java -Xmx8000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --generate-csv --csv-dir csv -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/seq_true-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-23 23:39:31,669 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-23 23:39:31,671 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-23 23:39:31,682 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-23 23:39:31,683 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-23 23:39:31,684 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-23 23:39:31,685 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-23 23:39:31,687 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-23 23:39:31,689 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-23 23:39:31,690 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-23 23:39:31,691 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-23 23:39:31,691 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-23 23:39:31,692 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-23 23:39:31,693 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-23 23:39:31,694 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-23 23:39:31,694 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-23 23:39:31,695 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-23 23:39:31,697 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-23 23:39:31,699 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-23 23:39:31,701 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-23 23:39:31,702 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-23 23:39:31,703 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-23 23:39:31,705 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-23 23:39:31,706 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-23 23:39:31,706 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-23 23:39:31,707 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-23 23:39:31,708 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-23 23:39:31,708 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-23 23:39:31,709 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-23 23:39:31,710 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-23 23:39:31,711 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-23 23:39:31,711 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-07-23 23:39:31,712 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-07-23 23:39:31,712 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-07-23 23:39:31,713 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-07-23 23:39:31,713 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-07-23 23:39:31,714 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-07-23 23:39:31,730 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-23 23:39:31,730 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-23 23:39:31,732 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-23 23:39:31,732 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-07-23 23:39:31,733 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-07-23 23:39:31,733 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-07-23 23:39:31,733 INFO L133 SettingsManager]: * Use SBE=true [2018-07-23 23:39:31,733 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-23 23:39:31,734 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-23 23:39:31,734 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-23 23:39:31,734 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-23 23:39:31,734 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-23 23:39:31,735 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-23 23:39:31,736 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-23 23:39:31,736 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-23 23:39:31,736 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-23 23:39:31,736 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-23 23:39:31,736 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-23 23:39:31,737 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-23 23:39:31,737 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-23 23:39:31,737 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-23 23:39:31,737 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-23 23:39:31,739 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-23 23:39:31,740 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-07-23 23:39:31,740 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-23 23:39:31,740 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-23 23:39:31,740 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-23 23:39:31,740 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-23 23:39:31,793 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-23 23:39:31,807 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-23 23:39:31,813 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-23 23:39:31,816 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-23 23:39:31,817 INFO L276 PluginConnector]: CDTParser initialized [2018-07-23 23:39:31,818 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/seq_true-unreach-call_true-termination.i [2018-07-23 23:39:32,149 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32228e81b/b08f41270f5e4973b5a86f86d870429b/FLAGf248f52f5 [2018-07-23 23:39:32,299 INFO L276 CDTParser]: Found 1 translation units. [2018-07-23 23:39:32,300 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/seq_true-unreach-call_true-termination.i [2018-07-23 23:39:32,306 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32228e81b/b08f41270f5e4973b5a86f86d870429b/FLAGf248f52f5 [2018-07-23 23:39:32,319 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32228e81b/b08f41270f5e4973b5a86f86d870429b [2018-07-23 23:39:32,328 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-23 23:39:32,330 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-23 23:39:32,331 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-23 23:39:32,331 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-23 23:39:32,337 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-23 23:39:32,338 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 11:39:32" (1/1) ... [2018-07-23 23:39:32,342 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f4b242b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:39:32, skipping insertion in model container [2018-07-23 23:39:32,342 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 11:39:32" (1/1) ... [2018-07-23 23:39:32,520 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-23 23:39:32,567 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-23 23:39:32,582 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-23 23:39:32,589 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-23 23:39:32,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:39:32 WrapperNode [2018-07-23 23:39:32,606 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-23 23:39:32,607 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-23 23:39:32,607 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-23 23:39:32,607 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-23 23:39:32,616 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:39:32" (1/1) ... [2018-07-23 23:39:32,623 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:39:32" (1/1) ... [2018-07-23 23:39:32,642 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-23 23:39:32,642 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-23 23:39:32,642 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-23 23:39:32,643 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-23 23:39:32,652 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:39:32" (1/1) ... [2018-07-23 23:39:32,652 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:39:32" (1/1) ... [2018-07-23 23:39:32,653 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:39:32" (1/1) ... [2018-07-23 23:39:32,654 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:39:32" (1/1) ... [2018-07-23 23:39:32,657 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:39:32" (1/1) ... [2018-07-23 23:39:32,663 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:39:32" (1/1) ... [2018-07-23 23:39:32,664 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:39:32" (1/1) ... [2018-07-23 23:39:32,666 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-23 23:39:32,666 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-23 23:39:32,666 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-23 23:39:32,667 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-23 23:39:32,667 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:39:32" (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 [2018-07-23 23:39:32,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-23 23:39:32,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-23 23:39:33,076 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-23 23:39:33,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 11:39:33 BoogieIcfgContainer [2018-07-23 23:39:33,081 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-23 23:39:33,083 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-23 23:39:33,083 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-23 23:39:33,095 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-23 23:39:33,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.07 11:39:32" (1/3) ... [2018-07-23 23:39:33,097 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1876df30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 11:39:33, skipping insertion in model container [2018-07-23 23:39:33,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:39:32" (2/3) ... [2018-07-23 23:39:33,098 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1876df30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 11:39:33, skipping insertion in model container [2018-07-23 23:39:33,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 11:39:33" (3/3) ... [2018-07-23 23:39:33,105 INFO L112 eAbstractionObserver]: Analyzing ICFG seq_true-unreach-call_true-termination.i [2018-07-23 23:39:33,117 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-23 23:39:33,127 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-23 23:39:33,178 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-23 23:39:33,179 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-23 23:39:33,179 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-23 23:39:33,180 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-23 23:39:33,180 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-23 23:39:33,180 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-23 23:39:33,180 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-23 23:39:33,180 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-23 23:39:33,181 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-23 23:39:33,198 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2018-07-23 23:39:33,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-07-23 23:39:33,207 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:39:33,208 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:39:33,208 INFO L414 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:39:33,214 INFO L82 PathProgramCache]: Analyzing trace with hash 421693396, now seen corresponding path program 1 times [2018-07-23 23:39:33,215 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:39:33,216 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:39:33,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:33,259 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:39:33,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:33,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:39:33,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:33,325 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-23 23:39:33,325 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-07-23 23:39:33,330 INFO L450 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-07-23 23:39:33,343 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-07-23 23:39:33,343 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-07-23 23:39:33,346 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2018-07-23 23:39:33,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:39:33,361 INFO L93 Difference]: Finished difference Result 32 states and 44 transitions. [2018-07-23 23:39:33,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-07-23 23:39:33,363 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2018-07-23 23:39:33,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:39:33,373 INFO L225 Difference]: With dead ends: 32 [2018-07-23 23:39:33,373 INFO L226 Difference]: Without dead ends: 16 [2018-07-23 23:39:33,377 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-07-23 23:39:33,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-07-23 23:39:33,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-07-23 23:39:33,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-07-23 23:39:33,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2018-07-23 23:39:33,414 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2018-07-23 23:39:33,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:39:33,414 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2018-07-23 23:39:33,415 INFO L472 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-07-23 23:39:33,415 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2018-07-23 23:39:33,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-07-23 23:39:33,415 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:39:33,416 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:39:33,416 INFO L414 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:39:33,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1032572958, now seen corresponding path program 1 times [2018-07-23 23:39:33,416 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:39:33,417 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:39:33,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:33,418 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:39:33,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:33,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:39:33,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:33,610 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-23 23:39:33,611 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-07-23 23:39:33,612 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-23 23:39:33,613 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-23 23:39:33,613 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-07-23 23:39:33,613 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 7 states. [2018-07-23 23:39:34,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:39:34,234 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2018-07-23 23:39:34,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-23 23:39:34,235 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2018-07-23 23:39:34,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:39:34,236 INFO L225 Difference]: With dead ends: 39 [2018-07-23 23:39:34,236 INFO L226 Difference]: Without dead ends: 30 [2018-07-23 23:39:34,238 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2018-07-23 23:39:34,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-07-23 23:39:34,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 21. [2018-07-23 23:39:34,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-07-23 23:39:34,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2018-07-23 23:39:34,243 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 14 [2018-07-23 23:39:34,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:39:34,244 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2018-07-23 23:39:34,244 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-23 23:39:34,244 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2018-07-23 23:39:34,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-07-23 23:39:34,245 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:39:34,245 INFO L353 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:39:34,246 INFO L414 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:39:34,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1225079528, now seen corresponding path program 1 times [2018-07-23 23:39:34,246 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:39:34,246 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:39:34,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:34,248 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:39:34,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:34,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:39:34,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:34,328 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-23 23:39:34,328 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-07-23 23:39:34,328 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-23 23:39:34,329 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-23 23:39:34,329 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-07-23 23:39:34,329 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 5 states. [2018-07-23 23:39:34,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:39:34,430 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2018-07-23 23:39:34,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-23 23:39:34,433 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2018-07-23 23:39:34,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:39:34,434 INFO L225 Difference]: With dead ends: 33 [2018-07-23 23:39:34,434 INFO L226 Difference]: Without dead ends: 31 [2018-07-23 23:39:34,435 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-07-23 23:39:34,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-07-23 23:39:34,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2018-07-23 23:39:34,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-07-23 23:39:34,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2018-07-23 23:39:34,441 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 16 [2018-07-23 23:39:34,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:39:34,441 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2018-07-23 23:39:34,441 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-23 23:39:34,441 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2018-07-23 23:39:34,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-07-23 23:39:34,442 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:39:34,442 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:39:34,443 INFO L414 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:39:34,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1940651039, now seen corresponding path program 1 times [2018-07-23 23:39:34,443 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:39:34,444 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:39:34,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:34,445 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:39:34,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:34,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:39:34,672 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:34,672 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:39:34,672 INFO L221 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 [2018-07-23 23:39:34,682 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:39:34,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:39:34,711 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:39:34,978 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:35,002 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:39:35,002 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2018-07-23 23:39:35,003 INFO L450 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-07-23 23:39:35,004 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-07-23 23:39:35,004 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2018-07-23 23:39:35,005 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 14 states. [2018-07-23 23:39:35,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:39:35,621 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2018-07-23 23:39:35,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-07-23 23:39:35,622 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 20 [2018-07-23 23:39:35,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:39:35,623 INFO L225 Difference]: With dead ends: 51 [2018-07-23 23:39:35,623 INFO L226 Difference]: Without dead ends: 38 [2018-07-23 23:39:35,624 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2018-07-23 23:39:35,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-07-23 23:39:35,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 26. [2018-07-23 23:39:35,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-07-23 23:39:35,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2018-07-23 23:39:35,630 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 20 [2018-07-23 23:39:35,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:39:35,631 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2018-07-23 23:39:35,631 INFO L472 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-07-23 23:39:35,631 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2018-07-23 23:39:35,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-07-23 23:39:35,632 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:39:35,632 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:39:35,632 INFO L414 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:39:35,632 INFO L82 PathProgramCache]: Analyzing trace with hash -816692883, now seen corresponding path program 1 times [2018-07-23 23:39:35,633 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:39:35,633 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:39:35,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:35,634 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:39:35,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:35,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:39:35,759 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:35,760 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:39:35,760 INFO L221 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 [2018-07-23 23:39:35,779 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:39:35,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:39:35,811 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:39:35,926 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:35,947 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:39:35,948 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2018-07-23 23:39:35,948 INFO L450 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-07-23 23:39:35,948 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-07-23 23:39:35,949 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2018-07-23 23:39:35,949 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 13 states. [2018-07-23 23:39:36,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:39:36,272 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2018-07-23 23:39:36,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-07-23 23:39:36,273 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 20 [2018-07-23 23:39:36,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:39:36,274 INFO L225 Difference]: With dead ends: 68 [2018-07-23 23:39:36,274 INFO L226 Difference]: Without dead ends: 55 [2018-07-23 23:39:36,275 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2018-07-23 23:39:36,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-07-23 23:39:36,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 29. [2018-07-23 23:39:36,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-07-23 23:39:36,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2018-07-23 23:39:36,281 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 20 [2018-07-23 23:39:36,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:39:36,282 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2018-07-23 23:39:36,282 INFO L472 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-07-23 23:39:36,282 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2018-07-23 23:39:36,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-07-23 23:39:36,283 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:39:36,283 INFO L353 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:39:36,283 INFO L414 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:39:36,284 INFO L82 PathProgramCache]: Analyzing trace with hash -728640165, now seen corresponding path program 2 times [2018-07-23 23:39:36,284 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:39:36,284 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:39:36,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:36,285 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:39:36,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:36,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:39:36,609 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:36,609 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:39:36,610 INFO L221 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 [2018-07-23 23:39:36,618 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:39:36,631 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:39:36,631 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:39:36,633 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:39:36,771 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:36,793 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:39:36,793 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2018-07-23 23:39:36,794 INFO L450 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-07-23 23:39:36,794 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-07-23 23:39:36,794 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-07-23 23:39:36,794 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 8 states. [2018-07-23 23:39:36,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:39:36,943 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2018-07-23 23:39:36,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-07-23 23:39:36,944 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2018-07-23 23:39:36,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:39:36,945 INFO L225 Difference]: With dead ends: 42 [2018-07-23 23:39:36,945 INFO L226 Difference]: Without dead ends: 40 [2018-07-23 23:39:36,946 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2018-07-23 23:39:36,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-07-23 23:39:36,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2018-07-23 23:39:36,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-07-23 23:39:36,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2018-07-23 23:39:36,953 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 22 [2018-07-23 23:39:36,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:39:36,953 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2018-07-23 23:39:36,954 INFO L472 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-07-23 23:39:36,954 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2018-07-23 23:39:36,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-07-23 23:39:36,955 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:39:36,955 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:39:36,956 INFO L414 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:39:36,956 INFO L82 PathProgramCache]: Analyzing trace with hash -342672732, now seen corresponding path program 3 times [2018-07-23 23:39:36,956 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:39:36,956 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:39:36,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:36,957 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:39:36,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:36,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:39:37,116 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:37,117 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:39:37,117 INFO L221 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 [2018-07-23 23:39:37,126 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:39:37,147 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-07-23 23:39:37,147 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:39:37,151 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:39:37,420 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:37,442 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:39:37,442 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2018-07-23 23:39:37,443 INFO L450 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-07-23 23:39:37,443 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-07-23 23:39:37,444 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2018-07-23 23:39:37,444 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 18 states. [2018-07-23 23:39:37,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:39:37,712 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2018-07-23 23:39:37,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-07-23 23:39:37,712 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 26 [2018-07-23 23:39:37,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:39:37,713 INFO L225 Difference]: With dead ends: 70 [2018-07-23 23:39:37,713 INFO L226 Difference]: Without dead ends: 53 [2018-07-23 23:39:37,714 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=163, Invalid=487, Unknown=0, NotChecked=0, Total=650 [2018-07-23 23:39:37,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-07-23 23:39:37,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 35. [2018-07-23 23:39:37,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-07-23 23:39:37,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2018-07-23 23:39:37,721 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 26 [2018-07-23 23:39:37,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:39:37,721 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2018-07-23 23:39:37,721 INFO L472 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-07-23 23:39:37,721 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2018-07-23 23:39:37,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-07-23 23:39:37,722 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:39:37,722 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:39:37,723 INFO L414 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:39:37,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1108877104, now seen corresponding path program 1 times [2018-07-23 23:39:37,723 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:39:37,723 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:39:37,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:37,724 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:39:37,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:37,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:39:37,847 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:37,847 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:39:37,848 INFO L221 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 [2018-07-23 23:39:37,860 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:39:37,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:39:37,877 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:39:38,027 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:38,048 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:39:38,048 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2018-07-23 23:39:38,049 INFO L450 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-07-23 23:39:38,049 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-07-23 23:39:38,049 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2018-07-23 23:39:38,050 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 17 states. [2018-07-23 23:39:38,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:39:38,399 INFO L93 Difference]: Finished difference Result 88 states and 95 transitions. [2018-07-23 23:39:38,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-07-23 23:39:38,399 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 26 [2018-07-23 23:39:38,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:39:38,401 INFO L225 Difference]: With dead ends: 88 [2018-07-23 23:39:38,401 INFO L226 Difference]: Without dead ends: 71 [2018-07-23 23:39:38,402 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=171, Invalid=531, Unknown=0, NotChecked=0, Total=702 [2018-07-23 23:39:38,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-07-23 23:39:38,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 35. [2018-07-23 23:39:38,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-07-23 23:39:38,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2018-07-23 23:39:38,410 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 26 [2018-07-23 23:39:38,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:39:38,410 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2018-07-23 23:39:38,410 INFO L472 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-07-23 23:39:38,410 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2018-07-23 23:39:38,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-07-23 23:39:38,411 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:39:38,412 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:39:38,412 INFO L414 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:39:38,412 INFO L82 PathProgramCache]: Analyzing trace with hash 962901692, now seen corresponding path program 2 times [2018-07-23 23:39:38,412 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:39:38,412 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:39:38,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:38,413 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:39:38,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:38,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:39:38,533 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:38,534 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:39:38,534 INFO L221 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 [2018-07-23 23:39:38,549 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:39:38,572 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:39:38,572 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:39:38,574 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:39:38,729 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:38,750 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:39:38,750 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2018-07-23 23:39:38,751 INFO L450 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-07-23 23:39:38,751 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-07-23 23:39:38,751 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2018-07-23 23:39:38,752 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 16 states. [2018-07-23 23:39:39,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:39:39,022 INFO L93 Difference]: Finished difference Result 109 states and 118 transitions. [2018-07-23 23:39:39,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-07-23 23:39:39,022 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 26 [2018-07-23 23:39:39,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:39:39,023 INFO L225 Difference]: With dead ends: 109 [2018-07-23 23:39:39,023 INFO L226 Difference]: Without dead ends: 92 [2018-07-23 23:39:39,024 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=487, Unknown=0, NotChecked=0, Total=650 [2018-07-23 23:39:39,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-07-23 23:39:39,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 38. [2018-07-23 23:39:39,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-07-23 23:39:39,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2018-07-23 23:39:39,033 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 26 [2018-07-23 23:39:39,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:39:39,033 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2018-07-23 23:39:39,034 INFO L472 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-07-23 23:39:39,034 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2018-07-23 23:39:39,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-07-23 23:39:39,035 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:39:39,035 INFO L353 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:39:39,035 INFO L414 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:39:39,035 INFO L82 PathProgramCache]: Analyzing trace with hash 2116585630, now seen corresponding path program 4 times [2018-07-23 23:39:39,036 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:39:39,036 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:39:39,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:39,037 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:39:39,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:39,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:39:39,148 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:39,148 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:39:39,148 INFO L221 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 [2018-07-23 23:39:39,156 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:39:39,169 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:39:39,169 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:39:39,171 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:39:39,195 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:39,216 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:39:39,216 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2018-07-23 23:39:39,217 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-23 23:39:39,217 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-23 23:39:39,217 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-07-23 23:39:39,217 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 9 states. [2018-07-23 23:39:39,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:39:39,383 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2018-07-23 23:39:39,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-07-23 23:39:39,384 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2018-07-23 23:39:39,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:39:39,385 INFO L225 Difference]: With dead ends: 51 [2018-07-23 23:39:39,385 INFO L226 Difference]: Without dead ends: 49 [2018-07-23 23:39:39,385 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2018-07-23 23:39:39,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-07-23 23:39:39,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 42. [2018-07-23 23:39:39,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-07-23 23:39:39,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2018-07-23 23:39:39,395 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 28 [2018-07-23 23:39:39,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:39:39,395 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2018-07-23 23:39:39,395 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-23 23:39:39,396 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2018-07-23 23:39:39,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-07-23 23:39:39,397 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:39:39,397 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:39:39,397 INFO L414 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:39:39,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1203202969, now seen corresponding path program 5 times [2018-07-23 23:39:39,397 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:39:39,398 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:39:39,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:39,399 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:39:39,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:39,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:39:39,593 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:39,594 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:39:39,594 INFO L221 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 [2018-07-23 23:39:39,602 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:39:39,620 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-07-23 23:39:39,620 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:39:39,622 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:39:39,841 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:39,862 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:39:39,862 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2018-07-23 23:39:39,862 INFO L450 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-07-23 23:39:39,863 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-07-23 23:39:39,863 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2018-07-23 23:39:39,863 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand 22 states. [2018-07-23 23:39:40,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:39:40,465 INFO L93 Difference]: Finished difference Result 89 states and 96 transitions. [2018-07-23 23:39:40,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-07-23 23:39:40,465 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 32 [2018-07-23 23:39:40,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:39:40,466 INFO L225 Difference]: With dead ends: 89 [2018-07-23 23:39:40,466 INFO L226 Difference]: Without dead ends: 68 [2018-07-23 23:39:40,467 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=233, Invalid=759, Unknown=0, NotChecked=0, Total=992 [2018-07-23 23:39:40,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-07-23 23:39:40,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 44. [2018-07-23 23:39:40,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-07-23 23:39:40,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2018-07-23 23:39:40,477 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 32 [2018-07-23 23:39:40,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:39:40,478 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2018-07-23 23:39:40,478 INFO L472 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-07-23 23:39:40,478 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2018-07-23 23:39:40,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-07-23 23:39:40,479 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:39:40,479 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:39:40,479 INFO L414 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:39:40,480 INFO L82 PathProgramCache]: Analyzing trace with hash 377151475, now seen corresponding path program 2 times [2018-07-23 23:39:40,480 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:39:40,480 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:39:40,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:40,481 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:39:40,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:40,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:39:40,609 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:40,609 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:39:40,609 INFO L221 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 [2018-07-23 23:39:40,617 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:39:40,635 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:39:40,635 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:39:40,637 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:39:40,811 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:40,831 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:39:40,831 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2018-07-23 23:39:40,832 INFO L450 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-07-23 23:39:40,832 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-07-23 23:39:40,832 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2018-07-23 23:39:40,833 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand 21 states. [2018-07-23 23:39:41,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:39:41,612 INFO L93 Difference]: Finished difference Result 113 states and 121 transitions. [2018-07-23 23:39:41,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-07-23 23:39:41,612 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 32 [2018-07-23 23:39:41,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:39:41,613 INFO L225 Difference]: With dead ends: 113 [2018-07-23 23:39:41,613 INFO L226 Difference]: Without dead ends: 92 [2018-07-23 23:39:41,614 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=253, Invalid=869, Unknown=0, NotChecked=0, Total=1122 [2018-07-23 23:39:41,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-07-23 23:39:41,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 44. [2018-07-23 23:39:41,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-07-23 23:39:41,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2018-07-23 23:39:41,624 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 32 [2018-07-23 23:39:41,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:39:41,624 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2018-07-23 23:39:41,625 INFO L472 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-07-23 23:39:41,625 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2018-07-23 23:39:41,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-07-23 23:39:41,626 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:39:41,626 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:39:41,626 INFO L414 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:39:41,626 INFO L82 PathProgramCache]: Analyzing trace with hash 530751103, now seen corresponding path program 3 times [2018-07-23 23:39:41,626 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:39:41,626 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:39:41,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:41,627 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:39:41,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:41,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:39:42,523 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:42,524 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:39:42,524 INFO L221 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 [2018-07-23 23:39:42,532 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:39:42,600 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-07-23 23:39:42,601 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:39:42,603 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:39:42,769 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:42,790 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:39:42,790 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2018-07-23 23:39:42,790 INFO L450 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-07-23 23:39:42,791 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-07-23 23:39:42,791 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2018-07-23 23:39:42,791 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand 20 states. [2018-07-23 23:39:43,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:39:43,109 INFO L93 Difference]: Finished difference Result 135 states and 144 transitions. [2018-07-23 23:39:43,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-07-23 23:39:43,109 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 32 [2018-07-23 23:39:43,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:39:43,110 INFO L225 Difference]: With dead ends: 135 [2018-07-23 23:39:43,110 INFO L226 Difference]: Without dead ends: 114 [2018-07-23 23:39:43,111 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=253, Invalid=869, Unknown=0, NotChecked=0, Total=1122 [2018-07-23 23:39:43,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-07-23 23:39:43,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 44. [2018-07-23 23:39:43,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-07-23 23:39:43,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2018-07-23 23:39:43,123 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 32 [2018-07-23 23:39:43,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:39:43,123 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2018-07-23 23:39:43,123 INFO L472 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-07-23 23:39:43,124 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2018-07-23 23:39:43,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-07-23 23:39:43,124 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:39:43,124 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:39:43,125 INFO L414 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:39:43,125 INFO L82 PathProgramCache]: Analyzing trace with hash -394227701, now seen corresponding path program 3 times [2018-07-23 23:39:43,125 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:39:43,125 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:39:43,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:43,126 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:39:43,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:43,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:39:43,468 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:43,468 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:39:43,468 INFO L221 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 [2018-07-23 23:39:43,475 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:39:43,506 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-07-23 23:39:43,506 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:39:43,509 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:39:43,641 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:43,672 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:39:43,672 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2018-07-23 23:39:43,672 INFO L450 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-07-23 23:39:43,672 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-07-23 23:39:43,673 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2018-07-23 23:39:43,673 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand 19 states. [2018-07-23 23:39:44,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:39:44,291 INFO L93 Difference]: Finished difference Result 160 states and 171 transitions. [2018-07-23 23:39:44,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-07-23 23:39:44,291 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 32 [2018-07-23 23:39:44,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:39:44,292 INFO L225 Difference]: With dead ends: 160 [2018-07-23 23:39:44,292 INFO L226 Difference]: Without dead ends: 139 [2018-07-23 23:39:44,293 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=233, Invalid=759, Unknown=0, NotChecked=0, Total=992 [2018-07-23 23:39:44,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-07-23 23:39:44,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 47. [2018-07-23 23:39:44,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-07-23 23:39:44,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2018-07-23 23:39:44,306 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 32 [2018-07-23 23:39:44,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:39:44,306 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2018-07-23 23:39:44,306 INFO L472 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-07-23 23:39:44,306 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2018-07-23 23:39:44,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-07-23 23:39:44,307 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:39:44,307 INFO L353 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:39:44,307 INFO L414 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:39:44,308 INFO L82 PathProgramCache]: Analyzing trace with hash 801504993, now seen corresponding path program 6 times [2018-07-23 23:39:44,308 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:39:44,308 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:39:44,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:44,309 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:39:44,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:44,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:39:44,549 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:44,550 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:39:44,550 INFO L221 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 [2018-07-23 23:39:44,565 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:39:44,650 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-07-23 23:39:44,651 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:39:44,653 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:39:44,767 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:44,790 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:39:44,790 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2018-07-23 23:39:44,791 INFO L450 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-07-23 23:39:44,791 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-07-23 23:39:44,791 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2018-07-23 23:39:44,791 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 10 states. [2018-07-23 23:39:44,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:39:44,926 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2018-07-23 23:39:44,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-07-23 23:39:44,927 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2018-07-23 23:39:44,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:39:44,928 INFO L225 Difference]: With dead ends: 60 [2018-07-23 23:39:44,928 INFO L226 Difference]: Without dead ends: 58 [2018-07-23 23:39:44,929 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2018-07-23 23:39:44,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-07-23 23:39:44,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 51. [2018-07-23 23:39:44,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-07-23 23:39:44,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2018-07-23 23:39:44,941 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 34 [2018-07-23 23:39:44,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:39:44,941 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2018-07-23 23:39:44,941 INFO L472 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-07-23 23:39:44,942 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2018-07-23 23:39:44,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-07-23 23:39:44,942 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:39:44,943 INFO L353 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:39:44,943 INFO L414 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:39:44,943 INFO L82 PathProgramCache]: Analyzing trace with hash -706006742, now seen corresponding path program 7 times [2018-07-23 23:39:44,943 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:39:44,943 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:39:44,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:44,944 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:39:44,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:44,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:39:45,103 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:45,103 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:39:45,103 INFO L221 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 [2018-07-23 23:39:45,110 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:39:45,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:39:45,141 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:39:45,525 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:45,545 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:39:45,545 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2018-07-23 23:39:45,545 INFO L450 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-07-23 23:39:45,545 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-07-23 23:39:45,546 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2018-07-23 23:39:45,546 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand 26 states. [2018-07-23 23:39:45,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:39:45,797 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2018-07-23 23:39:45,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-07-23 23:39:45,797 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 38 [2018-07-23 23:39:45,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:39:45,798 INFO L225 Difference]: With dead ends: 108 [2018-07-23 23:39:45,798 INFO L226 Difference]: Without dead ends: 83 [2018-07-23 23:39:45,798 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=315, Invalid=1091, Unknown=0, NotChecked=0, Total=1406 [2018-07-23 23:39:45,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-07-23 23:39:45,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 53. [2018-07-23 23:39:45,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-07-23 23:39:45,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2018-07-23 23:39:45,812 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 38 [2018-07-23 23:39:45,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:39:45,813 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2018-07-23 23:39:45,813 INFO L472 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-07-23 23:39:45,813 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2018-07-23 23:39:45,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-07-23 23:39:45,814 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:39:45,814 INFO L353 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:39:45,814 INFO L414 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:39:45,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1478384714, now seen corresponding path program 4 times [2018-07-23 23:39:45,814 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:39:45,815 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:39:45,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:45,815 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:39:45,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:45,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:39:46,009 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 36 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:46,010 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:39:46,010 INFO L221 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 [2018-07-23 23:39:46,019 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:39:46,035 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:39:46,035 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:39:46,037 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:39:46,255 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 36 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:46,275 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:39:46,275 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2018-07-23 23:39:46,276 INFO L450 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-07-23 23:39:46,276 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-07-23 23:39:46,276 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2018-07-23 23:39:46,276 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 25 states. [2018-07-23 23:39:46,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:39:46,601 INFO L93 Difference]: Finished difference Result 138 states and 147 transitions. [2018-07-23 23:39:46,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-07-23 23:39:46,601 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 38 [2018-07-23 23:39:46,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:39:46,602 INFO L225 Difference]: With dead ends: 138 [2018-07-23 23:39:46,602 INFO L226 Difference]: Without dead ends: 113 [2018-07-23 23:39:46,603 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=351, Invalid=1289, Unknown=0, NotChecked=0, Total=1640 [2018-07-23 23:39:46,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-07-23 23:39:46,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 53. [2018-07-23 23:39:46,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-07-23 23:39:46,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2018-07-23 23:39:46,615 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 38 [2018-07-23 23:39:46,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:39:46,615 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2018-07-23 23:39:46,615 INFO L472 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-07-23 23:39:46,616 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2018-07-23 23:39:46,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-07-23 23:39:46,616 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:39:46,616 INFO L353 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:39:46,617 INFO L414 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:39:46,617 INFO L82 PathProgramCache]: Analyzing trace with hash -978630334, now seen corresponding path program 5 times [2018-07-23 23:39:46,617 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:39:46,617 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:39:46,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:46,618 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:39:46,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:46,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:39:46,786 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:46,787 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:39:46,787 INFO L221 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 [2018-07-23 23:39:46,796 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:39:46,814 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-07-23 23:39:46,815 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:39:46,816 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:39:47,007 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:47,030 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:39:47,030 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2018-07-23 23:39:47,030 INFO L450 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-07-23 23:39:47,031 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-07-23 23:39:47,031 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2018-07-23 23:39:47,031 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 24 states. [2018-07-23 23:39:47,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:39:47,797 INFO L93 Difference]: Finished difference Result 166 states and 176 transitions. [2018-07-23 23:39:47,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-07-23 23:39:47,797 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 38 [2018-07-23 23:39:47,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:39:47,798 INFO L225 Difference]: With dead ends: 166 [2018-07-23 23:39:47,798 INFO L226 Difference]: Without dead ends: 141 [2018-07-23 23:39:47,799 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=364, Invalid=1358, Unknown=0, NotChecked=0, Total=1722 [2018-07-23 23:39:47,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-07-23 23:39:47,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 53. [2018-07-23 23:39:47,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-07-23 23:39:47,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2018-07-23 23:39:47,815 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 38 [2018-07-23 23:39:47,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:39:47,815 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2018-07-23 23:39:47,815 INFO L472 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-07-23 23:39:47,815 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2018-07-23 23:39:47,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-07-23 23:39:47,816 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:39:47,816 INFO L353 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:39:47,816 INFO L414 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:39:47,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1618534862, now seen corresponding path program 6 times [2018-07-23 23:39:47,817 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:39:47,817 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:39:47,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:47,818 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:39:47,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:47,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:39:48,578 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 36 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:48,578 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:39:48,578 INFO L221 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 [2018-07-23 23:39:48,586 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:39:48,608 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-07-23 23:39:48,608 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:39:48,610 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:39:48,865 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 36 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:48,885 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:39:48,885 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2018-07-23 23:39:48,885 INFO L450 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-07-23 23:39:48,886 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-07-23 23:39:48,886 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2018-07-23 23:39:48,886 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 23 states. [2018-07-23 23:39:49,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:39:49,298 INFO L93 Difference]: Finished difference Result 192 states and 203 transitions. [2018-07-23 23:39:49,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-07-23 23:39:49,298 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 38 [2018-07-23 23:39:49,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:39:49,299 INFO L225 Difference]: With dead ends: 192 [2018-07-23 23:39:49,299 INFO L226 Difference]: Without dead ends: 167 [2018-07-23 23:39:49,299 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=351, Invalid=1289, Unknown=0, NotChecked=0, Total=1640 [2018-07-23 23:39:49,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-07-23 23:39:49,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 53. [2018-07-23 23:39:49,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-07-23 23:39:49,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2018-07-23 23:39:49,313 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 38 [2018-07-23 23:39:49,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:39:49,313 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2018-07-23 23:39:49,313 INFO L472 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-07-23 23:39:49,314 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2018-07-23 23:39:49,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-07-23 23:39:49,314 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:39:49,314 INFO L353 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:39:49,314 INFO L414 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:39:49,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1096077990, now seen corresponding path program 4 times [2018-07-23 23:39:49,315 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:39:49,315 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:39:49,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:49,316 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:39:49,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:49,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:39:49,447 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:49,447 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:39:49,447 INFO L221 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 [2018-07-23 23:39:49,458 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:39:49,476 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:39:49,476 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:39:49,477 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:39:49,648 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:49,669 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:39:49,669 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2018-07-23 23:39:49,670 INFO L450 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-07-23 23:39:49,670 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-07-23 23:39:49,670 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2018-07-23 23:39:49,670 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 22 states. [2018-07-23 23:39:50,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:39:50,080 INFO L93 Difference]: Finished difference Result 221 states and 234 transitions. [2018-07-23 23:39:50,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-07-23 23:39:50,081 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 38 [2018-07-23 23:39:50,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:39:50,082 INFO L225 Difference]: With dead ends: 221 [2018-07-23 23:39:50,082 INFO L226 Difference]: Without dead ends: 196 [2018-07-23 23:39:50,083 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=315, Invalid=1091, Unknown=0, NotChecked=0, Total=1406 [2018-07-23 23:39:50,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2018-07-23 23:39:50,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 56. [2018-07-23 23:39:50,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-07-23 23:39:50,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2018-07-23 23:39:50,100 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 38 [2018-07-23 23:39:50,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:39:50,101 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2018-07-23 23:39:50,101 INFO L472 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-07-23 23:39:50,101 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2018-07-23 23:39:50,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-07-23 23:39:50,101 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:39:50,101 INFO L353 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:39:50,102 INFO L414 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:39:50,102 INFO L82 PathProgramCache]: Analyzing trace with hash -2048305116, now seen corresponding path program 8 times [2018-07-23 23:39:50,102 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:39:50,102 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:39:50,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:50,103 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:39:50,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:50,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:39:50,226 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 30 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:50,226 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:39:50,226 INFO L221 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 [2018-07-23 23:39:50,241 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:39:50,271 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:39:50,272 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:39:50,273 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:39:50,325 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 30 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:50,347 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:39:50,347 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2018-07-23 23:39:50,347 INFO L450 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-07-23 23:39:50,347 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-07-23 23:39:50,348 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2018-07-23 23:39:50,348 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand 11 states. [2018-07-23 23:39:50,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:39:50,578 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2018-07-23 23:39:50,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-07-23 23:39:50,579 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2018-07-23 23:39:50,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:39:50,580 INFO L225 Difference]: With dead ends: 69 [2018-07-23 23:39:50,580 INFO L226 Difference]: Without dead ends: 67 [2018-07-23 23:39:50,580 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2018-07-23 23:39:50,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-07-23 23:39:50,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 60. [2018-07-23 23:39:50,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-07-23 23:39:50,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2018-07-23 23:39:50,597 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 40 [2018-07-23 23:39:50,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:39:50,597 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2018-07-23 23:39:50,597 INFO L472 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-07-23 23:39:50,597 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2018-07-23 23:39:50,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-07-23 23:39:50,598 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:39:50,598 INFO L353 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:39:50,598 INFO L414 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:39:50,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1282027757, now seen corresponding path program 9 times [2018-07-23 23:39:50,598 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:39:50,598 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:39:50,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:50,599 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:39:50,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:50,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:39:50,828 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 55 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:50,828 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:39:50,828 INFO L221 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 [2018-07-23 23:39:50,838 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:39:50,857 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-07-23 23:39:50,858 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:39:50,860 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:39:51,060 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 55 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:51,080 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:39:51,080 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 30 [2018-07-23 23:39:51,080 INFO L450 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-07-23 23:39:51,080 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-07-23 23:39:51,081 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=685, Unknown=0, NotChecked=0, Total=870 [2018-07-23 23:39:51,081 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand 30 states. [2018-07-23 23:39:51,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:39:51,459 INFO L93 Difference]: Finished difference Result 127 states and 136 transitions. [2018-07-23 23:39:51,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-07-23 23:39:51,459 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 44 [2018-07-23 23:39:51,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:39:51,460 INFO L225 Difference]: With dead ends: 127 [2018-07-23 23:39:51,460 INFO L226 Difference]: Without dead ends: 98 [2018-07-23 23:39:51,461 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=409, Invalid=1483, Unknown=0, NotChecked=0, Total=1892 [2018-07-23 23:39:51,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-07-23 23:39:51,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 62. [2018-07-23 23:39:51,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-07-23 23:39:51,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2018-07-23 23:39:51,481 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 44 [2018-07-23 23:39:51,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:39:51,481 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2018-07-23 23:39:51,481 INFO L472 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-07-23 23:39:51,481 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2018-07-23 23:39:51,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-07-23 23:39:51,481 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:39:51,482 INFO L353 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:39:51,482 INFO L414 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:39:51,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1037333895, now seen corresponding path program 7 times [2018-07-23 23:39:51,482 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:39:51,482 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:39:51,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:51,483 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:39:51,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:51,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:39:51,667 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 55 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:51,667 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:39:51,667 INFO L221 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 [2018-07-23 23:39:51,675 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:39:51,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:39:51,705 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:39:52,005 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 55 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:52,025 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:39:52,025 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2018-07-23 23:39:52,025 INFO L450 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-07-23 23:39:52,026 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-07-23 23:39:52,026 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2018-07-23 23:39:52,026 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand 29 states. [2018-07-23 23:39:52,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:39:52,484 INFO L93 Difference]: Finished difference Result 163 states and 173 transitions. [2018-07-23 23:39:52,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-07-23 23:39:52,484 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 44 [2018-07-23 23:39:52,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:39:52,484 INFO L225 Difference]: With dead ends: 163 [2018-07-23 23:39:52,485 INFO L226 Difference]: Without dead ends: 134 [2018-07-23 23:39:52,485 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=465, Invalid=1791, Unknown=0, NotChecked=0, Total=2256 [2018-07-23 23:39:52,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-07-23 23:39:52,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 62. [2018-07-23 23:39:52,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-07-23 23:39:52,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2018-07-23 23:39:52,507 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 44 [2018-07-23 23:39:52,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:39:52,507 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2018-07-23 23:39:52,507 INFO L472 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-07-23 23:39:52,507 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2018-07-23 23:39:52,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-07-23 23:39:52,508 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:39:52,508 INFO L353 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:39:52,508 INFO L414 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:39:52,508 INFO L82 PathProgramCache]: Analyzing trace with hash -145893627, now seen corresponding path program 8 times [2018-07-23 23:39:52,508 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:39:52,508 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:39:52,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:52,509 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:39:52,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:52,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:39:52,727 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 55 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:52,727 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:39:52,727 INFO L221 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 [2018-07-23 23:39:52,734 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:39:52,753 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:39:52,753 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:39:52,755 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:39:53,086 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 55 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:53,106 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:39:53,106 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 28 [2018-07-23 23:39:53,106 INFO L450 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-07-23 23:39:53,107 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-07-23 23:39:53,107 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756 [2018-07-23 23:39:53,107 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand 28 states. [2018-07-23 23:39:53,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:39:53,664 INFO L93 Difference]: Finished difference Result 197 states and 208 transitions. [2018-07-23 23:39:53,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-07-23 23:39:53,664 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 44 [2018-07-23 23:39:53,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:39:53,665 INFO L225 Difference]: With dead ends: 197 [2018-07-23 23:39:53,665 INFO L226 Difference]: Without dead ends: 168 [2018-07-23 23:39:53,667 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=496, Invalid=1954, Unknown=0, NotChecked=0, Total=2450 [2018-07-23 23:39:53,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2018-07-23 23:39:53,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 62. [2018-07-23 23:39:53,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-07-23 23:39:53,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2018-07-23 23:39:53,693 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 44 [2018-07-23 23:39:53,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:39:53,693 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2018-07-23 23:39:53,693 INFO L472 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-07-23 23:39:53,693 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2018-07-23 23:39:53,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-07-23 23:39:53,694 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:39:53,694 INFO L353 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:39:53,694 INFO L414 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:39:53,694 INFO L82 PathProgramCache]: Analyzing trace with hash 628217489, now seen corresponding path program 9 times [2018-07-23 23:39:53,694 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:39:53,694 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:39:53,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:53,695 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:39:53,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:53,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:39:53,865 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 55 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:53,865 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:39:53,866 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:39:53,874 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:39:53,898 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-07-23 23:39:53,899 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:39:53,900 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:39:54,131 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 55 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:54,152 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:39:54,152 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 27 [2018-07-23 23:39:54,152 INFO L450 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-07-23 23:39:54,152 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-07-23 23:39:54,153 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2018-07-23 23:39:54,153 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand 27 states. [2018-07-23 23:39:54,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:39:54,814 INFO L93 Difference]: Finished difference Result 229 states and 241 transitions. [2018-07-23 23:39:54,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-07-23 23:39:54,814 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 44 [2018-07-23 23:39:54,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:39:54,815 INFO L225 Difference]: With dead ends: 229 [2018-07-23 23:39:54,815 INFO L226 Difference]: Without dead ends: 200 [2018-07-23 23:39:54,816 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=496, Invalid=1954, Unknown=0, NotChecked=0, Total=2450 [2018-07-23 23:39:54,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2018-07-23 23:39:54,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 62. [2018-07-23 23:39:54,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-07-23 23:39:54,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2018-07-23 23:39:54,848 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 44 [2018-07-23 23:39:54,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:39:54,848 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2018-07-23 23:39:54,848 INFO L472 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-07-23 23:39:54,849 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2018-07-23 23:39:54,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-07-23 23:39:54,849 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:39:54,849 INFO L353 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:39:54,849 INFO L414 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:39:54,850 INFO L82 PathProgramCache]: Analyzing trace with hash -144160483, now seen corresponding path program 10 times [2018-07-23 23:39:54,850 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:39:54,850 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:39:54,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:54,851 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:39:54,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:54,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:39:55,097 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 55 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:55,097 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:39:55,097 INFO L221 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 [2018-07-23 23:39:55,104 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:39:55,123 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:39:55,123 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:39:55,124 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:39:55,315 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 55 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:55,335 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:39:55,335 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 26 [2018-07-23 23:39:55,335 INFO L450 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-07-23 23:39:55,336 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-07-23 23:39:55,336 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2018-07-23 23:39:55,336 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand 26 states. [2018-07-23 23:39:56,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:39:56,037 INFO L93 Difference]: Finished difference Result 259 states and 272 transitions. [2018-07-23 23:39:56,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-07-23 23:39:56,038 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 44 [2018-07-23 23:39:56,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:39:56,039 INFO L225 Difference]: With dead ends: 259 [2018-07-23 23:39:56,039 INFO L226 Difference]: Without dead ends: 230 [2018-07-23 23:39:56,040 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=465, Invalid=1791, Unknown=0, NotChecked=0, Total=2256 [2018-07-23 23:39:56,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2018-07-23 23:39:56,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 62. [2018-07-23 23:39:56,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-07-23 23:39:56,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2018-07-23 23:39:56,065 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 44 [2018-07-23 23:39:56,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:39:56,066 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2018-07-23 23:39:56,066 INFO L472 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-07-23 23:39:56,066 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2018-07-23 23:39:56,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-07-23 23:39:56,066 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:39:56,066 INFO L353 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:39:56,067 INFO L414 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:39:56,067 INFO L82 PathProgramCache]: Analyzing trace with hash 355593897, now seen corresponding path program 5 times [2018-07-23 23:39:56,067 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:39:56,067 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:39:56,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:56,068 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:39:56,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:56,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:39:56,295 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 55 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:56,295 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:39:56,295 INFO L221 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 [2018-07-23 23:39:56,304 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:39:56,324 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-07-23 23:39:56,324 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:39:56,326 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:39:56,638 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 55 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:56,658 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:39:56,658 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2018-07-23 23:39:56,658 INFO L450 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-07-23 23:39:56,658 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-07-23 23:39:56,659 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=465, Unknown=0, NotChecked=0, Total=600 [2018-07-23 23:39:56,659 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand 25 states. [2018-07-23 23:39:57,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:39:57,151 INFO L93 Difference]: Finished difference Result 292 states and 307 transitions. [2018-07-23 23:39:57,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-07-23 23:39:57,152 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 44 [2018-07-23 23:39:57,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:39:57,153 INFO L225 Difference]: With dead ends: 292 [2018-07-23 23:39:57,153 INFO L226 Difference]: Without dead ends: 263 [2018-07-23 23:39:57,154 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=409, Invalid=1483, Unknown=0, NotChecked=0, Total=1892 [2018-07-23 23:39:57,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2018-07-23 23:39:57,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 65. [2018-07-23 23:39:57,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-07-23 23:39:57,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2018-07-23 23:39:57,180 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 44 [2018-07-23 23:39:57,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:39:57,181 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2018-07-23 23:39:57,181 INFO L472 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-07-23 23:39:57,181 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2018-07-23 23:39:57,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-07-23 23:39:57,181 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:39:57,181 INFO L353 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:39:57,181 INFO L414 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:39:57,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1535751271, now seen corresponding path program 10 times [2018-07-23 23:39:57,182 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:39:57,182 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:39:57,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:57,183 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:39:57,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:57,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:39:57,309 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 42 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:57,309 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:39:57,309 INFO L221 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 [2018-07-23 23:39:57,316 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:39:57,335 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:39:57,335 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:39:57,336 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:39:57,361 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 42 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:57,382 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:39:57,382 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2018-07-23 23:39:57,382 INFO L450 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-07-23 23:39:57,382 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-07-23 23:39:57,382 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2018-07-23 23:39:57,383 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand 12 states. [2018-07-23 23:39:57,794 WARN L169 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 7 [2018-07-23 23:39:58,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:39:58,266 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2018-07-23 23:39:58,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-07-23 23:39:58,267 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2018-07-23 23:39:58,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:39:58,268 INFO L225 Difference]: With dead ends: 78 [2018-07-23 23:39:58,268 INFO L226 Difference]: Without dead ends: 76 [2018-07-23 23:39:58,268 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2018-07-23 23:39:58,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-07-23 23:39:58,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 69. [2018-07-23 23:39:58,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-07-23 23:39:58,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2018-07-23 23:39:58,297 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 46 [2018-07-23 23:39:58,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:39:58,298 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2018-07-23 23:39:58,298 INFO L472 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-07-23 23:39:58,298 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2018-07-23 23:39:58,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-07-23 23:39:58,298 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:39:58,298 INFO L353 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:39:58,298 INFO L414 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:39:58,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1714205616, now seen corresponding path program 11 times [2018-07-23 23:39:58,299 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:39:58,299 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:39:58,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:58,300 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:39:58,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:58,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:39:58,748 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 78 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:58,748 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:39:58,748 INFO L221 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 [2018-07-23 23:39:58,762 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:39:58,786 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-07-23 23:39:58,786 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:39:58,788 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:39:59,046 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 78 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:59,066 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:39:59,067 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 34 [2018-07-23 23:39:59,067 INFO L450 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-07-23 23:39:59,067 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-07-23 23:39:59,068 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=887, Unknown=0, NotChecked=0, Total=1122 [2018-07-23 23:39:59,068 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand 34 states. [2018-07-23 23:39:59,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:39:59,513 INFO L93 Difference]: Finished difference Result 146 states and 156 transitions. [2018-07-23 23:39:59,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-07-23 23:39:59,513 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 50 [2018-07-23 23:39:59,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:39:59,514 INFO L225 Difference]: With dead ends: 146 [2018-07-23 23:39:59,514 INFO L226 Difference]: Without dead ends: 113 [2018-07-23 23:39:59,515 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=515, Invalid=1935, Unknown=0, NotChecked=0, Total=2450 [2018-07-23 23:39:59,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-07-23 23:39:59,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 71. [2018-07-23 23:39:59,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-07-23 23:39:59,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2018-07-23 23:39:59,549 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 50 [2018-07-23 23:39:59,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:39:59,549 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2018-07-23 23:39:59,549 INFO L472 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-07-23 23:39:59,549 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2018-07-23 23:39:59,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-07-23 23:39:59,550 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:39:59,550 INFO L353 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:39:59,550 INFO L414 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:39:59,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1079004100, now seen corresponding path program 11 times [2018-07-23 23:39:59,550 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:39:59,551 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:39:59,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:59,551 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:39:59,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:59,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:39:59,726 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 78 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:59,726 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:39:59,726 INFO L221 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 [2018-07-23 23:39:59,736 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:39:59,772 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-07-23 23:39:59,773 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:39:59,775 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:00,050 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 78 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:00,070 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:00,070 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 33 [2018-07-23 23:40:00,070 INFO L450 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-07-23 23:40:00,070 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-07-23 23:40:00,071 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=842, Unknown=0, NotChecked=0, Total=1056 [2018-07-23 23:40:00,071 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand 33 states. [2018-07-23 23:40:00,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:00,802 INFO L93 Difference]: Finished difference Result 188 states and 199 transitions. [2018-07-23 23:40:00,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-07-23 23:40:00,802 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 50 [2018-07-23 23:40:00,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:00,803 INFO L225 Difference]: With dead ends: 188 [2018-07-23 23:40:00,803 INFO L226 Difference]: Without dead ends: 155 [2018-07-23 23:40:00,805 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=595, Invalid=2375, Unknown=0, NotChecked=0, Total=2970 [2018-07-23 23:40:00,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-07-23 23:40:00,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 71. [2018-07-23 23:40:00,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-07-23 23:40:00,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2018-07-23 23:40:00,849 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 50 [2018-07-23 23:40:00,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:00,849 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2018-07-23 23:40:00,849 INFO L472 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-07-23 23:40:00,849 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2018-07-23 23:40:00,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-07-23 23:40:00,850 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:00,850 INFO L353 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:00,850 INFO L414 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:00,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1523673032, now seen corresponding path program 12 times [2018-07-23 23:40:00,850 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:00,850 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:00,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:00,851 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:40:00,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:00,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:01,778 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 78 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:01,778 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:01,779 INFO L221 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 [2018-07-23 23:40:01,785 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:40:01,809 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-07-23 23:40:01,809 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:40:01,811 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:02,132 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 78 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:02,153 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:02,153 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 32 [2018-07-23 23:40:02,153 INFO L450 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-07-23 23:40:02,154 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-07-23 23:40:02,154 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=795, Unknown=0, NotChecked=0, Total=992 [2018-07-23 23:40:02,154 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand 32 states. [2018-07-23 23:40:02,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:02,856 INFO L93 Difference]: Finished difference Result 228 states and 240 transitions. [2018-07-23 23:40:02,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-07-23 23:40:02,856 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 50 [2018-07-23 23:40:02,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:02,857 INFO L225 Difference]: With dead ends: 228 [2018-07-23 23:40:02,857 INFO L226 Difference]: Without dead ends: 195 [2018-07-23 23:40:02,859 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=649, Invalid=2657, Unknown=0, NotChecked=0, Total=3306 [2018-07-23 23:40:02,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-07-23 23:40:02,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 71. [2018-07-23 23:40:02,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-07-23 23:40:02,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2018-07-23 23:40:02,903 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 50 [2018-07-23 23:40:02,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:02,903 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2018-07-23 23:40:02,903 INFO L472 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-07-23 23:40:02,904 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2018-07-23 23:40:02,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-07-23 23:40:02,904 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:02,904 INFO L353 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:02,904 INFO L414 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:02,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1705152084, now seen corresponding path program 13 times [2018-07-23 23:40:02,905 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:02,905 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:02,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:02,905 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:40:02,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:02,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:03,225 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 78 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:03,225 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:03,226 INFO L221 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 [2018-07-23 23:40:03,232 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:40:03,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:03,255 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:03,462 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 78 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:03,483 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:03,483 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 31 [2018-07-23 23:40:03,483 INFO L450 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-07-23 23:40:03,484 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-07-23 23:40:03,484 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=746, Unknown=0, NotChecked=0, Total=930 [2018-07-23 23:40:03,484 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand 31 states. [2018-07-23 23:40:04,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:04,302 INFO L93 Difference]: Finished difference Result 266 states and 279 transitions. [2018-07-23 23:40:04,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-07-23 23:40:04,302 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 50 [2018-07-23 23:40:04,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:04,304 INFO L225 Difference]: With dead ends: 266 [2018-07-23 23:40:04,304 INFO L226 Difference]: Without dead ends: 233 [2018-07-23 23:40:04,305 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=668, Invalid=2754, Unknown=0, NotChecked=0, Total=3422 [2018-07-23 23:40:04,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2018-07-23 23:40:04,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 71. [2018-07-23 23:40:04,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-07-23 23:40:04,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2018-07-23 23:40:04,345 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 50 [2018-07-23 23:40:04,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:04,346 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2018-07-23 23:40:04,346 INFO L472 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-07-23 23:40:04,346 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2018-07-23 23:40:04,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-07-23 23:40:04,346 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:04,347 INFO L353 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:04,347 INFO L414 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:04,347 INFO L82 PathProgramCache]: Analyzing trace with hash -614209568, now seen corresponding path program 14 times [2018-07-23 23:40:04,347 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:04,347 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:04,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:04,348 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:40:04,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:04,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:04,692 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 78 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:04,692 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:04,692 INFO L221 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 [2018-07-23 23:40:04,700 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:40:04,720 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:40:04,720 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:40:04,722 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:04,924 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 78 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:04,944 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:04,944 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 30 [2018-07-23 23:40:04,944 INFO L450 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-07-23 23:40:04,945 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-07-23 23:40:04,945 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=695, Unknown=0, NotChecked=0, Total=870 [2018-07-23 23:40:04,945 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand 30 states. [2018-07-23 23:40:05,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:05,899 INFO L93 Difference]: Finished difference Result 302 states and 316 transitions. [2018-07-23 23:40:05,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-07-23 23:40:05,899 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 50 [2018-07-23 23:40:05,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:05,901 INFO L225 Difference]: With dead ends: 302 [2018-07-23 23:40:05,901 INFO L226 Difference]: Without dead ends: 269 [2018-07-23 23:40:05,902 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 928 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=649, Invalid=2657, Unknown=0, NotChecked=0, Total=3306 [2018-07-23 23:40:05,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2018-07-23 23:40:05,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 71. [2018-07-23 23:40:05,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-07-23 23:40:05,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2018-07-23 23:40:05,951 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 50 [2018-07-23 23:40:05,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:05,951 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2018-07-23 23:40:05,951 INFO L472 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-07-23 23:40:05,951 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2018-07-23 23:40:05,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-07-23 23:40:05,951 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:05,952 INFO L353 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:05,952 INFO L414 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:05,952 INFO L82 PathProgramCache]: Analyzing trace with hash 277230700, now seen corresponding path program 15 times [2018-07-23 23:40:05,952 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:05,952 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:05,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:05,953 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:40:05,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:05,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:06,853 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 78 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:06,854 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:06,854 INFO L221 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 [2018-07-23 23:40:06,862 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:40:06,887 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-07-23 23:40:06,887 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:40:06,889 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:07,195 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 78 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:07,215 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:07,215 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 29 [2018-07-23 23:40:07,215 INFO L450 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-07-23 23:40:07,215 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-07-23 23:40:07,216 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2018-07-23 23:40:07,216 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand 29 states. [2018-07-23 23:40:08,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:08,001 INFO L93 Difference]: Finished difference Result 336 states and 351 transitions. [2018-07-23 23:40:08,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-07-23 23:40:08,001 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 50 [2018-07-23 23:40:08,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:08,003 INFO L225 Difference]: With dead ends: 336 [2018-07-23 23:40:08,003 INFO L226 Difference]: Without dead ends: 303 [2018-07-23 23:40:08,004 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=595, Invalid=2375, Unknown=0, NotChecked=0, Total=2970 [2018-07-23 23:40:08,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2018-07-23 23:40:08,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 71. [2018-07-23 23:40:08,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-07-23 23:40:08,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2018-07-23 23:40:08,046 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 50 [2018-07-23 23:40:08,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:08,046 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2018-07-23 23:40:08,046 INFO L472 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-07-23 23:40:08,046 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2018-07-23 23:40:08,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-07-23 23:40:08,047 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:08,047 INFO L353 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:08,047 INFO L414 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:08,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1051341816, now seen corresponding path program 6 times [2018-07-23 23:40:08,047 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:08,047 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:08,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:08,048 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:40:08,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:08,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:08,246 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 78 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:08,247 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:08,247 INFO L221 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 [2018-07-23 23:40:08,254 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:40:08,276 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-07-23 23:40:08,276 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:40:08,277 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:08,454 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 78 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:08,473 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:08,473 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2018-07-23 23:40:08,473 INFO L450 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-07-23 23:40:08,474 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-07-23 23:40:08,474 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=587, Unknown=0, NotChecked=0, Total=756 [2018-07-23 23:40:08,474 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand 28 states. [2018-07-23 23:40:09,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:09,210 INFO L93 Difference]: Finished difference Result 373 states and 390 transitions. [2018-07-23 23:40:09,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-07-23 23:40:09,211 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 50 [2018-07-23 23:40:09,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:09,212 INFO L225 Difference]: With dead ends: 373 [2018-07-23 23:40:09,212 INFO L226 Difference]: Without dead ends: 340 [2018-07-23 23:40:09,213 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=515, Invalid=1935, Unknown=0, NotChecked=0, Total=2450 [2018-07-23 23:40:09,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2018-07-23 23:40:09,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 74. [2018-07-23 23:40:09,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-07-23 23:40:09,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2018-07-23 23:40:09,256 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 50 [2018-07-23 23:40:09,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:09,256 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2018-07-23 23:40:09,256 INFO L472 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-07-23 23:40:09,256 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2018-07-23 23:40:09,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-07-23 23:40:09,256 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:09,256 INFO L353 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:09,257 INFO L414 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:09,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1746285482, now seen corresponding path program 12 times [2018-07-23 23:40:09,257 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:09,257 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:09,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:09,257 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:40:09,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:09,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:09,401 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 56 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:09,401 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:09,401 INFO L221 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 [2018-07-23 23:40:09,408 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:40:09,430 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-07-23 23:40:09,430 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:40:09,432 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:09,532 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 56 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:09,552 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:09,552 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2018-07-23 23:40:09,552 INFO L450 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-07-23 23:40:09,552 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-07-23 23:40:09,552 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2018-07-23 23:40:09,552 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand 13 states. [2018-07-23 23:40:09,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:09,770 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2018-07-23 23:40:09,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-07-23 23:40:09,771 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2018-07-23 23:40:09,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:09,771 INFO L225 Difference]: With dead ends: 87 [2018-07-23 23:40:09,771 INFO L226 Difference]: Without dead ends: 85 [2018-07-23 23:40:09,772 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=169, Invalid=293, Unknown=0, NotChecked=0, Total=462 [2018-07-23 23:40:09,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-07-23 23:40:09,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 78. [2018-07-23 23:40:09,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-07-23 23:40:09,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 87 transitions. [2018-07-23 23:40:09,816 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 87 transitions. Word has length 52 [2018-07-23 23:40:09,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:09,817 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 87 transitions. [2018-07-23 23:40:09,817 INFO L472 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-07-23 23:40:09,817 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 87 transitions. [2018-07-23 23:40:09,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-07-23 23:40:09,817 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:09,817 INFO L353 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:09,817 INFO L414 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:09,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1309792627, now seen corresponding path program 13 times [2018-07-23 23:40:09,818 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:09,818 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:09,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:09,818 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:40:09,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:09,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:10,077 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 105 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:10,078 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:10,078 INFO L221 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 [2018-07-23 23:40:10,084 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:40:10,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:10,109 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:10,490 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 105 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:10,510 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:10,510 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 38 [2018-07-23 23:40:10,510 INFO L450 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-07-23 23:40:10,510 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-07-23 23:40:10,510 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=1115, Unknown=0, NotChecked=0, Total=1406 [2018-07-23 23:40:10,511 INFO L87 Difference]: Start difference. First operand 78 states and 87 transitions. Second operand 38 states. [2018-07-23 23:40:11,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:11,317 INFO L93 Difference]: Finished difference Result 165 states and 176 transitions. [2018-07-23 23:40:11,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-07-23 23:40:11,317 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 56 [2018-07-23 23:40:11,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:11,318 INFO L225 Difference]: With dead ends: 165 [2018-07-23 23:40:11,318 INFO L226 Difference]: Without dead ends: 128 [2018-07-23 23:40:11,318 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 855 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=633, Invalid=2447, Unknown=0, NotChecked=0, Total=3080 [2018-07-23 23:40:11,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-07-23 23:40:11,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 80. [2018-07-23 23:40:11,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-07-23 23:40:11,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2018-07-23 23:40:11,371 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 56 [2018-07-23 23:40:11,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:11,371 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2018-07-23 23:40:11,371 INFO L472 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-07-23 23:40:11,371 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2018-07-23 23:40:11,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-07-23 23:40:11,371 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:11,372 INFO L353 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:11,372 INFO L414 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:11,372 INFO L82 PathProgramCache]: Analyzing trace with hash 658325759, now seen corresponding path program 16 times [2018-07-23 23:40:11,372 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:11,372 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:11,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:11,373 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:40:11,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:11,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:12,300 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 105 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:12,300 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:12,300 INFO L221 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 [2018-07-23 23:40:12,308 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:40:12,332 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:40:12,332 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:40:12,333 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:12,707 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 105 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:12,727 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:12,727 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 37 [2018-07-23 23:40:12,727 INFO L450 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-07-23 23:40:12,728 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-07-23 23:40:12,728 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=1065, Unknown=0, NotChecked=0, Total=1332 [2018-07-23 23:40:12,728 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand 37 states. [2018-07-23 23:40:13,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:13,702 INFO L93 Difference]: Finished difference Result 213 states and 225 transitions. [2018-07-23 23:40:13,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-07-23 23:40:13,702 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 56 [2018-07-23 23:40:13,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:13,703 INFO L225 Difference]: With dead ends: 213 [2018-07-23 23:40:13,703 INFO L226 Difference]: Without dead ends: 176 [2018-07-23 23:40:13,703 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=741, Invalid=3041, Unknown=0, NotChecked=0, Total=3782 [2018-07-23 23:40:13,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-07-23 23:40:13,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 80. [2018-07-23 23:40:13,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-07-23 23:40:13,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2018-07-23 23:40:13,760 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 56 [2018-07-23 23:40:13,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:13,760 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2018-07-23 23:40:13,760 INFO L472 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-07-23 23:40:13,760 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2018-07-23 23:40:13,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-07-23 23:40:13,761 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:13,761 INFO L353 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:13,761 INFO L414 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:13,761 INFO L82 PathProgramCache]: Analyzing trace with hash 250944395, now seen corresponding path program 17 times [2018-07-23 23:40:13,761 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:13,761 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:13,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:13,762 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:40:13,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:13,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:14,038 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 105 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:14,039 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:14,039 INFO L221 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 [2018-07-23 23:40:14,047 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:40:14,072 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-07-23 23:40:14,073 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:40:14,075 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:14,370 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 105 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:14,391 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:14,391 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2018-07-23 23:40:14,391 INFO L450 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-07-23 23:40:14,392 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-07-23 23:40:14,392 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=1013, Unknown=0, NotChecked=0, Total=1260 [2018-07-23 23:40:14,392 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand 36 states. [2018-07-23 23:40:15,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:15,249 INFO L93 Difference]: Finished difference Result 259 states and 272 transitions. [2018-07-23 23:40:15,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-07-23 23:40:15,249 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 56 [2018-07-23 23:40:15,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:15,250 INFO L225 Difference]: With dead ends: 259 [2018-07-23 23:40:15,250 INFO L226 Difference]: Without dead ends: 222 [2018-07-23 23:40:15,251 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1256 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=823, Invalid=3467, Unknown=0, NotChecked=0, Total=4290 [2018-07-23 23:40:15,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2018-07-23 23:40:15,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 80. [2018-07-23 23:40:15,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-07-23 23:40:15,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2018-07-23 23:40:15,318 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 56 [2018-07-23 23:40:15,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:15,318 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2018-07-23 23:40:15,318 INFO L472 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-07-23 23:40:15,318 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2018-07-23 23:40:15,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-07-23 23:40:15,319 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:15,319 INFO L353 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:15,319 INFO L414 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:15,319 INFO L82 PathProgramCache]: Analyzing trace with hash 330967319, now seen corresponding path program 18 times [2018-07-23 23:40:15,319 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:15,319 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:15,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:15,320 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:40:15,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:15,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:15,746 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 105 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:15,746 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:15,746 INFO L221 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 [2018-07-23 23:40:15,753 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:40:15,783 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-07-23 23:40:15,783 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:40:15,785 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:16,220 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 105 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:16,239 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:16,240 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 35 [2018-07-23 23:40:16,240 INFO L450 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-07-23 23:40:16,240 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-07-23 23:40:16,240 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=959, Unknown=0, NotChecked=0, Total=1190 [2018-07-23 23:40:16,240 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand 35 states. [2018-07-23 23:40:17,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:17,218 INFO L93 Difference]: Finished difference Result 303 states and 317 transitions. [2018-07-23 23:40:17,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-07-23 23:40:17,218 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 56 [2018-07-23 23:40:17,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:17,220 INFO L225 Difference]: With dead ends: 303 [2018-07-23 23:40:17,220 INFO L226 Difference]: Without dead ends: 266 [2018-07-23 23:40:17,220 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1351 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=867, Invalid=3689, Unknown=0, NotChecked=0, Total=4556 [2018-07-23 23:40:17,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2018-07-23 23:40:17,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 80. [2018-07-23 23:40:17,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-07-23 23:40:17,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2018-07-23 23:40:17,281 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 56 [2018-07-23 23:40:17,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:17,281 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2018-07-23 23:40:17,281 INFO L472 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-07-23 23:40:17,282 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2018-07-23 23:40:17,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-07-23 23:40:17,282 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:17,282 INFO L353 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:17,282 INFO L414 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:17,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1832724899, now seen corresponding path program 19 times [2018-07-23 23:40:17,282 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:17,283 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:17,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:17,283 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:40:17,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:17,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:17,497 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 105 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:17,498 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:17,498 INFO L221 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 [2018-07-23 23:40:17,505 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:40:17,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:17,529 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:17,827 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 105 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:17,848 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:17,848 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 34 [2018-07-23 23:40:17,849 INFO L450 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-07-23 23:40:17,849 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-07-23 23:40:17,849 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=903, Unknown=0, NotChecked=0, Total=1122 [2018-07-23 23:40:17,849 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand 34 states. [2018-07-23 23:40:18,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:18,960 INFO L93 Difference]: Finished difference Result 345 states and 360 transitions. [2018-07-23 23:40:18,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-07-23 23:40:18,960 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 56 [2018-07-23 23:40:18,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:18,962 INFO L225 Difference]: With dead ends: 345 [2018-07-23 23:40:18,962 INFO L226 Difference]: Without dead ends: 308 [2018-07-23 23:40:18,962 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1353 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=867, Invalid=3689, Unknown=0, NotChecked=0, Total=4556 [2018-07-23 23:40:18,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2018-07-23 23:40:19,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 80. [2018-07-23 23:40:19,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-07-23 23:40:19,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2018-07-23 23:40:19,054 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 56 [2018-07-23 23:40:19,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:19,055 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2018-07-23 23:40:19,055 INFO L472 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-07-23 23:40:19,055 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2018-07-23 23:40:19,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-07-23 23:40:19,055 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:19,055 INFO L353 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:19,056 INFO L414 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:19,056 INFO L82 PathProgramCache]: Analyzing trace with hash 140434735, now seen corresponding path program 20 times [2018-07-23 23:40:19,056 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:19,056 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:19,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:19,057 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:40:19,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:19,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:19,441 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 105 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:19,441 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:19,441 INFO L221 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 [2018-07-23 23:40:19,449 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:40:19,474 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:40:19,474 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:40:19,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:21,438 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 105 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:21,458 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:21,458 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 33 [2018-07-23 23:40:21,458 INFO L450 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-07-23 23:40:21,458 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-07-23 23:40:21,459 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=845, Unknown=0, NotChecked=0, Total=1056 [2018-07-23 23:40:21,459 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand 33 states. [2018-07-23 23:40:22,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:22,541 INFO L93 Difference]: Finished difference Result 385 states and 401 transitions. [2018-07-23 23:40:22,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-07-23 23:40:22,541 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 56 [2018-07-23 23:40:22,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:22,542 INFO L225 Difference]: With dead ends: 385 [2018-07-23 23:40:22,542 INFO L226 Difference]: Without dead ends: 348 [2018-07-23 23:40:22,543 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1256 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=823, Invalid=3467, Unknown=0, NotChecked=0, Total=4290 [2018-07-23 23:40:22,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2018-07-23 23:40:22,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 80. [2018-07-23 23:40:22,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-07-23 23:40:22,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2018-07-23 23:40:22,609 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 56 [2018-07-23 23:40:22,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:22,609 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2018-07-23 23:40:22,609 INFO L472 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-07-23 23:40:22,610 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2018-07-23 23:40:22,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-07-23 23:40:22,610 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:22,610 INFO L353 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:22,610 INFO L414 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:22,610 INFO L82 PathProgramCache]: Analyzing trace with hash 321913787, now seen corresponding path program 21 times [2018-07-23 23:40:22,610 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:22,610 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:22,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:22,611 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:40:22,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:22,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:23,477 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 105 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:23,478 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:23,478 INFO L221 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 [2018-07-23 23:40:23,485 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:40:23,510 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-07-23 23:40:23,510 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:40:23,512 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:23,885 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 105 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:23,905 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:23,905 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 32 [2018-07-23 23:40:23,905 INFO L450 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-07-23 23:40:23,906 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-07-23 23:40:23,906 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=785, Unknown=0, NotChecked=0, Total=992 [2018-07-23 23:40:23,906 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand 32 states. [2018-07-23 23:40:25,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:25,012 INFO L93 Difference]: Finished difference Result 423 states and 440 transitions. [2018-07-23 23:40:25,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-07-23 23:40:25,012 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 56 [2018-07-23 23:40:25,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:25,014 INFO L225 Difference]: With dead ends: 423 [2018-07-23 23:40:25,014 INFO L226 Difference]: Without dead ends: 386 [2018-07-23 23:40:25,015 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1062 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=741, Invalid=3041, Unknown=0, NotChecked=0, Total=3782 [2018-07-23 23:40:25,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2018-07-23 23:40:25,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 80. [2018-07-23 23:40:25,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-07-23 23:40:25,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2018-07-23 23:40:25,084 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 56 [2018-07-23 23:40:25,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:25,084 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2018-07-23 23:40:25,084 INFO L472 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-07-23 23:40:25,084 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2018-07-23 23:40:25,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-07-23 23:40:25,085 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:25,085 INFO L353 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:25,085 INFO L414 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:25,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1997447865, now seen corresponding path program 7 times [2018-07-23 23:40:25,085 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:25,085 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:25,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:25,086 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:40:25,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:25,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:25,289 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 105 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:25,289 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:25,290 INFO L221 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 [2018-07-23 23:40:25,297 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:40:25,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:25,323 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:25,565 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 105 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:25,584 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:25,585 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 31 [2018-07-23 23:40:25,585 INFO L450 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-07-23 23:40:25,585 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-07-23 23:40:25,585 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=723, Unknown=0, NotChecked=0, Total=930 [2018-07-23 23:40:25,586 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand 31 states. [2018-07-23 23:40:26,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:26,783 INFO L93 Difference]: Finished difference Result 464 states and 483 transitions. [2018-07-23 23:40:26,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-07-23 23:40:26,783 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 56 [2018-07-23 23:40:26,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:26,784 INFO L225 Difference]: With dead ends: 464 [2018-07-23 23:40:26,785 INFO L226 Difference]: Without dead ends: 427 [2018-07-23 23:40:26,785 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 785 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=633, Invalid=2447, Unknown=0, NotChecked=0, Total=3080 [2018-07-23 23:40:26,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2018-07-23 23:40:26,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 83. [2018-07-23 23:40:26,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-07-23 23:40:26,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 93 transitions. [2018-07-23 23:40:26,863 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 93 transitions. Word has length 56 [2018-07-23 23:40:26,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:26,863 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 93 transitions. [2018-07-23 23:40:26,863 INFO L472 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-07-23 23:40:26,864 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 93 transitions. [2018-07-23 23:40:26,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-07-23 23:40:26,864 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:26,864 INFO L353 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:26,864 INFO L414 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:26,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1568011757, now seen corresponding path program 14 times [2018-07-23 23:40:26,865 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:26,865 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:26,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:26,865 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:40:26,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:26,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:27,014 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 72 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:27,014 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:27,015 INFO L221 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 [2018-07-23 23:40:27,022 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:40:27,049 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:40:27,049 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:40:27,050 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:27,079 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 72 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:27,099 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:27,099 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2018-07-23 23:40:27,099 INFO L450 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-07-23 23:40:27,099 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-07-23 23:40:27,100 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2018-07-23 23:40:27,100 INFO L87 Difference]: Start difference. First operand 83 states and 93 transitions. Second operand 14 states. [2018-07-23 23:40:27,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:27,387 INFO L93 Difference]: Finished difference Result 96 states and 106 transitions. [2018-07-23 23:40:27,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-07-23 23:40:27,387 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 58 [2018-07-23 23:40:27,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:27,388 INFO L225 Difference]: With dead ends: 96 [2018-07-23 23:40:27,388 INFO L226 Difference]: Without dead ends: 94 [2018-07-23 23:40:27,389 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=202, Invalid=350, Unknown=0, NotChecked=0, Total=552 [2018-07-23 23:40:27,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-07-23 23:40:27,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 87. [2018-07-23 23:40:27,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-07-23 23:40:27,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 97 transitions. [2018-07-23 23:40:27,458 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 97 transitions. Word has length 58 [2018-07-23 23:40:27,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:27,458 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 97 transitions. [2018-07-23 23:40:27,458 INFO L472 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-07-23 23:40:27,458 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 97 transitions. [2018-07-23 23:40:27,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-07-23 23:40:27,458 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:27,459 INFO L353 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:27,459 INFO L414 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:27,459 INFO L82 PathProgramCache]: Analyzing trace with hash 762364470, now seen corresponding path program 15 times [2018-07-23 23:40:27,459 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:27,459 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:27,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:27,460 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:40:27,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:27,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:27,705 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 136 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:27,705 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:27,705 INFO L221 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 [2018-07-23 23:40:27,714 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:40:27,747 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-07-23 23:40:27,747 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:40:27,749 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:28,118 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 136 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:28,137 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:28,138 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 42 [2018-07-23 23:40:28,138 INFO L450 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-07-23 23:40:28,138 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-07-23 23:40:28,139 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=1369, Unknown=0, NotChecked=0, Total=1722 [2018-07-23 23:40:28,139 INFO L87 Difference]: Start difference. First operand 87 states and 97 transitions. Second operand 42 states. [2018-07-23 23:40:28,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:28,886 INFO L93 Difference]: Finished difference Result 184 states and 196 transitions. [2018-07-23 23:40:28,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-07-23 23:40:28,886 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 62 [2018-07-23 23:40:28,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:28,887 INFO L225 Difference]: With dead ends: 184 [2018-07-23 23:40:28,887 INFO L226 Difference]: Without dead ends: 143 [2018-07-23 23:40:28,888 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1084 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=763, Invalid=3019, Unknown=0, NotChecked=0, Total=3782 [2018-07-23 23:40:28,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-07-23 23:40:29,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 89. [2018-07-23 23:40:29,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-07-23 23:40:29,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2018-07-23 23:40:29,016 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 62 [2018-07-23 23:40:29,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:29,016 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2018-07-23 23:40:29,016 INFO L472 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-07-23 23:40:29,016 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2018-07-23 23:40:29,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-07-23 23:40:29,017 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:29,017 INFO L353 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:29,017 INFO L414 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:29,017 INFO L82 PathProgramCache]: Analyzing trace with hash -904179518, now seen corresponding path program 22 times [2018-07-23 23:40:29,018 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:29,018 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:29,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:29,018 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:40:29,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:29,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:30,033 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 136 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:30,033 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:30,033 INFO L221 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 [2018-07-23 23:40:30,042 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:40:30,069 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:40:30,070 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:40:30,071 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:30,441 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 136 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:30,460 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:30,460 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 41 [2018-07-23 23:40:30,461 INFO L450 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-07-23 23:40:30,461 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-07-23 23:40:30,461 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=1314, Unknown=0, NotChecked=0, Total=1640 [2018-07-23 23:40:30,461 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand 41 states. [2018-07-23 23:40:31,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:31,683 INFO L93 Difference]: Finished difference Result 238 states and 251 transitions. [2018-07-23 23:40:31,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-07-23 23:40:31,683 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 62 [2018-07-23 23:40:31,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:31,684 INFO L225 Difference]: With dead ends: 238 [2018-07-23 23:40:31,684 INFO L226 Difference]: Without dead ends: 197 [2018-07-23 23:40:31,685 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1384 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=903, Invalid=3789, Unknown=0, NotChecked=0, Total=4692 [2018-07-23 23:40:31,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-07-23 23:40:31,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 89. [2018-07-23 23:40:31,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-07-23 23:40:31,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2018-07-23 23:40:31,819 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 62 [2018-07-23 23:40:31,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:31,819 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2018-07-23 23:40:31,819 INFO L472 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-07-23 23:40:31,819 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2018-07-23 23:40:31,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-07-23 23:40:31,820 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:31,820 INFO L353 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 7, 6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:31,820 INFO L414 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:31,820 INFO L82 PathProgramCache]: Analyzing trace with hash -923790770, now seen corresponding path program 23 times [2018-07-23 23:40:31,820 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:31,821 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:31,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:31,821 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:40:31,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:31,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:32,319 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 136 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:32,319 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:32,319 INFO L221 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 [2018-07-23 23:40:32,330 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:40:32,361 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-07-23 23:40:32,362 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:40:32,364 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:32,715 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 136 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:32,735 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:32,735 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 40 [2018-07-23 23:40:32,735 INFO L450 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-07-23 23:40:32,735 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-07-23 23:40:32,736 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=1257, Unknown=0, NotChecked=0, Total=1560 [2018-07-23 23:40:32,736 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand 40 states. [2018-07-23 23:40:33,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:33,950 INFO L93 Difference]: Finished difference Result 290 states and 304 transitions. [2018-07-23 23:40:33,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-07-23 23:40:33,951 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 62 [2018-07-23 23:40:33,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:33,952 INFO L225 Difference]: With dead ends: 290 [2018-07-23 23:40:33,952 INFO L226 Difference]: Without dead ends: 249 [2018-07-23 23:40:33,953 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1632 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1018, Invalid=4384, Unknown=0, NotChecked=0, Total=5402 [2018-07-23 23:40:33,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2018-07-23 23:40:34,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 89. [2018-07-23 23:40:34,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-07-23 23:40:34,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2018-07-23 23:40:34,063 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 62 [2018-07-23 23:40:34,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:34,064 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2018-07-23 23:40:34,064 INFO L472 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-07-23 23:40:34,064 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2018-07-23 23:40:34,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-07-23 23:40:34,064 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:34,064 INFO L353 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 6, 5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:34,064 INFO L414 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:34,065 INFO L82 PathProgramCache]: Analyzing trace with hash 81774298, now seen corresponding path program 24 times [2018-07-23 23:40:34,065 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:34,065 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:34,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:34,066 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:40:34,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:34,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:34,414 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 136 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:34,414 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:34,414 INFO L221 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 [2018-07-23 23:40:34,421 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:40:34,454 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-07-23 23:40:34,455 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:40:34,457 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:34,794 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 136 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:34,814 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:34,815 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 39 [2018-07-23 23:40:34,815 INFO L450 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-07-23 23:40:34,815 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-07-23 23:40:34,815 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=1198, Unknown=0, NotChecked=0, Total=1482 [2018-07-23 23:40:34,816 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand 39 states. [2018-07-23 23:40:36,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:36,175 INFO L93 Difference]: Finished difference Result 340 states and 355 transitions. [2018-07-23 23:40:36,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-07-23 23:40:36,175 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 62 [2018-07-23 23:40:36,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:36,177 INFO L225 Difference]: With dead ends: 340 [2018-07-23 23:40:36,177 INFO L226 Difference]: Without dead ends: 299 [2018-07-23 23:40:36,177 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1796 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1093, Invalid=4759, Unknown=0, NotChecked=0, Total=5852 [2018-07-23 23:40:36,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2018-07-23 23:40:36,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 89. [2018-07-23 23:40:36,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-07-23 23:40:36,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2018-07-23 23:40:36,276 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 62 [2018-07-23 23:40:36,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:36,277 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2018-07-23 23:40:36,277 INFO L472 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-07-23 23:40:36,277 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2018-07-23 23:40:36,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-07-23 23:40:36,277 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:36,277 INFO L353 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:36,277 INFO L414 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:36,277 INFO L82 PathProgramCache]: Analyzing trace with hash -569692570, now seen corresponding path program 25 times [2018-07-23 23:40:36,278 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:36,278 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:36,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:36,278 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:40:36,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:36,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:36,780 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 136 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:36,781 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:36,781 INFO L221 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 [2018-07-23 23:40:36,789 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:40:36,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:36,827 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:37,305 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 136 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:37,325 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:37,325 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 38 [2018-07-23 23:40:37,326 INFO L450 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-07-23 23:40:37,326 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-07-23 23:40:37,326 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=1137, Unknown=0, NotChecked=0, Total=1406 [2018-07-23 23:40:37,326 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand 38 states. [2018-07-23 23:40:38,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:38,810 INFO L93 Difference]: Finished difference Result 388 states and 404 transitions. [2018-07-23 23:40:38,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-07-23 23:40:38,811 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 62 [2018-07-23 23:40:38,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:38,812 INFO L225 Difference]: With dead ends: 388 [2018-07-23 23:40:38,812 INFO L226 Difference]: Without dead ends: 347 [2018-07-23 23:40:38,813 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1856 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1119, Invalid=4887, Unknown=0, NotChecked=0, Total=6006 [2018-07-23 23:40:38,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2018-07-23 23:40:38,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 89. [2018-07-23 23:40:38,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-07-23 23:40:38,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2018-07-23 23:40:38,913 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 62 [2018-07-23 23:40:38,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:38,913 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2018-07-23 23:40:38,913 INFO L472 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-07-23 23:40:38,913 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2018-07-23 23:40:38,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-07-23 23:40:38,913 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:38,914 INFO L353 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 6, 5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:38,914 INFO L414 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:38,914 INFO L82 PathProgramCache]: Analyzing trace with hash -977073934, now seen corresponding path program 26 times [2018-07-23 23:40:38,914 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:38,914 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:38,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:38,915 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:40:38,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:38,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:39,231 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 136 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:39,231 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:39,231 INFO L221 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 [2018-07-23 23:40:39,239 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:40:39,265 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:40:39,265 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:40:39,267 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:39,617 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 136 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:39,637 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:39,637 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 37 [2018-07-23 23:40:39,637 INFO L450 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-07-23 23:40:39,638 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-07-23 23:40:39,638 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1074, Unknown=0, NotChecked=0, Total=1332 [2018-07-23 23:40:39,638 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand 37 states. [2018-07-23 23:40:41,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:41,193 INFO L93 Difference]: Finished difference Result 434 states and 451 transitions. [2018-07-23 23:40:41,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-07-23 23:40:41,193 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 62 [2018-07-23 23:40:41,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:41,194 INFO L225 Difference]: With dead ends: 434 [2018-07-23 23:40:41,194 INFO L226 Difference]: Without dead ends: 393 [2018-07-23 23:40:41,195 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1803 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1093, Invalid=4759, Unknown=0, NotChecked=0, Total=5852 [2018-07-23 23:40:41,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2018-07-23 23:40:41,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 89. [2018-07-23 23:40:41,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-07-23 23:40:41,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2018-07-23 23:40:41,300 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 62 [2018-07-23 23:40:41,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:41,301 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2018-07-23 23:40:41,301 INFO L472 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-07-23 23:40:41,301 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2018-07-23 23:40:41,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-07-23 23:40:41,301 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:41,302 INFO L353 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 7, 6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:41,302 INFO L414 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:41,302 INFO L82 PathProgramCache]: Analyzing trace with hash -897051010, now seen corresponding path program 27 times [2018-07-23 23:40:41,302 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:41,302 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:41,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:41,303 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:40:41,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:41,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:41,889 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 136 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:41,889 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:41,890 INFO L221 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 [2018-07-23 23:40:41,896 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:40:41,928 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-07-23 23:40:41,928 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:40:41,931 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:42,210 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 136 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:42,230 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:42,231 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 36 [2018-07-23 23:40:42,231 INFO L450 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-07-23 23:40:42,231 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-07-23 23:40:42,231 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=1009, Unknown=0, NotChecked=0, Total=1260 [2018-07-23 23:40:42,231 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand 36 states. [2018-07-23 23:40:43,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:43,872 INFO L93 Difference]: Finished difference Result 478 states and 496 transitions. [2018-07-23 23:40:43,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-07-23 23:40:43,872 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 62 [2018-07-23 23:40:43,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:43,874 INFO L225 Difference]: With dead ends: 478 [2018-07-23 23:40:43,874 INFO L226 Difference]: Without dead ends: 437 [2018-07-23 23:40:43,875 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1634 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1018, Invalid=4384, Unknown=0, NotChecked=0, Total=5402 [2018-07-23 23:40:43,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2018-07-23 23:40:43,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 89. [2018-07-23 23:40:43,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-07-23 23:40:43,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2018-07-23 23:40:43,983 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 62 [2018-07-23 23:40:43,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:43,983 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2018-07-23 23:40:43,983 INFO L472 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-07-23 23:40:43,983 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2018-07-23 23:40:43,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-07-23 23:40:43,983 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:43,983 INFO L353 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:43,983 INFO L414 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:43,984 INFO L82 PathProgramCache]: Analyzing trace with hash 604706570, now seen corresponding path program 28 times [2018-07-23 23:40:43,984 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:43,984 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:43,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:43,984 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:40:43,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:43,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:44,280 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 136 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:44,280 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:44,281 INFO L221 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 [2018-07-23 23:40:44,289 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:40:44,313 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:40:44,313 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:40:44,315 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:44,594 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 136 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:44,614 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:44,615 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 35 [2018-07-23 23:40:44,615 INFO L450 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-07-23 23:40:44,615 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-07-23 23:40:44,615 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=942, Unknown=0, NotChecked=0, Total=1190 [2018-07-23 23:40:44,615 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand 35 states. [2018-07-23 23:40:46,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:46,230 INFO L93 Difference]: Finished difference Result 520 states and 539 transitions. [2018-07-23 23:40:46,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-07-23 23:40:46,230 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 62 [2018-07-23 23:40:46,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:46,232 INFO L225 Difference]: With dead ends: 520 [2018-07-23 23:40:46,232 INFO L226 Difference]: Without dead ends: 479 [2018-07-23 23:40:46,233 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1357 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=903, Invalid=3789, Unknown=0, NotChecked=0, Total=4692 [2018-07-23 23:40:46,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2018-07-23 23:40:46,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 89. [2018-07-23 23:40:46,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-07-23 23:40:46,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2018-07-23 23:40:46,346 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 62 [2018-07-23 23:40:46,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:46,346 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2018-07-23 23:40:46,346 INFO L472 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-07-23 23:40:46,346 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2018-07-23 23:40:46,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-07-23 23:40:46,346 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:46,347 INFO L353 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:46,347 INFO L414 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:46,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1087583594, now seen corresponding path program 8 times [2018-07-23 23:40:46,347 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:46,347 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:46,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:46,347 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:40:46,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:46,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:46,801 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 136 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:46,801 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:46,801 INFO L221 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 [2018-07-23 23:40:46,810 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:40:46,835 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:40:46,835 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:40:46,837 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:47,181 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 136 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:47,201 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:47,201 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 34 [2018-07-23 23:40:47,202 INFO L450 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-07-23 23:40:47,202 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-07-23 23:40:47,202 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=873, Unknown=0, NotChecked=0, Total=1122 [2018-07-23 23:40:47,202 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand 34 states. [2018-07-23 23:40:48,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:48,796 INFO L93 Difference]: Finished difference Result 565 states and 586 transitions. [2018-07-23 23:40:48,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-07-23 23:40:48,797 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 62 [2018-07-23 23:40:48,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:48,798 INFO L225 Difference]: With dead ends: 565 [2018-07-23 23:40:48,798 INFO L226 Difference]: Without dead ends: 524 [2018-07-23 23:40:48,799 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=763, Invalid=3019, Unknown=0, NotChecked=0, Total=3782 [2018-07-23 23:40:48,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2018-07-23 23:40:48,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 92. [2018-07-23 23:40:48,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-07-23 23:40:48,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 103 transitions. [2018-07-23 23:40:48,924 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 103 transitions. Word has length 62 [2018-07-23 23:40:48,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:48,924 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 103 transitions. [2018-07-23 23:40:48,924 INFO L472 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-07-23 23:40:48,924 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 103 transitions. [2018-07-23 23:40:48,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-07-23 23:40:48,924 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:48,924 INFO L353 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:48,924 INFO L414 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:48,925 INFO L82 PathProgramCache]: Analyzing trace with hash -2046289104, now seen corresponding path program 16 times [2018-07-23 23:40:48,925 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:48,925 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:48,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:48,925 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:40:48,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:48,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:49,140 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 90 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:49,141 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:49,141 INFO L221 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 [2018-07-23 23:40:49,148 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:40:49,175 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:40:49,175 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:40:49,177 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:49,378 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 90 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:49,416 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:49,417 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2018-07-23 23:40:49,417 INFO L450 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-07-23 23:40:49,417 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-07-23 23:40:49,417 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2018-07-23 23:40:49,418 INFO L87 Difference]: Start difference. First operand 92 states and 103 transitions. Second operand 15 states. [2018-07-23 23:40:50,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:50,872 INFO L93 Difference]: Finished difference Result 105 states and 116 transitions. [2018-07-23 23:40:50,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-07-23 23:40:50,872 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 64 [2018-07-23 23:40:50,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:50,872 INFO L225 Difference]: With dead ends: 105 [2018-07-23 23:40:50,873 INFO L226 Difference]: Without dead ends: 103 [2018-07-23 23:40:50,873 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=238, Invalid=412, Unknown=0, NotChecked=0, Total=650 [2018-07-23 23:40:50,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-07-23 23:40:50,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 96. [2018-07-23 23:40:50,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-07-23 23:40:50,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 107 transitions. [2018-07-23 23:40:50,995 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 107 transitions. Word has length 64 [2018-07-23 23:40:50,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:50,996 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 107 transitions. [2018-07-23 23:40:50,996 INFO L472 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-07-23 23:40:50,996 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 107 transitions. [2018-07-23 23:40:50,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-07-23 23:40:50,996 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:50,996 INFO L353 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:50,997 INFO L414 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:50,997 INFO L82 PathProgramCache]: Analyzing trace with hash -904360455, now seen corresponding path program 17 times [2018-07-23 23:40:50,997 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:50,997 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:50,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:50,998 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:40:50,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:51,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:51,303 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 171 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:51,303 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:51,303 INFO L221 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 [2018-07-23 23:40:51,311 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:40:51,350 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-07-23 23:40:51,351 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:40:51,353 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:52,093 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 171 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:52,113 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:52,113 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 46 [2018-07-23 23:40:52,113 INFO L450 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-07-23 23:40:52,114 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-07-23 23:40:52,114 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=1649, Unknown=0, NotChecked=0, Total=2070 [2018-07-23 23:40:52,114 INFO L87 Difference]: Start difference. First operand 96 states and 107 transitions. Second operand 46 states. [2018-07-23 23:40:53,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:53,117 INFO L93 Difference]: Finished difference Result 203 states and 216 transitions. [2018-07-23 23:40:53,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-07-23 23:40:53,117 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 68 [2018-07-23 23:40:53,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:53,118 INFO L225 Difference]: With dead ends: 203 [2018-07-23 23:40:53,118 INFO L226 Difference]: Without dead ends: 158 [2018-07-23 23:40:53,119 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1340 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=905, Invalid=3651, Unknown=0, NotChecked=0, Total=4556 [2018-07-23 23:40:53,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-07-23 23:40:53,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 98. [2018-07-23 23:40:53,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-07-23 23:40:53,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 109 transitions. [2018-07-23 23:40:53,271 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 109 transitions. Word has length 68 [2018-07-23 23:40:53,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:53,271 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 109 transitions. [2018-07-23 23:40:53,271 INFO L472 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-07-23 23:40:53,271 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 109 transitions. [2018-07-23 23:40:53,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-07-23 23:40:53,272 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:53,272 INFO L353 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:53,272 INFO L414 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:53,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1644757893, now seen corresponding path program 29 times [2018-07-23 23:40:53,272 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:53,272 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:53,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:53,273 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:40:53,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:53,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:53,523 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 171 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:53,523 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:53,523 INFO L221 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 [2018-07-23 23:40:53,532 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:40:53,565 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-07-23 23:40:53,565 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:40:53,568 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:54,026 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 171 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:54,047 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:54,047 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 45 [2018-07-23 23:40:54,048 INFO L450 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-07-23 23:40:54,048 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-07-23 23:40:54,048 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=1589, Unknown=0, NotChecked=0, Total=1980 [2018-07-23 23:40:54,048 INFO L87 Difference]: Start difference. First operand 98 states and 109 transitions. Second operand 45 states. [2018-07-23 23:40:55,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:55,514 INFO L93 Difference]: Finished difference Result 263 states and 277 transitions. [2018-07-23 23:40:55,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-07-23 23:40:55,514 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 68 [2018-07-23 23:40:55,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:55,515 INFO L225 Difference]: With dead ends: 263 [2018-07-23 23:40:55,515 INFO L226 Difference]: Without dead ends: 218 [2018-07-23 23:40:55,516 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1723 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1081, Invalid=4619, Unknown=0, NotChecked=0, Total=5700 [2018-07-23 23:40:55,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2018-07-23 23:40:55,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 98. [2018-07-23 23:40:55,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-07-23 23:40:55,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 109 transitions. [2018-07-23 23:40:55,662 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 109 transitions. Word has length 68 [2018-07-23 23:40:55,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:55,662 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 109 transitions. [2018-07-23 23:40:55,662 INFO L472 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-07-23 23:40:55,662 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 109 transitions. [2018-07-23 23:40:55,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-07-23 23:40:55,663 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:55,663 INFO L353 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 8, 7, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:55,663 INFO L414 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:55,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1920035857, now seen corresponding path program 30 times [2018-07-23 23:40:55,663 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:55,663 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:55,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:55,664 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:40:55,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:55,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:55,949 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 171 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:55,949 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:55,949 INFO L221 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 [2018-07-23 23:40:55,957 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:40:56,026 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-07-23 23:40:56,026 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:40:56,028 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:56,437 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 171 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:56,459 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:56,459 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 44 [2018-07-23 23:40:56,459 INFO L450 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-07-23 23:40:56,459 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-07-23 23:40:56,459 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=1527, Unknown=0, NotChecked=0, Total=1892 [2018-07-23 23:40:56,460 INFO L87 Difference]: Start difference. First operand 98 states and 109 transitions. Second operand 44 states. [2018-07-23 23:40:58,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:58,203 INFO L93 Difference]: Finished difference Result 321 states and 336 transitions. [2018-07-23 23:40:58,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-07-23 23:40:58,203 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 68 [2018-07-23 23:40:58,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:58,204 INFO L225 Difference]: With dead ends: 321 [2018-07-23 23:40:58,205 INFO L226 Difference]: Without dead ends: 276 [2018-07-23 23:40:58,205 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2057 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1234, Invalid=5408, Unknown=0, NotChecked=0, Total=6642 [2018-07-23 23:40:58,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2018-07-23 23:40:58,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 98. [2018-07-23 23:40:58,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-07-23 23:40:58,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 109 transitions. [2018-07-23 23:40:58,354 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 109 transitions. Word has length 68 [2018-07-23 23:40:58,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:58,354 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 109 transitions. [2018-07-23 23:40:58,354 INFO L472 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-07-23 23:40:58,354 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 109 transitions. [2018-07-23 23:40:58,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-07-23 23:40:58,355 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:58,355 INFO L353 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 7, 6, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:58,355 INFO L414 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:58,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1900902499, now seen corresponding path program 31 times [2018-07-23 23:40:58,355 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:58,356 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:58,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:58,356 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:40:58,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:58,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:58,615 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 171 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:58,615 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:58,615 INFO L221 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 [2018-07-23 23:40:58,624 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:40:58,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:58,654 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:59,057 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 171 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:59,078 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:59,078 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 43 [2018-07-23 23:40:59,078 INFO L450 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-07-23 23:40:59,079 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-07-23 23:40:59,079 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=1463, Unknown=0, NotChecked=0, Total=1806 [2018-07-23 23:40:59,079 INFO L87 Difference]: Start difference. First operand 98 states and 109 transitions. Second operand 43 states. [2018-07-23 23:41:00,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:00,960 INFO L93 Difference]: Finished difference Result 377 states and 393 transitions. [2018-07-23 23:41:00,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-07-23 23:41:00,960 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 68 [2018-07-23 23:41:00,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:00,962 INFO L225 Difference]: With dead ends: 377 [2018-07-23 23:41:00,962 INFO L226 Difference]: Without dead ends: 332 [2018-07-23 23:41:00,962 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2304 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1346, Invalid=5964, Unknown=0, NotChecked=0, Total=7310 [2018-07-23 23:41:00,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2018-07-23 23:41:01,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 98. [2018-07-23 23:41:01,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-07-23 23:41:01,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 109 transitions. [2018-07-23 23:41:01,115 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 109 transitions. Word has length 68 [2018-07-23 23:41:01,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:01,116 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 109 transitions. [2018-07-23 23:41:01,116 INFO L472 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-07-23 23:41:01,116 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 109 transitions. [2018-07-23 23:41:01,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-07-23 23:41:01,116 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:01,116 INFO L353 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 6, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:01,116 INFO L414 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:01,116 INFO L82 PathProgramCache]: Analyzing trace with hash 727520809, now seen corresponding path program 32 times [2018-07-23 23:41:01,117 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:01,117 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:01,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:01,117 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:41:01,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:01,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:01,375 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 171 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:41:01,375 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:01,376 INFO L221 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 [2018-07-23 23:41:01,384 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:41:01,411 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:41:01,411 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:41:01,413 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:01,780 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 171 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:41:01,799 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:01,800 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 42 [2018-07-23 23:41:01,800 INFO L450 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-07-23 23:41:01,800 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-07-23 23:41:01,800 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=1397, Unknown=0, NotChecked=0, Total=1722 [2018-07-23 23:41:01,801 INFO L87 Difference]: Start difference. First operand 98 states and 109 transitions. Second operand 42 states. [2018-07-23 23:41:04,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:04,030 INFO L93 Difference]: Finished difference Result 431 states and 448 transitions. [2018-07-23 23:41:04,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-07-23 23:41:04,030 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 68 [2018-07-23 23:41:04,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:04,031 INFO L225 Difference]: With dead ends: 431 [2018-07-23 23:41:04,031 INFO L226 Difference]: Without dead ends: 386 [2018-07-23 23:41:04,032 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2438 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1405, Invalid=6251, Unknown=0, NotChecked=0, Total=7656 [2018-07-23 23:41:04,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2018-07-23 23:41:04,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 98. [2018-07-23 23:41:04,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-07-23 23:41:04,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 109 transitions. [2018-07-23 23:41:04,176 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 109 transitions. Word has length 68 [2018-07-23 23:41:04,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:04,177 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 109 transitions. [2018-07-23 23:41:04,177 INFO L472 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-07-23 23:41:04,177 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 109 transitions. [2018-07-23 23:41:04,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-07-23 23:41:04,177 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:04,178 INFO L353 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 6, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:04,178 INFO L414 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:04,178 INFO L82 PathProgramCache]: Analyzing trace with hash 707909557, now seen corresponding path program 33 times [2018-07-23 23:41:04,178 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:04,178 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:04,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:04,179 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:41:04,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:04,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:04,468 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 171 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:41:04,469 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:04,469 INFO L221 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 [2018-07-23 23:41:04,478 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:41:04,510 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-07-23 23:41:04,510 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:41:04,512 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:04,888 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 171 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:41:04,909 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:04,909 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 41 [2018-07-23 23:41:04,910 INFO L450 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-07-23 23:41:04,910 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-07-23 23:41:04,910 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=1329, Unknown=0, NotChecked=0, Total=1640 [2018-07-23 23:41:04,910 INFO L87 Difference]: Start difference. First operand 98 states and 109 transitions. Second operand 41 states. [2018-07-23 23:41:07,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:07,158 INFO L93 Difference]: Finished difference Result 483 states and 501 transitions. [2018-07-23 23:41:07,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-07-23 23:41:07,158 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 68 [2018-07-23 23:41:07,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:07,159 INFO L225 Difference]: With dead ends: 483 [2018-07-23 23:41:07,159 INFO L226 Difference]: Without dead ends: 438 [2018-07-23 23:41:07,160 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2445 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1405, Invalid=6251, Unknown=0, NotChecked=0, Total=7656 [2018-07-23 23:41:07,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2018-07-23 23:41:07,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 98. [2018-07-23 23:41:07,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-07-23 23:41:07,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 109 transitions. [2018-07-23 23:41:07,318 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 109 transitions. Word has length 68 [2018-07-23 23:41:07,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:07,318 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 109 transitions. [2018-07-23 23:41:07,319 INFO L472 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-07-23 23:41:07,319 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 109 transitions. [2018-07-23 23:41:07,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-07-23 23:41:07,319 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:07,319 INFO L353 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 7, 6, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:07,320 INFO L414 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:07,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1713474625, now seen corresponding path program 34 times [2018-07-23 23:41:07,320 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:07,320 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:07,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:07,321 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:41:07,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:07,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:07,628 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 171 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:41:07,628 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:07,628 INFO L221 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 [2018-07-23 23:41:07,635 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:41:07,664 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:41:07,664 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:41:07,666 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:08,036 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 171 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:41:08,057 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:08,057 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 40 [2018-07-23 23:41:08,057 INFO L450 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-07-23 23:41:08,057 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-07-23 23:41:08,058 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=1259, Unknown=0, NotChecked=0, Total=1560 [2018-07-23 23:41:08,058 INFO L87 Difference]: Start difference. First operand 98 states and 109 transitions. Second operand 40 states. [2018-07-23 23:41:10,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:10,394 INFO L93 Difference]: Finished difference Result 533 states and 552 transitions. [2018-07-23 23:41:10,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-07-23 23:41:10,394 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 68 [2018-07-23 23:41:10,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:10,396 INFO L225 Difference]: With dead ends: 533 [2018-07-23 23:41:10,396 INFO L226 Difference]: Without dead ends: 488 [2018-07-23 23:41:10,397 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2319 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1346, Invalid=5964, Unknown=0, NotChecked=0, Total=7310 [2018-07-23 23:41:10,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2018-07-23 23:41:10,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 98. [2018-07-23 23:41:10,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-07-23 23:41:10,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 109 transitions. [2018-07-23 23:41:10,565 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 109 transitions. Word has length 68 [2018-07-23 23:41:10,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:10,565 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 109 transitions. [2018-07-23 23:41:10,565 INFO L472 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-07-23 23:41:10,565 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 109 transitions. [2018-07-23 23:41:10,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-07-23 23:41:10,565 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:10,565 INFO L353 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 8, 7, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:10,566 INFO L414 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:10,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1062007757, now seen corresponding path program 35 times [2018-07-23 23:41:10,566 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:10,566 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:10,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:10,566 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:41:10,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:10,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:10,808 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 171 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:41:10,808 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:10,808 INFO L221 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 [2018-07-23 23:41:10,815 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:41:10,848 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-07-23 23:41:10,848 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:41:10,850 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:11,175 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 171 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:41:11,196 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:11,196 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 39 [2018-07-23 23:41:11,197 INFO L450 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-07-23 23:41:11,197 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-07-23 23:41:11,197 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=1187, Unknown=0, NotChecked=0, Total=1482 [2018-07-23 23:41:11,197 INFO L87 Difference]: Start difference. First operand 98 states and 109 transitions. Second operand 39 states. [2018-07-23 23:41:13,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:13,761 INFO L93 Difference]: Finished difference Result 581 states and 601 transitions. [2018-07-23 23:41:13,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-07-23 23:41:13,762 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 68 [2018-07-23 23:41:13,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:13,764 INFO L225 Difference]: With dead ends: 581 [2018-07-23 23:41:13,764 INFO L226 Difference]: Without dead ends: 536 [2018-07-23 23:41:13,765 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2062 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1234, Invalid=5408, Unknown=0, NotChecked=0, Total=6642 [2018-07-23 23:41:13,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2018-07-23 23:41:13,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 98. [2018-07-23 23:41:13,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-07-23 23:41:13,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 109 transitions. [2018-07-23 23:41:13,939 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 109 transitions. Word has length 68 [2018-07-23 23:41:13,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:13,939 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 109 transitions. [2018-07-23 23:41:13,939 INFO L472 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-07-23 23:41:13,939 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 109 transitions. [2018-07-23 23:41:13,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-07-23 23:41:13,939 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:13,939 INFO L353 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:13,939 INFO L414 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:13,940 INFO L82 PathProgramCache]: Analyzing trace with hash 654626393, now seen corresponding path program 36 times [2018-07-23 23:41:13,940 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:13,940 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:13,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:13,941 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:41:13,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:13,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:14,273 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 171 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:41:14,274 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:14,274 INFO L221 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 [2018-07-23 23:41:14,282 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:41:14,321 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-07-23 23:41:14,321 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:41:14,323 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:14,637 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 171 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:41:14,657 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:14,657 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 38 [2018-07-23 23:41:14,658 INFO L450 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-07-23 23:41:14,658 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-07-23 23:41:14,658 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=1113, Unknown=0, NotChecked=0, Total=1406 [2018-07-23 23:41:14,658 INFO L87 Difference]: Start difference. First operand 98 states and 109 transitions. Second operand 38 states. [2018-07-23 23:41:17,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:17,039 INFO L93 Difference]: Finished difference Result 627 states and 648 transitions. [2018-07-23 23:41:17,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-07-23 23:41:17,039 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 68 [2018-07-23 23:41:17,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:17,041 INFO L225 Difference]: With dead ends: 627 [2018-07-23 23:41:17,041 INFO L226 Difference]: Without dead ends: 582 [2018-07-23 23:41:17,042 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1688 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1081, Invalid=4619, Unknown=0, NotChecked=0, Total=5700 [2018-07-23 23:41:17,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2018-07-23 23:41:17,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 98. [2018-07-23 23:41:17,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-07-23 23:41:17,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 109 transitions. [2018-07-23 23:41:17,209 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 109 transitions. Word has length 68 [2018-07-23 23:41:17,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:17,210 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 109 transitions. [2018-07-23 23:41:17,210 INFO L472 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-07-23 23:41:17,210 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 109 transitions. [2018-07-23 23:41:17,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-07-23 23:41:17,210 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:17,211 INFO L353 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:17,211 INFO L414 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:17,211 INFO L82 PathProgramCache]: Analyzing trace with hash 734649317, now seen corresponding path program 9 times [2018-07-23 23:41:17,211 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:17,211 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:17,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:17,212 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:41:17,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:17,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:17,743 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 171 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:41:17,743 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:17,743 INFO L221 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 [2018-07-23 23:41:17,767 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:41:17,804 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-07-23 23:41:17,805 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:41:17,807 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:18,144 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 171 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:41:18,164 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:18,164 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 37 [2018-07-23 23:41:18,165 INFO L450 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-07-23 23:41:18,165 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-07-23 23:41:18,165 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=1037, Unknown=0, NotChecked=0, Total=1332 [2018-07-23 23:41:18,165 INFO L87 Difference]: Start difference. First operand 98 states and 109 transitions. Second operand 37 states. [2018-07-23 23:41:20,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:20,553 INFO L93 Difference]: Finished difference Result 676 states and 699 transitions. [2018-07-23 23:41:20,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-07-23 23:41:20,553 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 68 [2018-07-23 23:41:20,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:20,555 INFO L225 Difference]: With dead ends: 676 [2018-07-23 23:41:20,555 INFO L226 Difference]: Without dead ends: 631 [2018-07-23 23:41:20,556 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1223 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=905, Invalid=3651, Unknown=0, NotChecked=0, Total=4556 [2018-07-23 23:41:20,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2018-07-23 23:41:20,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 101. [2018-07-23 23:41:20,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-07-23 23:41:20,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 113 transitions. [2018-07-23 23:41:20,740 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 113 transitions. Word has length 68 [2018-07-23 23:41:20,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:20,741 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 113 transitions. [2018-07-23 23:41:20,741 INFO L472 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-07-23 23:41:20,741 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 113 transitions. [2018-07-23 23:41:20,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-07-23 23:41:20,741 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:20,741 INFO L353 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:20,741 INFO L414 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:20,742 INFO L82 PathProgramCache]: Analyzing trace with hash -492584077, now seen corresponding path program 18 times [2018-07-23 23:41:20,742 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:20,742 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:20,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:20,743 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:41:20,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:20,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:20,912 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 110 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:41:20,913 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:20,913 INFO L221 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 [2018-07-23 23:41:20,920 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:41:20,971 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-07-23 23:41:20,972 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:41:20,973 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:21,024 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 110 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:41:21,044 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:21,044 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2018-07-23 23:41:21,044 INFO L450 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-07-23 23:41:21,045 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-07-23 23:41:21,045 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2018-07-23 23:41:21,045 INFO L87 Difference]: Start difference. First operand 101 states and 113 transitions. Second operand 16 states. [2018-07-23 23:41:21,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:21,536 INFO L93 Difference]: Finished difference Result 114 states and 126 transitions. [2018-07-23 23:41:21,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-07-23 23:41:21,536 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 70 [2018-07-23 23:41:21,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:21,537 INFO L225 Difference]: With dead ends: 114 [2018-07-23 23:41:21,537 INFO L226 Difference]: Without dead ends: 112 [2018-07-23 23:41:21,537 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=277, Invalid=479, Unknown=0, NotChecked=0, Total=756 [2018-07-23 23:41:21,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-07-23 23:41:21,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 105. [2018-07-23 23:41:21,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-07-23 23:41:21,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 117 transitions. [2018-07-23 23:41:21,721 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 117 transitions. Word has length 70 [2018-07-23 23:41:21,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:21,721 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 117 transitions. [2018-07-23 23:41:21,721 INFO L472 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-07-23 23:41:21,721 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 117 transitions. [2018-07-23 23:41:21,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-07-23 23:41:21,721 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:21,721 INFO L353 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:21,722 INFO L414 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:21,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1538237252, now seen corresponding path program 19 times [2018-07-23 23:41:21,722 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:21,722 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:21,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:21,723 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:41:21,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:21,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:22,032 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 210 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:41:22,032 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:22,032 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:41:22,040 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:41:22,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:22,072 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:22,817 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 210 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:41:22,838 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:22,838 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 50 [2018-07-23 23:41:22,838 INFO L450 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-07-23 23:41:22,839 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-07-23 23:41:22,839 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=495, Invalid=1955, Unknown=0, NotChecked=0, Total=2450 [2018-07-23 23:41:22,839 INFO L87 Difference]: Start difference. First operand 105 states and 117 transitions. Second operand 50 states. [2018-07-23 23:41:24,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:24,145 INFO L93 Difference]: Finished difference Result 222 states and 236 transitions. [2018-07-23 23:41:24,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-07-23 23:41:24,145 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 74 [2018-07-23 23:41:24,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:24,146 INFO L225 Difference]: With dead ends: 222 [2018-07-23 23:41:24,146 INFO L226 Difference]: Without dead ends: 173 [2018-07-23 23:41:24,147 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1623 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1059, Invalid=4343, Unknown=0, NotChecked=0, Total=5402 [2018-07-23 23:41:24,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-07-23 23:41:24,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 107. [2018-07-23 23:41:24,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-07-23 23:41:24,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2018-07-23 23:41:24,343 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 74 [2018-07-23 23:41:24,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:24,343 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2018-07-23 23:41:24,344 INFO L472 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-07-23 23:41:24,344 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2018-07-23 23:41:24,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-07-23 23:41:24,344 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:24,344 INFO L353 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:24,344 INFO L414 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:24,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1354925752, now seen corresponding path program 37 times [2018-07-23 23:41:24,344 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:24,345 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:24,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:24,345 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:41:24,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:24,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:24,664 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 210 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:41:24,664 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:24,664 INFO L221 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 [2018-07-23 23:41:24,671 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:41:24,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:24,703 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:25,215 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 210 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:41:25,237 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:25,237 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 49 [2018-07-23 23:41:25,237 INFO L450 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-07-23 23:41:25,237 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-07-23 23:41:25,238 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=462, Invalid=1890, Unknown=0, NotChecked=0, Total=2352 [2018-07-23 23:41:25,238 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand 49 states. [2018-07-23 23:41:27,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:27,022 INFO L93 Difference]: Finished difference Result 288 states and 303 transitions. [2018-07-23 23:41:27,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-07-23 23:41:27,022 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 74 [2018-07-23 23:41:27,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:27,023 INFO L225 Difference]: With dead ends: 288 [2018-07-23 23:41:27,023 INFO L226 Difference]: Without dead ends: 239 [2018-07-23 23:41:27,024 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2099 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1275, Invalid=5531, Unknown=0, NotChecked=0, Total=6806 [2018-07-23 23:41:27,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2018-07-23 23:41:27,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 107. [2018-07-23 23:41:27,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-07-23 23:41:27,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2018-07-23 23:41:27,235 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 74 [2018-07-23 23:41:27,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:27,235 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2018-07-23 23:41:27,235 INFO L472 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-07-23 23:41:27,235 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2018-07-23 23:41:27,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-07-23 23:41:27,236 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:27,236 INFO L353 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 9, 8, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:27,236 INFO L414 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:27,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1201686740, now seen corresponding path program 38 times [2018-07-23 23:41:27,236 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:27,236 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:27,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:27,237 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:41:27,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:27,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:28,817 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 210 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:41:28,818 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:28,818 INFO L221 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 [2018-07-23 23:41:28,825 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:41:28,855 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:41:28,855 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:41:28,857 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:29,866 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 210 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:41:29,886 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:29,886 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 48 [2018-07-23 23:41:29,886 INFO L450 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-07-23 23:41:29,886 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-07-23 23:41:29,887 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=433, Invalid=1823, Unknown=0, NotChecked=0, Total=2256 [2018-07-23 23:41:29,887 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand 48 states. [2018-07-23 23:41:32,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:32,087 INFO L93 Difference]: Finished difference Result 352 states and 368 transitions. [2018-07-23 23:41:32,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-07-23 23:41:32,087 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 74 [2018-07-23 23:41:32,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:32,089 INFO L225 Difference]: With dead ends: 352 [2018-07-23 23:41:32,089 INFO L226 Difference]: Without dead ends: 303 [2018-07-23 23:41:32,090 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2531 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1471, Invalid=6539, Unknown=0, NotChecked=0, Total=8010 [2018-07-23 23:41:32,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2018-07-23 23:41:32,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 107. [2018-07-23 23:41:32,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-07-23 23:41:32,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2018-07-23 23:41:32,318 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 74 [2018-07-23 23:41:32,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:32,318 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2018-07-23 23:41:32,318 INFO L472 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-07-23 23:41:32,318 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2018-07-23 23:41:32,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-07-23 23:41:32,319 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:32,319 INFO L353 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 8, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:32,319 INFO L414 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:32,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1521906848, now seen corresponding path program 39 times [2018-07-23 23:41:32,319 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:32,320 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:32,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:32,320 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:41:32,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:32,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:33,150 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 210 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:41:33,150 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:33,150 INFO L221 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 [2018-07-23 23:41:33,160 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:41:33,196 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-07-23 23:41:33,197 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:41:33,199 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:34,603 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 210 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:41:34,623 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:34,623 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 47 [2018-07-23 23:41:34,624 INFO L450 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-07-23 23:41:34,624 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-07-23 23:41:34,624 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=1754, Unknown=0, NotChecked=0, Total=2162 [2018-07-23 23:41:34,624 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand 47 states. [2018-07-23 23:41:37,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:37,143 INFO L93 Difference]: Finished difference Result 414 states and 431 transitions. [2018-07-23 23:41:37,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-07-23 23:41:37,143 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 74 [2018-07-23 23:41:37,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:37,145 INFO L225 Difference]: With dead ends: 414 [2018-07-23 23:41:37,145 INFO L226 Difference]: Without dead ends: 365 [2018-07-23 23:41:37,146 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2875 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1626, Invalid=7304, Unknown=0, NotChecked=0, Total=8930 [2018-07-23 23:41:37,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2018-07-23 23:41:37,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 107. [2018-07-23 23:41:37,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-07-23 23:41:37,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2018-07-23 23:41:37,370 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 74 [2018-07-23 23:41:37,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:37,370 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2018-07-23 23:41:37,370 INFO L472 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-07-23 23:41:37,370 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2018-07-23 23:41:37,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-07-23 23:41:37,370 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:37,370 INFO L353 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 7, 6, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:37,371 INFO L414 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:37,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1027211500, now seen corresponding path program 40 times [2018-07-23 23:41:37,371 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:37,371 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:37,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:37,372 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:41:37,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:37,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:37,643 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 210 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:41:37,643 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:37,644 INFO L221 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 [2018-07-23 23:41:37,651 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:41:37,682 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:41:37,682 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:41:37,684 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:38,485 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 210 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:41:38,505 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:38,506 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 46 [2018-07-23 23:41:38,506 INFO L450 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-07-23 23:41:38,506 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-07-23 23:41:38,507 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=1683, Unknown=0, NotChecked=0, Total=2070 [2018-07-23 23:41:38,507 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand 46 states. [2018-07-23 23:41:41,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:41,230 INFO L93 Difference]: Finished difference Result 474 states and 492 transitions. [2018-07-23 23:41:41,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-07-23 23:41:41,230 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 74 [2018-07-23 23:41:41,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:41,232 INFO L225 Difference]: With dead ends: 474 [2018-07-23 23:41:41,232 INFO L226 Difference]: Without dead ends: 425 [2018-07-23 23:41:41,233 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3099 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1725, Invalid=7781, Unknown=0, NotChecked=0, Total=9506 [2018-07-23 23:41:41,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2018-07-23 23:41:41,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 107. [2018-07-23 23:41:41,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-07-23 23:41:41,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2018-07-23 23:41:41,461 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 74 [2018-07-23 23:41:41,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:41,461 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2018-07-23 23:41:41,461 INFO L472 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-07-23 23:41:41,461 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2018-07-23 23:41:41,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-07-23 23:41:41,461 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:41,462 INFO L353 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:41,462 INFO L414 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:41,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1302489464, now seen corresponding path program 41 times [2018-07-23 23:41:41,462 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:41,462 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:41,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:41,463 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:41:41,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:41,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:41,855 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 210 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:41:41,855 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:41,855 INFO L221 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 [2018-07-23 23:41:41,862 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:41:41,898 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2018-07-23 23:41:41,899 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:41:41,900 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:42,360 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 210 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:41:42,380 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:42,380 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 45 [2018-07-23 23:41:42,380 INFO L450 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-07-23 23:41:42,380 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-07-23 23:41:42,380 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=1610, Unknown=0, NotChecked=0, Total=1980 [2018-07-23 23:41:42,381 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand 45 states. [2018-07-23 23:41:45,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:45,533 INFO L93 Difference]: Finished difference Result 532 states and 551 transitions. [2018-07-23 23:41:45,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-07-23 23:41:45,534 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 74 [2018-07-23 23:41:45,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:45,535 INFO L225 Difference]: With dead ends: 532 [2018-07-23 23:41:45,535 INFO L226 Difference]: Without dead ends: 483 [2018-07-23 23:41:45,536 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3183 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1759, Invalid=7943, Unknown=0, NotChecked=0, Total=9702 [2018-07-23 23:41:45,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2018-07-23 23:41:45,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 107. [2018-07-23 23:41:45,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-07-23 23:41:45,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2018-07-23 23:41:45,787 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 74 [2018-07-23 23:41:45,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:45,788 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2018-07-23 23:41:45,788 INFO L472 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-07-23 23:41:45,788 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2018-07-23 23:41:45,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-07-23 23:41:45,788 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:45,788 INFO L353 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 7, 6, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:45,788 INFO L414 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:45,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1776518404, now seen corresponding path program 42 times [2018-07-23 23:41:45,789 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:45,789 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:45,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:45,789 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:41:45,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:45,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:46,092 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 210 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:41:46,092 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:46,092 INFO L221 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 [2018-07-23 23:41:46,100 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:41:46,137 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-07-23 23:41:46,137 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:41:46,140 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:46,535 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 210 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:41:46,555 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:46,555 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 44 [2018-07-23 23:41:46,556 INFO L450 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-07-23 23:41:46,556 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-07-23 23:41:46,556 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=1535, Unknown=0, NotChecked=0, Total=1892 [2018-07-23 23:41:46,556 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand 44 states. [2018-07-23 23:41:49,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:49,802 INFO L93 Difference]: Finished difference Result 588 states and 608 transitions. [2018-07-23 23:41:49,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-07-23 23:41:49,803 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 74 [2018-07-23 23:41:49,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:49,804 INFO L225 Difference]: With dead ends: 588 [2018-07-23 23:41:49,804 INFO L226 Difference]: Without dead ends: 539 [2018-07-23 23:41:49,805 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3118 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1725, Invalid=7781, Unknown=0, NotChecked=0, Total=9506 [2018-07-23 23:41:49,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2018-07-23 23:41:50,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 107. [2018-07-23 23:41:50,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-07-23 23:41:50,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2018-07-23 23:41:50,050 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 74 [2018-07-23 23:41:50,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:50,050 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2018-07-23 23:41:50,050 INFO L472 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-07-23 23:41:50,050 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2018-07-23 23:41:50,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-07-23 23:41:50,050 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:50,050 INFO L353 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 8, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:50,051 INFO L414 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:50,051 INFO L82 PathProgramCache]: Analyzing trace with hash 109974416, now seen corresponding path program 43 times [2018-07-23 23:41:50,051 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:50,051 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:50,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:50,051 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:41:50,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:50,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:50,321 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 210 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:41:50,322 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:50,322 INFO L221 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 [2018-07-23 23:41:50,328 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:41:50,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:50,359 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:50,758 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 210 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:41:50,779 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:50,779 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 43 [2018-07-23 23:41:50,779 INFO L450 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-07-23 23:41:50,779 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-07-23 23:41:50,779 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=1458, Unknown=0, NotChecked=0, Total=1806 [2018-07-23 23:41:50,780 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand 43 states. [2018-07-23 23:41:54,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:54,185 INFO L93 Difference]: Finished difference Result 642 states and 663 transitions. [2018-07-23 23:41:54,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-07-23 23:41:54,185 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 74 [2018-07-23 23:41:54,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:54,187 INFO L225 Difference]: With dead ends: 642 [2018-07-23 23:41:54,187 INFO L226 Difference]: Without dead ends: 593 [2018-07-23 23:41:54,187 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2901 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1626, Invalid=7304, Unknown=0, NotChecked=0, Total=8930 [2018-07-23 23:41:54,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2018-07-23 23:41:54,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 107. [2018-07-23 23:41:54,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-07-23 23:41:54,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2018-07-23 23:41:54,438 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 74 [2018-07-23 23:41:54,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:54,438 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2018-07-23 23:41:54,438 INFO L472 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-07-23 23:41:54,438 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2018-07-23 23:41:54,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-07-23 23:41:54,439 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:54,439 INFO L353 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 9, 8, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:54,439 INFO L414 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:54,439 INFO L82 PathProgramCache]: Analyzing trace with hash 90363164, now seen corresponding path program 44 times [2018-07-23 23:41:54,439 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:54,439 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:54,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:54,440 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:41:54,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:54,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:54,865 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 210 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:41:54,865 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:54,865 INFO L221 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 [2018-07-23 23:41:54,871 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:41:54,902 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:41:54,902 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:41:54,904 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:55,266 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 210 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:41:55,286 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:55,287 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 42 [2018-07-23 23:41:55,287 INFO L450 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-07-23 23:41:55,287 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-07-23 23:41:55,287 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=1379, Unknown=0, NotChecked=0, Total=1722 [2018-07-23 23:41:55,288 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand 42 states. [2018-07-23 23:41:58,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:58,713 INFO L93 Difference]: Finished difference Result 694 states and 716 transitions. [2018-07-23 23:41:58,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-07-23 23:41:58,713 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 74 [2018-07-23 23:41:58,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:58,715 INFO L225 Difference]: With dead ends: 694 [2018-07-23 23:41:58,715 INFO L226 Difference]: Without dead ends: 645 [2018-07-23 23:41:58,716 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2540 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1471, Invalid=6539, Unknown=0, NotChecked=0, Total=8010 [2018-07-23 23:41:58,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2018-07-23 23:41:58,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 107. [2018-07-23 23:41:58,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-07-23 23:41:58,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2018-07-23 23:41:58,949 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 74 [2018-07-23 23:41:58,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:58,949 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2018-07-23 23:41:58,949 INFO L472 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-07-23 23:41:58,949 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2018-07-23 23:41:58,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-07-23 23:41:58,949 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:58,950 INFO L353 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:58,950 INFO L414 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:58,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1095928232, now seen corresponding path program 45 times [2018-07-23 23:41:58,950 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:58,950 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:58,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:58,951 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:41:58,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:58,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:59,215 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 210 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:41:59,216 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:59,216 INFO L221 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 [2018-07-23 23:41:59,223 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:41:59,265 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-07-23 23:41:59,265 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:41:59,268 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:59,628 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 210 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:41:59,649 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:59,649 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 41 [2018-07-23 23:41:59,649 INFO L450 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-07-23 23:41:59,649 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-07-23 23:41:59,649 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=342, Invalid=1298, Unknown=0, NotChecked=0, Total=1640 [2018-07-23 23:41:59,650 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand 41 states. [2018-07-23 23:42:02,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:42:02,979 INFO L93 Difference]: Finished difference Result 744 states and 767 transitions. [2018-07-23 23:42:02,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-07-23 23:42:02,979 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 74 [2018-07-23 23:42:02,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:42:02,981 INFO L225 Difference]: With dead ends: 744 [2018-07-23 23:42:02,981 INFO L226 Difference]: Without dead ends: 695 [2018-07-23 23:42:02,981 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2055 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1275, Invalid=5531, Unknown=0, NotChecked=0, Total=6806 [2018-07-23 23:42:02,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2018-07-23 23:42:03,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 107. [2018-07-23 23:42:03,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-07-23 23:42:03,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2018-07-23 23:42:03,235 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 74 [2018-07-23 23:42:03,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:42:03,235 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2018-07-23 23:42:03,235 INFO L472 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-07-23 23:42:03,235 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2018-07-23 23:42:03,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-07-23 23:42:03,236 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:42:03,236 INFO L353 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:42:03,236 INFO L414 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:42:03,236 INFO L82 PathProgramCache]: Analyzing trace with hash 444461364, now seen corresponding path program 10 times [2018-07-23 23:42:03,236 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:42:03,237 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:42:03,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:03,237 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:42:03,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:03,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:42:03,834 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 210 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:42:03,835 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:42:03,835 INFO L221 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 [2018-07-23 23:42:03,843 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:42:03,892 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:42:03,893 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:42:03,894 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:42:04,388 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 210 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:42:04,409 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:42:04,409 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 40 [2018-07-23 23:42:04,410 INFO L450 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-07-23 23:42:04,410 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-07-23 23:42:04,410 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=345, Invalid=1215, Unknown=0, NotChecked=0, Total=1560 [2018-07-23 23:42:04,410 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand 40 states. [2018-07-23 23:42:07,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:42:07,814 INFO L93 Difference]: Finished difference Result 797 states and 822 transitions. [2018-07-23 23:42:07,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-07-23 23:42:07,814 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 74 [2018-07-23 23:42:07,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:42:07,816 INFO L225 Difference]: With dead ends: 797 [2018-07-23 23:42:07,816 INFO L226 Difference]: Without dead ends: 748 [2018-07-23 23:42:07,817 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1478 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1059, Invalid=4343, Unknown=0, NotChecked=0, Total=5402 [2018-07-23 23:42:07,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2018-07-23 23:42:08,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 110. [2018-07-23 23:42:08,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-07-23 23:42:08,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 123 transitions. [2018-07-23 23:42:08,058 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 123 transitions. Word has length 74 [2018-07-23 23:42:08,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:42:08,058 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 123 transitions. [2018-07-23 23:42:08,058 INFO L472 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-07-23 23:42:08,058 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 123 transitions. [2018-07-23 23:42:08,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-07-23 23:42:08,059 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:42:08,059 INFO L353 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:42:08,059 INFO L414 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:42:08,059 INFO L82 PathProgramCache]: Analyzing trace with hash -929558858, now seen corresponding path program 20 times [2018-07-23 23:42:08,059 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:42:08,059 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:42:08,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:08,060 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:42:08,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:08,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:42:08,217 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 132 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:42:08,217 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:42:08,217 INFO L221 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 [2018-07-23 23:42:08,225 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:42:08,257 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:42:08,257 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:42:08,259 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:42:08,480 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 132 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:42:08,508 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:42:08,509 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2018-07-23 23:42:08,509 INFO L450 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-07-23 23:42:08,509 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-07-23 23:42:08,509 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2018-07-23 23:42:08,510 INFO L87 Difference]: Start difference. First operand 110 states and 123 transitions. Second operand 17 states. [2018-07-23 23:42:09,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:42:09,170 INFO L93 Difference]: Finished difference Result 123 states and 136 transitions. [2018-07-23 23:42:09,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-07-23 23:42:09,171 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 76 [2018-07-23 23:42:09,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:42:09,171 INFO L225 Difference]: With dead ends: 123 [2018-07-23 23:42:09,171 INFO L226 Difference]: Without dead ends: 121 [2018-07-23 23:42:09,172 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=319, Invalid=551, Unknown=0, NotChecked=0, Total=870 [2018-07-23 23:42:09,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-07-23 23:42:09,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 114. [2018-07-23 23:42:09,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-07-23 23:42:09,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 127 transitions. [2018-07-23 23:42:09,419 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 127 transitions. Word has length 76 [2018-07-23 23:42:09,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:42:09,419 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 127 transitions. [2018-07-23 23:42:09,419 INFO L472 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-07-23 23:42:09,419 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 127 transitions. [2018-07-23 23:42:09,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-07-23 23:42:09,420 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:42:09,420 INFO L353 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:42:09,420 INFO L414 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:42:09,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1797828993, now seen corresponding path program 21 times [2018-07-23 23:42:09,420 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:42:09,420 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:42:09,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:09,421 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:42:09,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:09,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:42:09,904 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 253 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:42:09,904 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:42:09,904 INFO L221 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 [2018-07-23 23:42:09,912 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:42:09,949 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-07-23 23:42:09,950 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:42:09,953 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:42:10,547 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 253 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:42:10,567 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:42:10,567 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 54 [2018-07-23 23:42:10,567 INFO L450 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-07-23 23:42:10,568 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-07-23 23:42:10,568 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=2287, Unknown=0, NotChecked=0, Total=2862 [2018-07-23 23:42:10,568 INFO L87 Difference]: Start difference. First operand 114 states and 127 transitions. Second operand 54 states. [2018-07-23 23:42:12,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:42:12,270 INFO L93 Difference]: Finished difference Result 241 states and 256 transitions. [2018-07-23 23:42:12,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-07-23 23:42:12,270 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 80 [2018-07-23 23:42:12,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:42:12,270 INFO L225 Difference]: With dead ends: 241 [2018-07-23 23:42:12,271 INFO L226 Difference]: Without dead ends: 188 [2018-07-23 23:42:12,271 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1933 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1225, Invalid=5095, Unknown=0, NotChecked=0, Total=6320 [2018-07-23 23:42:12,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2018-07-23 23:42:12,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 116. [2018-07-23 23:42:12,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-07-23 23:42:12,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 129 transitions. [2018-07-23 23:42:12,544 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 129 transitions. Word has length 80 [2018-07-23 23:42:12,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:42:12,545 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 129 transitions. [2018-07-23 23:42:12,545 INFO L472 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-07-23 23:42:12,545 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 129 transitions. [2018-07-23 23:42:12,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-07-23 23:42:12,545 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:42:12,545 INFO L353 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:42:12,545 INFO L414 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:42:12,546 INFO L82 PathProgramCache]: Analyzing trace with hash 375902731, now seen corresponding path program 46 times [2018-07-23 23:42:12,546 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:42:12,546 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:42:12,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:12,546 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:42:12,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:12,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:42:12,909 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 253 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:42:12,909 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:42:12,910 INFO L221 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 [2018-07-23 23:42:12,916 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:42:12,948 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:42:12,948 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:42:12,950 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:42:13,527 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 253 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:42:13,547 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:42:13,547 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 53 [2018-07-23 23:42:13,547 INFO L450 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-07-23 23:42:13,548 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-07-23 23:42:13,548 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=539, Invalid=2217, Unknown=0, NotChecked=0, Total=2756 [2018-07-23 23:42:13,548 INFO L87 Difference]: Start difference. First operand 116 states and 129 transitions. Second operand 53 states. [2018-07-23 23:42:15,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:42:15,887 INFO L93 Difference]: Finished difference Result 313 states and 329 transitions. [2018-07-23 23:42:15,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-07-23 23:42:15,887 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 80 [2018-07-23 23:42:15,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:42:15,888 INFO L225 Difference]: With dead ends: 313 [2018-07-23 23:42:15,888 INFO L226 Difference]: Without dead ends: 260 [2018-07-23 23:42:15,889 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2512 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1485, Invalid=6525, Unknown=0, NotChecked=0, Total=8010 [2018-07-23 23:42:15,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2018-07-23 23:42:16,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 116. [2018-07-23 23:42:16,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-07-23 23:42:16,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 129 transitions. [2018-07-23 23:42:16,210 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 129 transitions. Word has length 80 [2018-07-23 23:42:16,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:42:16,210 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 129 transitions. [2018-07-23 23:42:16,210 INFO L472 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-07-23 23:42:16,210 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 129 transitions. [2018-07-23 23:42:16,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-07-23 23:42:16,210 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:42:16,210 INFO L353 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 10, 9, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:42:16,210 INFO L414 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:42:16,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1964755095, now seen corresponding path program 47 times [2018-07-23 23:42:16,211 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:42:16,211 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:42:16,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:16,211 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:42:16,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:16,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:42:16,518 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 253 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:42:16,518 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:42:16,518 INFO L221 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 [2018-07-23 23:42:16,525 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:42:16,583 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-07-23 23:42:16,584 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:42:16,586 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:42:17,280 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 253 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:42:17,300 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:42:17,300 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 52 [2018-07-23 23:42:17,301 INFO L450 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-07-23 23:42:17,301 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-07-23 23:42:17,301 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=507, Invalid=2145, Unknown=0, NotChecked=0, Total=2652 [2018-07-23 23:42:17,301 INFO L87 Difference]: Start difference. First operand 116 states and 129 transitions. Second operand 52 states. [2018-07-23 23:42:20,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:42:20,448 INFO L93 Difference]: Finished difference Result 383 states and 400 transitions. [2018-07-23 23:42:20,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-07-23 23:42:20,448 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 80 [2018-07-23 23:42:20,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:42:20,449 INFO L225 Difference]: With dead ends: 383 [2018-07-23 23:42:20,449 INFO L226 Difference]: Without dead ends: 330 [2018-07-23 23:42:20,450 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3054 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1729, Invalid=7777, Unknown=0, NotChecked=0, Total=9506 [2018-07-23 23:42:20,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2018-07-23 23:42:20,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 116. [2018-07-23 23:42:20,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-07-23 23:42:20,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 129 transitions. [2018-07-23 23:42:20,792 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 129 transitions. Word has length 80 [2018-07-23 23:42:20,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:42:20,792 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 129 transitions. [2018-07-23 23:42:20,792 INFO L472 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-07-23 23:42:20,792 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 129 transitions. [2018-07-23 23:42:20,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-07-23 23:42:20,792 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:42:20,793 INFO L353 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 9, 8, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:42:20,793 INFO L414 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:42:20,793 INFO L82 PathProgramCache]: Analyzing trace with hash 2033447459, now seen corresponding path program 48 times [2018-07-23 23:42:20,793 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:42:20,793 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:42:20,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:20,794 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:42:20,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:20,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:42:21,125 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 253 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:42:21,126 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:42:21,126 INFO L221 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 [2018-07-23 23:42:21,133 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:42:21,172 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2018-07-23 23:42:21,172 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:42:21,174 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:42:21,752 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 253 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:42:21,772 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:42:21,772 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 51 [2018-07-23 23:42:21,773 INFO L450 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-07-23 23:42:21,773 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-07-23 23:42:21,773 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=479, Invalid=2071, Unknown=0, NotChecked=0, Total=2550 [2018-07-23 23:42:21,773 INFO L87 Difference]: Start difference. First operand 116 states and 129 transitions. Second operand 51 states. [2018-07-23 23:42:25,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:42:25,295 INFO L93 Difference]: Finished difference Result 451 states and 469 transitions. [2018-07-23 23:42:25,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-07-23 23:42:25,295 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 80 [2018-07-23 23:42:25,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:42:25,296 INFO L225 Difference]: With dead ends: 451 [2018-07-23 23:42:25,296 INFO L226 Difference]: Without dead ends: 398 [2018-07-23 23:42:25,297 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3509 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1933, Invalid=8779, Unknown=0, NotChecked=0, Total=10712 [2018-07-23 23:42:25,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2018-07-23 23:42:25,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 116. [2018-07-23 23:42:25,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-07-23 23:42:25,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 129 transitions. [2018-07-23 23:42:25,614 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 129 transitions. Word has length 80 [2018-07-23 23:42:25,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:42:25,614 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 129 transitions. [2018-07-23 23:42:25,615 INFO L472 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-07-23 23:42:25,615 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 129 transitions. [2018-07-23 23:42:25,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-07-23 23:42:25,615 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:42:25,615 INFO L353 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 8, 7, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:42:25,615 INFO L414 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:42:25,615 INFO L82 PathProgramCache]: Analyzing trace with hash -2078208337, now seen corresponding path program 49 times [2018-07-23 23:42:25,615 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:42:25,615 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:42:25,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:25,616 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:42:25,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:25,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:42:25,918 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 253 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:42:25,918 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:42:25,919 INFO L221 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 [2018-07-23 23:42:25,926 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:42:25,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:42:25,962 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:42:26,454 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 253 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:42:26,473 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:42:26,473 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 50 [2018-07-23 23:42:26,474 INFO L450 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-07-23 23:42:26,474 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-07-23 23:42:26,474 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=455, Invalid=1995, Unknown=0, NotChecked=0, Total=2450 [2018-07-23 23:42:26,474 INFO L87 Difference]: Start difference. First operand 116 states and 129 transitions. Second operand 50 states. [2018-07-23 23:42:30,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:42:30,328 INFO L93 Difference]: Finished difference Result 517 states and 536 transitions. [2018-07-23 23:42:30,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-07-23 23:42:30,328 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 80 [2018-07-23 23:42:30,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:42:30,329 INFO L225 Difference]: With dead ends: 517 [2018-07-23 23:42:30,329 INFO L226 Difference]: Without dead ends: 464 [2018-07-23 23:42:30,330 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3839 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2079, Invalid=9477, Unknown=0, NotChecked=0, Total=11556 [2018-07-23 23:42:30,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2018-07-23 23:42:30,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 116. [2018-07-23 23:42:30,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-07-23 23:42:30,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 129 transitions. [2018-07-23 23:42:30,641 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 129 transitions. Word has length 80 [2018-07-23 23:42:30,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:42:30,642 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 129 transitions. [2018-07-23 23:42:30,642 INFO L472 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-07-23 23:42:30,642 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 129 transitions. [2018-07-23 23:42:30,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-07-23 23:42:30,642 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:42:30,642 INFO L353 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 7, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:42:30,642 INFO L414 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:42:30,642 INFO L82 PathProgramCache]: Analyzing trace with hash 478404155, now seen corresponding path program 50 times [2018-07-23 23:42:30,643 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:42:30,643 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:42:30,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:30,643 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:42:30,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:30,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:42:31,165 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 253 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:42:31,165 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:42:31,165 INFO L221 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 [2018-07-23 23:42:31,172 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:42:31,200 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:42:31,200 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:42:31,202 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:42:31,722 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 253 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:42:31,743 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:42:31,743 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 49 [2018-07-23 23:42:31,743 INFO L450 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-07-23 23:42:31,744 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-07-23 23:42:31,744 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=1917, Unknown=0, NotChecked=0, Total=2352 [2018-07-23 23:42:31,744 INFO L87 Difference]: Start difference. First operand 116 states and 129 transitions. Second operand 49 states. [2018-07-23 23:42:35,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:42:35,996 INFO L93 Difference]: Finished difference Result 581 states and 601 transitions. [2018-07-23 23:42:35,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-07-23 23:42:35,996 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 80 [2018-07-23 23:42:35,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:42:35,998 INFO L225 Difference]: With dead ends: 581 [2018-07-23 23:42:35,998 INFO L226 Difference]: Without dead ends: 528 [2018-07-23 23:42:35,999 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4018 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2155, Invalid=9835, Unknown=0, NotChecked=0, Total=11990 [2018-07-23 23:42:35,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2018-07-23 23:42:36,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 116. [2018-07-23 23:42:36,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-07-23 23:42:36,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 129 transitions. [2018-07-23 23:42:36,344 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 129 transitions. Word has length 80 [2018-07-23 23:42:36,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:42:36,344 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 129 transitions. [2018-07-23 23:42:36,344 INFO L472 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-07-23 23:42:36,344 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 129 transitions. [2018-07-23 23:42:36,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-07-23 23:42:36,344 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:42:36,345 INFO L353 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 7, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:42:36,345 INFO L414 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:42:36,345 INFO L82 PathProgramCache]: Analyzing trace with hash 2049777863, now seen corresponding path program 51 times [2018-07-23 23:42:36,345 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:42:36,345 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:42:36,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:36,346 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:42:36,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:36,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:42:36,742 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 253 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:42:36,743 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:42:36,743 INFO L221 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 [2018-07-23 23:42:36,750 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:42:36,791 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-07-23 23:42:36,791 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:42:36,793 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:42:37,287 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 253 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:42:37,307 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:42:37,307 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 48 [2018-07-23 23:42:37,307 INFO L450 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-07-23 23:42:37,307 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-07-23 23:42:37,308 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1837, Unknown=0, NotChecked=0, Total=2256 [2018-07-23 23:42:37,308 INFO L87 Difference]: Start difference. First operand 116 states and 129 transitions. Second operand 48 states. [2018-07-23 23:42:41,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:42:41,870 INFO L93 Difference]: Finished difference Result 643 states and 664 transitions. [2018-07-23 23:42:41,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-07-23 23:42:41,870 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 80 [2018-07-23 23:42:41,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:42:41,872 INFO L225 Difference]: With dead ends: 643 [2018-07-23 23:42:41,872 INFO L226 Difference]: Without dead ends: 590 [2018-07-23 23:42:41,873 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4032 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2155, Invalid=9835, Unknown=0, NotChecked=0, Total=11990 [2018-07-23 23:42:41,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2018-07-23 23:42:42,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 116. [2018-07-23 23:42:42,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-07-23 23:42:42,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 129 transitions. [2018-07-23 23:42:42,241 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 129 transitions. Word has length 80 [2018-07-23 23:42:42,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:42:42,242 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 129 transitions. [2018-07-23 23:42:42,242 INFO L472 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-07-23 23:42:42,242 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 129 transitions. [2018-07-23 23:42:42,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-07-23 23:42:42,243 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:42:42,243 INFO L353 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 8, 7, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:42:42,243 INFO L414 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:42:42,244 INFO L82 PathProgramCache]: Analyzing trace with hash 303928915, now seen corresponding path program 52 times [2018-07-23 23:42:42,244 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:42:42,244 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:42:42,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:42,244 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:42:42,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:42,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:42:42,612 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 253 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:42:42,612 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:42:42,612 INFO L221 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 [2018-07-23 23:42:42,620 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:42:42,658 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:42:42,658 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:42:42,660 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:42:43,104 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 253 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:42:43,125 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:42:43,125 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 47 [2018-07-23 23:42:43,125 INFO L450 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-07-23 23:42:43,126 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-07-23 23:42:43,126 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=1755, Unknown=0, NotChecked=0, Total=2162 [2018-07-23 23:42:43,126 INFO L87 Difference]: Start difference. First operand 116 states and 129 transitions. Second operand 47 states. [2018-07-23 23:42:47,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:42:47,713 INFO L93 Difference]: Finished difference Result 703 states and 725 transitions. [2018-07-23 23:42:47,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-07-23 23:42:47,713 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 80 [2018-07-23 23:42:47,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:42:47,715 INFO L225 Difference]: With dead ends: 703 [2018-07-23 23:42:47,715 INFO L226 Difference]: Without dead ends: 650 [2018-07-23 23:42:47,716 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3875 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2079, Invalid=9477, Unknown=0, NotChecked=0, Total=11556 [2018-07-23 23:42:47,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2018-07-23 23:42:48,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 116. [2018-07-23 23:42:48,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-07-23 23:42:48,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 129 transitions. [2018-07-23 23:42:48,072 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 129 transitions. Word has length 80 [2018-07-23 23:42:48,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:42:48,072 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 129 transitions. [2018-07-23 23:42:48,073 INFO L472 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-07-23 23:42:48,073 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 129 transitions. [2018-07-23 23:42:48,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-07-23 23:42:48,073 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:42:48,073 INFO L353 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 9, 8, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:42:48,074 INFO L414 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:42:48,074 INFO L82 PathProgramCache]: Analyzing trace with hash 579206879, now seen corresponding path program 53 times [2018-07-23 23:42:48,074 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:42:48,074 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:42:48,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:48,075 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:42:48,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:48,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:42:48,407 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 253 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:42:48,407 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:42:48,407 INFO L221 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 [2018-07-23 23:42:48,416 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:42:48,460 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-07-23 23:42:48,460 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:42:48,462 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:42:48,902 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 253 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:42:48,924 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:42:48,924 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 46 [2018-07-23 23:42:48,924 INFO L450 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-07-23 23:42:48,925 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-07-23 23:42:48,925 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=1671, Unknown=0, NotChecked=0, Total=2070 [2018-07-23 23:42:48,925 INFO L87 Difference]: Start difference. First operand 116 states and 129 transitions. Second operand 46 states. [2018-07-23 23:42:53,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:42:53,528 INFO L93 Difference]: Finished difference Result 761 states and 784 transitions. [2018-07-23 23:42:53,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-07-23 23:42:53,529 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 80 [2018-07-23 23:42:53,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:42:53,531 INFO L225 Difference]: With dead ends: 761 [2018-07-23 23:42:53,531 INFO L226 Difference]: Without dead ends: 708 [2018-07-23 23:42:53,531 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3549 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1933, Invalid=8779, Unknown=0, NotChecked=0, Total=10712 [2018-07-23 23:42:53,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2018-07-23 23:42:53,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 116. [2018-07-23 23:42:53,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-07-23 23:42:53,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 129 transitions. [2018-07-23 23:42:53,874 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 129 transitions. Word has length 80 [2018-07-23 23:42:53,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:42:53,874 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 129 transitions. [2018-07-23 23:42:53,874 INFO L472 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-07-23 23:42:53,874 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 129 transitions. [2018-07-23 23:42:53,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-07-23 23:42:53,875 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:42:53,875 INFO L353 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 10, 9, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:42:53,875 INFO L414 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:42:53,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1053235819, now seen corresponding path program 54 times [2018-07-23 23:42:53,875 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:42:53,875 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:42:53,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:53,876 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:42:53,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:53,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:42:54,174 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 253 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:42:54,174 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:42:54,174 INFO L221 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 [2018-07-23 23:42:54,181 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:42:54,221 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2018-07-23 23:42:54,222 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:42:54,224 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:42:54,855 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 253 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:42:54,876 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:42:54,876 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 45 [2018-07-23 23:42:54,876 INFO L450 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-07-23 23:42:54,876 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-07-23 23:42:54,877 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=1585, Unknown=0, NotChecked=0, Total=1980 [2018-07-23 23:42:54,877 INFO L87 Difference]: Start difference. First operand 116 states and 129 transitions. Second operand 45 states. [2018-07-23 23:42:59,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:42:59,660 INFO L93 Difference]: Finished difference Result 817 states and 841 transitions. [2018-07-23 23:42:59,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-07-23 23:42:59,661 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 80 [2018-07-23 23:42:59,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:42:59,663 INFO L225 Difference]: With dead ends: 817 [2018-07-23 23:42:59,663 INFO L226 Difference]: Without dead ends: 764 [2018-07-23 23:42:59,663 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3068 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1729, Invalid=7777, Unknown=0, NotChecked=0, Total=9506 [2018-07-23 23:42:59,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2018-07-23 23:43:00,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 116. [2018-07-23 23:43:00,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-07-23 23:43:00,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 129 transitions. [2018-07-23 23:43:00,047 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 129 transitions. Word has length 80 [2018-07-23 23:43:00,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:43:00,048 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 129 transitions. [2018-07-23 23:43:00,048 INFO L472 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-07-23 23:43:00,048 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 129 transitions. [2018-07-23 23:43:00,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-07-23 23:43:00,048 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:43:00,048 INFO L353 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:43:00,048 INFO L414 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:43:00,049 INFO L82 PathProgramCache]: Analyzing trace with hash -613308169, now seen corresponding path program 55 times [2018-07-23 23:43:00,049 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:43:00,049 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:43:00,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:43:00,049 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:43:00,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:43:00,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:43:00,394 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 253 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:43:00,395 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:43:00,395 INFO L221 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 [2018-07-23 23:43:00,403 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:43:00,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:43:00,437 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:43:00,879 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 253 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:43:00,899 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:43:00,899 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 44 [2018-07-23 23:43:00,899 INFO L450 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-07-23 23:43:00,900 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-07-23 23:43:00,900 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=1497, Unknown=0, NotChecked=0, Total=1892 [2018-07-23 23:43:00,900 INFO L87 Difference]: Start difference. First operand 116 states and 129 transitions. Second operand 44 states. [2018-07-23 23:43:05,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:43:05,600 INFO L93 Difference]: Finished difference Result 871 states and 896 transitions. [2018-07-23 23:43:05,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-07-23 23:43:05,600 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 80 [2018-07-23 23:43:05,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:43:05,603 INFO L225 Difference]: With dead ends: 871 [2018-07-23 23:43:05,603 INFO L226 Difference]: Without dead ends: 818 [2018-07-23 23:43:05,603 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2458 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1485, Invalid=6525, Unknown=0, NotChecked=0, Total=8010 [2018-07-23 23:43:05,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2018-07-23 23:43:05,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 116. [2018-07-23 23:43:05,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-07-23 23:43:05,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 129 transitions. [2018-07-23 23:43:05,963 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 129 transitions. Word has length 80 [2018-07-23 23:43:05,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:43:05,964 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 129 transitions. [2018-07-23 23:43:05,964 INFO L472 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-07-23 23:43:05,964 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 129 transitions. [2018-07-23 23:43:05,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-07-23 23:43:05,964 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:43:05,964 INFO L353 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:43:05,964 INFO L414 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:43:05,964 INFO L82 PathProgramCache]: Analyzing trace with hash -632919421, now seen corresponding path program 11 times [2018-07-23 23:43:05,965 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:43:05,965 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:43:05,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:43:05,965 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:43:05,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:43:05,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:43:06,461 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 253 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:43:06,461 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:43:06,461 INFO L221 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 [2018-07-23 23:43:06,468 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:43:06,504 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-07-23 23:43:06,504 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:43:06,506 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:43:06,891 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 253 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:43:06,911 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:43:06,911 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 43 [2018-07-23 23:43:06,911 INFO L450 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-07-23 23:43:06,912 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-07-23 23:43:06,912 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=1407, Unknown=0, NotChecked=0, Total=1806 [2018-07-23 23:43:06,912 INFO L87 Difference]: Start difference. First operand 116 states and 129 transitions. Second operand 43 states. [2018-07-23 23:43:11,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:43:11,551 INFO L93 Difference]: Finished difference Result 928 states and 955 transitions. [2018-07-23 23:43:11,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-07-23 23:43:11,552 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 80 [2018-07-23 23:43:11,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:43:11,555 INFO L225 Difference]: With dead ends: 928 [2018-07-23 23:43:11,555 INFO L226 Difference]: Without dead ends: 875 [2018-07-23 23:43:11,556 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1757 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1225, Invalid=5095, Unknown=0, NotChecked=0, Total=6320 [2018-07-23 23:43:11,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2018-07-23 23:43:11,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 119. [2018-07-23 23:43:11,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-07-23 23:43:11,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 133 transitions. [2018-07-23 23:43:11,950 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 133 transitions. Word has length 80 [2018-07-23 23:43:11,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:43:11,950 INFO L471 AbstractCegarLoop]: Abstraction has 119 states and 133 transitions. [2018-07-23 23:43:11,951 INFO L472 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-07-23 23:43:11,951 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 133 transitions. [2018-07-23 23:43:11,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-07-23 23:43:11,951 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:43:11,951 INFO L353 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:43:11,951 INFO L414 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:43:11,951 INFO L82 PathProgramCache]: Analyzing trace with hash -5497607, now seen corresponding path program 22 times [2018-07-23 23:43:11,952 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:43:11,952 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:43:11,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:43:11,952 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:43:11,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:43:11,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:43:12,110 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 156 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:43:12,111 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:43:12,111 INFO L221 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 [2018-07-23 23:43:12,119 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:43:12,151 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:43:12,151 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:43:12,153 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:43:12,177 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 156 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:43:12,198 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:43:12,198 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2018-07-23 23:43:12,198 INFO L450 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-07-23 23:43:12,198 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-07-23 23:43:12,198 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-07-23 23:43:12,198 INFO L87 Difference]: Start difference. First operand 119 states and 133 transitions. Second operand 18 states. [2018-07-23 23:43:13,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:43:13,077 INFO L93 Difference]: Finished difference Result 132 states and 146 transitions. [2018-07-23 23:43:13,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-07-23 23:43:13,078 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 82 [2018-07-23 23:43:13,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:43:13,078 INFO L225 Difference]: With dead ends: 132 [2018-07-23 23:43:13,078 INFO L226 Difference]: Without dead ends: 130 [2018-07-23 23:43:13,079 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=364, Invalid=628, Unknown=0, NotChecked=0, Total=992 [2018-07-23 23:43:13,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-07-23 23:43:13,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 123. [2018-07-23 23:43:13,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-07-23 23:43:13,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 137 transitions. [2018-07-23 23:43:13,484 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 137 transitions. Word has length 82 [2018-07-23 23:43:13,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:43:13,484 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 137 transitions. [2018-07-23 23:43:13,484 INFO L472 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-07-23 23:43:13,484 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 137 transitions. [2018-07-23 23:43:13,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-07-23 23:43:13,485 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:43:13,485 INFO L353 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:43:13,485 INFO L414 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:43:13,485 INFO L82 PathProgramCache]: Analyzing trace with hash -354122942, now seen corresponding path program 23 times [2018-07-23 23:43:13,485 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:43:13,485 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:43:13,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:43:13,486 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:43:13,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:43:13,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:43:13,850 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 300 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:43:13,851 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:43:13,851 INFO L221 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 [2018-07-23 23:43:13,858 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:43:13,897 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-07-23 23:43:13,898 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:43:13,899 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:43:14,631 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 300 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:43:14,651 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:43:14,651 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 58 [2018-07-23 23:43:14,651 INFO L450 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-07-23 23:43:14,652 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-07-23 23:43:14,652 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=661, Invalid=2645, Unknown=0, NotChecked=0, Total=3306 [2018-07-23 23:43:14,652 INFO L87 Difference]: Start difference. First operand 123 states and 137 transitions. Second operand 58 states. [2018-07-23 23:43:16,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:43:16,699 INFO L93 Difference]: Finished difference Result 260 states and 276 transitions. [2018-07-23 23:43:16,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-07-23 23:43:16,699 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 86 [2018-07-23 23:43:16,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:43:16,700 INFO L225 Difference]: With dead ends: 260 [2018-07-23 23:43:16,700 INFO L226 Difference]: Without dead ends: 203 [2018-07-23 23:43:16,701 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2270 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1403, Invalid=5907, Unknown=0, NotChecked=0, Total=7310 [2018-07-23 23:43:16,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-07-23 23:43:17,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 125. [2018-07-23 23:43:17,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-07-23 23:43:17,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 139 transitions. [2018-07-23 23:43:17,137 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 139 transitions. Word has length 86 [2018-07-23 23:43:17,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:43:17,137 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 139 transitions. [2018-07-23 23:43:17,137 INFO L472 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-07-23 23:43:17,137 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 139 transitions. [2018-07-23 23:43:17,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-07-23 23:43:17,137 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:43:17,137 INFO L353 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:43:17,138 INFO L414 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:43:17,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1095815730, now seen corresponding path program 56 times [2018-07-23 23:43:17,138 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:43:17,138 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:43:17,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:43:17,139 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:43:17,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:43:17,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:43:17,503 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 300 proven. 134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:43:17,503 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:43:17,503 INFO L221 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 [2018-07-23 23:43:17,510 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:43:17,546 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:43:17,546 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:43:17,548 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:43:18,183 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 300 proven. 134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:43:18,203 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:43:18,204 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 57 [2018-07-23 23:43:18,204 INFO L450 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-07-23 23:43:18,204 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-07-23 23:43:18,204 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=622, Invalid=2570, Unknown=0, NotChecked=0, Total=3192 [2018-07-23 23:43:18,205 INFO L87 Difference]: Start difference. First operand 125 states and 139 transitions. Second operand 57 states. [2018-07-23 23:43:21,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:43:21,154 INFO L93 Difference]: Finished difference Result 338 states and 355 transitions. [2018-07-23 23:43:21,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-07-23 23:43:21,154 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 86 [2018-07-23 23:43:21,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:43:21,155 INFO L225 Difference]: With dead ends: 338 [2018-07-23 23:43:21,155 INFO L226 Difference]: Without dead ends: 281 [2018-07-23 23:43:21,156 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2962 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1711, Invalid=7601, Unknown=0, NotChecked=0, Total=9312 [2018-07-23 23:43:21,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2018-07-23 23:43:21,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 125. [2018-07-23 23:43:21,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-07-23 23:43:21,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 139 transitions. [2018-07-23 23:43:21,613 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 139 transitions. Word has length 86 [2018-07-23 23:43:21,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:43:21,613 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 139 transitions. [2018-07-23 23:43:21,613 INFO L472 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-07-23 23:43:21,613 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 139 transitions. [2018-07-23 23:43:21,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-07-23 23:43:21,613 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:43:21,613 INFO L353 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 11, 10, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:43:21,614 INFO L414 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:43:21,614 INFO L82 PathProgramCache]: Analyzing trace with hash 905644890, now seen corresponding path program 57 times [2018-07-23 23:43:21,614 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:43:21,614 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:43:21,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:43:21,614 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:43:21,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:43:21,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:43:21,982 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 300 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:43:21,983 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:43:21,983 INFO L221 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 [2018-07-23 23:43:21,991 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:43:22,035 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2018-07-23 23:43:22,035 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:43:22,038 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:43:22,662 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 300 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:43:22,682 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:43:22,682 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 56 [2018-07-23 23:43:22,682 INFO L450 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-07-23 23:43:22,683 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-07-23 23:43:22,683 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=587, Invalid=2493, Unknown=0, NotChecked=0, Total=3080 [2018-07-23 23:43:22,683 INFO L87 Difference]: Start difference. First operand 125 states and 139 transitions. Second operand 56 states. [2018-07-23 23:43:26,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:43:26,468 INFO L93 Difference]: Finished difference Result 414 states and 432 transitions. [2018-07-23 23:43:26,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-07-23 23:43:26,468 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 86 [2018-07-23 23:43:26,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:43:26,469 INFO L225 Difference]: With dead ends: 414 [2018-07-23 23:43:26,469 INFO L226 Difference]: Without dead ends: 357 [2018-07-23 23:43:26,470 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3626 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2008, Invalid=9122, Unknown=0, NotChecked=0, Total=11130 [2018-07-23 23:43:26,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2018-07-23 23:43:26,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 125. [2018-07-23 23:43:26,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-07-23 23:43:26,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 139 transitions. [2018-07-23 23:43:26,957 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 139 transitions. Word has length 86 [2018-07-23 23:43:26,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:43:26,957 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 139 transitions. [2018-07-23 23:43:26,957 INFO L472 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-07-23 23:43:26,957 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 139 transitions. [2018-07-23 23:43:26,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-07-23 23:43:26,958 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:43:26,958 INFO L353 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 10, 9, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:43:26,958 INFO L414 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:43:26,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1787241498, now seen corresponding path program 58 times [2018-07-23 23:43:26,958 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:43:26,959 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:43:26,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:43:26,959 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:43:26,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:43:26,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:43:27,309 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 300 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:43:27,309 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:43:27,309 INFO L221 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 [2018-07-23 23:43:27,322 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:43:27,356 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:43:27,356 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:43:27,358 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:43:27,979 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 300 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:43:28,000 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:43:28,000 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 55 [2018-07-23 23:43:28,001 INFO L450 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-07-23 23:43:28,001 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-07-23 23:43:28,001 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=2414, Unknown=0, NotChecked=0, Total=2970 [2018-07-23 23:43:28,001 INFO L87 Difference]: Start difference. First operand 125 states and 139 transitions. Second operand 55 states. [2018-07-23 23:43:32,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:43:32,369 INFO L93 Difference]: Finished difference Result 488 states and 507 transitions. [2018-07-23 23:43:32,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-07-23 23:43:32,370 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 86 [2018-07-23 23:43:32,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:43:32,371 INFO L225 Difference]: With dead ends: 488 [2018-07-23 23:43:32,372 INFO L226 Difference]: Without dead ends: 431 [2018-07-23 23:43:32,372 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4206 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2267, Invalid=10389, Unknown=0, NotChecked=0, Total=12656 [2018-07-23 23:43:32,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2018-07-23 23:43:32,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 125. [2018-07-23 23:43:32,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-07-23 23:43:32,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 139 transitions. [2018-07-23 23:43:32,869 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 139 transitions. Word has length 86 [2018-07-23 23:43:32,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:43:32,869 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 139 transitions. [2018-07-23 23:43:32,869 INFO L472 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-07-23 23:43:32,869 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 139 transitions. [2018-07-23 23:43:32,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-07-23 23:43:32,869 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:43:32,870 INFO L353 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 9, 8, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:43:32,870 INFO L414 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:43:32,870 INFO L82 PathProgramCache]: Analyzing trace with hash 386490226, now seen corresponding path program 59 times [2018-07-23 23:43:32,870 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:43:32,870 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:43:32,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:43:32,870 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:43:32,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:43:32,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:43:33,226 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 300 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:43:33,226 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:43:33,226 INFO L221 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 [2018-07-23 23:43:33,236 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:43:33,281 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-07-23 23:43:33,282 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:43:33,285 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:43:33,854 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 300 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:43:33,873 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:43:33,874 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 54 [2018-07-23 23:43:33,874 INFO L450 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-07-23 23:43:33,874 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-07-23 23:43:33,875 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=529, Invalid=2333, Unknown=0, NotChecked=0, Total=2862 [2018-07-23 23:43:33,875 INFO L87 Difference]: Start difference. First operand 125 states and 139 transitions. Second operand 54 states. [2018-07-23 23:43:38,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:43:38,848 INFO L93 Difference]: Finished difference Result 560 states and 580 transitions. [2018-07-23 23:43:38,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-07-23 23:43:38,848 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 86 [2018-07-23 23:43:38,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:43:38,850 INFO L225 Difference]: With dead ends: 560 [2018-07-23 23:43:38,850 INFO L226 Difference]: Without dead ends: 503 [2018-07-23 23:43:38,851 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4658 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2467, Invalid=11339, Unknown=0, NotChecked=0, Total=13806 [2018-07-23 23:43:38,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2018-07-23 23:43:39,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 125. [2018-07-23 23:43:39,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-07-23 23:43:39,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 139 transitions. [2018-07-23 23:43:39,321 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 139 transitions. Word has length 86 [2018-07-23 23:43:39,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:43:39,321 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 139 transitions. [2018-07-23 23:43:39,321 INFO L472 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-07-23 23:43:39,321 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 139 transitions. [2018-07-23 23:43:39,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-07-23 23:43:39,321 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:43:39,321 INFO L353 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 8, 7, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:43:39,322 INFO L414 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:43:39,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1975342590, now seen corresponding path program 60 times [2018-07-23 23:43:39,322 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:43:39,322 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:43:39,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:43:39,323 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:43:39,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:43:39,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:43:39,670 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 300 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:43:39,670 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:43:39,670 INFO L221 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 [2018-07-23 23:43:39,678 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:43:39,726 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-07-23 23:43:39,727 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:43:39,729 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:43:40,358 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 300 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:43:40,378 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:43:40,379 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 53 [2018-07-23 23:43:40,379 INFO L450 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-07-23 23:43:40,379 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-07-23 23:43:40,380 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=506, Invalid=2250, Unknown=0, NotChecked=0, Total=2756 [2018-07-23 23:43:40,380 INFO L87 Difference]: Start difference. First operand 125 states and 139 transitions. Second operand 53 states. Received shutdown request... [2018-07-23 23:43:42,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-07-23 23:43:42,485 WARN L540 AbstractCegarLoop]: Verification canceled [2018-07-23 23:43:42,490 WARN L202 ceAbstractionStarter]: Timeout [2018-07-23 23:43:42,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.07 11:43:42 BoogieIcfgContainer [2018-07-23 23:43:42,490 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-23 23:43:42,491 INFO L168 Benchmark]: Toolchain (without parser) took 250161.66 ms. Allocated memory was 1.5 GB in the beginning and 2.1 GB in the end (delta: 572.5 MB). Free memory was 1.4 GB in the beginning and 1.7 GB in the end (delta: -275.9 MB). Peak memory consumption was 296.7 MB. Max. memory is 7.1 GB. [2018-07-23 23:43:42,491 INFO L168 Benchmark]: CDTParser took 0.22 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. [2018-07-23 23:43:42,491 INFO L168 Benchmark]: CACSL2BoogieTranslator took 275.29 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-07-23 23:43:42,492 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-23 23:43:42,492 INFO L168 Benchmark]: Boogie Preprocessor took 23.67 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-23 23:43:42,492 INFO L168 Benchmark]: RCFGBuilder took 414.95 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 753.4 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -804.0 MB). Peak memory consumption was 27.2 MB. Max. memory is 7.1 GB. [2018-07-23 23:43:42,492 INFO L168 Benchmark]: TraceAbstraction took 249407.40 ms. Allocated memory was 2.3 GB in the beginning and 2.1 GB in the end (delta: -180.9 MB). Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 517.6 MB). Peak memory consumption was 336.7 MB. Max. memory is 7.1 GB. [2018-07-23 23:43:42,494 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 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. * CACSL2BoogieTranslator took 275.29 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 35.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 23.67 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 414.95 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 753.4 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -804.0 MB). Peak memory consumption was 27.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 249407.40 ms. Allocated memory was 2.3 GB in the beginning and 2.1 GB in the end (delta: -180.9 MB). Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 517.6 MB). Peak memory consumption was 336.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 5]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 5). Cancelled while BasicCegarLoop was constructing difference of abstraction (125states) and interpolant automaton (currently 46 states, 53 states before enhancement), while ReachableStatesComputation was computing reachable states (89 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 19 locations, 1 error locations. TIMEOUT Result, 249.3s OverallTime, 97 OverallIterations, 13 TraceHistogramMax, 159.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3181 SDtfs, 15282 SDslu, 34081 SDs, 0 SdLazy, 28352 SolverSat, 4865 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 33.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10432 GetRequests, 4528 SyntacticMatches, 0 SemanticMatches, 5904 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141056 ImplicationChecksByTransitivity, 116.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=125occurred in iteration=92, 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: 13.9s AutomataMinimizationTime, 96 MinimizatonAttempts, 20031 StatesRemovedByMinimization, 95 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 2.9s SatisfiabilityAnalysisTime, 68.6s InterpolantComputationTime, 11238 NumberOfCodeBlocks, 11238 NumberOfCodeBlocksAsserted, 589 NumberOfCheckSat, 11047 ConstructedInterpolants, 0 QuantifiedInterpolants, 4397496 SizeOfPredicates, 448 NumberOfNonLiveVariables, 15144 ConjunctsInSsa, 2006 ConjunctsInUnsatCore, 191 InterpolantComputations, 3 PerfectInterpolantSequences, 25646/37182 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/seq_true-unreach-call_true-termination.i_svcomp-Reach-64bit-Automizer_Default.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-07-23_23-43-42-503.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/seq_true-unreach-call_true-termination.i_svcomp-Reach-64bit-Automizer_Default.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-23_23-43-42-503.csv Completed graceful shutdown