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/down.i_4.bplTransformedIcfg_BEv2_5.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d19836b [2018-09-26 21:16:22,052 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-26 21:16:22,054 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-26 21:16:22,067 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-26 21:16:22,068 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-26 21:16:22,069 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-26 21:16:22,070 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-26 21:16:22,072 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-26 21:16:22,074 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-26 21:16:22,075 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-26 21:16:22,075 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-26 21:16:22,076 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-26 21:16:22,079 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-26 21:16:22,080 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-26 21:16:22,081 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-26 21:16:22,082 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-26 21:16:22,083 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-26 21:16:22,085 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-26 21:16:22,087 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-26 21:16:22,089 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-26 21:16:22,090 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-26 21:16:22,091 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-26 21:16:22,094 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-26 21:16:22,094 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-26 21:16:22,094 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-26 21:16:22,095 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-26 21:16:22,096 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-26 21:16:22,097 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-26 21:16:22,098 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-26 21:16:22,099 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-26 21:16:22,099 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-26 21:16:22,100 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-26 21:16:22,100 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-26 21:16:22,101 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-26 21:16:22,102 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-26 21:16:22,102 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-26 21:16:22,103 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 [2018-09-26 21:16:22,120 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-26 21:16:22,121 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-26 21:16:22,121 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-26 21:16:22,122 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-26 21:16:22,122 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-26 21:16:22,123 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-26 21:16:22,124 INFO L133 SettingsManager]: * Use SBE=true [2018-09-26 21:16:22,124 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-26 21:16:22,124 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-26 21:16:22,124 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-26 21:16:22,125 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-26 21:16:22,125 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-26 21:16:22,125 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-26 21:16:22,125 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-26 21:16:22,125 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-26 21:16:22,126 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-26 21:16:22,126 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-26 21:16:22,126 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-26 21:16:22,126 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-26 21:16:22,126 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-26 21:16:22,127 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-26 21:16:22,127 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-26 21:16:22,127 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-26 21:16:22,127 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-26 21:16:22,128 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-26 21:16:22,129 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-26 21:16:22,129 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-26 21:16:22,129 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-26 21:16:22,129 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-26 21:16:22,129 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-26 21:16:22,186 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-26 21:16:22,203 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-26 21:16:22,210 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-26 21:16:22,212 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-26 21:16:22,212 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-26 21:16:22,213 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/down.i_4.bplTransformedIcfg_BEv2_5.bpl [2018-09-26 21:16:22,213 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/down.i_4.bplTransformedIcfg_BEv2_5.bpl' [2018-09-26 21:16:22,276 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-26 21:16:22,280 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-26 21:16:22,281 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-26 21:16:22,281 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-26 21:16:22,281 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-26 21:16:22,303 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:16:22" (1/1) ... [2018-09-26 21:16:22,316 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:16:22" (1/1) ... [2018-09-26 21:16:22,324 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-26 21:16:22,325 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-26 21:16:22,325 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-26 21:16:22,325 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-26 21:16:22,337 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:16:22" (1/1) ... [2018-09-26 21:16:22,338 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:16:22" (1/1) ... [2018-09-26 21:16:22,338 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:16:22" (1/1) ... [2018-09-26 21:16:22,339 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:16:22" (1/1) ... [2018-09-26 21:16:22,344 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:16:22" (1/1) ... [2018-09-26 21:16:22,347 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:16:22" (1/1) ... [2018-09-26 21:16:22,348 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:16:22" (1/1) ... [2018-09-26 21:16:22,350 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-26 21:16:22,351 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-26 21:16:22,351 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-26 21:16:22,352 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-26 21:16:22,353 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:16:22" (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 [2018-09-26 21:16:22,435 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-09-26 21:16:22,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-26 21:16:22,436 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-26 21:16:22,689 INFO L346 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-26 21:16:22,690 INFO L202 PluginConnector]: Adding new model down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:16:22 BoogieIcfgContainer [2018-09-26 21:16:22,690 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-26 21:16:22,691 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-26 21:16:22,691 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-26 21:16:22,695 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-26 21:16:22,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:16:22" (1/2) ... [2018-09-26 21:16:22,696 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a5c6d12 and model type down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.09 09:16:22, skipping insertion in model container [2018-09-26 21:16:22,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:16:22" (2/2) ... [2018-09-26 21:16:22,698 INFO L112 eAbstractionObserver]: Analyzing ICFG down.i_4.bplTransformedIcfg_BEv2_5.bpl [2018-09-26 21:16:22,710 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-26 21:16:22,718 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-26 21:16:22,768 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-26 21:16:22,769 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-26 21:16:22,770 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-26 21:16:22,770 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-26 21:16:22,770 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-26 21:16:22,770 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-26 21:16:22,770 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-26 21:16:22,771 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-26 21:16:22,771 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-26 21:16:22,786 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2018-09-26 21:16:22,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-26 21:16:22,793 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:22,794 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:16:22,795 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:22,801 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:22,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1951930377, now seen corresponding path program 1 times [2018-09-26 21:16:22,804 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:22,805 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:22,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:22,853 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:16:22,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:22,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:22,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:22,955 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:16:22,955 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-26 21:16:22,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-26 21:16:22,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-26 21:16:22,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-26 21:16:22,981 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2018-09-26 21:16:23,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:23,091 INFO L93 Difference]: Finished difference Result 23 states and 30 transitions. [2018-09-26 21:16:23,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-26 21:16:23,094 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-09-26 21:16:23,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:23,105 INFO L225 Difference]: With dead ends: 23 [2018-09-26 21:16:23,105 INFO L226 Difference]: Without dead ends: 15 [2018-09-26 21:16:23,109 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 [2018-09-26 21:16:23,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-26 21:16:23,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 13. [2018-09-26 21:16:23,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-26 21:16:23,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 17 transitions. [2018-09-26 21:16:23,149 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 17 transitions. Word has length 7 [2018-09-26 21:16:23,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:23,149 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 17 transitions. [2018-09-26 21:16:23,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-26 21:16:23,150 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 17 transitions. [2018-09-26 21:16:23,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-26 21:16:23,150 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:23,150 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:16:23,151 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:23,151 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:23,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1951989959, now seen corresponding path program 1 times [2018-09-26 21:16:23,151 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:23,152 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:23,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:23,153 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:16:23,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:23,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:23,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:23,226 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:16:23,226 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-26 21:16:23,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-26 21:16:23,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-26 21:16:23,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-26 21:16:23,229 INFO L87 Difference]: Start difference. First operand 13 states and 17 transitions. Second operand 4 states. [2018-09-26 21:16:23,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:23,328 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2018-09-26 21:16:23,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-26 21:16:23,329 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2018-09-26 21:16:23,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:23,329 INFO L225 Difference]: With dead ends: 20 [2018-09-26 21:16:23,330 INFO L226 Difference]: Without dead ends: 13 [2018-09-26 21:16:23,331 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-09-26 21:16:23,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-26 21:16:23,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-26 21:16:23,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-26 21:16:23,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2018-09-26 21:16:23,338 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 7 [2018-09-26 21:16:23,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:23,338 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2018-09-26 21:16:23,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-26 21:16:23,339 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2018-09-26 21:16:23,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-26 21:16:23,339 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:23,339 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:16:23,340 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:23,340 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:23,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1455783312, now seen corresponding path program 1 times [2018-09-26 21:16:23,341 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:23,341 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:23,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:23,343 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:16:23,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:23,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:23,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-26 21:16:23,398 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:16:23,398 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-26 21:16:23,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-26 21:16:23,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-26 21:16:23,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-26 21:16:23,399 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand 4 states. [2018-09-26 21:16:23,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:23,467 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2018-09-26 21:16:23,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-26 21:16:23,468 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-09-26 21:16:23,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:23,469 INFO L225 Difference]: With dead ends: 19 [2018-09-26 21:16:23,469 INFO L226 Difference]: Without dead ends: 17 [2018-09-26 21:16:23,470 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-09-26 21:16:23,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-26 21:16:23,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 13. [2018-09-26 21:16:23,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-26 21:16:23,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2018-09-26 21:16:23,475 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 8 [2018-09-26 21:16:23,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:23,475 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2018-09-26 21:16:23,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-26 21:16:23,476 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2018-09-26 21:16:23,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-26 21:16:23,476 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:23,476 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:16:23,477 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:23,477 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:23,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1455723730, now seen corresponding path program 1 times [2018-09-26 21:16:23,477 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:23,478 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:23,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:23,479 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:16:23,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:23,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:23,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:23,542 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:16:23,542 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-26 21:16:23,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-26 21:16:23,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-26 21:16:23,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-26 21:16:23,544 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 4 states. [2018-09-26 21:16:23,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:23,619 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2018-09-26 21:16:23,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-26 21:16:23,620 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-09-26 21:16:23,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:23,621 INFO L225 Difference]: With dead ends: 25 [2018-09-26 21:16:23,621 INFO L226 Difference]: Without dead ends: 19 [2018-09-26 21:16:23,621 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-26 21:16:23,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-26 21:16:23,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2018-09-26 21:16:23,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-26 21:16:23,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2018-09-26 21:16:23,632 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 8 [2018-09-26 21:16:23,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:23,633 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2018-09-26 21:16:23,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-26 21:16:23,633 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2018-09-26 21:16:23,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-26 21:16:23,634 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:23,634 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:16:23,634 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:23,635 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:23,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1394403420, now seen corresponding path program 1 times [2018-09-26 21:16:23,635 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:23,635 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:23,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:23,637 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:16:23,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:23,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:23,783 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:23,783 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:23,784 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 [2018-09-26 21:16:23,796 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:16:23,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:23,846 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:23,878 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:23,911 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:23,911 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-26 21:16:23,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-26 21:16:23,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-26 21:16:23,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-09-26 21:16:23,912 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 6 states. [2018-09-26 21:16:24,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:24,136 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2018-09-26 21:16:24,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-26 21:16:24,136 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2018-09-26 21:16:24,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:24,137 INFO L225 Difference]: With dead ends: 31 [2018-09-26 21:16:24,137 INFO L226 Difference]: Without dead ends: 16 [2018-09-26 21:16:24,138 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:16:24,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-26 21:16:24,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-26 21:16:24,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-26 21:16:24,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2018-09-26 21:16:24,143 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2018-09-26 21:16:24,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:24,143 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2018-09-26 21:16:24,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-26 21:16:24,144 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2018-09-26 21:16:24,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:16:24,144 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:24,145 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:16:24,145 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:24,145 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:24,145 INFO L82 PathProgramCache]: Analyzing trace with hash -961145443, now seen corresponding path program 2 times [2018-09-26 21:16:24,146 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:24,146 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:24,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:24,147 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:16:24,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:24,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:24,206 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:24,207 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:24,207 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:16:24,215 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:16:24,230 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:16:24,231 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:16:24,232 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:24,237 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:24,259 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:24,259 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-26 21:16:24,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-26 21:16:24,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-26 21:16:24,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-26 21:16:24,261 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states. [2018-09-26 21:16:24,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:24,354 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2018-09-26 21:16:24,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-26 21:16:24,355 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-09-26 21:16:24,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:24,356 INFO L225 Difference]: With dead ends: 30 [2018-09-26 21:16:24,356 INFO L226 Difference]: Without dead ends: 24 [2018-09-26 21:16:24,357 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-26 21:16:24,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-26 21:16:24,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2018-09-26 21:16:24,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-26 21:16:24,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2018-09-26 21:16:24,363 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 13 [2018-09-26 21:16:24,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:24,364 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2018-09-26 21:16:24,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-26 21:16:24,364 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2018-09-26 21:16:24,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:16:24,365 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:24,365 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2018-09-26 21:16:24,365 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:24,366 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:24,366 INFO L82 PathProgramCache]: Analyzing trace with hash -552275309, now seen corresponding path program 3 times [2018-09-26 21:16:24,366 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:24,366 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:24,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:24,368 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:16:24,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:24,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:24,579 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:24,580 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:24,580 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 [2018-09-26 21:16:24,591 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:16:24,629 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-26 21:16:24,630 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:16:24,632 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:24,639 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:24,661 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:24,662 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:16:24,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:16:24,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:16:24,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:16:24,663 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 8 states. [2018-09-26 21:16:24,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:24,764 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2018-09-26 21:16:24,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:16:24,765 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2018-09-26 21:16:24,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:24,766 INFO L225 Difference]: With dead ends: 40 [2018-09-26 21:16:24,766 INFO L226 Difference]: Without dead ends: 21 [2018-09-26 21:16:24,767 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:16:24,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-26 21:16:24,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-26 21:16:24,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-26 21:16:24,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2018-09-26 21:16:24,773 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 17 [2018-09-26 21:16:24,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:24,773 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2018-09-26 21:16:24,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:16:24,773 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2018-09-26 21:16:24,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-26 21:16:24,774 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:24,774 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1] [2018-09-26 21:16:24,775 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:24,775 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:24,775 INFO L82 PathProgramCache]: Analyzing trace with hash 2071906362, now seen corresponding path program 4 times [2018-09-26 21:16:24,775 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:24,775 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:24,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:24,776 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:16:24,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:24,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:24,860 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:24,860 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:24,860 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:16:24,871 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:16:24,886 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:16:24,886 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:16:24,888 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:24,895 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:24,917 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:24,917 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-26 21:16:24,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-26 21:16:24,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-26 21:16:24,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-26 21:16:24,918 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 6 states. [2018-09-26 21:16:25,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:25,185 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2018-09-26 21:16:25,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-26 21:16:25,186 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2018-09-26 21:16:25,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:25,187 INFO L225 Difference]: With dead ends: 35 [2018-09-26 21:16:25,187 INFO L226 Difference]: Without dead ends: 29 [2018-09-26 21:16:25,187 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-26 21:16:25,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-26 21:16:25,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2018-09-26 21:16:25,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-26 21:16:25,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2018-09-26 21:16:25,194 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 18 [2018-09-26 21:16:25,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:25,195 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2018-09-26 21:16:25,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-26 21:16:25,195 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2018-09-26 21:16:25,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-26 21:16:25,196 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:25,196 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:16:25,196 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:25,196 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:25,197 INFO L82 PathProgramCache]: Analyzing trace with hash -992407888, now seen corresponding path program 5 times [2018-09-26 21:16:25,197 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:25,197 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:25,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:25,198 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:16:25,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:25,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:25,383 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:25,383 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:25,383 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 [2018-09-26 21:16:25,400 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:16:25,426 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-26 21:16:25,427 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:16:25,430 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:25,439 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:25,464 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:25,464 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:16:25,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:16:25,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:16:25,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:16:25,465 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 10 states. [2018-09-26 21:16:25,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:25,756 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2018-09-26 21:16:25,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:16:25,756 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2018-09-26 21:16:25,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:25,758 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:16:25,758 INFO L226 Difference]: Without dead ends: 26 [2018-09-26 21:16:25,758 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2018-09-26 21:16:25,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-26 21:16:25,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-26 21:16:25,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:16:25,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2018-09-26 21:16:25,764 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 22 [2018-09-26 21:16:25,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:25,765 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2018-09-26 21:16:25,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:16:25,765 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2018-09-26 21:16:25,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-26 21:16:25,766 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:25,766 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:16:25,766 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:25,766 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:25,767 INFO L82 PathProgramCache]: Analyzing trace with hash 390441321, now seen corresponding path program 6 times [2018-09-26 21:16:25,767 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:25,767 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:25,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:25,768 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:16:25,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:25,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:25,859 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:25,860 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:25,860 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:16:25,875 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:16:25,893 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-26 21:16:25,893 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:16:25,897 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:25,906 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:25,927 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:25,928 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-26 21:16:25,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-26 21:16:25,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-26 21:16:25,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-26 21:16:25,929 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 7 states. [2018-09-26 21:16:26,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:26,045 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2018-09-26 21:16:26,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-26 21:16:26,046 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2018-09-26 21:16:26,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:26,046 INFO L225 Difference]: With dead ends: 40 [2018-09-26 21:16:26,047 INFO L226 Difference]: Without dead ends: 34 [2018-09-26 21:16:26,047 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-26 21:16:26,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-26 21:16:26,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2018-09-26 21:16:26,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:16:26,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2018-09-26 21:16:26,055 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 23 [2018-09-26 21:16:26,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:26,055 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2018-09-26 21:16:26,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-26 21:16:26,056 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2018-09-26 21:16:26,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-26 21:16:26,056 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:26,057 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1] [2018-09-26 21:16:26,057 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:26,057 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:26,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1927135327, now seen corresponding path program 7 times [2018-09-26 21:16:26,058 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:26,058 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:26,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:26,059 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:16:26,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:26,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:26,234 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 40 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:26,234 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:26,235 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 [2018-09-26 21:16:26,245 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:16:26,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:26,271 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:26,280 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 40 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:26,306 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:26,306 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-26 21:16:26,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-26 21:16:26,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-26 21:16:26,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2018-09-26 21:16:26,307 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 12 states. [2018-09-26 21:16:26,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:26,612 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2018-09-26 21:16:26,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-26 21:16:26,612 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2018-09-26 21:16:26,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:26,615 INFO L225 Difference]: With dead ends: 58 [2018-09-26 21:16:26,615 INFO L226 Difference]: Without dead ends: 31 [2018-09-26 21:16:26,616 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2018-09-26 21:16:26,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-26 21:16:26,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-26 21:16:26,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-26 21:16:26,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2018-09-26 21:16:26,629 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 27 [2018-09-26 21:16:26,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:26,630 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2018-09-26 21:16:26,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-26 21:16:26,630 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2018-09-26 21:16:26,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-26 21:16:26,632 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:26,632 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1] [2018-09-26 21:16:26,632 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:26,632 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:26,632 INFO L82 PathProgramCache]: Analyzing trace with hash -906890938, now seen corresponding path program 8 times [2018-09-26 21:16:26,633 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:26,633 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:26,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:26,634 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:16:26,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:26,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:26,821 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 23 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:26,821 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:26,821 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 [2018-09-26 21:16:26,835 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:16:26,861 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:16:26,862 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:16:26,863 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:26,873 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 23 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:26,895 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:26,895 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:16:26,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:16:26,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:16:26,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:16:26,897 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 8 states. [2018-09-26 21:16:27,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:27,002 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2018-09-26 21:16:27,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:16:27,002 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2018-09-26 21:16:27,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:27,003 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:16:27,003 INFO L226 Difference]: Without dead ends: 39 [2018-09-26 21:16:27,004 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:16:27,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-26 21:16:27,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2018-09-26 21:16:27,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-26 21:16:27,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2018-09-26 21:16:27,011 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 28 [2018-09-26 21:16:27,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:27,012 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2018-09-26 21:16:27,012 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:16:27,012 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2018-09-26 21:16:27,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-26 21:16:27,013 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:27,013 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1] [2018-09-26 21:16:27,013 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:27,013 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:27,014 INFO L82 PathProgramCache]: Analyzing trace with hash -466038340, now seen corresponding path program 9 times [2018-09-26 21:16:27,014 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:27,014 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:27,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:27,015 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:16:27,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:27,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:27,167 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 60 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:27,167 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:27,168 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 [2018-09-26 21:16:27,177 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:16:27,278 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-26 21:16:27,279 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:16:27,282 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:27,293 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 60 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:27,328 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:27,328 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-26 21:16:27,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-26 21:16:27,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-26 21:16:27,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2018-09-26 21:16:27,330 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 14 states. [2018-09-26 21:16:27,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:27,829 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2018-09-26 21:16:27,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-26 21:16:27,830 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 32 [2018-09-26 21:16:27,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:27,830 INFO L225 Difference]: With dead ends: 67 [2018-09-26 21:16:27,831 INFO L226 Difference]: Without dead ends: 36 [2018-09-26 21:16:27,832 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2018-09-26 21:16:27,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-26 21:16:27,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-26 21:16:27,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-26 21:16:27,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2018-09-26 21:16:27,839 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 32 [2018-09-26 21:16:27,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:27,839 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2018-09-26 21:16:27,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-26 21:16:27,840 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2018-09-26 21:16:27,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-26 21:16:27,841 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:27,841 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 1, 1, 1, 1, 1] [2018-09-26 21:16:27,841 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:27,841 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:27,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1282545973, now seen corresponding path program 10 times [2018-09-26 21:16:27,842 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:27,842 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:27,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:27,843 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:16:27,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:27,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:27,998 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 31 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:27,998 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:27,999 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:16:28,008 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:16:28,026 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:16:28,026 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:16:28,028 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:28,039 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 31 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:28,059 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:28,059 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:16:28,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:16:28,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:16:28,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:16:28,060 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 9 states. [2018-09-26 21:16:28,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:28,404 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2018-09-26 21:16:28,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:16:28,405 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2018-09-26 21:16:28,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:28,406 INFO L225 Difference]: With dead ends: 50 [2018-09-26 21:16:28,406 INFO L226 Difference]: Without dead ends: 44 [2018-09-26 21:16:28,407 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:16:28,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-26 21:16:28,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2018-09-26 21:16:28,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-26 21:16:28,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2018-09-26 21:16:28,416 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 33 [2018-09-26 21:16:28,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:28,416 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2018-09-26 21:16:28,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:16:28,416 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2018-09-26 21:16:28,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-26 21:16:28,417 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:28,417 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1] [2018-09-26 21:16:28,418 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:28,418 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:28,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1500867115, now seen corresponding path program 11 times [2018-09-26 21:16:28,418 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:28,418 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:28,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:28,419 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:16:28,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:28,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:28,614 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 84 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:28,614 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:28,614 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:16:28,622 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:16:28,648 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-26 21:16:28,649 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:16:28,652 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:28,664 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 84 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:28,696 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:28,696 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-26 21:16:28,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-26 21:16:28,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-26 21:16:28,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2018-09-26 21:16:28,697 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 16 states. [2018-09-26 21:16:28,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:28,977 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2018-09-26 21:16:28,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-26 21:16:28,977 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 37 [2018-09-26 21:16:28,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:28,978 INFO L225 Difference]: With dead ends: 76 [2018-09-26 21:16:28,978 INFO L226 Difference]: Without dead ends: 41 [2018-09-26 21:16:28,979 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=365, Unknown=0, NotChecked=0, Total=506 [2018-09-26 21:16:28,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-26 21:16:28,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-26 21:16:28,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-26 21:16:28,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2018-09-26 21:16:28,986 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 37 [2018-09-26 21:16:28,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:28,986 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2018-09-26 21:16:28,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-26 21:16:28,987 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2018-09-26 21:16:28,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-26 21:16:28,988 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:28,988 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 1, 1, 1, 1, 1] [2018-09-26 21:16:28,988 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:28,988 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:28,989 INFO L82 PathProgramCache]: Analyzing trace with hash 594208338, now seen corresponding path program 12 times [2018-09-26 21:16:28,989 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:28,989 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:28,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:28,990 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:16:28,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:28,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:29,087 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 40 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:29,087 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:29,088 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:16:29,095 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:16:29,123 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-26 21:16:29,124 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:16:29,127 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:29,137 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 40 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:29,159 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:29,160 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:16:29,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:16:29,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:16:29,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:16:29,161 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 10 states. [2018-09-26 21:16:29,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:29,322 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2018-09-26 21:16:29,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:16:29,322 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2018-09-26 21:16:29,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:29,323 INFO L225 Difference]: With dead ends: 55 [2018-09-26 21:16:29,323 INFO L226 Difference]: Without dead ends: 49 [2018-09-26 21:16:29,324 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:16:29,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-26 21:16:29,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2018-09-26 21:16:29,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-26 21:16:29,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2018-09-26 21:16:29,332 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 38 [2018-09-26 21:16:29,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:29,332 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2018-09-26 21:16:29,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:16:29,332 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2018-09-26 21:16:29,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-26 21:16:29,333 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:29,333 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 1, 1, 1, 1, 1] [2018-09-26 21:16:29,334 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:29,334 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:29,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1054367944, now seen corresponding path program 13 times [2018-09-26 21:16:29,334 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:29,334 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:29,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:29,335 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:16:29,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:29,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:29,544 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 112 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:29,544 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:29,544 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 [2018-09-26 21:16:29,553 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:16:29,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:29,572 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:29,583 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 112 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:29,607 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:29,607 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-26 21:16:29,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-26 21:16:29,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-26 21:16:29,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2018-09-26 21:16:29,608 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 18 states. [2018-09-26 21:16:30,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:30,090 INFO L93 Difference]: Finished difference Result 85 states and 89 transitions. [2018-09-26 21:16:30,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-26 21:16:30,091 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 42 [2018-09-26 21:16:30,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:30,092 INFO L225 Difference]: With dead ends: 85 [2018-09-26 21:16:30,092 INFO L226 Difference]: Without dead ends: 46 [2018-09-26 21:16:30,093 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2018-09-26 21:16:30,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-26 21:16:30,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-26 21:16:30,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-26 21:16:30,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2018-09-26 21:16:30,101 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 42 [2018-09-26 21:16:30,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:30,101 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2018-09-26 21:16:30,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-26 21:16:30,101 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2018-09-26 21:16:30,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-26 21:16:30,102 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:30,102 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 1, 1, 1, 1, 1] [2018-09-26 21:16:30,103 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:30,103 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:30,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1098736897, now seen corresponding path program 14 times [2018-09-26 21:16:30,103 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:30,103 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:30,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:30,104 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:16:30,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:30,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:30,459 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 50 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:30,461 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:30,461 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 [2018-09-26 21:16:30,471 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:16:30,507 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:16:30,508 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:16:30,510 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:30,533 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 50 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:30,567 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:30,568 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:16:30,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:16:30,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:16:30,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:16:30,569 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 11 states. [2018-09-26 21:16:30,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:30,682 INFO L93 Difference]: Finished difference Result 60 states and 63 transitions. [2018-09-26 21:16:30,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:16:30,683 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2018-09-26 21:16:30,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:30,683 INFO L225 Difference]: With dead ends: 60 [2018-09-26 21:16:30,683 INFO L226 Difference]: Without dead ends: 54 [2018-09-26 21:16:30,684 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:16:30,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-26 21:16:30,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2018-09-26 21:16:30,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-26 21:16:30,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2018-09-26 21:16:30,694 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 43 [2018-09-26 21:16:30,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:30,695 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2018-09-26 21:16:30,695 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:16:30,695 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2018-09-26 21:16:30,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-26 21:16:30,696 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:30,696 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 1, 1, 1, 1, 1] [2018-09-26 21:16:30,696 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:30,697 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:30,697 INFO L82 PathProgramCache]: Analyzing trace with hash -48369673, now seen corresponding path program 15 times [2018-09-26 21:16:30,697 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:30,697 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:30,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:30,698 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:16:30,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:30,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:30,970 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 144 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:30,970 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:30,970 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:16:30,978 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:16:31,006 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-26 21:16:31,006 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:16:31,009 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:31,020 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 144 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:31,047 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:31,047 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-26 21:16:31,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-26 21:16:31,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-26 21:16:31,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2018-09-26 21:16:31,048 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 20 states. [2018-09-26 21:16:31,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:31,818 INFO L93 Difference]: Finished difference Result 94 states and 98 transitions. [2018-09-26 21:16:31,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-26 21:16:31,819 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 47 [2018-09-26 21:16:31,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:31,819 INFO L225 Difference]: With dead ends: 94 [2018-09-26 21:16:31,820 INFO L226 Difference]: Without dead ends: 51 [2018-09-26 21:16:31,821 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=217, Invalid=595, Unknown=0, NotChecked=0, Total=812 [2018-09-26 21:16:31,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-26 21:16:31,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-26 21:16:31,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-26 21:16:31,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2018-09-26 21:16:31,829 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 47 [2018-09-26 21:16:31,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:31,829 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2018-09-26 21:16:31,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-26 21:16:31,829 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2018-09-26 21:16:31,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-26 21:16:31,830 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:31,830 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 1, 1, 1, 1, 1] [2018-09-26 21:16:31,831 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:31,831 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:31,831 INFO L82 PathProgramCache]: Analyzing trace with hash 239052638, now seen corresponding path program 16 times [2018-09-26 21:16:31,831 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:31,831 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:31,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:31,832 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:16:31,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:31,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:31,994 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 61 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:31,994 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:31,994 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 [2018-09-26 21:16:32,002 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:16:32,025 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:16:32,025 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:16:32,027 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:32,039 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 61 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:32,069 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:32,069 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-26 21:16:32,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-26 21:16:32,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-26 21:16:32,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-26 21:16:32,071 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 12 states. [2018-09-26 21:16:32,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:32,211 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2018-09-26 21:16:32,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-26 21:16:32,212 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2018-09-26 21:16:32,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:32,213 INFO L225 Difference]: With dead ends: 65 [2018-09-26 21:16:32,213 INFO L226 Difference]: Without dead ends: 59 [2018-09-26 21:16:32,214 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-26 21:16:32,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-26 21:16:32,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2018-09-26 21:16:32,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-26 21:16:32,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2018-09-26 21:16:32,222 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 48 [2018-09-26 21:16:32,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:32,222 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2018-09-26 21:16:32,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-26 21:16:32,222 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2018-09-26 21:16:32,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-26 21:16:32,223 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:32,223 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 1, 1, 1, 1, 1] [2018-09-26 21:16:32,223 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:32,224 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:32,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1074641876, now seen corresponding path program 17 times [2018-09-26 21:16:32,224 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:32,224 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:32,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:32,225 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:16:32,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:32,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:32,576 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 180 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:32,577 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:32,577 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 [2018-09-26 21:16:32,584 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:16:32,617 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-26 21:16:32,617 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:16:32,620 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:32,631 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 180 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:32,660 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:32,660 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-26 21:16:32,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-26 21:16:32,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-26 21:16:32,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2018-09-26 21:16:32,661 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 22 states. [2018-09-26 21:16:33,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:33,275 INFO L93 Difference]: Finished difference Result 103 states and 107 transitions. [2018-09-26 21:16:33,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-26 21:16:33,275 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2018-09-26 21:16:33,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:33,276 INFO L225 Difference]: With dead ends: 103 [2018-09-26 21:16:33,276 INFO L226 Difference]: Without dead ends: 56 [2018-09-26 21:16:33,277 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=261, Invalid=731, Unknown=0, NotChecked=0, Total=992 [2018-09-26 21:16:33,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-26 21:16:33,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-26 21:16:33,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-26 21:16:33,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2018-09-26 21:16:33,284 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 52 [2018-09-26 21:16:33,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:33,284 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2018-09-26 21:16:33,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-26 21:16:33,284 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2018-09-26 21:16:33,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-26 21:16:33,285 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:33,285 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 1, 1, 1, 1, 1] [2018-09-26 21:16:33,285 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:33,285 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:33,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1305899827, now seen corresponding path program 18 times [2018-09-26 21:16:33,286 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:33,286 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:33,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:33,287 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:16:33,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:33,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:33,449 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 73 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:33,449 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:33,449 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 [2018-09-26 21:16:33,456 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:16:33,489 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-26 21:16:33,489 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:16:33,492 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:33,502 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 73 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:33,525 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:33,525 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-26 21:16:33,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-26 21:16:33,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-26 21:16:33,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-26 21:16:33,526 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 13 states. [2018-09-26 21:16:33,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:33,593 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2018-09-26 21:16:33,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-26 21:16:33,595 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 53 [2018-09-26 21:16:33,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:33,596 INFO L225 Difference]: With dead ends: 70 [2018-09-26 21:16:33,597 INFO L226 Difference]: Without dead ends: 64 [2018-09-26 21:16:33,598 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-26 21:16:33,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-26 21:16:33,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 60. [2018-09-26 21:16:33,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-26 21:16:33,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2018-09-26 21:16:33,607 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 53 [2018-09-26 21:16:33,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:33,607 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2018-09-26 21:16:33,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-26 21:16:33,607 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2018-09-26 21:16:33,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-26 21:16:33,608 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:33,608 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 1, 1, 1, 1, 1] [2018-09-26 21:16:33,608 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:33,611 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:33,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1754878403, now seen corresponding path program 19 times [2018-09-26 21:16:33,611 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:33,611 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:33,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:33,612 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:16:33,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:33,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:33,939 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 220 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:33,940 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:33,940 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 [2018-09-26 21:16:33,947 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:16:33,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:33,981 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:33,996 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 220 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:34,027 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:34,027 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-26 21:16:34,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-26 21:16:34,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-26 21:16:34,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2018-09-26 21:16:34,029 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 24 states. [2018-09-26 21:16:34,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:34,464 INFO L93 Difference]: Finished difference Result 112 states and 116 transitions. [2018-09-26 21:16:34,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-26 21:16:34,464 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 57 [2018-09-26 21:16:34,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:34,465 INFO L225 Difference]: With dead ends: 112 [2018-09-26 21:16:34,465 INFO L226 Difference]: Without dead ends: 61 [2018-09-26 21:16:34,466 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=309, Invalid=881, Unknown=0, NotChecked=0, Total=1190 [2018-09-26 21:16:34,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-26 21:16:34,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-26 21:16:34,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-26 21:16:34,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2018-09-26 21:16:34,479 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 57 [2018-09-26 21:16:34,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:34,479 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2018-09-26 21:16:34,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-26 21:16:34,479 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2018-09-26 21:16:34,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-26 21:16:34,481 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:34,481 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 1, 1, 1, 1, 1] [2018-09-26 21:16:34,481 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:34,481 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:34,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1471794070, now seen corresponding path program 20 times [2018-09-26 21:16:34,482 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:34,482 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:34,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:34,483 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:16:34,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:34,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:35,571 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 86 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:35,571 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:35,572 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 [2018-09-26 21:16:35,580 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:16:35,608 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:16:35,609 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:16:35,610 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:35,621 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 86 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:35,644 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:35,645 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-26 21:16:35,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-26 21:16:35,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-26 21:16:35,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-26 21:16:35,646 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 14 states. [2018-09-26 21:16:35,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:35,789 INFO L93 Difference]: Finished difference Result 75 states and 78 transitions. [2018-09-26 21:16:35,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-26 21:16:35,790 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 58 [2018-09-26 21:16:35,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:35,791 INFO L225 Difference]: With dead ends: 75 [2018-09-26 21:16:35,791 INFO L226 Difference]: Without dead ends: 69 [2018-09-26 21:16:35,791 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-26 21:16:35,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-26 21:16:35,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 65. [2018-09-26 21:16:35,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-26 21:16:35,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2018-09-26 21:16:35,798 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 58 [2018-09-26 21:16:35,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:35,798 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2018-09-26 21:16:35,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-26 21:16:35,798 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2018-09-26 21:16:35,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-26 21:16:35,799 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:35,799 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 1, 1, 1, 1, 1] [2018-09-26 21:16:35,799 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:35,799 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:35,799 INFO L82 PathProgramCache]: Analyzing trace with hash 716104416, now seen corresponding path program 21 times [2018-09-26 21:16:35,800 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:35,800 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:35,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:35,800 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:16:35,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:35,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:36,105 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 264 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:36,105 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:36,106 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:16:36,115 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:16:36,189 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-26 21:16:36,189 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:16:36,191 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:36,203 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 264 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:36,233 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:36,233 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-26 21:16:36,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-26 21:16:36,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-26 21:16:36,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2018-09-26 21:16:36,234 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 26 states. [2018-09-26 21:16:36,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:36,816 INFO L93 Difference]: Finished difference Result 121 states and 125 transitions. [2018-09-26 21:16:36,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-26 21:16:36,817 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 62 [2018-09-26 21:16:36,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:36,818 INFO L225 Difference]: With dead ends: 121 [2018-09-26 21:16:36,818 INFO L226 Difference]: Without dead ends: 66 [2018-09-26 21:16:36,819 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=361, Invalid=1045, Unknown=0, NotChecked=0, Total=1406 [2018-09-26 21:16:36,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-26 21:16:36,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-09-26 21:16:36,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-26 21:16:36,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2018-09-26 21:16:36,826 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 62 [2018-09-26 21:16:36,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:36,827 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2018-09-26 21:16:36,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-26 21:16:36,827 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2018-09-26 21:16:36,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-26 21:16:36,827 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:36,827 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 1, 1, 1, 1, 1] [2018-09-26 21:16:36,828 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:36,828 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:36,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1699180391, now seen corresponding path program 22 times [2018-09-26 21:16:36,828 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:36,828 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:36,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:36,829 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:16:36,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:36,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:37,756 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 100 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:37,756 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:37,756 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) [2018-09-26 21:16:37,771 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:16:37,809 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:16:37,810 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:16:37,811 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:37,825 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 100 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:37,851 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:37,851 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-26 21:16:37,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-26 21:16:37,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-26 21:16:37,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-26 21:16:37,852 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 15 states. [2018-09-26 21:16:37,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:37,948 INFO L93 Difference]: Finished difference Result 80 states and 83 transitions. [2018-09-26 21:16:37,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-26 21:16:37,948 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 63 [2018-09-26 21:16:37,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:37,949 INFO L225 Difference]: With dead ends: 80 [2018-09-26 21:16:37,949 INFO L226 Difference]: Without dead ends: 74 [2018-09-26 21:16:37,949 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-26 21:16:37,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-26 21:16:37,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 70. [2018-09-26 21:16:37,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-26 21:16:37,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2018-09-26 21:16:37,958 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 63 [2018-09-26 21:16:37,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:37,959 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2018-09-26 21:16:37,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-26 21:16:37,959 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2018-09-26 21:16:37,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-09-26 21:16:37,960 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:37,960 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 1, 1, 1, 1, 1] [2018-09-26 21:16:37,960 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:37,961 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:37,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1490448497, now seen corresponding path program 23 times [2018-09-26 21:16:37,961 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:37,961 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:37,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:37,962 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:16:37,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:37,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:38,601 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 312 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:38,601 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:38,601 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:16:38,610 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:16:38,658 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-26 21:16:38,658 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:16:38,660 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:38,673 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 312 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:38,694 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:38,694 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-26 21:16:38,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-26 21:16:38,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-26 21:16:38,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2018-09-26 21:16:38,695 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 28 states. [2018-09-26 21:16:39,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:39,194 INFO L93 Difference]: Finished difference Result 130 states and 134 transitions. [2018-09-26 21:16:39,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-26 21:16:39,195 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 67 [2018-09-26 21:16:39,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:39,196 INFO L225 Difference]: With dead ends: 130 [2018-09-26 21:16:39,196 INFO L226 Difference]: Without dead ends: 71 [2018-09-26 21:16:39,197 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=417, Invalid=1223, Unknown=0, NotChecked=0, Total=1640 [2018-09-26 21:16:39,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-26 21:16:39,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-26 21:16:39,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-26 21:16:39,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2018-09-26 21:16:39,204 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 67 [2018-09-26 21:16:39,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:39,204 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2018-09-26 21:16:39,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-26 21:16:39,205 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2018-09-26 21:16:39,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-26 21:16:39,205 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:39,205 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 1, 1, 1, 1, 1] [2018-09-26 21:16:39,206 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:39,206 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:39,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1188334966, now seen corresponding path program 24 times [2018-09-26 21:16:39,206 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:39,206 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:39,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:39,207 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:16:39,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:39,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:39,397 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 115 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:39,397 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:39,397 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 [2018-09-26 21:16:39,404 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:16:39,443 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-26 21:16:39,444 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:16:39,446 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:39,458 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 115 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:39,480 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:39,481 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-26 21:16:39,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-26 21:16:39,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-26 21:16:39,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-26 21:16:39,481 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 16 states. [2018-09-26 21:16:39,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:39,626 INFO L93 Difference]: Finished difference Result 85 states and 88 transitions. [2018-09-26 21:16:39,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-26 21:16:39,626 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 68 [2018-09-26 21:16:39,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:39,627 INFO L225 Difference]: With dead ends: 85 [2018-09-26 21:16:39,627 INFO L226 Difference]: Without dead ends: 79 [2018-09-26 21:16:39,627 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-26 21:16:39,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-26 21:16:39,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75. [2018-09-26 21:16:39,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-26 21:16:39,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2018-09-26 21:16:39,636 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 68 [2018-09-26 21:16:39,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:39,636 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2018-09-26 21:16:39,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-26 21:16:39,636 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2018-09-26 21:16:39,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-26 21:16:39,637 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:39,637 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 1, 1, 1, 1, 1] [2018-09-26 21:16:39,637 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:39,637 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:39,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1190013460, now seen corresponding path program 25 times [2018-09-26 21:16:39,638 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:39,638 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:39,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:39,638 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:16:39,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:39,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:40,217 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 364 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:40,218 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:40,218 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:16:40,225 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:16:40,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:40,267 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:40,286 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 364 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:40,309 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:40,310 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-26 21:16:40,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-26 21:16:40,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-26 21:16:40,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2018-09-26 21:16:40,311 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 30 states. [2018-09-26 21:16:41,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:41,043 INFO L93 Difference]: Finished difference Result 139 states and 143 transitions. [2018-09-26 21:16:41,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-26 21:16:41,043 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 72 [2018-09-26 21:16:41,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:41,043 INFO L225 Difference]: With dead ends: 139 [2018-09-26 21:16:41,044 INFO L226 Difference]: Without dead ends: 76 [2018-09-26 21:16:41,044 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=477, Invalid=1415, Unknown=0, NotChecked=0, Total=1892 [2018-09-26 21:16:41,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-09-26 21:16:41,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-09-26 21:16:41,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-26 21:16:41,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2018-09-26 21:16:41,052 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 72 [2018-09-26 21:16:41,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:41,053 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2018-09-26 21:16:41,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-26 21:16:41,053 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2018-09-26 21:16:41,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-09-26 21:16:41,054 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:41,054 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 1, 1, 1, 1, 1] [2018-09-26 21:16:41,054 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:41,054 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:41,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1746112411, now seen corresponding path program 26 times [2018-09-26 21:16:41,054 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:41,055 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:41,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:41,055 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:16:41,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:41,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:41,977 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 131 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:41,978 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:41,978 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 [2018-09-26 21:16:41,985 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:16:42,022 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:16:42,022 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:16:42,024 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:42,034 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 131 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:42,054 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:42,054 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-26 21:16:42,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-26 21:16:42,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-26 21:16:42,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-26 21:16:42,055 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 17 states. [2018-09-26 21:16:42,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:42,138 INFO L93 Difference]: Finished difference Result 90 states and 93 transitions. [2018-09-26 21:16:42,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-26 21:16:42,138 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 73 [2018-09-26 21:16:42,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:42,140 INFO L225 Difference]: With dead ends: 90 [2018-09-26 21:16:42,140 INFO L226 Difference]: Without dead ends: 84 [2018-09-26 21:16:42,141 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-26 21:16:42,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-09-26 21:16:42,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2018-09-26 21:16:42,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-26 21:16:42,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2018-09-26 21:16:42,148 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 73 [2018-09-26 21:16:42,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:42,149 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2018-09-26 21:16:42,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-26 21:16:42,149 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2018-09-26 21:16:42,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-09-26 21:16:42,149 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:42,150 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 1, 1, 1, 1, 1] [2018-09-26 21:16:42,150 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:42,150 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:42,150 INFO L82 PathProgramCache]: Analyzing trace with hash 613460315, now seen corresponding path program 27 times [2018-09-26 21:16:42,150 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:42,150 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:42,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:42,151 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:16:42,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:42,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:42,589 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 420 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:42,589 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:42,590 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 [2018-09-26 21:16:42,598 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:16:42,646 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-26 21:16:42,646 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:16:42,649 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:42,660 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 420 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:42,680 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:42,680 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-26 21:16:42,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-26 21:16:42,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-26 21:16:42,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=721, Unknown=0, NotChecked=0, Total=992 [2018-09-26 21:16:42,681 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 32 states. [2018-09-26 21:16:43,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:43,491 INFO L93 Difference]: Finished difference Result 148 states and 152 transitions. [2018-09-26 21:16:43,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-26 21:16:43,491 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 77 [2018-09-26 21:16:43,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:43,492 INFO L225 Difference]: With dead ends: 148 [2018-09-26 21:16:43,492 INFO L226 Difference]: Without dead ends: 81 [2018-09-26 21:16:43,493 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=541, Invalid=1621, Unknown=0, NotChecked=0, Total=2162 [2018-09-26 21:16:43,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-26 21:16:43,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-26 21:16:43,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-26 21:16:43,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2018-09-26 21:16:43,499 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 77 [2018-09-26 21:16:43,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:43,500 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2018-09-26 21:16:43,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-26 21:16:43,500 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2018-09-26 21:16:43,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-26 21:16:43,500 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:43,500 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 1, 1, 1, 1, 1] [2018-09-26 21:16:43,500 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:43,501 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:43,501 INFO L82 PathProgramCache]: Analyzing trace with hash 381727362, now seen corresponding path program 28 times [2018-09-26 21:16:43,501 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:43,501 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:43,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:43,502 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:16:43,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:43,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:43,746 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 148 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:43,746 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:43,746 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 [2018-09-26 21:16:43,755 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:16:43,795 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:16:43,795 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:16:43,798 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:43,809 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 148 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:43,830 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:43,830 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-26 21:16:43,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-26 21:16:43,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-26 21:16:43,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-26 21:16:43,831 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 18 states. [2018-09-26 21:16:43,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:43,915 INFO L93 Difference]: Finished difference Result 95 states and 98 transitions. [2018-09-26 21:16:43,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-26 21:16:43,915 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 78 [2018-09-26 21:16:43,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:43,916 INFO L225 Difference]: With dead ends: 95 [2018-09-26 21:16:43,916 INFO L226 Difference]: Without dead ends: 89 [2018-09-26 21:16:43,917 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-26 21:16:43,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-26 21:16:43,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 85. [2018-09-26 21:16:43,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-26 21:16:43,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2018-09-26 21:16:43,925 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 78 [2018-09-26 21:16:43,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:43,926 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2018-09-26 21:16:43,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-26 21:16:43,926 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2018-09-26 21:16:43,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-26 21:16:43,926 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:43,926 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 1, 1, 1, 1, 1] [2018-09-26 21:16:43,927 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:43,927 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:43,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1123248904, now seen corresponding path program 29 times [2018-09-26 21:16:43,927 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:43,927 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:43,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:43,928 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:16:43,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:43,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:44,615 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 480 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:44,615 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:44,615 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:16:44,623 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:16:44,855 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-26 21:16:44,855 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:16:44,858 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:44,874 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 480 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:44,905 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:44,905 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-26 21:16:44,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-26 21:16:44,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-26 21:16:44,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2018-09-26 21:16:44,907 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 34 states. [2018-09-26 21:16:45,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:45,866 INFO L93 Difference]: Finished difference Result 157 states and 161 transitions. [2018-09-26 21:16:45,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-26 21:16:45,866 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 82 [2018-09-26 21:16:45,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:45,867 INFO L225 Difference]: With dead ends: 157 [2018-09-26 21:16:45,867 INFO L226 Difference]: Without dead ends: 86 [2018-09-26 21:16:45,868 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=609, Invalid=1841, Unknown=0, NotChecked=0, Total=2450 [2018-09-26 21:16:45,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-09-26 21:16:45,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-09-26 21:16:45,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-09-26 21:16:45,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2018-09-26 21:16:45,880 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 82 [2018-09-26 21:16:45,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:45,880 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2018-09-26 21:16:45,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-26 21:16:45,880 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2018-09-26 21:16:45,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-26 21:16:45,881 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:45,881 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 1, 1, 1, 1, 1] [2018-09-26 21:16:45,881 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:45,881 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:45,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1191652401, now seen corresponding path program 30 times [2018-09-26 21:16:45,882 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:45,882 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:45,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:45,883 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:16:45,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:45,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:46,283 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 166 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:46,283 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:46,283 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 [2018-09-26 21:16:46,291 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:16:46,343 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-26 21:16:46,344 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:16:46,348 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:46,378 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 166 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:46,403 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:46,403 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-26 21:16:46,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-26 21:16:46,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-26 21:16:46,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-26 21:16:46,404 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 19 states. [2018-09-26 21:16:46,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:46,503 INFO L93 Difference]: Finished difference Result 100 states and 103 transitions. [2018-09-26 21:16:46,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-26 21:16:46,504 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 83 [2018-09-26 21:16:46,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:46,504 INFO L225 Difference]: With dead ends: 100 [2018-09-26 21:16:46,504 INFO L226 Difference]: Without dead ends: 94 [2018-09-26 21:16:46,505 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-26 21:16:46,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-09-26 21:16:46,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2018-09-26 21:16:46,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-09-26 21:16:46,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2018-09-26 21:16:46,513 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 83 [2018-09-26 21:16:46,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:46,513 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2018-09-26 21:16:46,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-26 21:16:46,513 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2018-09-26 21:16:46,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-09-26 21:16:46,514 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:46,514 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 1, 1, 1, 1, 1] [2018-09-26 21:16:46,514 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:46,514 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:46,514 INFO L82 PathProgramCache]: Analyzing trace with hash 219193127, now seen corresponding path program 31 times [2018-09-26 21:16:46,514 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:46,514 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:46,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:46,515 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:16:46,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:46,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:47,927 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 544 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:47,927 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:47,927 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:16:47,935 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:16:47,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:47,981 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:47,997 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 544 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:48,020 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:48,020 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-26 21:16:48,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-26 21:16:48,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-26 21:16:48,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=919, Unknown=0, NotChecked=0, Total=1260 [2018-09-26 21:16:48,022 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 36 states. [2018-09-26 21:16:48,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:48,667 INFO L93 Difference]: Finished difference Result 166 states and 170 transitions. [2018-09-26 21:16:48,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-26 21:16:48,667 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 87 [2018-09-26 21:16:48,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:48,668 INFO L225 Difference]: With dead ends: 166 [2018-09-26 21:16:48,668 INFO L226 Difference]: Without dead ends: 91 [2018-09-26 21:16:48,669 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=681, Invalid=2075, Unknown=0, NotChecked=0, Total=2756 [2018-09-26 21:16:48,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-26 21:16:48,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-26 21:16:48,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-26 21:16:48,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2018-09-26 21:16:48,677 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 87 [2018-09-26 21:16:48,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:48,677 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2018-09-26 21:16:48,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-26 21:16:48,678 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2018-09-26 21:16:48,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-26 21:16:48,678 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:48,678 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 1, 1, 1, 1, 1] [2018-09-26 21:16:48,678 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:48,678 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:48,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1134517362, now seen corresponding path program 32 times [2018-09-26 21:16:48,679 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:48,679 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:48,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:48,679 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:16:48,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:48,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:48,955 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 185 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:48,956 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:48,956 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 [2018-09-26 21:16:48,962 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:16:49,008 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:16:49,008 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:16:49,010 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:49,026 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 185 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:49,047 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:49,047 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-26 21:16:49,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-26 21:16:49,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-26 21:16:49,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-26 21:16:49,048 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand 20 states. [2018-09-26 21:16:49,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:49,153 INFO L93 Difference]: Finished difference Result 105 states and 108 transitions. [2018-09-26 21:16:49,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-26 21:16:49,154 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 88 [2018-09-26 21:16:49,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:49,154 INFO L225 Difference]: With dead ends: 105 [2018-09-26 21:16:49,154 INFO L226 Difference]: Without dead ends: 99 [2018-09-26 21:16:49,155 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-26 21:16:49,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-26 21:16:49,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2018-09-26 21:16:49,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-26 21:16:49,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2018-09-26 21:16:49,164 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 88 [2018-09-26 21:16:49,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:49,165 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2018-09-26 21:16:49,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-26 21:16:49,165 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2018-09-26 21:16:49,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-26 21:16:49,165 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:49,165 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 1, 1, 1, 1, 1] [2018-09-26 21:16:49,166 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:49,166 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:49,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1074454524, now seen corresponding path program 33 times [2018-09-26 21:16:49,166 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:49,166 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:49,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:49,167 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:16:49,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:49,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:49,647 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 612 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:49,647 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:49,647 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 [2018-09-26 21:16:49,655 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:16:49,718 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-26 21:16:49,719 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:16:49,722 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:49,735 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 612 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:49,756 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:49,756 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-26 21:16:49,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-26 21:16:49,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-26 21:16:49,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=1027, Unknown=0, NotChecked=0, Total=1406 [2018-09-26 21:16:49,757 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand 38 states. [2018-09-26 21:16:51,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:51,714 INFO L93 Difference]: Finished difference Result 175 states and 179 transitions. [2018-09-26 21:16:51,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-26 21:16:51,715 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 92 [2018-09-26 21:16:51,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:51,716 INFO L225 Difference]: With dead ends: 175 [2018-09-26 21:16:51,716 INFO L226 Difference]: Without dead ends: 96 [2018-09-26 21:16:51,717 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=757, Invalid=2323, Unknown=0, NotChecked=0, Total=3080 [2018-09-26 21:16:51,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-09-26 21:16:51,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-09-26 21:16:51,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-09-26 21:16:51,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2018-09-26 21:16:51,724 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 92 [2018-09-26 21:16:51,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:51,724 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2018-09-26 21:16:51,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-26 21:16:51,724 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2018-09-26 21:16:51,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-09-26 21:16:51,725 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:51,725 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 1, 1, 1, 1, 1] [2018-09-26 21:16:51,725 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:51,725 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:51,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1513438211, now seen corresponding path program 34 times [2018-09-26 21:16:51,726 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:51,726 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:51,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:51,726 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:16:51,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:51,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:52,278 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 205 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:52,279 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:52,279 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 [2018-09-26 21:16:52,286 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:16:52,328 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:16:52,328 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:16:52,331 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:52,351 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 205 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:52,371 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:52,371 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-26 21:16:52,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-26 21:16:52,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-26 21:16:52,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-26 21:16:52,372 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand 21 states. [2018-09-26 21:16:52,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:52,501 INFO L93 Difference]: Finished difference Result 110 states and 113 transitions. [2018-09-26 21:16:52,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-26 21:16:52,501 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 93 [2018-09-26 21:16:52,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:52,502 INFO L225 Difference]: With dead ends: 110 [2018-09-26 21:16:52,502 INFO L226 Difference]: Without dead ends: 104 [2018-09-26 21:16:52,502 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-26 21:16:52,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-09-26 21:16:52,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2018-09-26 21:16:52,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-26 21:16:52,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2018-09-26 21:16:52,512 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 93 [2018-09-26 21:16:52,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:52,512 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2018-09-26 21:16:52,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-26 21:16:52,513 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2018-09-26 21:16:52,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-09-26 21:16:52,513 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:52,513 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 1, 1, 1, 1, 1] [2018-09-26 21:16:52,513 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:52,514 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:52,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1385467661, now seen corresponding path program 35 times [2018-09-26 21:16:52,514 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:52,514 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:52,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:52,515 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:16:52,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:52,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:53,199 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 684 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:53,200 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:53,200 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:16:53,207 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:16:53,269 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-26 21:16:53,269 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:16:53,272 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:53,288 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 684 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:53,310 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:53,310 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-26 21:16:53,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-26 21:16:53,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-26 21:16:53,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1141, Unknown=0, NotChecked=0, Total=1560 [2018-09-26 21:16:53,312 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand 40 states. [2018-09-26 21:16:53,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:53,987 INFO L93 Difference]: Finished difference Result 184 states and 188 transitions. [2018-09-26 21:16:53,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-26 21:16:53,988 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 97 [2018-09-26 21:16:53,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:53,988 INFO L225 Difference]: With dead ends: 184 [2018-09-26 21:16:53,988 INFO L226 Difference]: Without dead ends: 101 [2018-09-26 21:16:53,989 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=837, Invalid=2585, Unknown=0, NotChecked=0, Total=3422 [2018-09-26 21:16:53,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-26 21:16:53,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-26 21:16:53,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-26 21:16:53,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2018-09-26 21:16:53,997 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 97 [2018-09-26 21:16:53,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:53,997 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2018-09-26 21:16:53,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-26 21:16:53,997 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2018-09-26 21:16:53,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-26 21:16:53,998 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:53,998 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 1, 1, 1, 1, 1] [2018-09-26 21:16:53,998 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:53,998 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:53,998 INFO L82 PathProgramCache]: Analyzing trace with hash -209035110, now seen corresponding path program 36 times [2018-09-26 21:16:53,998 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:53,999 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:53,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:53,999 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:16:53,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:54,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:54,395 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 226 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:54,395 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:54,395 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 [2018-09-26 21:16:54,403 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:16:54,461 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-26 21:16:54,462 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:16:54,466 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:54,484 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 226 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:54,515 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:54,515 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-26 21:16:54,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-26 21:16:54,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-26 21:16:54,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-26 21:16:54,516 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand 22 states. [2018-09-26 21:16:55,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:55,026 INFO L93 Difference]: Finished difference Result 115 states and 118 transitions. [2018-09-26 21:16:55,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-26 21:16:55,027 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 98 [2018-09-26 21:16:55,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:55,028 INFO L225 Difference]: With dead ends: 115 [2018-09-26 21:16:55,028 INFO L226 Difference]: Without dead ends: 109 [2018-09-26 21:16:55,029 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-26 21:16:55,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-26 21:16:55,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 105. [2018-09-26 21:16:55,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-26 21:16:55,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2018-09-26 21:16:55,038 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 98 [2018-09-26 21:16:55,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:55,038 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2018-09-26 21:16:55,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-26 21:16:55,039 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2018-09-26 21:16:55,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-26 21:16:55,039 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:55,039 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 1, 1, 1, 1, 1] [2018-09-26 21:16:55,039 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:55,040 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:55,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1566476528, now seen corresponding path program 37 times [2018-09-26 21:16:55,040 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:55,040 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:55,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:55,041 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:16:55,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:55,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:56,276 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 760 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:56,277 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:56,277 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:16:56,284 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:16:56,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:56,328 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:56,348 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 760 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:56,377 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:56,377 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-26 21:16:56,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-26 21:16:56,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-26 21:16:56,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=1261, Unknown=0, NotChecked=0, Total=1722 [2018-09-26 21:16:56,379 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand 42 states. [2018-09-26 21:16:58,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:58,029 INFO L93 Difference]: Finished difference Result 193 states and 197 transitions. [2018-09-26 21:16:58,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-26 21:16:58,029 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 102 [2018-09-26 21:16:58,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:58,030 INFO L225 Difference]: With dead ends: 193 [2018-09-26 21:16:58,030 INFO L226 Difference]: Without dead ends: 106 [2018-09-26 21:16:58,031 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=921, Invalid=2861, Unknown=0, NotChecked=0, Total=3782 [2018-09-26 21:16:58,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-09-26 21:16:58,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-09-26 21:16:58,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-09-26 21:16:58,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2018-09-26 21:16:58,043 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 102 [2018-09-26 21:16:58,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:58,043 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2018-09-26 21:16:58,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-26 21:16:58,043 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2018-09-26 21:16:58,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-09-26 21:16:58,044 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:58,044 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 1, 1, 1, 1, 1] [2018-09-26 21:16:58,044 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:58,045 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:58,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1920546761, now seen corresponding path program 38 times [2018-09-26 21:16:58,045 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:58,045 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:58,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:58,046 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:16:58,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:58,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:58,885 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 248 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:58,886 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:58,886 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 [2018-09-26 21:16:58,895 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:16:58,961 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:16:58,962 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:16:58,965 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:58,985 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 248 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:59,016 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:59,016 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-26 21:16:59,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-26 21:16:59,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-26 21:16:59,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-26 21:16:59,017 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 23 states. [2018-09-26 21:16:59,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:59,223 INFO L93 Difference]: Finished difference Result 120 states and 123 transitions. [2018-09-26 21:16:59,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-26 21:16:59,223 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 103 [2018-09-26 21:16:59,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:59,225 INFO L225 Difference]: With dead ends: 120 [2018-09-26 21:16:59,225 INFO L226 Difference]: Without dead ends: 114 [2018-09-26 21:16:59,226 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-26 21:16:59,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-09-26 21:16:59,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 110. [2018-09-26 21:16:59,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-09-26 21:16:59,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2018-09-26 21:16:59,240 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 103 [2018-09-26 21:16:59,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:59,241 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2018-09-26 21:16:59,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-26 21:16:59,241 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2018-09-26 21:16:59,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-09-26 21:16:59,242 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:59,242 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 1, 1, 1, 1, 1] [2018-09-26 21:16:59,242 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:59,242 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:59,243 INFO L82 PathProgramCache]: Analyzing trace with hash -756867393, now seen corresponding path program 39 times [2018-09-26 21:16:59,243 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:59,243 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:59,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:59,244 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:16:59,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:59,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:01,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1050 backedges. 840 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:17:01,100 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:01,100 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:17:01,113 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:17:01,188 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-26 21:17:01,189 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:01,192 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:01,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1050 backedges. 840 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:17:01,245 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:01,245 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-26 21:17:01,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-26 21:17:01,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-26 21:17:01,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=505, Invalid=1387, Unknown=0, NotChecked=0, Total=1892 [2018-09-26 21:17:01,247 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 44 states. [2018-09-26 21:17:03,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:03,317 INFO L93 Difference]: Finished difference Result 202 states and 206 transitions. [2018-09-26 21:17:03,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-26 21:17:03,318 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 107 [2018-09-26 21:17:03,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:03,319 INFO L225 Difference]: With dead ends: 202 [2018-09-26 21:17:03,319 INFO L226 Difference]: Without dead ends: 111 [2018-09-26 21:17:03,320 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1009, Invalid=3151, Unknown=0, NotChecked=0, Total=4160 [2018-09-26 21:17:03,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-26 21:17:03,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-09-26 21:17:03,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-26 21:17:03,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2018-09-26 21:17:03,330 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 107 [2018-09-26 21:17:03,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:03,330 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2018-09-26 21:17:03,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-26 21:17:03,331 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2018-09-26 21:17:03,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-26 21:17:03,331 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:03,331 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 1, 1, 1, 1, 1] [2018-09-26 21:17:03,331 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:03,332 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:03,332 INFO L82 PathProgramCache]: Analyzing trace with hash 798222758, now seen corresponding path program 40 times [2018-09-26 21:17:03,332 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:03,332 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:03,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:03,332 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:03,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:03,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:03,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 271 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:17:03,713 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:03,713 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 [2018-09-26 21:17:03,721 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:17:03,769 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:17:03,769 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:03,772 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:03,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 271 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:17:03,810 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:03,810 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-26 21:17:03,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-26 21:17:03,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-26 21:17:03,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-26 21:17:03,811 INFO L87 Difference]: Start difference. First operand 111 states and 113 transitions. Second operand 24 states. [2018-09-26 21:17:03,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:03,933 INFO L93 Difference]: Finished difference Result 125 states and 128 transitions. [2018-09-26 21:17:03,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-26 21:17:03,933 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 108 [2018-09-26 21:17:03,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:03,934 INFO L225 Difference]: With dead ends: 125 [2018-09-26 21:17:03,935 INFO L226 Difference]: Without dead ends: 119 [2018-09-26 21:17:03,935 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-26 21:17:03,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-26 21:17:03,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2018-09-26 21:17:03,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-26 21:17:03,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2018-09-26 21:17:03,950 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 108 [2018-09-26 21:17:03,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:03,950 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2018-09-26 21:17:03,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-26 21:17:03,950 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2018-09-26 21:17:03,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-26 21:17:03,951 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:03,951 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 1, 1, 1, 1, 1] [2018-09-26 21:17:03,951 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:03,951 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:03,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1030199836, now seen corresponding path program 41 times [2018-09-26 21:17:03,952 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:03,952 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:03,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:03,953 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:03,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:03,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:05,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 924 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:17:05,065 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:05,065 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:17:05,072 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:17:05,140 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-26 21:17:05,141 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:05,144 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:05,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 924 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:17:05,185 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:05,186 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-26 21:17:05,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-26 21:17:05,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-26 21:17:05,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=551, Invalid=1519, Unknown=0, NotChecked=0, Total=2070 [2018-09-26 21:17:05,187 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand 46 states. [2018-09-26 21:17:06,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:06,205 INFO L93 Difference]: Finished difference Result 211 states and 215 transitions. [2018-09-26 21:17:06,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-26 21:17:06,206 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 112 [2018-09-26 21:17:06,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:06,206 INFO L225 Difference]: With dead ends: 211 [2018-09-26 21:17:06,206 INFO L226 Difference]: Without dead ends: 116 [2018-09-26 21:17:06,208 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1101, Invalid=3455, Unknown=0, NotChecked=0, Total=4556 [2018-09-26 21:17:06,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-09-26 21:17:06,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-09-26 21:17:06,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-09-26 21:17:06,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 118 transitions. [2018-09-26 21:17:06,220 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 118 transitions. Word has length 112 [2018-09-26 21:17:06,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:06,220 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 118 transitions. [2018-09-26 21:17:06,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-26 21:17:06,220 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 118 transitions. [2018-09-26 21:17:06,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-09-26 21:17:06,221 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:06,221 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 22, 21, 21, 1, 1, 1, 1, 1] [2018-09-26 21:17:06,221 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:06,222 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:06,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1949005931, now seen corresponding path program 42 times [2018-09-26 21:17:06,222 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:06,222 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:06,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:06,223 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:06,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:06,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:06,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 295 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:17:06,903 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:06,903 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 [2018-09-26 21:17:06,927 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:17:07,024 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-09-26 21:17:07,024 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:07,027 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:07,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 295 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:17:07,063 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:07,064 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-26 21:17:07,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-26 21:17:07,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-26 21:17:07,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-26 21:17:07,065 INFO L87 Difference]: Start difference. First operand 116 states and 118 transitions. Second operand 25 states. [2018-09-26 21:17:07,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:07,287 INFO L93 Difference]: Finished difference Result 130 states and 133 transitions. [2018-09-26 21:17:07,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-26 21:17:07,288 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 113 [2018-09-26 21:17:07,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:07,289 INFO L225 Difference]: With dead ends: 130 [2018-09-26 21:17:07,289 INFO L226 Difference]: Without dead ends: 124 [2018-09-26 21:17:07,289 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-26 21:17:07,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-09-26 21:17:07,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 120. [2018-09-26 21:17:07,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-09-26 21:17:07,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2018-09-26 21:17:07,301 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 113 [2018-09-26 21:17:07,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:07,301 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2018-09-26 21:17:07,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-26 21:17:07,302 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2018-09-26 21:17:07,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-09-26 21:17:07,302 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:07,302 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 1, 1, 1, 1, 1] [2018-09-26 21:17:07,302 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:07,302 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:07,303 INFO L82 PathProgramCache]: Analyzing trace with hash 725198987, now seen corresponding path program 43 times [2018-09-26 21:17:07,303 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:07,303 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:07,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:07,303 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:07,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:07,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:09,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1265 backedges. 1012 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:17:09,803 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:09,803 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:17:09,811 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:17:09,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:09,866 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:09,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1265 backedges. 1012 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:17:09,908 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:09,909 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-26 21:17:09,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-26 21:17:09,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-26 21:17:09,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=1657, Unknown=0, NotChecked=0, Total=2256 [2018-09-26 21:17:09,910 INFO L87 Difference]: Start difference. First operand 120 states and 122 transitions. Second operand 48 states. [2018-09-26 21:17:11,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:11,047 INFO L93 Difference]: Finished difference Result 220 states and 224 transitions. [2018-09-26 21:17:11,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-26 21:17:11,047 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 117 [2018-09-26 21:17:11,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:11,048 INFO L225 Difference]: With dead ends: 220 [2018-09-26 21:17:11,048 INFO L226 Difference]: Without dead ends: 121 [2018-09-26 21:17:11,049 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1197, Invalid=3773, Unknown=0, NotChecked=0, Total=4970 [2018-09-26 21:17:11,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-09-26 21:17:11,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-09-26 21:17:11,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-09-26 21:17:11,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 123 transitions. [2018-09-26 21:17:11,058 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 123 transitions. Word has length 117 [2018-09-26 21:17:11,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:11,059 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 123 transitions. [2018-09-26 21:17:11,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-26 21:17:11,059 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 123 transitions. [2018-09-26 21:17:11,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-26 21:17:11,060 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:11,060 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 22, 1, 1, 1, 1, 1] [2018-09-26 21:17:11,060 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:11,060 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:11,060 INFO L82 PathProgramCache]: Analyzing trace with hash 995311282, now seen corresponding path program 44 times [2018-09-26 21:17:11,060 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:11,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:11,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:11,061 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:17:11,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:11,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:11,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 320 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:17:11,559 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:11,559 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 [2018-09-26 21:17:11,566 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:17:11,618 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:17:11,618 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:11,621 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:11,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 320 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:17:11,665 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:11,666 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-26 21:17:11,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-26 21:17:11,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-26 21:17:11,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-26 21:17:11,667 INFO L87 Difference]: Start difference. First operand 121 states and 123 transitions. Second operand 26 states. [2018-09-26 21:17:11,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:11,805 INFO L93 Difference]: Finished difference Result 135 states and 138 transitions. [2018-09-26 21:17:11,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-26 21:17:11,805 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 118 [2018-09-26 21:17:11,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:11,807 INFO L225 Difference]: With dead ends: 135 [2018-09-26 21:17:11,807 INFO L226 Difference]: Without dead ends: 129 [2018-09-26 21:17:11,807 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-26 21:17:11,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-09-26 21:17:11,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 125. [2018-09-26 21:17:11,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-09-26 21:17:11,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 127 transitions. [2018-09-26 21:17:11,822 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 127 transitions. Word has length 118 [2018-09-26 21:17:11,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:11,822 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 127 transitions. [2018-09-26 21:17:11,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-26 21:17:11,822 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 127 transitions. [2018-09-26 21:17:11,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-26 21:17:11,823 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:11,823 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 1, 1, 1, 1, 1] [2018-09-26 21:17:11,823 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:11,823 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:11,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1935656, now seen corresponding path program 45 times [2018-09-26 21:17:11,824 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:11,824 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:11,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:11,825 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:11,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:11,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:13,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1380 backedges. 1104 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:17:13,395 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:13,395 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 [2018-09-26 21:17:13,404 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:17:13,492 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-26 21:17:13,492 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:13,495 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:13,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1380 backedges. 1104 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:17:13,551 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:13,552 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-26 21:17:13,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-26 21:17:13,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-26 21:17:13,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=649, Invalid=1801, Unknown=0, NotChecked=0, Total=2450 [2018-09-26 21:17:13,553 INFO L87 Difference]: Start difference. First operand 125 states and 127 transitions. Second operand 50 states. [2018-09-26 21:17:14,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:14,931 INFO L93 Difference]: Finished difference Result 229 states and 233 transitions. [2018-09-26 21:17:14,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-26 21:17:14,931 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 122 [2018-09-26 21:17:14,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:14,932 INFO L225 Difference]: With dead ends: 229 [2018-09-26 21:17:14,933 INFO L226 Difference]: Without dead ends: 126 [2018-09-26 21:17:14,933 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1297, Invalid=4105, Unknown=0, NotChecked=0, Total=5402 [2018-09-26 21:17:14,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-09-26 21:17:14,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2018-09-26 21:17:14,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-09-26 21:17:14,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 128 transitions. [2018-09-26 21:17:14,946 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 128 transitions. Word has length 122 [2018-09-26 21:17:14,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:14,946 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 128 transitions. [2018-09-26 21:17:14,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-26 21:17:14,946 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 128 transitions. [2018-09-26 21:17:14,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-09-26 21:17:14,947 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:14,947 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 24, 23, 23, 1, 1, 1, 1, 1] [2018-09-26 21:17:14,947 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:14,948 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:14,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1360966497, now seen corresponding path program 46 times [2018-09-26 21:17:14,948 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:14,948 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:14,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:14,949 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:14,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:14,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:15,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 346 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:17:15,346 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:15,346 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:17:15,356 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:17:15,416 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:17:15,416 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:15,420 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:15,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 346 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:17:15,467 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:15,467 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-26 21:17:15,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-26 21:17:15,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-26 21:17:15,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-26 21:17:15,468 INFO L87 Difference]: Start difference. First operand 126 states and 128 transitions. Second operand 27 states. [2018-09-26 21:17:15,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:15,607 INFO L93 Difference]: Finished difference Result 140 states and 143 transitions. [2018-09-26 21:17:15,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-26 21:17:15,608 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 123 [2018-09-26 21:17:15,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:15,608 INFO L225 Difference]: With dead ends: 140 [2018-09-26 21:17:15,609 INFO L226 Difference]: Without dead ends: 134 [2018-09-26 21:17:15,609 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-26 21:17:15,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-09-26 21:17:15,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 130. [2018-09-26 21:17:15,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-09-26 21:17:15,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 132 transitions. [2018-09-26 21:17:15,620 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 132 transitions. Word has length 123 [2018-09-26 21:17:15,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:15,620 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 132 transitions. [2018-09-26 21:17:15,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-26 21:17:15,620 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 132 transitions. [2018-09-26 21:17:15,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-09-26 21:17:15,620 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:15,620 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 1, 1, 1, 1, 1] [2018-09-26 21:17:15,621 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:15,621 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:15,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1531900329, now seen corresponding path program 47 times [2018-09-26 21:17:15,621 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:15,621 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:15,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:15,622 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:15,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:15,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:16,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1500 backedges. 1200 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:17:16,586 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:16,586 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 [2018-09-26 21:17:16,593 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:17:16,731 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-26 21:17:16,731 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:16,734 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:16,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1500 backedges. 1200 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:17:16,774 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:16,775 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-26 21:17:16,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-26 21:17:16,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-26 21:17:16,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=701, Invalid=1951, Unknown=0, NotChecked=0, Total=2652 [2018-09-26 21:17:16,776 INFO L87 Difference]: Start difference. First operand 130 states and 132 transitions. Second operand 52 states. [2018-09-26 21:17:18,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:18,326 INFO L93 Difference]: Finished difference Result 238 states and 242 transitions. [2018-09-26 21:17:18,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-26 21:17:18,326 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 127 [2018-09-26 21:17:18,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:18,327 INFO L225 Difference]: With dead ends: 238 [2018-09-26 21:17:18,327 INFO L226 Difference]: Without dead ends: 131 [2018-09-26 21:17:18,329 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1401, Invalid=4451, Unknown=0, NotChecked=0, Total=5852 [2018-09-26 21:17:18,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-26 21:17:18,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-09-26 21:17:18,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-26 21:17:18,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 133 transitions. [2018-09-26 21:17:18,339 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 133 transitions. Word has length 127 [2018-09-26 21:17:18,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:18,339 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 133 transitions. [2018-09-26 21:17:18,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-26 21:17:18,339 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 133 transitions. [2018-09-26 21:17:18,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-26 21:17:18,340 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:18,340 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 25, 24, 24, 1, 1, 1, 1, 1] [2018-09-26 21:17:18,340 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:18,341 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:18,341 INFO L82 PathProgramCache]: Analyzing trace with hash -652320834, now seen corresponding path program 48 times [2018-09-26 21:17:18,341 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:18,341 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:18,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:18,342 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:18,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:18,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:19,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1525 backedges. 373 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:17:19,017 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:19,018 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 [2018-09-26 21:17:19,026 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:17:19,109 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-26 21:17:19,109 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:19,112 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:19,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1525 backedges. 373 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:17:19,172 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:19,172 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-26 21:17:19,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-26 21:17:19,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-26 21:17:19,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-26 21:17:19,173 INFO L87 Difference]: Start difference. First operand 131 states and 133 transitions. Second operand 28 states. [2018-09-26 21:17:19,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:19,401 INFO L93 Difference]: Finished difference Result 145 states and 148 transitions. [2018-09-26 21:17:19,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-26 21:17:19,401 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 128 [2018-09-26 21:17:19,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:19,402 INFO L225 Difference]: With dead ends: 145 [2018-09-26 21:17:19,402 INFO L226 Difference]: Without dead ends: 139 [2018-09-26 21:17:19,402 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-26 21:17:19,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-26 21:17:19,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 135. [2018-09-26 21:17:19,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-09-26 21:17:19,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 137 transitions. [2018-09-26 21:17:19,413 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 137 transitions. Word has length 128 [2018-09-26 21:17:19,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:19,413 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 137 transitions. [2018-09-26 21:17:19,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-26 21:17:19,413 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 137 transitions. [2018-09-26 21:17:19,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-09-26 21:17:19,414 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:19,414 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 1, 1, 1, 1, 1] [2018-09-26 21:17:19,414 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:19,414 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:19,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1843837900, now seen corresponding path program 49 times [2018-09-26 21:17:19,414 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:19,415 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:19,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:19,415 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:19,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:19,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:20,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 1300 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:17:20,404 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:20,404 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 [2018-09-26 21:17:20,413 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:17:20,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:20,480 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:20,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 1300 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:17:20,544 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:20,545 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-26 21:17:20,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-26 21:17:20,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-26 21:17:20,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=755, Invalid=2107, Unknown=0, NotChecked=0, Total=2862 [2018-09-26 21:17:20,546 INFO L87 Difference]: Start difference. First operand 135 states and 137 transitions. Second operand 54 states. [2018-09-26 21:17:22,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:22,084 INFO L93 Difference]: Finished difference Result 247 states and 251 transitions. [2018-09-26 21:17:22,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-26 21:17:22,084 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 132 [2018-09-26 21:17:22,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:22,085 INFO L225 Difference]: With dead ends: 247 [2018-09-26 21:17:22,085 INFO L226 Difference]: Without dead ends: 136 [2018-09-26 21:17:22,086 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1509, Invalid=4811, Unknown=0, NotChecked=0, Total=6320 [2018-09-26 21:17:22,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-09-26 21:17:22,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2018-09-26 21:17:22,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-09-26 21:17:22,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2018-09-26 21:17:22,097 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 132 [2018-09-26 21:17:22,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:22,097 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2018-09-26 21:17:22,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-26 21:17:22,097 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2018-09-26 21:17:22,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-09-26 21:17:22,098 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:22,098 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 26, 25, 25, 1, 1, 1, 1, 1] [2018-09-26 21:17:22,098 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:22,098 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:22,098 INFO L82 PathProgramCache]: Analyzing trace with hash 35240749, now seen corresponding path program 50 times [2018-09-26 21:17:22,099 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:22,099 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:22,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:22,099 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:17:22,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:22,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:23,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 401 proven. 1250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:17:23,055 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:23,055 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 [2018-09-26 21:17:23,068 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:17:23,130 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:17:23,131 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:23,134 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:23,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 401 proven. 1250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:17:23,195 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:23,195 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-26 21:17:23,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-26 21:17:23,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-26 21:17:23,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-26 21:17:23,196 INFO L87 Difference]: Start difference. First operand 136 states and 138 transitions. Second operand 29 states. [2018-09-26 21:17:24,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:24,428 INFO L93 Difference]: Finished difference Result 150 states and 153 transitions. [2018-09-26 21:17:24,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-26 21:17:24,428 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 133 [2018-09-26 21:17:24,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:24,430 INFO L225 Difference]: With dead ends: 150 [2018-09-26 21:17:24,430 INFO L226 Difference]: Without dead ends: 144 [2018-09-26 21:17:24,430 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-26 21:17:24,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-09-26 21:17:24,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 140. [2018-09-26 21:17:24,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-09-26 21:17:24,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 142 transitions. [2018-09-26 21:17:24,447 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 142 transitions. Word has length 133 [2018-09-26 21:17:24,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:24,447 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 142 transitions. [2018-09-26 21:17:24,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-26 21:17:24,447 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 142 transitions. [2018-09-26 21:17:24,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-09-26 21:17:24,448 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:24,448 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 1, 1, 1, 1, 1] [2018-09-26 21:17:24,448 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:24,448 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:24,449 INFO L82 PathProgramCache]: Analyzing trace with hash -838119389, now seen corresponding path program 51 times [2018-09-26 21:17:24,449 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:24,449 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:24,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:24,449 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:24,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:24,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:25,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 1404 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:17:25,849 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:25,849 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 [2018-09-26 21:17:25,856 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:17:25,977 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-09-26 21:17:25,977 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:25,982 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:26,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 1404 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:17:26,028 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:26,028 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-26 21:17:26,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-26 21:17:26,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-26 21:17:26,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=811, Invalid=2269, Unknown=0, NotChecked=0, Total=3080 [2018-09-26 21:17:26,029 INFO L87 Difference]: Start difference. First operand 140 states and 142 transitions. Second operand 56 states. [2018-09-26 21:17:27,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:27,414 INFO L93 Difference]: Finished difference Result 256 states and 260 transitions. [2018-09-26 21:17:27,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-26 21:17:27,414 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 137 [2018-09-26 21:17:27,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:27,415 INFO L225 Difference]: With dead ends: 256 [2018-09-26 21:17:27,415 INFO L226 Difference]: Without dead ends: 141 [2018-09-26 21:17:27,416 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1027 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1621, Invalid=5185, Unknown=0, NotChecked=0, Total=6806 [2018-09-26 21:17:27,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-09-26 21:17:27,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-09-26 21:17:27,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-09-26 21:17:27,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 143 transitions. [2018-09-26 21:17:27,431 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 143 transitions. Word has length 137 [2018-09-26 21:17:27,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:27,432 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 143 transitions. [2018-09-26 21:17:27,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-26 21:17:27,432 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 143 transitions. [2018-09-26 21:17:27,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-26 21:17:27,432 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:27,433 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 27, 26, 26, 1, 1, 1, 1, 1] [2018-09-26 21:17:27,433 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:27,433 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:27,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1657490634, now seen corresponding path program 52 times [2018-09-26 21:17:27,433 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:27,433 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:27,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:27,434 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:27,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:27,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:28,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 430 proven. 1352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:17:28,159 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:28,159 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:17:28,168 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:17:28,228 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:17:28,229 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:28,233 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:28,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 430 proven. 1352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:17:28,282 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:28,282 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-26 21:17:28,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-26 21:17:28,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-26 21:17:28,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-26 21:17:28,283 INFO L87 Difference]: Start difference. First operand 141 states and 143 transitions. Second operand 30 states. [2018-09-26 21:17:28,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:28,447 INFO L93 Difference]: Finished difference Result 155 states and 158 transitions. [2018-09-26 21:17:28,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-26 21:17:28,448 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 138 [2018-09-26 21:17:28,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:28,448 INFO L225 Difference]: With dead ends: 155 [2018-09-26 21:17:28,448 INFO L226 Difference]: Without dead ends: 149 [2018-09-26 21:17:28,449 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-26 21:17:28,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-09-26 21:17:28,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 145. [2018-09-26 21:17:28,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-09-26 21:17:28,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 147 transitions. [2018-09-26 21:17:28,461 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 147 transitions. Word has length 138 [2018-09-26 21:17:28,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:28,461 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 147 transitions. [2018-09-26 21:17:28,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-26 21:17:28,462 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 147 transitions. [2018-09-26 21:17:28,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-09-26 21:17:28,462 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:28,462 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 1, 1, 1, 1, 1] [2018-09-26 21:17:28,463 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:28,463 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:28,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1915800384, now seen corresponding path program 53 times [2018-09-26 21:17:28,463 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:28,463 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:28,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:28,464 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:28,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:28,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:29,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 1512 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:17:29,429 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:29,429 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 [2018-09-26 21:17:29,437 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:17:29,526 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-09-26 21:17:29,526 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:29,529 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:29,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 1512 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:17:29,594 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:29,594 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-26 21:17:29,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-26 21:17:29,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-26 21:17:29,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=869, Invalid=2437, Unknown=0, NotChecked=0, Total=3306 [2018-09-26 21:17:29,595 INFO L87 Difference]: Start difference. First operand 145 states and 147 transitions. Second operand 58 states. [2018-09-26 21:17:31,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:31,331 INFO L93 Difference]: Finished difference Result 265 states and 269 transitions. [2018-09-26 21:17:31,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-26 21:17:31,331 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 142 [2018-09-26 21:17:31,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:31,333 INFO L225 Difference]: With dead ends: 265 [2018-09-26 21:17:31,333 INFO L226 Difference]: Without dead ends: 146 [2018-09-26 21:17:31,334 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1737, Invalid=5573, Unknown=0, NotChecked=0, Total=7310 [2018-09-26 21:17:31,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-09-26 21:17:31,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2018-09-26 21:17:31,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-09-26 21:17:31,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 148 transitions. [2018-09-26 21:17:31,346 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 148 transitions. Word has length 142 [2018-09-26 21:17:31,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:31,346 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 148 transitions. [2018-09-26 21:17:31,346 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-26 21:17:31,346 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 148 transitions. [2018-09-26 21:17:31,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-09-26 21:17:31,347 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:31,347 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 28, 27, 27, 1, 1, 1, 1, 1] [2018-09-26 21:17:31,347 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:31,347 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:31,348 INFO L82 PathProgramCache]: Analyzing trace with hash 520593145, now seen corresponding path program 54 times [2018-09-26 21:17:31,348 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:31,348 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:31,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:31,349 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:31,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:31,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:31,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1918 backedges. 460 proven. 1458 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:17:31,777 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:31,777 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:17:31,786 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:17:31,880 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-09-26 21:17:31,880 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:31,883 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:31,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1918 backedges. 460 proven. 1458 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:17:31,951 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:31,951 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-26 21:17:31,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-26 21:17:31,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-26 21:17:31,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-26 21:17:31,953 INFO L87 Difference]: Start difference. First operand 146 states and 148 transitions. Second operand 31 states. [2018-09-26 21:17:32,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:32,321 INFO L93 Difference]: Finished difference Result 160 states and 163 transitions. [2018-09-26 21:17:32,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-26 21:17:32,322 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 143 [2018-09-26 21:17:32,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:32,323 INFO L225 Difference]: With dead ends: 160 [2018-09-26 21:17:32,323 INFO L226 Difference]: Without dead ends: 154 [2018-09-26 21:17:32,323 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-26 21:17:32,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-09-26 21:17:32,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 150. [2018-09-26 21:17:32,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-09-26 21:17:32,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 152 transitions. [2018-09-26 21:17:32,336 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 152 transitions. Word has length 143 [2018-09-26 21:17:32,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:32,336 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 152 transitions. [2018-09-26 21:17:32,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-26 21:17:32,336 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 152 transitions. [2018-09-26 21:17:32,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-09-26 21:17:32,337 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:32,337 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 28, 1, 1, 1, 1, 1] [2018-09-26 21:17:32,337 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:32,337 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:32,337 INFO L82 PathProgramCache]: Analyzing trace with hash 915041775, now seen corresponding path program 55 times [2018-09-26 21:17:32,337 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:32,337 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:32,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:32,338 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:32,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:32,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:33,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2030 backedges. 1624 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:17:33,932 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:33,932 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:17:33,942 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:17:34,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:34,019 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:34,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2030 backedges. 1624 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:17:34,090 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:34,090 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-26 21:17:34,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-26 21:17:34,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-26 21:17:34,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=929, Invalid=2611, Unknown=0, NotChecked=0, Total=3540 [2018-09-26 21:17:34,091 INFO L87 Difference]: Start difference. First operand 150 states and 152 transitions. Second operand 60 states. [2018-09-26 21:17:36,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:36,369 INFO L93 Difference]: Finished difference Result 274 states and 278 transitions. [2018-09-26 21:17:36,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-26 21:17:36,369 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 147 [2018-09-26 21:17:36,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:36,370 INFO L225 Difference]: With dead ends: 274 [2018-09-26 21:17:36,370 INFO L226 Difference]: Without dead ends: 151 [2018-09-26 21:17:36,371 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1190 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1857, Invalid=5975, Unknown=0, NotChecked=0, Total=7832 [2018-09-26 21:17:36,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-09-26 21:17:36,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-09-26 21:17:36,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-09-26 21:17:36,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 153 transitions. [2018-09-26 21:17:36,384 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 153 transitions. Word has length 147 [2018-09-26 21:17:36,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:36,384 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 153 transitions. [2018-09-26 21:17:36,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-26 21:17:36,384 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 153 transitions. [2018-09-26 21:17:36,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-09-26 21:17:36,385 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:36,385 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 29, 28, 28, 1, 1, 1, 1, 1] [2018-09-26 21:17:36,385 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:36,385 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:36,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1773143510, now seen corresponding path program 56 times [2018-09-26 21:17:36,386 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:36,386 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:36,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:36,386 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:17:36,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:36,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:36,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2059 backedges. 491 proven. 1568 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:17:36,856 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:36,856 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:17:36,885 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:17:36,957 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:17:36,957 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:36,961 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:36,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2059 backedges. 491 proven. 1568 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:17:37,004 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:37,004 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-26 21:17:37,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-26 21:17:37,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-26 21:17:37,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-26 21:17:37,005 INFO L87 Difference]: Start difference. First operand 151 states and 153 transitions. Second operand 32 states. [2018-09-26 21:17:37,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:37,194 INFO L93 Difference]: Finished difference Result 165 states and 168 transitions. [2018-09-26 21:17:37,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-26 21:17:37,194 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 148 [2018-09-26 21:17:37,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:37,195 INFO L225 Difference]: With dead ends: 165 [2018-09-26 21:17:37,195 INFO L226 Difference]: Without dead ends: 159 [2018-09-26 21:17:37,196 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-26 21:17:37,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-09-26 21:17:37,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 155. [2018-09-26 21:17:37,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-09-26 21:17:37,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 157 transitions. [2018-09-26 21:17:37,213 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 157 transitions. Word has length 148 [2018-09-26 21:17:37,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:37,213 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 157 transitions. [2018-09-26 21:17:37,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-26 21:17:37,214 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 157 transitions. [2018-09-26 21:17:37,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-09-26 21:17:37,214 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:37,214 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 29, 1, 1, 1, 1, 1] [2018-09-26 21:17:37,215 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:37,215 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:37,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1766187444, now seen corresponding path program 57 times [2018-09-26 21:17:37,215 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:37,215 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:37,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:37,216 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:37,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:37,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:38,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2175 backedges. 1740 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:17:38,651 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:38,651 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:17:38,659 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:17:38,768 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-09-26 21:17:38,769 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:38,774 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:38,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2175 backedges. 1740 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:17:38,837 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:38,837 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-26 21:17:38,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-26 21:17:38,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-26 21:17:38,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=991, Invalid=2791, Unknown=0, NotChecked=0, Total=3782 [2018-09-26 21:17:38,839 INFO L87 Difference]: Start difference. First operand 155 states and 157 transitions. Second operand 62 states. [2018-09-26 21:17:39,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:39,891 INFO L93 Difference]: Finished difference Result 283 states and 287 transitions. [2018-09-26 21:17:39,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-26 21:17:39,891 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 152 [2018-09-26 21:17:39,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:39,892 INFO L225 Difference]: With dead ends: 283 [2018-09-26 21:17:39,892 INFO L226 Difference]: Without dead ends: 156 [2018-09-26 21:17:39,892 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1981, Invalid=6391, Unknown=0, NotChecked=0, Total=8372 [2018-09-26 21:17:39,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-09-26 21:17:39,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2018-09-26 21:17:39,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-09-26 21:17:39,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 158 transitions. [2018-09-26 21:17:39,905 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 158 transitions. Word has length 152 [2018-09-26 21:17:39,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:39,905 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 158 transitions. [2018-09-26 21:17:39,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-26 21:17:39,905 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 158 transitions. [2018-09-26 21:17:39,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-09-26 21:17:39,906 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:39,906 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 30, 29, 29, 1, 1, 1, 1, 1] [2018-09-26 21:17:39,906 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:39,906 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:39,907 INFO L82 PathProgramCache]: Analyzing trace with hash -928358715, now seen corresponding path program 58 times [2018-09-26 21:17:39,907 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:39,907 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:39,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:39,907 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:39,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:39,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:40,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2205 backedges. 523 proven. 1682 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:17:40,387 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:40,387 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:17:40,396 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:17:40,472 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:17:40,472 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:40,476 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:40,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2205 backedges. 523 proven. 1682 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:17:40,531 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:40,531 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-26 21:17:40,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-26 21:17:40,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-26 21:17:40,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-26 21:17:40,532 INFO L87 Difference]: Start difference. First operand 156 states and 158 transitions. Second operand 33 states. [2018-09-26 21:17:40,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:40,778 INFO L93 Difference]: Finished difference Result 170 states and 173 transitions. [2018-09-26 21:17:40,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-26 21:17:40,779 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 153 [2018-09-26 21:17:40,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:40,779 INFO L225 Difference]: With dead ends: 170 [2018-09-26 21:17:40,779 INFO L226 Difference]: Without dead ends: 164 [2018-09-26 21:17:40,780 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-26 21:17:40,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-09-26 21:17:40,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 160. [2018-09-26 21:17:40,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-09-26 21:17:40,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 162 transitions. [2018-09-26 21:17:40,798 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 162 transitions. Word has length 153 [2018-09-26 21:17:40,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:40,799 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 162 transitions. [2018-09-26 21:17:40,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-26 21:17:40,799 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 162 transitions. [2018-09-26 21:17:40,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-09-26 21:17:40,800 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:40,800 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 30, 1, 1, 1, 1, 1] [2018-09-26 21:17:40,800 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:40,800 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:40,800 INFO L82 PathProgramCache]: Analyzing trace with hash -839882821, now seen corresponding path program 59 times [2018-09-26 21:17:40,800 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:40,801 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:40,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:40,801 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:40,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:40,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:41,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2325 backedges. 1860 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:17:41,982 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:41,982 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:17:41,990 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:17:42,095 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-09-26 21:17:42,095 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:42,099 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:42,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2325 backedges. 1860 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:17:42,157 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:42,157 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-26 21:17:42,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-26 21:17:42,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-26 21:17:42,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1055, Invalid=2977, Unknown=0, NotChecked=0, Total=4032 [2018-09-26 21:17:42,158 INFO L87 Difference]: Start difference. First operand 160 states and 162 transitions. Second operand 64 states. [2018-09-26 21:17:44,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:44,445 INFO L93 Difference]: Finished difference Result 292 states and 296 transitions. [2018-09-26 21:17:44,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-26 21:17:44,445 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 157 [2018-09-26 21:17:44,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:44,446 INFO L225 Difference]: With dead ends: 292 [2018-09-26 21:17:44,446 INFO L226 Difference]: Without dead ends: 161 [2018-09-26 21:17:44,447 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1365 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2109, Invalid=6821, Unknown=0, NotChecked=0, Total=8930 [2018-09-26 21:17:44,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-09-26 21:17:44,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-09-26 21:17:44,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-09-26 21:17:44,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 163 transitions. [2018-09-26 21:17:44,461 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 163 transitions. Word has length 157 [2018-09-26 21:17:44,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:44,462 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 163 transitions. [2018-09-26 21:17:44,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-26 21:17:44,462 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 163 transitions. [2018-09-26 21:17:44,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-09-26 21:17:44,462 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:44,463 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 31, 30, 30, 1, 1, 1, 1, 1] [2018-09-26 21:17:44,463 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:44,463 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:44,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1453492962, now seen corresponding path program 60 times [2018-09-26 21:17:44,463 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:44,463 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:44,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:44,464 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:44,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:44,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:44,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2356 backedges. 556 proven. 1800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:17:44,995 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:44,996 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:17:45,010 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:17:45,246 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-26 21:17:45,246 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:45,249 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:45,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2356 backedges. 556 proven. 1800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:17:45,294 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:45,294 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-26 21:17:45,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-26 21:17:45,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-26 21:17:45,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-26 21:17:45,295 INFO L87 Difference]: Start difference. First operand 161 states and 163 transitions. Second operand 34 states. [2018-09-26 21:17:45,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:45,471 INFO L93 Difference]: Finished difference Result 175 states and 178 transitions. [2018-09-26 21:17:45,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-26 21:17:45,471 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 158 [2018-09-26 21:17:45,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:45,472 INFO L225 Difference]: With dead ends: 175 [2018-09-26 21:17:45,472 INFO L226 Difference]: Without dead ends: 169 [2018-09-26 21:17:45,472 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-26 21:17:45,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-09-26 21:17:45,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 165. [2018-09-26 21:17:45,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-09-26 21:17:45,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 167 transitions. [2018-09-26 21:17:45,491 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 167 transitions. Word has length 158 [2018-09-26 21:17:45,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:45,491 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 167 transitions. [2018-09-26 21:17:45,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-26 21:17:45,492 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 167 transitions. [2018-09-26 21:17:45,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-09-26 21:17:45,492 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:45,492 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 1, 1, 1, 1, 1] [2018-09-26 21:17:45,493 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:45,493 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:45,493 INFO L82 PathProgramCache]: Analyzing trace with hash 227229016, now seen corresponding path program 61 times [2018-09-26 21:17:45,493 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:45,493 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:45,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:45,494 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:45,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:45,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:46,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2480 backedges. 1984 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:17:46,775 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:46,775 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:17:46,783 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:17:46,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:46,860 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:46,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2480 backedges. 1984 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:17:46,907 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:46,907 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-26 21:17:46,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-26 21:17:46,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-26 21:17:46,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1121, Invalid=3169, Unknown=0, NotChecked=0, Total=4290 [2018-09-26 21:17:46,908 INFO L87 Difference]: Start difference. First operand 165 states and 167 transitions. Second operand 66 states. [2018-09-26 21:17:48,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:48,895 INFO L93 Difference]: Finished difference Result 301 states and 305 transitions. [2018-09-26 21:17:48,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-26 21:17:48,896 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 162 [2018-09-26 21:17:48,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:48,896 INFO L225 Difference]: With dead ends: 301 [2018-09-26 21:17:48,896 INFO L226 Difference]: Without dead ends: 166 [2018-09-26 21:17:48,897 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1457 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2241, Invalid=7265, Unknown=0, NotChecked=0, Total=9506 [2018-09-26 21:17:48,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-09-26 21:17:48,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2018-09-26 21:17:48,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-09-26 21:17:48,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 168 transitions. [2018-09-26 21:17:48,916 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 168 transitions. Word has length 162 [2018-09-26 21:17:48,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:48,917 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 168 transitions. [2018-09-26 21:17:48,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-26 21:17:48,917 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 168 transitions. [2018-09-26 21:17:48,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-09-26 21:17:48,918 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:48,918 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 32, 31, 31, 1, 1, 1, 1, 1] [2018-09-26 21:17:48,918 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:48,918 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:48,918 INFO L82 PathProgramCache]: Analyzing trace with hash 541325969, now seen corresponding path program 62 times [2018-09-26 21:17:48,918 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:48,919 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:48,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:48,919 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:17:48,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:48,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:49,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2512 backedges. 590 proven. 1922 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:17:49,450 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:49,450 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:17:49,458 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:17:49,532 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:17:49,533 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:49,536 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:49,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2512 backedges. 590 proven. 1922 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:17:49,586 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:49,586 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-26 21:17:49,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-26 21:17:49,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-26 21:17:49,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-26 21:17:49,587 INFO L87 Difference]: Start difference. First operand 166 states and 168 transitions. Second operand 35 states. [2018-09-26 21:17:49,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:49,826 INFO L93 Difference]: Finished difference Result 180 states and 183 transitions. [2018-09-26 21:17:49,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-26 21:17:49,826 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 163 [2018-09-26 21:17:49,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:49,827 INFO L225 Difference]: With dead ends: 180 [2018-09-26 21:17:49,827 INFO L226 Difference]: Without dead ends: 174 [2018-09-26 21:17:49,827 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-26 21:17:49,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2018-09-26 21:17:49,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 170. [2018-09-26 21:17:49,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2018-09-26 21:17:49,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 172 transitions. [2018-09-26 21:17:49,841 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 172 transitions. Word has length 163 [2018-09-26 21:17:49,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:49,842 INFO L480 AbstractCegarLoop]: Abstraction has 170 states and 172 transitions. [2018-09-26 21:17:49,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-26 21:17:49,842 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 172 transitions. [2018-09-26 21:17:49,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-09-26 21:17:49,842 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:49,843 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 32, 1, 1, 1, 1, 1] [2018-09-26 21:17:49,843 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:49,843 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:49,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1149189511, now seen corresponding path program 63 times [2018-09-26 21:17:49,843 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:49,843 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:49,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:49,844 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:49,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:49,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:51,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2640 backedges. 2112 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:17:51,324 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:51,324 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:17:51,333 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:17:51,456 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-09-26 21:17:51,456 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:51,460 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:51,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2640 backedges. 2112 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:17:51,519 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:51,519 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-26 21:17:51,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-26 21:17:51,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-26 21:17:51,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1189, Invalid=3367, Unknown=0, NotChecked=0, Total=4556 [2018-09-26 21:17:51,520 INFO L87 Difference]: Start difference. First operand 170 states and 172 transitions. Second operand 68 states. [2018-09-26 21:17:53,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:53,995 INFO L93 Difference]: Finished difference Result 310 states and 314 transitions. [2018-09-26 21:17:53,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-26 21:17:53,995 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 167 [2018-09-26 21:17:53,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:53,996 INFO L225 Difference]: With dead ends: 310 [2018-09-26 21:17:53,996 INFO L226 Difference]: Without dead ends: 171 [2018-09-26 21:17:53,997 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1552 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2377, Invalid=7723, Unknown=0, NotChecked=0, Total=10100 [2018-09-26 21:17:53,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-09-26 21:17:54,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-09-26 21:17:54,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-09-26 21:17:54,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 173 transitions. [2018-09-26 21:17:54,014 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 173 transitions. Word has length 167 [2018-09-26 21:17:54,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:54,014 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 173 transitions. [2018-09-26 21:17:54,014 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-26 21:17:54,014 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 173 transitions. [2018-09-26 21:17:54,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-09-26 21:17:54,015 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:54,015 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 33, 32, 32, 1, 1, 1, 1, 1] [2018-09-26 21:17:54,015 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:54,015 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:54,015 INFO L82 PathProgramCache]: Analyzing trace with hash 167304174, now seen corresponding path program 64 times [2018-09-26 21:17:54,015 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:54,015 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:54,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:54,016 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:54,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:54,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:54,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2673 backedges. 625 proven. 2048 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:17:54,579 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:54,579 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-09-26 21:17:54,588 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:17:54,665 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:17:54,665 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:54,670 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:54,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2673 backedges. 625 proven. 2048 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:17:54,720 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:54,721 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-26 21:17:54,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-26 21:17:54,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-26 21:17:54,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-26 21:17:54,722 INFO L87 Difference]: Start difference. First operand 171 states and 173 transitions. Second operand 36 states. [2018-09-26 21:17:54,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:54,919 INFO L93 Difference]: Finished difference Result 185 states and 188 transitions. [2018-09-26 21:17:54,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-26 21:17:54,919 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 168 [2018-09-26 21:17:54,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:54,921 INFO L225 Difference]: With dead ends: 185 [2018-09-26 21:17:54,921 INFO L226 Difference]: Without dead ends: 179 [2018-09-26 21:17:54,921 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-26 21:17:54,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-09-26 21:17:54,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 175. [2018-09-26 21:17:54,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-09-26 21:17:54,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 177 transitions. [2018-09-26 21:17:54,942 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 177 transitions. Word has length 168 [2018-09-26 21:17:54,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:54,942 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 177 transitions. [2018-09-26 21:17:54,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-26 21:17:54,942 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 177 transitions. [2018-09-26 21:17:54,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-09-26 21:17:54,943 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:54,943 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 33, 1, 1, 1, 1, 1] [2018-09-26 21:17:54,943 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:54,943 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:54,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1678104476, now seen corresponding path program 65 times [2018-09-26 21:17:54,944 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:54,944 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:54,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:54,945 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:54,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:54,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:56,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2805 backedges. 2244 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:17:56,334 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:56,334 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:17:56,363 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:17:56,473 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-09-26 21:17:56,473 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:56,477 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:56,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2805 backedges. 2244 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:17:56,555 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:56,555 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-26 21:17:56,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-26 21:17:56,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-26 21:17:56,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1259, Invalid=3571, Unknown=0, NotChecked=0, Total=4830 [2018-09-26 21:17:56,556 INFO L87 Difference]: Start difference. First operand 175 states and 177 transitions. Second operand 70 states. [2018-09-26 21:17:59,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:59,157 INFO L93 Difference]: Finished difference Result 319 states and 323 transitions. [2018-09-26 21:17:59,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-26 21:17:59,157 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 172 [2018-09-26 21:17:59,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:59,158 INFO L225 Difference]: With dead ends: 319 [2018-09-26 21:17:59,158 INFO L226 Difference]: Without dead ends: 176 [2018-09-26 21:17:59,159 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1650 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2517, Invalid=8195, Unknown=0, NotChecked=0, Total=10712 [2018-09-26 21:17:59,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-09-26 21:17:59,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2018-09-26 21:17:59,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2018-09-26 21:17:59,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 178 transitions. [2018-09-26 21:17:59,180 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 178 transitions. Word has length 172 [2018-09-26 21:17:59,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:59,180 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 178 transitions. [2018-09-26 21:17:59,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-26 21:17:59,181 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 178 transitions. [2018-09-26 21:17:59,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-09-26 21:17:59,181 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:59,182 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 34, 33, 33, 1, 1, 1, 1, 1] [2018-09-26 21:17:59,182 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:59,182 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:59,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1483312547, now seen corresponding path program 66 times [2018-09-26 21:17:59,182 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:59,183 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:59,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:59,183 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:59,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:59,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:59,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2839 backedges. 661 proven. 2178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:17:59,754 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:59,754 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:17:59,761 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:17:59,879 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-09-26 21:17:59,879 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:59,883 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:59,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2839 backedges. 661 proven. 2178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:17:59,933 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:59,934 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-26 21:17:59,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-26 21:17:59,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-26 21:17:59,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-26 21:17:59,934 INFO L87 Difference]: Start difference. First operand 176 states and 178 transitions. Second operand 37 states. [2018-09-26 21:18:00,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:00,132 INFO L93 Difference]: Finished difference Result 190 states and 193 transitions. [2018-09-26 21:18:00,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-26 21:18:00,132 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 173 [2018-09-26 21:18:00,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:00,133 INFO L225 Difference]: With dead ends: 190 [2018-09-26 21:18:00,133 INFO L226 Difference]: Without dead ends: 184 [2018-09-26 21:18:00,134 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-26 21:18:00,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2018-09-26 21:18:00,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 180. [2018-09-26 21:18:00,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2018-09-26 21:18:00,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 182 transitions. [2018-09-26 21:18:00,155 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 182 transitions. Word has length 173 [2018-09-26 21:18:00,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:00,156 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 182 transitions. [2018-09-26 21:18:00,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-26 21:18:00,156 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 182 transitions. [2018-09-26 21:18:00,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-09-26 21:18:00,157 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:00,157 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 34, 1, 1, 1, 1, 1] [2018-09-26 21:18:00,157 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:00,157 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:00,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1794699091, now seen corresponding path program 67 times [2018-09-26 21:18:00,157 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:00,158 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:00,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:00,158 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:18:00,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:00,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:01,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2975 backedges. 2380 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:18:01,792 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:01,792 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:18:01,799 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:18:01,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:01,884 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:01,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2975 backedges. 2380 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:18:01,935 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:01,935 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-26 21:18:01,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-26 21:18:01,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-26 21:18:01,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=3781, Unknown=0, NotChecked=0, Total=5112 [2018-09-26 21:18:01,936 INFO L87 Difference]: Start difference. First operand 180 states and 182 transitions. Second operand 72 states. [2018-09-26 21:18:04,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:04,661 INFO L93 Difference]: Finished difference Result 328 states and 332 transitions. [2018-09-26 21:18:04,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-26 21:18:04,661 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 177 [2018-09-26 21:18:04,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:04,662 INFO L225 Difference]: With dead ends: 328 [2018-09-26 21:18:04,662 INFO L226 Difference]: Without dead ends: 181 [2018-09-26 21:18:04,663 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1751 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2661, Invalid=8681, Unknown=0, NotChecked=0, Total=11342 [2018-09-26 21:18:04,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-09-26 21:18:04,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-09-26 21:18:04,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-09-26 21:18:04,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 183 transitions. [2018-09-26 21:18:04,679 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 183 transitions. Word has length 177 [2018-09-26 21:18:04,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:04,679 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 183 transitions. [2018-09-26 21:18:04,679 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-26 21:18:04,679 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 183 transitions. [2018-09-26 21:18:04,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-09-26 21:18:04,680 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:04,680 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 35, 34, 34, 1, 1, 1, 1, 1] [2018-09-26 21:18:04,680 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:04,680 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:04,680 INFO L82 PathProgramCache]: Analyzing trace with hash 2072574202, now seen corresponding path program 68 times [2018-09-26 21:18:04,681 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:04,681 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:04,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:04,681 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:18:04,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:04,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:05,313 INFO L134 CoverageAnalysis]: Checked inductivity of 3010 backedges. 698 proven. 2312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:18:05,313 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:05,313 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:18:05,322 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:18:05,404 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:18:05,404 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:18:05,408 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:05,437 INFO L134 CoverageAnalysis]: Checked inductivity of 3010 backedges. 698 proven. 2312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:18:05,458 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:05,458 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-26 21:18:05,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-26 21:18:05,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-26 21:18:05,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-26 21:18:05,459 INFO L87 Difference]: Start difference. First operand 181 states and 183 transitions. Second operand 38 states. [2018-09-26 21:18:05,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:05,666 INFO L93 Difference]: Finished difference Result 195 states and 198 transitions. [2018-09-26 21:18:05,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-26 21:18:05,666 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 178 [2018-09-26 21:18:05,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:05,668 INFO L225 Difference]: With dead ends: 195 [2018-09-26 21:18:05,668 INFO L226 Difference]: Without dead ends: 189 [2018-09-26 21:18:05,668 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-26 21:18:05,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-09-26 21:18:05,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 185. [2018-09-26 21:18:05,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-09-26 21:18:05,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 187 transitions. [2018-09-26 21:18:05,685 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 187 transitions. Word has length 178 [2018-09-26 21:18:05,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:05,685 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 187 transitions. [2018-09-26 21:18:05,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-26 21:18:05,685 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 187 transitions. [2018-09-26 21:18:05,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-09-26 21:18:05,686 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:05,687 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 35, 1, 1, 1, 1, 1] [2018-09-26 21:18:05,687 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:05,687 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:05,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1591533424, now seen corresponding path program 69 times [2018-09-26 21:18:05,687 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:05,688 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:05,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:05,688 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:18:05,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:05,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:07,266 INFO L134 CoverageAnalysis]: Checked inductivity of 3150 backedges. 2520 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:18:07,266 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:07,266 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:18:07,273 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:18:07,406 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-09-26 21:18:07,406 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:18:07,411 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:07,451 INFO L134 CoverageAnalysis]: Checked inductivity of 3150 backedges. 2520 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:18:07,482 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:07,483 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-26 21:18:07,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-26 21:18:07,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-26 21:18:07,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1405, Invalid=3997, Unknown=0, NotChecked=0, Total=5402 [2018-09-26 21:18:07,484 INFO L87 Difference]: Start difference. First operand 185 states and 187 transitions. Second operand 74 states. [2018-09-26 21:18:10,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:10,489 INFO L93 Difference]: Finished difference Result 337 states and 341 transitions. [2018-09-26 21:18:10,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-26 21:18:10,490 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 182 [2018-09-26 21:18:10,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:10,490 INFO L225 Difference]: With dead ends: 337 [2018-09-26 21:18:10,490 INFO L226 Difference]: Without dead ends: 186 [2018-09-26 21:18:10,491 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1855 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2809, Invalid=9181, Unknown=0, NotChecked=0, Total=11990 [2018-09-26 21:18:10,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2018-09-26 21:18:10,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2018-09-26 21:18:10,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2018-09-26 21:18:10,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 188 transitions. [2018-09-26 21:18:10,507 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 188 transitions. Word has length 182 [2018-09-26 21:18:10,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:10,507 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 188 transitions. [2018-09-26 21:18:10,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-26 21:18:10,508 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 188 transitions. [2018-09-26 21:18:10,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-09-26 21:18:10,508 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:10,508 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 36, 35, 35, 1, 1, 1, 1, 1] [2018-09-26 21:18:10,509 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:10,509 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:10,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1595685335, now seen corresponding path program 70 times [2018-09-26 21:18:10,509 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:10,509 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:10,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:10,510 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:18:10,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:10,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:11,203 INFO L134 CoverageAnalysis]: Checked inductivity of 3186 backedges. 736 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:18:11,203 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:11,203 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:18:11,211 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:18:11,300 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:18:11,300 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:18:11,305 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:11,348 INFO L134 CoverageAnalysis]: Checked inductivity of 3186 backedges. 736 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:18:11,380 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:11,380 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-26 21:18:11,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-26 21:18:11,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-26 21:18:11,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-26 21:18:11,381 INFO L87 Difference]: Start difference. First operand 186 states and 188 transitions. Second operand 39 states. [2018-09-26 21:18:11,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:11,605 INFO L93 Difference]: Finished difference Result 200 states and 203 transitions. [2018-09-26 21:18:11,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-26 21:18:11,605 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 183 [2018-09-26 21:18:11,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:11,606 INFO L225 Difference]: With dead ends: 200 [2018-09-26 21:18:11,606 INFO L226 Difference]: Without dead ends: 194 [2018-09-26 21:18:11,607 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-26 21:18:11,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-09-26 21:18:11,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 190. [2018-09-26 21:18:11,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2018-09-26 21:18:11,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 192 transitions. [2018-09-26 21:18:11,623 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 192 transitions. Word has length 183 [2018-09-26 21:18:11,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:11,623 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 192 transitions. [2018-09-26 21:18:11,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-26 21:18:11,623 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 192 transitions. [2018-09-26 21:18:11,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2018-09-26 21:18:11,624 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:11,624 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 36, 1, 1, 1, 1, 1] [2018-09-26 21:18:11,624 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:11,624 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:11,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1835041505, now seen corresponding path program 71 times [2018-09-26 21:18:11,625 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:11,625 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:11,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:11,625 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:18:11,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:11,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:13,258 INFO L134 CoverageAnalysis]: Checked inductivity of 3330 backedges. 2664 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:18:13,258 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:13,258 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:18:13,265 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:18:13,382 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-09-26 21:18:13,382 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:18:13,387 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:13,419 INFO L134 CoverageAnalysis]: Checked inductivity of 3330 backedges. 2664 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:18:13,440 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:13,440 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-26 21:18:13,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-26 21:18:13,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-26 21:18:13,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1481, Invalid=4219, Unknown=0, NotChecked=0, Total=5700 [2018-09-26 21:18:13,442 INFO L87 Difference]: Start difference. First operand 190 states and 192 transitions. Second operand 76 states. [2018-09-26 21:18:16,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:16,407 INFO L93 Difference]: Finished difference Result 346 states and 350 transitions. [2018-09-26 21:18:16,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-26 21:18:16,407 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 187 [2018-09-26 21:18:16,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:16,408 INFO L225 Difference]: With dead ends: 346 [2018-09-26 21:18:16,408 INFO L226 Difference]: Without dead ends: 191 [2018-09-26 21:18:16,410 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1962 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2961, Invalid=9695, Unknown=0, NotChecked=0, Total=12656 [2018-09-26 21:18:16,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-09-26 21:18:16,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-09-26 21:18:16,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-09-26 21:18:16,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 193 transitions. [2018-09-26 21:18:16,433 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 193 transitions. Word has length 187 [2018-09-26 21:18:16,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:16,433 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 193 transitions. [2018-09-26 21:18:16,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-26 21:18:16,433 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 193 transitions. [2018-09-26 21:18:16,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-09-26 21:18:16,434 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:16,434 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 37, 36, 36, 1, 1, 1, 1, 1] [2018-09-26 21:18:16,434 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:16,434 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:16,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1521017350, now seen corresponding path program 72 times [2018-09-26 21:18:16,435 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:16,435 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:16,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:16,436 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:18:16,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:16,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:17,076 INFO L134 CoverageAnalysis]: Checked inductivity of 3367 backedges. 775 proven. 2592 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:18:17,076 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:17,076 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:18:17,099 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:18:17,236 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-26 21:18:17,236 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:18:17,241 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:17,278 INFO L134 CoverageAnalysis]: Checked inductivity of 3367 backedges. 775 proven. 2592 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:18:17,298 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:17,299 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-26 21:18:17,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-26 21:18:17,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-26 21:18:17,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-26 21:18:17,300 INFO L87 Difference]: Start difference. First operand 191 states and 193 transitions. Second operand 40 states. [2018-09-26 21:18:17,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:17,521 INFO L93 Difference]: Finished difference Result 205 states and 208 transitions. [2018-09-26 21:18:17,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-26 21:18:17,521 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 188 [2018-09-26 21:18:17,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:17,522 INFO L225 Difference]: With dead ends: 205 [2018-09-26 21:18:17,522 INFO L226 Difference]: Without dead ends: 199 [2018-09-26 21:18:17,522 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-26 21:18:17,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-09-26 21:18:17,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 195. [2018-09-26 21:18:17,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-09-26 21:18:17,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 197 transitions. [2018-09-26 21:18:17,546 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 197 transitions. Word has length 188 [2018-09-26 21:18:17,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:17,546 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 197 transitions. [2018-09-26 21:18:17,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-26 21:18:17,546 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 197 transitions. [2018-09-26 21:18:17,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-09-26 21:18:17,547 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:17,547 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 37, 1, 1, 1, 1, 1] [2018-09-26 21:18:17,548 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:17,548 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:17,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1787388540, now seen corresponding path program 73 times [2018-09-26 21:18:17,548 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:17,548 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:17,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:17,549 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:18:17,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:17,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:19,839 INFO L134 CoverageAnalysis]: Checked inductivity of 3515 backedges. 2812 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:18:19,839 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:19,839 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:18:19,846 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:18:19,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:19,940 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:19,982 INFO L134 CoverageAnalysis]: Checked inductivity of 3515 backedges. 2812 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:18:20,003 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:20,003 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-26 21:18:20,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-26 21:18:20,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-26 21:18:20,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1559, Invalid=4447, Unknown=0, NotChecked=0, Total=6006 [2018-09-26 21:18:20,005 INFO L87 Difference]: Start difference. First operand 195 states and 197 transitions. Second operand 78 states. [2018-09-26 21:18:22,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:22,364 INFO L93 Difference]: Finished difference Result 355 states and 359 transitions. [2018-09-26 21:18:22,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-26 21:18:22,364 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 192 [2018-09-26 21:18:22,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:22,365 INFO L225 Difference]: With dead ends: 355 [2018-09-26 21:18:22,365 INFO L226 Difference]: Without dead ends: 196 [2018-09-26 21:18:22,365 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2072 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3117, Invalid=10223, Unknown=0, NotChecked=0, Total=13340 [2018-09-26 21:18:22,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2018-09-26 21:18:22,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2018-09-26 21:18:22,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-09-26 21:18:22,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 198 transitions. [2018-09-26 21:18:22,387 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 198 transitions. Word has length 192 [2018-09-26 21:18:22,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:22,387 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 198 transitions. [2018-09-26 21:18:22,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-26 21:18:22,387 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 198 transitions. [2018-09-26 21:18:22,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2018-09-26 21:18:22,388 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:22,388 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 38, 37, 37, 1, 1, 1, 1, 1] [2018-09-26 21:18:22,388 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:22,389 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:22,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1861088757, now seen corresponding path program 74 times [2018-09-26 21:18:22,389 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:22,389 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:22,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:22,390 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:18:22,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:22,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:23,080 INFO L134 CoverageAnalysis]: Checked inductivity of 3553 backedges. 815 proven. 2738 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:18:23,080 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:23,080 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:18:23,087 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:18:23,177 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:18:23,178 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:18:23,181 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:23,214 INFO L134 CoverageAnalysis]: Checked inductivity of 3553 backedges. 815 proven. 2738 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:18:23,235 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:23,236 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-26 21:18:23,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-26 21:18:23,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-26 21:18:23,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-26 21:18:23,237 INFO L87 Difference]: Start difference. First operand 196 states and 198 transitions. Second operand 41 states. [2018-09-26 21:18:23,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:23,459 INFO L93 Difference]: Finished difference Result 210 states and 213 transitions. [2018-09-26 21:18:23,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-26 21:18:23,459 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 193 [2018-09-26 21:18:23,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:23,460 INFO L225 Difference]: With dead ends: 210 [2018-09-26 21:18:23,460 INFO L226 Difference]: Without dead ends: 204 [2018-09-26 21:18:23,460 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-26 21:18:23,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2018-09-26 21:18:23,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 200. [2018-09-26 21:18:23,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2018-09-26 21:18:23,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 202 transitions. [2018-09-26 21:18:23,479 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 202 transitions. Word has length 193 [2018-09-26 21:18:23,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:23,479 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 202 transitions. [2018-09-26 21:18:23,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-26 21:18:23,479 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 202 transitions. [2018-09-26 21:18:23,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-09-26 21:18:23,480 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:23,480 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 38, 1, 1, 1, 1, 1] [2018-09-26 21:18:23,480 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:23,480 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:23,480 INFO L82 PathProgramCache]: Analyzing trace with hash -315300117, now seen corresponding path program 75 times [2018-09-26 21:18:23,481 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:23,481 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:23,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:23,481 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:18:23,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:23,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:25,454 INFO L134 CoverageAnalysis]: Checked inductivity of 3705 backedges. 2964 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:18:25,454 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:25,454 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:18:25,462 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:18:25,645 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-09-26 21:18:25,645 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:18:25,651 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:25,715 INFO L134 CoverageAnalysis]: Checked inductivity of 3705 backedges. 2964 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:18:25,746 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:25,746 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-09-26 21:18:25,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-26 21:18:25,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-26 21:18:25,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1639, Invalid=4681, Unknown=0, NotChecked=0, Total=6320 [2018-09-26 21:18:25,747 INFO L87 Difference]: Start difference. First operand 200 states and 202 transitions. Second operand 80 states. [2018-09-26 21:18:28,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:28,862 INFO L93 Difference]: Finished difference Result 364 states and 368 transitions. [2018-09-26 21:18:28,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-26 21:18:28,863 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 197 [2018-09-26 21:18:28,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:28,864 INFO L225 Difference]: With dead ends: 364 [2018-09-26 21:18:28,864 INFO L226 Difference]: Without dead ends: 201 [2018-09-26 21:18:28,865 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2185 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3277, Invalid=10765, Unknown=0, NotChecked=0, Total=14042 [2018-09-26 21:18:28,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-09-26 21:18:28,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2018-09-26 21:18:28,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-09-26 21:18:28,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 203 transitions. [2018-09-26 21:18:28,890 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 203 transitions. Word has length 197 [2018-09-26 21:18:28,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:28,890 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 203 transitions. [2018-09-26 21:18:28,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-26 21:18:28,890 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 203 transitions. [2018-09-26 21:18:28,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-09-26 21:18:28,891 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:28,891 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 39, 38, 38, 1, 1, 1, 1, 1] [2018-09-26 21:18:28,891 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:28,892 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:28,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1372678382, now seen corresponding path program 76 times [2018-09-26 21:18:28,892 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:28,892 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:28,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:28,893 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:18:28,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:28,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:29,900 INFO L134 CoverageAnalysis]: Checked inductivity of 3744 backedges. 856 proven. 2888 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:18:29,900 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:29,900 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:18:29,907 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:18:30,003 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:18:30,004 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:18:30,009 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:30,044 INFO L134 CoverageAnalysis]: Checked inductivity of 3744 backedges. 856 proven. 2888 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:18:30,064 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:30,065 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-26 21:18:30,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-26 21:18:30,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-26 21:18:30,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-26 21:18:30,065 INFO L87 Difference]: Start difference. First operand 201 states and 203 transitions. Second operand 42 states. [2018-09-26 21:18:30,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:30,340 INFO L93 Difference]: Finished difference Result 215 states and 218 transitions. [2018-09-26 21:18:30,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-26 21:18:30,341 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 198 [2018-09-26 21:18:30,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:30,342 INFO L225 Difference]: With dead ends: 215 [2018-09-26 21:18:30,342 INFO L226 Difference]: Without dead ends: 209 [2018-09-26 21:18:30,342 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-26 21:18:30,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-09-26 21:18:30,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 205. [2018-09-26 21:18:30,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-09-26 21:18:30,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 207 transitions. [2018-09-26 21:18:30,368 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 207 transitions. Word has length 198 [2018-09-26 21:18:30,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:30,368 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 207 transitions. [2018-09-26 21:18:30,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-26 21:18:30,369 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 207 transitions. [2018-09-26 21:18:30,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-09-26 21:18:30,369 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:30,370 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 39, 1, 1, 1, 1, 1] [2018-09-26 21:18:30,370 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:30,370 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:30,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1792389512, now seen corresponding path program 77 times [2018-09-26 21:18:30,370 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:30,370 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:30,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:30,371 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:18:30,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:30,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:32,275 INFO L134 CoverageAnalysis]: Checked inductivity of 3900 backedges. 3120 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:18:32,275 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:32,275 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:18:32,283 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:18:32,420 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-09-26 21:18:32,420 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:18:32,424 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:32,461 INFO L134 CoverageAnalysis]: Checked inductivity of 3900 backedges. 3120 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:18:32,483 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:32,483 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-09-26 21:18:32,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-26 21:18:32,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-26 21:18:32,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1721, Invalid=4921, Unknown=0, NotChecked=0, Total=6642 [2018-09-26 21:18:32,485 INFO L87 Difference]: Start difference. First operand 205 states and 207 transitions. Second operand 82 states. [2018-09-26 21:18:35,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:35,334 INFO L93 Difference]: Finished difference Result 373 states and 377 transitions. [2018-09-26 21:18:35,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-26 21:18:35,334 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 202 [2018-09-26 21:18:35,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:35,335 INFO L225 Difference]: With dead ends: 373 [2018-09-26 21:18:35,335 INFO L226 Difference]: Without dead ends: 206 [2018-09-26 21:18:35,336 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2301 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3441, Invalid=11321, Unknown=0, NotChecked=0, Total=14762 [2018-09-26 21:18:35,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2018-09-26 21:18:35,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2018-09-26 21:18:35,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2018-09-26 21:18:35,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 208 transitions. [2018-09-26 21:18:35,383 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 208 transitions. Word has length 202 [2018-09-26 21:18:35,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:35,383 INFO L480 AbstractCegarLoop]: Abstraction has 206 states and 208 transitions. [2018-09-26 21:18:35,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-26 21:18:35,384 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 208 transitions. [2018-09-26 21:18:35,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2018-09-26 21:18:35,385 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:35,385 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 40, 39, 39, 1, 1, 1, 1, 1] [2018-09-26 21:18:35,385 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:35,385 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:35,385 INFO L82 PathProgramCache]: Analyzing trace with hash -185138751, now seen corresponding path program 78 times [2018-09-26 21:18:35,385 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:35,386 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:35,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:35,386 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:18:35,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:35,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:36,159 INFO L134 CoverageAnalysis]: Checked inductivity of 3940 backedges. 898 proven. 3042 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:18:36,160 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:36,160 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:18:36,166 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:18:36,308 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2018-09-26 21:18:36,309 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:18:36,313 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:36,350 INFO L134 CoverageAnalysis]: Checked inductivity of 3940 backedges. 898 proven. 3042 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:18:36,370 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:36,370 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-26 21:18:36,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-26 21:18:36,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-26 21:18:36,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-26 21:18:36,371 INFO L87 Difference]: Start difference. First operand 206 states and 208 transitions. Second operand 43 states. [2018-09-26 21:18:36,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:36,632 INFO L93 Difference]: Finished difference Result 220 states and 223 transitions. [2018-09-26 21:18:36,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-26 21:18:36,638 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 203 [2018-09-26 21:18:36,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:36,639 INFO L225 Difference]: With dead ends: 220 [2018-09-26 21:18:36,639 INFO L226 Difference]: Without dead ends: 214 [2018-09-26 21:18:36,639 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-26 21:18:36,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2018-09-26 21:18:36,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 210. [2018-09-26 21:18:36,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2018-09-26 21:18:36,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 212 transitions. [2018-09-26 21:18:36,666 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 212 transitions. Word has length 203 [2018-09-26 21:18:36,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:36,666 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 212 transitions. [2018-09-26 21:18:36,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-26 21:18:36,666 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 212 transitions. [2018-09-26 21:18:36,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-09-26 21:18:36,667 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:36,667 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 40, 40, 40, 1, 1, 1, 1, 1] [2018-09-26 21:18:36,668 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:36,668 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:36,668 INFO L82 PathProgramCache]: Analyzing trace with hash -319083337, now seen corresponding path program 79 times [2018-09-26 21:18:36,668 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:36,668 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:36,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:36,669 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:18:36,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:36,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:38,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4100 backedges. 3280 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:18:38,687 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:38,687 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:18:38,693 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:18:38,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:38,798 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:38,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4100 backedges. 3280 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:18:38,857 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:38,857 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-09-26 21:18:38,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-26 21:18:38,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-26 21:18:38,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1805, Invalid=5167, Unknown=0, NotChecked=0, Total=6972 [2018-09-26 21:18:38,858 INFO L87 Difference]: Start difference. First operand 210 states and 212 transitions. Second operand 84 states. [2018-09-26 21:18:41,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:41,586 INFO L93 Difference]: Finished difference Result 382 states and 386 transitions. [2018-09-26 21:18:41,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-26 21:18:41,587 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 207 [2018-09-26 21:18:41,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:41,588 INFO L225 Difference]: With dead ends: 382 [2018-09-26 21:18:41,588 INFO L226 Difference]: Without dead ends: 211 [2018-09-26 21:18:41,589 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2420 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3609, Invalid=11891, Unknown=0, NotChecked=0, Total=15500 [2018-09-26 21:18:41,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-09-26 21:18:41,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2018-09-26 21:18:41,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-09-26 21:18:41,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 213 transitions. [2018-09-26 21:18:41,608 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 213 transitions. Word has length 207 [2018-09-26 21:18:41,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:41,608 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 213 transitions. [2018-09-26 21:18:41,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-26 21:18:41,608 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 213 transitions. [2018-09-26 21:18:41,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-09-26 21:18:41,609 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:41,609 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 41, 40, 40, 1, 1, 1, 1, 1] [2018-09-26 21:18:41,609 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:41,609 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:41,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1953503262, now seen corresponding path program 80 times [2018-09-26 21:18:41,609 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:41,610 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:41,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:41,610 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:18:41,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:41,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:42,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4141 backedges. 941 proven. 3200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:18:42,402 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:42,402 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:18:42,410 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:18:42,510 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:18:42,510 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:18:42,516 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:42,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4141 backedges. 941 proven. 3200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:18:42,602 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:42,602 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-26 21:18:42,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-26 21:18:42,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-26 21:18:42,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-26 21:18:42,603 INFO L87 Difference]: Start difference. First operand 211 states and 213 transitions. Second operand 44 states. [2018-09-26 21:18:42,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:42,862 INFO L93 Difference]: Finished difference Result 225 states and 228 transitions. [2018-09-26 21:18:42,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-26 21:18:42,862 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 208 [2018-09-26 21:18:42,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:42,863 INFO L225 Difference]: With dead ends: 225 [2018-09-26 21:18:42,863 INFO L226 Difference]: Without dead ends: 219 [2018-09-26 21:18:42,864 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-26 21:18:42,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-09-26 21:18:42,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 215. [2018-09-26 21:18:42,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2018-09-26 21:18:42,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 217 transitions. [2018-09-26 21:18:42,883 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 217 transitions. Word has length 208 [2018-09-26 21:18:42,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:42,883 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 217 transitions. [2018-09-26 21:18:42,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-26 21:18:42,883 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 217 transitions. [2018-09-26 21:18:42,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-09-26 21:18:42,884 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:42,884 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 41, 41, 41, 1, 1, 1, 1, 1] [2018-09-26 21:18:42,884 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:42,884 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:42,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1125633172, now seen corresponding path program 81 times [2018-09-26 21:18:42,884 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:42,885 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:42,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:42,885 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:18:42,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:42,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:45,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4305 backedges. 3444 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:18:45,199 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:45,199 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:18:45,206 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:18:45,368 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-09-26 21:18:45,368 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:18:45,375 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:45,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4305 backedges. 3444 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:18:45,460 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:45,460 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-09-26 21:18:45,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-26 21:18:45,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-26 21:18:45,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=5419, Unknown=0, NotChecked=0, Total=7310 [2018-09-26 21:18:45,462 INFO L87 Difference]: Start difference. First operand 215 states and 217 transitions. Second operand 86 states. [2018-09-26 21:18:48,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:48,087 INFO L93 Difference]: Finished difference Result 391 states and 395 transitions. [2018-09-26 21:18:48,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-26 21:18:48,087 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 212 [2018-09-26 21:18:48,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:48,088 INFO L225 Difference]: With dead ends: 391 [2018-09-26 21:18:48,088 INFO L226 Difference]: Without dead ends: 216 [2018-09-26 21:18:48,089 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2542 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3781, Invalid=12475, Unknown=0, NotChecked=0, Total=16256 [2018-09-26 21:18:48,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2018-09-26 21:18:48,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2018-09-26 21:18:48,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2018-09-26 21:18:48,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 218 transitions. [2018-09-26 21:18:48,110 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 218 transitions. Word has length 212 [2018-09-26 21:18:48,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:48,110 INFO L480 AbstractCegarLoop]: Abstraction has 216 states and 218 transitions. [2018-09-26 21:18:48,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-26 21:18:48,111 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 218 transitions. [2018-09-26 21:18:48,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2018-09-26 21:18:48,111 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:48,112 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 42, 41, 41, 1, 1, 1, 1, 1] [2018-09-26 21:18:48,112 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:48,112 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:48,112 INFO L82 PathProgramCache]: Analyzing trace with hash -155129459, now seen corresponding path program 82 times [2018-09-26 21:18:48,112 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:48,112 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:48,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:48,113 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:18:48,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:48,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:48,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 985 proven. 3362 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:18:48,933 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:48,934 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:18:48,941 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:18:49,044 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:18:49,044 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:18:49,050 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:49,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 985 proven. 3362 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:18:49,110 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:49,110 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-26 21:18:49,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-26 21:18:49,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-26 21:18:49,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-26 21:18:49,111 INFO L87 Difference]: Start difference. First operand 216 states and 218 transitions. Second operand 45 states. [2018-09-26 21:18:49,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:49,432 INFO L93 Difference]: Finished difference Result 230 states and 233 transitions. [2018-09-26 21:18:49,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-26 21:18:49,432 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 213 [2018-09-26 21:18:49,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:49,433 INFO L225 Difference]: With dead ends: 230 [2018-09-26 21:18:49,433 INFO L226 Difference]: Without dead ends: 224 [2018-09-26 21:18:49,434 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-26 21:18:49,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2018-09-26 21:18:49,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 220. [2018-09-26 21:18:49,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2018-09-26 21:18:49,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 222 transitions. [2018-09-26 21:18:49,455 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 222 transitions. Word has length 213 [2018-09-26 21:18:49,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:49,455 INFO L480 AbstractCegarLoop]: Abstraction has 220 states and 222 transitions. [2018-09-26 21:18:49,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-26 21:18:49,456 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 222 transitions. [2018-09-26 21:18:49,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2018-09-26 21:18:49,456 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:49,457 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 42, 42, 42, 1, 1, 1, 1, 1] [2018-09-26 21:18:49,457 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:49,457 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:49,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1531687293, now seen corresponding path program 83 times [2018-09-26 21:18:49,457 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:49,457 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:49,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:49,458 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:18:49,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:49,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:51,998 INFO L134 CoverageAnalysis]: Checked inductivity of 4515 backedges. 3612 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:18:51,999 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:51,999 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:18:52,006 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:18:52,151 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-09-26 21:18:52,151 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:18:52,156 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:52,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4515 backedges. 3612 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:18:52,216 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:52,216 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-09-26 21:18:52,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-26 21:18:52,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-26 21:18:52,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1979, Invalid=5677, Unknown=0, NotChecked=0, Total=7656 [2018-09-26 21:18:52,218 INFO L87 Difference]: Start difference. First operand 220 states and 222 transitions. Second operand 88 states. [2018-09-26 21:18:55,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:55,159 INFO L93 Difference]: Finished difference Result 400 states and 404 transitions. [2018-09-26 21:18:55,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-26 21:18:55,159 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 217 [2018-09-26 21:18:55,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:55,160 INFO L225 Difference]: With dead ends: 400 [2018-09-26 21:18:55,160 INFO L226 Difference]: Without dead ends: 221 [2018-09-26 21:18:55,161 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2667 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3957, Invalid=13073, Unknown=0, NotChecked=0, Total=17030 [2018-09-26 21:18:55,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-09-26 21:18:55,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2018-09-26 21:18:55,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-09-26 21:18:55,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 223 transitions. [2018-09-26 21:18:55,182 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 223 transitions. Word has length 217 [2018-09-26 21:18:55,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:55,182 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 223 transitions. [2018-09-26 21:18:55,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-26 21:18:55,182 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 223 transitions. [2018-09-26 21:18:55,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-09-26 21:18:55,183 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:55,183 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 43, 42, 42, 1, 1, 1, 1, 1] [2018-09-26 21:18:55,183 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:55,183 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:55,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1128490282, now seen corresponding path program 84 times [2018-09-26 21:18:55,183 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:55,184 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:55,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:55,184 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:18:55,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:55,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:56,045 INFO L134 CoverageAnalysis]: Checked inductivity of 4558 backedges. 1030 proven. 3528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:18:56,045 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:56,045 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:18:56,054 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:18:56,210 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-26 21:18:56,210 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:18:56,215 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:56,256 INFO L134 CoverageAnalysis]: Checked inductivity of 4558 backedges. 1030 proven. 3528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:18:56,277 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:56,277 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-26 21:18:56,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-26 21:18:56,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-26 21:18:56,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-26 21:18:56,279 INFO L87 Difference]: Start difference. First operand 221 states and 223 transitions. Second operand 46 states. [2018-09-26 21:18:56,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:56,543 INFO L93 Difference]: Finished difference Result 235 states and 238 transitions. [2018-09-26 21:18:56,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-26 21:18:56,543 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 218 [2018-09-26 21:18:56,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:56,544 INFO L225 Difference]: With dead ends: 235 [2018-09-26 21:18:56,544 INFO L226 Difference]: Without dead ends: 229 [2018-09-26 21:18:56,545 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-26 21:18:56,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2018-09-26 21:18:56,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 225. [2018-09-26 21:18:56,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2018-09-26 21:18:56,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 227 transitions. [2018-09-26 21:18:56,567 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 227 transitions. Word has length 218 [2018-09-26 21:18:56,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:56,567 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 227 transitions. [2018-09-26 21:18:56,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-26 21:18:56,567 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 227 transitions. [2018-09-26 21:18:56,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-09-26 21:18:56,568 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:56,568 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 43, 43, 43, 1, 1, 1, 1, 1] [2018-09-26 21:18:56,568 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:56,568 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:56,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1373260896, now seen corresponding path program 85 times [2018-09-26 21:18:56,569 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:56,569 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:56,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:56,569 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:18:56,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:56,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:58,838 INFO L134 CoverageAnalysis]: Checked inductivity of 4730 backedges. 3784 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:18:58,839 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:58,839 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:18:58,847 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:18:58,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:58,956 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:58,998 INFO L134 CoverageAnalysis]: Checked inductivity of 4730 backedges. 3784 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:18:59,019 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:59,019 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-09-26 21:18:59,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-26 21:18:59,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-26 21:18:59,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2069, Invalid=5941, Unknown=0, NotChecked=0, Total=8010 [2018-09-26 21:18:59,020 INFO L87 Difference]: Start difference. First operand 225 states and 227 transitions. Second operand 90 states. [2018-09-26 21:19:02,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:02,103 INFO L93 Difference]: Finished difference Result 409 states and 413 transitions. [2018-09-26 21:19:02,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-26 21:19:02,104 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 222 [2018-09-26 21:19:02,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:02,105 INFO L225 Difference]: With dead ends: 409 [2018-09-26 21:19:02,105 INFO L226 Difference]: Without dead ends: 226 [2018-09-26 21:19:02,106 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2795 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4137, Invalid=13685, Unknown=0, NotChecked=0, Total=17822 [2018-09-26 21:19:02,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2018-09-26 21:19:02,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2018-09-26 21:19:02,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2018-09-26 21:19:02,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 228 transitions. [2018-09-26 21:19:02,127 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 228 transitions. Word has length 222 [2018-09-26 21:19:02,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:02,127 INFO L480 AbstractCegarLoop]: Abstraction has 226 states and 228 transitions. [2018-09-26 21:19:02,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-26 21:19:02,127 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 228 transitions. [2018-09-26 21:19:02,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2018-09-26 21:19:02,128 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:02,128 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 44, 43, 43, 1, 1, 1, 1, 1] [2018-09-26 21:19:02,129 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:02,129 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:02,129 INFO L82 PathProgramCache]: Analyzing trace with hash 2022550873, now seen corresponding path program 86 times [2018-09-26 21:19:02,129 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:02,129 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:02,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:02,130 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:19:02,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:02,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:03,046 INFO L134 CoverageAnalysis]: Checked inductivity of 4774 backedges. 1076 proven. 3698 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:19:03,046 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:03,046 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:19:03,053 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:19:03,158 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:19:03,159 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:19:03,163 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:19:03,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4774 backedges. 1076 proven. 3698 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:19:03,229 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:03,230 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-26 21:19:03,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-26 21:19:03,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-26 21:19:03,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-26 21:19:03,231 INFO L87 Difference]: Start difference. First operand 226 states and 228 transitions. Second operand 47 states. [2018-09-26 21:19:03,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:03,537 INFO L93 Difference]: Finished difference Result 240 states and 243 transitions. [2018-09-26 21:19:03,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-26 21:19:03,537 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 223 [2018-09-26 21:19:03,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:03,538 INFO L225 Difference]: With dead ends: 240 [2018-09-26 21:19:03,538 INFO L226 Difference]: Without dead ends: 234 [2018-09-26 21:19:03,538 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-26 21:19:03,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2018-09-26 21:19:03,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 230. [2018-09-26 21:19:03,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2018-09-26 21:19:03,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 232 transitions. [2018-09-26 21:19:03,561 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 232 transitions. Word has length 223 [2018-09-26 21:19:03,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:03,561 INFO L480 AbstractCegarLoop]: Abstraction has 230 states and 232 transitions. [2018-09-26 21:19:03,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-26 21:19:03,561 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 232 transitions. [2018-09-26 21:19:03,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2018-09-26 21:19:03,562 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:03,562 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 44, 44, 44, 1, 1, 1, 1, 1] [2018-09-26 21:19:03,562 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:03,562 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:03,562 INFO L82 PathProgramCache]: Analyzing trace with hash 664947791, now seen corresponding path program 87 times [2018-09-26 21:19:03,563 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:03,563 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:03,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:03,563 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:19:03,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:03,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:06,304 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 3960 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:19:06,304 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:06,304 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:19:06,315 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:19:06,503 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-09-26 21:19:06,503 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:19:06,508 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:19:06,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 3960 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:19:06,571 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:06,572 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-09-26 21:19:06,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-26 21:19:06,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-26 21:19:06,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2161, Invalid=6211, Unknown=0, NotChecked=0, Total=8372 [2018-09-26 21:19:06,574 INFO L87 Difference]: Start difference. First operand 230 states and 232 transitions. Second operand 92 states. [2018-09-26 21:19:09,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:09,651 INFO L93 Difference]: Finished difference Result 418 states and 422 transitions. [2018-09-26 21:19:09,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-26 21:19:09,651 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 227 [2018-09-26 21:19:09,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:09,652 INFO L225 Difference]: With dead ends: 418 [2018-09-26 21:19:09,652 INFO L226 Difference]: Without dead ends: 231 [2018-09-26 21:19:09,653 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2926 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=4321, Invalid=14311, Unknown=0, NotChecked=0, Total=18632 [2018-09-26 21:19:09,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2018-09-26 21:19:09,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2018-09-26 21:19:09,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2018-09-26 21:19:09,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 233 transitions. [2018-09-26 21:19:09,675 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 233 transitions. Word has length 227 [2018-09-26 21:19:09,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:09,675 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 233 transitions. [2018-09-26 21:19:09,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-26 21:19:09,675 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 233 transitions. [2018-09-26 21:19:09,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2018-09-26 21:19:09,676 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:09,676 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 45, 44, 44, 1, 1, 1, 1, 1] [2018-09-26 21:19:09,676 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:09,677 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:09,677 INFO L82 PathProgramCache]: Analyzing trace with hash -402751946, now seen corresponding path program 88 times [2018-09-26 21:19:09,677 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:09,677 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:09,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:09,677 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:19:09,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:09,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:10,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4995 backedges. 1123 proven. 3872 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:19:10,987 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:10,988 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:19:10,995 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:19:11,105 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:19:11,105 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:19:11,113 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:19:11,157 INFO L134 CoverageAnalysis]: Checked inductivity of 4995 backedges. 1123 proven. 3872 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:19:11,177 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:11,177 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-26 21:19:11,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-26 21:19:11,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-26 21:19:11,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-26 21:19:11,178 INFO L87 Difference]: Start difference. First operand 231 states and 233 transitions. Second operand 48 states. [2018-09-26 21:19:11,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:11,508 INFO L93 Difference]: Finished difference Result 245 states and 248 transitions. [2018-09-26 21:19:11,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-26 21:19:11,515 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 228 [2018-09-26 21:19:11,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:11,516 INFO L225 Difference]: With dead ends: 245 [2018-09-26 21:19:11,516 INFO L226 Difference]: Without dead ends: 239 [2018-09-26 21:19:11,516 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-26 21:19:11,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2018-09-26 21:19:11,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 235. [2018-09-26 21:19:11,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2018-09-26 21:19:11,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 237 transitions. [2018-09-26 21:19:11,539 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 237 transitions. Word has length 228 [2018-09-26 21:19:11,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:11,540 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 237 transitions. [2018-09-26 21:19:11,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-26 21:19:11,540 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 237 transitions. [2018-09-26 21:19:11,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2018-09-26 21:19:11,540 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:11,541 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 45, 45, 45, 1, 1, 1, 1, 1] [2018-09-26 21:19:11,541 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:11,541 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:11,541 INFO L82 PathProgramCache]: Analyzing trace with hash -564828500, now seen corresponding path program 89 times [2018-09-26 21:19:11,541 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:11,541 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:11,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:11,542 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:19:11,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:11,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:14,013 INFO L134 CoverageAnalysis]: Checked inductivity of 5175 backedges. 4140 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:19:14,013 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:14,013 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:19:14,020 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:19:14,193 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-09-26 21:19:14,193 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:19:14,199 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:19:14,248 INFO L134 CoverageAnalysis]: Checked inductivity of 5175 backedges. 4140 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:19:14,268 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:14,269 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-09-26 21:19:14,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-26 21:19:14,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-26 21:19:14,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2255, Invalid=6487, Unknown=0, NotChecked=0, Total=8742 [2018-09-26 21:19:14,270 INFO L87 Difference]: Start difference. First operand 235 states and 237 transitions. Second operand 94 states. [2018-09-26 21:19:17,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:17,729 INFO L93 Difference]: Finished difference Result 427 states and 431 transitions. [2018-09-26 21:19:17,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-26 21:19:17,729 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 232 [2018-09-26 21:19:17,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:17,730 INFO L225 Difference]: With dead ends: 427 [2018-09-26 21:19:17,730 INFO L226 Difference]: Without dead ends: 236 [2018-09-26 21:19:17,731 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3060 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=4509, Invalid=14951, Unknown=0, NotChecked=0, Total=19460 [2018-09-26 21:19:17,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2018-09-26 21:19:17,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2018-09-26 21:19:17,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2018-09-26 21:19:17,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 238 transitions. [2018-09-26 21:19:17,761 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 238 transitions. Word has length 232 [2018-09-26 21:19:17,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:17,761 INFO L480 AbstractCegarLoop]: Abstraction has 236 states and 238 transitions. [2018-09-26 21:19:17,761 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-26 21:19:17,761 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 238 transitions. [2018-09-26 21:19:17,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2018-09-26 21:19:17,762 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:17,762 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 46, 45, 45, 1, 1, 1, 1, 1] [2018-09-26 21:19:17,762 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:17,763 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:17,763 INFO L82 PathProgramCache]: Analyzing trace with hash 522145061, now seen corresponding path program 90 times [2018-09-26 21:19:17,763 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:17,763 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:17,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:17,764 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:19:17,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:17,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:18,740 INFO L134 CoverageAnalysis]: Checked inductivity of 5221 backedges. 1171 proven. 4050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:19:18,740 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:18,740 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:19:18,748 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:19:18,916 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2018-09-26 21:19:18,916 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:19:18,923 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:19:18,970 INFO L134 CoverageAnalysis]: Checked inductivity of 5221 backedges. 1171 proven. 4050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:19:18,991 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:18,992 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-26 21:19:18,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-26 21:19:18,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-26 21:19:18,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-26 21:19:18,993 INFO L87 Difference]: Start difference. First operand 236 states and 238 transitions. Second operand 49 states. [2018-09-26 21:19:19,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:19,332 INFO L93 Difference]: Finished difference Result 250 states and 253 transitions. [2018-09-26 21:19:19,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-26 21:19:19,333 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 233 [2018-09-26 21:19:19,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:19,334 INFO L225 Difference]: With dead ends: 250 [2018-09-26 21:19:19,334 INFO L226 Difference]: Without dead ends: 244 [2018-09-26 21:19:19,334 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-26 21:19:19,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2018-09-26 21:19:19,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 240. [2018-09-26 21:19:19,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2018-09-26 21:19:19,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 242 transitions. [2018-09-26 21:19:19,358 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 242 transitions. Word has length 233 [2018-09-26 21:19:19,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:19,358 INFO L480 AbstractCegarLoop]: Abstraction has 240 states and 242 transitions. [2018-09-26 21:19:19,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-26 21:19:19,358 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 242 transitions. [2018-09-26 21:19:19,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2018-09-26 21:19:19,359 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:19,359 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 46, 46, 46, 1, 1, 1, 1, 1] [2018-09-26 21:19:19,360 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:19,360 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:19,360 INFO L82 PathProgramCache]: Analyzing trace with hash -377018853, now seen corresponding path program 91 times [2018-09-26 21:19:19,360 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:19,360 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:19,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:19,361 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:19:19,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:19,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:22,880 INFO L134 CoverageAnalysis]: Checked inductivity of 5405 backedges. 4324 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:19:22,880 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:22,880 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:19:22,888 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:19:22,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:23,000 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:19:23,062 INFO L134 CoverageAnalysis]: Checked inductivity of 5405 backedges. 4324 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:19:23,083 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:23,084 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-09-26 21:19:23,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-26 21:19:23,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-26 21:19:23,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2351, Invalid=6769, Unknown=0, NotChecked=0, Total=9120 [2018-09-26 21:19:23,085 INFO L87 Difference]: Start difference. First operand 240 states and 242 transitions. Second operand 96 states. [2018-09-26 21:19:26,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:26,463 INFO L93 Difference]: Finished difference Result 436 states and 440 transitions. [2018-09-26 21:19:26,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-26 21:19:26,463 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 237 [2018-09-26 21:19:26,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:26,464 INFO L225 Difference]: With dead ends: 436 [2018-09-26 21:19:26,464 INFO L226 Difference]: Without dead ends: 241 [2018-09-26 21:19:26,466 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3197 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=4701, Invalid=15605, Unknown=0, NotChecked=0, Total=20306 [2018-09-26 21:19:26,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2018-09-26 21:19:26,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2018-09-26 21:19:26,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2018-09-26 21:19:26,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 243 transitions. [2018-09-26 21:19:26,489 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 243 transitions. Word has length 237 [2018-09-26 21:19:26,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:26,490 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 243 transitions. [2018-09-26 21:19:26,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-26 21:19:26,490 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 243 transitions. [2018-09-26 21:19:26,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-09-26 21:19:26,490 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:26,491 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 47, 46, 46, 1, 1, 1, 1, 1] [2018-09-26 21:19:26,491 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:26,491 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:26,491 INFO L82 PathProgramCache]: Analyzing trace with hash 125264706, now seen corresponding path program 92 times [2018-09-26 21:19:26,491 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:26,491 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:26,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:26,492 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:19:26,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:26,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:27,514 INFO L134 CoverageAnalysis]: Checked inductivity of 5452 backedges. 1220 proven. 4232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:19:27,515 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:27,515 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:19:27,522 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:19:27,633 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:19:27,633 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:19:27,638 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:19:27,700 INFO L134 CoverageAnalysis]: Checked inductivity of 5452 backedges. 1220 proven. 4232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:19:27,723 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:27,723 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-26 21:19:27,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-26 21:19:27,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-26 21:19:27,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-26 21:19:27,724 INFO L87 Difference]: Start difference. First operand 241 states and 243 transitions. Second operand 50 states. [2018-09-26 21:19:28,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:28,078 INFO L93 Difference]: Finished difference Result 255 states and 258 transitions. [2018-09-26 21:19:28,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-26 21:19:28,080 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 238 [2018-09-26 21:19:28,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:28,081 INFO L225 Difference]: With dead ends: 255 [2018-09-26 21:19:28,081 INFO L226 Difference]: Without dead ends: 249 [2018-09-26 21:19:28,081 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-26 21:19:28,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2018-09-26 21:19:28,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 245. [2018-09-26 21:19:28,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2018-09-26 21:19:28,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 247 transitions. [2018-09-26 21:19:28,109 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 247 transitions. Word has length 238 [2018-09-26 21:19:28,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:28,110 INFO L480 AbstractCegarLoop]: Abstraction has 245 states and 247 transitions. [2018-09-26 21:19:28,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-26 21:19:28,110 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 247 transitions. [2018-09-26 21:19:28,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2018-09-26 21:19:28,111 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:28,111 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 47, 47, 47, 1, 1, 1, 1, 1] [2018-09-26 21:19:28,111 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:28,112 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:28,112 INFO L82 PathProgramCache]: Analyzing trace with hash 494724536, now seen corresponding path program 93 times [2018-09-26 21:19:28,112 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:28,112 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:28,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:28,113 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:19:28,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:28,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:31,097 INFO L134 CoverageAnalysis]: Checked inductivity of 5640 backedges. 4512 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:19:31,097 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:31,097 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:19:31,106 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:19:31,306 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-09-26 21:19:31,306 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:19:31,311 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:19:31,359 INFO L134 CoverageAnalysis]: Checked inductivity of 5640 backedges. 4512 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:19:31,380 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:31,380 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-09-26 21:19:31,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-26 21:19:31,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-26 21:19:31,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2449, Invalid=7057, Unknown=0, NotChecked=0, Total=9506 [2018-09-26 21:19:31,382 INFO L87 Difference]: Start difference. First operand 245 states and 247 transitions. Second operand 98 states. [2018-09-26 21:19:34,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:34,815 INFO L93 Difference]: Finished difference Result 445 states and 449 transitions. [2018-09-26 21:19:34,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-26 21:19:34,815 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 242 [2018-09-26 21:19:34,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:34,816 INFO L225 Difference]: With dead ends: 445 [2018-09-26 21:19:34,816 INFO L226 Difference]: Without dead ends: 246 [2018-09-26 21:19:34,817 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3337 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=4897, Invalid=16273, Unknown=0, NotChecked=0, Total=21170 [2018-09-26 21:19:34,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2018-09-26 21:19:34,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 246. [2018-09-26 21:19:34,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2018-09-26 21:19:34,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 248 transitions. [2018-09-26 21:19:34,851 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 248 transitions. Word has length 242 [2018-09-26 21:19:34,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:34,851 INFO L480 AbstractCegarLoop]: Abstraction has 246 states and 248 transitions. [2018-09-26 21:19:34,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-26 21:19:34,852 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 248 transitions. [2018-09-26 21:19:34,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-09-26 21:19:34,853 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:34,853 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 48, 47, 47, 1, 1, 1, 1, 1] [2018-09-26 21:19:34,853 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:34,853 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:34,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1883780879, now seen corresponding path program 94 times [2018-09-26 21:19:34,854 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:34,854 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:34,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:34,854 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:19:34,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:34,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:36,122 INFO L134 CoverageAnalysis]: Checked inductivity of 5688 backedges. 1270 proven. 4418 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:19:36,122 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:36,123 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:19:36,131 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:19:36,253 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:19:36,254 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:19:36,263 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:19:36,312 INFO L134 CoverageAnalysis]: Checked inductivity of 5688 backedges. 1270 proven. 4418 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:19:36,332 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:36,332 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-26 21:19:36,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-26 21:19:36,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-26 21:19:36,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-26 21:19:36,333 INFO L87 Difference]: Start difference. First operand 246 states and 248 transitions. Second operand 51 states. [2018-09-26 21:19:36,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:36,690 INFO L93 Difference]: Finished difference Result 260 states and 263 transitions. [2018-09-26 21:19:36,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-26 21:19:36,691 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 243 [2018-09-26 21:19:36,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:36,692 INFO L225 Difference]: With dead ends: 260 [2018-09-26 21:19:36,692 INFO L226 Difference]: Without dead ends: 254 [2018-09-26 21:19:36,692 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-26 21:19:36,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2018-09-26 21:19:36,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 250. [2018-09-26 21:19:36,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2018-09-26 21:19:36,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 252 transitions. [2018-09-26 21:19:36,718 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 252 transitions. Word has length 243 [2018-09-26 21:19:36,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:36,718 INFO L480 AbstractCegarLoop]: Abstraction has 250 states and 252 transitions. [2018-09-26 21:19:36,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-26 21:19:36,718 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 252 transitions. [2018-09-26 21:19:36,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2018-09-26 21:19:36,719 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:36,719 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 48, 48, 48, 1, 1, 1, 1, 1] [2018-09-26 21:19:36,719 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:36,719 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:36,719 INFO L82 PathProgramCache]: Analyzing trace with hash 514120679, now seen corresponding path program 95 times [2018-09-26 21:19:36,719 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:36,720 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:36,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:36,720 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:19:36,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:36,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:39,465 INFO L134 CoverageAnalysis]: Checked inductivity of 5880 backedges. 4704 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:19:39,466 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:39,466 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:19:39,501 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:19:39,677 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-09-26 21:19:39,677 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:19:39,683 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:19:39,734 INFO L134 CoverageAnalysis]: Checked inductivity of 5880 backedges. 4704 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:19:39,756 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:39,756 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-09-26 21:19:39,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-26 21:19:39,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-26 21:19:39,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2549, Invalid=7351, Unknown=0, NotChecked=0, Total=9900 [2018-09-26 21:19:39,757 INFO L87 Difference]: Start difference. First operand 250 states and 252 transitions. Second operand 100 states. [2018-09-26 21:19:43,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:43,704 INFO L93 Difference]: Finished difference Result 454 states and 458 transitions. [2018-09-26 21:19:43,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-09-26 21:19:43,704 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 247 [2018-09-26 21:19:43,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:43,705 INFO L225 Difference]: With dead ends: 454 [2018-09-26 21:19:43,705 INFO L226 Difference]: Without dead ends: 251 [2018-09-26 21:19:43,706 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3480 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=5097, Invalid=16955, Unknown=0, NotChecked=0, Total=22052 [2018-09-26 21:19:43,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2018-09-26 21:19:43,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2018-09-26 21:19:43,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2018-09-26 21:19:43,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 253 transitions. [2018-09-26 21:19:43,734 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 253 transitions. Word has length 247 [2018-09-26 21:19:43,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:43,734 INFO L480 AbstractCegarLoop]: Abstraction has 251 states and 253 transitions. [2018-09-26 21:19:43,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-26 21:19:43,734 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 253 transitions. [2018-09-26 21:19:43,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2018-09-26 21:19:43,735 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:43,735 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 49, 48, 48, 1, 1, 1, 1, 1] [2018-09-26 21:19:43,735 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:43,735 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:43,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1107028914, now seen corresponding path program 96 times [2018-09-26 21:19:43,736 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:43,736 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:43,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:43,736 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:19:43,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:43,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:44,834 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 1321 proven. 4608 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:19:44,835 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:44,835 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:19:44,843 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:19:45,027 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-26 21:19:45,027 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:19:45,033 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:19:45,083 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 1321 proven. 4608 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:19:45,104 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:45,104 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-26 21:19:45,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-26 21:19:45,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-26 21:19:45,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-26 21:19:45,105 INFO L87 Difference]: Start difference. First operand 251 states and 253 transitions. Second operand 52 states. [2018-09-26 21:19:45,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:45,456 INFO L93 Difference]: Finished difference Result 265 states and 268 transitions. [2018-09-26 21:19:45,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-26 21:19:45,457 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 248 [2018-09-26 21:19:45,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:45,458 INFO L225 Difference]: With dead ends: 265 [2018-09-26 21:19:45,458 INFO L226 Difference]: Without dead ends: 259 [2018-09-26 21:19:45,458 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-26 21:19:45,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2018-09-26 21:19:45,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 255. [2018-09-26 21:19:45,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2018-09-26 21:19:45,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 257 transitions. [2018-09-26 21:19:45,485 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 257 transitions. Word has length 248 [2018-09-26 21:19:45,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:45,485 INFO L480 AbstractCegarLoop]: Abstraction has 255 states and 257 transitions. [2018-09-26 21:19:45,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-26 21:19:45,485 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 257 transitions. [2018-09-26 21:19:45,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2018-09-26 21:19:45,486 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:45,486 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 49, 49, 49, 1, 1, 1, 1, 1] [2018-09-26 21:19:45,486 INFO L423 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:45,487 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:45,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1827811524, now seen corresponding path program 97 times [2018-09-26 21:19:45,487 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:45,487 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:45,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:45,488 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:19:45,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:45,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:48,712 INFO L134 CoverageAnalysis]: Checked inductivity of 6125 backedges. 4900 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:19:48,712 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:48,712 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:19:48,720 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:19:48,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:48,848 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:19:48,900 INFO L134 CoverageAnalysis]: Checked inductivity of 6125 backedges. 4900 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:19:48,922 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:48,922 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-09-26 21:19:48,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-26 21:19:48,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-26 21:19:48,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2651, Invalid=7651, Unknown=0, NotChecked=0, Total=10302 [2018-09-26 21:19:48,924 INFO L87 Difference]: Start difference. First operand 255 states and 257 transitions. Second operand 102 states. [2018-09-26 21:19:52,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:52,289 INFO L93 Difference]: Finished difference Result 463 states and 467 transitions. [2018-09-26 21:19:52,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-09-26 21:19:52,289 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 252 [2018-09-26 21:19:52,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:52,290 INFO L225 Difference]: With dead ends: 463 [2018-09-26 21:19:52,290 INFO L226 Difference]: Without dead ends: 256 [2018-09-26 21:19:52,291 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3626 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=5301, Invalid=17651, Unknown=0, NotChecked=0, Total=22952 [2018-09-26 21:19:52,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2018-09-26 21:19:52,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2018-09-26 21:19:52,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2018-09-26 21:19:52,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 258 transitions. [2018-09-26 21:19:52,319 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 258 transitions. Word has length 252 [2018-09-26 21:19:52,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:52,319 INFO L480 AbstractCegarLoop]: Abstraction has 256 states and 258 transitions. [2018-09-26 21:19:52,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-26 21:19:52,320 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 258 transitions. [2018-09-26 21:19:52,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2018-09-26 21:19:52,321 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:52,321 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 50, 49, 49, 1, 1, 1, 1, 1] [2018-09-26 21:19:52,321 INFO L423 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:52,321 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:52,321 INFO L82 PathProgramCache]: Analyzing trace with hash -803659587, now seen corresponding path program 98 times [2018-09-26 21:19:52,321 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:52,322 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:52,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:52,322 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:19:52,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:52,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:53,576 INFO L134 CoverageAnalysis]: Checked inductivity of 6175 backedges. 1373 proven. 4802 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:19:53,577 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:53,577 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:19:53,586 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:19:53,707 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:19:53,707 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:19:53,713 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:19:53,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6175 backedges. 1373 proven. 4802 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:19:53,781 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:53,781 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-26 21:19:53,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-26 21:19:53,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-26 21:19:53,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-26 21:19:53,782 INFO L87 Difference]: Start difference. First operand 256 states and 258 transitions. Second operand 53 states. [2018-09-26 21:19:54,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:54,117 INFO L93 Difference]: Finished difference Result 270 states and 273 transitions. [2018-09-26 21:19:54,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-26 21:19:54,117 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 253 [2018-09-26 21:19:54,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:54,118 INFO L225 Difference]: With dead ends: 270 [2018-09-26 21:19:54,118 INFO L226 Difference]: Without dead ends: 264 [2018-09-26 21:19:54,119 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-26 21:19:54,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2018-09-26 21:19:54,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 260. [2018-09-26 21:19:54,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2018-09-26 21:19:54,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 262 transitions. [2018-09-26 21:19:54,154 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 262 transitions. Word has length 253 [2018-09-26 21:19:54,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:54,154 INFO L480 AbstractCegarLoop]: Abstraction has 260 states and 262 transitions. [2018-09-26 21:19:54,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-26 21:19:54,154 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 262 transitions. [2018-09-26 21:19:54,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2018-09-26 21:19:54,155 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:54,155 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 50, 50, 50, 1, 1, 1, 1, 1] [2018-09-26 21:19:54,155 INFO L423 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:54,156 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:54,156 INFO L82 PathProgramCache]: Analyzing trace with hash 465399219, now seen corresponding path program 99 times [2018-09-26 21:19:54,156 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:54,156 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:54,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:54,156 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:19:54,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:54,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:57,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6375 backedges. 5100 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:19:57,562 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:57,562 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:19:57,569 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:19:57,783 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2018-09-26 21:19:57,784 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:19:57,789 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:19:57,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6375 backedges. 5100 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:19:57,858 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:57,858 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-09-26 21:19:57,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-26 21:19:57,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-26 21:19:57,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2755, Invalid=7957, Unknown=0, NotChecked=0, Total=10712 [2018-09-26 21:19:57,860 INFO L87 Difference]: Start difference. First operand 260 states and 262 transitions. Second operand 104 states. [2018-09-26 21:20:01,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:01,814 INFO L93 Difference]: Finished difference Result 472 states and 476 transitions. [2018-09-26 21:20:01,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-09-26 21:20:01,814 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 257 [2018-09-26 21:20:01,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:01,815 INFO L225 Difference]: With dead ends: 472 [2018-09-26 21:20:01,815 INFO L226 Difference]: Without dead ends: 261 [2018-09-26 21:20:01,816 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3775 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=5509, Invalid=18361, Unknown=0, NotChecked=0, Total=23870 [2018-09-26 21:20:01,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2018-09-26 21:20:01,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2018-09-26 21:20:01,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2018-09-26 21:20:01,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 263 transitions. [2018-09-26 21:20:01,843 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 263 transitions. Word has length 257 [2018-09-26 21:20:01,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:01,843 INFO L480 AbstractCegarLoop]: Abstraction has 261 states and 263 transitions. [2018-09-26 21:20:01,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-26 21:20:01,843 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 263 transitions. [2018-09-26 21:20:01,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-09-26 21:20:01,844 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:01,844 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 51, 50, 50, 1, 1, 1, 1, 1] [2018-09-26 21:20:01,844 INFO L423 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:01,844 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:01,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1064997210, now seen corresponding path program 100 times [2018-09-26 21:20:01,845 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:01,845 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:01,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:01,846 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:01,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:01,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:02,983 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 1426 proven. 5000 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:02,984 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:02,984 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:20:02,991 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:20:03,119 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:20:03,119 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:03,130 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:03,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 1426 proven. 5000 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:03,203 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:03,204 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-26 21:20:03,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-26 21:20:03,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-26 21:20:03,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-26 21:20:03,205 INFO L87 Difference]: Start difference. First operand 261 states and 263 transitions. Second operand 54 states. [2018-09-26 21:20:03,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:03,536 INFO L93 Difference]: Finished difference Result 275 states and 278 transitions. [2018-09-26 21:20:03,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-26 21:20:03,537 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 258 [2018-09-26 21:20:03,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:03,537 INFO L225 Difference]: With dead ends: 275 [2018-09-26 21:20:03,537 INFO L226 Difference]: Without dead ends: 269 [2018-09-26 21:20:03,538 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-26 21:20:03,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2018-09-26 21:20:03,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 265. [2018-09-26 21:20:03,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2018-09-26 21:20:03,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 267 transitions. [2018-09-26 21:20:03,566 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 267 transitions. Word has length 258 [2018-09-26 21:20:03,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:03,566 INFO L480 AbstractCegarLoop]: Abstraction has 265 states and 267 transitions. [2018-09-26 21:20:03,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-26 21:20:03,567 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 267 transitions. [2018-09-26 21:20:03,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2018-09-26 21:20:03,567 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:03,567 INFO L375 BasicCegarLoop]: trace histogram [52, 52, 51, 51, 51, 1, 1, 1, 1, 1] [2018-09-26 21:20:03,568 INFO L423 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:03,568 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:03,568 INFO L82 PathProgramCache]: Analyzing trace with hash 629884880, now seen corresponding path program 101 times [2018-09-26 21:20:03,568 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:03,568 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:03,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:03,569 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:03,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:03,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:07,064 INFO L134 CoverageAnalysis]: Checked inductivity of 6630 backedges. 5304 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:07,064 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:07,064 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:20:07,072 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:20:07,401 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2018-09-26 21:20:07,401 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:07,408 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:07,484 INFO L134 CoverageAnalysis]: Checked inductivity of 6630 backedges. 5304 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:07,516 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:07,516 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-09-26 21:20:07,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-26 21:20:07,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-26 21:20:07,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2861, Invalid=8269, Unknown=0, NotChecked=0, Total=11130 [2018-09-26 21:20:07,518 INFO L87 Difference]: Start difference. First operand 265 states and 267 transitions. Second operand 106 states. [2018-09-26 21:20:11,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:11,484 INFO L93 Difference]: Finished difference Result 481 states and 485 transitions. [2018-09-26 21:20:11,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-09-26 21:20:11,485 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 262 [2018-09-26 21:20:11,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:11,485 INFO L225 Difference]: With dead ends: 481 [2018-09-26 21:20:11,485 INFO L226 Difference]: Without dead ends: 266 [2018-09-26 21:20:11,487 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3927 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=5721, Invalid=19085, Unknown=0, NotChecked=0, Total=24806 [2018-09-26 21:20:11,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2018-09-26 21:20:11,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 266. [2018-09-26 21:20:11,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2018-09-26 21:20:11,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 268 transitions. [2018-09-26 21:20:11,523 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 268 transitions. Word has length 262 [2018-09-26 21:20:11,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:11,523 INFO L480 AbstractCegarLoop]: Abstraction has 266 states and 268 transitions. [2018-09-26 21:20:11,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-26 21:20:11,523 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 268 transitions. [2018-09-26 21:20:11,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2018-09-26 21:20:11,524 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:11,524 INFO L375 BasicCegarLoop]: trace histogram [52, 52, 52, 51, 51, 1, 1, 1, 1, 1] [2018-09-26 21:20:11,524 INFO L423 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:11,525 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:11,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1501211511, now seen corresponding path program 102 times [2018-09-26 21:20:11,525 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:11,525 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:11,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:11,526 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:11,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:11,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:12,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6682 backedges. 1480 proven. 5202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:12,937 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:12,937 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:20:12,944 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:20:13,150 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2018-09-26 21:20:13,150 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:13,156 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:13,221 INFO L134 CoverageAnalysis]: Checked inductivity of 6682 backedges. 1480 proven. 5202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:13,243 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:13,243 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-26 21:20:13,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-26 21:20:13,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-26 21:20:13,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-26 21:20:13,244 INFO L87 Difference]: Start difference. First operand 266 states and 268 transitions. Second operand 55 states. [2018-09-26 21:20:13,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:13,574 INFO L93 Difference]: Finished difference Result 280 states and 283 transitions. [2018-09-26 21:20:13,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-26 21:20:13,575 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 263 [2018-09-26 21:20:13,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:13,575 INFO L225 Difference]: With dead ends: 280 [2018-09-26 21:20:13,576 INFO L226 Difference]: Without dead ends: 274 [2018-09-26 21:20:13,576 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-26 21:20:13,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2018-09-26 21:20:13,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 270. [2018-09-26 21:20:13,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2018-09-26 21:20:13,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 272 transitions. [2018-09-26 21:20:13,607 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 272 transitions. Word has length 263 [2018-09-26 21:20:13,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:13,607 INFO L480 AbstractCegarLoop]: Abstraction has 270 states and 272 transitions. [2018-09-26 21:20:13,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-26 21:20:13,607 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 272 transitions. [2018-09-26 21:20:13,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2018-09-26 21:20:13,608 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:13,608 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 52, 52, 52, 1, 1, 1, 1, 1] [2018-09-26 21:20:13,608 INFO L423 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:13,608 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:13,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1240278145, now seen corresponding path program 103 times [2018-09-26 21:20:13,609 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:13,609 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:13,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:13,609 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:13,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:13,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-09-26 21:20:16,211 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-26 21:20:16,215 WARN L206 ceAbstractionStarter]: Timeout [2018-09-26 21:20:16,215 INFO L202 PluginConnector]: Adding new model down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.09 09:20:16 BoogieIcfgContainer [2018-09-26 21:20:16,216 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-26 21:20:16,216 INFO L168 Benchmark]: Toolchain (without parser) took 233939.34 ms. Allocated memory was 1.5 GB in the beginning and 1.9 GB in the end (delta: 371.7 MB). Free memory was 1.5 GB in the beginning and 1.7 GB in the end (delta: -235.9 MB). Peak memory consumption was 135.8 MB. Max. memory is 7.1 GB. [2018-09-26 21:20:16,217 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-26 21:20:16,218 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-26 21:20:16,218 INFO L168 Benchmark]: Boogie Preprocessor took 26.01 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. [2018-09-26 21:20:16,218 INFO L168 Benchmark]: RCFGBuilder took 338.98 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-26 21:20:16,219 INFO L168 Benchmark]: TraceAbstraction took 233524.45 ms. Allocated memory was 1.5 GB in the beginning and 1.9 GB in the end (delta: 371.7 MB). Free memory was 1.5 GB in the beginning and 1.7 GB in the end (delta: -257.1 MB). Peak memory consumption was 114.6 MB. Max. memory is 7.1 GB. [2018-09-26 21:20:16,221 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 43.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 26.01 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 338.98 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 233524.45 ms. Allocated memory was 1.5 GB in the beginning and 1.9 GB in the end (delta: 371.7 MB). Free memory was 1.5 GB in the beginning and 1.7 GB in the end (delta: -257.1 MB). Peak memory consumption was 114.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 76]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 76). Cancelled while BasicCegarLoop was analyzing trace of length 268 with TraceHistMax 53, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 96 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 10 locations, 1 error locations. TIMEOUT Result, 233.4s OverallTime, 107 OverallIterations, 53 TraceHistogramMax, 106.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3194 SDtfs, 7615 SDslu, 71015 SDs, 0 SdLazy, 76431 SolverSat, 1656 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 46.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 20925 GetRequests, 15357 SyntacticMatches, 0 SemanticMatches, 5568 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68952 ImplicationChecksByTransitivity, 141.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=270occurred in iteration=106, 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: 1.6s AutomataMinimizationTime, 106 MinimizatonAttempts, 214 StatesRemovedByMinimization, 54 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.6s SsaConstructionTime, 9.0s SatisfiabilityAnalysisTime, 105.7s InterpolantComputationTime, 28080 NumberOfCodeBlocks, 28080 NumberOfCodeBlocksAsserted, 1602 NumberOfCheckSat, 27872 ConstructedInterpolants, 0 QuantifiedInterpolants, 14523584 SizeOfPredicates, 204 NumberOfNonLiveVariables, 44727 ConjunctsInSsa, 5661 ConjunctsInUnsatCore, 208 InterpolantComputations, 4 PerfectInterpolantSequences, 242320/471276 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/down.i_4.bplTransformedIcfg_BEv2_5.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-26_21-20-16-231.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/down.i_4.bplTransformedIcfg_BEv2_5.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-26_21-20-16-231.csv Completed graceful shutdown