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/20170319-ConjunctivePathPrograms/count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cc990c [2018-09-30 23:17:30,943 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 23:17:30,945 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 23:17:30,959 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 23:17:30,959 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 23:17:30,960 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 23:17:30,962 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 23:17:30,963 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 23:17:30,965 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 23:17:30,966 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 23:17:30,970 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-30 23:17:30,970 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-30 23:17:30,971 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-30 23:17:30,972 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-30 23:17:30,975 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-30 23:17:30,975 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-30 23:17:30,976 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-30 23:17:30,978 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-30 23:17:30,980 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-30 23:17:30,981 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-30 23:17:30,982 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-30 23:17:30,983 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-30 23:17:30,985 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-30 23:17:30,985 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-30 23:17:30,985 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-30 23:17:30,986 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-30 23:17:30,987 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-30 23:17:30,988 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-30 23:17:30,989 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-30 23:17:30,991 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-30 23:17:30,992 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-30 23:17:30,992 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-30 23:17:30,993 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-30 23:17:30,993 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-30 23:17:30,994 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-30 23:17:30,996 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-30 23:17:30,997 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-30 23:17:31,019 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 23:17:31,019 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 23:17:31,020 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 23:17:31,021 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 23:17:31,022 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 23:17:31,022 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 23:17:31,022 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 23:17:31,022 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 23:17:31,023 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 23:17:31,023 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 23:17:31,023 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 23:17:31,023 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 23:17:31,023 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 23:17:31,024 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 23:17:31,024 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 23:17:31,025 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 23:17:31,025 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 23:17:31,025 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 23:17:31,025 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 23:17:31,025 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 23:17:31,026 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 23:17:31,026 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 23:17:31,026 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 23:17:31,027 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 23:17:31,028 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 23:17:31,028 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 23:17:31,028 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 23:17:31,028 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 23:17:31,028 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 23:17:31,029 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 23:17:31,077 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 23:17:31,092 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 23:17:31,097 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 23:17:31,099 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 23:17:31,100 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 23:17:31,101 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl [2018-09-30 23:17:31,101 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl' [2018-09-30 23:17:31,155 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 23:17:31,159 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 23:17:31,159 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 23:17:31,159 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 23:17:31,160 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 23:17:31,181 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:17:31" (1/1) ... [2018-09-30 23:17:31,193 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:17:31" (1/1) ... [2018-09-30 23:17:31,201 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 23:17:31,202 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 23:17:31,202 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 23:17:31,202 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 23:17:31,214 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:17:31" (1/1) ... [2018-09-30 23:17:31,214 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:17:31" (1/1) ... [2018-09-30 23:17:31,215 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:17:31" (1/1) ... [2018-09-30 23:17:31,215 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:17:31" (1/1) ... [2018-09-30 23:17:31,219 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:17:31" (1/1) ... [2018-09-30 23:17:31,221 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:17:31" (1/1) ... [2018-09-30 23:17:31,222 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:17:31" (1/1) ... [2018-09-30 23:17:31,224 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 23:17:31,225 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 23:17:31,225 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 23:17:31,225 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 23:17:31,226 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:17:31" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 23:17:31,297 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-09-30 23:17:31,298 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-30 23:17:31,298 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-30 23:17:31,492 INFO L348 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-30 23:17:31,493 INFO L202 PluginConnector]: Adding new model count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 11:17:31 BoogieIcfgContainer [2018-09-30 23:17:31,493 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 23:17:31,494 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 23:17:31,494 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 23:17:31,497 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 23:17:31,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:17:31" (1/2) ... [2018-09-30 23:17:31,499 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61c5bf7e and model type count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 11:17:31, skipping insertion in model container [2018-09-30 23:17:31,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 11:17:31" (2/2) ... [2018-09-30 23:17:31,501 INFO L112 eAbstractionObserver]: Analyzing ICFG count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl [2018-09-30 23:17:31,509 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 23:17:31,517 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 23:17:31,565 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 23:17:31,566 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 23:17:31,566 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 23:17:31,566 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 23:17:31,566 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 23:17:31,567 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 23:17:31,567 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 23:17:31,567 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 23:17:31,567 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 23:17:31,580 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-09-30 23:17:31,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-30 23:17:31,587 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:17:31,588 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-30 23:17:31,589 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:17:31,598 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:17:31,599 INFO L82 PathProgramCache]: Analyzing trace with hash 30017, now seen corresponding path program 1 times [2018-09-30 23:17:31,601 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:17:31,602 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:17:31,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:17:31,650 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:17:31,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:17:31,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:17:31,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:17:31,806 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 23:17:31,806 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-30 23:17:31,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 23:17:31,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 23:17:31,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 23:17:31,824 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-09-30 23:17:31,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:17:31,875 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2018-09-30 23:17:31,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 23:17:31,877 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-30 23:17:31,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:17:31,889 INFO L225 Difference]: With dead ends: 9 [2018-09-30 23:17:31,889 INFO L226 Difference]: Without dead ends: 5 [2018-09-30 23:17:31,893 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 23:17:31,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-09-30 23:17:31,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-09-30 23:17:31,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-09-30 23:17:31,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-09-30 23:17:31,940 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-09-30 23:17:31,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:17:31,941 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-09-30 23:17:31,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 23:17:31,941 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-09-30 23:17:31,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-30 23:17:31,942 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:17:31,942 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-30 23:17:31,942 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:17:31,942 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:17:31,943 INFO L82 PathProgramCache]: Analyzing trace with hash 928552, now seen corresponding path program 1 times [2018-09-30 23:17:31,943 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:17:31,943 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:17:31,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:17:31,944 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:17:31,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:17:31,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:17:32,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:17:32,082 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:17:32,083 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:17:32,092 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:17:32,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:17:32,129 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:17:32,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:17:32,330 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:17:32,331 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2018-09-30 23:17:32,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 23:17:32,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 23:17:32,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-09-30 23:17:32,332 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 5 states. [2018-09-30 23:17:32,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:17:32,369 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2018-09-30 23:17:32,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 23:17:32,370 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2018-09-30 23:17:32,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:17:32,371 INFO L225 Difference]: With dead ends: 9 [2018-09-30 23:17:32,371 INFO L226 Difference]: Without dead ends: 7 [2018-09-30 23:17:32,373 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-09-30 23:17:32,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-30 23:17:32,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-30 23:17:32,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-30 23:17:32,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-30 23:17:32,376 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-09-30 23:17:32,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:17:32,377 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-30 23:17:32,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 23:17:32,377 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-30 23:17:32,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-30 23:17:32,377 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:17:32,378 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2018-09-30 23:17:32,378 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:17:32,378 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:17:32,378 INFO L82 PathProgramCache]: Analyzing trace with hash 892275272, now seen corresponding path program 2 times [2018-09-30 23:17:32,379 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:17:32,379 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:17:32,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:17:32,380 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:17:32,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:17:32,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:17:32,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:17:32,547 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:17:32,547 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:17:32,556 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:17:32,566 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:17:32,567 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:17:32,569 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:17:32,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:17:32,670 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:17:32,671 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-09-30 23:17:32,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 23:17:32,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 23:17:32,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:17:32,672 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 7 states. [2018-09-30 23:17:33,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:17:33,078 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-09-30 23:17:33,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 23:17:33,079 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 6 [2018-09-30 23:17:33,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:17:33,080 INFO L225 Difference]: With dead ends: 11 [2018-09-30 23:17:33,080 INFO L226 Difference]: Without dead ends: 9 [2018-09-30 23:17:33,081 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:17:33,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-30 23:17:33,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-30 23:17:33,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-30 23:17:33,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-30 23:17:33,085 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-09-30 23:17:33,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:17:33,085 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-30 23:17:33,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 23:17:33,085 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-30 23:17:33,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 23:17:33,086 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:17:33,086 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1] [2018-09-30 23:17:33,087 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:17:33,087 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:17:33,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1516986008, now seen corresponding path program 3 times [2018-09-30 23:17:33,088 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:17:33,088 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:17:33,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:17:33,090 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:17:33,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:17:33,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:17:33,217 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:17:33,218 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:17:33,218 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:17:33,229 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:17:33,244 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-30 23:17:33,244 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:17:33,246 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:17:33,341 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:17:33,371 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:17:33,372 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-09-30 23:17:33,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:17:33,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:17:33,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:17:33,373 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 9 states. [2018-09-30 23:17:33,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:17:33,665 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2018-09-30 23:17:33,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:17:33,667 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 8 [2018-09-30 23:17:33,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:17:33,668 INFO L225 Difference]: With dead ends: 13 [2018-09-30 23:17:33,668 INFO L226 Difference]: Without dead ends: 11 [2018-09-30 23:17:33,668 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:17:33,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-30 23:17:33,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-30 23:17:33,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-30 23:17:33,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-30 23:17:33,673 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-09-30 23:17:33,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:17:33,673 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-30 23:17:33,673 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:17:33,674 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-30 23:17:33,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 23:17:33,674 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:17:33,674 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1] [2018-09-30 23:17:33,675 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:17:33,675 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:17:33,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1829703544, now seen corresponding path program 4 times [2018-09-30 23:17:33,675 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:17:33,676 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:17:33,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:17:33,678 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:17:33,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:17:33,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:17:34,176 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:17:34,177 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:17:34,178 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:17:34,186 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:17:34,202 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:17:34,202 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:17:34,204 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:17:34,302 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:17:34,324 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:17:34,325 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-09-30 23:17:34,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:17:34,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:17:34,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:17:34,326 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 11 states. [2018-09-30 23:17:34,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:17:34,580 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2018-09-30 23:17:34,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:17:34,581 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2018-09-30 23:17:34,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:17:34,582 INFO L225 Difference]: With dead ends: 15 [2018-09-30 23:17:34,582 INFO L226 Difference]: Without dead ends: 13 [2018-09-30 23:17:34,582 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2018-09-30 23:17:34,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-30 23:17:34,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-30 23:17:34,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-30 23:17:34,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-30 23:17:34,587 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-09-30 23:17:34,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:17:34,587 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-30 23:17:34,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:17:34,587 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-30 23:17:34,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-30 23:17:34,588 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:17:34,588 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1] [2018-09-30 23:17:34,588 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:17:34,588 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:17:34,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1703544920, now seen corresponding path program 5 times [2018-09-30 23:17:34,589 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:17:34,589 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:17:34,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:17:34,590 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:17:34,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:17:34,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:17:35,244 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:17:35,246 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:17:35,247 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:17:35,261 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:17:35,274 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-30 23:17:35,275 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:17:35,278 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:17:35,325 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:17:35,346 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:17:35,346 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-09-30 23:17:35,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 23:17:35,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 23:17:35,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2018-09-30 23:17:35,347 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 13 states. [2018-09-30 23:17:35,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:17:35,739 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2018-09-30 23:17:35,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 23:17:35,740 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2018-09-30 23:17:35,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:17:35,741 INFO L225 Difference]: With dead ends: 17 [2018-09-30 23:17:35,741 INFO L226 Difference]: Without dead ends: 15 [2018-09-30 23:17:35,742 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2018-09-30 23:17:35,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-30 23:17:35,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-30 23:17:35,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-30 23:17:35,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-30 23:17:35,747 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-09-30 23:17:35,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:17:35,747 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-30 23:17:35,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 23:17:35,747 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-30 23:17:35,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 23:17:35,748 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:17:35,748 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1, 1] [2018-09-30 23:17:35,749 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:17:35,749 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:17:35,749 INFO L82 PathProgramCache]: Analyzing trace with hash -724191544, now seen corresponding path program 6 times [2018-09-30 23:17:35,749 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:17:35,749 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:17:35,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:17:35,750 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:17:35,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:17:35,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:17:36,048 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:17:36,049 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:17:36,049 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:17:36,060 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:17:36,092 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 23:17:36,093 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:17:36,095 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:17:36,139 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:17:36,160 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:17:36,160 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-09-30 23:17:36,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 23:17:36,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 23:17:36,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2018-09-30 23:17:36,161 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 15 states. [2018-09-30 23:17:36,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:17:36,722 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2018-09-30 23:17:36,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 23:17:36,725 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 14 [2018-09-30 23:17:36,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:17:36,725 INFO L225 Difference]: With dead ends: 19 [2018-09-30 23:17:36,726 INFO L226 Difference]: Without dead ends: 17 [2018-09-30 23:17:36,726 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2018-09-30 23:17:36,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-30 23:17:36,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-30 23:17:36,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-30 23:17:36,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-30 23:17:36,731 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-09-30 23:17:36,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:17:36,731 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-30 23:17:36,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 23:17:36,732 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-30 23:17:36,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-30 23:17:36,732 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:17:36,732 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1, 1] [2018-09-30 23:17:36,732 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:17:36,733 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:17:36,733 INFO L82 PathProgramCache]: Analyzing trace with hash -163435032, now seen corresponding path program 7 times [2018-09-30 23:17:36,733 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:17:36,733 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:17:36,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:17:36,734 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:17:36,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:17:36,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:17:36,974 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:17:36,974 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:17:36,974 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:17:36,983 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:17:36,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:17:37,003 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:17:37,066 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:17:37,096 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:17:37,096 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2018-09-30 23:17:37,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 23:17:37,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 23:17:37,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2018-09-30 23:17:37,097 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 17 states. [2018-09-30 23:17:37,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:17:37,760 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-09-30 23:17:37,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 23:17:37,761 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 16 [2018-09-30 23:17:37,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:17:37,762 INFO L225 Difference]: With dead ends: 21 [2018-09-30 23:17:37,762 INFO L226 Difference]: Without dead ends: 19 [2018-09-30 23:17:37,763 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2018-09-30 23:17:37,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-30 23:17:37,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-30 23:17:37,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-30 23:17:37,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-30 23:17:37,768 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-09-30 23:17:37,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:17:37,769 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-30 23:17:37,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 23:17:37,769 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-30 23:17:37,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 23:17:37,770 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:17:37,770 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1, 1] [2018-09-30 23:17:37,770 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:17:37,770 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:17:37,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1852661000, now seen corresponding path program 8 times [2018-09-30 23:17:37,771 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:17:37,771 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:17:37,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:17:37,772 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:17:37,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:17:37,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:17:38,470 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:17:38,471 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:17:38,471 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:17:38,485 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:17:38,501 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:17:38,501 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:17:38,506 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:17:38,605 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:17:38,637 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:17:38,637 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2018-09-30 23:17:38,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 23:17:38,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 23:17:38,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2018-09-30 23:17:38,638 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 19 states. [2018-09-30 23:17:39,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:17:39,344 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2018-09-30 23:17:39,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 23:17:39,344 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 18 [2018-09-30 23:17:39,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:17:39,345 INFO L225 Difference]: With dead ends: 23 [2018-09-30 23:17:39,345 INFO L226 Difference]: Without dead ends: 21 [2018-09-30 23:17:39,346 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 23:17:39,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-30 23:17:39,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-30 23:17:39,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-30 23:17:39,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-30 23:17:39,351 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2018-09-30 23:17:39,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:17:39,352 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-30 23:17:39,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 23:17:39,352 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-30 23:17:39,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 23:17:39,353 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:17:39,353 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1, 1] [2018-09-30 23:17:39,353 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:17:39,353 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:17:39,354 INFO L82 PathProgramCache]: Analyzing trace with hash -2004270040, now seen corresponding path program 9 times [2018-09-30 23:17:39,354 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:17:39,354 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:17:39,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:17:39,355 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:17:39,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:17:39,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:17:39,710 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:17:39,711 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:17:39,711 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:17:39,722 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:17:39,735 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-09-30 23:17:39,736 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:17:39,738 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:17:39,866 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:17:39,887 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:17:39,888 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2018-09-30 23:17:39,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 23:17:39,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 23:17:39,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=380, Unknown=0, NotChecked=0, Total=420 [2018-09-30 23:17:39,889 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 21 states. [2018-09-30 23:17:40,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:17:40,811 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-09-30 23:17:40,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 23:17:40,811 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 20 [2018-09-30 23:17:40,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:17:40,813 INFO L225 Difference]: With dead ends: 25 [2018-09-30 23:17:40,813 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 23:17:40,814 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=379, Invalid=1027, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 23:17:40,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 23:17:40,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-30 23:17:40,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-30 23:17:40,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-30 23:17:40,819 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2018-09-30 23:17:40,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:17:40,819 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-30 23:17:40,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 23:17:40,819 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-30 23:17:40,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 23:17:40,820 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:17:40,820 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1, 1] [2018-09-30 23:17:40,820 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:17:40,821 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:17:40,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1958223032, now seen corresponding path program 10 times [2018-09-30 23:17:40,821 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:17:40,821 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:17:40,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:17:40,822 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:17:40,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:17:40,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:17:41,179 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:17:41,179 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:17:41,179 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:17:41,187 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:17:41,211 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:17:41,211 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:17:41,220 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:17:41,347 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:17:41,368 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:17:41,368 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2018-09-30 23:17:41,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 23:17:41,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 23:17:41,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=462, Unknown=0, NotChecked=0, Total=506 [2018-09-30 23:17:41,369 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 23 states. [2018-09-30 23:17:41,563 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 8 [2018-09-30 23:17:41,906 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 11 [2018-09-30 23:17:42,326 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 11 [2018-09-30 23:17:42,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:17:42,790 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2018-09-30 23:17:42,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 23:17:42,790 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 22 [2018-09-30 23:17:42,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:17:42,791 INFO L225 Difference]: With dead ends: 27 [2018-09-30 23:17:42,791 INFO L226 Difference]: Without dead ends: 25 [2018-09-30 23:17:42,792 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=461, Invalid=1261, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 23:17:42,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-30 23:17:42,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-30 23:17:42,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-30 23:17:42,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-30 23:17:42,797 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2018-09-30 23:17:42,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:17:42,798 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-30 23:17:42,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-30 23:17:42,798 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-30 23:17:42,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-30 23:17:42,799 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:17:42,799 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1, 1] [2018-09-30 23:17:42,799 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:17:42,799 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:17:42,799 INFO L82 PathProgramCache]: Analyzing trace with hash -656721304, now seen corresponding path program 11 times [2018-09-30 23:17:42,799 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:17:42,799 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:17:42,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:17:42,800 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:17:42,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:17:42,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:17:43,147 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:17:43,148 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:17:43,148 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:17:43,156 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:17:43,185 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-09-30 23:17:43,185 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:17:43,191 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:17:43,343 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:17:43,372 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:17:43,372 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2018-09-30 23:17:43,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-30 23:17:43,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-30 23:17:43,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=552, Unknown=0, NotChecked=0, Total=600 [2018-09-30 23:17:43,375 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 25 states. [2018-09-30 23:17:44,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:17:44,414 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2018-09-30 23:17:44,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 23:17:44,415 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 24 [2018-09-30 23:17:44,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:17:44,415 INFO L225 Difference]: With dead ends: 29 [2018-09-30 23:17:44,416 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 23:17:44,417 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=551, Invalid=1519, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 23:17:44,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 23:17:44,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-30 23:17:44,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-30 23:17:44,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-30 23:17:44,422 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2018-09-30 23:17:44,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:17:44,422 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-30 23:17:44,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-30 23:17:44,422 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-30 23:17:44,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-30 23:17:44,423 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:17:44,423 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1, 1] [2018-09-30 23:17:44,423 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:17:44,424 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:17:44,424 INFO L82 PathProgramCache]: Analyzing trace with hash 250956168, now seen corresponding path program 12 times [2018-09-30 23:17:44,424 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:17:44,424 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:17:44,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:17:44,425 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:17:44,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:17:44,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:17:44,854 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:17:44,854 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:17:44,854 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:17:44,867 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:17:45,019 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-30 23:17:45,020 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:17:45,022 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:17:45,148 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:17:45,178 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:17:45,178 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2018-09-30 23:17:45,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-30 23:17:45,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-30 23:17:45,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=650, Unknown=0, NotChecked=0, Total=702 [2018-09-30 23:17:45,179 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 27 states. [2018-09-30 23:17:46,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:17:46,422 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-09-30 23:17:46,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 23:17:46,423 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 26 [2018-09-30 23:17:46,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:17:46,424 INFO L225 Difference]: With dead ends: 31 [2018-09-30 23:17:46,424 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 23:17:46,425 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=649, Invalid=1801, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 23:17:46,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 23:17:46,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-30 23:17:46,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-30 23:17:46,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-30 23:17:46,430 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2018-09-30 23:17:46,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:17:46,430 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-30 23:17:46,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-30 23:17:46,430 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-30 23:17:46,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-30 23:17:46,431 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:17:46,431 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1, 1] [2018-09-30 23:17:46,431 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:17:46,432 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:17:46,432 INFO L82 PathProgramCache]: Analyzing trace with hash 650645672, now seen corresponding path program 13 times [2018-09-30 23:17:46,432 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:17:46,432 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:17:46,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:17:46,433 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:17:46,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:17:46,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:17:46,909 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:17:46,909 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:17:46,909 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:17:46,917 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:17:46,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:17:46,975 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:17:47,146 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:17:47,166 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:17:47,167 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2018-09-30 23:17:47,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 23:17:47,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 23:17:47,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=756, Unknown=0, NotChecked=0, Total=812 [2018-09-30 23:17:47,168 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 29 states. [2018-09-30 23:17:47,400 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 11 [2018-09-30 23:17:48,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:17:48,843 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2018-09-30 23:17:48,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 23:17:48,844 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 28 [2018-09-30 23:17:48,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:17:48,844 INFO L225 Difference]: With dead ends: 33 [2018-09-30 23:17:48,844 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 23:17:48,846 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=755, Invalid=2107, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 23:17:48,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 23:17:48,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-30 23:17:48,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-30 23:17:48,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-30 23:17:48,851 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2018-09-30 23:17:48,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:17:48,851 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-30 23:17:48,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 23:17:48,851 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-30 23:17:48,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-30 23:17:48,852 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:17:48,852 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1, 1] [2018-09-30 23:17:48,852 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:17:48,852 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:17:48,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1794797624, now seen corresponding path program 14 times [2018-09-30 23:17:48,853 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:17:48,853 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:17:48,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:17:48,853 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:17:48,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:17:48,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:17:49,596 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:17:49,596 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:17:49,596 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:17:49,604 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:17:49,660 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:17:49,660 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:17:49,681 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:17:49,756 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:17:49,777 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:17:49,778 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2018-09-30 23:17:49,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-30 23:17:49,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-30 23:17:49,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=870, Unknown=0, NotChecked=0, Total=930 [2018-09-30 23:17:49,779 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 31 states. [2018-09-30 23:17:50,887 WARN L178 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 11 [2018-09-30 23:17:51,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:17:51,719 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2018-09-30 23:17:51,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 23:17:51,719 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 30 [2018-09-30 23:17:51,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:17:51,720 INFO L225 Difference]: With dead ends: 35 [2018-09-30 23:17:51,721 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 23:17:51,723 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=869, Invalid=2437, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 23:17:51,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 23:17:51,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-30 23:17:51,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-30 23:17:51,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-30 23:17:51,728 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2018-09-30 23:17:51,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:17:51,728 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-30 23:17:51,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-30 23:17:51,729 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-30 23:17:51,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-30 23:17:51,729 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:17:51,729 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1, 1] [2018-09-30 23:17:51,730 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:17:51,730 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:17:51,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1776273128, now seen corresponding path program 15 times [2018-09-30 23:17:51,730 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:17:51,730 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:17:51,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:17:51,731 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:17:51,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:17:51,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:17:53,002 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:17:53,002 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:17:53,002 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:17:53,010 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:17:53,036 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-09-30 23:17:53,036 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:17:53,038 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:17:53,092 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:17:53,113 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:17:53,113 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2018-09-30 23:17:53,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-30 23:17:53,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-30 23:17:53,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=992, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 23:17:53,114 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 33 states. [2018-09-30 23:17:53,364 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 9 [2018-09-30 23:17:55,390 WARN L178 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 11 [2018-09-30 23:17:56,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:17:56,023 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-09-30 23:17:56,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 23:17:56,024 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 32 [2018-09-30 23:17:56,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:17:56,025 INFO L225 Difference]: With dead ends: 37 [2018-09-30 23:17:56,025 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 23:17:56,027 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=991, Invalid=2791, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 23:17:56,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 23:17:56,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-30 23:17:56,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-30 23:17:56,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-30 23:17:56,033 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2018-09-30 23:17:56,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:17:56,033 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-30 23:17:56,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-30 23:17:56,034 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-30 23:17:56,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-30 23:17:56,034 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:17:56,034 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1, 1] [2018-09-30 23:17:56,035 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:17:56,035 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:17:56,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1896396296, now seen corresponding path program 16 times [2018-09-30 23:17:56,035 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:17:56,035 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:17:56,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:17:56,036 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:17:56,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:17:56,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:17:56,613 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:17:56,614 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:17:56,614 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:17:56,622 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:17:56,682 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:17:56,682 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:17:56,710 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:17:56,782 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:17:56,803 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:17:56,803 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2018-09-30 23:17:56,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-30 23:17:56,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-30 23:17:56,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=1122, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 23:17:56,804 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 35 states. [2018-09-30 23:17:57,032 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 9 [2018-09-30 23:17:59,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:17:59,312 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2018-09-30 23:17:59,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 23:17:59,313 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 34 [2018-09-30 23:17:59,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:17:59,314 INFO L225 Difference]: With dead ends: 39 [2018-09-30 23:17:59,314 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 23:17:59,316 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1121, Invalid=3169, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 23:17:59,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 23:17:59,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-30 23:17:59,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-30 23:17:59,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-30 23:17:59,321 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2018-09-30 23:17:59,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:17:59,322 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-30 23:17:59,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-30 23:17:59,322 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-30 23:17:59,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-30 23:17:59,322 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:17:59,322 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1, 1] [2018-09-30 23:17:59,323 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:17:59,323 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:17:59,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1370643752, now seen corresponding path program 17 times [2018-09-30 23:17:59,323 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:17:59,323 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:17:59,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:17:59,324 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:17:59,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:17:59,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:18:00,075 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:18:00,075 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:18:00,075 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:18:00,084 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:18:00,147 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-30 23:18:00,147 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:18:00,159 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:18:00,231 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:18:00,251 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:18:00,251 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2018-09-30 23:18:00,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-30 23:18:00,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-30 23:18:00,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=1260, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 23:18:00,253 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 37 states. [2018-09-30 23:18:02,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:18:02,747 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2018-09-30 23:18:02,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 23:18:02,747 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 36 [2018-09-30 23:18:02,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:18:02,748 INFO L225 Difference]: With dead ends: 41 [2018-09-30 23:18:02,748 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 23:18:02,752 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1259, Invalid=3571, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 23:18:02,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 23:18:02,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-30 23:18:02,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-30 23:18:02,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-30 23:18:02,757 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2018-09-30 23:18:02,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:18:02,757 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-30 23:18:02,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-30 23:18:02,758 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-30 23:18:02,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-30 23:18:02,758 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:18:02,758 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1, 1] [2018-09-30 23:18:02,759 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:18:02,759 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:18:02,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1366377400, now seen corresponding path program 18 times [2018-09-30 23:18:02,759 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:18:02,759 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:18:02,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:18:02,760 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:18:02,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:18:02,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:18:04,247 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:18:04,248 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:18:04,248 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:18:04,255 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:18:04,281 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-30 23:18:04,281 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:18:04,284 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:18:04,439 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:18:04,460 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:18:04,461 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2018-09-30 23:18:04,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-30 23:18:04,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-30 23:18:04,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=1406, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 23:18:04,462 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 39 states. [2018-09-30 23:18:07,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:18:07,249 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2018-09-30 23:18:07,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 23:18:07,250 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 38 [2018-09-30 23:18:07,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:18:07,251 INFO L225 Difference]: With dead ends: 43 [2018-09-30 23:18:07,251 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 23:18:07,254 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1405, Invalid=3997, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 23:18:07,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 23:18:07,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-30 23:18:07,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-30 23:18:07,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-30 23:18:07,259 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2018-09-30 23:18:07,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:18:07,260 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-30 23:18:07,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-30 23:18:07,260 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-30 23:18:07,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-30 23:18:07,261 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:18:07,261 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1, 1] [2018-09-30 23:18:07,261 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:18:07,261 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:18:07,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1171247976, now seen corresponding path program 19 times [2018-09-30 23:18:07,262 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:18:07,262 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:18:07,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:18:07,262 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:18:07,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:18:07,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:18:08,507 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:18:08,508 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:18:08,508 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:18:08,516 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:18:08,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:18:08,657 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:18:08,747 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:18:08,767 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:18:08,767 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2018-09-30 23:18:08,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 23:18:08,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 23:18:08,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1560, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 23:18:08,769 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 41 states. [2018-09-30 23:18:11,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:18:11,939 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2018-09-30 23:18:11,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 23:18:11,939 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 40 [2018-09-30 23:18:11,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:18:11,940 INFO L225 Difference]: With dead ends: 45 [2018-09-30 23:18:11,940 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 23:18:11,942 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1559, Invalid=4447, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 23:18:11,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 23:18:11,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-30 23:18:11,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-30 23:18:11,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-30 23:18:11,948 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2018-09-30 23:18:11,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:18:11,948 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-30 23:18:11,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-30 23:18:11,948 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-30 23:18:11,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-30 23:18:11,949 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:18:11,949 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1, 1] [2018-09-30 23:18:11,949 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:18:11,949 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:18:11,950 INFO L82 PathProgramCache]: Analyzing trace with hash 287810184, now seen corresponding path program 20 times [2018-09-30 23:18:11,950 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:18:11,950 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:18:11,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:18:11,950 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:18:11,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:18:12,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:18:12,863 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:18:12,864 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:18:12,864 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:18:12,873 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:18:12,973 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:18:12,973 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:18:13,028 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:18:13,103 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:18:13,123 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:18:13,124 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2018-09-30 23:18:13,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-30 23:18:13,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-30 23:18:13,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1722, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 23:18:13,125 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 43 states. [2018-09-30 23:18:16,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:18:16,608 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2018-09-30 23:18:16,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 23:18:16,608 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 42 [2018-09-30 23:18:16,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:18:16,609 INFO L225 Difference]: With dead ends: 47 [2018-09-30 23:18:16,609 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 23:18:16,612 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1721, Invalid=4921, Unknown=0, NotChecked=0, Total=6642 [2018-09-30 23:18:16,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 23:18:16,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-30 23:18:16,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-30 23:18:16,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-30 23:18:16,618 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2018-09-30 23:18:16,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:18:16,619 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-30 23:18:16,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-30 23:18:16,619 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-30 23:18:16,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-30 23:18:16,619 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:18:16,620 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1, 1] [2018-09-30 23:18:16,620 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:18:16,620 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:18:16,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1707616680, now seen corresponding path program 21 times [2018-09-30 23:18:16,620 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:18:16,620 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:18:16,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:18:16,621 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:18:16,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:18:16,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:18:17,653 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:18:17,654 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:18:17,654 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:18:17,661 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:18:17,694 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-09-30 23:18:17,695 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:18:17,697 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:18:17,768 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:18:17,791 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:18:17,791 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2018-09-30 23:18:17,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-30 23:18:17,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-30 23:18:17,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1892, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 23:18:17,792 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 45 states. [2018-09-30 23:18:21,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:18:21,778 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-09-30 23:18:21,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-30 23:18:21,781 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 44 [2018-09-30 23:18:21,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:18:21,781 INFO L225 Difference]: With dead ends: 49 [2018-09-30 23:18:21,781 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 23:18:21,783 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1891, Invalid=5419, Unknown=0, NotChecked=0, Total=7310 [2018-09-30 23:18:21,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 23:18:21,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-30 23:18:21,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-30 23:18:21,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-30 23:18:21,788 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2018-09-30 23:18:21,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:18:21,788 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-30 23:18:21,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-30 23:18:21,789 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-30 23:18:21,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-30 23:18:21,789 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:18:21,789 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1, 1] [2018-09-30 23:18:21,790 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:18:21,790 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:18:21,790 INFO L82 PathProgramCache]: Analyzing trace with hash 342059208, now seen corresponding path program 22 times [2018-09-30 23:18:21,790 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:18:21,790 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:18:21,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:18:21,791 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:18:21,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:18:21,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:18:22,946 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:18:22,947 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:18:22,947 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:18:22,955 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:18:23,086 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:18:23,086 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:18:23,160 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:18:23,241 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:18:23,262 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:18:23,262 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2018-09-30 23:18:23,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-30 23:18:23,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-30 23:18:23,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=2070, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 23:18:23,263 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 47 states. [2018-09-30 23:18:27,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:18:27,686 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2018-09-30 23:18:27,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 23:18:27,686 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 46 [2018-09-30 23:18:27,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:18:27,687 INFO L225 Difference]: With dead ends: 51 [2018-09-30 23:18:27,687 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 23:18:27,688 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=2069, Invalid=5941, Unknown=0, NotChecked=0, Total=8010 [2018-09-30 23:18:27,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 23:18:27,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-30 23:18:27,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-30 23:18:27,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-30 23:18:27,693 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2018-09-30 23:18:27,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:18:27,693 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-30 23:18:27,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-30 23:18:27,694 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-30 23:18:27,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-30 23:18:27,694 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:18:27,694 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1, 1] [2018-09-30 23:18:27,694 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:18:27,694 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:18:27,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1993646104, now seen corresponding path program 23 times [2018-09-30 23:18:27,695 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:18:27,695 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:18:27,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:18:27,696 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:18:27,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:18:27,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:18:29,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:18:29,126 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:18:29,126 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:18:29,133 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:18:29,257 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-09-30 23:18:29,257 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:18:29,277 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:18:29,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:18:29,384 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:18:29,384 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2018-09-30 23:18:29,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-30 23:18:29,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-30 23:18:29,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=2256, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 23:18:29,385 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 49 states. [2018-09-30 23:18:29,683 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 9 [2018-09-30 23:18:29,816 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 11 [2018-09-30 23:18:34,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:18:34,207 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2018-09-30 23:18:34,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 23:18:34,208 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 48 [2018-09-30 23:18:34,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:18:34,209 INFO L225 Difference]: With dead ends: 53 [2018-09-30 23:18:34,209 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 23:18:34,210 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=2255, Invalid=6487, Unknown=0, NotChecked=0, Total=8742 [2018-09-30 23:18:34,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 23:18:34,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-30 23:18:34,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-30 23:18:34,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-30 23:18:34,215 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2018-09-30 23:18:34,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:18:34,215 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-30 23:18:34,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-30 23:18:34,216 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-30 23:18:34,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-30 23:18:34,216 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:18:34,216 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1, 1] [2018-09-30 23:18:34,216 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:18:34,217 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:18:34,217 INFO L82 PathProgramCache]: Analyzing trace with hash -338555128, now seen corresponding path program 24 times [2018-09-30 23:18:34,217 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:18:34,217 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:18:34,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:18:34,218 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:18:34,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:18:34,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:18:35,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:18:35,749 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:18:35,750 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:18:35,757 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:18:35,788 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-30 23:18:35,789 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:18:35,791 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:18:36,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:18:36,327 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:18:36,327 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2018-09-30 23:18:36,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-30 23:18:36,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-30 23:18:36,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=2450, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 23:18:36,328 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 51 states. [2018-09-30 23:18:36,674 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-30 23:18:41,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:18:41,680 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2018-09-30 23:18:41,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 23:18:41,680 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 50 [2018-09-30 23:18:41,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:18:41,681 INFO L225 Difference]: With dead ends: 55 [2018-09-30 23:18:41,681 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 23:18:41,683 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=2449, Invalid=7057, Unknown=0, NotChecked=0, Total=9506 [2018-09-30 23:18:41,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 23:18:41,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-30 23:18:41,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-30 23:18:41,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-30 23:18:41,689 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2018-09-30 23:18:41,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:18:41,689 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-30 23:18:41,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-30 23:18:41,689 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-30 23:18:41,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-30 23:18:41,690 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:18:41,690 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1, 1] [2018-09-30 23:18:41,690 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:18:41,690 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:18:41,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1065973288, now seen corresponding path program 25 times [2018-09-30 23:18:41,691 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:18:41,691 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:18:41,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:18:41,691 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:18:41,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:18:41,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:18:43,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:18:43,355 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:18:43,355 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:18:43,365 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:18:43,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:18:43,650 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:18:43,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:18:43,760 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:18:43,760 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2018-09-30 23:18:43,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-30 23:18:43,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-30 23:18:43,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=2652, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 23:18:43,762 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 53 states. [2018-09-30 23:18:44,000 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 9 [2018-09-30 23:18:44,121 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 23:18:44,248 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 23:18:44,378 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-30 23:18:44,771 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 11 [2018-09-30 23:18:44,923 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 11 [2018-09-30 23:18:49,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:18:49,671 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2018-09-30 23:18:49,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-30 23:18:49,671 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 52 [2018-09-30 23:18:49,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:18:49,672 INFO L225 Difference]: With dead ends: 57 [2018-09-30 23:18:49,672 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 23:18:49,674 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=2651, Invalid=7651, Unknown=0, NotChecked=0, Total=10302 [2018-09-30 23:18:49,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 23:18:49,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-30 23:18:49,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-30 23:18:49,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-30 23:18:49,680 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2018-09-30 23:18:49,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:18:49,680 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-30 23:18:49,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-30 23:18:49,681 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-30 23:18:49,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-30 23:18:49,681 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:18:49,681 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1, 1] [2018-09-30 23:18:49,682 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:18:49,682 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:18:49,682 INFO L82 PathProgramCache]: Analyzing trace with hash -2096917176, now seen corresponding path program 26 times [2018-09-30 23:18:49,682 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:18:49,682 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:18:49,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:18:49,683 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:18:49,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:18:49,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:18:51,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:18:51,374 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:18:51,374 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:18:51,381 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:18:51,583 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:18:51,583 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:18:51,702 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:18:51,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:18:51,839 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:18:51,839 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2018-09-30 23:18:51,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-30 23:18:51,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-30 23:18:51,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=2862, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 23:18:51,840 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 55 states. [2018-09-30 23:18:51,969 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 8 [2018-09-30 23:18:52,095 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 9 [2018-09-30 23:18:52,224 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 23:18:52,355 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 23:18:52,495 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 23:18:52,630 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 23:18:53,035 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 11 [2018-09-30 23:18:58,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:18:58,518 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2018-09-30 23:18:58,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 23:18:58,519 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 54 [2018-09-30 23:18:58,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:18:58,519 INFO L225 Difference]: With dead ends: 59 [2018-09-30 23:18:58,519 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 23:18:58,520 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=2861, Invalid=8269, Unknown=0, NotChecked=0, Total=11130 [2018-09-30 23:18:58,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 23:18:58,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-30 23:18:58,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-30 23:18:58,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-09-30 23:18:58,525 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2018-09-30 23:18:58,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:18:58,526 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-09-30 23:18:58,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-30 23:18:58,526 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-09-30 23:18:58,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-30 23:18:58,527 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:18:58,527 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1, 1] [2018-09-30 23:18:58,527 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:18:58,527 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:18:58,527 INFO L82 PathProgramCache]: Analyzing trace with hash -797807512, now seen corresponding path program 27 times [2018-09-30 23:18:58,527 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:18:58,527 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:18:58,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:18:58,528 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:18:58,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:18:58,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:00,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:00,245 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:00,245 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:19:00,253 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:19:00,305 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-09-30 23:19:00,306 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:00,308 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:00,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:00,474 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:00,474 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 56 [2018-09-30 23:19:00,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-30 23:19:00,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-30 23:19:00,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=3080, Unknown=0, NotChecked=0, Total=3192 [2018-09-30 23:19:00,475 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 57 states. [2018-09-30 23:19:00,615 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 8 [2018-09-30 23:19:00,749 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 9 [2018-09-30 23:19:00,892 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 23:19:01,027 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 23:19:01,169 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 23:19:01,328 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 23:19:01,465 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 23:19:01,607 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 23:19:01,754 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-30 23:19:01,904 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-09-30 23:19:07,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:07,505 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-09-30 23:19:07,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-30 23:19:07,506 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 56 [2018-09-30 23:19:07,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:07,506 INFO L225 Difference]: With dead ends: 61 [2018-09-30 23:19:07,507 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 23:19:07,508 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1379 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=3079, Invalid=8911, Unknown=0, NotChecked=0, Total=11990 [2018-09-30 23:19:07,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 23:19:07,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-30 23:19:07,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-30 23:19:07,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-30 23:19:07,512 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2018-09-30 23:19:07,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:07,513 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-30 23:19:07,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-30 23:19:07,513 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-30 23:19:07,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-30 23:19:07,513 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:07,514 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1, 1] [2018-09-30 23:19:07,514 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:07,514 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:07,514 INFO L82 PathProgramCache]: Analyzing trace with hash 2106063752, now seen corresponding path program 28 times [2018-09-30 23:19:07,514 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:07,514 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:07,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:07,515 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:07,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:07,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:09,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:09,198 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:09,198 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:19:09,205 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:19:09,452 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:19:09,453 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:09,600 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:09,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:09,696 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:09,697 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 58 [2018-09-30 23:19:09,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-30 23:19:09,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-30 23:19:09,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=3306, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 23:19:09,698 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 59 states. [2018-09-30 23:19:09,849 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 8 [2018-09-30 23:19:09,988 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 9 [2018-09-30 23:19:10,157 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 23:19:10,315 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 23:19:10,488 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 23:19:10,653 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 23:19:10,807 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 23:19:10,954 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 23:19:11,108 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 23:19:11,264 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 23:19:17,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:17,550 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2018-09-30 23:19:17,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-30 23:19:17,550 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 58 [2018-09-30 23:19:17,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:17,551 INFO L225 Difference]: With dead ends: 63 [2018-09-30 23:19:17,551 INFO L226 Difference]: Without dead ends: 61 [2018-09-30 23:19:17,552 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1486 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=3305, Invalid=9577, Unknown=0, NotChecked=0, Total=12882 [2018-09-30 23:19:17,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-30 23:19:17,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-30 23:19:17,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-30 23:19:17,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-09-30 23:19:17,558 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2018-09-30 23:19:17,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:17,558 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-09-30 23:19:17,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-30 23:19:17,558 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-09-30 23:19:17,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-30 23:19:17,559 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:17,559 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1, 1] [2018-09-30 23:19:17,559 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:17,559 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:17,559 INFO L82 PathProgramCache]: Analyzing trace with hash 997606056, now seen corresponding path program 29 times [2018-09-30 23:19:17,559 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:17,559 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:17,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:17,560 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:17,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:17,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:19,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:19,416 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:19,416 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:19:19,423 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:19:19,654 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-09-30 23:19:19,654 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:19,691 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:19,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:19,809 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:19,809 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 60 [2018-09-30 23:19:19,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-30 23:19:19,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-30 23:19:19,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=3540, Unknown=0, NotChecked=0, Total=3660 [2018-09-30 23:19:19,810 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 61 states. [2018-09-30 23:19:19,965 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 8 [2018-09-30 23:19:20,109 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 9 [2018-09-30 23:19:20,261 WARN L178 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 23:19:20,417 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 23:19:20,586 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 23:19:20,757 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 23:19:20,929 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 23:19:21,081 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 23:19:21,247 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 23:19:21,412 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 23:19:21,575 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 23:19:21,739 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 23:19:28,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:28,430 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2018-09-30 23:19:28,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-30 23:19:28,430 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 60 [2018-09-30 23:19:28,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:28,431 INFO L225 Difference]: With dead ends: 65 [2018-09-30 23:19:28,431 INFO L226 Difference]: Without dead ends: 63 [2018-09-30 23:19:28,432 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1597 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=3539, Invalid=10267, Unknown=0, NotChecked=0, Total=13806 [2018-09-30 23:19:28,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-30 23:19:28,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-30 23:19:28,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-30 23:19:28,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-30 23:19:28,438 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2018-09-30 23:19:28,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:28,438 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-30 23:19:28,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-30 23:19:28,438 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-30 23:19:28,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-30 23:19:28,439 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:28,439 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1, 1] [2018-09-30 23:19:28,439 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:28,439 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:28,439 INFO L82 PathProgramCache]: Analyzing trace with hash 921649608, now seen corresponding path program 30 times [2018-09-30 23:19:28,439 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:28,440 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:28,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:28,440 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:28,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:28,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:30,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:30,339 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:30,339 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:19:30,348 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:19:30,392 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-30 23:19:30,393 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:30,395 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:30,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:30,541 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:30,542 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 62 [2018-09-30 23:19:30,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-30 23:19:30,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-30 23:19:30,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=3782, Unknown=0, NotChecked=0, Total=3906 [2018-09-30 23:19:30,543 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 63 states. [2018-09-30 23:19:30,711 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 8 [2018-09-30 23:19:30,866 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 9 [2018-09-30 23:19:31,049 WARN L178 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 23:19:31,222 WARN L178 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 23:19:31,388 WARN L178 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 23:19:31,545 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 23:19:31,709 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 23:19:31,878 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 23:19:32,044 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 23:19:32,213 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 23:19:32,385 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 23:19:32,555 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 23:19:32,724 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 23:19:32,898 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 23:19:33,079 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-30 23:19:39,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:39,652 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2018-09-30 23:19:39,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-30 23:19:39,653 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 62 [2018-09-30 23:19:39,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:39,654 INFO L225 Difference]: With dead ends: 67 [2018-09-30 23:19:39,654 INFO L226 Difference]: Without dead ends: 65 [2018-09-30 23:19:39,655 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1712 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=3781, Invalid=10981, Unknown=0, NotChecked=0, Total=14762 [2018-09-30 23:19:39,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-30 23:19:39,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-30 23:19:39,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-30 23:19:39,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-09-30 23:19:39,659 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2018-09-30 23:19:39,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:39,659 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-09-30 23:19:39,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-30 23:19:39,660 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-09-30 23:19:39,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-30 23:19:39,660 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:39,660 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1, 1] [2018-09-30 23:19:39,660 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:39,660 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:39,661 INFO L82 PathProgramCache]: Analyzing trace with hash 941947112, now seen corresponding path program 31 times [2018-09-30 23:19:39,661 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:39,661 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:39,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:39,662 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:39,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:39,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:41,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:41,856 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:41,856 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:19:41,865 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:19:42,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:42,389 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:42,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:42,507 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:42,507 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 64 [2018-09-30 23:19:42,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-30 23:19:42,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-30 23:19:42,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=4032, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 23:19:42,508 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 65 states. [2018-09-30 23:19:42,681 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 8 [2018-09-30 23:19:42,845 WARN L178 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 9 [2018-09-30 23:19:43,016 WARN L178 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-30 23:19:43,190 WARN L178 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-30 23:19:43,364 WARN L178 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 23:19:43,525 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 23:19:43,697 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 23:19:43,872 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 23:19:44,043 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 23:19:44,231 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 23:19:44,401 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 23:19:44,577 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 23:19:44,747 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 23:19:45,102 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 23:19:52,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:52,518 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2018-09-30 23:19:52,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 23:19:52,519 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 64 [2018-09-30 23:19:52,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:52,519 INFO L225 Difference]: With dead ends: 69 [2018-09-30 23:19:52,520 INFO L226 Difference]: Without dead ends: 67 [2018-09-30 23:19:52,521 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1831 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=4031, Invalid=11719, Unknown=0, NotChecked=0, Total=15750 [2018-09-30 23:19:52,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-30 23:19:52,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-30 23:19:52,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-30 23:19:52,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-09-30 23:19:52,525 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2018-09-30 23:19:52,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:52,526 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-09-30 23:19:52,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-30 23:19:52,526 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-09-30 23:19:52,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-30 23:19:52,526 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:52,526 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1, 1] [2018-09-30 23:19:52,527 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:52,527 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:52,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1026988024, now seen corresponding path program 32 times [2018-09-30 23:19:52,527 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:52,527 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:52,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:52,528 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:19:52,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:52,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:54,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:54,650 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:54,650 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:19:54,659 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:19:55,018 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:19:55,019 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:55,243 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:55,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:55,406 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:55,406 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 66 [2018-09-30 23:19:55,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-30 23:19:55,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-30 23:19:55,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=4290, Unknown=0, NotChecked=0, Total=4422 [2018-09-30 23:19:55,407 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 67 states. [2018-09-30 23:19:55,609 WARN L178 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 8 [2018-09-30 23:19:55,780 WARN L178 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 9 [2018-09-30 23:19:55,952 WARN L178 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-30 23:19:56,128 WARN L178 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-30 23:19:56,302 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-30 23:19:56,490 WARN L178 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-30 23:19:56,680 WARN L178 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 23:19:56,862 WARN L178 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 23:19:57,049 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 23:19:57,241 WARN L178 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 23:19:57,432 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 23:19:57,631 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 23:19:57,826 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 23:19:58,014 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 23:19:58,215 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 23:19:58,423 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 23:19:58,620 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 23:19:58,827 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 23:19:59,029 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-30 23:20:00,458 WARN L178 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 11 [2018-09-30 23:20:06,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:06,177 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2018-09-30 23:20:06,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-30 23:20:06,178 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 66 [2018-09-30 23:20:06,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:06,179 INFO L225 Difference]: With dead ends: 71 [2018-09-30 23:20:06,179 INFO L226 Difference]: Without dead ends: 69 [2018-09-30 23:20:06,180 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1954 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=4289, Invalid=12481, Unknown=0, NotChecked=0, Total=16770 [2018-09-30 23:20:06,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-30 23:20:06,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-30 23:20:06,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-30 23:20:06,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-09-30 23:20:06,186 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2018-09-30 23:20:06,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:06,186 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-09-30 23:20:06,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-30 23:20:06,186 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-09-30 23:20:06,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-30 23:20:06,187 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:06,187 INFO L375 BasicCegarLoop]: trace histogram [65, 1, 1, 1] [2018-09-30 23:20:06,187 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:06,187 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:06,188 INFO L82 PathProgramCache]: Analyzing trace with hash 906923816, now seen corresponding path program 33 times [2018-09-30 23:20:06,188 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:06,188 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:06,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:06,188 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:06,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:06,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:08,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:08,830 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:08,830 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:20:08,838 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:20:08,883 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-09-30 23:20:08,883 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:08,885 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:08,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:09,011 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:09,011 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 68 [2018-09-30 23:20:09,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-30 23:20:09,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-30 23:20:09,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=4556, Unknown=0, NotChecked=0, Total=4692 [2018-09-30 23:20:09,012 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 69 states. [2018-09-30 23:20:09,204 WARN L178 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 8 [2018-09-30 23:20:09,384 WARN L178 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 9 [2018-09-30 23:20:09,573 WARN L178 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-30 23:20:09,759 WARN L178 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-30 23:20:09,952 WARN L178 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-30 23:20:10,144 WARN L178 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-30 23:20:10,334 WARN L178 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-30 23:20:10,520 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-30 23:20:10,720 WARN L178 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 23:20:10,918 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 23:20:11,115 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 23:20:11,318 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 23:20:11,513 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 23:20:11,704 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 23:20:11,932 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 23:20:12,149 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 23:20:12,353 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 23:20:12,578 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 23:20:12,796 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 23:20:12,998 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 23:20:20,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:20,587 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-09-30 23:20:20,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-30 23:20:20,588 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 68 [2018-09-30 23:20:20,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:20,589 INFO L225 Difference]: With dead ends: 73 [2018-09-30 23:20:20,589 INFO L226 Difference]: Without dead ends: 71 [2018-09-30 23:20:20,590 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2081 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=4555, Invalid=13267, Unknown=0, NotChecked=0, Total=17822 [2018-09-30 23:20:20,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-30 23:20:20,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-30 23:20:20,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-30 23:20:20,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-09-30 23:20:20,596 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2018-09-30 23:20:20,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:20,596 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-09-30 23:20:20,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-30 23:20:20,596 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-09-30 23:20:20,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-30 23:20:20,596 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:20,597 INFO L375 BasicCegarLoop]: trace histogram [67, 1, 1, 1] [2018-09-30 23:20:20,597 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:20,597 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:20,597 INFO L82 PathProgramCache]: Analyzing trace with hash -324637112, now seen corresponding path program 34 times [2018-09-30 23:20:20,597 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:20,597 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:20,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:20,598 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:20,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:20,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:23,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:23,468 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:23,468 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:20:23,476 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:20:23,906 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:20:23,906 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:24,168 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:24,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:24,301 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:24,301 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 70 [2018-09-30 23:20:24,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-30 23:20:24,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-30 23:20:24,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=4830, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 23:20:24,302 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 71 states. [2018-09-30 23:20:24,494 WARN L178 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 8 [2018-09-30 23:20:24,692 WARN L178 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 9 [2018-09-30 23:20:24,888 WARN L178 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-09-30 23:20:25,089 WARN L178 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-09-30 23:20:25,292 WARN L178 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-30 23:20:25,493 WARN L178 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-30 23:20:25,694 WARN L178 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-30 23:20:25,904 WARN L178 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-30 23:20:26,117 WARN L178 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-30 23:20:26,331 WARN L178 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-30 23:20:26,551 WARN L178 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 23:20:26,761 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 23:20:26,976 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 23:20:27,188 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 23:20:27,433 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 23:20:27,659 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 23:20:27,879 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 23:20:28,104 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 23:20:28,325 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 23:20:28,548 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 23:20:28,782 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 23:20:28,996 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 23:20:29,850 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 11 [2018-09-30 23:20:36,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:36,967 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2018-09-30 23:20:36,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-30 23:20:36,967 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 70 [2018-09-30 23:20:36,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:36,968 INFO L225 Difference]: With dead ends: 75 [2018-09-30 23:20:36,969 INFO L226 Difference]: Without dead ends: 73 [2018-09-30 23:20:36,969 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2212 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=4829, Invalid=14077, Unknown=0, NotChecked=0, Total=18906 [2018-09-30 23:20:36,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-30 23:20:36,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-30 23:20:36,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-30 23:20:36,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-09-30 23:20:36,975 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2018-09-30 23:20:36,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:36,976 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-09-30 23:20:36,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-30 23:20:36,976 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-09-30 23:20:36,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-30 23:20:36,976 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:36,977 INFO L375 BasicCegarLoop]: trace histogram [69, 1, 1, 1] [2018-09-30 23:20:36,977 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:36,977 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:36,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1556284776, now seen corresponding path program 35 times [2018-09-30 23:20:36,977 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:36,977 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:36,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:36,978 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:36,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:37,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:39,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:39,879 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:39,879 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:20:39,889 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:20:40,278 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-09-30 23:20:40,279 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:40,339 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:40,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:40,612 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:40,612 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 72 [2018-09-30 23:20:40,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-30 23:20:40,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-30 23:20:40,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=5112, Unknown=0, NotChecked=0, Total=5256 [2018-09-30 23:20:40,613 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 73 states. [2018-09-30 23:20:40,812 WARN L178 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 8 [2018-09-30 23:20:41,011 WARN L178 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 9 [2018-09-30 23:20:41,218 WARN L178 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-09-30 23:20:41,424 WARN L178 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-09-30 23:20:41,632 WARN L178 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-09-30 23:20:41,836 WARN L178 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-09-30 23:20:42,042 WARN L178 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-30 23:20:42,249 WARN L178 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-30 23:20:42,468 WARN L178 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-30 23:20:42,716 WARN L178 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-30 23:20:42,948 WARN L178 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-30 23:20:43,175 WARN L178 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-30 23:20:43,397 WARN L178 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 23:20:43,620 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 23:20:43,860 WARN L178 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 23:20:44,092 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 23:20:44,326 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 23:20:44,559 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 23:20:44,792 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 23:20:45,026 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 23:20:45,274 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 23:20:45,504 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 23:20:45,740 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 23:20:45,970 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 23:20:46,193 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-30 23:20:47,862 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 11 [2018-09-30 23:20:54,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:54,354 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2018-09-30 23:20:54,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-30 23:20:54,354 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 72 [2018-09-30 23:20:54,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:54,355 INFO L225 Difference]: With dead ends: 77 [2018-09-30 23:20:54,355 INFO L226 Difference]: Without dead ends: 75 [2018-09-30 23:20:54,356 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2347 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=5111, Invalid=14911, Unknown=0, NotChecked=0, Total=20022 [2018-09-30 23:20:54,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-30 23:20:54,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-30 23:20:54,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-30 23:20:54,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-09-30 23:20:54,362 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2018-09-30 23:20:54,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:54,363 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-09-30 23:20:54,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-30 23:20:54,363 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-09-30 23:20:54,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-30 23:20:54,363 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:54,363 INFO L375 BasicCegarLoop]: trace histogram [71, 1, 1, 1] [2018-09-30 23:20:54,364 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:54,364 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:54,364 INFO L82 PathProgramCache]: Analyzing trace with hash 940987528, now seen corresponding path program 36 times [2018-09-30 23:20:54,364 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:54,364 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:54,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:54,365 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:54,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:54,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:57,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:57,698 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:57,698 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:20:57,711 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:20:57,764 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-30 23:20:57,764 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:57,767 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:58,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:58,101 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:58,101 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 74 [2018-09-30 23:20:58,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-30 23:20:58,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-30 23:20:58,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=5402, Unknown=0, NotChecked=0, Total=5550 [2018-09-30 23:20:58,102 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 75 states. [2018-09-30 23:20:58,391 WARN L178 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 8 [2018-09-30 23:20:58,599 WARN L178 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 9 [2018-09-30 23:20:58,818 WARN L178 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-09-30 23:20:59,045 WARN L178 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-09-30 23:20:59,259 WARN L178 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-09-30 23:20:59,484 WARN L178 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-09-30 23:20:59,705 WARN L178 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-09-30 23:20:59,923 WARN L178 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-09-30 23:21:00,151 WARN L178 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-30 23:21:00,383 WARN L178 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-30 23:21:00,613 WARN L178 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-30 23:21:00,837 WARN L178 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-30 23:21:01,066 WARN L178 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-30 23:21:01,272 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-30 23:21:01,516 WARN L178 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 23:21:01,767 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 23:21:02,012 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 23:21:02,271 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 23:21:02,520 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 23:21:02,775 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 23:21:03,044 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 23:21:03,309 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 23:21:03,567 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 23:21:03,822 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 23:21:04,082 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 23:21:04,314 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 23:21:13,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:13,122 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2018-09-30 23:21:13,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-30 23:21:13,123 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 74 [2018-09-30 23:21:13,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:13,124 INFO L225 Difference]: With dead ends: 79 [2018-09-30 23:21:13,124 INFO L226 Difference]: Without dead ends: 77 [2018-09-30 23:21:13,125 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2486 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=5401, Invalid=15769, Unknown=0, NotChecked=0, Total=21170 [2018-09-30 23:21:13,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-30 23:21:13,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-30 23:21:13,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-30 23:21:13,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-09-30 23:21:13,131 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2018-09-30 23:21:13,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:13,132 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-09-30 23:21:13,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-30 23:21:13,132 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-09-30 23:21:13,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-30 23:21:13,132 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:13,133 INFO L375 BasicCegarLoop]: trace histogram [73, 1, 1, 1] [2018-09-30 23:21:13,133 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:13,133 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:13,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1949148248, now seen corresponding path program 37 times [2018-09-30 23:21:13,133 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:13,133 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:13,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:13,136 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:13,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:13,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:16,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:16,100 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:16,100 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:16,115 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:21:16,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:16,998 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:17,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:17,151 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:17,151 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 76 [2018-09-30 23:21:17,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-30 23:21:17,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-30 23:21:17,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=5700, Unknown=0, NotChecked=0, Total=5852 [2018-09-30 23:21:17,152 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 77 states. [2018-09-30 23:21:17,375 WARN L178 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 8 [2018-09-30 23:21:17,581 WARN L178 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 9 [2018-09-30 23:21:17,804 WARN L178 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-09-30 23:21:18,015 WARN L178 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-09-30 23:21:18,237 WARN L178 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-09-30 23:21:18,473 WARN L178 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-09-30 23:21:18,733 WARN L178 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-09-30 23:21:18,956 WARN L178 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-09-30 23:21:19,192 WARN L178 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-09-30 23:21:19,430 WARN L178 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-09-30 23:21:19,659 WARN L178 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-30 23:21:19,901 WARN L178 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-30 23:21:20,140 WARN L178 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-30 23:21:20,367 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-30 23:21:20,620 WARN L178 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-30 23:21:20,878 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-30 23:21:21,122 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 23:21:21,383 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 23:21:21,637 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 23:21:21,909 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 23:21:22,168 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 23:21:22,416 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 23:21:22,669 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 23:21:22,924 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 23:21:23,190 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 23:21:23,478 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 23:21:23,763 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 23:21:32,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:32,839 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2018-09-30 23:21:32,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-30 23:21:32,840 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 76 [2018-09-30 23:21:32,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:32,840 INFO L225 Difference]: With dead ends: 81 [2018-09-30 23:21:32,840 INFO L226 Difference]: Without dead ends: 79 [2018-09-30 23:21:32,841 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2629 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=5699, Invalid=16651, Unknown=0, NotChecked=0, Total=22350 [2018-09-30 23:21:32,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-30 23:21:32,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-30 23:21:32,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-30 23:21:32,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-09-30 23:21:32,848 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2018-09-30 23:21:32,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:32,849 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-09-30 23:21:32,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-30 23:21:32,849 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-09-30 23:21:32,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-30 23:21:32,850 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:32,850 INFO L375 BasicCegarLoop]: trace histogram [75, 1, 1, 1] [2018-09-30 23:21:32,850 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:32,850 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:32,850 INFO L82 PathProgramCache]: Analyzing trace with hash -525788472, now seen corresponding path program 38 times [2018-09-30 23:21:32,850 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:32,851 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:32,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:32,851 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:21:32,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:33,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:36,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:36,406 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:36,406 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:36,415 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:21:37,002 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:21:37,002 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:37,376 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:37,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:37,514 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:37,514 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 78 [2018-09-30 23:21:37,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-30 23:21:37,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-30 23:21:37,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=6006, Unknown=0, NotChecked=0, Total=6162 [2018-09-30 23:21:37,515 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 79 states. [2018-09-30 23:21:37,778 WARN L178 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 8 [2018-09-30 23:21:38,004 WARN L178 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 9 [2018-09-30 23:21:38,227 WARN L178 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-09-30 23:21:38,469 WARN L178 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-09-30 23:21:38,703 WARN L178 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-09-30 23:21:38,972 WARN L178 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-09-30 23:21:39,216 WARN L178 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-09-30 23:21:39,452 WARN L178 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-09-30 23:21:39,704 WARN L178 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-09-30 23:21:39,962 WARN L178 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-09-30 23:21:40,207 WARN L178 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-09-30 23:21:40,454 WARN L178 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-09-30 23:21:40,684 WARN L178 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-30 23:21:40,918 WARN L178 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-30 23:21:41,177 WARN L178 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-30 23:21:41,433 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-30 23:21:41,700 WARN L178 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-30 23:21:41,964 WARN L178 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-30 23:21:42,221 WARN L178 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 23:21:42,495 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 23:21:42,755 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 23:21:43,030 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 23:21:43,305 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 23:21:43,579 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 23:21:43,860 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 23:21:44,154 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 23:21:44,446 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 23:21:44,716 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 23:21:44,986 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 23:21:46,323 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 11 [2018-09-30 23:21:54,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:54,616 INFO L93 Difference]: Finished difference Result 83 states and 84 transitions. [2018-09-30 23:21:54,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-30 23:21:54,616 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 78 [2018-09-30 23:21:54,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:54,617 INFO L225 Difference]: With dead ends: 83 [2018-09-30 23:21:54,617 INFO L226 Difference]: Without dead ends: 81 [2018-09-30 23:21:54,618 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2776 ImplicationChecksByTransitivity, 20.0s TimeCoverageRelationStatistics Valid=6005, Invalid=17557, Unknown=0, NotChecked=0, Total=23562 [2018-09-30 23:21:54,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-30 23:21:54,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-30 23:21:54,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-30 23:21:54,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-09-30 23:21:54,623 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2018-09-30 23:21:54,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:54,623 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-09-30 23:21:54,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-30 23:21:54,624 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-09-30 23:21:54,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-30 23:21:54,624 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:54,624 INFO L375 BasicCegarLoop]: trace histogram [77, 1, 1, 1] [2018-09-30 23:21:54,624 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:54,624 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:54,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1523356136, now seen corresponding path program 39 times [2018-09-30 23:21:54,625 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:54,625 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:54,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:54,625 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:54,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:55,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:58,118 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:58,118 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:58,118 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:58,126 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:21:58,183 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-09-30 23:21:58,183 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:58,187 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:58,412 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:58,433 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:58,433 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 80 [2018-09-30 23:21:58,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-30 23:21:58,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-30 23:21:58,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=6320, Unknown=0, NotChecked=0, Total=6480 [2018-09-30 23:21:58,434 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 81 states. [2018-09-30 23:21:58,678 WARN L178 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 8 [2018-09-30 23:21:58,914 WARN L178 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 9 [2018-09-30 23:21:59,161 WARN L178 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2018-09-30 23:21:59,409 WARN L178 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2018-09-30 23:21:59,675 WARN L178 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-09-30 23:21:59,911 WARN L178 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-09-30 23:22:00,154 WARN L178 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-09-30 23:22:00,405 WARN L178 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-09-30 23:22:00,657 WARN L178 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-09-30 23:22:00,910 WARN L178 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-09-30 23:22:01,163 WARN L178 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-09-30 23:22:01,415 WARN L178 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-09-30 23:22:01,668 WARN L178 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-09-30 23:22:01,920 WARN L178 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-09-30 23:22:02,189 WARN L178 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-30 23:22:02,460 WARN L178 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-30 23:22:02,725 WARN L178 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-30 23:22:03,009 WARN L178 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-30 23:22:03,280 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-30 23:22:03,562 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-30 23:22:03,842 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 23:22:04,134 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 23:22:04,423 WARN L178 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 23:22:04,738 WARN L178 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 23:22:05,029 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 23:22:05,307 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 23:22:05,587 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 23:22:05,873 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 23:22:06,145 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 23:22:06,426 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 23:22:06,704 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 23:22:06,981 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 23:22:16,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:16,470 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2018-09-30 23:22:16,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-30 23:22:16,471 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 80 [2018-09-30 23:22:16,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:16,472 INFO L225 Difference]: With dead ends: 85 [2018-09-30 23:22:16,472 INFO L226 Difference]: Without dead ends: 83 [2018-09-30 23:22:16,473 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2927 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=6319, Invalid=18487, Unknown=0, NotChecked=0, Total=24806 [2018-09-30 23:22:16,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-30 23:22:16,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-30 23:22:16,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-30 23:22:16,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-09-30 23:22:16,478 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2018-09-30 23:22:16,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:16,478 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-09-30 23:22:16,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-30 23:22:16,478 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-09-30 23:22:16,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-30 23:22:16,478 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:16,479 INFO L375 BasicCegarLoop]: trace histogram [79, 1, 1, 1] [2018-09-30 23:22:16,479 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:16,479 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:16,479 INFO L82 PathProgramCache]: Analyzing trace with hash -638664440, now seen corresponding path program 40 times [2018-09-30 23:22:16,479 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:16,479 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:16,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:16,480 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:16,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:16,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:19,962 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:19,962 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:19,962 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:22:19,970 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:22:20,648 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:22:20,648 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:21,081 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:21,202 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:21,223 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:21,223 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 82 [2018-09-30 23:22:21,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-30 23:22:21,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-30 23:22:21,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=6642, Unknown=0, NotChecked=0, Total=6806 [2018-09-30 23:22:21,224 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 83 states. [2018-09-30 23:22:21,474 WARN L178 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 8 [2018-09-30 23:22:21,731 WARN L178 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 9 [2018-09-30 23:22:21,981 WARN L178 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2018-09-30 23:22:22,227 WARN L178 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2018-09-30 23:22:22,482 WARN L178 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2018-09-30 23:22:22,727 WARN L178 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2018-09-30 23:22:22,981 WARN L178 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-09-30 23:22:23,246 WARN L178 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-09-30 23:22:23,513 WARN L178 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-09-30 23:22:23,788 WARN L178 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-09-30 23:22:24,041 WARN L178 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-09-30 23:22:24,306 WARN L178 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-09-30 23:22:24,562 WARN L178 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-09-30 23:22:24,829 WARN L178 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-09-30 23:22:25,142 WARN L178 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-09-30 23:22:25,431 WARN L178 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-09-30 23:22:25,709 WARN L178 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-30 23:22:25,996 WARN L178 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-30 23:22:26,289 WARN L178 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-30 23:22:26,581 WARN L178 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-30 23:22:26,880 WARN L178 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-30 23:22:27,173 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-30 23:22:27,478 WARN L178 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 23:22:27,781 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 23:22:28,087 WARN L178 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 23:22:28,391 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 23:22:28,694 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 23:22:28,991 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 23:22:29,289 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 23:22:29,573 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 23:22:29,863 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 23:22:30,172 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 23:22:30,481 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 23:22:30,774 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 23:22:40,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:40,646 INFO L93 Difference]: Finished difference Result 87 states and 88 transitions. [2018-09-30 23:22:40,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-30 23:22:40,646 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 82 [2018-09-30 23:22:40,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:40,647 INFO L225 Difference]: With dead ends: 87 [2018-09-30 23:22:40,647 INFO L226 Difference]: Without dead ends: 85 [2018-09-30 23:22:40,648 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3082 ImplicationChecksByTransitivity, 22.1s TimeCoverageRelationStatistics Valid=6641, Invalid=19441, Unknown=0, NotChecked=0, Total=26082 [2018-09-30 23:22:40,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-30 23:22:40,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-30 23:22:40,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-30 23:22:40,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-09-30 23:22:40,652 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2018-09-30 23:22:40,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:40,652 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-09-30 23:22:40,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-30 23:22:40,653 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-09-30 23:22:40,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-30 23:22:40,653 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:40,653 INFO L375 BasicCegarLoop]: trace histogram [81, 1, 1, 1] [2018-09-30 23:22:40,653 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:40,654 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:40,654 INFO L82 PathProgramCache]: Analyzing trace with hash 423733288, now seen corresponding path program 41 times [2018-09-30 23:22:40,654 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:40,654 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:40,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:40,655 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:40,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:41,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:44,267 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:44,267 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:44,267 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:22:44,275 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:22:44,872 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-09-30 23:22:44,872 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:44,963 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:45,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:45,123 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:45,123 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 84 [2018-09-30 23:22:45,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-09-30 23:22:45,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-09-30 23:22:45,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=6972, Unknown=0, NotChecked=0, Total=7140 [2018-09-30 23:22:45,124 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 85 states. [2018-09-30 23:22:45,394 WARN L178 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 8 [2018-09-30 23:22:45,675 WARN L178 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 9 [2018-09-30 23:22:45,943 WARN L178 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2018-09-30 23:22:46,206 WARN L178 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2018-09-30 23:22:46,479 WARN L178 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2018-09-30 23:22:46,732 WARN L178 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2018-09-30 23:22:46,990 WARN L178 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2018-09-30 23:22:47,253 WARN L178 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2018-09-30 23:22:47,530 WARN L178 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-09-30 23:22:47,820 WARN L178 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-09-30 23:22:48,089 WARN L178 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-09-30 23:22:48,375 WARN L178 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-09-30 23:22:48,642 WARN L178 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-09-30 23:22:48,912 WARN L178 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-09-30 23:22:49,200 WARN L178 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-09-30 23:22:49,492 WARN L178 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-09-30 23:22:49,794 WARN L178 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-09-30 23:22:50,088 WARN L178 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-09-30 23:22:50,385 WARN L178 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-30 23:22:50,722 WARN L178 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-30 23:22:51,049 WARN L178 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-30 23:22:51,355 WARN L178 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-30 23:22:51,654 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-30 23:22:51,979 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-30 23:22:52,288 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 23:22:52,617 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 23:22:52,933 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 23:22:53,248 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 23:22:53,562 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 23:22:53,869 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 23:22:54,179 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 23:22:54,481 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 23:22:54,778 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 23:22:55,074 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 23:22:55,404 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 23:22:55,770 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 23:22:56,099 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-30 23:22:56,674 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 11 [2018-09-30 23:22:59,372 WARN L178 SmtUtils]: Spent 592.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 11 [2018-09-30 23:23:06,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:06,545 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2018-09-30 23:23:06,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-30 23:23:06,546 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 84 [2018-09-30 23:23:06,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:06,547 INFO L225 Difference]: With dead ends: 89 [2018-09-30 23:23:06,547 INFO L226 Difference]: Without dead ends: 87 [2018-09-30 23:23:06,548 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3241 ImplicationChecksByTransitivity, 24.3s TimeCoverageRelationStatistics Valid=6971, Invalid=20419, Unknown=0, NotChecked=0, Total=27390 [2018-09-30 23:23:06,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-30 23:23:06,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-09-30 23:23:06,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-30 23:23:06,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-09-30 23:23:06,554 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2018-09-30 23:23:06,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:06,554 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-09-30 23:23:06,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-09-30 23:23:06,554 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-09-30 23:23:06,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-30 23:23:06,555 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:06,555 INFO L375 BasicCegarLoop]: trace histogram [83, 1, 1, 1] [2018-09-30 23:23:06,555 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:06,555 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:06,555 INFO L82 PathProgramCache]: Analyzing trace with hash -814266552, now seen corresponding path program 42 times [2018-09-30 23:23:06,555 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:06,556 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:06,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:06,556 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:06,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:06,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:10,348 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:10,349 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:10,349 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:23:10,365 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:23:10,485 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-30 23:23:10,485 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:10,488 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:10,670 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:10,690 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:10,690 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 86 [2018-09-30 23:23:10,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-09-30 23:23:10,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-09-30 23:23:10,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=7310, Unknown=0, NotChecked=0, Total=7482 [2018-09-30 23:23:10,691 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 87 states. [2018-09-30 23:23:10,964 WARN L178 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 8 [2018-09-30 23:23:11,251 WARN L178 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 9 [2018-09-30 23:23:11,544 WARN L178 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2018-09-30 23:23:11,807 WARN L178 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2018-09-30 23:23:12,082 WARN L178 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2018-09-30 23:23:12,345 WARN L178 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2018-09-30 23:23:12,620 WARN L178 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2018-09-30 23:23:12,905 WARN L178 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2018-09-30 23:23:13,193 WARN L178 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2018-09-30 23:23:13,478 WARN L178 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2018-09-30 23:23:13,764 WARN L178 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-09-30 23:23:14,054 WARN L178 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-09-30 23:23:14,338 WARN L178 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-09-30 23:23:14,637 WARN L178 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-09-30 23:23:14,933 WARN L178 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-09-30 23:23:15,245 WARN L178 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-09-30 23:23:15,573 WARN L178 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-09-30 23:23:15,898 WARN L178 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-09-30 23:23:16,230 WARN L178 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-09-30 23:23:16,561 WARN L178 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-09-30 23:23:16,892 WARN L178 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-30 23:23:17,218 WARN L178 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-30 23:23:17,553 WARN L178 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-30 23:23:17,884 WARN L178 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-30 23:23:18,215 WARN L178 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-30 23:23:18,548 WARN L178 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-30 23:23:18,871 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 23:23:19,189 WARN L178 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 23:23:19,510 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 23:23:19,827 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 23:23:20,149 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 23:23:20,463 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 23:23:20,776 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 23:23:21,091 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 23:23:21,442 WARN L178 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 23:23:21,766 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 23:23:22,070 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 23:23:22,378 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 23:23:22,687 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-30 23:23:32,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:32,664 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2018-09-30 23:23:32,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-30 23:23:32,664 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 86 [2018-09-30 23:23:32,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:32,666 INFO L225 Difference]: With dead ends: 91 [2018-09-30 23:23:32,666 INFO L226 Difference]: Without dead ends: 89 [2018-09-30 23:23:32,667 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3404 ImplicationChecksByTransitivity, 25.0s TimeCoverageRelationStatistics Valid=7309, Invalid=21421, Unknown=0, NotChecked=0, Total=28730 [2018-09-30 23:23:32,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-30 23:23:32,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-09-30 23:23:32,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-30 23:23:32,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-09-30 23:23:32,673 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2018-09-30 23:23:32,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:32,673 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-09-30 23:23:32,673 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-09-30 23:23:32,673 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-09-30 23:23:32,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-30 23:23:32,674 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:32,674 INFO L375 BasicCegarLoop]: trace histogram [85, 1, 1, 1] [2018-09-30 23:23:32,674 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:32,674 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:32,674 INFO L82 PathProgramCache]: Analyzing trace with hash -826171800, now seen corresponding path program 43 times [2018-09-30 23:23:32,674 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:32,674 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:32,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:32,675 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:32,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:33,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:37,045 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:37,045 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:37,046 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:23:37,053 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:23:37,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:38,421 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:38,577 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:38,611 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:38,611 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 88 [2018-09-30 23:23:38,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-30 23:23:38,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-30 23:23:38,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=7656, Unknown=0, NotChecked=0, Total=7832 [2018-09-30 23:23:38,613 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 89 states. [2018-09-30 23:23:38,939 WARN L178 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 8 [2018-09-30 23:23:39,199 WARN L178 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 9 [2018-09-30 23:23:39,477 WARN L178 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 11 [2018-09-30 23:23:39,770 WARN L178 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 11 [2018-09-30 23:23:40,073 WARN L178 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2018-09-30 23:23:40,344 WARN L178 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2018-09-30 23:23:40,633 WARN L178 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2018-09-30 23:23:40,924 WARN L178 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2018-09-30 23:23:41,227 WARN L178 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2018-09-30 23:23:41,536 WARN L178 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2018-09-30 23:23:41,861 WARN L178 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2018-09-30 23:23:42,199 WARN L178 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2018-09-30 23:23:42,485 WARN L178 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-09-30 23:23:42,791 WARN L178 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-09-30 23:23:43,123 WARN L178 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-09-30 23:23:43,453 WARN L178 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-09-30 23:23:43,795 WARN L178 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-09-30 23:23:44,130 WARN L178 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-09-30 23:23:44,472 WARN L178 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-09-30 23:23:44,831 WARN L178 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-09-30 23:23:45,161 WARN L178 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-09-30 23:23:45,496 WARN L178 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-09-30 23:23:45,849 WARN L178 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-30 23:23:46,191 WARN L178 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-30 23:23:46,540 WARN L178 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-30 23:23:46,892 WARN L178 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-30 23:23:47,230 WARN L178 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-30 23:23:47,558 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-30 23:23:47,884 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 23:23:48,214 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 23:23:48,544 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 23:23:48,880 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 23:23:49,216 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 23:23:49,543 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 23:23:49,862 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 23:23:50,188 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 23:23:50,517 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 23:23:50,835 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 23:23:51,147 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 23:23:51,455 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 23:23:52,068 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-09-30 23:24:01,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:01,962 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2018-09-30 23:24:01,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-30 23:24:01,963 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 88 [2018-09-30 23:24:01,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:01,964 INFO L225 Difference]: With dead ends: 93 [2018-09-30 23:24:01,964 INFO L226 Difference]: Without dead ends: 91 [2018-09-30 23:24:01,965 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3571 ImplicationChecksByTransitivity, 26.9s TimeCoverageRelationStatistics Valid=7655, Invalid=22447, Unknown=0, NotChecked=0, Total=30102 [2018-09-30 23:24:01,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-30 23:24:01,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-30 23:24:01,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-30 23:24:01,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-09-30 23:24:01,970 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2018-09-30 23:24:01,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:01,970 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-09-30 23:24:01,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-30 23:24:01,970 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-09-30 23:24:01,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-30 23:24:01,971 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:01,971 INFO L375 BasicCegarLoop]: trace histogram [87, 1, 1, 1] [2018-09-30 23:24:01,971 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:01,971 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:01,971 INFO L82 PathProgramCache]: Analyzing trace with hash 617786760, now seen corresponding path program 44 times [2018-09-30 23:24:01,971 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:01,971 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:01,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:01,972 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:24:01,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:02,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:06,166 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:06,166 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:06,166 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:06,174 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:24:07,071 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:24:07,071 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:07,655 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:07,792 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:07,812 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:07,813 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 90 [2018-09-30 23:24:07,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-09-30 23:24:07,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-09-30 23:24:07,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=8010, Unknown=0, NotChecked=0, Total=8190 [2018-09-30 23:24:07,814 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 91 states. [2018-09-30 23:24:08,110 WARN L178 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 8 [2018-09-30 23:24:08,386 WARN L178 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 9 [2018-09-30 23:24:08,665 WARN L178 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 11 [2018-09-30 23:24:08,955 WARN L178 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 11 [2018-09-30 23:24:09,255 WARN L178 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 11 [2018-09-30 23:24:09,551 WARN L178 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 11 [2018-09-30 23:24:09,840 WARN L178 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2018-09-30 23:24:10,135 WARN L178 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2018-09-30 23:24:10,442 WARN L178 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2018-09-30 23:24:10,738 WARN L178 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2018-09-30 23:24:11,058 WARN L178 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2018-09-30 23:24:11,363 WARN L178 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2018-09-30 23:24:11,686 WARN L178 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2018-09-30 23:24:11,986 WARN L178 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2018-09-30 23:24:12,327 WARN L178 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-09-30 23:24:12,687 WARN L178 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-09-30 23:24:13,030 WARN L178 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-09-30 23:24:13,383 WARN L178 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-09-30 23:24:13,730 WARN L178 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-09-30 23:24:14,087 WARN L178 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-09-30 23:24:14,445 WARN L178 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-09-30 23:24:14,817 WARN L178 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-09-30 23:24:15,163 WARN L178 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-09-30 23:24:15,531 WARN L178 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-09-30 23:24:15,888 WARN L178 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-30 23:24:16,259 WARN L178 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-30 23:24:16,623 WARN L178 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-30 23:24:16,997 WARN L178 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-30 23:24:17,351 WARN L178 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-30 23:24:17,718 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-30 23:24:18,077 WARN L178 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 23:24:18,425 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 23:24:18,777 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 23:24:19,137 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 23:24:19,478 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 23:24:19,831 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 23:24:20,173 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 23:24:20,519 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 23:24:20,854 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 23:24:21,169 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 23:24:21,794 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 23:24:22,116 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-30 23:24:23,049 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 11 [2018-09-30 23:24:32,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:32,793 INFO L93 Difference]: Finished difference Result 95 states and 96 transitions. [2018-09-30 23:24:32,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-30 23:24:32,794 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 90 [2018-09-30 23:24:32,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:32,795 INFO L225 Difference]: With dead ends: 95 [2018-09-30 23:24:32,795 INFO L226 Difference]: Without dead ends: 93 [2018-09-30 23:24:32,796 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3742 ImplicationChecksByTransitivity, 28.3s TimeCoverageRelationStatistics Valid=8009, Invalid=23497, Unknown=0, NotChecked=0, Total=31506 [2018-09-30 23:24:32,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-30 23:24:32,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-30 23:24:32,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-30 23:24:32,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-09-30 23:24:32,801 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2018-09-30 23:24:32,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:32,802 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-09-30 23:24:32,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-09-30 23:24:32,802 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-09-30 23:24:32,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-30 23:24:32,802 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:32,803 INFO L375 BasicCegarLoop]: trace histogram [89, 1, 1, 1] [2018-09-30 23:24:32,803 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:32,803 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:32,803 INFO L82 PathProgramCache]: Analyzing trace with hash 987526312, now seen corresponding path program 45 times [2018-09-30 23:24:32,803 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:32,803 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:32,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:32,804 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:32,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:33,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:37,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:37,083 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:37,084 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:37,096 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:24:37,164 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-09-30 23:24:37,164 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:37,167 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:37,297 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:37,318 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:37,318 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 92 [2018-09-30 23:24:37,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-09-30 23:24:37,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-09-30 23:24:37,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=8372, Unknown=0, NotChecked=0, Total=8556 [2018-09-30 23:24:37,319 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 93 states. [2018-09-30 23:24:37,618 WARN L178 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 8 [2018-09-30 23:24:37,902 WARN L178 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 9 [2018-09-30 23:24:38,222 WARN L178 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 11 [2018-09-30 23:24:38,548 WARN L178 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 11 [2018-09-30 23:24:38,852 WARN L178 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 11 [2018-09-30 23:24:39,157 WARN L178 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 11 [2018-09-30 23:24:39,470 WARN L178 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 11 [2018-09-30 23:24:39,776 WARN L178 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 11 [2018-09-30 23:24:40,099 WARN L178 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2018-09-30 23:24:40,422 WARN L178 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2018-09-30 23:24:40,755 WARN L178 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2018-09-30 23:24:41,084 WARN L178 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2018-09-30 23:24:41,433 WARN L178 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2018-09-30 23:24:41,748 WARN L178 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2018-09-30 23:24:42,092 WARN L178 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2018-09-30 23:24:42,433 WARN L178 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2018-09-30 23:24:42,769 WARN L178 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-09-30 23:24:43,147 WARN L178 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-09-30 23:24:43,538 WARN L178 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-09-30 23:24:43,905 WARN L178 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-09-30 23:24:44,270 WARN L178 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-09-30 23:24:44,636 WARN L178 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-09-30 23:24:45,000 WARN L178 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-09-30 23:24:45,355 WARN L178 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-09-30 23:24:45,721 WARN L178 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-09-30 23:24:46,079 WARN L178 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-09-30 23:24:46,452 WARN L178 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-30 23:24:46,809 WARN L178 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-30 23:24:47,170 WARN L178 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-30 23:24:47,521 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-30 23:24:47,898 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-30 23:24:48,263 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-30 23:24:48,641 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 23:24:48,986 WARN L178 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 23:24:49,337 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 23:24:49,693 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 23:24:50,062 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 23:24:50,420 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 23:24:50,774 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 23:24:51,108 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 23:24:51,442 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 23:24:51,771 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 23:24:52,098 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 23:24:52,413 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 23:24:52,760 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-30 23:24:53,106 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-09-30 23:24:53,465 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 11 [2018-09-30 23:25:04,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:04,092 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2018-09-30 23:25:04,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-30 23:25:04,092 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 92 [2018-09-30 23:25:04,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:04,094 INFO L225 Difference]: With dead ends: 97 [2018-09-30 23:25:04,094 INFO L226 Difference]: Without dead ends: 95 [2018-09-30 23:25:04,095 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3917 ImplicationChecksByTransitivity, 30.1s TimeCoverageRelationStatistics Valid=8371, Invalid=24571, Unknown=0, NotChecked=0, Total=32942 [2018-09-30 23:25:04,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-30 23:25:04,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-30 23:25:04,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-30 23:25:04,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-09-30 23:25:04,102 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2018-09-30 23:25:04,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:04,102 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-09-30 23:25:04,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-09-30 23:25:04,102 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-09-30 23:25:04,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-30 23:25:04,103 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:04,103 INFO L375 BasicCegarLoop]: trace histogram [91, 1, 1, 1] [2018-09-30 23:25:04,103 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:04,103 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:04,103 INFO L82 PathProgramCache]: Analyzing trace with hash -175049784, now seen corresponding path program 46 times [2018-09-30 23:25:04,103 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:04,103 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:04,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:04,104 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:25:04,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:04,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:09,124 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:09,124 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:09,124 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:25:09,132 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:25:10,153 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:25:10,153 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:25:10,813 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:10,956 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:10,976 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:10,976 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 94 [2018-09-30 23:25:10,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-09-30 23:25:10,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-09-30 23:25:10,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=8742, Unknown=0, NotChecked=0, Total=8930 [2018-09-30 23:25:10,977 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 95 states. [2018-09-30 23:25:11,286 WARN L178 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 8 [2018-09-30 23:25:11,587 WARN L178 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 9 [2018-09-30 23:25:11,897 WARN L178 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 11 [2018-09-30 23:25:12,235 WARN L178 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 11 [2018-09-30 23:25:12,554 WARN L178 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 11 [2018-09-30 23:25:12,880 WARN L178 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 11 [2018-09-30 23:25:13,197 WARN L178 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 11 [2018-09-30 23:25:13,516 WARN L178 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 11 [2018-09-30 23:25:13,837 WARN L178 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 11 [2018-09-30 23:25:14,196 WARN L178 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 11 [2018-09-30 23:25:14,535 WARN L178 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2018-09-30 23:25:14,869 WARN L178 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2018-09-30 23:25:15,203 WARN L178 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2018-09-30 23:25:15,531 WARN L178 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2018-09-30 23:25:15,888 WARN L178 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2018-09-30 23:25:16,248 WARN L178 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2018-09-30 23:25:16,604 WARN L178 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2018-09-30 23:25:17,008 WARN L178 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2018-09-30 23:25:17,368 WARN L178 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-09-30 23:25:17,744 WARN L178 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-09-30 23:25:18,121 WARN L178 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-09-30 23:25:18,492 WARN L178 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-09-30 23:25:18,864 WARN L178 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-09-30 23:25:19,258 WARN L178 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-09-30 23:25:19,650 WARN L178 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-09-30 23:25:20,022 WARN L178 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-09-30 23:25:20,407 WARN L178 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-09-30 23:25:20,803 WARN L178 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-09-30 23:25:21,176 WARN L178 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-30 23:25:21,539 WARN L178 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-30 23:25:21,930 WARN L178 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-30 23:25:22,312 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-30 23:25:22,683 WARN L178 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-30 23:25:23,078 WARN L178 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-30 23:25:23,441 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 23:25:23,823 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 23:25:24,223 WARN L178 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 23:25:24,594 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 23:25:24,985 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 23:25:25,350 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 23:25:25,701 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 23:25:26,039 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 23:25:26,370 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 23:25:26,703 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 23:25:27,382 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 23:25:38,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:38,932 INFO L93 Difference]: Finished difference Result 99 states and 100 transitions. [2018-09-30 23:25:38,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-30 23:25:38,932 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 94 [2018-09-30 23:25:38,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:38,934 INFO L225 Difference]: With dead ends: 99 [2018-09-30 23:25:38,934 INFO L226 Difference]: Without dead ends: 97 [2018-09-30 23:25:38,935 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4096 ImplicationChecksByTransitivity, 32.1s TimeCoverageRelationStatistics Valid=8741, Invalid=25669, Unknown=0, NotChecked=0, Total=34410 [2018-09-30 23:25:38,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-30 23:25:38,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-30 23:25:38,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-30 23:25:38,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-09-30 23:25:38,941 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2018-09-30 23:25:38,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:38,941 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-09-30 23:25:38,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-09-30 23:25:38,941 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-09-30 23:25:38,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-30 23:25:38,941 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:38,941 INFO L375 BasicCegarLoop]: trace histogram [93, 1, 1, 1] [2018-09-30 23:25:38,942 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:38,942 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:38,942 INFO L82 PathProgramCache]: Analyzing trace with hash -719181080, now seen corresponding path program 47 times [2018-09-30 23:25:38,942 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:38,942 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:38,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:38,943 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:25:38,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:39,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:43,736 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:43,737 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:43,737 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:25:43,744 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:25:44,655 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-09-30 23:25:44,655 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:25:44,789 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:45,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:45,109 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:45,109 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 96 [2018-09-30 23:25:45,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-09-30 23:25:45,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-09-30 23:25:45,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=9120, Unknown=0, NotChecked=0, Total=9312 [2018-09-30 23:25:45,110 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 97 states. [2018-09-30 23:25:45,437 WARN L178 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 8 [2018-09-30 23:25:45,769 WARN L178 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 285 DAG size of output: 9 [2018-09-30 23:25:46,095 WARN L178 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 11 [2018-09-30 23:25:46,415 WARN L178 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 11 [2018-09-30 23:25:46,749 WARN L178 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 11 [2018-09-30 23:25:47,072 WARN L178 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 11 [2018-09-30 23:25:47,418 WARN L178 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 11 [2018-09-30 23:25:47,756 WARN L178 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 11 [2018-09-30 23:25:48,103 WARN L178 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 11 [2018-09-30 23:25:48,471 WARN L178 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 11 [2018-09-30 23:25:48,822 WARN L178 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 11 [2018-09-30 23:25:49,221 WARN L178 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 11 [2018-09-30 23:25:49,569 WARN L178 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2018-09-30 23:25:49,972 WARN L178 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2018-09-30 23:25:50,358 WARN L178 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2018-09-30 23:25:50,732 WARN L178 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2018-09-30 23:25:51,117 WARN L178 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2018-09-30 23:25:51,503 WARN L178 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2018-09-30 23:25:51,880 WARN L178 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2018-09-30 23:25:52,269 WARN L178 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2018-09-30 23:25:52,650 WARN L178 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-09-30 23:25:53,055 WARN L178 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-09-30 23:25:53,442 WARN L178 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-09-30 23:25:53,820 WARN L178 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-09-30 23:25:54,212 WARN L178 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-09-30 23:25:54,602 WARN L178 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-09-30 23:25:55,028 WARN L178 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-09-30 23:25:55,444 WARN L178 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-09-30 23:25:55,843 WARN L178 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-09-30 23:25:56,254 WARN L178 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-09-30 23:25:56,648 WARN L178 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-30 23:25:57,043 WARN L178 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-30 23:25:57,450 WARN L178 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-30 23:25:57,848 WARN L178 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-30 23:25:58,241 WARN L178 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-30 23:25:58,619 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-30 23:25:59,014 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 23:25:59,395 WARN L178 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 23:25:59,778 WARN L178 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 23:26:00,168 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 23:26:00,536 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 23:26:00,895 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 23:26:01,241 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 23:26:01,594 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 23:26:01,923 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 23:26:02,289 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 23:26:03,376 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-30 23:26:05,226 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 11 [2018-09-30 23:26:15,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:26:15,125 INFO L93 Difference]: Finished difference Result 101 states and 102 transitions. [2018-09-30 23:26:15,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-30 23:26:15,125 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 96 [2018-09-30 23:26:15,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:26:15,126 INFO L225 Difference]: With dead ends: 101 [2018-09-30 23:26:15,126 INFO L226 Difference]: Without dead ends: 99 [2018-09-30 23:26:15,128 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4279 ImplicationChecksByTransitivity, 34.0s TimeCoverageRelationStatistics Valid=9119, Invalid=26791, Unknown=0, NotChecked=0, Total=35910 [2018-09-30 23:26:15,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-30 23:26:15,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-30 23:26:15,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-30 23:26:15,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-09-30 23:26:15,134 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2018-09-30 23:26:15,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:26:15,134 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-09-30 23:26:15,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-09-30 23:26:15,135 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-09-30 23:26:15,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-30 23:26:15,135 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:26:15,135 INFO L375 BasicCegarLoop]: trace histogram [95, 1, 1, 1] [2018-09-30 23:26:15,135 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:26:15,135 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:26:15,136 INFO L82 PathProgramCache]: Analyzing trace with hash 356653576, now seen corresponding path program 48 times [2018-09-30 23:26:15,136 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:26:15,136 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:26:15,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:15,136 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:26:15,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:15,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:26:21,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:21,446 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:26:21,446 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:26:21,453 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:26:21,531 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-30 23:26:21,531 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:26:21,535 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:26:22,549 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:22,571 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:26:22,571 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 98 [2018-09-30 23:26:22,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-09-30 23:26:22,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-09-30 23:26:22,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=9506, Unknown=0, NotChecked=0, Total=9702 [2018-09-30 23:26:22,572 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 99 states. [2018-09-30 23:26:22,904 WARN L178 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 285 DAG size of output: 8 [2018-09-30 23:26:23,219 WARN L178 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 9 [2018-09-30 23:26:23,545 WARN L178 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 11 [2018-09-30 23:26:23,897 WARN L178 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 11 [2018-09-30 23:26:24,246 WARN L178 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 11 [2018-09-30 23:26:24,578 WARN L178 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 11 [2018-09-30 23:26:24,910 WARN L178 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 11 [2018-09-30 23:26:25,254 WARN L178 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 11 [2018-09-30 23:26:25,614 WARN L178 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 11 [2018-09-30 23:26:25,997 WARN L178 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 11 [2018-09-30 23:26:26,350 WARN L178 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 11 [2018-09-30 23:26:26,702 WARN L178 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 11 [2018-09-30 23:26:27,052 WARN L178 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 11 [2018-09-30 23:26:27,400 WARN L178 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 11 [2018-09-30 23:26:27,779 WARN L178 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2018-09-30 23:26:28,164 WARN L178 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2018-09-30 23:26:28,550 WARN L178 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2018-09-30 23:26:28,942 WARN L178 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2018-09-30 23:26:29,351 WARN L178 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2018-09-30 23:26:29,754 WARN L178 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2018-09-30 23:26:30,157 WARN L178 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2018-09-30 23:26:30,561 WARN L178 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2018-09-30 23:26:31,002 WARN L178 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-09-30 23:26:31,417 WARN L178 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-09-30 23:26:31,828 WARN L178 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-09-30 23:26:32,238 WARN L178 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-09-30 23:26:32,661 WARN L178 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-09-30 23:26:33,073 WARN L178 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-09-30 23:26:33,490 WARN L178 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-09-30 23:26:33,913 WARN L178 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-09-30 23:26:34,331 WARN L178 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-09-30 23:26:34,751 WARN L178 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-09-30 23:26:35,158 WARN L178 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-30 23:26:35,565 WARN L178 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-30 23:26:35,992 WARN L178 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-30 23:26:36,411 WARN L178 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-30 23:26:36,836 WARN L178 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-30 23:26:37,251 WARN L178 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-30 23:26:37,656 WARN L178 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 23:26:38,047 WARN L178 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 23:26:38,434 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 23:26:38,823 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 23:26:39,218 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 23:26:39,592 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 23:26:39,950 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 23:26:40,431 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 23:26:40,813 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 23:26:41,234 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 23:26:41,620 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 23:26:42,006 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 23:26:42,406 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-30 23:26:54,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:26:54,757 INFO L93 Difference]: Finished difference Result 103 states and 104 transitions. [2018-09-30 23:26:54,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-30 23:26:54,758 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 98 [2018-09-30 23:26:54,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:26:54,759 INFO L225 Difference]: With dead ends: 103 [2018-09-30 23:26:54,759 INFO L226 Difference]: Without dead ends: 101 [2018-09-30 23:26:54,761 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4466 ImplicationChecksByTransitivity, 38.3s TimeCoverageRelationStatistics Valid=9505, Invalid=27937, Unknown=0, NotChecked=0, Total=37442 [2018-09-30 23:26:54,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-30 23:26:54,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-30 23:26:54,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-30 23:26:54,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-09-30 23:26:54,767 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2018-09-30 23:26:54,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:26:54,767 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-09-30 23:26:54,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-09-30 23:26:54,767 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-09-30 23:26:54,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-30 23:26:54,768 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:26:54,768 INFO L375 BasicCegarLoop]: trace histogram [97, 1, 1, 1] [2018-09-30 23:26:54,768 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:26:54,768 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:26:54,768 INFO L82 PathProgramCache]: Analyzing trace with hash -853360344, now seen corresponding path program 49 times [2018-09-30 23:26:54,768 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:26:54,768 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:26:54,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:54,769 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:26:54,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:55,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:27:00,801 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:00,801 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:27:00,801 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:27:00,809 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:27:02,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:27:02,951 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:27:03,518 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:03,539 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:27:03,539 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 100 [2018-09-30 23:27:03,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-30 23:27:03,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-30 23:27:03,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=9900, Unknown=0, NotChecked=0, Total=10100 [2018-09-30 23:27:03,540 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 101 states. [2018-09-30 23:27:03,881 WARN L178 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 8 [2018-09-30 23:27:04,219 WARN L178 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 297 DAG size of output: 9 [2018-09-30 23:27:04,559 WARN L178 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 11 [2018-09-30 23:27:04,897 WARN L178 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 11 [2018-09-30 23:27:05,252 WARN L178 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 11 [2018-09-30 23:27:05,591 WARN L178 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 11 [2018-09-30 23:27:05,946 WARN L178 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 11 [2018-09-30 23:27:06,300 WARN L178 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 11 [2018-09-30 23:27:06,673 WARN L178 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 11 [2018-09-30 23:27:07,048 WARN L178 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 11 [2018-09-30 23:27:07,415 WARN L178 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 11 [2018-09-30 23:27:07,781 WARN L178 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 11 [2018-09-30 23:27:08,140 WARN L178 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 11 [2018-09-30 23:27:08,504 WARN L178 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 11 [2018-09-30 23:27:08,893 WARN L178 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 11 [2018-09-30 23:27:09,301 WARN L178 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 11 [2018-09-30 23:27:09,694 WARN L178 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2018-09-30 23:27:10,106 WARN L178 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2018-09-30 23:27:10,512 WARN L178 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2018-09-30 23:27:10,923 WARN L178 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2018-09-30 23:27:11,339 WARN L178 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2018-09-30 23:27:11,783 WARN L178 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2018-09-30 23:27:12,196 WARN L178 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2018-09-30 23:27:12,612 WARN L178 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2018-09-30 23:27:13,028 WARN L178 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-09-30 23:27:13,462 WARN L178 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-09-30 23:27:13,877 WARN L178 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-09-30 23:27:14,305 WARN L178 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-09-30 23:27:14,736 WARN L178 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-09-30 23:27:15,150 WARN L178 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-09-30 23:27:15,578 WARN L178 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-09-30 23:27:16,013 WARN L178 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-09-30 23:27:16,435 WARN L178 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-09-30 23:27:16,893 WARN L178 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-09-30 23:27:17,321 WARN L178 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-30 23:27:17,745 WARN L178 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-30 23:27:18,173 WARN L178 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-30 23:27:18,592 WARN L178 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-30 23:27:18,999 WARN L178 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-30 23:27:19,396 WARN L178 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-30 23:27:19,799 WARN L178 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 23:27:20,220 WARN L178 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 23:27:20,611 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 23:27:21,010 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 23:27:21,396 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 23:27:21,796 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 23:27:22,200 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 23:27:22,605 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 23:27:23,005 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 23:27:23,396 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 23:27:24,163 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 23:27:36,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:27:36,794 INFO L93 Difference]: Finished difference Result 105 states and 106 transitions. [2018-09-30 23:27:36,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-09-30 23:27:36,795 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 100 [2018-09-30 23:27:36,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:27:36,796 INFO L225 Difference]: With dead ends: 105 [2018-09-30 23:27:36,796 INFO L226 Difference]: Without dead ends: 103 [2018-09-30 23:27:36,797 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4657 ImplicationChecksByTransitivity, 38.6s TimeCoverageRelationStatistics Valid=9899, Invalid=29107, Unknown=0, NotChecked=0, Total=39006 [2018-09-30 23:27:36,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-30 23:27:36,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-30 23:27:36,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-30 23:27:36,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-09-30 23:27:36,804 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2018-09-30 23:27:36,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:27:36,805 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-09-30 23:27:36,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-30 23:27:36,805 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-09-30 23:27:36,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-30 23:27:36,806 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:27:36,806 INFO L375 BasicCegarLoop]: trace histogram [99, 1, 1, 1] [2018-09-30 23:27:36,806 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:27:36,806 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:27:36,806 INFO L82 PathProgramCache]: Analyzing trace with hash 259399752, now seen corresponding path program 50 times [2018-09-30 23:27:36,806 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:27:36,807 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:27:36,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:36,807 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:27:36,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:37,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:27:42,157 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:42,158 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:27:42,158 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:27:42,168 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:27:43,480 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:27:43,481 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:27:44,342 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:27:44,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:44,756 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:27:44,756 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 102 [2018-09-30 23:27:44,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-09-30 23:27:44,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-09-30 23:27:44,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=10302, Unknown=0, NotChecked=0, Total=10506 [2018-09-30 23:27:44,757 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 103 states. [2018-09-30 23:27:45,165 WARN L178 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 297 DAG size of output: 8 [2018-09-30 23:27:45,512 WARN L178 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 9 [2018-09-30 23:27:45,862 WARN L178 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 11 [2018-09-30 23:27:46,235 WARN L178 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 11 [2018-09-30 23:27:46,605 WARN L178 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 11 [2018-09-30 23:27:46,982 WARN L178 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 11 [2018-09-30 23:27:47,345 WARN L178 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 11 [2018-09-30 23:27:47,750 WARN L178 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 11 [2018-09-30 23:27:48,138 WARN L178 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 11 [2018-09-30 23:27:48,537 WARN L178 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 11 [2018-09-30 23:27:48,924 WARN L178 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 11 [2018-09-30 23:27:49,334 WARN L178 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 11 [2018-09-30 23:27:49,731 WARN L178 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 11 [2018-09-30 23:27:50,114 WARN L178 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 11 [2018-09-30 23:27:50,542 WARN L178 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 11 [2018-09-30 23:27:50,959 WARN L178 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 11 [2018-09-30 23:27:51,380 WARN L178 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 11 [2018-09-30 23:27:51,823 WARN L178 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 11 [2018-09-30 23:27:52,248 WARN L178 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2018-09-30 23:27:52,690 WARN L178 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2018-09-30 23:27:53,137 WARN L178 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2018-09-30 23:27:53,573 WARN L178 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2018-09-30 23:27:54,018 WARN L178 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2018-09-30 23:27:54,459 WARN L178 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2018-09-30 23:27:54,907 WARN L178 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2018-09-30 23:27:55,374 WARN L178 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2018-09-30 23:27:55,812 WARN L178 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-09-30 23:27:56,307 WARN L178 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-09-30 23:27:56,774 WARN L178 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-09-30 23:27:57,222 WARN L178 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-09-30 23:27:57,660 WARN L178 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-09-30 23:27:58,132 WARN L178 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-09-30 23:27:58,575 WARN L178 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-09-30 23:27:59,010 WARN L178 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-09-30 23:27:59,438 WARN L178 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-09-30 23:27:59,876 WARN L178 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-09-30 23:28:00,304 WARN L178 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-30 23:28:00,731 WARN L178 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-30 23:28:01,151 WARN L178 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-30 23:28:01,554 WARN L178 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-30 23:28:01,965 WARN L178 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-30 23:28:02,371 WARN L178 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-30 23:28:02,780 WARN L178 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 23:28:03,214 WARN L178 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 23:28:03,604 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 23:28:04,037 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 23:28:04,458 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 23:28:04,890 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 23:28:05,318 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 23:28:05,742 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 23:28:06,163 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 23:28:06,569 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 23:28:06,974 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 23:28:07,391 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 23:28:07,788 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-30 23:28:08,242 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-09-30 23:28:20,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:28:20,331 INFO L93 Difference]: Finished difference Result 107 states and 108 transitions. [2018-09-30 23:28:20,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-30 23:28:20,331 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 102 [2018-09-30 23:28:20,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:28:20,333 INFO L225 Difference]: With dead ends: 107 [2018-09-30 23:28:20,333 INFO L226 Difference]: Without dead ends: 105 [2018-09-30 23:28:20,335 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4852 ImplicationChecksByTransitivity, 39.9s TimeCoverageRelationStatistics Valid=10301, Invalid=30301, Unknown=0, NotChecked=0, Total=40602 [2018-09-30 23:28:20,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-09-30 23:28:20,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-09-30 23:28:20,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-30 23:28:20,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-09-30 23:28:20,342 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2018-09-30 23:28:20,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:28:20,342 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-09-30 23:28:20,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-09-30 23:28:20,342 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-09-30 23:28:20,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-30 23:28:20,343 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:28:20,343 INFO L375 BasicCegarLoop]: trace histogram [101, 1, 1, 1] [2018-09-30 23:28:20,343 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:28:20,343 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:28:20,343 INFO L82 PathProgramCache]: Analyzing trace with hash 174995304, now seen corresponding path program 51 times [2018-09-30 23:28:20,344 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:28:20,344 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:28:20,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:20,344 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:28:20,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:21,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:28:26,400 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:26,400 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:28:26,401 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:28:26,409 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:28:26,520 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-09-30 23:28:26,520 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:28:26,523 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:28:26,670 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:26,692 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:28:26,692 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 104 [2018-09-30 23:28:26,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-09-30 23:28:26,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-09-30 23:28:26,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=10712, Unknown=0, NotChecked=0, Total=10920 [2018-09-30 23:28:26,693 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 105 states. [2018-09-30 23:28:27,089 WARN L178 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 8 [2018-09-30 23:28:27,461 WARN L178 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 309 DAG size of output: 9 [2018-09-30 23:28:27,829 WARN L178 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 11 [2018-09-30 23:28:28,192 WARN L178 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 11 [2018-09-30 23:28:28,579 WARN L178 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 11 [2018-09-30 23:28:29,009 WARN L178 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 11 [2018-09-30 23:28:29,401 WARN L178 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 11 [2018-09-30 23:28:29,793 WARN L178 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 11 [2018-09-30 23:28:30,188 WARN L178 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 11 [2018-09-30 23:28:30,625 WARN L178 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 11 [2018-09-30 23:28:31,039 WARN L178 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 11 [2018-09-30 23:28:31,447 WARN L178 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 11 [2018-09-30 23:28:31,845 WARN L178 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 11 [2018-09-30 23:28:32,275 WARN L178 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 11 [2018-09-30 23:28:32,719 WARN L178 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 11 [2018-09-30 23:28:33,153 WARN L178 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 11 [2018-09-30 23:28:33,574 WARN L178 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 11 [2018-09-30 23:28:34,021 WARN L178 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 11 [2018-09-30 23:28:34,446 WARN L178 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 11 [2018-09-30 23:28:34,877 WARN L178 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 11 [2018-09-30 23:28:35,328 WARN L178 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2018-09-30 23:28:35,770 WARN L178 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2018-09-30 23:28:36,206 WARN L178 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2018-09-30 23:28:36,650 WARN L178 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2018-09-30 23:28:37,098 WARN L178 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2018-09-30 23:28:37,558 WARN L178 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2018-09-30 23:28:37,998 WARN L178 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2018-09-30 23:28:38,437 WARN L178 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2018-09-30 23:28:38,909 WARN L178 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-09-30 23:28:39,390 WARN L178 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-09-30 23:28:39,850 WARN L178 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-09-30 23:28:40,322 WARN L178 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-09-30 23:28:40,778 WARN L178 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-09-30 23:28:41,238 WARN L178 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-09-30 23:28:41,696 WARN L178 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-09-30 23:28:42,153 WARN L178 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-09-30 23:28:42,593 WARN L178 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-09-30 23:28:43,038 WARN L178 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-09-30 23:28:43,494 WARN L178 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-30 23:28:43,926 WARN L178 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-30 23:28:44,359 WARN L178 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-30 23:28:44,778 WARN L178 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-30 23:28:45,198 WARN L178 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-30 23:28:45,605 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-30 23:28:46,001 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 23:28:46,450 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 23:28:46,887 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 23:28:47,334 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 23:28:47,779 WARN L178 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 23:28:48,217 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 23:28:48,656 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 23:28:49,123 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 23:28:49,582 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 23:28:50,002 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 23:28:50,439 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 23:28:50,865 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 23:29:04,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:29:04,341 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2018-09-30 23:29:04,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-09-30 23:29:04,341 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 104 [2018-09-30 23:29:04,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:29:04,342 INFO L225 Difference]: With dead ends: 109 [2018-09-30 23:29:04,342 INFO L226 Difference]: Without dead ends: 107 [2018-09-30 23:29:04,344 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5051 ImplicationChecksByTransitivity, 42.5s TimeCoverageRelationStatistics Valid=10711, Invalid=31519, Unknown=0, NotChecked=0, Total=42230 [2018-09-30 23:29:04,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-30 23:29:04,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-30 23:29:04,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-30 23:29:04,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-09-30 23:29:04,352 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2018-09-30 23:29:04,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:29:04,352 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-09-30 23:29:04,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-09-30 23:29:04,352 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-09-30 23:29:04,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-30 23:29:04,353 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:29:04,353 INFO L375 BasicCegarLoop]: trace histogram [103, 1, 1, 1] [2018-09-30 23:29:04,353 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:29:04,353 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:29:04,353 INFO L82 PathProgramCache]: Analyzing trace with hash 666699400, now seen corresponding path program 52 times [2018-09-30 23:29:04,353 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:29:04,354 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:29:04,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:04,354 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:29:04,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:05,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:29:10,733 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:29:10,733 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:29:10,733 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:29:10,743 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:29:12,207 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:29:12,207 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:29:13,167 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:29:13,327 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:29:13,348 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:29:13,348 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 106 [2018-09-30 23:29:13,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-09-30 23:29:13,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-09-30 23:29:13,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=11130, Unknown=0, NotChecked=0, Total=11342 [2018-09-30 23:29:13,350 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 107 states. [2018-09-30 23:29:13,759 WARN L178 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 309 DAG size of output: 8 [2018-09-30 23:29:14,138 WARN L178 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 9 [2018-09-30 23:29:14,508 WARN L178 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 11 [2018-09-30 23:29:14,928 WARN L178 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 11 [2018-09-30 23:29:15,319 WARN L178 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 11 [2018-09-30 23:29:15,730 WARN L178 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 11 [2018-09-30 23:29:16,136 WARN L178 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 11 [2018-09-30 23:29:16,538 WARN L178 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 11 [2018-09-30 23:29:16,964 WARN L178 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 11 [2018-09-30 23:29:17,384 WARN L178 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 11 [2018-09-30 23:29:17,792 WARN L178 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 11 [2018-09-30 23:29:18,193 WARN L178 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 11 [2018-09-30 23:29:18,604 WARN L178 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 11 [2018-09-30 23:29:18,998 WARN L178 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 11 [2018-09-30 23:29:19,444 WARN L178 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 11 [2018-09-30 23:29:19,933 WARN L178 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 11 [2018-09-30 23:29:20,358 WARN L178 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 11 [2018-09-30 23:29:20,793 WARN L178 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 11 [2018-09-30 23:29:21,250 WARN L178 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 11 [2018-09-30 23:29:21,687 WARN L178 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 11 [2018-09-30 23:29:22,134 WARN L178 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 11 [2018-09-30 23:29:22,603 WARN L178 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 11 [2018-09-30 23:29:23,061 WARN L178 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2018-09-30 23:29:23,525 WARN L178 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2018-09-30 23:29:23,989 WARN L178 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2018-09-30 23:29:24,458 WARN L178 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2018-09-30 23:29:24,949 WARN L178 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2018-09-30 23:29:25,423 WARN L178 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2018-09-30 23:29:25,911 WARN L178 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2018-09-30 23:29:26,390 WARN L178 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2018-09-30 23:29:26,874 WARN L178 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-09-30 23:29:27,346 WARN L178 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-09-30 23:29:27,836 WARN L178 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-09-30 23:29:28,320 WARN L178 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-09-30 23:29:28,806 WARN L178 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-09-30 23:29:29,278 WARN L178 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-09-30 23:29:29,748 WARN L178 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-09-30 23:29:30,229 WARN L178 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-09-30 23:29:30,683 WARN L178 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-09-30 23:29:31,134 WARN L178 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-09-30 23:29:31,561 WARN L178 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-30 23:29:32,001 WARN L178 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-30 23:29:32,423 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-30 23:29:32,842 WARN L178 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-30 23:29:33,256 WARN L178 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-30 23:29:33,711 WARN L178 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-30 23:29:34,150 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 23:29:34,610 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 23:29:35,099 WARN L178 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 23:29:35,589 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 23:29:36,032 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 23:29:36,491 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 23:29:36,923 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 23:29:37,354 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 23:29:37,782 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 23:29:38,211 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 23:29:38,632 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 23:29:39,057 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 23:29:52,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:29:52,617 INFO L93 Difference]: Finished difference Result 111 states and 112 transitions. [2018-09-30 23:29:52,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-09-30 23:29:52,618 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 106 [2018-09-30 23:29:52,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:29:52,619 INFO L225 Difference]: With dead ends: 111 [2018-09-30 23:29:52,619 INFO L226 Difference]: Without dead ends: 109 [2018-09-30 23:29:52,621 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5254 ImplicationChecksByTransitivity, 44.4s TimeCoverageRelationStatistics Valid=11129, Invalid=32761, Unknown=0, NotChecked=0, Total=43890 [2018-09-30 23:29:52,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-30 23:29:52,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-30 23:29:52,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-30 23:29:52,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-09-30 23:29:52,628 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2018-09-30 23:29:52,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:29:52,629 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-09-30 23:29:52,629 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-09-30 23:29:52,629 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-09-30 23:29:52,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-30 23:29:52,629 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:29:52,630 INFO L375 BasicCegarLoop]: trace histogram [105, 1, 1, 1] [2018-09-30 23:29:52,630 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:29:52,630 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:29:52,630 INFO L82 PathProgramCache]: Analyzing trace with hash 747933096, now seen corresponding path program 53 times [2018-09-30 23:29:52,630 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:29:52,630 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:29:52,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:52,631 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:29:52,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:53,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:29:59,158 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:29:59,158 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:29:59,158 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:29:59,169 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:30:00,429 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-09-30 23:30:00,430 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:30:00,625 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:30:00,948 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:30:00,968 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:30:00,968 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 108 [2018-09-30 23:30:00,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-09-30 23:30:00,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-09-30 23:30:00,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=11556, Unknown=0, NotChecked=0, Total=11772 [2018-09-30 23:30:00,969 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 109 states. [2018-09-30 23:30:01,364 WARN L178 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 8 [2018-09-30 23:30:01,752 WARN L178 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 9 [2018-09-30 23:30:02,138 WARN L178 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 11 [2018-09-30 23:30:02,533 WARN L178 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 11 [2018-09-30 23:30:02,956 WARN L178 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 11 [2018-09-30 23:30:03,362 WARN L178 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 11 [2018-09-30 23:30:03,772 WARN L178 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 11 [2018-09-30 23:30:04,178 WARN L178 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 11 [2018-09-30 23:30:04,594 WARN L178 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 11 [2018-09-30 23:30:05,066 WARN L178 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 11 [2018-09-30 23:30:05,485 WARN L178 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 11 [2018-09-30 23:30:05,935 WARN L178 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 11 [2018-09-30 23:30:06,357 WARN L178 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 11 [2018-09-30 23:30:06,789 WARN L178 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 11 [2018-09-30 23:30:07,227 WARN L178 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 11 [2018-09-30 23:30:07,670 WARN L178 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 11 [2018-09-30 23:30:08,103 WARN L178 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 11 [2018-09-30 23:30:08,578 WARN L178 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 11 [2018-09-30 23:30:09,019 WARN L178 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 11 [2018-09-30 23:30:09,472 WARN L178 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 11 [2018-09-30 23:30:09,928 WARN L178 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 11 [2018-09-30 23:30:10,391 WARN L178 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 11 [2018-09-30 23:30:10,891 WARN L178 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 11 [2018-09-30 23:30:11,373 WARN L178 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 11 [2018-09-30 23:30:11,855 WARN L178 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2018-09-30 23:30:12,335 WARN L178 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2018-09-30 23:30:12,825 WARN L178 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2018-09-30 23:30:13,299 WARN L178 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2018-09-30 23:30:13,799 WARN L178 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2018-09-30 23:30:14,302 WARN L178 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2018-09-30 23:30:14,796 WARN L178 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2018-09-30 23:30:15,291 WARN L178 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2018-09-30 23:30:15,791 WARN L178 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-09-30 23:30:16,327 WARN L178 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-09-30 23:30:16,825 WARN L178 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-09-30 23:30:17,311 WARN L178 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-09-30 23:30:17,780 WARN L178 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-09-30 23:30:18,326 WARN L178 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-09-30 23:30:18,808 WARN L178 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-09-30 23:30:19,292 WARN L178 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-09-30 23:30:19,759 WARN L178 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-09-30 23:30:20,217 WARN L178 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-09-30 23:30:20,691 WARN L178 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-30 23:30:21,160 WARN L178 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-30 23:30:21,614 WARN L178 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-30 23:30:22,107 WARN L178 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-30 23:30:22,592 WARN L178 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-30 23:30:23,066 WARN L178 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-30 23:30:23,549 WARN L178 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 23:30:24,038 WARN L178 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 23:30:24,508 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 23:30:24,985 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 23:30:25,478 WARN L178 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 23:30:25,941 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 23:30:26,415 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 23:30:26,867 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 23:30:27,322 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 23:30:27,785 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 23:30:28,224 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 23:30:28,690 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 23:30:42,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:30:42,713 INFO L93 Difference]: Finished difference Result 113 states and 114 transitions. [2018-09-30 23:30:42,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-09-30 23:30:42,714 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 108 [2018-09-30 23:30:42,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:30:42,715 INFO L225 Difference]: With dead ends: 113 [2018-09-30 23:30:42,715 INFO L226 Difference]: Without dead ends: 111 [2018-09-30 23:30:42,717 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5461 ImplicationChecksByTransitivity, 47.0s TimeCoverageRelationStatistics Valid=11555, Invalid=34027, Unknown=0, NotChecked=0, Total=45582 [2018-09-30 23:30:42,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-30 23:30:42,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-09-30 23:30:42,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-30 23:30:42,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-09-30 23:30:42,722 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2018-09-30 23:30:42,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:30:42,722 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-09-30 23:30:42,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-09-30 23:30:42,723 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-09-30 23:30:42,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-30 23:30:42,723 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:30:42,723 INFO L375 BasicCegarLoop]: trace histogram [107, 1, 1, 1] [2018-09-30 23:30:42,723 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:30:42,723 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:30:42,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1504103624, now seen corresponding path program 54 times [2018-09-30 23:30:42,724 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:30:42,724 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:30:42,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:42,724 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:30:42,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:43,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-09-30 23:30:47,569 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-30 23:30:47,574 WARN L206 ceAbstractionStarter]: Timeout [2018-09-30 23:30:47,574 INFO L202 PluginConnector]: Adding new model count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.09 11:30:47 BoogieIcfgContainer [2018-09-30 23:30:47,574 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-30 23:30:47,575 INFO L168 Benchmark]: Toolchain (without parser) took 796419.06 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -110.6 MB). Free memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: 314.0 MB). Peak memory consumption was 203.4 MB. Max. memory is 7.1 GB. [2018-09-30 23:30:47,575 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 23:30:47,575 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.84 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 23:30:47,576 INFO L168 Benchmark]: Boogie Preprocessor took 22.65 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 23:30:47,576 INFO L168 Benchmark]: RCFGBuilder took 268.29 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-30 23:30:47,576 INFO L168 Benchmark]: TraceAbstraction took 796080.67 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -110.6 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 292.8 MB). Peak memory consumption was 182.2 MB. Max. memory is 7.1 GB. [2018-09-30 23:30:47,576 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 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 41.84 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 22.65 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 268.29 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 796080.67 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -110.6 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 292.8 MB). Peak memory consumption was 182.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 39]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 39). Cancelled while BasicCegarLoop was analyzing trace of length 111 with TraceHistMax 107, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 91 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 796.0s OverallTime, 55 OverallIterations, 107 TraceHistogramMax, 633.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 162 SDtfs, 0 SDslu, 2889 SDs, 0 SdLazy, 6044 SolverSat, 2809 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 8.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8640 GetRequests, 2916 SyntacticMatches, 0 SemanticMatches, 5724 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97890 ImplicationChecksByTransitivity, 736.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=111occurred in iteration=54, 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, 54 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 28.3s SatisfiabilityAnalysisTime, 126.8s InterpolantComputationTime, 5939 NumberOfCodeBlocks, 5939 NumberOfCodeBlocksAsserted, 845 NumberOfCheckSat, 5832 ConstructedInterpolants, 0 QuantifiedInterpolants, 2081862 SizeOfPredicates, 106 NumberOfNonLiveVariables, 9328 ConjunctsInSsa, 3004 ConjunctsInUnsatCore, 107 InterpolantComputations, 1 PerfectInterpolantSequences, 0/201294 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.bplTransformedIcfg_BEv2_3.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-30_23-30-47-583.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-30_23-30-47-583.csv Completed graceful shutdown