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/20170304-DifficultPathPrograms/count_by_k.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-133090d [2018-10-04 09:16:14,069 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-04 09:16:14,071 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-04 09:16:14,091 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-04 09:16:14,091 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-04 09:16:14,093 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-04 09:16:14,094 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-04 09:16:14,097 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-04 09:16:14,100 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-04 09:16:14,102 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-04 09:16:14,105 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-04 09:16:14,105 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-04 09:16:14,106 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-04 09:16:14,107 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-04 09:16:14,108 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-04 09:16:14,111 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-04 09:16:14,112 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-04 09:16:14,114 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-04 09:16:14,116 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-04 09:16:14,118 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-04 09:16:14,119 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-04 09:16:14,120 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-04 09:16:14,122 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-04 09:16:14,123 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-04 09:16:14,123 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-04 09:16:14,124 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-04 09:16:14,125 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-04 09:16:14,126 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-04 09:16:14,127 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-04 09:16:14,128 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-04 09:16:14,129 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-04 09:16:14,129 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-04 09:16:14,130 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-04 09:16:14,130 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-04 09:16:14,134 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-04 09:16:14,135 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-04 09:16:14,135 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-10-04 09:16:14,170 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-04 09:16:14,171 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-04 09:16:14,172 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-04 09:16:14,172 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-04 09:16:14,173 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-04 09:16:14,173 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-04 09:16:14,173 INFO L133 SettingsManager]: * Use SBE=true [2018-10-04 09:16:14,173 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-04 09:16:14,174 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-04 09:16:14,177 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-04 09:16:14,177 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-04 09:16:14,177 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-04 09:16:14,177 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-04 09:16:14,177 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-04 09:16:14,178 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-04 09:16:14,178 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-04 09:16:14,178 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-04 09:16:14,178 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-04 09:16:14,178 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-04 09:16:14,179 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-04 09:16:14,180 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-04 09:16:14,180 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-04 09:16:14,180 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 09:16:14,181 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-04 09:16:14,181 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-04 09:16:14,181 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-04 09:16:14,181 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-04 09:16:14,181 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-04 09:16:14,182 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-04 09:16:14,182 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-04 09:16:14,247 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-04 09:16:14,262 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-04 09:16:14,269 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-04 09:16:14,271 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-04 09:16:14,271 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-04 09:16:14,272 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/count_by_k.i_3.bpl [2018-10-04 09:16:14,272 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/count_by_k.i_3.bpl' [2018-10-04 09:16:14,319 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-04 09:16:14,320 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-04 09:16:14,321 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-04 09:16:14,321 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-04 09:16:14,321 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-04 09:16:14,342 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:16:14" (1/1) ... [2018-10-04 09:16:14,356 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:16:14" (1/1) ... [2018-10-04 09:16:14,363 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-04 09:16:14,365 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-04 09:16:14,365 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-04 09:16:14,365 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-04 09:16:14,377 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:16:14" (1/1) ... [2018-10-04 09:16:14,377 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:16:14" (1/1) ... [2018-10-04 09:16:14,378 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:16:14" (1/1) ... [2018-10-04 09:16:14,378 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:16:14" (1/1) ... [2018-10-04 09:16:14,383 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:16:14" (1/1) ... [2018-10-04 09:16:14,385 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:16:14" (1/1) ... [2018-10-04 09:16:14,386 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:16:14" (1/1) ... [2018-10-04 09:16:14,387 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-04 09:16:14,388 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-04 09:16:14,388 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-04 09:16:14,388 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-04 09:16:14,390 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:16:14" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 09:16:14,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-04 09:16:14,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-04 09:16:14,682 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-04 09:16:14,682 INFO L202 PluginConnector]: Adding new model count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 09:16:14 BoogieIcfgContainer [2018-10-04 09:16:14,682 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-04 09:16:14,683 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-04 09:16:14,684 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-04 09:16:14,687 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-04 09:16:14,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:16:14" (1/2) ... [2018-10-04 09:16:14,689 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71a649e1 and model type count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 09:16:14, skipping insertion in model container [2018-10-04 09:16:14,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 09:16:14" (2/2) ... [2018-10-04 09:16:14,691 INFO L112 eAbstractionObserver]: Analyzing ICFG count_by_k.i_3.bpl [2018-10-04 09:16:14,701 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-04 09:16:14,709 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-04 09:16:14,761 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-04 09:16:14,762 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-04 09:16:14,762 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-04 09:16:14,762 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-04 09:16:14,762 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-04 09:16:14,762 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-04 09:16:14,762 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-04 09:16:14,763 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-04 09:16:14,763 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-04 09:16:14,778 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-10-04 09:16:14,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-04 09:16:14,784 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:14,785 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-10-04 09:16:14,786 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:14,792 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:14,792 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-10-04 09:16:14,795 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:14,795 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:14,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:14,842 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:16:14,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:14,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:14,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:14,987 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 09:16:14,987 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-04 09:16:14,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-04 09:16:15,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-04 09:16:15,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-04 09:16:15,006 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-10-04 09:16:15,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:15,050 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-10-04 09:16:15,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-04 09:16:15,052 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-10-04 09:16:15,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:15,073 INFO L225 Difference]: With dead ends: 11 [2018-10-04 09:16:15,074 INFO L226 Difference]: Without dead ends: 7 [2018-10-04 09:16:15,083 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-04 09:16:15,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-04 09:16:15,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-04 09:16:15,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-04 09:16:15,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-10-04 09:16:15,135 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-10-04 09:16:15,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:15,135 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-10-04 09:16:15,136 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-04 09:16:15,136 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-10-04 09:16:15,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-04 09:16:15,136 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:15,137 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-10-04 09:16:15,137 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:15,137 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:15,138 INFO L82 PathProgramCache]: Analyzing trace with hash 889591169, now seen corresponding path program 1 times [2018-10-04 09:16:15,138 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:15,138 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:15,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:15,140 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:16:15,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:15,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:15,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:15,265 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:15,265 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:15,279 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:16:15,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:15,319 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:15,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:15,427 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:15,427 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2018-10-04 09:16:15,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-04 09:16:15,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-04 09:16:15,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-04 09:16:15,429 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 5 states. [2018-10-04 09:16:15,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:15,483 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2018-10-04 09:16:15,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 09:16:15,483 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2018-10-04 09:16:15,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:15,484 INFO L225 Difference]: With dead ends: 13 [2018-10-04 09:16:15,484 INFO L226 Difference]: Without dead ends: 11 [2018-10-04 09:16:15,486 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-04 09:16:15,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-04 09:16:15,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-04 09:16:15,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-04 09:16:15,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-04 09:16:15,491 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 6 [2018-10-04 09:16:15,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:15,491 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-04 09:16:15,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-04 09:16:15,492 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-04 09:16:15,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-04 09:16:15,492 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:15,493 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2018-10-04 09:16:15,493 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:15,493 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:15,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1946815861, now seen corresponding path program 2 times [2018-10-04 09:16:15,494 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:15,494 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:15,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:15,495 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:16:15,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:15,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:15,642 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:15,643 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:15,643 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:15,652 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:16:15,665 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:16:15,665 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:15,667 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:15,737 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:15,759 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:15,760 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-10-04 09:16:15,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-04 09:16:15,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-04 09:16:15,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-10-04 09:16:15,761 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 7 states. [2018-10-04 09:16:15,987 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 9 [2018-10-04 09:16:16,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:16,193 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2018-10-04 09:16:16,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 09:16:16,193 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2018-10-04 09:16:16,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:16,194 INFO L225 Difference]: With dead ends: 17 [2018-10-04 09:16:16,194 INFO L226 Difference]: Without dead ends: 15 [2018-10-04 09:16:16,195 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:16:16,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-04 09:16:16,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-04 09:16:16,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-04 09:16:16,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-04 09:16:16,201 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 10 [2018-10-04 09:16:16,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:16,202 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-04 09:16:16,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-04 09:16:16,202 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-04 09:16:16,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-04 09:16:16,203 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:16,203 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1] [2018-10-04 09:16:16,203 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:16,204 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:16,204 INFO L82 PathProgramCache]: Analyzing trace with hash 531164009, now seen corresponding path program 3 times [2018-10-04 09:16:16,204 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:16,205 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:16,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:16,206 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:16,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:16,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:16,358 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:16,359 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:16,359 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:16,372 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:16:16,386 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-04 09:16:16,387 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:16,389 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:16,518 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:16,542 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:16,542 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-10-04 09:16:16,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:16:16,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:16:16,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:16:16,544 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 9 states. [2018-10-04 09:16:16,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:16,831 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-10-04 09:16:16,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:16:16,832 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2018-10-04 09:16:16,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:16,833 INFO L225 Difference]: With dead ends: 21 [2018-10-04 09:16:16,833 INFO L226 Difference]: Without dead ends: 19 [2018-10-04 09:16:16,833 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2018-10-04 09:16:16,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-04 09:16:16,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-04 09:16:16,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-04 09:16:16,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-04 09:16:16,842 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 14 [2018-10-04 09:16:16,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:16,842 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-04 09:16:16,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:16:16,843 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-04 09:16:16,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-04 09:16:16,843 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:16,843 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1] [2018-10-04 09:16:16,844 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:16,844 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:16,844 INFO L82 PathProgramCache]: Analyzing trace with hash 67088221, now seen corresponding path program 4 times [2018-10-04 09:16:16,845 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:16,845 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:16,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:16,846 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:16,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:16,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:17,573 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:17,574 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:17,574 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:17,589 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:16:17,602 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:16:17,602 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:17,605 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:17,673 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:17,693 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:17,694 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-10-04 09:16:17,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:16:17,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:16:17,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:16:17,695 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 11 states. [2018-10-04 09:16:17,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:17,975 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-10-04 09:16:17,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:16:17,977 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 18 [2018-10-04 09:16:17,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:17,978 INFO L225 Difference]: With dead ends: 25 [2018-10-04 09:16:17,978 INFO L226 Difference]: Without dead ends: 23 [2018-10-04 09:16:17,978 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2018-10-04 09:16:17,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-04 09:16:17,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-04 09:16:17,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-04 09:16:17,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-04 09:16:17,986 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 18 [2018-10-04 09:16:17,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:17,987 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-04 09:16:17,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:16:17,987 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-04 09:16:17,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-04 09:16:17,988 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:17,988 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1] [2018-10-04 09:16:17,988 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:17,989 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:17,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1767155375, now seen corresponding path program 5 times [2018-10-04 09:16:17,989 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:17,989 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:17,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:17,990 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:17,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:18,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:18,209 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:18,209 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:18,209 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:18,228 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:16:18,250 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-04 09:16:18,250 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:18,253 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:18,321 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:18,343 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:18,343 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-10-04 09:16:18,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-04 09:16:18,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-04 09:16:18,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2018-10-04 09:16:18,344 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 13 states. [2018-10-04 09:16:18,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:18,823 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2018-10-04 09:16:18,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-04 09:16:18,824 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 22 [2018-10-04 09:16:18,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:18,826 INFO L225 Difference]: With dead ends: 29 [2018-10-04 09:16:18,826 INFO L226 Difference]: Without dead ends: 27 [2018-10-04 09:16:18,827 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2018-10-04 09:16:18,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-04 09:16:18,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-04 09:16:18,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-04 09:16:18,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-04 09:16:18,835 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 22 [2018-10-04 09:16:18,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:18,836 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-04 09:16:18,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-04 09:16:18,836 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-04 09:16:18,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-04 09:16:18,837 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:18,837 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1] [2018-10-04 09:16:18,837 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:18,837 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:18,838 INFO L82 PathProgramCache]: Analyzing trace with hash 919136581, now seen corresponding path program 6 times [2018-10-04 09:16:18,838 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:18,838 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:18,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:18,839 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:18,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:18,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:19,377 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:19,378 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:19,378 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:19,391 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:16:19,408 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2018-10-04 09:16:19,408 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:19,411 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:19,458 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:19,480 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:19,480 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-10-04 09:16:19,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-04 09:16:19,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-04 09:16:19,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2018-10-04 09:16:19,481 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 15 states. [2018-10-04 09:16:20,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:20,140 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2018-10-04 09:16:20,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-04 09:16:20,141 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 26 [2018-10-04 09:16:20,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:20,142 INFO L225 Difference]: With dead ends: 33 [2018-10-04 09:16:20,142 INFO L226 Difference]: Without dead ends: 31 [2018-10-04 09:16:20,143 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2018-10-04 09:16:20,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-04 09:16:20,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-04 09:16:20,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-04 09:16:20,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-10-04 09:16:20,155 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 26 [2018-10-04 09:16:20,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:20,156 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-10-04 09:16:20,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-04 09:16:20,156 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-10-04 09:16:20,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-04 09:16:20,157 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:20,157 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1] [2018-10-04 09:16:20,157 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:20,158 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:20,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1828020025, now seen corresponding path program 7 times [2018-10-04 09:16:20,158 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:20,158 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:20,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:20,159 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:20,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:20,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:20,815 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:20,815 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:20,815 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:20,826 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:16:20,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:20,849 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:20,898 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:20,918 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:20,919 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2018-10-04 09:16:20,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-04 09:16:20,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-04 09:16:20,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2018-10-04 09:16:20,920 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 17 states. [2018-10-04 09:16:21,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:21,667 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-10-04 09:16:21,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-04 09:16:21,669 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 30 [2018-10-04 09:16:21,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:21,670 INFO L225 Difference]: With dead ends: 37 [2018-10-04 09:16:21,670 INFO L226 Difference]: Without dead ends: 35 [2018-10-04 09:16:21,671 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2018-10-04 09:16:21,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-04 09:16:21,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-04 09:16:21,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-04 09:16:21,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-04 09:16:21,678 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 30 [2018-10-04 09:16:21,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:21,678 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-04 09:16:21,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-04 09:16:21,678 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-04 09:16:21,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-04 09:16:21,679 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:21,679 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1] [2018-10-04 09:16:21,679 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:21,680 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:21,680 INFO L82 PathProgramCache]: Analyzing trace with hash 726514477, now seen corresponding path program 8 times [2018-10-04 09:16:21,680 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:21,680 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:21,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:21,681 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:16:21,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:21,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:22,153 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:22,154 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:22,154 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) [2018-10-04 09:16:22,170 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:22,197 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:16:22,197 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:22,202 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:22,359 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:22,379 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:22,379 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2018-10-04 09:16:22,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-04 09:16:22,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-04 09:16:22,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2018-10-04 09:16:22,380 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 19 states. [2018-10-04 09:16:23,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:23,200 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2018-10-04 09:16:23,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-04 09:16:23,202 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 34 [2018-10-04 09:16:23,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:23,202 INFO L225 Difference]: With dead ends: 41 [2018-10-04 09:16:23,203 INFO L226 Difference]: Without dead ends: 39 [2018-10-04 09:16:23,203 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2018-10-04 09:16:23,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-04 09:16:23,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-04 09:16:23,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-04 09:16:23,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-10-04 09:16:23,210 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 34 [2018-10-04 09:16:23,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:23,210 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-10-04 09:16:23,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-04 09:16:23,211 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-10-04 09:16:23,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-04 09:16:23,212 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:23,212 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1] [2018-10-04 09:16:23,212 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:23,212 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:23,212 INFO L82 PathProgramCache]: Analyzing trace with hash 225377569, now seen corresponding path program 9 times [2018-10-04 09:16:23,212 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:23,213 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:23,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:23,214 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:23,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:23,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:23,566 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:23,567 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:23,567 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:23,577 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:16:23,611 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-04 09:16:23,611 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:23,614 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:23,735 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:23,756 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:23,756 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2018-10-04 09:16:23,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-04 09:16:23,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-04 09:16:23,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=380, Unknown=0, NotChecked=0, Total=420 [2018-10-04 09:16:23,757 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 21 states. [2018-10-04 09:16:24,160 WARN L178 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 11 [2018-10-04 09:16:24,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:24,845 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2018-10-04 09:16:24,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-04 09:16:24,846 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 38 [2018-10-04 09:16:24,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:24,847 INFO L225 Difference]: With dead ends: 45 [2018-10-04 09:16:24,847 INFO L226 Difference]: Without dead ends: 43 [2018-10-04 09:16:24,849 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=379, Invalid=1027, Unknown=0, NotChecked=0, Total=1406 [2018-10-04 09:16:24,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-04 09:16:24,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-04 09:16:24,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-04 09:16:24,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-10-04 09:16:24,857 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 38 [2018-10-04 09:16:24,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:24,858 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-10-04 09:16:24,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-04 09:16:24,858 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-10-04 09:16:24,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-04 09:16:24,859 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:24,860 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1] [2018-10-04 09:16:24,860 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:24,860 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:24,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1737087723, now seen corresponding path program 10 times [2018-10-04 09:16:24,860 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:24,861 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:24,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:24,862 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:24,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:24,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:25,217 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:25,218 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:25,218 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:25,225 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:16:25,241 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:16:25,241 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:25,243 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:25,289 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:25,319 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:25,319 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2018-10-04 09:16:25,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-04 09:16:25,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-04 09:16:25,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=462, Unknown=0, NotChecked=0, Total=506 [2018-10-04 09:16:25,321 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 23 states. [2018-10-04 09:16:26,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:26,497 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-10-04 09:16:26,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-04 09:16:26,498 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 42 [2018-10-04 09:16:26,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:26,498 INFO L225 Difference]: With dead ends: 49 [2018-10-04 09:16:26,498 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 09:16:26,500 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=461, Invalid=1261, Unknown=0, NotChecked=0, Total=1722 [2018-10-04 09:16:26,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 09:16:26,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-04 09:16:26,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-04 09:16:26,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-10-04 09:16:26,508 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 42 [2018-10-04 09:16:26,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:26,508 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-10-04 09:16:26,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-04 09:16:26,509 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-10-04 09:16:26,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-04 09:16:26,510 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:26,510 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1] [2018-10-04 09:16:26,510 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:26,511 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:26,511 INFO L82 PathProgramCache]: Analyzing trace with hash 2063610633, now seen corresponding path program 11 times [2018-10-04 09:16:26,511 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:26,511 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:26,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:26,512 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:26,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:26,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:26,919 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:26,920 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:26,920 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:26,947 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:16:26,989 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-10-04 09:16:26,989 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:26,995 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:27,078 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:27,100 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:27,100 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2018-10-04 09:16:27,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-04 09:16:27,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-04 09:16:27,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=552, Unknown=0, NotChecked=0, Total=600 [2018-10-04 09:16:27,101 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 25 states. [2018-10-04 09:16:28,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:28,158 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2018-10-04 09:16:28,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-04 09:16:28,159 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 46 [2018-10-04 09:16:28,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:28,160 INFO L225 Difference]: With dead ends: 53 [2018-10-04 09:16:28,160 INFO L226 Difference]: Without dead ends: 51 [2018-10-04 09:16:28,161 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=551, Invalid=1519, Unknown=0, NotChecked=0, Total=2070 [2018-10-04 09:16:28,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-04 09:16:28,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-04 09:16:28,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-04 09:16:28,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-10-04 09:16:28,168 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 46 [2018-10-04 09:16:28,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:28,169 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-10-04 09:16:28,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-04 09:16:28,169 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-10-04 09:16:28,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-04 09:16:28,170 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:28,170 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1] [2018-10-04 09:16:28,170 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:28,170 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:28,170 INFO L82 PathProgramCache]: Analyzing trace with hash -852875523, now seen corresponding path program 12 times [2018-10-04 09:16:28,171 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:28,171 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:28,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:28,172 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:28,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:28,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:28,831 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:28,831 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:28,831 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:28,840 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:16:28,862 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2018-10-04 09:16:28,863 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:28,866 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:28,974 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:28,995 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:28,995 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2018-10-04 09:16:28,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-04 09:16:28,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-04 09:16:28,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=650, Unknown=0, NotChecked=0, Total=702 [2018-10-04 09:16:28,996 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 27 states. [2018-10-04 09:16:30,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:30,382 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2018-10-04 09:16:30,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-04 09:16:30,382 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 50 [2018-10-04 09:16:30,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:30,383 INFO L225 Difference]: With dead ends: 57 [2018-10-04 09:16:30,383 INFO L226 Difference]: Without dead ends: 55 [2018-10-04 09:16:30,384 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=649, Invalid=1801, Unknown=0, NotChecked=0, Total=2450 [2018-10-04 09:16:30,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-04 09:16:30,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-10-04 09:16:30,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-04 09:16:30,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-10-04 09:16:30,393 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 50 [2018-10-04 09:16:30,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:30,393 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-10-04 09:16:30,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-04 09:16:30,393 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-10-04 09:16:30,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-04 09:16:30,394 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:30,394 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1] [2018-10-04 09:16:30,394 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:30,395 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:30,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1351680241, now seen corresponding path program 13 times [2018-10-04 09:16:30,395 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:30,395 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:30,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:30,396 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:30,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:30,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:30,855 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:30,856 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:30,856 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:30,864 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:16:30,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:30,920 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:30,996 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:31,016 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:31,016 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2018-10-04 09:16:31,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-04 09:16:31,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-04 09:16:31,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=756, Unknown=0, NotChecked=0, Total=812 [2018-10-04 09:16:31,018 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 29 states. [2018-10-04 09:16:31,317 WARN L178 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 11 [2018-10-04 09:16:32,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:32,706 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-10-04 09:16:32,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-04 09:16:32,707 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 54 [2018-10-04 09:16:32,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:32,708 INFO L225 Difference]: With dead ends: 61 [2018-10-04 09:16:32,708 INFO L226 Difference]: Without dead ends: 59 [2018-10-04 09:16:32,710 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=755, Invalid=2107, Unknown=0, NotChecked=0, Total=2862 [2018-10-04 09:16:32,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-04 09:16:32,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-04 09:16:32,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-04 09:16:32,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-10-04 09:16:32,717 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 54 [2018-10-04 09:16:32,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:32,718 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-10-04 09:16:32,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-04 09:16:32,718 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-10-04 09:16:32,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-04 09:16:32,719 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:32,719 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1] [2018-10-04 09:16:32,719 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:32,720 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:32,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1336819483, now seen corresponding path program 14 times [2018-10-04 09:16:32,720 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:32,720 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:32,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:32,721 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:16:32,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:32,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:33,311 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:33,311 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:33,311 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:33,320 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:16:33,368 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:16:33,368 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:33,389 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:33,467 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:33,490 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:33,490 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2018-10-04 09:16:33,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-04 09:16:33,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-04 09:16:33,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=870, Unknown=0, NotChecked=0, Total=930 [2018-10-04 09:16:33,491 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 31 states. [2018-10-04 09:16:34,534 WARN L178 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 11 [2018-10-04 09:16:35,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:35,595 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2018-10-04 09:16:35,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-04 09:16:35,595 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 58 [2018-10-04 09:16:35,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:35,596 INFO L225 Difference]: With dead ends: 65 [2018-10-04 09:16:35,596 INFO L226 Difference]: Without dead ends: 63 [2018-10-04 09:16:35,597 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=869, Invalid=2437, Unknown=0, NotChecked=0, Total=3306 [2018-10-04 09:16:35,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-04 09:16:35,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-10-04 09:16:35,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-04 09:16:35,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-10-04 09:16:35,606 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 58 [2018-10-04 09:16:35,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:35,607 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-10-04 09:16:35,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-04 09:16:35,607 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-10-04 09:16:35,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-04 09:16:35,608 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:35,608 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1] [2018-10-04 09:16:35,609 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:35,609 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:35,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1056348455, now seen corresponding path program 15 times [2018-10-04 09:16:35,609 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:35,609 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:35,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:35,610 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:35,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:35,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:36,548 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:36,549 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:36,549 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:36,556 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:16:36,590 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-10-04 09:16:36,591 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:36,595 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:36,697 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:36,723 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:36,723 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2018-10-04 09:16:36,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-04 09:16:36,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-04 09:16:36,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=992, Unknown=0, NotChecked=0, Total=1056 [2018-10-04 09:16:36,725 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 33 states. [2018-10-04 09:16:38,972 WARN L178 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 11 [2018-10-04 09:16:39,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:39,549 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2018-10-04 09:16:39,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-04 09:16:39,551 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 62 [2018-10-04 09:16:39,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:39,552 INFO L225 Difference]: With dead ends: 69 [2018-10-04 09:16:39,552 INFO L226 Difference]: Without dead ends: 67 [2018-10-04 09:16:39,554 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=991, Invalid=2791, Unknown=0, NotChecked=0, Total=3782 [2018-10-04 09:16:39,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-04 09:16:39,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-10-04 09:16:39,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-04 09:16:39,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-10-04 09:16:39,561 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 62 [2018-10-04 09:16:39,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:39,562 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-10-04 09:16:39,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-04 09:16:39,562 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-10-04 09:16:39,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-04 09:16:39,563 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:39,563 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1] [2018-10-04 09:16:39,563 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:39,564 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:39,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1059786035, now seen corresponding path program 16 times [2018-10-04 09:16:39,564 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:39,564 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:39,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:39,565 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:39,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:39,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:40,713 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:40,714 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:40,714 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:40,722 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:16:40,786 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:16:40,786 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:40,816 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:40,904 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:40,925 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:40,925 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2018-10-04 09:16:40,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-04 09:16:40,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-04 09:16:40,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=1122, Unknown=0, NotChecked=0, Total=1190 [2018-10-04 09:16:40,926 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 35 states. [2018-10-04 09:16:43,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:43,179 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-10-04 09:16:43,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-04 09:16:43,179 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 66 [2018-10-04 09:16:43,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:43,180 INFO L225 Difference]: With dead ends: 73 [2018-10-04 09:16:43,180 INFO L226 Difference]: Without dead ends: 71 [2018-10-04 09:16:43,183 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1121, Invalid=3169, Unknown=0, NotChecked=0, Total=4290 [2018-10-04 09:16:43,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-04 09:16:43,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-10-04 09:16:43,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-04 09:16:43,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-10-04 09:16:43,190 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 66 [2018-10-04 09:16:43,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:43,191 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-10-04 09:16:43,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-04 09:16:43,191 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-10-04 09:16:43,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-04 09:16:43,192 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:43,192 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1] [2018-10-04 09:16:43,192 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:43,193 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:43,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1756273471, now seen corresponding path program 17 times [2018-10-04 09:16:43,193 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:43,193 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:43,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:43,194 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:43,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:43,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:43,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:43,921 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:43,921 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:43,928 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:16:43,999 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-10-04 09:16:44,000 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:44,011 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:44,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:44,108 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:44,108 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2018-10-04 09:16:44,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-04 09:16:44,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-04 09:16:44,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=1260, Unknown=0, NotChecked=0, Total=1332 [2018-10-04 09:16:44,109 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 37 states. [2018-10-04 09:16:46,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:46,546 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2018-10-04 09:16:46,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-04 09:16:46,547 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 70 [2018-10-04 09:16:46,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:46,548 INFO L225 Difference]: With dead ends: 77 [2018-10-04 09:16:46,548 INFO L226 Difference]: Without dead ends: 75 [2018-10-04 09:16:46,550 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1259, Invalid=3571, Unknown=0, NotChecked=0, Total=4830 [2018-10-04 09:16:46,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-04 09:16:46,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-10-04 09:16:46,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-04 09:16:46,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-10-04 09:16:46,557 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 70 [2018-10-04 09:16:46,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:46,557 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-10-04 09:16:46,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-04 09:16:46,558 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-10-04 09:16:46,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-04 09:16:46,558 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:46,558 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1] [2018-10-04 09:16:46,559 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:46,559 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:46,559 INFO L82 PathProgramCache]: Analyzing trace with hash 362527925, now seen corresponding path program 18 times [2018-10-04 09:16:46,559 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:46,559 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:46,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:46,560 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:46,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:46,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:47,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:47,454 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:47,454 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:47,462 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:16:47,499 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 36 check-sat command(s) [2018-10-04 09:16:47,499 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:47,503 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:47,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:47,644 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:47,644 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2018-10-04 09:16:47,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-04 09:16:47,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-04 09:16:47,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=1406, Unknown=0, NotChecked=0, Total=1482 [2018-10-04 09:16:47,645 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 39 states. [2018-10-04 09:16:50,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:50,486 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2018-10-04 09:16:50,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-04 09:16:50,486 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 74 [2018-10-04 09:16:50,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:50,487 INFO L225 Difference]: With dead ends: 81 [2018-10-04 09:16:50,487 INFO L226 Difference]: Without dead ends: 79 [2018-10-04 09:16:50,490 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1405, Invalid=3997, Unknown=0, NotChecked=0, Total=5402 [2018-10-04 09:16:50,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-04 09:16:50,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-10-04 09:16:50,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-04 09:16:50,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-10-04 09:16:50,500 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 74 [2018-10-04 09:16:50,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:50,500 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-10-04 09:16:50,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-04 09:16:50,500 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-10-04 09:16:50,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-04 09:16:50,501 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:50,502 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1] [2018-10-04 09:16:50,502 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:50,502 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:50,502 INFO L82 PathProgramCache]: Analyzing trace with hash 911276713, now seen corresponding path program 19 times [2018-10-04 09:16:50,502 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:50,502 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:50,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:50,503 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:50,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:50,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:51,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:51,312 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:51,312 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:51,321 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:16:51,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:51,457 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:51,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:51,546 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:51,546 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2018-10-04 09:16:51,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-04 09:16:51,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-04 09:16:51,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1560, Unknown=0, NotChecked=0, Total=1640 [2018-10-04 09:16:51,547 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 41 states. [2018-10-04 09:16:54,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:54,758 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2018-10-04 09:16:54,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-04 09:16:54,759 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 78 [2018-10-04 09:16:54,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:54,759 INFO L225 Difference]: With dead ends: 85 [2018-10-04 09:16:54,760 INFO L226 Difference]: Without dead ends: 83 [2018-10-04 09:16:54,762 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1559, Invalid=4447, Unknown=0, NotChecked=0, Total=6006 [2018-10-04 09:16:54,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-04 09:16:54,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-10-04 09:16:54,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-04 09:16:54,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-10-04 09:16:54,768 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 78 [2018-10-04 09:16:54,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:54,768 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-10-04 09:16:54,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-04 09:16:54,768 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-10-04 09:16:54,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-04 09:16:54,769 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:54,769 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1] [2018-10-04 09:16:54,770 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:54,770 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:54,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1569595037, now seen corresponding path program 20 times [2018-10-04 09:16:54,770 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:54,770 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:54,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:54,771 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:16:54,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:54,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:55,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:55,684 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:55,684 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:55,693 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:16:55,803 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:16:55,804 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:55,859 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:55,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:55,961 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:55,961 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2018-10-04 09:16:55,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-04 09:16:55,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-04 09:16:55,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1722, Unknown=0, NotChecked=0, Total=1806 [2018-10-04 09:16:55,962 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 43 states. [2018-10-04 09:16:59,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:59,518 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2018-10-04 09:16:59,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-04 09:16:59,519 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 82 [2018-10-04 09:16:59,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:59,520 INFO L225 Difference]: With dead ends: 89 [2018-10-04 09:16:59,520 INFO L226 Difference]: Without dead ends: 87 [2018-10-04 09:16:59,523 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1721, Invalid=4921, Unknown=0, NotChecked=0, Total=6642 [2018-10-04 09:16:59,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-04 09:16:59,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-10-04 09:16:59,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-04 09:16:59,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-10-04 09:16:59,530 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 82 [2018-10-04 09:16:59,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:59,530 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-10-04 09:16:59,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-04 09:16:59,531 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-10-04 09:16:59,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-04 09:16:59,532 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:59,532 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1] [2018-10-04 09:16:59,532 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:59,532 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:59,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1729091439, now seen corresponding path program 21 times [2018-10-04 09:16:59,532 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:59,533 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:59,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:59,533 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:59,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:59,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:17:00,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:00,661 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:17:00,661 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:17:00,669 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:17:00,778 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-10-04 09:17:00,779 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:17:00,782 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:17:00,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:00,880 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:17:00,880 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2018-10-04 09:17:00,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-04 09:17:00,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-04 09:17:00,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1892, Unknown=0, NotChecked=0, Total=1980 [2018-10-04 09:17:00,881 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 45 states. [2018-10-04 09:17:04,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:17:04,851 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2018-10-04 09:17:04,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-04 09:17:04,852 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 86 [2018-10-04 09:17:04,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:17:04,854 INFO L225 Difference]: With dead ends: 93 [2018-10-04 09:17:04,854 INFO L226 Difference]: Without dead ends: 91 [2018-10-04 09:17:04,855 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1891, Invalid=5419, Unknown=0, NotChecked=0, Total=7310 [2018-10-04 09:17:04,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-04 09:17:04,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-10-04 09:17:04,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-04 09:17:04,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-10-04 09:17:04,860 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 86 [2018-10-04 09:17:04,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:17:04,860 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-10-04 09:17:04,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-04 09:17:04,861 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-10-04 09:17:04,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-04 09:17:04,861 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:17:04,861 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1] [2018-10-04 09:17:04,862 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:17:04,862 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:17:04,862 INFO L82 PathProgramCache]: Analyzing trace with hash -543942523, now seen corresponding path program 22 times [2018-10-04 09:17:04,862 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:17:04,862 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:17:04,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:04,863 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:17:04,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:04,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:17:06,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:06,013 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:17:06,013 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:17:06,021 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:17:06,060 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:17:06,061 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:17:06,067 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:17:06,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:06,192 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:17:06,192 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2018-10-04 09:17:06,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-04 09:17:06,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-04 09:17:06,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=2070, Unknown=0, NotChecked=0, Total=2162 [2018-10-04 09:17:06,193 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 47 states. [2018-10-04 09:17:10,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:17:10,636 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2018-10-04 09:17:10,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-04 09:17:10,636 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 90 [2018-10-04 09:17:10,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:17:10,638 INFO L225 Difference]: With dead ends: 97 [2018-10-04 09:17:10,638 INFO L226 Difference]: Without dead ends: 95 [2018-10-04 09:17:10,639 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=2069, Invalid=5941, Unknown=0, NotChecked=0, Total=8010 [2018-10-04 09:17:10,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-04 09:17:10,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-10-04 09:17:10,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-04 09:17:10,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-10-04 09:17:10,645 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 90 [2018-10-04 09:17:10,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:17:10,645 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-10-04 09:17:10,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-04 09:17:10,645 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-10-04 09:17:10,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-04 09:17:10,646 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:17:10,646 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1] [2018-10-04 09:17:10,646 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:17:10,646 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:17:10,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1377234553, now seen corresponding path program 23 times [2018-10-04 09:17:10,647 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:17:10,647 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:17:10,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:10,647 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:17:10,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:10,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:17:11,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:11,981 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:17:11,982 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:17:11,990 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:17:12,129 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-10-04 09:17:12,130 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:17:12,151 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:17:12,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:12,255 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:17:12,255 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2018-10-04 09:17:12,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-04 09:17:12,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-04 09:17:12,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=2256, Unknown=0, NotChecked=0, Total=2352 [2018-10-04 09:17:12,256 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 49 states. [2018-10-04 09:17:17,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:17:17,123 INFO L93 Difference]: Finished difference Result 101 states and 102 transitions. [2018-10-04 09:17:17,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-04 09:17:17,123 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 94 [2018-10-04 09:17:17,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:17:17,124 INFO L225 Difference]: With dead ends: 101 [2018-10-04 09:17:17,125 INFO L226 Difference]: Without dead ends: 99 [2018-10-04 09:17:17,126 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=2255, Invalid=6487, Unknown=0, NotChecked=0, Total=8742 [2018-10-04 09:17:17,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-04 09:17:17,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-10-04 09:17:17,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-04 09:17:17,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-10-04 09:17:17,133 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 94 [2018-10-04 09:17:17,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:17:17,133 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-10-04 09:17:17,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-04 09:17:17,133 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-10-04 09:17:17,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-04 09:17:17,133 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:17:17,134 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1] [2018-10-04 09:17:17,134 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:17:17,134 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:17:17,134 INFO L82 PathProgramCache]: Analyzing trace with hash 2056628845, now seen corresponding path program 24 times [2018-10-04 09:17:17,134 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:17:17,134 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:17:17,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:17,135 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:17:17,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:17,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:17:18,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:18,794 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:17:18,794 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:17:18,800 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:17:18,849 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 48 check-sat command(s) [2018-10-04 09:17:18,849 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:17:18,854 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:17:19,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:19,361 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:17:19,361 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2018-10-04 09:17:19,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-04 09:17:19,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-04 09:17:19,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=2450, Unknown=0, NotChecked=0, Total=2550 [2018-10-04 09:17:19,363 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 51 states. [2018-10-04 09:17:19,593 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 9 [2018-10-04 09:17:19,713 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-10-04 09:17:19,961 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 11 [2018-10-04 09:17:20,089 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 11 [2018-10-04 09:17:24,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:17:24,823 INFO L93 Difference]: Finished difference Result 105 states and 106 transitions. [2018-10-04 09:17:24,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-04 09:17:24,824 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 98 [2018-10-04 09:17:24,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:17:24,825 INFO L225 Difference]: With dead ends: 105 [2018-10-04 09:17:24,825 INFO L226 Difference]: Without dead ends: 103 [2018-10-04 09:17:24,827 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=2449, Invalid=7057, Unknown=0, NotChecked=0, Total=9506 [2018-10-04 09:17:24,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-04 09:17:24,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-10-04 09:17:24,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-04 09:17:24,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-10-04 09:17:24,835 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 98 [2018-10-04 09:17:24,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:17:24,835 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-10-04 09:17:24,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-04 09:17:24,836 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-10-04 09:17:24,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-04 09:17:24,836 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:17:24,836 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1] [2018-10-04 09:17:24,837 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:17:24,837 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:17:24,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1934799775, now seen corresponding path program 25 times [2018-10-04 09:17:24,837 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:17:24,837 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:17:24,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:24,838 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:17:24,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:24,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:17:26,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:26,175 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:17:26,175 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:17:26,183 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:17:26,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:17:26,472 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:17:26,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:26,582 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:17:26,582 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2018-10-04 09:17:26,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-04 09:17:26,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-04 09:17:26,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=2652, Unknown=0, NotChecked=0, Total=2756 [2018-10-04 09:17:26,583 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 53 states. [2018-10-04 09:17:26,827 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 9 [2018-10-04 09:17:26,952 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-04 09:17:27,079 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-04 09:17:27,210 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-10-04 09:17:27,341 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-10-04 09:17:32,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:17:32,447 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2018-10-04 09:17:32,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-04 09:17:32,448 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 102 [2018-10-04 09:17:32,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:17:32,449 INFO L225 Difference]: With dead ends: 109 [2018-10-04 09:17:32,449 INFO L226 Difference]: Without dead ends: 107 [2018-10-04 09:17:32,450 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=2651, Invalid=7651, Unknown=0, NotChecked=0, Total=10302 [2018-10-04 09:17:32,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-04 09:17:32,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-10-04 09:17:32,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-04 09:17:32,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-10-04 09:17:32,459 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 102 [2018-10-04 09:17:32,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:17:32,459 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-10-04 09:17:32,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-04 09:17:32,460 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-10-04 09:17:32,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-04 09:17:32,460 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:17:32,460 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1] [2018-10-04 09:17:32,461 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:17:32,461 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:17:32,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1518676907, now seen corresponding path program 26 times [2018-10-04 09:17:32,461 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:17:32,461 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:17:32,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:32,462 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:17:32,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:32,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:17:34,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:34,392 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:17:34,392 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:17:34,399 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:17:34,608 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:17:34,609 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:17:34,729 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:17:34,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:34,848 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:17:34,849 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2018-10-04 09:17:34,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-04 09:17:34,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-04 09:17:34,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=2862, Unknown=0, NotChecked=0, Total=2970 [2018-10-04 09:17:34,850 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 55 states. [2018-10-04 09:17:34,985 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 8 [2018-10-04 09:17:35,116 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 9 [2018-10-04 09:17:35,267 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-04 09:17:35,427 WARN L178 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-04 09:17:35,561 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-04 09:17:35,692 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-04 09:17:35,827 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-10-04 09:17:41,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:17:41,332 INFO L93 Difference]: Finished difference Result 113 states and 114 transitions. [2018-10-04 09:17:41,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-04 09:17:41,332 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 106 [2018-10-04 09:17:41,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:17:41,333 INFO L225 Difference]: With dead ends: 113 [2018-10-04 09:17:41,333 INFO L226 Difference]: Without dead ends: 111 [2018-10-04 09:17:41,334 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=2861, Invalid=8269, Unknown=0, NotChecked=0, Total=11130 [2018-10-04 09:17:41,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-04 09:17:41,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-10-04 09:17:41,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-10-04 09:17:41,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-10-04 09:17:41,339 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 106 [2018-10-04 09:17:41,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:17:41,340 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-10-04 09:17:41,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-04 09:17:41,340 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-10-04 09:17:41,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-04 09:17:41,340 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:17:41,340 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1] [2018-10-04 09:17:41,341 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:17:41,341 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:17:41,341 INFO L82 PathProgramCache]: Analyzing trace with hash 194724425, now seen corresponding path program 27 times [2018-10-04 09:17:41,341 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:17:41,341 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:17:41,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:41,342 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:17:41,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:41,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:17:42,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:42,882 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:17:42,882 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:17:42,892 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:17:42,949 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2018-10-04 09:17:42,949 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:17:42,955 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:17:43,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:43,124 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:17:43,124 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 56 [2018-10-04 09:17:43,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-04 09:17:43,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-04 09:17:43,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=3080, Unknown=0, NotChecked=0, Total=3192 [2018-10-04 09:17:43,125 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 57 states. [2018-10-04 09:17:43,264 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 8 [2018-10-04 09:17:43,414 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 9 [2018-10-04 09:17:43,556 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-04 09:17:43,697 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-04 09:17:43,843 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-04 09:17:44,009 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-04 09:17:44,160 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-04 09:17:44,447 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-10-04 09:17:50,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:17:50,245 INFO L93 Difference]: Finished difference Result 117 states and 118 transitions. [2018-10-04 09:17:50,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-04 09:17:50,246 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 110 [2018-10-04 09:17:50,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:17:50,246 INFO L225 Difference]: With dead ends: 117 [2018-10-04 09:17:50,247 INFO L226 Difference]: Without dead ends: 115 [2018-10-04 09:17:50,247 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1379 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=3079, Invalid=8911, Unknown=0, NotChecked=0, Total=11990 [2018-10-04 09:17:50,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-10-04 09:17:50,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-10-04 09:17:50,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-04 09:17:50,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-10-04 09:17:50,253 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 110 [2018-10-04 09:17:50,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:17:50,254 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-10-04 09:17:50,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-04 09:17:50,254 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-10-04 09:17:50,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-04 09:17:50,254 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:17:50,254 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1] [2018-10-04 09:17:50,254 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:17:50,255 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:17:50,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1865127485, now seen corresponding path program 28 times [2018-10-04 09:17:50,255 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:17:50,255 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:17:50,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:50,255 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:17:50,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:50,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:17:52,017 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:52,017 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:17:52,017 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:17:52,026 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:17:52,277 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:17:52,278 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:17:52,432 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:17:52,538 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:52,558 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:17:52,559 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 58 [2018-10-04 09:17:52,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-04 09:17:52,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-04 09:17:52,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=3306, Unknown=0, NotChecked=0, Total=3422 [2018-10-04 09:17:52,560 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 59 states. [2018-10-04 09:17:52,702 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 8 [2018-10-04 09:17:52,846 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 9 [2018-10-04 09:17:52,996 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-04 09:17:53,142 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-04 09:17:53,291 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-04 09:17:53,432 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-04 09:17:53,579 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-04 09:17:53,729 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-04 09:17:53,881 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-04 09:17:54,041 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-04 09:17:54,211 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-10-04 09:17:54,379 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-10-04 09:18:00,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:18:00,505 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2018-10-04 09:18:00,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-04 09:18:00,505 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 114 [2018-10-04 09:18:00,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:18:00,507 INFO L225 Difference]: With dead ends: 121 [2018-10-04 09:18:00,507 INFO L226 Difference]: Without dead ends: 119 [2018-10-04 09:18:00,508 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1486 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=3305, Invalid=9577, Unknown=0, NotChecked=0, Total=12882 [2018-10-04 09:18:00,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-10-04 09:18:00,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-10-04 09:18:00,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-04 09:18:00,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-10-04 09:18:00,517 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 114 [2018-10-04 09:18:00,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:18:00,517 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-10-04 09:18:00,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-04 09:18:00,518 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-10-04 09:18:00,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-04 09:18:00,518 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:18:00,518 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 1, 1, 1] [2018-10-04 09:18:00,519 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:18:00,519 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:18:00,519 INFO L82 PathProgramCache]: Analyzing trace with hash 701026353, now seen corresponding path program 29 times [2018-10-04 09:18:00,519 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:18:00,519 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:18:00,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:18:00,520 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:18:00,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:18:00,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:18:02,425 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:18:02,426 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:18:02,426 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:18:02,433 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:18:02,686 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 58 check-sat command(s) [2018-10-04 09:18:02,687 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:18:02,724 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:18:02,830 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:18:02,850 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:18:02,850 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 60 [2018-10-04 09:18:02,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-04 09:18:02,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-04 09:18:02,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=3540, Unknown=0, NotChecked=0, Total=3660 [2018-10-04 09:18:02,852 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 61 states. [2018-10-04 09:18:03,013 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 8 [2018-10-04 09:18:03,162 WARN L178 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 9 [2018-10-04 09:18:03,310 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-04 09:18:03,465 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-04 09:18:03,620 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-04 09:18:03,779 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-04 09:18:03,940 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-04 09:18:04,098 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-04 09:18:04,258 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-04 09:18:04,453 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-04 09:18:04,629 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-04 09:18:04,792 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-04 09:18:04,959 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-10-04 09:18:11,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:18:11,531 INFO L93 Difference]: Finished difference Result 125 states and 126 transitions. [2018-10-04 09:18:11,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-04 09:18:11,532 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 118 [2018-10-04 09:18:11,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:18:11,533 INFO L225 Difference]: With dead ends: 125 [2018-10-04 09:18:11,533 INFO L226 Difference]: Without dead ends: 123 [2018-10-04 09:18:11,535 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1597 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=3539, Invalid=10267, Unknown=0, NotChecked=0, Total=13806 [2018-10-04 09:18:11,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-10-04 09:18:11,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-10-04 09:18:11,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-10-04 09:18:11,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-10-04 09:18:11,544 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 118 [2018-10-04 09:18:11,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:18:11,544 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-10-04 09:18:11,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-04 09:18:11,545 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-10-04 09:18:11,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-10-04 09:18:11,545 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:18:11,545 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 1, 1, 1] [2018-10-04 09:18:11,546 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:18:11,546 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:18:11,546 INFO L82 PathProgramCache]: Analyzing trace with hash 2123362341, now seen corresponding path program 30 times [2018-10-04 09:18:11,546 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:18:11,546 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:18:11,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:18:11,547 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:18:11,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:18:11,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:18:14,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:18:14,170 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:18:14,170 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:18:14,180 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:18:14,245 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 60 check-sat command(s) [2018-10-04 09:18:14,245 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:18:14,252 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:18:14,373 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:18:14,394 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:18:14,394 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 62 [2018-10-04 09:18:14,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-04 09:18:14,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-04 09:18:14,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=3782, Unknown=0, NotChecked=0, Total=3906 [2018-10-04 09:18:14,395 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 63 states. [2018-10-04 09:18:14,558 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 8 [2018-10-04 09:18:14,735 WARN L178 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 9 [2018-10-04 09:18:14,922 WARN L178 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-04 09:18:15,086 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-04 09:18:15,250 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-04 09:18:15,417 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-04 09:18:15,588 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-04 09:18:15,755 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-04 09:18:15,914 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-04 09:18:16,077 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-04 09:18:16,241 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-04 09:18:16,414 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-04 09:18:16,579 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-04 09:18:16,927 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-10-04 09:18:23,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:18:23,464 INFO L93 Difference]: Finished difference Result 129 states and 130 transitions. [2018-10-04 09:18:23,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-04 09:18:23,465 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 122 [2018-10-04 09:18:23,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:18:23,466 INFO L225 Difference]: With dead ends: 129 [2018-10-04 09:18:23,466 INFO L226 Difference]: Without dead ends: 127 [2018-10-04 09:18:23,467 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1712 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=3781, Invalid=10981, Unknown=0, NotChecked=0, Total=14762 [2018-10-04 09:18:23,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-10-04 09:18:23,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-10-04 09:18:23,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-10-04 09:18:23,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2018-10-04 09:18:23,474 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 122 [2018-10-04 09:18:23,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:18:23,474 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2018-10-04 09:18:23,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-04 09:18:23,475 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2018-10-04 09:18:23,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-10-04 09:18:23,475 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:18:23,475 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 1, 1, 1] [2018-10-04 09:18:23,475 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:18:23,475 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:18:23,476 INFO L82 PathProgramCache]: Analyzing trace with hash -635570663, now seen corresponding path program 31 times [2018-10-04 09:18:23,476 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:18:23,476 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:18:23,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:18:23,477 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:18:23,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:18:23,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:18:26,029 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:18:26,029 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:18:26,029 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:18:26,037 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:18:26,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:18:26,580 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:18:26,685 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:18:26,705 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:18:26,706 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 64 [2018-10-04 09:18:26,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-04 09:18:26,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-04 09:18:26,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=4032, Unknown=0, NotChecked=0, Total=4160 [2018-10-04 09:18:26,707 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 65 states. [2018-10-04 09:18:26,878 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 8 [2018-10-04 09:18:27,040 WARN L178 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 9 [2018-10-04 09:18:27,211 WARN L178 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-04 09:18:27,385 WARN L178 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-04 09:18:27,561 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-04 09:18:27,726 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-04 09:18:27,900 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-04 09:18:28,073 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-04 09:18:28,254 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-04 09:18:28,438 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-04 09:18:28,617 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-04 09:18:28,800 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-04 09:18:28,975 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-04 09:18:29,152 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-04 09:18:29,345 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-04 09:18:30,098 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 11 [2018-10-04 09:18:30,301 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 11 [2018-10-04 09:18:30,685 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 11 [2018-10-04 09:18:36,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:18:36,601 INFO L93 Difference]: Finished difference Result 133 states and 134 transitions. [2018-10-04 09:18:36,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-04 09:18:36,601 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 126 [2018-10-04 09:18:36,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:18:36,603 INFO L225 Difference]: With dead ends: 133 [2018-10-04 09:18:36,603 INFO L226 Difference]: Without dead ends: 131 [2018-10-04 09:18:36,604 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1831 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=4031, Invalid=11719, Unknown=0, NotChecked=0, Total=15750 [2018-10-04 09:18:36,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-04 09:18:36,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-10-04 09:18:36,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-10-04 09:18:36,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-10-04 09:18:36,613 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 126 [2018-10-04 09:18:36,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:18:36,613 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-10-04 09:18:36,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-04 09:18:36,613 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-10-04 09:18:36,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-10-04 09:18:36,614 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:18:36,614 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 1, 1, 1] [2018-10-04 09:18:36,614 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:18:36,614 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:18:36,615 INFO L82 PathProgramCache]: Analyzing trace with hash 311419405, now seen corresponding path program 32 times [2018-10-04 09:18:36,615 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:18:36,615 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:18:36,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:18:36,616 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:18:36,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:18:36,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:18:38,768 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:18:38,768 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:18:38,768 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:18:38,777 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:18:39,151 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:18:39,151 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:18:39,376 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:18:39,680 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:18:39,700 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:18:39,700 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 66 [2018-10-04 09:18:39,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-04 09:18:39,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-04 09:18:39,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=4290, Unknown=0, NotChecked=0, Total=4422 [2018-10-04 09:18:39,701 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 67 states. [2018-10-04 09:18:39,916 WARN L178 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 8 [2018-10-04 09:18:40,084 WARN L178 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 9 [2018-10-04 09:18:40,267 WARN L178 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-04 09:18:40,458 WARN L178 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-04 09:18:40,643 WARN L178 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-04 09:18:40,815 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-04 09:18:40,991 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-04 09:18:41,169 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-04 09:18:41,354 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-04 09:18:41,543 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-04 09:18:41,735 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-04 09:18:41,919 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-04 09:18:42,109 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-04 09:18:42,292 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-04 09:18:42,497 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-04 09:18:42,697 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-04 09:18:42,897 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-04 09:18:43,091 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-04 09:18:43,293 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-10-04 09:18:50,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:18:50,301 INFO L93 Difference]: Finished difference Result 137 states and 138 transitions. [2018-10-04 09:18:50,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-04 09:18:50,302 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 130 [2018-10-04 09:18:50,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:18:50,303 INFO L225 Difference]: With dead ends: 137 [2018-10-04 09:18:50,303 INFO L226 Difference]: Without dead ends: 135 [2018-10-04 09:18:50,305 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1954 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=4289, Invalid=12481, Unknown=0, NotChecked=0, Total=16770 [2018-10-04 09:18:50,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-10-04 09:18:50,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-10-04 09:18:50,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-10-04 09:18:50,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2018-10-04 09:18:50,312 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 130 [2018-10-04 09:18:50,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:18:50,313 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2018-10-04 09:18:50,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-04 09:18:50,313 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2018-10-04 09:18:50,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-10-04 09:18:50,313 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:18:50,313 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 1, 1, 1] [2018-10-04 09:18:50,314 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:18:50,314 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:18:50,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1484606463, now seen corresponding path program 33 times [2018-10-04 09:18:50,314 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:18:50,314 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:18:50,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:18:50,315 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:18:50,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:18:50,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:18:52,727 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:18:52,728 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:18:52,728 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:18:52,734 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:18:52,805 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 66 check-sat command(s) [2018-10-04 09:18:52,805 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:18:52,812 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:18:53,074 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:18:53,107 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:18:53,107 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 68 [2018-10-04 09:18:53,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-04 09:18:53,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-04 09:18:53,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=4556, Unknown=0, NotChecked=0, Total=4692 [2018-10-04 09:18:53,108 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 69 states. [2018-10-04 09:18:53,351 WARN L178 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 8 [2018-10-04 09:18:53,533 WARN L178 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 9 [2018-10-04 09:18:53,719 WARN L178 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-04 09:18:53,919 WARN L178 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-04 09:18:54,108 WARN L178 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-04 09:18:54,291 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-04 09:18:54,481 WARN L178 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-04 09:18:54,675 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-04 09:18:54,872 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-04 09:18:55,077 WARN L178 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-04 09:18:55,275 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-04 09:18:55,469 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-04 09:18:55,688 WARN L178 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-04 09:18:55,892 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-04 09:18:56,100 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-04 09:18:56,307 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-04 09:18:56,512 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-04 09:18:56,725 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-04 09:18:56,945 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-04 09:18:57,153 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-04 09:18:57,358 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-10-04 09:19:04,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:19:04,674 INFO L93 Difference]: Finished difference Result 141 states and 142 transitions. [2018-10-04 09:19:04,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-04 09:19:04,674 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 134 [2018-10-04 09:19:04,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:19:04,676 INFO L225 Difference]: With dead ends: 141 [2018-10-04 09:19:04,676 INFO L226 Difference]: Without dead ends: 139 [2018-10-04 09:19:04,677 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2081 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=4555, Invalid=13267, Unknown=0, NotChecked=0, Total=17822 [2018-10-04 09:19:04,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-10-04 09:19:04,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-10-04 09:19:04,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-10-04 09:19:04,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2018-10-04 09:19:04,685 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 134 [2018-10-04 09:19:04,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:19:04,685 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2018-10-04 09:19:04,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-04 09:19:04,686 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2018-10-04 09:19:04,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-10-04 09:19:04,686 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:19:04,686 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 1, 1, 1] [2018-10-04 09:19:04,687 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:19:04,687 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:19:04,687 INFO L82 PathProgramCache]: Analyzing trace with hash 34827253, now seen corresponding path program 34 times [2018-10-04 09:19:04,687 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:19:04,687 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:19:04,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:19:04,688 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:19:04,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:19:04,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:19:07,550 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:19:07,551 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:19:07,551 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:19:07,558 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:19:07,598 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:19:07,598 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:19:07,601 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:19:07,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:19:07,783 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:19:07,783 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 70 [2018-10-04 09:19:07,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-04 09:19:07,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-04 09:19:07,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=4830, Unknown=0, NotChecked=0, Total=4970 [2018-10-04 09:19:07,785 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 71 states. [2018-10-04 09:19:08,054 WARN L178 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 8 [2018-10-04 09:19:08,242 WARN L178 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 9 [2018-10-04 09:19:08,433 WARN L178 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-10-04 09:19:08,624 WARN L178 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-10-04 09:19:08,821 WARN L178 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-04 09:19:09,013 WARN L178 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-04 09:19:09,213 WARN L178 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-04 09:19:09,412 WARN L178 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-04 09:19:09,620 WARN L178 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-04 09:19:09,832 WARN L178 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-04 09:19:10,040 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-04 09:19:10,251 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-04 09:19:10,456 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-04 09:19:10,662 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-04 09:19:10,876 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-04 09:19:11,119 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-04 09:19:11,340 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-04 09:19:11,565 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-04 09:19:11,786 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-04 09:19:12,008 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-04 09:19:12,234 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-04 09:19:12,447 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-04 09:19:20,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:19:20,183 INFO L93 Difference]: Finished difference Result 145 states and 146 transitions. [2018-10-04 09:19:20,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-04 09:19:20,183 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 138 [2018-10-04 09:19:20,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:19:20,184 INFO L225 Difference]: With dead ends: 145 [2018-10-04 09:19:20,185 INFO L226 Difference]: Without dead ends: 143 [2018-10-04 09:19:20,186 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2212 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=4829, Invalid=14077, Unknown=0, NotChecked=0, Total=18906 [2018-10-04 09:19:20,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-10-04 09:19:20,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-10-04 09:19:20,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-10-04 09:19:20,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-10-04 09:19:20,193 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 138 [2018-10-04 09:19:20,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:19:20,193 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-10-04 09:19:20,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-04 09:19:20,193 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-10-04 09:19:20,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-10-04 09:19:20,194 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:19:20,194 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 1, 1, 1] [2018-10-04 09:19:20,194 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:19:20,194 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:19:20,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1260451351, now seen corresponding path program 35 times [2018-10-04 09:19:20,194 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:19:20,194 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:19:20,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:19:20,195 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:19:20,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:19:20,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:19:23,107 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:19:23,107 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:19:23,107 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:19:23,114 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:19:23,534 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 70 check-sat command(s) [2018-10-04 09:19:23,534 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:19:23,594 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:19:23,723 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:19:23,743 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:19:23,744 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 72 [2018-10-04 09:19:23,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-04 09:19:23,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-04 09:19:23,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=5112, Unknown=0, NotChecked=0, Total=5256 [2018-10-04 09:19:23,745 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 73 states. [2018-10-04 09:19:23,953 WARN L178 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 8 [2018-10-04 09:19:24,145 WARN L178 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 9 [2018-10-04 09:19:24,348 WARN L178 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-10-04 09:19:24,550 WARN L178 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-10-04 09:19:24,761 WARN L178 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-10-04 09:19:24,961 WARN L178 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-10-04 09:19:25,166 WARN L178 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-04 09:19:25,371 WARN L178 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-04 09:19:25,585 WARN L178 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-04 09:19:25,800 WARN L178 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-04 09:19:26,012 WARN L178 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-04 09:19:26,235 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-04 09:19:26,478 WARN L178 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-04 09:19:26,700 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-04 09:19:26,928 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-04 09:19:27,158 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-04 09:19:27,387 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-04 09:19:27,615 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-04 09:19:27,847 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-04 09:19:28,078 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-04 09:19:28,316 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-04 09:19:28,552 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-04 09:19:28,786 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-04 09:19:37,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:19:37,281 INFO L93 Difference]: Finished difference Result 149 states and 150 transitions. [2018-10-04 09:19:37,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-04 09:19:37,281 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 142 [2018-10-04 09:19:37,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:19:37,283 INFO L225 Difference]: With dead ends: 149 [2018-10-04 09:19:37,283 INFO L226 Difference]: Without dead ends: 147 [2018-10-04 09:19:37,284 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2347 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=5111, Invalid=14911, Unknown=0, NotChecked=0, Total=20022 [2018-10-04 09:19:37,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-10-04 09:19:37,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-10-04 09:19:37,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-10-04 09:19:37,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2018-10-04 09:19:37,293 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 142 [2018-10-04 09:19:37,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:19:37,294 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2018-10-04 09:19:37,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-04 09:19:37,294 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2018-10-04 09:19:37,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-10-04 09:19:37,295 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:19:37,295 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 1, 1, 1] [2018-10-04 09:19:37,295 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:19:37,295 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:19:37,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1140683299, now seen corresponding path program 36 times [2018-10-04 09:19:37,296 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:19:37,296 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:19:37,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:19:37,296 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:19:37,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:19:37,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:19:40,175 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:19:40,175 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:19:40,175 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:19:40,182 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:19:40,264 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 72 check-sat command(s) [2018-10-04 09:19:40,264 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:19:40,272 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:19:40,408 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:19:40,428 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:19:40,429 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 74 [2018-10-04 09:19:40,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-04 09:19:40,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-04 09:19:40,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=5402, Unknown=0, NotChecked=0, Total=5550 [2018-10-04 09:19:40,430 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 75 states. [2018-10-04 09:19:40,740 WARN L178 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 8 [2018-10-04 09:19:40,951 WARN L178 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 9 [2018-10-04 09:19:41,163 WARN L178 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-10-04 09:19:41,381 WARN L178 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-10-04 09:19:41,603 WARN L178 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-10-04 09:19:41,835 WARN L178 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-10-04 09:19:42,056 WARN L178 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-10-04 09:19:42,274 WARN L178 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-10-04 09:19:42,501 WARN L178 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-04 09:19:42,732 WARN L178 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-04 09:19:42,956 WARN L178 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-04 09:19:43,194 WARN L178 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-04 09:19:43,429 WARN L178 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-04 09:19:43,658 WARN L178 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-04 09:19:43,902 WARN L178 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-04 09:19:44,144 WARN L178 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-04 09:19:44,381 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-04 09:19:44,618 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-04 09:19:44,863 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-04 09:19:45,111 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-04 09:19:45,358 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-04 09:19:45,592 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-04 09:19:45,841 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-04 09:19:46,093 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-04 09:19:46,342 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-04 09:19:46,574 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-04 09:19:46,812 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-10-04 09:19:47,062 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-10-04 09:19:54,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:19:54,971 INFO L93 Difference]: Finished difference Result 153 states and 154 transitions. [2018-10-04 09:19:54,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-04 09:19:54,972 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 146 [2018-10-04 09:19:54,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:19:54,973 INFO L225 Difference]: With dead ends: 153 [2018-10-04 09:19:54,973 INFO L226 Difference]: Without dead ends: 151 [2018-10-04 09:19:54,974 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2486 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=5401, Invalid=15769, Unknown=0, NotChecked=0, Total=21170 [2018-10-04 09:19:54,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-10-04 09:19:54,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-10-04 09:19:54,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-10-04 09:19:54,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2018-10-04 09:19:54,988 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 146 [2018-10-04 09:19:54,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:19:54,989 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2018-10-04 09:19:54,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-04 09:19:54,989 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2018-10-04 09:19:54,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-10-04 09:19:54,990 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:19:54,990 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 1, 1, 1] [2018-10-04 09:19:54,990 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:19:54,990 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:19:54,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1122306095, now seen corresponding path program 37 times [2018-10-04 09:19:54,991 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:19:54,991 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:19:54,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:19:54,991 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:19:54,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:19:55,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:19:59,555 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:19:59,556 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:19:59,556 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:19:59,563 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:20:00,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:20:00,747 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:20:00,881 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:20:00,900 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:20:00,900 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 76 [2018-10-04 09:20:00,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-04 09:20:00,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-04 09:20:00,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=5700, Unknown=0, NotChecked=0, Total=5852 [2018-10-04 09:20:00,901 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 77 states. [2018-10-04 09:20:01,126 WARN L178 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 8 [2018-10-04 09:20:01,334 WARN L178 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 9 [2018-10-04 09:20:01,567 WARN L178 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-10-04 09:20:01,793 WARN L178 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-10-04 09:20:02,019 WARN L178 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-10-04 09:20:02,270 WARN L178 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-10-04 09:20:02,518 WARN L178 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-10-04 09:20:02,748 WARN L178 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-10-04 09:20:02,982 WARN L178 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-10-04 09:20:03,227 WARN L178 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-10-04 09:20:03,469 WARN L178 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-04 09:20:03,711 WARN L178 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-04 09:20:03,944 WARN L178 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-04 09:20:04,170 WARN L178 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-04 09:20:04,414 WARN L178 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-04 09:20:04,663 WARN L178 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-04 09:20:04,924 WARN L178 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-04 09:20:05,181 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-04 09:20:05,429 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-04 09:20:05,691 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-04 09:20:05,957 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-04 09:20:06,209 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-04 09:20:06,464 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-04 09:20:06,720 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-04 09:20:06,976 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-04 09:20:07,249 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-04 09:20:07,548 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-04 09:20:07,798 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-04 09:20:08,050 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-10-04 09:20:14,731 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 11 [2018-10-04 09:20:16,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:20:16,800 INFO L93 Difference]: Finished difference Result 157 states and 158 transitions. [2018-10-04 09:20:16,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-04 09:20:16,800 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 150 [2018-10-04 09:20:16,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:20:16,802 INFO L225 Difference]: With dead ends: 157 [2018-10-04 09:20:16,802 INFO L226 Difference]: Without dead ends: 155 [2018-10-04 09:20:16,803 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2629 ImplicationChecksByTransitivity, 19.7s TimeCoverageRelationStatistics Valid=5699, Invalid=16651, Unknown=0, NotChecked=0, Total=22350 [2018-10-04 09:20:16,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-10-04 09:20:16,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-10-04 09:20:16,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-10-04 09:20:16,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2018-10-04 09:20:16,813 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 150 [2018-10-04 09:20:16,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:20:16,813 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2018-10-04 09:20:16,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-04 09:20:16,814 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2018-10-04 09:20:16,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-10-04 09:20:16,814 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:20:16,815 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 1, 1, 1] [2018-10-04 09:20:16,815 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:20:16,815 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:20:16,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1195722693, now seen corresponding path program 38 times [2018-10-04 09:20:16,815 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:20:16,815 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:20:16,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:20:16,816 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:20:16,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:20:17,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:20:20,337 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:20:20,337 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:20:20,338 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:20:20,345 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:20:20,940 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:20:20,940 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:20:21,313 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:20:21,444 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:20:21,463 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:20:21,464 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 78 [2018-10-04 09:20:21,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-10-04 09:20:21,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-10-04 09:20:21,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=6006, Unknown=0, NotChecked=0, Total=6162 [2018-10-04 09:20:21,465 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 79 states. [2018-10-04 09:20:21,725 WARN L178 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 8 [2018-10-04 09:20:21,940 WARN L178 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 9 [2018-10-04 09:20:22,170 WARN L178 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-10-04 09:20:22,408 WARN L178 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-10-04 09:20:22,638 WARN L178 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-10-04 09:20:22,904 WARN L178 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-10-04 09:20:23,150 WARN L178 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-10-04 09:20:23,399 WARN L178 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-10-04 09:20:23,652 WARN L178 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-10-04 09:20:23,903 WARN L178 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-10-04 09:20:24,150 WARN L178 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-10-04 09:20:24,400 WARN L178 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-10-04 09:20:24,649 WARN L178 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-04 09:20:24,890 WARN L178 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-04 09:20:25,152 WARN L178 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-04 09:20:25,414 WARN L178 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-04 09:20:25,683 WARN L178 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-04 09:20:25,948 WARN L178 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 Received shutdown request... [2018-10-04 09:20:25,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-04 09:20:25,990 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-04 09:20:25,995 WARN L205 ceAbstractionStarter]: Timeout [2018-10-04 09:20:25,995 INFO L202 PluginConnector]: Adding new model count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.10 09:20:25 BoogieIcfgContainer [2018-10-04 09:20:25,996 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-04 09:20:25,996 INFO L168 Benchmark]: Toolchain (without parser) took 251677.15 ms. Allocated memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: -172.0 MB). Free memory was 1.4 GB in the beginning and 989.1 MB in the end (delta: 441.8 MB). Peak memory consumption was 269.9 MB. Max. memory is 7.1 GB. [2018-10-04 09:20:25,997 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.16 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 09:20:25,997 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.46 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 09:20:25,997 INFO L168 Benchmark]: Boogie Preprocessor took 23.00 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 09:20:25,998 INFO L168 Benchmark]: RCFGBuilder took 294.43 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-04 09:20:25,998 INFO L168 Benchmark]: TraceAbstraction took 251312.22 ms. Allocated memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: -172.0 MB). Free memory was 1.4 GB in the beginning and 989.1 MB in the end (delta: 420.7 MB). Peak memory consumption was 248.7 MB. Max. memory is 7.1 GB. [2018-10-04 09:20:25,999 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 0.16 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 43.46 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 23.00 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 294.43 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 251312.22 ms. Allocated memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: -172.0 MB). Free memory was 1.4 GB in the beginning and 989.1 MB in the end (delta: 420.7 MB). Peak memory consumption was 248.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 38]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 38). Cancelled while BasicCegarLoop was constructing difference of abstraction (155states) and FLOYD_HOARE automaton (currently 20 states, 79 states before enhancement), while PredicateComparison was comparing new predicate (quantifier-free) to 97 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 251.2s OverallTime, 39 OverallIterations, 76 TraceHistogramMax, 186.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 192 SDtfs, 0 SDslu, 2912 SDs, 0 SdLazy, 3065 SolverSat, 1443 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5911 GetRequests, 3003 SyntacticMatches, 0 SemanticMatches, 2907 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33279 ImplicationChecksByTransitivity, 228.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=155occurred in iteration=38, 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, 38 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 9.0s SatisfiabilityAnalysisTime, 53.3s InterpolantComputationTime, 6084 NumberOfCodeBlocks, 6084 NumberOfCodeBlocksAsserted, 780 NumberOfCheckSat, 6007 ConstructedInterpolants, 0 QuantifiedInterpolants, 3090757 SizeOfPredicates, 76 NumberOfNonLiveVariables, 6422 ConjunctsInSsa, 1558 ConjunctsInUnsatCore, 77 InterpolantComputations, 1 PerfectInterpolantSequences, 0/149188 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/count_by_k.i_3.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-04_09-20-26-007.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/count_by_k.i_3.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-04_09-20-26-007.csv Completed graceful shutdown