-09-28 10:15:24,224 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=671, Invalid=1051, Unknown=0, NotChecked=0, Total=1722 [2018-09-28 10:15:24,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-28 10:15:24,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-28 10:15:24,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-28 10:15:24,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-09-28 10:15:24,229 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 41 [2018-09-28 10:15:24,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:24,229 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-09-28 10:15:24,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-28 10:15:24,230 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-09-28 10:15:24,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-28 10:15:24,230 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:24,230 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1] [2018-09-28 10:15:24,231 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:24,231 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:24,231 INFO L82 PathProgramCache]: Analyzing trace with hash 883071752, now seen corresponding path program 20 times [2018-09-28 10:15:24,231 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:24,231 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:24,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:24,232 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:24,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:24,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:24,612 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:24,612 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:24,613 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:24,620 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:15:24,634 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:15:24,634 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:24,637 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:24,959 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:24,981 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:24,981 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 42 [2018-09-28 10:15:24,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-28 10:15:24,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-28 10:15:24,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=736, Invalid=1156, Unknown=0, NotChecked=0, Total=1892 [2018-09-28 10:15:24,983 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 44 states. [2018-09-28 10:15:25,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:25,081 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-28 10:15:25,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-28 10:15:25,082 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 43 [2018-09-28 10:15:25,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:25,082 INFO L225 Difference]: With dead ends: 47 [2018-09-28 10:15:25,083 INFO L226 Difference]: Without dead ends: 46 [2018-09-28 10:15:25,084 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=736, Invalid=1156, Unknown=0, NotChecked=0, Total=1892 [2018-09-28 10:15:25,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-28 10:15:25,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-28 10:15:25,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-28 10:15:25,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-09-28 10:15:25,089 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 43 [2018-09-28 10:15:25,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:25,089 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-09-28 10:15:25,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-28 10:15:25,090 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-09-28 10:15:25,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-28 10:15:25,090 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:25,091 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1] [2018-09-28 10:15:25,091 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:25,091 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:25,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1771569846, now seen corresponding path program 21 times [2018-09-28 10:15:25,091 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:25,091 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:25,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:25,092 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:25,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:25,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:25,962 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:25,962 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:25,962 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:25,971 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:15:25,992 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-09-28 10:15:25,992 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:25,995 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:26,548 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:26,569 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:26,570 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 44 [2018-09-28 10:15:26,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-28 10:15:26,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-28 10:15:26,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=804, Invalid=1266, Unknown=0, NotChecked=0, Total=2070 [2018-09-28 10:15:26,571 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 46 states. [2018-09-28 10:15:26,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:26,698 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-28 10:15:26,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-28 10:15:26,702 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 45 [2018-09-28 10:15:26,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:26,703 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:15:26,703 INFO L226 Difference]: Without dead ends: 48 [2018-09-28 10:15:26,704 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=804, Invalid=1266, Unknown=0, NotChecked=0, Total=2070 [2018-09-28 10:15:26,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-28 10:15:26,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-09-28 10:15:26,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-28 10:15:26,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-09-28 10:15:26,708 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 45 [2018-09-28 10:15:26,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:26,709 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-09-28 10:15:26,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-28 10:15:26,709 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-09-28 10:15:26,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-28 10:15:26,710 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:26,710 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1] [2018-09-28 10:15:26,710 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:26,710 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:26,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1671571700, now seen corresponding path program 22 times [2018-09-28 10:15:26,710 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:26,710 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:26,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:26,711 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:26,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:26,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:27,063 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:27,064 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:27,064 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:27,072 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:15:27,084 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:15:27,085 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:27,088 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:27,628 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:27,650 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:27,650 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2018-09-28 10:15:27,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-28 10:15:27,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-28 10:15:27,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=875, Invalid=1381, Unknown=0, NotChecked=0, Total=2256 [2018-09-28 10:15:27,652 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 48 states. [2018-09-28 10:15:27,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:27,774 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-28 10:15:27,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-28 10:15:27,774 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 47 [2018-09-28 10:15:27,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:27,775 INFO L225 Difference]: With dead ends: 51 [2018-09-28 10:15:27,775 INFO L226 Difference]: Without dead ends: 50 [2018-09-28 10:15:27,776 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=875, Invalid=1381, Unknown=0, NotChecked=0, Total=2256 [2018-09-28 10:15:27,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-28 10:15:27,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-28 10:15:27,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-28 10:15:27,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-09-28 10:15:27,780 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 47 [2018-09-28 10:15:27,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:27,780 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-09-28 10:15:27,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-28 10:15:27,781 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-09-28 10:15:27,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-28 10:15:27,781 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:27,781 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1] [2018-09-28 10:15:27,782 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:27,782 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:27,782 INFO L82 PathProgramCache]: Analyzing trace with hash -62633906, now seen corresponding path program 23 times [2018-09-28 10:15:27,782 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:27,782 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:27,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:27,783 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:27,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:27,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:28,609 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:28,609 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:28,609 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:28,617 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:15:28,637 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-09-28 10:15:28,637 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:28,639 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:29,109 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:29,129 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:29,129 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 48 [2018-09-28 10:15:29,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-28 10:15:29,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-28 10:15:29,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=949, Invalid=1501, Unknown=0, NotChecked=0, Total=2450 [2018-09-28 10:15:29,131 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 50 states. [2018-09-28 10:15:29,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:29,252 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-28 10:15:29,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-28 10:15:29,252 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 49 [2018-09-28 10:15:29,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:29,253 INFO L225 Difference]: With dead ends: 53 [2018-09-28 10:15:29,253 INFO L226 Difference]: Without dead ends: 52 [2018-09-28 10:15:29,255 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=949, Invalid=1501, Unknown=0, NotChecked=0, Total=2450 [2018-09-28 10:15:29,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-28 10:15:29,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-28 10:15:29,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-28 10:15:29,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-09-28 10:15:29,259 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 49 [2018-09-28 10:15:29,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:29,260 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-09-28 10:15:29,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-28 10:15:29,260 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-09-28 10:15:29,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-28 10:15:29,261 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:29,261 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1] [2018-09-28 10:15:29,261 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:29,261 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:29,261 INFO L82 PathProgramCache]: Analyzing trace with hash -61640432, now seen corresponding path program 24 times [2018-09-28 10:15:29,262 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:29,262 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:29,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:29,262 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:29,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:29,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:29,627 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:29,628 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:29,628 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:29,635 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:15:29,657 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-28 10:15:29,657 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:29,659 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:30,097 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:30,117 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:30,117 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 50 [2018-09-28 10:15:30,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-28 10:15:30,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-28 10:15:30,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1026, Invalid=1626, Unknown=0, NotChecked=0, Total=2652 [2018-09-28 10:15:30,119 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 52 states. [2018-09-28 10:15:30,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:30,278 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-28 10:15:30,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-28 10:15:30,278 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 51 [2018-09-28 10:15:30,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:30,279 INFO L225 Difference]: With dead ends: 55 [2018-09-28 10:15:30,279 INFO L226 Difference]: Without dead ends: 54 [2018-09-28 10:15:30,280 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 [2018-09-28 10:15:30,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-28 10:15:30,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-09-28 10:15:30,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-28 10:15:30,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-09-28 10:15:30,283 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 51 [2018-09-28 10:15:30,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:30,283 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-09-28 10:15:30,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-28 10:15:30,283 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-09-28 10:15:30,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-28 10:15:30,284 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:30,284 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1] [2018-09-28 10:15:30,284 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:30,285 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:30,285 INFO L82 PathProgramCache]: Analyzing trace with hash 893088082, now seen corresponding path program 25 times [2018-09-28 10:15:30,285 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:30,285 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:30,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:30,286 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:30,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:30,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:30,699 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:30,700 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:30,700 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:30,707 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:30,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:30,723 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:31,179 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:31,199 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:31,199 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 52 [2018-09-28 10:15:31,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-28 10:15:31,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-28 10:15:31,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1106, Invalid=1756, Unknown=0, NotChecked=0, Total=2862 [2018-09-28 10:15:31,201 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 54 states. [2018-09-28 10:15:31,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:31,322 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-28 10:15:31,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-28 10:15:31,329 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 53 [2018-09-28 10:15:31,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:31,329 INFO L225 Difference]: With dead ends: 57 [2018-09-28 10:15:31,329 INFO L226 Difference]: Without dead ends: 56 [2018-09-28 10:15:31,331 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 [2018-09-28 10:15:31,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-28 10:15:31,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-28 10:15:31,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-28 10:15:31,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-09-28 10:15:31,338 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 53 [2018-09-28 10:15:31,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:31,338 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-09-28 10:15:31,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-28 10:15:31,338 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-09-28 10:15:31,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-28 10:15:31,339 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:31,339 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1] [2018-09-28 10:15:31,339 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:31,339 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:31,339 INFO L82 PathProgramCache]: Analyzing trace with hash -735811308, now seen corresponding path program 26 times [2018-09-28 10:15:31,340 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:31,340 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:31,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:31,340 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:31,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:31,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:31,828 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:31,828 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:31,828 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:31,838 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:15:31,853 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:15:31,854 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:31,856 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:32,420 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:32,441 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:32,442 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 54 [2018-09-28 10:15:32,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-28 10:15:32,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-28 10:15:32,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1189, Invalid=1891, Unknown=0, NotChecked=0, Total=3080 [2018-09-28 10:15:32,444 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 56 states. [2018-09-28 10:15:32,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:32,585 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-28 10:15:32,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-28 10:15:32,585 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 55 [2018-09-28 10:15:32,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:32,586 INFO L225 Difference]: With dead ends: 59 [2018-09-28 10:15:32,586 INFO L226 Difference]: Without dead ends: 58 [2018-09-28 10:15:32,588 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1404 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1189, Invalid=1891, Unknown=0, NotChecked=0, Total=3080 [2018-09-28 10:15:32,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-28 10:15:32,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-28 10:15:32,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-28 10:15:32,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-09-28 10:15:32,592 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 55 [2018-09-28 10:15:32,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:32,592 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-09-28 10:15:32,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-28 10:15:32,593 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-09-28 10:15:32,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-28 10:15:32,593 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:32,593 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1] [2018-09-28 10:15:32,594 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:32,594 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:32,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1554937942, now seen corresponding path program 27 times [2018-09-28 10:15:32,594 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:32,594 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:32,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:32,595 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:32,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:32,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:33,335 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:33,336 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:33,336 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:33,345 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:15:33,369 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-09-28 10:15:33,369 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:33,370 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:33,850 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:33,870 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:33,870 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 56 [2018-09-28 10:15:33,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-28 10:15:33,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-28 10:15:33,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=2031, Unknown=0, NotChecked=0, Total=3306 [2018-09-28 10:15:33,872 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 58 states. [2018-09-28 10:15:34,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:34,035 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-28 10:15:34,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-28 10:15:34,036 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 57 [2018-09-28 10:15:34,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:34,036 INFO L225 Difference]: With dead ends: 61 [2018-09-28 10:15:34,037 INFO L226 Difference]: Without dead ends: 60 [2018-09-28 10:15:34,038 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1512 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1275, Invalid=2031, Unknown=0, NotChecked=0, Total=3306 [2018-09-28 10:15:34,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-09-28 10:15:34,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-09-28 10:15:34,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-28 10:15:34,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-09-28 10:15:34,041 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 57 [2018-09-28 10:15:34,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:34,041 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-09-28 10:15:34,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-28 10:15:34,041 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-09-28 10:15:34,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-28 10:15:34,042 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:34,042 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1] [2018-09-28 10:15:34,042 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:34,042 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:34,043 INFO L82 PathProgramCache]: Analyzing trace with hash -353255656, now seen corresponding path program 28 times [2018-09-28 10:15:34,043 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:34,043 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:34,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:34,044 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:34,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:34,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:34,493 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:34,494 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:34,494 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) [2018-09-28 10:15:34,509 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:34,543 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:15:34,543 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:34,546 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:35,968 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:35,988 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:35,988 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 58 [2018-09-28 10:15:35,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-28 10:15:35,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-28 10:15:35,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1364, Invalid=2176, Unknown=0, NotChecked=0, Total=3540 [2018-09-28 10:15:35,990 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 60 states. [2018-09-28 10:15:36,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:36,195 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-28 10:15:36,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-28 10:15:36,195 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 59 [2018-09-28 10:15:36,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:36,196 INFO L225 Difference]: With dead ends: 63 [2018-09-28 10:15:36,196 INFO L226 Difference]: Without dead ends: 62 [2018-09-28 10:15:36,197 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1624 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1364, Invalid=2176, Unknown=0, NotChecked=0, Total=3540 [2018-09-28 10:15:36,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-09-28 10:15:36,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-09-28 10:15:36,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-28 10:15:36,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-09-28 10:15:36,201 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 59 [2018-09-28 10:15:36,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:36,201 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-09-28 10:15:36,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-28 10:15:36,202 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-09-28 10:15:36,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-09-28 10:15:36,202 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:36,202 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1] [2018-09-28 10:15:36,202 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:36,203 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:36,203 INFO L82 PathProgramCache]: Analyzing trace with hash -176267942, now seen corresponding path program 29 times [2018-09-28 10:15:36,203 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:36,203 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:36,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:36,204 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:36,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:36,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:36,726 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:36,726 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:36,726 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:36,734 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:15:36,759 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-09-28 10:15:36,760 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:36,761 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:37,368 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:37,388 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:37,389 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 60 [2018-09-28 10:15:37,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-28 10:15:37,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-28 10:15:37,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1456, Invalid=2326, Unknown=0, NotChecked=0, Total=3782 [2018-09-28 10:15:37,390 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 62 states. [2018-09-28 10:15:37,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:37,556 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-28 10:15:37,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-28 10:15:37,556 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 61 [2018-09-28 10:15:37,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:37,557 INFO L225 Difference]: With dead ends: 65 [2018-09-28 10:15:37,557 INFO L226 Difference]: Without dead ends: 64 [2018-09-28 10:15:37,559 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 [2018-09-28 10:15:37,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-28 10:15:37,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-09-28 10:15:37,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-28 10:15:37,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-09-28 10:15:37,562 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 61 [2018-09-28 10:15:37,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:37,563 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-09-28 10:15:37,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-28 10:15:37,563 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-09-28 10:15:37,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-28 10:15:37,563 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:37,563 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1] [2018-09-28 10:15:37,563 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:37,564 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:37,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1889766628, now seen corresponding path program 30 times [2018-09-28 10:15:37,564 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:37,564 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:37,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:37,565 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:37,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:37,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:38,507 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:38,507 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:38,507 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:38,543 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:15:38,594 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-28 10:15:38,594 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:38,596 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:39,221 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:39,241 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:39,241 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 62 [2018-09-28 10:15:39,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-28 10:15:39,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-28 10:15:39,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1551, Invalid=2481, Unknown=0, NotChecked=0, Total=4032 [2018-09-28 10:15:39,243 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 64 states. [2018-09-28 10:15:39,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:39,360 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-28 10:15:39,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-28 10:15:39,361 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 63 [2018-09-28 10:15:39,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:39,362 INFO L225 Difference]: With dead ends: 67 [2018-09-28 10:15:39,362 INFO L226 Difference]: Without dead ends: 66 [2018-09-28 10:15:39,363 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1860 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1551, Invalid=2481, Unknown=0, NotChecked=0, Total=4032 [2018-09-28 10:15:39,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-28 10:15:39,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-09-28 10:15:39,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-28 10:15:39,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-09-28 10:15:39,367 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 63 [2018-09-28 10:15:39,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:39,367 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-09-28 10:15:39,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-28 10:15:39,367 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-09-28 10:15:39,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-28 10:15:39,368 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:39,368 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1] [2018-09-28 10:15:39,368 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:39,369 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:39,369 INFO L82 PathProgramCache]: Analyzing trace with hash 705437790, now seen corresponding path program 31 times [2018-09-28 10:15:39,369 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:39,369 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:39,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:39,370 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:39,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:39,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:39,972 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:39,972 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:39,972 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:39,980 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:39,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:39,999 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:40,628 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:40,648 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:40,648 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 64 [2018-09-28 10:15:40,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-28 10:15:40,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-28 10:15:40,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1649, Invalid=2641, Unknown=0, NotChecked=0, Total=4290 [2018-09-28 10:15:40,650 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 66 states. [2018-09-28 10:15:40,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:40,807 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-28 10:15:40,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-28 10:15:40,807 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 65 [2018-09-28 10:15:40,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:40,808 INFO L225 Difference]: With dead ends: 69 [2018-09-28 10:15:40,809 INFO L226 Difference]: Without dead ends: 68 [2018-09-28 10:15:40,810 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 [2018-09-28 10:15:40,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-28 10:15:40,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-09-28 10:15:40,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-28 10:15:40,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-09-28 10:15:40,813 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 65 [2018-09-28 10:15:40,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:40,814 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-09-28 10:15:40,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-28 10:15:40,814 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-09-28 10:15:40,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-09-28 10:15:40,815 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:40,815 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1] [2018-09-28 10:15:40,815 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:40,815 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:40,815 INFO L82 PathProgramCache]: Analyzing trace with hash -679115488, now seen corresponding path program 32 times [2018-09-28 10:15:40,815 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:40,815 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:40,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:40,816 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:40,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:40,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:41,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:41,599 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:41,599 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:41,607 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:15:41,625 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:15:41,626 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:41,627 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:42,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:42,368 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:42,368 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 66 [2018-09-28 10:15:42,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-28 10:15:42,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-28 10:15:42,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1750, Invalid=2806, Unknown=0, NotChecked=0, Total=4556 [2018-09-28 10:15:42,370 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 68 states. [2018-09-28 10:15:42,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:42,528 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-28 10:15:42,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-28 10:15:42,529 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 67 [2018-09-28 10:15:42,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:42,530 INFO L225 Difference]: With dead ends: 71 [2018-09-28 10:15:42,530 INFO L226 Difference]: Without dead ends: 70 [2018-09-28 10:15:42,531 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2112 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1750, Invalid=2806, Unknown=0, NotChecked=0, Total=4556 [2018-09-28 10:15:42,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-28 10:15:42,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-09-28 10:15:42,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-28 10:15:42,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-09-28 10:15:42,534 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 67 [2018-09-28 10:15:42,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:42,535 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-09-28 10:15:42,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-28 10:15:42,535 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-09-28 10:15:42,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-28 10:15:42,535 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:42,535 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1] [2018-09-28 10:15:42,536 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:42,536 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:42,536 INFO L82 PathProgramCache]: Analyzing trace with hash 205046114, now seen corresponding path program 33 times [2018-09-28 10:15:42,536 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:42,536 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:42,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:42,537 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:42,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:42,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:43,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:43,299 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:43,299 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:43,306 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:15:43,371 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-09-28 10:15:43,372 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:43,373 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:44,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:44,186 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:44,186 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 68 [2018-09-28 10:15:44,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-28 10:15:44,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-28 10:15:44,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1854, Invalid=2976, Unknown=0, NotChecked=0, Total=4830 [2018-09-28 10:15:44,188 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 70 states. [2018-09-28 10:15:44,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:44,395 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-28 10:15:44,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-28 10:15:44,395 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 69 [2018-09-28 10:15:44,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:44,396 INFO L225 Difference]: With dead ends: 73 [2018-09-28 10:15:44,396 INFO L226 Difference]: Without dead ends: 72 [2018-09-28 10:15:44,397 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2244 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1854, Invalid=2976, Unknown=0, NotChecked=0, Total=4830 [2018-09-28 10:15:44,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-09-28 10:15:44,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-09-28 10:15:44,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-09-28 10:15:44,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-09-28 10:15:44,401 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 69 [2018-09-28 10:15:44,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:44,401 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-09-28 10:15:44,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-28 10:15:44,401 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-09-28 10:15:44,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-09-28 10:15:44,401 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:44,401 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1] [2018-09-28 10:15:44,402 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:44,402 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:44,402 INFO L82 PathProgramCache]: Analyzing trace with hash -519178972, now seen corresponding path program 34 times [2018-09-28 10:15:44,402 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:44,402 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:44,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:44,403 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:44,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:44,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:45,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:45,027 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:45,027 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:45,034 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:15:45,055 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:15:45,055 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:45,057 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:45,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:45,801 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:45,802 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 70 [2018-09-28 10:15:45,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-28 10:15:45,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-28 10:15:45,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1961, Invalid=3151, Unknown=0, NotChecked=0, Total=5112 [2018-09-28 10:15:45,803 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 72 states. [2018-09-28 10:15:45,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:45,982 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-09-28 10:15:45,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-28 10:15:45,983 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 71 [2018-09-28 10:15:45,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:45,984 INFO L225 Difference]: With dead ends: 75 [2018-09-28 10:15:45,984 INFO L226 Difference]: Without dead ends: 74 [2018-09-28 10:15:45,984 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2380 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1961, Invalid=3151, Unknown=0, NotChecked=0, Total=5112 [2018-09-28 10:15:45,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-28 10:15:45,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-09-28 10:15:45,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-28 10:15:45,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-09-28 10:15:45,988 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 71 [2018-09-28 10:15:45,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:45,988 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-09-28 10:15:45,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-28 10:15:45,989 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-09-28 10:15:45,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-09-28 10:15:45,989 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:45,989 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1] [2018-09-28 10:15:45,989 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:45,990 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:45,990 INFO L82 PathProgramCache]: Analyzing trace with hash -714784666, now seen corresponding path program 35 times [2018-09-28 10:15:45,990 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:45,990 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:45,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:45,991 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:45,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:45,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:46,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:46,630 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:46,630 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:46,637 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:15:46,674 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-09-28 10:15:46,674 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:46,677 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:47,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:47,562 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:47,563 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 72 [2018-09-28 10:15:47,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-28 10:15:47,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-28 10:15:47,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2071, Invalid=3331, Unknown=0, NotChecked=0, Total=5402 [2018-09-28 10:15:47,564 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 74 states. [2018-09-28 10:15:47,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:47,918 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-28 10:15:47,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-28 10:15:47,918 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 73 [2018-09-28 10:15:47,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:47,919 INFO L225 Difference]: With dead ends: 77 [2018-09-28 10:15:47,919 INFO L226 Difference]: Without dead ends: 76 [2018-09-28 10:15:47,920 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2520 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2071, Invalid=3331, Unknown=0, NotChecked=0, Total=5402 [2018-09-28 10:15:47,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-09-28 10:15:47,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-09-28 10:15:47,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-28 10:15:47,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-09-28 10:15:47,924 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 73 [2018-09-28 10:15:47,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:47,924 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-09-28 10:15:47,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-28 10:15:47,924 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-09-28 10:15:47,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-09-28 10:15:47,924 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:47,924 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1] [2018-09-28 10:15:47,925 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:47,925 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:47,925 INFO L82 PathProgramCache]: Analyzing trace with hash 286704424, now seen corresponding path program 36 times [2018-09-28 10:15:47,925 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:47,925 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:47,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:47,926 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:47,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:47,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:49,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:49,106 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:49,106 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:49,127 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:15:49,160 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-28 10:15:49,161 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:49,163 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:49,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:50,013 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:50,013 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 74 [2018-09-28 10:15:50,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-28 10:15:50,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-28 10:15:50,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2184, Invalid=3516, Unknown=0, NotChecked=0, Total=5700 [2018-09-28 10:15:50,015 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 76 states. [2018-09-28 10:15:50,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:50,192 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-09-28 10:15:50,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-28 10:15:50,192 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 75 [2018-09-28 10:15:50,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:50,193 INFO L225 Difference]: With dead ends: 79 [2018-09-28 10:15:50,193 INFO L226 Difference]: Without dead ends: 78 [2018-09-28 10:15:50,194 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2664 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2184, Invalid=3516, Unknown=0, NotChecked=0, Total=5700 [2018-09-28 10:15:50,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-09-28 10:15:50,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-09-28 10:15:50,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-09-28 10:15:50,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-09-28 10:15:50,197 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 75 [2018-09-28 10:15:50,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:50,197 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-09-28 10:15:50,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-28 10:15:50,197 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-09-28 10:15:50,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-09-28 10:15:50,198 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:50,198 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1] [2018-09-28 10:15:50,198 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:50,198 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:50,199 INFO L82 PathProgramCache]: Analyzing trace with hash 645045610, now seen corresponding path program 37 times [2018-09-28 10:15:50,199 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:50,199 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:50,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:50,200 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:50,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:50,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:51,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:51,005 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:51,005 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:51,018 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:51,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:51,042 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:51,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:51,938 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:51,938 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 76 [2018-09-28 10:15:51,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-28 10:15:51,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-28 10:15:51,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2300, Invalid=3706, Unknown=0, NotChecked=0, Total=6006 [2018-09-28 10:15:51,940 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 78 states. [2018-09-28 10:15:52,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:52,099 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-28 10:15:52,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-28 10:15:52,100 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 77 [2018-09-28 10:15:52,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:52,101 INFO L225 Difference]: With dead ends: 81 [2018-09-28 10:15:52,101 INFO L226 Difference]: Without dead ends: 80 [2018-09-28 10:15:52,102 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2812 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2300, Invalid=3706, Unknown=0, NotChecked=0, Total=6006 [2018-09-28 10:15:52,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-28 10:15:52,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-09-28 10:15:52,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-28 10:15:52,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-09-28 10:15:52,105 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 77 [2018-09-28 10:15:52,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:52,106 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-09-28 10:15:52,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-28 10:15:52,106 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-09-28 10:15:52,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-09-28 10:15:52,106 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:52,106 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1] [2018-09-28 10:15:52,107 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:52,107 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:52,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1413541676, now seen corresponding path program 38 times [2018-09-28 10:15:52,107 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:52,107 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:52,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:52,108 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:52,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:52,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:52,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:52,897 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:52,897 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:52,905 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:15:52,922 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:15:52,922 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:52,925 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:54,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:54,073 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:54,073 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 78 [2018-09-28 10:15:54,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-28 10:15:54,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-28 10:15:54,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2419, Invalid=3901, Unknown=0, NotChecked=0, Total=6320 [2018-09-28 10:15:54,075 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 80 states. [2018-09-28 10:15:54,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:54,256 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-09-28 10:15:54,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-28 10:15:54,257 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 79 [2018-09-28 10:15:54,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:54,258 INFO L225 Difference]: With dead ends: 83 [2018-09-28 10:15:54,258 INFO L226 Difference]: Without dead ends: 82 [2018-09-28 10:15:54,259 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2964 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2419, Invalid=3901, Unknown=0, NotChecked=0, Total=6320 [2018-09-28 10:15:54,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-28 10:15:54,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-09-28 10:15:54,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-09-28 10:15:54,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-09-28 10:15:54,263 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 79 [2018-09-28 10:15:54,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:54,263 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-09-28 10:15:54,263 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-28 10:15:54,263 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-09-28 10:15:54,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-09-28 10:15:54,264 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:54,264 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1] [2018-09-28 10:15:54,264 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:54,264 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:54,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1203886190, now seen corresponding path program 39 times [2018-09-28 10:15:54,264 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:54,265 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:54,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:54,265 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:54,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:54,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:55,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:55,232 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:55,233 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:55,241 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:15:55,278 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-09-28 10:15:55,278 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:55,280 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:56,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:56,255 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:56,255 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 80 [2018-09-28 10:15:56,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-28 10:15:56,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-28 10:15:56,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2541, Invalid=4101, Unknown=0, NotChecked=0, Total=6642 [2018-09-28 10:15:56,256 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 82 states. [2018-09-28 10:15:56,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:56,437 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-09-28 10:15:56,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-28 10:15:56,438 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 81 [2018-09-28 10:15:56,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:56,439 INFO L225 Difference]: With dead ends: 85 [2018-09-28 10:15:56,439 INFO L226 Difference]: Without dead ends: 84 [2018-09-28 10:15:56,440 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3120 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2541, Invalid=4101, Unknown=0, NotChecked=0, Total=6642 [2018-09-28 10:15:56,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-09-28 10:15:56,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-09-28 10:15:56,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-09-28 10:15:56,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-09-28 10:15:56,443 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 81 [2018-09-28 10:15:56,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:56,443 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-09-28 10:15:56,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-28 10:15:56,444 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-09-28 10:15:56,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-28 10:15:56,444 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:56,444 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1] [2018-09-28 10:15:56,445 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:56,445 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:56,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1588427056, now seen corresponding path program 40 times [2018-09-28 10:15:56,445 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:56,445 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:56,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:56,446 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:56,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:56,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:57,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:57,343 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:57,343 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:57,350 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:15:57,374 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:15:57,374 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:57,376 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:58,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:58,391 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:58,391 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 82 [2018-09-28 10:15:58,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-28 10:15:58,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-28 10:15:58,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2666, Invalid=4306, Unknown=0, NotChecked=0, Total=6972 [2018-09-28 10:15:58,393 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 84 states. [2018-09-28 10:15:58,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:58,590 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-09-28 10:15:58,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-28 10:15:58,590 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 83 [2018-09-28 10:15:58,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:58,591 INFO L225 Difference]: With dead ends: 87 [2018-09-28 10:15:58,591 INFO L226 Difference]: Without dead ends: 86 [2018-09-28 10:15:58,591 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3280 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2666, Invalid=4306, Unknown=0, NotChecked=0, Total=6972 [2018-09-28 10:15:58,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-09-28 10:15:58,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-09-28 10:15:58,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-09-28 10:15:58,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-09-28 10:15:58,595 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 83 [2018-09-28 10:15:58,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:58,595 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-09-28 10:15:58,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-28 10:15:58,596 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-09-28 10:15:58,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-09-28 10:15:58,596 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:58,596 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1] [2018-09-28 10:15:58,597 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:58,597 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:58,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1765011826, now seen corresponding path program 41 times [2018-09-28 10:15:58,597 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:58,597 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:58,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:58,598 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:58,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:58,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:59,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:59,687 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:59,687 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:59,709 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:15:59,755 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-09-28 10:15:59,755 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:59,757 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:00,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:00,901 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:00,902 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 84 [2018-09-28 10:16:00,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-28 10:16:00,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-28 10:16:00,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2794, Invalid=4516, Unknown=0, NotChecked=0, Total=7310 [2018-09-28 10:16:00,903 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 86 states. [2018-09-28 10:16:01,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:01,093 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-09-28 10:16:01,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-28 10:16:01,094 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 85 [2018-09-28 10:16:01,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:01,095 INFO L225 Difference]: With dead ends: 89 [2018-09-28 10:16:01,095 INFO L226 Difference]: Without dead ends: 88 [2018-09-28 10:16:01,095 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 [2018-09-28 10:16:01,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-09-28 10:16:01,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-09-28 10:16:01,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-09-28 10:16:01,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-09-28 10:16:01,100 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 85 [2018-09-28 10:16:01,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:01,100 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-09-28 10:16:01,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-28 10:16:01,101 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-09-28 10:16:01,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-09-28 10:16:01,101 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:01,101 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1] [2018-09-28 10:16:01,101 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:01,102 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:01,102 INFO L82 PathProgramCache]: Analyzing trace with hash -335716044, now seen corresponding path program 42 times [2018-09-28 10:16:01,102 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:01,102 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:01,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:01,103 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:01,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:01,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:02,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:02,158 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:02,159 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:02,167 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:16:02,206 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-28 10:16:02,207 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:02,209 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:03,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:03,417 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:03,417 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 86 [2018-09-28 10:16:03,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-28 10:16:03,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-28 10:16:03,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2925, Invalid=4731, Unknown=0, NotChecked=0, Total=7656 [2018-09-28 10:16:03,419 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 88 states. [2018-09-28 10:16:03,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:03,684 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-09-28 10:16:03,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-28 10:16:03,684 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 87 [2018-09-28 10:16:03,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:03,685 INFO L225 Difference]: With dead ends: 91 [2018-09-28 10:16:03,685 INFO L226 Difference]: Without dead ends: 90 [2018-09-28 10:16:03,686 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3612 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2925, Invalid=4731, Unknown=0, NotChecked=0, Total=7656 [2018-09-28 10:16:03,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-09-28 10:16:03,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-09-28 10:16:03,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-09-28 10:16:03,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-09-28 10:16:03,689 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 87 [2018-09-28 10:16:03,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:03,689 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-09-28 10:16:03,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-28 10:16:03,690 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-09-28 10:16:03,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-09-28 10:16:03,690 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:03,690 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1] [2018-09-28 10:16:03,690 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:03,690 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:03,691 INFO L82 PathProgramCache]: Analyzing trace with hash -500569994, now seen corresponding path program 43 times [2018-09-28 10:16:03,691 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:03,691 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:03,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:03,691 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:03,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:03,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:05,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:05,482 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:05,482 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:05,490 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:16:05,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:05,518 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:06,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:06,702 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:06,702 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 88 [2018-09-28 10:16:06,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-28 10:16:06,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-28 10:16:06,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3059, Invalid=4951, Unknown=0, NotChecked=0, Total=8010 [2018-09-28 10:16:06,704 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 90 states. [2018-09-28 10:16:06,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:06,879 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-09-28 10:16:06,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-28 10:16:06,880 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 89 [2018-09-28 10:16:06,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:06,881 INFO L225 Difference]: With dead ends: 93 [2018-09-28 10:16:06,881 INFO L226 Difference]: Without dead ends: 92 [2018-09-28 10:16:06,882 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3784 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3059, Invalid=4951, Unknown=0, NotChecked=0, Total=8010 [2018-09-28 10:16:06,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-09-28 10:16:06,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-09-28 10:16:06,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-09-28 10:16:06,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-09-28 10:16:06,886 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 89 [2018-09-28 10:16:06,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:06,886 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-09-28 10:16:06,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-28 10:16:06,886 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-09-28 10:16:06,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-09-28 10:16:06,887 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:06,887 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1] [2018-09-28 10:16:06,887 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:06,887 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:06,887 INFO L82 PathProgramCache]: Analyzing trace with hash -11425992, now seen corresponding path program 44 times [2018-09-28 10:16:06,887 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:06,888 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:06,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:06,888 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:16:06,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:06,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:07,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:07,948 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:07,948 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:07,957 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:16:07,981 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:16:07,981 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:07,983 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:09,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:09,396 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:09,396 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 90 [2018-09-28 10:16:09,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-28 10:16:09,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-28 10:16:09,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3196, Invalid=5176, Unknown=0, NotChecked=0, Total=8372 [2018-09-28 10:16:09,398 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 92 states. [2018-09-28 10:16:09,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:09,586 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-09-28 10:16:09,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-28 10:16:09,586 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 91 [2018-09-28 10:16:09,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:09,587 INFO L225 Difference]: With dead ends: 95 [2018-09-28 10:16:09,587 INFO L226 Difference]: Without dead ends: 94 [2018-09-28 10:16:09,588 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3960 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3196, Invalid=5176, Unknown=0, NotChecked=0, Total=8372 [2018-09-28 10:16:09,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-09-28 10:16:09,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-09-28 10:16:09,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-09-28 10:16:09,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-09-28 10:16:09,593 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 91 [2018-09-28 10:16:09,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:09,593 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-09-28 10:16:09,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-28 10:16:09,593 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-09-28 10:16:09,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-09-28 10:16:09,594 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:09,594 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1] [2018-09-28 10:16:09,594 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:09,594 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:09,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1904524666, now seen corresponding path program 45 times [2018-09-28 10:16:09,595 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:09,595 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:09,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:09,596 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:09,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:09,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:10,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:10,653 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:10,653 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:10,662 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:16:10,744 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-09-28 10:16:10,744 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:10,746 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:12,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:12,066 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:12,066 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 92 [2018-09-28 10:16:12,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-28 10:16:12,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-28 10:16:12,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3336, Invalid=5406, Unknown=0, NotChecked=0, Total=8742 [2018-09-28 10:16:12,067 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 94 states. [2018-09-28 10:16:12,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:12,312 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-09-28 10:16:12,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-28 10:16:12,312 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 93 [2018-09-28 10:16:12,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:12,313 INFO L225 Difference]: With dead ends: 97 [2018-09-28 10:16:12,314 INFO L226 Difference]: Without dead ends: 96 [2018-09-28 10:16:12,314 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4140 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3336, Invalid=5406, Unknown=0, NotChecked=0, Total=8742 [2018-09-28 10:16:12,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-09-28 10:16:12,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-09-28 10:16:12,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-09-28 10:16:12,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-09-28 10:16:12,318 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 93 [2018-09-28 10:16:12,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:12,318 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-09-28 10:16:12,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-28 10:16:12,318 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-09-28 10:16:12,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-09-28 10:16:12,318 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:12,319 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1] [2018-09-28 10:16:12,319 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:12,319 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:12,319 INFO L82 PathProgramCache]: Analyzing trace with hash 592137020, now seen corresponding path program 46 times [2018-09-28 10:16:12,319 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:12,319 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:12,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:12,320 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:12,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:12,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:13,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:13,414 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:13,414 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:13,422 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:16:13,448 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:16:13,449 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:13,451 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:15,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:15,044 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:15,044 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 94 [2018-09-28 10:16:15,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-28 10:16:15,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-28 10:16:15,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3479, Invalid=5641, Unknown=0, NotChecked=0, Total=9120 [2018-09-28 10:16:15,046 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 96 states. [2018-09-28 10:16:15,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:15,235 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-09-28 10:16:15,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-28 10:16:15,236 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 95 [2018-09-28 10:16:15,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:15,237 INFO L225 Difference]: With dead ends: 99 [2018-09-28 10:16:15,237 INFO L226 Difference]: Without dead ends: 98 [2018-09-28 10:16:15,237 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 [2018-09-28 10:16:15,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-09-28 10:16:15,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-09-28 10:16:15,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-09-28 10:16:15,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-09-28 10:16:15,241 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 95 [2018-09-28 10:16:15,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:15,241 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-09-28 10:16:15,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-28 10:16:15,242 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-09-28 10:16:15,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-09-28 10:16:15,242 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:15,242 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1] [2018-09-28 10:16:15,243 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:15,243 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:15,243 INFO L82 PathProgramCache]: Analyzing trace with hash 2107994238, now seen corresponding path program 47 times [2018-09-28 10:16:15,243 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:15,243 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:15,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:15,244 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:15,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:15,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:16,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:16,683 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:16,683 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:16,690 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:16:16,736 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-09-28 10:16:16,737 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:16,739 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:18,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:18,209 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:18,209 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 96 [2018-09-28 10:16:18,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-28 10:16:18,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-28 10:16:18,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3625, Invalid=5881, Unknown=0, NotChecked=0, Total=9506 [2018-09-28 10:16:18,211 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 98 states. [2018-09-28 10:16:18,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:18,426 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-09-28 10:16:18,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-28 10:16:18,426 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 97 [2018-09-28 10:16:18,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:18,427 INFO L225 Difference]: With dead ends: 101 [2018-09-28 10:16:18,428 INFO L226 Difference]: Without dead ends: 100 [2018-09-28 10:16:18,428 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4512 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3625, Invalid=5881, Unknown=0, NotChecked=0, Total=9506 [2018-09-28 10:16:18,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-09-28 10:16:18,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-09-28 10:16:18,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-28 10:16:18,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-09-28 10:16:18,433 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 97 [2018-09-28 10:16:18,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:18,434 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-09-28 10:16:18,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-28 10:16:18,434 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-09-28 10:16:18,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-09-28 10:16:18,435 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:18,435 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1] [2018-09-28 10:16:18,435 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:18,435 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:18,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1442099904, now seen corresponding path program 48 times [2018-09-28 10:16:18,435 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:18,435 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:18,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:18,436 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:18,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:18,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:19,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:19,851 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:19,851 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:19,859 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:16:19,911 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-28 10:16:19,911 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:19,913 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:21,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:21,323 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:21,323 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 98 [2018-09-28 10:16:21,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-28 10:16:21,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-28 10:16:21,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3774, Invalid=6126, Unknown=0, NotChecked=0, Total=9900 [2018-09-28 10:16:21,325 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 100 states. [2018-09-28 10:16:21,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:21,571 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-09-28 10:16:21,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-28 10:16:21,571 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 99 [2018-09-28 10:16:21,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:21,573 INFO L225 Difference]: With dead ends: 103 [2018-09-28 10:16:21,573 INFO L226 Difference]: Without dead ends: 102 [2018-09-28 10:16:21,574 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 [2018-09-28 10:16:21,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-09-28 10:16:21,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-09-28 10:16:21,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-09-28 10:16:21,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-09-28 10:16:21,578 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 99 [2018-09-28 10:16:21,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:21,578 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-09-28 10:16:21,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-28 10:16:21,578 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-09-28 10:16:21,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-09-28 10:16:21,579 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:21,579 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1] [2018-09-28 10:16:21,579 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:21,579 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:21,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1416429954, now seen corresponding path program 49 times [2018-09-28 10:16:21,580 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:21,580 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:21,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:21,580 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:21,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:21,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:22,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:22,960 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:22,961 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:22,968 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:16:22,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:22,997 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:25,715 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:25,735 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:25,736 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 100 [2018-09-28 10:16:25,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-28 10:16:25,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-28 10:16:25,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3926, Invalid=6376, Unknown=0, NotChecked=0, Total=10302 [2018-09-28 10:16:25,737 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 102 states. [2018-09-28 10:16:25,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:25,994 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-09-28 10:16:25,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-28 10:16:25,994 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 101 [2018-09-28 10:16:25,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:25,995 INFO L225 Difference]: With dead ends: 105 [2018-09-28 10:16:25,996 INFO L226 Difference]: Without dead ends: 104 [2018-09-28 10:16:25,998 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4900 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3926, Invalid=6376, Unknown=0, NotChecked=0, Total=10302 [2018-09-28 10:16:25,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-09-28 10:16:26,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-09-28 10:16:26,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-09-28 10:16:26,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-09-28 10:16:26,003 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 101 [2018-09-28 10:16:26,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:26,003 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-09-28 10:16:26,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-28 10:16:26,003 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-09-28 10:16:26,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-09-28 10:16:26,004 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:26,004 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1] [2018-09-28 10:16:26,004 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:26,005 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:26,005 INFO L82 PathProgramCache]: Analyzing trace with hash -315445948, now seen corresponding path program 50 times [2018-09-28 10:16:26,005 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:26,005 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:26,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:26,006 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:16:26,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:26,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:27,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:27,591 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:27,591 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:27,599 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:16:27,635 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:16:27,635 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:27,637 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:29,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:29,181 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:29,182 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 102 [2018-09-28 10:16:29,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-28 10:16:29,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-28 10:16:29,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4081, Invalid=6631, Unknown=0, NotChecked=0, Total=10712 [2018-09-28 10:16:29,184 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 104 states. [2018-09-28 10:16:30,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:30,624 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-09-28 10:16:30,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-28 10:16:30,624 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 103 [2018-09-28 10:16:30,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:30,626 INFO L225 Difference]: With dead ends: 107 [2018-09-28 10:16:30,626 INFO L226 Difference]: Without dead ends: 106 [2018-09-28 10:16:30,627 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5100 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4081, Invalid=6631, Unknown=0, NotChecked=0, Total=10712 [2018-09-28 10:16:30,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-09-28 10:16:30,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-09-28 10:16:30,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-09-28 10:16:30,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-09-28 10:16:30,631 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 103 [2018-09-28 10:16:30,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:30,632 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-09-28 10:16:30,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-28 10:16:30,632 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-09-28 10:16:30,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-09-28 10:16:30,633 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:30,633 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1] [2018-09-28 10:16:30,633 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:30,633 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:30,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1799123078, now seen corresponding path program 51 times [2018-09-28 10:16:30,633 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:30,633 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:30,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:30,634 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:30,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:30,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:32,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:32,088 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:32,088 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:32,111 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:16:32,164 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-09-28 10:16:32,164 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:32,166 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:33,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:33,738 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:33,738 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 104 [2018-09-28 10:16:33,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-28 10:16:33,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-28 10:16:33,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4239, Invalid=6891, Unknown=0, NotChecked=0, Total=11130 [2018-09-28 10:16:33,741 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 106 states. [2018-09-28 10:16:33,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:33,958 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-09-28 10:16:33,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-28 10:16:33,958 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 105 [2018-09-28 10:16:33,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:33,960 INFO L225 Difference]: With dead ends: 109 [2018-09-28 10:16:33,960 INFO L226 Difference]: Without dead ends: 108 [2018-09-28 10:16:33,961 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5304 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4239, Invalid=6891, Unknown=0, NotChecked=0, Total=11130 [2018-09-28 10:16:33,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-09-28 10:16:33,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-09-28 10:16:33,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-09-28 10:16:33,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-09-28 10:16:33,966 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 105 [2018-09-28 10:16:33,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:33,966 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-09-28 10:16:33,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-28 10:16:33,966 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-09-28 10:16:33,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-09-28 10:16:33,967 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:33,967 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1] [2018-09-28 10:16:33,967 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:33,967 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:33,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1914541240, now seen corresponding path program 52 times [2018-09-28 10:16:33,968 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:33,968 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:33,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:33,968 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:33,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:33,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:35,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:35,489 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:35,489 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:35,504 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:16:35,547 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:16:35,547 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:35,550 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:37,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:37,540 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:37,540 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 106 [2018-09-28 10:16:37,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-28 10:16:37,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-28 10:16:37,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4400, Invalid=7156, Unknown=0, NotChecked=0, Total=11556 [2018-09-28 10:16:37,542 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 108 states. [2018-09-28 10:16:37,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:37,756 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-09-28 10:16:37,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-28 10:16:37,756 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 107 [2018-09-28 10:16:37,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:37,757 INFO L225 Difference]: With dead ends: 111 [2018-09-28 10:16:37,757 INFO L226 Difference]: Without dead ends: 110 [2018-09-28 10:16:37,759 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5512 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4400, Invalid=7156, Unknown=0, NotChecked=0, Total=11556 [2018-09-28 10:16:37,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-09-28 10:16:37,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-09-28 10:16:37,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-09-28 10:16:37,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-09-28 10:16:37,763 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 107 [2018-09-28 10:16:37,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:37,764 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-09-28 10:16:37,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-28 10:16:37,764 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-09-28 10:16:37,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-09-28 10:16:37,764 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:37,765 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1] [2018-09-28 10:16:37,765 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:37,765 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:37,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1628127862, now seen corresponding path program 53 times [2018-09-28 10:16:37,765 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:37,765 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:37,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:37,766 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:37,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:37,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:39,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:39,067 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:39,068 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:39,083 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:16:39,201 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-09-28 10:16:39,202 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:39,204 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:41,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:41,066 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:41,066 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 108 [2018-09-28 10:16:41,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-09-28 10:16:41,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-09-28 10:16:41,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4564, Invalid=7426, Unknown=0, NotChecked=0, Total=11990 [2018-09-28 10:16:41,069 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 110 states. [2018-09-28 10:16:41,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:41,284 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-09-28 10:16:41,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-28 10:16:41,285 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 109 [2018-09-28 10:16:41,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:41,285 INFO L225 Difference]: With dead ends: 113 [2018-09-28 10:16:41,285 INFO L226 Difference]: Without dead ends: 112 [2018-09-28 10:16:41,286 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5724 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4564, Invalid=7426, Unknown=0, NotChecked=0, Total=11990 [2018-09-28 10:16:41,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-09-28 10:16:41,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-09-28 10:16:41,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-09-28 10:16:41,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-09-28 10:16:41,290 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 109 [2018-09-28 10:16:41,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:41,290 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-09-28 10:16:41,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-09-28 10:16:41,290 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-09-28 10:16:41,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-09-28 10:16:41,291 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:41,291 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1] [2018-09-28 10:16:41,291 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:41,291 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:41,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1262778548, now seen corresponding path program 54 times [2018-09-28 10:16:41,291 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:41,291 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:41,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:41,292 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:41,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:41,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:43,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:43,103 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:43,103 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:43,112 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:16:43,167 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-09-28 10:16:43,167 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:43,170 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:45,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:45,313 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:45,313 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 110 [2018-09-28 10:16:45,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-09-28 10:16:45,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-09-28 10:16:45,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4731, Invalid=7701, Unknown=0, NotChecked=0, Total=12432 [2018-09-28 10:16:45,314 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 112 states. [2018-09-28 10:16:45,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:45,557 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-09-28 10:16:45,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-28 10:16:45,558 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 111 [2018-09-28 10:16:45,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:45,559 INFO L225 Difference]: With dead ends: 115 [2018-09-28 10:16:45,560 INFO L226 Difference]: Without dead ends: 114 [2018-09-28 10:16:45,563 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5940 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=4731, Invalid=7701, Unknown=0, NotChecked=0, Total=12432 [2018-09-28 10:16:45,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-09-28 10:16:45,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-09-28 10:16:45,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-09-28 10:16:45,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2018-09-28 10:16:45,565 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 111 [2018-09-28 10:16:45,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:45,566 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2018-09-28 10:16:45,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-09-28 10:16:45,566 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2018-09-28 10:16:45,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-09-28 10:16:45,566 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:45,566 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1] [2018-09-28 10:16:45,567 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:45,567 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:45,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1945561230, now seen corresponding path program 55 times [2018-09-28 10:16:45,567 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:45,567 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:45,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:45,568 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:45,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:45,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:46,976 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:46,977 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:46,977 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:46,985 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:16:47,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:47,016 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:48,725 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:48,744 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:48,744 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 112 [2018-09-28 10:16:48,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-09-28 10:16:48,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-09-28 10:16:48,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4901, Invalid=7981, Unknown=0, NotChecked=0, Total=12882 [2018-09-28 10:16:48,747 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 114 states. [2018-09-28 10:16:49,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:49,268 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-09-28 10:16:49,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-28 10:16:49,269 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 113 [2018-09-28 10:16:49,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:49,270 INFO L225 Difference]: With dead ends: 117 [2018-09-28 10:16:49,270 INFO L226 Difference]: Without dead ends: 116 [2018-09-28 10:16:49,271 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6160 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4901, Invalid=7981, Unknown=0, NotChecked=0, Total=12882 [2018-09-28 10:16:49,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-09-28 10:16:49,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-09-28 10:16:49,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-09-28 10:16:49,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2018-09-28 10:16:49,276 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 113 [2018-09-28 10:16:49,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:49,276 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2018-09-28 10:16:49,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-09-28 10:16:49,276 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2018-09-28 10:16:49,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-09-28 10:16:49,277 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:49,277 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 1, 1] [2018-09-28 10:16:49,277 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:49,277 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:49,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1373569360, now seen corresponding path program 56 times [2018-09-28 10:16:49,278 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:49,278 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:49,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:49,278 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:16:49,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:49,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:52,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:52,360 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:52,360 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:52,370 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:16:52,399 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:16:52,400 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:52,402 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:54,219 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:54,240 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:54,240 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 114 [2018-09-28 10:16:54,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-09-28 10:16:54,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-09-28 10:16:54,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5074, Invalid=8266, Unknown=0, NotChecked=0, Total=13340 [2018-09-28 10:16:54,242 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 116 states. [2018-09-28 10:16:54,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:54,544 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-09-28 10:16:54,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-28 10:16:54,544 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 115 [2018-09-28 10:16:54,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:54,545 INFO L225 Difference]: With dead ends: 119 [2018-09-28 10:16:54,546 INFO L226 Difference]: Without dead ends: 118 [2018-09-28 10:16:54,547 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6384 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=5074, Invalid=8266, Unknown=0, NotChecked=0, Total=13340 [2018-09-28 10:16:54,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-09-28 10:16:54,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-09-28 10:16:54,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-09-28 10:16:54,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2018-09-28 10:16:54,550 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 115 [2018-09-28 10:16:54,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:54,550 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2018-09-28 10:16:54,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-09-28 10:16:54,550 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2018-09-28 10:16:54,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-09-28 10:16:54,551 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:54,551 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 1, 1] [2018-09-28 10:16:54,551 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:54,551 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:54,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1445196178, now seen corresponding path program 57 times [2018-09-28 10:16:54,551 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:54,551 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:54,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:54,552 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:54,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:54,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:56,343 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:56,343 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:56,343 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:56,352 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:16:56,412 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-09-28 10:16:56,413 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:56,415 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:58,344 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:58,365 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:58,365 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 116 [2018-09-28 10:16:58,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-09-28 10:16:58,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-09-28 10:16:58,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5250, Invalid=8556, Unknown=0, NotChecked=0, Total=13806 [2018-09-28 10:16:58,367 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 118 states. [2018-09-28 10:16:58,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:58,624 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-09-28 10:16:58,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-28 10:16:58,625 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 117 [2018-09-28 10:16:58,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:58,626 INFO L225 Difference]: With dead ends: 121 [2018-09-28 10:16:58,626 INFO L226 Difference]: Without dead ends: 120 [2018-09-28 10:16:58,627 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6612 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5250, Invalid=8556, Unknown=0, NotChecked=0, Total=13806 [2018-09-28 10:16:58,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-09-28 10:16:58,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2018-09-28 10:16:58,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-09-28 10:16:58,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2018-09-28 10:16:58,630 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 117 [2018-09-28 10:16:58,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:58,630 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2018-09-28 10:16:58,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-09-28 10:16:58,630 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2018-09-28 10:16:58,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-09-28 10:16:58,631 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:58,631 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 1, 1] [2018-09-28 10:16:58,631 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:58,631 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:58,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1559091540, now seen corresponding path program 58 times [2018-09-28 10:16:58,631 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:58,631 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:58,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:58,632 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:58,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:58,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:00,820 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:00,820 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:00,820 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:17:00,828 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:17:00,862 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:17:00,862 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:17:00,864 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:03,002 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:03,022 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:03,022 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 118 [2018-09-28 10:17:03,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-09-28 10:17:03,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-09-28 10:17:03,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5429, Invalid=8851, Unknown=0, NotChecked=0, Total=14280 [2018-09-28 10:17:03,024 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand 120 states. [2018-09-28 10:17:03,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:03,309 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-09-28 10:17:03,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-28 10:17:03,310 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 119 [2018-09-28 10:17:03,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:03,311 INFO L225 Difference]: With dead ends: 123 [2018-09-28 10:17:03,311 INFO L226 Difference]: Without dead ends: 122 [2018-09-28 10:17:03,311 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 [2018-09-28 10:17:03,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-09-28 10:17:03,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2018-09-28 10:17:03,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-09-28 10:17:03,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2018-09-28 10:17:03,316 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 119 [2018-09-28 10:17:03,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:03,316 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2018-09-28 10:17:03,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-09-28 10:17:03,316 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2018-09-28 10:17:03,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-09-28 10:17:03,317 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:03,317 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 1, 1] [2018-09-28 10:17:03,317 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:03,317 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:03,317 INFO L82 PathProgramCache]: Analyzing trace with hash -656615274, now seen corresponding path program 59 times [2018-09-28 10:17:03,318 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:03,318 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:03,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:03,318 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:17:03,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:03,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:05,735 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:05,736 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:05,736 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:17:05,743 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:17:05,808 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-09-28 10:17:05,809 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:17:05,814 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:07,986 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:08,007 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:08,008 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 120 [2018-09-28 10:17:08,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-09-28 10:17:08,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-09-28 10:17:08,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5611, Invalid=9151, Unknown=0, NotChecked=0, Total=14762 [2018-09-28 10:17:08,009 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 122 states. [2018-09-28 10:17:08,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:08,269 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-09-28 10:17:08,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-28 10:17:08,269 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 121 [2018-09-28 10:17:08,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:08,271 INFO L225 Difference]: With dead ends: 125 [2018-09-28 10:17:08,271 INFO L226 Difference]: Without dead ends: 124 [2018-09-28 10:17:08,272 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7080 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=5611, Invalid=9151, Unknown=0, NotChecked=0, Total=14762 [2018-09-28 10:17:08,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-09-28 10:17:08,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2018-09-28 10:17:08,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-09-28 10:17:08,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2018-09-28 10:17:08,276 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 121 [2018-09-28 10:17:08,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:08,276 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2018-09-28 10:17:08,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-09-28 10:17:08,276 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2018-09-28 10:17:08,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-09-28 10:17:08,276 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:08,276 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 1, 1] [2018-09-28 10:17:08,277 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:08,277 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:08,277 INFO L82 PathProgramCache]: Analyzing trace with hash 352915288, now seen corresponding path program 60 times [2018-09-28 10:17:08,277 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:08,277 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:08,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:08,278 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:17:08,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:08,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:09,999 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:09,999 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:09,999 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:17:10,010 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:17:10,089 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-09-28 10:17:10,089 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:17:10,092 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:12,396 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:12,416 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:12,417 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 122 [2018-09-28 10:17:12,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-09-28 10:17:12,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-09-28 10:17:12,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5796, Invalid=9456, Unknown=0, NotChecked=0, Total=15252 [2018-09-28 10:17:12,418 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 124 states. [2018-09-28 10:17:12,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:12,670 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-09-28 10:17:12,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-28 10:17:12,670 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 123 [2018-09-28 10:17:12,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:12,671 INFO L225 Difference]: With dead ends: 127 [2018-09-28 10:17:12,671 INFO L226 Difference]: Without dead ends: 126 [2018-09-28 10:17:12,672 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7320 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5796, Invalid=9456, Unknown=0, NotChecked=0, Total=15252 [2018-09-28 10:17:12,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-09-28 10:17:12,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2018-09-28 10:17:12,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-09-28 10:17:12,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2018-09-28 10:17:12,678 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 123 [2018-09-28 10:17:12,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:12,678 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2018-09-28 10:17:12,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-09-28 10:17:12,678 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2018-09-28 10:17:12,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-09-28 10:17:12,679 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:12,679 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 1, 1] [2018-09-28 10:17:12,679 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:12,679 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:12,679 INFO L82 PathProgramCache]: Analyzing trace with hash -150823526, now seen corresponding path program 61 times [2018-09-28 10:17:12,680 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:12,680 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:12,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:12,680 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:17:12,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:12,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:14,302 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:14,303 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:14,303 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:17:14,312 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:17:14,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:14,346 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:16,769 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:16,789 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:16,789 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 124 [2018-09-28 10:17:16,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-09-28 10:17:16,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-09-28 10:17:16,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5984, Invalid=9766, Unknown=0, NotChecked=0, Total=15750 [2018-09-28 10:17:16,791 INFO L87 Difference]: Start difference. First operand 126 states and 126 transitions. Second operand 126 states. [2018-09-28 10:17:17,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:17,166 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-09-28 10:17:17,166 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-28 10:17:17,166 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 125 [2018-09-28 10:17:17,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:17,167 INFO L225 Difference]: With dead ends: 129 [2018-09-28 10:17:17,167 INFO L226 Difference]: Without dead ends: 128 [2018-09-28 10:17:17,168 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7564 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5984, Invalid=9766, Unknown=0, NotChecked=0, Total=15750 [2018-09-28 10:17:17,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-09-28 10:17:17,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2018-09-28 10:17:17,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-09-28 10:17:17,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2018-09-28 10:17:17,171 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 125 [2018-09-28 10:17:17,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:17,171 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2018-09-28 10:17:17,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-09-28 10:17:17,172 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2018-09-28 10:17:17,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-09-28 10:17:17,172 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:17,172 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 1, 1] [2018-09-28 10:17:17,172 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:17,172 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:17,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1087480668, now seen corresponding path program 62 times [2018-09-28 10:17:17,173 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:17,173 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:17,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:17,173 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:17:17,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:17,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:18,984 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:18,984 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:18,984 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:17:18,993 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:17:19,028 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:17:19,028 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:17:19,030 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:21,441 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:21,462 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:21,462 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 126 [2018-09-28 10:17:21,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-09-28 10:17:21,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-09-28 10:17:21,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6175, Invalid=10081, Unknown=0, NotChecked=0, Total=16256 [2018-09-28 10:17:21,464 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 128 states. [2018-09-28 10:17:21,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:21,725 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-09-28 10:17:21,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-28 10:17:21,726 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 127 [2018-09-28 10:17:21,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:21,727 INFO L225 Difference]: With dead ends: 131 [2018-09-28 10:17:21,727 INFO L226 Difference]: Without dead ends: 130 [2018-09-28 10:17:21,728 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7812 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=6175, Invalid=10081, Unknown=0, NotChecked=0, Total=16256 [2018-09-28 10:17:21,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-09-28 10:17:21,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2018-09-28 10:17:21,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-09-28 10:17:21,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 130 transitions. [2018-09-28 10:17:21,732 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 130 transitions. Word has length 127 [2018-09-28 10:17:21,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:21,733 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 130 transitions. [2018-09-28 10:17:21,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-09-28 10:17:21,733 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 130 transitions. [2018-09-28 10:17:21,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-09-28 10:17:21,733 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:21,733 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 1, 1] [2018-09-28 10:17:21,733 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:21,734 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:21,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1391870110, now seen corresponding path program 63 times [2018-09-28 10:17:21,734 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:21,734 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:21,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:21,735 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:17:21,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:21,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:23,473 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:23,474 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:23,474 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:17:23,482 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:17:23,548 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-09-28 10:17:23,548 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:17:23,551 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:26,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:26,098 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:26,098 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 128 [2018-09-28 10:17:26,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-09-28 10:17:26,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-09-28 10:17:26,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6369, Invalid=10401, Unknown=0, NotChecked=0, Total=16770 [2018-09-28 10:17:26,100 INFO L87 Difference]: Start difference. First operand 130 states and 130 transitions. Second operand 130 states. [2018-09-28 10:17:26,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:26,406 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-09-28 10:17:26,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-28 10:17:26,406 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 129 [2018-09-28 10:17:26,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:26,407 INFO L225 Difference]: With dead ends: 133 [2018-09-28 10:17:26,408 INFO L226 Difference]: Without dead ends: 132 [2018-09-28 10:17:26,409 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8064 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=6369, Invalid=10401, Unknown=0, NotChecked=0, Total=16770 [2018-09-28 10:17:26,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-09-28 10:17:26,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2018-09-28 10:17:26,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-09-28 10:17:26,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2018-09-28 10:17:26,412 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 129 [2018-09-28 10:17:26,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:26,413 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2018-09-28 10:17:26,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-09-28 10:17:26,413 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2018-09-28 10:17:26,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-09-28 10:17:26,414 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:26,414 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 1, 1] [2018-09-28 10:17:26,414 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:26,414 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:26,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1852347744, now seen corresponding path program 64 times [2018-09-28 10:17:26,414 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:26,414 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:26,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:26,416 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:17:26,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:26,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:28,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:28,197 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:28,197 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:17:28,205 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:17:28,244 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:17:28,245 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:17:28,247 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:30,610 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:30,633 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:30,633 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 130 [2018-09-28 10:17:30,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-09-28 10:17:30,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-09-28 10:17:30,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6566, Invalid=10726, Unknown=0, NotChecked=0, Total=17292 [2018-09-28 10:17:30,635 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand 132 states. [2018-09-28 10:17:30,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:30,986 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-09-28 10:17:30,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-28 10:17:30,986 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 131 [2018-09-28 10:17:30,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:30,987 INFO L225 Difference]: With dead ends: 135 [2018-09-28 10:17:30,987 INFO L226 Difference]: Without dead ends: 134 [2018-09-28 10:17:30,988 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8320 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=6566, Invalid=10726, Unknown=0, NotChecked=0, Total=17292 [2018-09-28 10:17:30,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-09-28 10:17:30,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2018-09-28 10:17:30,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-09-28 10:17:30,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2018-09-28 10:17:30,992 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 131 [2018-09-28 10:17:30,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:30,992 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2018-09-28 10:17:30,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-09-28 10:17:30,992 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2018-09-28 10:17:30,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-09-28 10:17:30,992 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:30,993 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 1, 1] [2018-09-28 10:17:30,993 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:30,993 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:30,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1989722530, now seen corresponding path program 65 times [2018-09-28 10:17:30,993 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:30,993 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:30,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:30,994 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:17:30,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:31,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:32,887 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:32,887 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:32,888 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:17:32,895 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:17:32,971 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-09-28 10:17:32,972 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:17:32,975 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:36,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:36,664 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:36,664 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 132 [2018-09-28 10:17:36,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-09-28 10:17:36,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-09-28 10:17:36,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6766, Invalid=11056, Unknown=0, NotChecked=0, Total=17822 [2018-09-28 10:17:36,667 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand 134 states. [2018-09-28 10:17:37,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:37,012 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-09-28 10:17:37,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-28 10:17:37,012 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 133 [2018-09-28 10:17:37,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:37,014 INFO L225 Difference]: With dead ends: 137 [2018-09-28 10:17:37,014 INFO L226 Difference]: Without dead ends: 136 [2018-09-28 10:17:37,015 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8580 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=6766, Invalid=11056, Unknown=0, NotChecked=0, Total=17822 [2018-09-28 10:17:37,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-09-28 10:17:37,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2018-09-28 10:17:37,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-09-28 10:17:37,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2018-09-28 10:17:37,020 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 133 [2018-09-28 10:17:37,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:37,020 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2018-09-28 10:17:37,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-09-28 10:17:37,020 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2018-09-28 10:17:37,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-09-28 10:17:37,021 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:37,021 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 1, 1] [2018-09-28 10:17:37,021 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:37,021 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:37,022 INFO L82 PathProgramCache]: Analyzing trace with hash 862905700, now seen corresponding path program 66 times [2018-09-28 10:17:37,022 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:37,022 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:37,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:37,023 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:17:37,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:37,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:38,959 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:38,960 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:38,960 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:17:38,969 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:17:39,036 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-09-28 10:17:39,036 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:17:39,039 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:41,763 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:41,783 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:41,784 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 134 [2018-09-28 10:17:41,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-09-28 10:17:41,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-09-28 10:17:41,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6969, Invalid=11391, Unknown=0, NotChecked=0, Total=18360 [2018-09-28 10:17:41,786 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand 136 states. [2018-09-28 10:17:42,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:42,104 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-09-28 10:17:42,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-28 10:17:42,105 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 135 [2018-09-28 10:17:42,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:42,106 INFO L225 Difference]: With dead ends: 139 [2018-09-28 10:17:42,106 INFO L226 Difference]: Without dead ends: 138 [2018-09-28 10:17:42,107 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8844 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=6969, Invalid=11391, Unknown=0, NotChecked=0, Total=18360 [2018-09-28 10:17:42,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-09-28 10:17:42,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2018-09-28 10:17:42,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-09-28 10:17:42,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2018-09-28 10:17:42,110 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 135 [2018-09-28 10:17:42,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:42,110 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2018-09-28 10:17:42,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-09-28 10:17:42,110 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2018-09-28 10:17:42,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-09-28 10:17:42,111 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:42,111 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 1, 1] [2018-09-28 10:17:42,111 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:42,111 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:42,111 INFO L82 PathProgramCache]: Analyzing trace with hash 323690662, now seen corresponding path program 67 times [2018-09-28 10:17:42,111 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:42,111 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:42,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:42,112 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:17:42,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:42,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:44,245 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:44,245 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:44,245 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:17:44,253 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:17:44,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:44,291 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:47,043 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:47,064 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:47,065 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 136 [2018-09-28 10:17:47,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-09-28 10:17:47,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-09-28 10:17:47,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7175, Invalid=11731, Unknown=0, NotChecked=0, Total=18906 [2018-09-28 10:17:47,066 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand 138 states. [2018-09-28 10:17:47,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:47,394 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-09-28 10:17:47,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-28 10:17:47,395 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 137 [2018-09-28 10:17:47,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:47,396 INFO L225 Difference]: With dead ends: 141 [2018-09-28 10:17:47,396 INFO L226 Difference]: Without dead ends: 140 [2018-09-28 10:17:47,397 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 [2018-09-28 10:17:47,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-09-28 10:17:47,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2018-09-28 10:17:47,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-09-28 10:17:47,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2018-09-28 10:17:47,402 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 137 [2018-09-28 10:17:47,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:47,402 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2018-09-28 10:17:47,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-09-28 10:17:47,402 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2018-09-28 10:17:47,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-09-28 10:17:47,402 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:47,403 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 1, 1] [2018-09-28 10:17:47,403 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:47,403 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:47,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1829081960, now seen corresponding path program 68 times [2018-09-28 10:17:47,403 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:47,403 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:47,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:47,404 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:17:47,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:47,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:49,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:49,425 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:49,425 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:17:49,433 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:17:49,468 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:17:49,468 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:17:49,471 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:52,296 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:52,316 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:52,316 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 138 [2018-09-28 10:17:52,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 140 states [2018-09-28 10:17:52,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2018-09-28 10:17:52,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7384, Invalid=12076, Unknown=0, NotChecked=0, Total=19460 [2018-09-28 10:17:52,319 INFO L87 Difference]: Start difference. First operand 140 states and 140 transitions. Second operand 140 states. [2018-09-28 10:17:52,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:52,641 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-09-28 10:17:52,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-28 10:17:52,641 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 139 [2018-09-28 10:17:52,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:52,642 INFO L225 Difference]: With dead ends: 143 [2018-09-28 10:17:52,643 INFO L226 Difference]: Without dead ends: 142 [2018-09-28 10:17:52,644 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 [2018-09-28 10:17:52,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-09-28 10:17:52,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2018-09-28 10:17:52,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-09-28 10:17:52,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 142 transitions. [2018-09-28 10:17:52,648 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 142 transitions. Word has length 139 [2018-09-28 10:17:52,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:52,649 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 142 transitions. [2018-09-28 10:17:52,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has 140 states. [2018-09-28 10:17:52,649 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 142 transitions. [2018-09-28 10:17:52,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-09-28 10:17:52,650 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:52,650 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 1, 1] [2018-09-28 10:17:52,650 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:52,650 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:52,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1106140586, now seen corresponding path program 69 times [2018-09-28 10:17:52,651 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:52,651 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:52,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:52,651 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:17:52,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:52,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:54,764 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:54,764 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:54,764 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:17:54,771 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:17:54,853 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-09-28 10:17:54,853 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:17:54,856 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:57,668 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:57,688 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:57,689 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 140 [2018-09-28 10:17:57,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-09-28 10:17:57,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-09-28 10:17:57,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7596, Invalid=12426, Unknown=0, NotChecked=0, Total=20022 [2018-09-28 10:17:57,691 INFO L87 Difference]: Start difference. First operand 142 states and 142 transitions. Second operand 142 states. [2018-09-28 10:17:58,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:58,062 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-09-28 10:17:58,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-28 10:17:58,063 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 141 [2018-09-28 10:17:58,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:58,064 INFO L225 Difference]: With dead ends: 145 [2018-09-28 10:17:58,064 INFO L226 Difference]: Without dead ends: 144 [2018-09-28 10:17:58,065 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9660 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=7596, Invalid=12426, Unknown=0, NotChecked=0, Total=20022 [2018-09-28 10:17:58,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-09-28 10:17:58,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2018-09-28 10:17:58,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-09-28 10:17:58,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 144 transitions. [2018-09-28 10:17:58,069 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 144 transitions. Word has length 141 [2018-09-28 10:17:58,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:58,070 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 144 transitions. [2018-09-28 10:17:58,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-09-28 10:17:58,070 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 144 transitions. [2018-09-28 10:17:58,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-09-28 10:17:58,070 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:58,070 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 1, 1] [2018-09-28 10:17:58,070 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:58,071 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:58,071 INFO L82 PathProgramCache]: Analyzing trace with hash 2144182124, now seen corresponding path program 70 times [2018-09-28 10:17:58,071 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:58,071 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:58,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:58,071 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:17:58,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:58,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:00,246 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:00,247 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:18:00,247 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:18:00,254 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:18:00,291 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:18:00,291 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:18:00,295 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:18:03,574 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:03,595 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:18:03,595 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 142 [2018-09-28 10:18:03,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-09-28 10:18:03,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-09-28 10:18:03,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7811, Invalid=12781, Unknown=0, NotChecked=0, Total=20592 [2018-09-28 10:18:03,598 INFO L87 Difference]: Start difference. First operand 144 states and 144 transitions. Second operand 144 states. [2018-09-28 10:18:03,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:18:03,991 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-09-28 10:18:03,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-28 10:18:03,992 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 143 [2018-09-28 10:18:03,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:18:03,993 INFO L225 Difference]: With dead ends: 147 [2018-09-28 10:18:03,993 INFO L226 Difference]: Without dead ends: 146 [2018-09-28 10:18:03,994 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9940 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=7811, Invalid=12781, Unknown=0, NotChecked=0, Total=20592 [2018-09-28 10:18:03,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-09-28 10:18:03,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2018-09-28 10:18:03,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-09-28 10:18:03,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 146 transitions. [2018-09-28 10:18:03,998 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 146 transitions. Word has length 143 [2018-09-28 10:18:03,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:18:03,998 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 146 transitions. [2018-09-28 10:18:03,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-09-28 10:18:03,998 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 146 transitions. [2018-09-28 10:18:03,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-09-28 10:18:03,999 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:18:03,999 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 1, 1] [2018-09-28 10:18:03,999 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:18:03,999 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:18:03,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1025279826, now seen corresponding path program 71 times [2018-09-28 10:18:03,999 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:18:03,999 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:18:04,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:04,000 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:18:04,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:04,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:06,235 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:06,235 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:18:06,236 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:18:06,243 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:18:06,438 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-09-28 10:18:06,439 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:18:06,444 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:18:09,568 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:09,591 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:18:09,591 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 144 [2018-09-28 10:18:09,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 146 states [2018-09-28 10:18:09,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2018-09-28 10:18:09,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8029, Invalid=13141, Unknown=0, NotChecked=0, Total=21170 [2018-09-28 10:18:09,594 INFO L87 Difference]: Start difference. First operand 146 states and 146 transitions. Second operand 146 states. [2018-09-28 10:18:09,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:18:09,961 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-09-28 10:18:09,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-28 10:18:09,962 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 145 [2018-09-28 10:18:09,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:18:09,963 INFO L225 Difference]: With dead ends: 149 [2018-09-28 10:18:09,964 INFO L226 Difference]: Without dead ends: 148 [2018-09-28 10:18:09,965 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10224 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=8029, Invalid=13141, Unknown=0, NotChecked=0, Total=21170 [2018-09-28 10:18:09,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-09-28 10:18:09,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2018-09-28 10:18:09,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-09-28 10:18:09,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2018-09-28 10:18:09,969 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 145 [2018-09-28 10:18:09,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:18:09,970 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2018-09-28 10:18:09,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has 146 states. [2018-09-28 10:18:09,970 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2018-09-28 10:18:09,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-09-28 10:18:09,971 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:18:09,971 INFO L375 BasicCegarLoop]: trace histogram [73, 72, 1, 1] [2018-09-28 10:18:09,971 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:18:09,971 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:18:09,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1746400912, now seen corresponding path program 72 times [2018-09-28 10:18:09,971 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:18:09,971 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:18:09,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:09,972 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:18:09,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:09,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:12,495 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:12,496 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:18:12,496 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:18:12,502 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:18:12,591 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-09-28 10:18:12,591 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:18:12,594 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:18:15,493 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:15,514 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:18:15,514 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 146 [2018-09-28 10:18:15,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 148 states [2018-09-28 10:18:15,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2018-09-28 10:18:15,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8250, Invalid=13506, Unknown=0, NotChecked=0, Total=21756 [2018-09-28 10:18:15,516 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 148 states. [2018-09-28 10:18:15,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:18:15,999 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-09-28 10:18:15,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-28 10:18:15,999 INFO L78 Accepts]: Start accepts. Automaton has 148 states. Word has length 147 [2018-09-28 10:18:16,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:18:16,001 INFO L225 Difference]: With dead ends: 151 [2018-09-28 10:18:16,001 INFO L226 Difference]: Without dead ends: 150 [2018-09-28 10:18:16,002 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10512 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=8250, Invalid=13506, Unknown=0, NotChecked=0, Total=21756 [2018-09-28 10:18:16,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-09-28 10:18:16,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2018-09-28 10:18:16,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-09-28 10:18:16,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 150 transitions. [2018-09-28 10:18:16,007 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 150 transitions. Word has length 147 [2018-09-28 10:18:16,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:18:16,007 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 150 transitions. [2018-09-28 10:18:16,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has 148 states. [2018-09-28 10:18:16,008 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 150 transitions. [2018-09-28 10:18:16,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-09-28 10:18:16,008 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:18:16,008 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 1, 1] [2018-09-28 10:18:16,009 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:18:16,009 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:18:16,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1040937394, now seen corresponding path program 73 times [2018-09-28 10:18:16,009 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:18:16,009 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:18:16,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:16,010 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:18:16,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:16,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:18,618 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:18,618 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:18:18,618 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:18:18,626 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:18:18,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:18,667 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:18:21,631 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:21,651 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:18:21,652 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 148 [2018-09-28 10:18:21,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 150 states [2018-09-28 10:18:21,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2018-09-28 10:18:21,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8474, Invalid=13876, Unknown=0, NotChecked=0, Total=22350 [2018-09-28 10:18:21,654 INFO L87 Difference]: Start difference. First operand 150 states and 150 transitions. Second operand 150 states. [2018-09-28 10:18:22,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:18:22,117 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-09-28 10:18:22,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-28 10:18:22,117 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 149 [2018-09-28 10:18:22,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:18:22,118 INFO L225 Difference]: With dead ends: 153 [2018-09-28 10:18:22,118 INFO L226 Difference]: Without dead ends: 152 [2018-09-28 10:18:22,119 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 [2018-09-28 10:18:22,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-09-28 10:18:22,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2018-09-28 10:18:22,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-09-28 10:18:22,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 152 transitions. [2018-09-28 10:18:22,123 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 152 transitions. Word has length 149 [2018-09-28 10:18:22,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:18:22,123 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 152 transitions. [2018-09-28 10:18:22,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has 150 states. [2018-09-28 10:18:22,124 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 152 transitions. [2018-09-28 10:18:22,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-09-28 10:18:22,124 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:18:22,125 INFO L375 BasicCegarLoop]: trace histogram [75, 74, 1, 1] [2018-09-28 10:18:22,125 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:18:22,125 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:18:22,125 INFO L82 PathProgramCache]: Analyzing trace with hash -386543244, now seen corresponding path program 74 times [2018-09-28 10:18:22,125 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:18:22,125 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:18:22,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:22,126 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:18:22,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:22,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:24,547 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:24,547 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:18:24,547 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:18:24,555 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:18:24,593 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:18:24,593 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:18:24,596 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:18:27,937 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:27,957 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:18:27,957 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 150 [2018-09-28 10:18:27,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 152 states [2018-09-28 10:18:27,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2018-09-28 10:18:27,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8701, Invalid=14251, Unknown=0, NotChecked=0, Total=22952 [2018-09-28 10:18:27,959 INFO L87 Difference]: Start difference. First operand 152 states and 152 transitions. Second operand 152 states. [2018-09-28 10:18:28,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:18:28,362 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-09-28 10:18:28,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-28 10:18:28,362 INFO L78 Accepts]: Start accepts. Automaton has 152 states. Word has length 151 [2018-09-28 10:18:28,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:18:28,363 INFO L225 Difference]: With dead ends: 155 [2018-09-28 10:18:28,363 INFO L226 Difference]: Without dead ends: 154 [2018-09-28 10:18:28,364 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 [2018-09-28 10:18:28,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-09-28 10:18:28,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2018-09-28 10:18:28,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-09-28 10:18:28,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 154 transitions. [2018-09-28 10:18:28,369 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 154 transitions. Word has length 151 [2018-09-28 10:18:28,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:18:28,369 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 154 transitions. [2018-09-28 10:18:28,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has 152 states. [2018-09-28 10:18:28,369 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 154 transitions. [2018-09-28 10:18:28,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-09-28 10:18:28,370 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:18:28,370 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 1, 1] [2018-09-28 10:18:28,370 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:18:28,370 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:18:28,371 INFO L82 PathProgramCache]: Analyzing trace with hash -2100868938, now seen corresponding path program 75 times [2018-09-28 10:18:28,371 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:18:28,371 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:18:28,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:28,371 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:18:28,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:28,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:30,817 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:30,818 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:18:30,818 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:18:30,826 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:18:30,911 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-09-28 10:18:30,911 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:18:30,913 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:18:34,335 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:34,357 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:18:34,357 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 152 [2018-09-28 10:18:34,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 154 states [2018-09-28 10:18:34,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2018-09-28 10:18:34,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8931, Invalid=14631, Unknown=0, NotChecked=0, Total=23562 [2018-09-28 10:18:34,359 INFO L87 Difference]: Start difference. First operand 154 states and 154 transitions. Second operand 154 states. [2018-09-28 10:18:34,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:18:34,782 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-09-28 10:18:34,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-28 10:18:34,782 INFO L78 Accepts]: Start accepts. Automaton has 154 states. Word has length 153 [2018-09-28 10:18:34,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:18:34,784 INFO L225 Difference]: With dead ends: 157 [2018-09-28 10:18:34,784 INFO L226 Difference]: Without dead ends: 156 [2018-09-28 10:18:34,785 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11400 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=8931, Invalid=14631, Unknown=0, NotChecked=0, Total=23562 [2018-09-28 10:18:34,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-09-28 10:18:34,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2018-09-28 10:18:34,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-09-28 10:18:34,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 156 transitions. [2018-09-28 10:18:34,789 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 156 transitions. Word has length 153 [2018-09-28 10:18:34,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:18:34,789 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 156 transitions. [2018-09-28 10:18:34,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has 154 states. [2018-09-28 10:18:34,789 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 156 transitions. [2018-09-28 10:18:34,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-09-28 10:18:34,790 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:18:34,790 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 1, 1] [2018-09-28 10:18:34,790 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:18:34,790 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:18:34,791 INFO L82 PathProgramCache]: Analyzing trace with hash -300419208, now seen corresponding path program 76 times [2018-09-28 10:18:34,791 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:18:34,791 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:18:34,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:34,791 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:18:34,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:34,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:37,365 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:37,366 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:18:37,366 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:18:37,373 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:18:37,417 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:18:37,417 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:18:37,420 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:18:40,693 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:40,714 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:18:40,714 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 154 [2018-09-28 10:18:40,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 156 states [2018-09-28 10:18:40,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2018-09-28 10:18:40,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9164, Invalid=15016, Unknown=0, NotChecked=0, Total=24180 [2018-09-28 10:18:40,716 INFO L87 Difference]: Start difference. First operand 156 states and 156 transitions. Second operand 156 states. [2018-09-28 10:18:41,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:18:41,069 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-09-28 10:18:41,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-28 10:18:41,070 INFO L78 Accepts]: Start accepts. Automaton has 156 states. Word has length 155 [2018-09-28 10:18:41,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:18:41,071 INFO L225 Difference]: With dead ends: 159 [2018-09-28 10:18:41,071 INFO L226 Difference]: Without dead ends: 158 [2018-09-28 10:18:41,072 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11704 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=9164, Invalid=15016, Unknown=0, NotChecked=0, Total=24180 [2018-09-28 10:18:41,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-09-28 10:18:41,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2018-09-28 10:18:41,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-09-28 10:18:41,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 158 transitions. [2018-09-28 10:18:41,076 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 158 transitions. Word has length 155 [2018-09-28 10:18:41,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:18:41,076 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 158 transitions. [2018-09-28 10:18:41,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has 156 states. [2018-09-28 10:18:41,077 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 158 transitions. [2018-09-28 10:18:41,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-09-28 10:18:41,077 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:18:41,077 INFO L375 BasicCegarLoop]: trace histogram [78, 77, 1, 1] [2018-09-28 10:18:41,077 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:18:41,078 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:18:41,078 INFO L82 PathProgramCache]: Analyzing trace with hash -940048966, now seen corresponding path program 77 times [2018-09-28 10:18:41,078 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:18:41,078 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:18:41,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:41,079 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:18:41,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:41,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:43,918 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:43,918 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:18:43,918 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:18:43,929 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:18:44,027 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-09-28 10:18:44,028 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:18:44,032 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:18:47,305 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:47,325 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:18:47,325 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 156 [2018-09-28 10:18:47,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 158 states [2018-09-28 10:18:47,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2018-09-28 10:18:47,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9400, Invalid=15406, Unknown=0, NotChecked=0, Total=24806 [2018-09-28 10:18:47,327 INFO L87 Difference]: Start difference. First operand 158 states and 158 transitions. Second operand 158 states. [2018-09-28 10:18:47,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:18:47,780 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-09-28 10:18:47,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-28 10:18:47,781 INFO L78 Accepts]: Start accepts. Automaton has 158 states. Word has length 157 [2018-09-28 10:18:47,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:18:47,782 INFO L225 Difference]: With dead ends: 161 [2018-09-28 10:18:47,782 INFO L226 Difference]: Without dead ends: 160 [2018-09-28 10:18:47,783 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 [2018-09-28 10:18:47,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-09-28 10:18:47,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2018-09-28 10:18:47,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-09-28 10:18:47,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 160 transitions. [2018-09-28 10:18:47,788 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 160 transitions. Word has length 157 [2018-09-28 10:18:47,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:18:47,788 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 160 transitions. [2018-09-28 10:18:47,788 INFO L481 AbstractCegarLoop]: Interpolant automaton has 158 states. [2018-09-28 10:18:47,789 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 160 transitions. [2018-09-28 10:18:47,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-09-28 10:18:47,789 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:18:47,790 INFO L375 BasicCegarLoop]: trace histogram [79, 78, 1, 1] [2018-09-28 10:18:47,790 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:18:47,790 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:18:47,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1443923076, now seen corresponding path program 78 times [2018-09-28 10:18:47,790 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:18:47,790 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:18:47,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:47,791 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:18:47,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:47,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:50,402 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:50,403 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:18:50,403 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:18:50,411 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:18:50,520 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-09-28 10:18:50,520 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:18:50,523 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:18:54,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:54,151 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:18:54,151 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 158 [2018-09-28 10:18:54,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 160 states [2018-09-28 10:18:54,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2018-09-28 10:18:54,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9639, Invalid=15801, Unknown=0, NotChecked=0, Total=25440 [2018-09-28 10:18:54,153 INFO L87 Difference]: Start difference. First operand 160 states and 160 transitions. Second operand 160 states. [2018-09-28 10:18:54,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:18:54,607 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-09-28 10:18:54,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-28 10:18:54,607 INFO L78 Accepts]: Start accepts. Automaton has 160 states. Word has length 159 [2018-09-28 10:18:54,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:18:54,608 INFO L225 Difference]: With dead ends: 163 [2018-09-28 10:18:54,608 INFO L226 Difference]: Without dead ends: 162 [2018-09-28 10:18:54,609 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12324 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=9639, Invalid=15801, Unknown=0, NotChecked=0, Total=25440 [2018-09-28 10:18:54,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-09-28 10:18:54,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2018-09-28 10:18:54,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2018-09-28 10:18:54,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 162 transitions. [2018-09-28 10:18:54,614 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 162 transitions. Word has length 159 [2018-09-28 10:18:54,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:18:54,615 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 162 transitions. [2018-09-28 10:18:54,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has 160 states. [2018-09-28 10:18:54,615 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 162 transitions. [2018-09-28 10:18:54,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-09-28 10:18:54,616 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:18:54,616 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 1, 1] [2018-09-28 10:18:54,616 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:18:54,616 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:18:54,616 INFO L82 PathProgramCache]: Analyzing trace with hash -335638338, now seen corresponding path program 79 times [2018-09-28 10:18:54,617 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:18:54,617 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:18:54,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:54,617 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:18:54,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:54,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:57,334 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:57,334 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:18:57,334 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:18:57,341 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:18:57,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:57,383 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:19:00,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:19:00,911 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:19:00,912 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 160 [2018-09-28 10:19:00,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 162 states [2018-09-28 10:19:00,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2018-09-28 10:19:00,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9881, Invalid=16201, Unknown=0, NotChecked=0, Total=26082 [2018-09-28 10:19:00,914 INFO L87 Difference]: Start difference. First operand 162 states and 162 transitions. Second operand 162 states. [2018-09-28 10:19:01,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:19:01,293 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-09-28 10:19:01,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-28 10:19:01,294 INFO L78 Accepts]: Start accepts. Automaton has 162 states. Word has length 161 [2018-09-28 10:19:01,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:19:01,295 INFO L225 Difference]: With dead ends: 165 [2018-09-28 10:19:01,295 INFO L226 Difference]: Without dead ends: 164 [2018-09-28 10:19:01,295 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12640 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=9881, Invalid=16201, Unknown=0, NotChecked=0, Total=26082 [2018-09-28 10:19:01,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-09-28 10:19:01,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2018-09-28 10:19:01,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-09-28 10:19:01,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 164 transitions. [2018-09-28 10:19:01,300 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 164 transitions. Word has length 161 [2018-09-28 10:19:01,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:19:01,301 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 164 transitions. [2018-09-28 10:19:01,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has 162 states. [2018-09-28 10:19:01,301 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 164 transitions. [2018-09-28 10:19:01,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-09-28 10:19:01,302 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:19:01,302 INFO L375 BasicCegarLoop]: trace histogram [81, 80, 1, 1] [2018-09-28 10:19:01,302 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:19:01,302 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:19:01,302 INFO L82 PathProgramCache]: Analyzing trace with hash -425894528, now seen corresponding path program 80 times [2018-09-28 10:19:01,303 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:19:01,303 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:19:01,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:19:01,303 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:19:01,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:19:01,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:19:04,339 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:19:04,339 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:19:04,340 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:19:04,347 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:19:04,389 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:19:04,389 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:19:04,405 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:19:07,823 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:19:07,843 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:19:07,843 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 162 [2018-09-28 10:19:07,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 164 states [2018-09-28 10:19:07,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2018-09-28 10:19:07,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10126, Invalid=16606, Unknown=0, NotChecked=0, Total=26732 [2018-09-28 10:19:07,845 INFO L87 Difference]: Start difference. First operand 164 states and 164 transitions. Second operand 164 states. [2018-09-28 10:19:08,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:19:08,296 INFO L93 Difference]: Finished difference Result 167 states and 167 transitions. [2018-09-28 10:19:08,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-28 10:19:08,297 INFO L78 Accepts]: Start accepts. Automaton has 164 states. Word has length 163 [2018-09-28 10:19:08,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:19:08,298 INFO L225 Difference]: With dead ends: 167 [2018-09-28 10:19:08,298 INFO L226 Difference]: Without dead ends: 166 [2018-09-28 10:19:08,298 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12960 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=10126, Invalid=16606, Unknown=0, NotChecked=0, Total=26732 [2018-09-28 10:19:08,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-09-28 10:19:08,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2018-09-28 10:19:08,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-09-28 10:19:08,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 166 transitions. [2018-09-28 10:19:08,303 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 166 transitions. Word has length 163 [2018-09-28 10:19:08,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:19:08,303 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 166 transitions. [2018-09-28 10:19:08,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has 164 states. [2018-09-28 10:19:08,303 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 166 transitions. [2018-09-28 10:19:08,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2018-09-28 10:19:08,304 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:19:08,304 INFO L375 BasicCegarLoop]: trace histogram [82, 81, 1, 1] [2018-09-28 10:19:08,304 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:19:08,304 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:19:08,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1262747198, now seen corresponding path program 81 times [2018-09-28 10:19:08,304 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:19:08,304 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:19:08,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:19:08,305 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:19:08,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:19:08,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-09-28 10:19:10,392 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-28 10:19:10,397 WARN L206 ceAbstractionStarter]: Timeout [2018-09-28 10:19:10,397 INFO L202 PluginConnector]: Adding new model MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.09 10:19:10 BoogieIcfgContainer [2018-09-28 10:19:10,397 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-28 10:19:10,398 INFO L168 Benchmark]: Toolchain (without parser) took 240336.73 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -71.8 MB). Free memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: 291.2 MB). Peak memory consumption was 219.4 MB. Max. memory is 7.1 GB. [2018-09-28 10:19:10,400 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-28 10:19:10,400 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.83 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-28 10:19:10,400 INFO L168 Benchmark]: Boogie Preprocessor took 21.31 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-28 10:19:10,401 INFO L168 Benchmark]: RCFGBuilder took 237.25 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-28 10:19:10,401 INFO L168 Benchmark]: TraceAbstraction took 240028.97 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -71.8 MB). Free memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: 270.1 MB). Peak memory consumption was 198.2 MB. Max. memory is 7.1 GB. [2018-09-28 10:19:10,403 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 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 42.83 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 21.31 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 237.25 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 240028.97 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -71.8 MB). Free memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: 270.1 MB). Peak memory consumption was 198.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 25]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 25). Cancelled while BasicCegarLoop was analyzing trace of length 166 with TraceHistMax 82, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 72 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 239.9s OverallTime, 82 OverallIterations, 82 TraceHistogramMax, 19.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 164 SDtfs, 0 SDslu, 1 SDs, 0 SdLazy, 13557 SolverSat, 260 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 14.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9961 GetRequests, 3320 SyntacticMatches, 0 SemanticMatches, 6641 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354240 ImplicationChecksByTransitivity, 204.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=166occurred in iteration=81, 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, 81 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 3.8s SatisfiabilityAnalysisTime, 209.6s InterpolantComputationTime, 13443 NumberOfCodeBlocks, 13443 NumberOfCodeBlocksAsserted, 1774 NumberOfCheckSat, 13282 ConstructedInterpolants, 0 QuantifiedInterpolants, 8661140 SizeOfPredicates, 0 NumberOfNonLiveVariables, 13600 ConjunctsInSsa, 3480 ConjunctsInUnsatCore, 161 InterpolantComputations, 1 PerfectInterpolantSequences, 0/354240 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/MonadicInvariant01.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-28_10-19-10-412.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/MonadicInvariant01.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-28_10-19-10-412.csv Completed graceful shutdown