java -Xss4m -Xmx6000000000 -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 ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/diamond_false-unreach-call1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-71425fa [2018-07-21 22:04:38,223 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-21 22:04:38,225 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-21 22:04:38,241 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-21 22:04:38,241 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-21 22:04:38,242 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-21 22:04:38,243 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-21 22:04:38,247 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-21 22:04:38,249 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-21 22:04:38,250 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-21 22:04:38,250 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-21 22:04:38,250 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-21 22:04:38,251 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-21 22:04:38,252 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-21 22:04:38,253 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-21 22:04:38,253 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-21 22:04:38,254 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-21 22:04:38,256 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-21 22:04:38,257 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-21 22:04:38,263 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-21 22:04:38,264 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-21 22:04:38,268 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-21 22:04:38,270 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-21 22:04:38,270 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-21 22:04:38,270 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-21 22:04:38,277 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-21 22:04:38,278 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-21 22:04:38,279 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-21 22:04:38,279 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-21 22:04:38,280 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-21 22:04:38,280 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-21 22:04:38,281 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-07-21 22:04:38,281 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-07-21 22:04:38,281 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-07-21 22:04:38,284 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-07-21 22:04:38,285 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-07-21 22:04:38,285 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-07-21 22:04:38,308 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-21 22:04:38,309 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-21 22:04:38,309 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-21 22:04:38,310 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-07-21 22:04:38,310 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-07-21 22:04:38,310 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-07-21 22:04:38,310 INFO L133 SettingsManager]: * Use SBE=true [2018-07-21 22:04:38,311 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-21 22:04:38,311 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-21 22:04:38,311 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-21 22:04:38,311 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-21 22:04:38,311 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-21 22:04:38,312 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-21 22:04:38,316 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-21 22:04:38,317 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-21 22:04:38,317 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-21 22:04:38,317 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-21 22:04:38,317 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-21 22:04:38,317 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-21 22:04:38,318 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-21 22:04:38,318 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-21 22:04:38,318 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-07-21 22:04:38,318 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-21 22:04:38,318 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-21 22:04:38,319 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-07-21 22:04:38,319 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-21 22:04:38,319 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-21 22:04:38,319 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-21 22:04:38,319 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-21 22:04:38,372 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-21 22:04:38,386 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-21 22:04:38,392 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-21 22:04:38,393 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-21 22:04:38,394 INFO L276 PluginConnector]: CDTParser initialized [2018-07-21 22:04:38,394 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/diamond_false-unreach-call1.i [2018-07-21 22:04:38,794 INFO L220 CDTParser]: Created temporary CDT project at /storage/ultimate/releaseScripts/default/UAutomizer-linux/data/9c8067060/198869793afb4288a85ff441d67381b2/FLAG55a8541ef [2018-07-21 22:04:38,946 INFO L276 CDTParser]: Found 1 translation units. [2018-07-21 22:04:38,946 INFO L158 CDTParser]: Scanning /storage/ultimate/trunk/examples/svcomp/loop-acceleration/diamond_false-unreach-call1.i [2018-07-21 22:04:38,953 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/ultimate/releaseScripts/default/UAutomizer-linux/data/9c8067060/198869793afb4288a85ff441d67381b2/FLAG55a8541ef [2018-07-21 22:04:38,966 INFO L332 CDTParser]: Successfully deleted /storage/ultimate/releaseScripts/default/UAutomizer-linux/data/9c8067060/198869793afb4288a85ff441d67381b2 [2018-07-21 22:04:38,979 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-21 22:04:38,985 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-21 22:04:38,986 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-21 22:04:38,986 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-21 22:04:38,993 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-21 22:04:38,994 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:04:38" (1/1) ... [2018-07-21 22:04:38,996 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51426538 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:04:38, skipping insertion in model container [2018-07-21 22:04:38,996 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:04:38" (1/1) ... [2018-07-21 22:04:39,140 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-21 22:04:39,178 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-21 22:04:39,194 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-21 22:04:39,200 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-21 22:04:39,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:04:39 WrapperNode [2018-07-21 22:04:39,216 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-21 22:04:39,217 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-21 22:04:39,224 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-21 22:04:39,224 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-21 22:04:39,234 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:04:39" (1/1) ... [2018-07-21 22:04:39,240 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:04:39" (1/1) ... [2018-07-21 22:04:39,262 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-21 22:04:39,262 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-21 22:04:39,262 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-21 22:04:39,262 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-21 22:04:39,273 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:04:39" (1/1) ... [2018-07-21 22:04:39,273 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:04:39" (1/1) ... [2018-07-21 22:04:39,274 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:04:39" (1/1) ... [2018-07-21 22:04:39,274 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:04:39" (1/1) ... [2018-07-21 22:04:39,275 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:04:39" (1/1) ... [2018-07-21 22:04:39,287 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:04:39" (1/1) ... [2018-07-21 22:04:39,289 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:04:39" (1/1) ... [2018-07-21 22:04:39,290 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-21 22:04:39,290 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-21 22:04:39,291 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-21 22:04:39,298 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-21 22:04:39,299 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:04:39" (1/1) ... No working directory specified, using /storage/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 [2018-07-21 22:04:39,366 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-21 22:04:39,366 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-21 22:04:39,764 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-21 22:04:39,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:04:39 BoogieIcfgContainer [2018-07-21 22:04:39,765 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-21 22:04:39,766 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-21 22:04:39,766 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-21 22:04:39,770 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-21 22:04:39,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:04:38" (1/3) ... [2018-07-21 22:04:39,771 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37504e61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:04:39, skipping insertion in model container [2018-07-21 22:04:39,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:04:39" (2/3) ... [2018-07-21 22:04:39,771 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37504e61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:04:39, skipping insertion in model container [2018-07-21 22:04:39,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:04:39" (3/3) ... [2018-07-21 22:04:39,774 INFO L112 eAbstractionObserver]: Analyzing ICFG diamond_false-unreach-call1.i [2018-07-21 22:04:39,796 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-21 22:04:39,806 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-21 22:04:39,849 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-21 22:04:39,852 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-21 22:04:39,852 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-21 22:04:39,852 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-21 22:04:39,852 INFO L376 AbstractCegarLoop]: Backedges is TWOTRACK [2018-07-21 22:04:39,852 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-21 22:04:39,853 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-21 22:04:39,853 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-21 22:04:39,853 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-21 22:04:39,868 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2018-07-21 22:04:39,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-07-21 22:04:39,876 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:04:39,876 INFO L358 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-07-21 22:04:39,877 INFO L414 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:04:39,880 INFO L82 PathProgramCache]: Analyzing trace with hash 889968487, now seen corresponding path program 1 times [2018-07-21 22:04:39,882 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:04:39,883 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:04:39,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:04:39,927 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:04:39,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:04:39,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:04:39,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:04:39,976 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-21 22:04:39,977 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-07-21 22:04:39,979 INFO L450 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-07-21 22:04:39,995 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-07-21 22:04:39,996 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-07-21 22:04:39,998 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2018-07-21 22:04:40,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:04:40,020 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2018-07-21 22:04:40,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-07-21 22:04:40,022 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2018-07-21 22:04:40,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:04:40,031 INFO L225 Difference]: With dead ends: 21 [2018-07-21 22:04:40,031 INFO L226 Difference]: Without dead ends: 9 [2018-07-21 22:04:40,034 INFO L578 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 [2018-07-21 22:04:40,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-07-21 22:04:40,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-07-21 22:04:40,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-07-21 22:04:40,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-07-21 22:04:40,079 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2018-07-21 22:04:40,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:04:40,079 INFO L471 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-07-21 22:04:40,080 INFO L472 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-07-21 22:04:40,080 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-07-21 22:04:40,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-07-21 22:04:40,080 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:04:40,080 INFO L358 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-07-21 22:04:40,081 INFO L414 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:04:40,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1805929617, now seen corresponding path program 1 times [2018-07-21 22:04:40,081 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:04:40,081 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:04:40,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:04:40,087 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:04:40,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:04:40,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:04:40,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:04:40,230 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-21 22:04:40,230 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-21 22:04:40,232 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-21 22:04:40,232 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-21 22:04:40,232 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-21 22:04:40,233 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 3 states. [2018-07-21 22:04:40,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:04:40,321 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2018-07-21 22:04:40,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-21 22:04:40,322 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-07-21 22:04:40,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:04:40,324 INFO L225 Difference]: With dead ends: 16 [2018-07-21 22:04:40,324 INFO L226 Difference]: Without dead ends: 12 [2018-07-21 22:04:40,325 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-21 22:04:40,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-07-21 22:04:40,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2018-07-21 22:04:40,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-07-21 22:04:40,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-07-21 22:04:40,329 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 7 [2018-07-21 22:04:40,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:04:40,342 INFO L471 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-07-21 22:04:40,342 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-21 22:04:40,342 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-07-21 22:04:40,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-07-21 22:04:40,343 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:04:40,343 INFO L358 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-21 22:04:40,343 INFO L414 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:04:40,343 INFO L82 PathProgramCache]: Analyzing trace with hash -992266740, now seen corresponding path program 1 times [2018-07-21 22:04:40,344 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:04:40,344 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:04:40,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:04:40,345 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:04:40,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:04:40,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:04:40,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:04:40,463 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:04:40,464 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:04:40,472 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:04:40,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:04:40,495 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:04:40,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:04:40,554 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:04:40,554 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-07-21 22:04:40,554 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-21 22:04:40,554 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-21 22:04:40,555 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-07-21 22:04:40,555 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 4 states. [2018-07-21 22:04:40,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:04:40,621 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2018-07-21 22:04:40,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-21 22:04:40,622 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2018-07-21 22:04:40,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:04:40,623 INFO L225 Difference]: With dead ends: 19 [2018-07-21 22:04:40,623 INFO L226 Difference]: Without dead ends: 15 [2018-07-21 22:04:40,624 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-07-21 22:04:40,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-07-21 22:04:40,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2018-07-21 22:04:40,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-07-21 22:04:40,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-07-21 22:04:40,627 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 10 [2018-07-21 22:04:40,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:04:40,628 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-07-21 22:04:40,628 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-21 22:04:40,628 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-07-21 22:04:40,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-07-21 22:04:40,629 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:04:40,629 INFO L358 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-21 22:04:40,629 INFO L414 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:04:40,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1049525042, now seen corresponding path program 1 times [2018-07-21 22:04:40,629 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:04:40,630 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:04:40,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:04:40,631 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:04:40,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:04:40,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:04:40,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:04:40,772 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:04:40,772 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:04:40,782 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:04:40,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:04:40,810 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:04:40,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:04:40,850 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:04:40,850 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-07-21 22:04:40,851 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-21 22:04:40,851 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-21 22:04:40,851 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-07-21 22:04:40,851 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 4 states. [2018-07-21 22:04:40,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:04:40,956 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2018-07-21 22:04:40,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-21 22:04:40,956 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2018-07-21 22:04:40,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:04:40,957 INFO L225 Difference]: With dead ends: 21 [2018-07-21 22:04:40,957 INFO L226 Difference]: Without dead ends: 17 [2018-07-21 22:04:40,958 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-07-21 22:04:40,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-07-21 22:04:40,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2018-07-21 22:04:40,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-07-21 22:04:40,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-07-21 22:04:40,961 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 10 [2018-07-21 22:04:40,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:04:40,961 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-07-21 22:04:40,961 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-21 22:04:40,962 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-07-21 22:04:40,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-07-21 22:04:40,962 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:04:40,962 INFO L358 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2018-07-21 22:04:40,962 INFO L414 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:04:40,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1039690063, now seen corresponding path program 2 times [2018-07-21 22:04:40,963 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:04:40,963 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:04:40,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:04:40,964 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:04:40,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:04:40,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:04:41,234 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:04:41,235 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:04:41,235 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:04:41,244 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-21 22:04:41,252 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-21 22:04:41,252 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:04:41,253 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:04:41,271 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:04:41,302 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:04:41,303 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-07-21 22:04:41,303 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-21 22:04:41,303 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-21 22:04:41,303 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-07-21 22:04:41,304 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 5 states. [2018-07-21 22:04:41,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:04:41,370 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2018-07-21 22:04:41,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-07-21 22:04:41,371 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-07-21 22:04:41,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:04:41,371 INFO L225 Difference]: With dead ends: 24 [2018-07-21 22:04:41,372 INFO L226 Difference]: Without dead ends: 20 [2018-07-21 22:04:41,372 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-07-21 22:04:41,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-07-21 22:04:41,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2018-07-21 22:04:41,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-07-21 22:04:41,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2018-07-21 22:04:41,377 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 13 [2018-07-21 22:04:41,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:04:41,377 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2018-07-21 22:04:41,377 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-21 22:04:41,377 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2018-07-21 22:04:41,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-07-21 22:04:41,378 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:04:41,378 INFO L358 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-21 22:04:41,378 INFO L414 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:04:41,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1096948365, now seen corresponding path program 1 times [2018-07-21 22:04:41,378 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:04:41,379 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:04:41,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:04:41,380 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:04:41,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:04:41,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:04:41,488 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:04:41,488 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-21 22:04:41,489 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-21 22:04:41,489 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-21 22:04:41,489 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-21 22:04:41,490 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-21 22:04:41,490 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 3 states. [2018-07-21 22:04:41,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:04:41,550 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2018-07-21 22:04:41,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-21 22:04:41,551 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2018-07-21 22:04:41,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:04:41,552 INFO L225 Difference]: With dead ends: 33 [2018-07-21 22:04:41,552 INFO L226 Difference]: Without dead ends: 26 [2018-07-21 22:04:41,553 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-21 22:04:41,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-07-21 22:04:41,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 22. [2018-07-21 22:04:41,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-07-21 22:04:41,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2018-07-21 22:04:41,558 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 13 [2018-07-21 22:04:41,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:04:41,559 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2018-07-21 22:04:41,559 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-21 22:04:41,559 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2018-07-21 22:04:41,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-07-21 22:04:41,559 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:04:41,560 INFO L358 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-21 22:04:41,560 INFO L414 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:04:41,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1719748433, now seen corresponding path program 2 times [2018-07-21 22:04:41,560 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:04:41,560 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:04:41,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:04:41,561 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:04:41,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:04:41,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:04:41,820 WARN L169 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 12 [2018-07-21 22:04:41,822 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:04:41,822 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-21 22:04:41,822 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-21 22:04:41,822 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-21 22:04:41,822 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-21 22:04:41,823 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-21 22:04:41,823 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 3 states. [2018-07-21 22:04:41,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:04:41,896 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2018-07-21 22:04:41,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-21 22:04:41,899 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2018-07-21 22:04:41,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:04:41,899 INFO L225 Difference]: With dead ends: 33 [2018-07-21 22:04:41,900 INFO L226 Difference]: Without dead ends: 26 [2018-07-21 22:04:41,900 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-21 22:04:41,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-07-21 22:04:41,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 22. [2018-07-21 22:04:41,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-07-21 22:04:41,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2018-07-21 22:04:41,908 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 13 [2018-07-21 22:04:41,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:04:41,908 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2018-07-21 22:04:41,908 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-21 22:04:41,908 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2018-07-21 22:04:41,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-07-21 22:04:41,910 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:04:41,910 INFO L358 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2018-07-21 22:04:41,911 INFO L414 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:04:41,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1777006735, now seen corresponding path program 2 times [2018-07-21 22:04:41,911 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:04:41,911 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:04:41,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:04:41,912 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:04:41,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:04:41,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:04:42,031 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:04:42,031 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:04:42,031 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:04:42,039 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-21 22:04:42,047 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-21 22:04:42,047 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:04:42,048 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:04:42,060 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:04:42,089 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:04:42,089 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-07-21 22:04:42,089 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-21 22:04:42,089 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-21 22:04:42,090 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-07-21 22:04:42,090 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 5 states. [2018-07-21 22:04:42,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:04:42,161 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2018-07-21 22:04:42,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-07-21 22:04:42,162 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-07-21 22:04:42,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:04:42,162 INFO L225 Difference]: With dead ends: 30 [2018-07-21 22:04:42,162 INFO L226 Difference]: Without dead ends: 26 [2018-07-21 22:04:42,163 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-07-21 22:04:42,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-07-21 22:04:42,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2018-07-21 22:04:42,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-07-21 22:04:42,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2018-07-21 22:04:42,168 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 13 [2018-07-21 22:04:42,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:04:42,169 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2018-07-21 22:04:42,169 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-21 22:04:42,169 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2018-07-21 22:04:42,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-07-21 22:04:42,170 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:04:42,170 INFO L358 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2018-07-21 22:04:42,170 INFO L414 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:04:42,170 INFO L82 PathProgramCache]: Analyzing trace with hash -783665172, now seen corresponding path program 3 times [2018-07-21 22:04:42,170 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:04:42,170 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:04:42,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:04:42,171 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:04:42,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:04:42,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:04:42,497 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:04:42,497 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:04:42,497 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:04:42,504 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-21 22:04:42,542 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-07-21 22:04:42,542 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:04:42,544 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:04:42,571 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:04:42,596 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:04:42,596 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-07-21 22:04:42,596 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-21 22:04:42,597 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-21 22:04:42,597 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-07-21 22:04:42,597 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 6 states. [2018-07-21 22:04:42,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:04:42,912 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2018-07-21 22:04:42,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-21 22:04:42,914 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2018-07-21 22:04:42,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:04:42,914 INFO L225 Difference]: With dead ends: 33 [2018-07-21 22:04:42,915 INFO L226 Difference]: Without dead ends: 29 [2018-07-21 22:04:42,915 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-07-21 22:04:42,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-07-21 22:04:42,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2018-07-21 22:04:42,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-07-21 22:04:42,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2018-07-21 22:04:42,922 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 16 [2018-07-21 22:04:42,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:04:42,927 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2018-07-21 22:04:42,927 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-21 22:04:42,927 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2018-07-21 22:04:42,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-07-21 22:04:42,928 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:04:42,928 INFO L358 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2018-07-21 22:04:42,928 INFO L414 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:04:42,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1779147282, now seen corresponding path program 3 times [2018-07-21 22:04:42,929 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:04:42,929 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:04:42,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:04:42,945 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:04:42,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:04:42,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:04:43,122 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:04:43,122 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:04:43,122 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:04:43,129 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-21 22:04:43,138 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-07-21 22:04:43,138 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:04:43,139 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:04:43,158 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:04:43,178 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:04:43,178 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-07-21 22:04:43,178 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-21 22:04:43,179 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-21 22:04:43,179 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-07-21 22:04:43,179 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 6 states. [2018-07-21 22:04:43,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:04:43,284 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2018-07-21 22:04:43,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-21 22:04:43,286 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2018-07-21 22:04:43,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:04:43,287 INFO L225 Difference]: With dead ends: 36 [2018-07-21 22:04:43,287 INFO L226 Difference]: Without dead ends: 32 [2018-07-21 22:04:43,287 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-07-21 22:04:43,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-07-21 22:04:43,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2018-07-21 22:04:43,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-07-21 22:04:43,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2018-07-21 22:04:43,293 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 16 [2018-07-21 22:04:43,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:04:43,294 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2018-07-21 22:04:43,294 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-21 22:04:43,294 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2018-07-21 22:04:43,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-07-21 22:04:43,294 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:04:43,294 INFO L358 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2018-07-21 22:04:43,295 INFO L414 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:04:43,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1408055087, now seen corresponding path program 4 times [2018-07-21 22:04:43,295 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:04:43,295 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:04:43,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:04:43,296 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:04:43,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:04:43,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:04:43,652 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:04:43,652 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:04:43,652 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:04:43,660 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-21 22:04:43,669 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-21 22:04:43,670 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:04:43,671 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:04:43,692 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:04:43,713 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:04:43,713 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-07-21 22:04:43,713 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-21 22:04:43,713 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-21 22:04:43,714 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-07-21 22:04:43,714 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 7 states. [2018-07-21 22:04:43,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:04:43,851 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2018-07-21 22:04:43,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-21 22:04:43,851 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2018-07-21 22:04:43,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:04:43,852 INFO L225 Difference]: With dead ends: 39 [2018-07-21 22:04:43,852 INFO L226 Difference]: Without dead ends: 35 [2018-07-21 22:04:43,852 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-07-21 22:04:43,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-07-21 22:04:43,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2018-07-21 22:04:43,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-07-21 22:04:43,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2018-07-21 22:04:43,858 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 19 [2018-07-21 22:04:43,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:04:43,859 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2018-07-21 22:04:43,859 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-21 22:04:43,859 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2018-07-21 22:04:43,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-07-21 22:04:43,859 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:04:43,860 INFO L358 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2018-07-21 22:04:43,860 INFO L414 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:04:43,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1123673519, now seen corresponding path program 4 times [2018-07-21 22:04:43,860 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:04:43,860 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:04:43,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:04:43,861 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:04:43,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:04:43,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:04:43,973 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:04:43,973 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:04:43,973 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:04:43,979 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-21 22:04:43,989 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-21 22:04:43,990 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:04:43,992 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:04:44,008 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:04:44,029 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:04:44,029 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-07-21 22:04:44,029 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-21 22:04:44,030 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-21 22:04:44,030 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-07-21 22:04:44,030 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 7 states. [2018-07-21 22:04:44,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:04:44,116 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2018-07-21 22:04:44,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-21 22:04:44,117 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2018-07-21 22:04:44,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:04:44,117 INFO L225 Difference]: With dead ends: 42 [2018-07-21 22:04:44,117 INFO L226 Difference]: Without dead ends: 38 [2018-07-21 22:04:44,118 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-07-21 22:04:44,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-07-21 22:04:44,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2018-07-21 22:04:44,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-07-21 22:04:44,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2018-07-21 22:04:44,124 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 19 [2018-07-21 22:04:44,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:04:44,124 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2018-07-21 22:04:44,124 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-21 22:04:44,124 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2018-07-21 22:04:44,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-07-21 22:04:44,125 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:04:44,125 INFO L358 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1] [2018-07-21 22:04:44,125 INFO L414 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:04:44,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1104653876, now seen corresponding path program 5 times [2018-07-21 22:04:44,126 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:04:44,126 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:04:44,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:04:44,127 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:04:44,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:04:44,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:04:44,699 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:04:44,699 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:04:44,699 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:04:44,707 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-21 22:04:44,724 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-07-21 22:04:44,725 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:04:44,726 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:04:44,746 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:04:44,778 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:04:44,779 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-07-21 22:04:44,779 INFO L450 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-07-21 22:04:44,779 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-07-21 22:04:44,780 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-07-21 22:04:44,780 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 8 states. [2018-07-21 22:04:44,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:04:44,899 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2018-07-21 22:04:44,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-21 22:04:44,900 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2018-07-21 22:04:44,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:04:44,901 INFO L225 Difference]: With dead ends: 45 [2018-07-21 22:04:44,901 INFO L226 Difference]: Without dead ends: 41 [2018-07-21 22:04:44,901 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-07-21 22:04:44,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-07-21 22:04:44,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2018-07-21 22:04:44,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-07-21 22:04:44,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2018-07-21 22:04:44,908 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 22 [2018-07-21 22:04:44,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:04:44,909 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2018-07-21 22:04:44,909 INFO L472 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-07-21 22:04:44,909 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2018-07-21 22:04:44,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-07-21 22:04:44,909 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:04:44,910 INFO L358 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1] [2018-07-21 22:04:44,910 INFO L414 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:04:44,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1173872398, now seen corresponding path program 5 times [2018-07-21 22:04:44,910 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:04:44,910 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:04:44,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:04:44,911 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:04:44,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:04:44,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:04:45,387 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:04:45,387 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:04:45,387 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:04:45,393 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-21 22:04:45,435 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-07-21 22:04:45,435 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:04:45,436 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:04:45,453 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:04:45,473 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:04:45,473 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-07-21 22:04:45,473 INFO L450 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-07-21 22:04:45,474 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-07-21 22:04:45,474 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-07-21 22:04:45,474 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 8 states. [2018-07-21 22:04:45,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:04:45,605 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2018-07-21 22:04:45,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-21 22:04:45,606 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2018-07-21 22:04:45,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:04:45,606 INFO L225 Difference]: With dead ends: 48 [2018-07-21 22:04:45,606 INFO L226 Difference]: Without dead ends: 44 [2018-07-21 22:04:45,607 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-07-21 22:04:45,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-07-21 22:04:45,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2018-07-21 22:04:45,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-07-21 22:04:45,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2018-07-21 22:04:45,613 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 22 [2018-07-21 22:04:45,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:04:45,613 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2018-07-21 22:04:45,613 INFO L472 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-07-21 22:04:45,614 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2018-07-21 22:04:45,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-07-21 22:04:45,614 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:04:45,615 INFO L358 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1] [2018-07-21 22:04:45,615 INFO L414 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:04:45,615 INFO L82 PathProgramCache]: Analyzing trace with hash 909632241, now seen corresponding path program 6 times [2018-07-21 22:04:45,615 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:04:45,615 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:04:45,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:04:45,616 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:04:45,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:04:45,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:04:45,856 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:04:45,856 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:04:45,856 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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) [2018-07-21 22:04:45,872 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:04:45,903 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-07-21 22:04:45,903 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:04:45,904 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:04:45,924 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:04:45,945 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:04:45,945 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-07-21 22:04:45,946 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-21 22:04:45,946 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-21 22:04:45,946 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-07-21 22:04:45,946 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 9 states. [2018-07-21 22:04:46,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:04:46,018 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2018-07-21 22:04:46,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-07-21 22:04:46,018 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2018-07-21 22:04:46,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:04:46,019 INFO L225 Difference]: With dead ends: 51 [2018-07-21 22:04:46,019 INFO L226 Difference]: Without dead ends: 47 [2018-07-21 22:04:46,019 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-07-21 22:04:46,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-07-21 22:04:46,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2018-07-21 22:04:46,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-07-21 22:04:46,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2018-07-21 22:04:46,025 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 25 [2018-07-21 22:04:46,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:04:46,026 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2018-07-21 22:04:46,026 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-21 22:04:46,026 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2018-07-21 22:04:46,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-07-21 22:04:46,027 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:04:46,027 INFO L358 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1] [2018-07-21 22:04:46,027 INFO L414 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:04:46,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1529510607, now seen corresponding path program 6 times [2018-07-21 22:04:46,027 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:04:46,028 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:04:46,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:04:46,028 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:04:46,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:04:46,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:04:46,304 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:04:46,304 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:04:46,304 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:04:46,310 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-21 22:04:46,382 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-07-21 22:04:46,382 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:04:46,383 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:04:46,389 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:04:46,408 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:04:46,409 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-07-21 22:04:46,409 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-21 22:04:46,409 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-21 22:04:46,409 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-07-21 22:04:46,409 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 9 states. [2018-07-21 22:04:46,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:04:46,532 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2018-07-21 22:04:46,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-07-21 22:04:46,532 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2018-07-21 22:04:46,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:04:46,533 INFO L225 Difference]: With dead ends: 54 [2018-07-21 22:04:46,533 INFO L226 Difference]: Without dead ends: 50 [2018-07-21 22:04:46,533 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-07-21 22:04:46,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-07-21 22:04:46,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2018-07-21 22:04:46,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-07-21 22:04:46,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2018-07-21 22:04:46,540 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 25 [2018-07-21 22:04:46,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:04:46,540 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2018-07-21 22:04:46,540 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-21 22:04:46,540 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2018-07-21 22:04:46,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-07-21 22:04:46,541 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:04:46,541 INFO L358 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1] [2018-07-21 22:04:46,541 INFO L414 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:04:46,542 INFO L82 PathProgramCache]: Analyzing trace with hash -775715924, now seen corresponding path program 7 times [2018-07-21 22:04:46,542 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:04:46,542 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:04:46,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:04:46,543 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:04:46,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:04:46,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:04:46,679 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:04:46,679 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:04:46,679 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:04:46,687 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:04:46,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:04:46,696 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:04:46,707 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:04:46,726 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:04:46,727 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-07-21 22:04:46,727 INFO L450 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-07-21 22:04:46,727 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-07-21 22:04:46,727 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-07-21 22:04:46,727 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 10 states. [2018-07-21 22:04:47,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:04:47,095 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2018-07-21 22:04:47,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-07-21 22:04:47,095 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2018-07-21 22:04:47,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:04:47,096 INFO L225 Difference]: With dead ends: 57 [2018-07-21 22:04:47,096 INFO L226 Difference]: Without dead ends: 53 [2018-07-21 22:04:47,097 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-07-21 22:04:47,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-07-21 22:04:47,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2018-07-21 22:04:47,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-07-21 22:04:47,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2018-07-21 22:04:47,103 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 28 [2018-07-21 22:04:47,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:04:47,103 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2018-07-21 22:04:47,103 INFO L472 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-07-21 22:04:47,103 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2018-07-21 22:04:47,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-07-21 22:04:47,104 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:04:47,104 INFO L358 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1] [2018-07-21 22:04:47,105 INFO L414 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:04:47,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1214122030, now seen corresponding path program 7 times [2018-07-21 22:04:47,105 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:04:47,105 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:04:47,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:04:47,106 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:04:47,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:04:47,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:04:47,505 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:04:47,505 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:04:47,505 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:04:47,511 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:04:47,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:04:47,535 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:04:47,602 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:04:47,636 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:04:47,636 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-07-21 22:04:47,636 INFO L450 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-07-21 22:04:47,637 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-07-21 22:04:47,637 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-07-21 22:04:47,637 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 10 states. [2018-07-21 22:04:47,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:04:47,861 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2018-07-21 22:04:47,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-07-21 22:04:47,861 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2018-07-21 22:04:47,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:04:47,862 INFO L225 Difference]: With dead ends: 60 [2018-07-21 22:04:47,862 INFO L226 Difference]: Without dead ends: 56 [2018-07-21 22:04:47,862 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-07-21 22:04:47,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-07-21 22:04:47,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2018-07-21 22:04:47,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-07-21 22:04:47,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2018-07-21 22:04:47,869 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 28 [2018-07-21 22:04:47,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:04:47,869 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2018-07-21 22:04:47,869 INFO L472 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-07-21 22:04:47,869 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2018-07-21 22:04:47,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-07-21 22:04:47,871 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:04:47,871 INFO L358 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1] [2018-07-21 22:04:47,871 INFO L414 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:04:47,871 INFO L82 PathProgramCache]: Analyzing trace with hash -815209199, now seen corresponding path program 8 times [2018-07-21 22:04:47,871 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:04:47,871 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:04:47,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:04:47,872 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:04:47,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:04:47,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:04:48,065 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:04:48,065 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:04:48,065 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:04:48,071 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-21 22:04:48,080 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-21 22:04:48,080 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:04:48,082 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:04:48,093 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:04:48,113 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:04:48,113 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-07-21 22:04:48,113 INFO L450 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-07-21 22:04:48,113 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-07-21 22:04:48,113 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-07-21 22:04:48,114 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 11 states. [2018-07-21 22:04:48,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:04:48,228 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2018-07-21 22:04:48,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-07-21 22:04:48,229 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2018-07-21 22:04:48,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:04:48,229 INFO L225 Difference]: With dead ends: 63 [2018-07-21 22:04:48,229 INFO L226 Difference]: Without dead ends: 59 [2018-07-21 22:04:48,230 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-07-21 22:04:48,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-07-21 22:04:48,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2018-07-21 22:04:48,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-07-21 22:04:48,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2018-07-21 22:04:48,235 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 31 [2018-07-21 22:04:48,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:04:48,236 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2018-07-21 22:04:48,236 INFO L472 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-07-21 22:04:48,236 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2018-07-21 22:04:48,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-07-21 22:04:48,237 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:04:48,237 INFO L358 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1] [2018-07-21 22:04:48,237 INFO L414 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:04:48,237 INFO L82 PathProgramCache]: Analyzing trace with hash -748599279, now seen corresponding path program 8 times [2018-07-21 22:04:48,237 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:04:48,238 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:04:48,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:04:48,238 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:04:48,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:04:48,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:04:48,399 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:04:48,400 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:04:48,400 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:04:48,409 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-21 22:04:48,418 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-21 22:04:48,419 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:04:48,420 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:04:48,443 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:04:48,463 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:04:48,463 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-07-21 22:04:48,463 INFO L450 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-07-21 22:04:48,463 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-07-21 22:04:48,463 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-07-21 22:04:48,464 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 11 states. [2018-07-21 22:04:48,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:04:48,638 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2018-07-21 22:04:48,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-07-21 22:04:48,639 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2018-07-21 22:04:48,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:04:48,639 INFO L225 Difference]: With dead ends: 66 [2018-07-21 22:04:48,639 INFO L226 Difference]: Without dead ends: 62 [2018-07-21 22:04:48,639 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-07-21 22:04:48,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-07-21 22:04:48,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2018-07-21 22:04:48,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-07-21 22:04:48,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2018-07-21 22:04:48,645 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 31 [2018-07-21 22:04:48,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:04:48,646 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2018-07-21 22:04:48,646 INFO L472 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-07-21 22:04:48,646 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2018-07-21 22:04:48,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-07-21 22:04:48,647 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:04:48,647 INFO L358 BasicCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1] [2018-07-21 22:04:48,647 INFO L414 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:04:48,647 INFO L82 PathProgramCache]: Analyzing trace with hash -538325620, now seen corresponding path program 9 times [2018-07-21 22:04:48,647 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:04:48,648 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:04:48,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:04:48,648 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:04:48,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:04:48,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:04:48,963 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:04:48,963 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:04:48,963 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:04:48,969 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-21 22:04:51,556 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-07-21 22:04:51,556 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:04:51,579 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:04:51,624 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:04:51,652 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:04:51,652 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-07-21 22:04:51,652 INFO L450 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-07-21 22:04:51,653 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-07-21 22:04:51,653 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-07-21 22:04:51,653 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 12 states. [2018-07-21 22:04:51,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:04:51,818 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2018-07-21 22:04:51,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-07-21 22:04:51,818 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2018-07-21 22:04:51,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:04:51,819 INFO L225 Difference]: With dead ends: 69 [2018-07-21 22:04:51,819 INFO L226 Difference]: Without dead ends: 65 [2018-07-21 22:04:51,819 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-07-21 22:04:51,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-07-21 22:04:51,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2018-07-21 22:04:51,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-07-21 22:04:51,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2018-07-21 22:04:51,825 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 34 [2018-07-21 22:04:51,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:04:51,825 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2018-07-21 22:04:51,826 INFO L472 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-07-21 22:04:51,826 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2018-07-21 22:04:51,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-07-21 22:04:51,827 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:04:51,827 INFO L358 BasicCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1] [2018-07-21 22:04:51,827 INFO L414 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:04:51,827 INFO L82 PathProgramCache]: Analyzing trace with hash -494347954, now seen corresponding path program 9 times [2018-07-21 22:04:51,827 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:04:51,827 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:04:51,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:04:51,829 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:04:51,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:04:51,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:04:52,107 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:04:52,107 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:04:52,107 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:04:52,113 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-21 22:04:52,658 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-07-21 22:04:52,658 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:04:52,662 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:04:52,679 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:04:52,699 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:04:52,699 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-07-21 22:04:52,699 INFO L450 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-07-21 22:04:52,699 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-07-21 22:04:52,699 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-07-21 22:04:52,700 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 12 states. [2018-07-21 22:04:52,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:04:52,950 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2018-07-21 22:04:52,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-07-21 22:04:52,952 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2018-07-21 22:04:52,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:04:52,953 INFO L225 Difference]: With dead ends: 72 [2018-07-21 22:04:52,953 INFO L226 Difference]: Without dead ends: 68 [2018-07-21 22:04:52,954 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-07-21 22:04:52,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-07-21 22:04:52,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2018-07-21 22:04:52,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-07-21 22:04:52,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2018-07-21 22:04:52,960 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 34 [2018-07-21 22:04:52,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:04:52,960 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2018-07-21 22:04:52,960 INFO L472 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-07-21 22:04:52,960 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2018-07-21 22:04:52,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-07-21 22:04:52,961 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:04:52,961 INFO L358 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1] [2018-07-21 22:04:52,961 INFO L414 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:04:52,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1763168049, now seen corresponding path program 10 times [2018-07-21 22:04:52,962 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:04:52,962 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:04:52,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:04:52,962 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:04:52,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:04:52,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:04:53,157 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:04:53,157 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:04:53,157 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:04:53,165 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-21 22:04:53,180 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-21 22:04:53,180 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:04:53,182 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:04:53,203 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:04:53,222 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:04:53,222 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-07-21 22:04:53,222 INFO L450 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-07-21 22:04:53,222 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-07-21 22:04:53,222 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-07-21 22:04:53,223 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 13 states. [2018-07-21 22:04:53,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:04:53,439 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2018-07-21 22:04:53,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-07-21 22:04:53,439 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2018-07-21 22:04:53,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:04:53,440 INFO L225 Difference]: With dead ends: 75 [2018-07-21 22:04:53,440 INFO L226 Difference]: Without dead ends: 71 [2018-07-21 22:04:53,440 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-07-21 22:04:53,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-07-21 22:04:53,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2018-07-21 22:04:53,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-07-21 22:04:53,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2018-07-21 22:04:53,446 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 37 [2018-07-21 22:04:53,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:04:53,446 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2018-07-21 22:04:53,446 INFO L472 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-07-21 22:04:53,446 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2018-07-21 22:04:53,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-07-21 22:04:53,447 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:04:53,447 INFO L358 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1] [2018-07-21 22:04:53,447 INFO L414 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:04:53,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1879532273, now seen corresponding path program 10 times [2018-07-21 22:04:53,448 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:04:53,448 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:04:53,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:04:53,449 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:04:53,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:04:53,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:04:53,883 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:04:53,884 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:04:53,884 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:04:53,890 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-21 22:04:53,900 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-21 22:04:53,900 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:04:53,901 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:04:53,924 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:04:53,952 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:04:53,953 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-07-21 22:04:53,953 INFO L450 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-07-21 22:04:53,953 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-07-21 22:04:53,953 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-07-21 22:04:53,954 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 13 states. [2018-07-21 22:04:54,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:04:54,135 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2018-07-21 22:04:54,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-07-21 22:04:54,139 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2018-07-21 22:04:54,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:04:54,140 INFO L225 Difference]: With dead ends: 78 [2018-07-21 22:04:54,140 INFO L226 Difference]: Without dead ends: 74 [2018-07-21 22:04:54,140 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-07-21 22:04:54,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-07-21 22:04:54,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2018-07-21 22:04:54,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-07-21 22:04:54,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2018-07-21 22:04:54,143 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 37 [2018-07-21 22:04:54,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:04:54,143 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2018-07-21 22:04:54,144 INFO L472 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-07-21 22:04:54,144 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2018-07-21 22:04:54,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-07-21 22:04:54,144 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:04:54,144 INFO L358 BasicCegarLoop]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1] [2018-07-21 22:04:54,144 INFO L414 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:04:54,145 INFO L82 PathProgramCache]: Analyzing trace with hash 703147884, now seen corresponding path program 11 times [2018-07-21 22:04:54,145 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:04:54,145 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:04:54,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:04:54,145 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:04:54,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:04:54,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:04:54,852 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:04:54,852 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:04:54,852 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:04:54,859 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-21 22:05:05,942 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-07-21 22:05:05,942 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:05:05,981 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:05:05,995 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:05:06,015 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:05:06,015 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-07-21 22:05:06,016 INFO L450 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-07-21 22:05:06,016 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-07-21 22:05:06,016 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-07-21 22:05:06,016 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 14 states. [2018-07-21 22:05:06,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:05:06,744 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2018-07-21 22:05:06,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-07-21 22:05:06,744 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 40 [2018-07-21 22:05:06,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:05:06,745 INFO L225 Difference]: With dead ends: 81 [2018-07-21 22:05:06,745 INFO L226 Difference]: Without dead ends: 77 [2018-07-21 22:05:06,745 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-07-21 22:05:06,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-07-21 22:05:06,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2018-07-21 22:05:06,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-07-21 22:05:06,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2018-07-21 22:05:06,750 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 40 [2018-07-21 22:05:06,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:05:06,750 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2018-07-21 22:05:06,750 INFO L472 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-07-21 22:05:06,750 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2018-07-21 22:05:06,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-07-21 22:05:06,751 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:05:06,751 INFO L358 BasicCegarLoop]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1] [2018-07-21 22:05:06,751 INFO L414 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:05:06,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1213878894, now seen corresponding path program 11 times [2018-07-21 22:05:06,752 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:05:06,752 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:05:06,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:05:06,752 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:05:06,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:05:06,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:05:06,931 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:05:06,931 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:05:06,931 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:05:06,941 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-21 22:05:08,105 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-07-21 22:05:08,106 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:05:08,118 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:05:08,143 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:05:08,162 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:05:08,162 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-07-21 22:05:08,162 INFO L450 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-07-21 22:05:08,163 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-07-21 22:05:08,163 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-07-21 22:05:08,163 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 14 states. [2018-07-21 22:05:08,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:05:08,391 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2018-07-21 22:05:08,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-07-21 22:05:08,391 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 40 [2018-07-21 22:05:08,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:05:08,392 INFO L225 Difference]: With dead ends: 84 [2018-07-21 22:05:08,392 INFO L226 Difference]: Without dead ends: 80 [2018-07-21 22:05:08,392 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-07-21 22:05:08,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-07-21 22:05:08,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2018-07-21 22:05:08,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-07-21 22:05:08,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2018-07-21 22:05:08,396 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 40 [2018-07-21 22:05:08,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:05:08,396 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2018-07-21 22:05:08,397 INFO L472 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-07-21 22:05:08,397 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2018-07-21 22:05:08,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-07-21 22:05:08,397 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:05:08,397 INFO L358 BasicCegarLoop]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1] [2018-07-21 22:05:08,398 INFO L414 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:05:08,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1758027439, now seen corresponding path program 12 times [2018-07-21 22:05:08,398 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:05:08,398 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:05:08,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:05:08,399 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:05:08,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:05:08,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:05:08,626 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:05:08,626 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:05:08,626 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:05:08,638 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-21 22:05:20,845 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-07-21 22:05:20,845 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:05:20,851 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:05:20,860 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:05:20,879 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:05:20,879 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-07-21 22:05:20,879 INFO L450 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-07-21 22:05:20,880 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-07-21 22:05:20,880 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-07-21 22:05:20,880 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand 15 states. [2018-07-21 22:05:21,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:05:21,040 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2018-07-21 22:05:21,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-07-21 22:05:21,073 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2018-07-21 22:05:21,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:05:21,074 INFO L225 Difference]: With dead ends: 87 [2018-07-21 22:05:21,074 INFO L226 Difference]: Without dead ends: 83 [2018-07-21 22:05:21,074 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-07-21 22:05:21,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-07-21 22:05:21,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2018-07-21 22:05:21,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-07-21 22:05:21,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2018-07-21 22:05:21,080 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 43 [2018-07-21 22:05:21,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:05:21,080 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2018-07-21 22:05:21,080 INFO L472 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-07-21 22:05:21,080 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2018-07-21 22:05:21,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-07-21 22:05:21,081 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:05:21,081 INFO L358 BasicCegarLoop]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1] [2018-07-21 22:05:21,081 INFO L414 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:05:21,081 INFO L82 PathProgramCache]: Analyzing trace with hash 598070737, now seen corresponding path program 12 times [2018-07-21 22:05:21,081 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:05:21,082 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:05:21,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:05:21,082 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:05:21,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:05:21,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:05:22,475 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:05:22,476 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:05:22,476 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:05:22,482 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-21 22:05:22,746 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-07-21 22:05:22,746 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:05:22,748 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:05:22,759 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:05:22,778 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:05:22,778 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-07-21 22:05:22,779 INFO L450 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-07-21 22:05:22,779 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-07-21 22:05:22,779 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-07-21 22:05:22,779 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 15 states. [2018-07-21 22:05:23,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:05:23,149 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2018-07-21 22:05:23,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-07-21 22:05:23,149 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2018-07-21 22:05:23,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:05:23,150 INFO L225 Difference]: With dead ends: 90 [2018-07-21 22:05:23,150 INFO L226 Difference]: Without dead ends: 86 [2018-07-21 22:05:23,150 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-07-21 22:05:23,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-07-21 22:05:23,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2018-07-21 22:05:23,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-07-21 22:05:23,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2018-07-21 22:05:23,157 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 43 [2018-07-21 22:05:23,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:05:23,158 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2018-07-21 22:05:23,158 INFO L472 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-07-21 22:05:23,158 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2018-07-21 22:05:23,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-07-21 22:05:23,159 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:05:23,159 INFO L358 BasicCegarLoop]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1] [2018-07-21 22:05:23,159 INFO L414 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:05:23,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1049602380, now seen corresponding path program 13 times [2018-07-21 22:05:23,159 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:05:23,159 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:05:23,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:05:23,160 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:05:23,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:05:23,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:05:23,621 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:05:23,621 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:05:23,621 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:05:23,626 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:05:23,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:05:23,637 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:05:23,652 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:05:23,671 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:05:23,671 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-07-21 22:05:23,671 INFO L450 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-07-21 22:05:23,672 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-07-21 22:05:23,672 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-07-21 22:05:23,672 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 16 states. [2018-07-21 22:05:23,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:05:23,861 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2018-07-21 22:05:23,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-07-21 22:05:23,861 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 46 [2018-07-21 22:05:23,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:05:23,862 INFO L225 Difference]: With dead ends: 93 [2018-07-21 22:05:23,862 INFO L226 Difference]: Without dead ends: 89 [2018-07-21 22:05:23,862 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-07-21 22:05:23,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-07-21 22:05:23,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2018-07-21 22:05:23,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-07-21 22:05:23,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2018-07-21 22:05:23,867 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 46 [2018-07-21 22:05:23,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:05:23,868 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2018-07-21 22:05:23,868 INFO L472 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-07-21 22:05:23,868 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2018-07-21 22:05:23,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-07-21 22:05:23,868 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:05:23,868 INFO L358 BasicCegarLoop]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1] [2018-07-21 22:05:23,868 INFO L414 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:05:23,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1137413234, now seen corresponding path program 13 times [2018-07-21 22:05:23,869 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:05:23,869 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:05:23,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:05:23,869 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:05:23,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:05:23,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:05:25,300 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:05:25,300 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:05:25,300 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:05:25,306 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:05:25,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:05:25,318 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:05:25,327 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:05:25,346 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:05:25,346 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-07-21 22:05:25,346 INFO L450 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-07-21 22:05:25,347 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-07-21 22:05:25,347 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-07-21 22:05:25,347 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 16 states. [2018-07-21 22:05:25,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:05:25,599 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2018-07-21 22:05:25,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-07-21 22:05:25,599 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 46 [2018-07-21 22:05:25,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:05:25,600 INFO L225 Difference]: With dead ends: 96 [2018-07-21 22:05:25,600 INFO L226 Difference]: Without dead ends: 92 [2018-07-21 22:05:25,600 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-07-21 22:05:25,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-07-21 22:05:25,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2018-07-21 22:05:25,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-07-21 22:05:25,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2018-07-21 22:05:25,606 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 46 [2018-07-21 22:05:25,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:05:25,606 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2018-07-21 22:05:25,607 INFO L472 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-07-21 22:05:25,607 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2018-07-21 22:05:25,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-07-21 22:05:25,607 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:05:25,607 INFO L358 BasicCegarLoop]: trace histogram [15, 14, 14, 1, 1, 1, 1, 1, 1] [2018-07-21 22:05:25,608 INFO L414 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:05:25,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1338549391, now seen corresponding path program 14 times [2018-07-21 22:05:25,608 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:05:25,608 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:05:25,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:05:25,609 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:05:25,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:05:25,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:05:26,538 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:05:26,539 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:05:26,539 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:05:26,545 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-21 22:05:26,557 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-21 22:05:26,557 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:05:26,558 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:05:26,570 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:05:26,589 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:05:26,589 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-07-21 22:05:26,589 INFO L450 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-07-21 22:05:26,589 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-07-21 22:05:26,590 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-07-21 22:05:26,590 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand 17 states. [2018-07-21 22:05:26,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:05:26,797 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2018-07-21 22:05:26,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-07-21 22:05:26,798 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 49 [2018-07-21 22:05:26,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:05:26,798 INFO L225 Difference]: With dead ends: 99 [2018-07-21 22:05:26,798 INFO L226 Difference]: Without dead ends: 95 [2018-07-21 22:05:26,799 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-07-21 22:05:26,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-07-21 22:05:26,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2018-07-21 22:05:26,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-07-21 22:05:26,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2018-07-21 22:05:26,803 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 49 [2018-07-21 22:05:26,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:05:26,803 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2018-07-21 22:05:26,803 INFO L472 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-07-21 22:05:26,803 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2018-07-21 22:05:26,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-07-21 22:05:26,804 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:05:26,804 INFO L358 BasicCegarLoop]: trace histogram [15, 14, 14, 1, 1, 1, 1, 1, 1] [2018-07-21 22:05:26,804 INFO L414 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:05:26,804 INFO L82 PathProgramCache]: Analyzing trace with hash -124084047, now seen corresponding path program 14 times [2018-07-21 22:05:26,805 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:05:26,805 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:05:26,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:05:26,805 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:05:26,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:05:26,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:05:27,056 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:05:27,057 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:05:27,057 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:05:27,062 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-21 22:05:27,074 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-21 22:05:27,074 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:05:27,076 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:05:27,108 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:05:27,138 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:05:27,138 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-07-21 22:05:27,139 INFO L450 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-07-21 22:05:27,139 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-07-21 22:05:27,139 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-07-21 22:05:27,139 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 17 states. [2018-07-21 22:05:27,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:05:27,567 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2018-07-21 22:05:27,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-07-21 22:05:27,567 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 49 [2018-07-21 22:05:27,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:05:27,567 INFO L225 Difference]: With dead ends: 102 [2018-07-21 22:05:27,568 INFO L226 Difference]: Without dead ends: 98 [2018-07-21 22:05:27,568 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-07-21 22:05:27,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-07-21 22:05:27,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2018-07-21 22:05:27,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-07-21 22:05:27,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2018-07-21 22:05:27,574 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 49 [2018-07-21 22:05:27,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:05:27,574 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2018-07-21 22:05:27,574 INFO L472 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-07-21 22:05:27,574 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2018-07-21 22:05:27,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-07-21 22:05:27,574 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:05:27,574 INFO L358 BasicCegarLoop]: trace histogram [16, 15, 15, 1, 1, 1, 1, 1, 1] [2018-07-21 22:05:27,575 INFO L414 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:05:27,575 INFO L82 PathProgramCache]: Analyzing trace with hash -634701012, now seen corresponding path program 15 times [2018-07-21 22:05:27,575 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:05:27,575 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:05:27,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:05:27,576 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:05:27,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:05:27,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:05:28,500 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:05:28,501 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:05:28,501 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:05:28,509 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-21 22:05:35,089 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-07-21 22:05:35,090 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:05:35,098 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:05:35,136 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:05:35,156 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:05:35,156 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-07-21 22:05:35,157 INFO L450 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-07-21 22:05:35,157 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-07-21 22:05:35,157 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-07-21 22:05:35,157 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand 18 states. [2018-07-21 22:05:35,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:05:35,378 INFO L93 Difference]: Finished difference Result 105 states and 107 transitions. [2018-07-21 22:05:35,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-07-21 22:05:35,379 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2018-07-21 22:05:35,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:05:35,379 INFO L225 Difference]: With dead ends: 105 [2018-07-21 22:05:35,379 INFO L226 Difference]: Without dead ends: 101 [2018-07-21 22:05:35,380 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-07-21 22:05:35,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-07-21 22:05:35,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2018-07-21 22:05:35,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-07-21 22:05:35,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2018-07-21 22:05:35,385 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 52 [2018-07-21 22:05:35,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:05:35,386 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2018-07-21 22:05:35,386 INFO L472 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-07-21 22:05:35,386 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2018-07-21 22:05:35,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-07-21 22:05:35,387 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:05:35,387 INFO L358 BasicCegarLoop]: trace histogram [16, 15, 15, 1, 1, 1, 1, 1, 1] [2018-07-21 22:05:35,387 INFO L414 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:05:35,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1359397714, now seen corresponding path program 15 times [2018-07-21 22:05:35,387 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:05:35,387 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:05:35,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:05:35,388 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:05:35,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:05:35,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:05:35,773 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:05:35,773 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:05:35,773 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:05:35,779 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-21 22:05:40,647 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-07-21 22:05:40,647 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:05:40,654 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:05:40,671 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:05:40,690 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:05:40,690 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-07-21 22:05:40,691 INFO L450 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-07-21 22:05:40,691 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-07-21 22:05:40,691 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-07-21 22:05:40,691 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand 18 states. [2018-07-21 22:05:40,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:05:40,952 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2018-07-21 22:05:40,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-07-21 22:05:40,953 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2018-07-21 22:05:40,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:05:40,953 INFO L225 Difference]: With dead ends: 108 [2018-07-21 22:05:40,954 INFO L226 Difference]: Without dead ends: 104 [2018-07-21 22:05:40,954 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-07-21 22:05:40,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-07-21 22:05:40,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2018-07-21 22:05:40,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-07-21 22:05:40,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 105 transitions. [2018-07-21 22:05:40,960 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 105 transitions. Word has length 52 [2018-07-21 22:05:40,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:05:40,960 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 105 transitions. [2018-07-21 22:05:40,960 INFO L472 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-07-21 22:05:40,960 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 105 transitions. [2018-07-21 22:05:40,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-07-21 22:05:40,961 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:05:40,961 INFO L358 BasicCegarLoop]: trace histogram [17, 16, 16, 1, 1, 1, 1, 1, 1] [2018-07-21 22:05:40,961 INFO L414 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:05:40,961 INFO L82 PathProgramCache]: Analyzing trace with hash -317981295, now seen corresponding path program 16 times [2018-07-21 22:05:40,961 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:05:40,961 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:05:40,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:05:40,962 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:05:40,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:05:40,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:05:41,221 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:05:41,221 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:05:41,221 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:05:41,227 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-21 22:05:41,238 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-21 22:05:41,238 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:05:41,240 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:05:41,259 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:05:41,278 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:05:41,278 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-07-21 22:05:41,278 INFO L450 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-07-21 22:05:41,279 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-07-21 22:05:41,279 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-07-21 22:05:41,279 INFO L87 Difference]: Start difference. First operand 103 states and 105 transitions. Second operand 19 states. [2018-07-21 22:05:41,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:05:41,525 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2018-07-21 22:05:41,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-07-21 22:05:41,525 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 55 [2018-07-21 22:05:41,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:05:41,526 INFO L225 Difference]: With dead ends: 111 [2018-07-21 22:05:41,526 INFO L226 Difference]: Without dead ends: 107 [2018-07-21 22:05:41,526 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-07-21 22:05:41,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-07-21 22:05:41,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2018-07-21 22:05:41,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-07-21 22:05:41,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2018-07-21 22:05:41,531 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 55 [2018-07-21 22:05:41,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:05:41,531 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2018-07-21 22:05:41,531 INFO L472 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-07-21 22:05:41,531 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2018-07-21 22:05:41,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-07-21 22:05:41,531 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:05:41,532 INFO L358 BasicCegarLoop]: trace histogram [17, 16, 16, 1, 1, 1, 1, 1, 1] [2018-07-21 22:05:41,532 INFO L414 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:05:41,532 INFO L82 PathProgramCache]: Analyzing trace with hash 985908113, now seen corresponding path program 16 times [2018-07-21 22:05:41,532 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:05:41,532 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:05:41,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:05:41,533 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:05:41,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:05:41,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:05:42,705 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:05:42,705 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:05:42,706 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:05:42,711 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-21 22:05:42,725 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-21 22:05:42,725 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:05:42,726 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:05:42,737 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:05:42,756 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:05:42,756 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-07-21 22:05:42,756 INFO L450 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-07-21 22:05:42,757 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-07-21 22:05:42,757 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-07-21 22:05:42,757 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 19 states. [2018-07-21 22:05:43,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:05:43,062 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2018-07-21 22:05:43,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-07-21 22:05:43,062 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 55 [2018-07-21 22:05:43,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:05:43,062 INFO L225 Difference]: With dead ends: 114 [2018-07-21 22:05:43,062 INFO L226 Difference]: Without dead ends: 110 [2018-07-21 22:05:43,063 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-07-21 22:05:43,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-07-21 22:05:43,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2018-07-21 22:05:43,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-07-21 22:05:43,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 111 transitions. [2018-07-21 22:05:43,067 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 111 transitions. Word has length 55 [2018-07-21 22:05:43,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:05:43,067 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 111 transitions. [2018-07-21 22:05:43,067 INFO L472 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-07-21 22:05:43,067 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 111 transitions. [2018-07-21 22:05:43,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-07-21 22:05:43,067 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:05:43,068 INFO L358 BasicCegarLoop]: trace histogram [18, 17, 17, 1, 1, 1, 1, 1, 1] [2018-07-21 22:05:43,068 INFO L414 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:05:43,068 INFO L82 PathProgramCache]: Analyzing trace with hash -964041460, now seen corresponding path program 17 times [2018-07-21 22:05:43,068 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:05:43,068 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:05:43,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:05:43,070 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:05:43,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:05:43,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:05:43,445 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:05:43,446 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:05:43,446 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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) [2018-07-21 22:05:43,460 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:05:59,880 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-07-21 22:05:59,880 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:05:59,908 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:05:59,918 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:05:59,938 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:05:59,938 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-07-21 22:05:59,938 INFO L450 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-07-21 22:05:59,938 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-07-21 22:05:59,938 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-07-21 22:05:59,938 INFO L87 Difference]: Start difference. First operand 109 states and 111 transitions. Second operand 20 states. [2018-07-21 22:06:00,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:06:00,244 INFO L93 Difference]: Finished difference Result 117 states and 119 transitions. [2018-07-21 22:06:00,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-07-21 22:06:00,244 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 58 [2018-07-21 22:06:00,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:06:00,245 INFO L225 Difference]: With dead ends: 117 [2018-07-21 22:06:00,245 INFO L226 Difference]: Without dead ends: 113 [2018-07-21 22:06:00,245 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-07-21 22:06:00,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-07-21 22:06:00,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2018-07-21 22:06:00,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-07-21 22:06:00,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2018-07-21 22:06:00,251 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 58 [2018-07-21 22:06:00,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:06:00,251 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2018-07-21 22:06:00,251 INFO L472 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-07-21 22:06:00,251 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2018-07-21 22:06:00,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-07-21 22:06:00,254 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:06:00,254 INFO L358 BasicCegarLoop]: trace histogram [18, 17, 17, 1, 1, 1, 1, 1, 1] [2018-07-21 22:06:00,254 INFO L414 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:06:00,254 INFO L82 PathProgramCache]: Analyzing trace with hash -536171058, now seen corresponding path program 17 times [2018-07-21 22:06:00,254 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:06:00,254 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:06:00,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:06:00,255 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:06:00,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:06:00,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:06:00,895 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:06:00,896 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:06:00,896 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:06:00,901 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-21 22:06:44,267 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-07-21 22:06:44,268 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:06:44,423 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:06:44,433 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:06:44,453 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:06:44,454 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-07-21 22:06:44,454 INFO L450 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-07-21 22:06:44,454 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-07-21 22:06:44,454 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-07-21 22:06:44,454 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand 20 states. [2018-07-21 22:06:44,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:06:44,786 INFO L93 Difference]: Finished difference Result 120 states and 122 transitions. [2018-07-21 22:06:44,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-07-21 22:06:44,787 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 58 [2018-07-21 22:06:44,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:06:44,787 INFO L225 Difference]: With dead ends: 120 [2018-07-21 22:06:44,787 INFO L226 Difference]: Without dead ends: 116 [2018-07-21 22:06:44,788 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-07-21 22:06:44,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-07-21 22:06:44,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2018-07-21 22:06:44,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-07-21 22:06:44,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2018-07-21 22:06:44,794 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 58 [2018-07-21 22:06:44,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:06:44,794 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2018-07-21 22:06:44,794 INFO L472 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-07-21 22:06:44,795 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2018-07-21 22:06:44,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-07-21 22:06:44,795 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:06:44,795 INFO L358 BasicCegarLoop]: trace histogram [19, 18, 18, 1, 1, 1, 1, 1, 1] [2018-07-21 22:06:44,795 INFO L414 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:06:44,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1993963599, now seen corresponding path program 18 times [2018-07-21 22:06:44,796 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:06:44,796 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:06:44,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:06:44,796 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:06:44,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:06:44,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:06:45,087 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:06:45,087 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:06:45,087 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:06:45,093 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-21 22:07:21,579 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-07-21 22:07:21,579 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:07:21,732 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:07:21,760 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:07:21,780 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:07:21,780 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-07-21 22:07:21,780 INFO L450 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-07-21 22:07:21,781 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-07-21 22:07:21,781 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-07-21 22:07:21,781 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand 21 states. [2018-07-21 22:07:22,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:07:22,113 INFO L93 Difference]: Finished difference Result 123 states and 125 transitions. [2018-07-21 22:07:22,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-07-21 22:07:22,114 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 61 [2018-07-21 22:07:22,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:07:22,115 INFO L225 Difference]: With dead ends: 123 [2018-07-21 22:07:22,115 INFO L226 Difference]: Without dead ends: 119 [2018-07-21 22:07:22,115 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-07-21 22:07:22,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-07-21 22:07:22,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2018-07-21 22:07:22,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-07-21 22:07:22,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2018-07-21 22:07:22,121 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 61 [2018-07-21 22:07:22,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:07:22,122 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2018-07-21 22:07:22,122 INFO L472 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-07-21 22:07:22,122 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2018-07-21 22:07:22,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-07-21 22:07:22,122 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:07:22,122 INFO L358 BasicCegarLoop]: trace histogram [19, 18, 18, 1, 1, 1, 1, 1, 1] [2018-07-21 22:07:22,123 INFO L414 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:07:22,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1467956849, now seen corresponding path program 18 times [2018-07-21 22:07:22,123 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:07:22,123 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:07:22,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:07:22,124 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:07:22,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:07:22,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:07:22,466 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:07:22,467 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:07:22,500 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:07:22,505 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-21 22:07:29,894 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-07-21 22:07:29,894 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:07:29,912 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:07:29,974 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:07:29,994 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:07:29,994 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-07-21 22:07:29,994 INFO L450 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-07-21 22:07:29,994 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-07-21 22:07:29,994 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-07-21 22:07:29,994 INFO L87 Difference]: Start difference. First operand 118 states and 120 transitions. Second operand 21 states. [2018-07-21 22:07:30,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:07:30,369 INFO L93 Difference]: Finished difference Result 126 states and 128 transitions. [2018-07-21 22:07:30,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-07-21 22:07:30,369 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 61 [2018-07-21 22:07:30,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:07:30,370 INFO L225 Difference]: With dead ends: 126 [2018-07-21 22:07:30,370 INFO L226 Difference]: Without dead ends: 122 [2018-07-21 22:07:30,370 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-07-21 22:07:30,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-07-21 22:07:30,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2018-07-21 22:07:30,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-07-21 22:07:30,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 123 transitions. [2018-07-21 22:07:30,375 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 123 transitions. Word has length 61 [2018-07-21 22:07:30,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:07:30,375 INFO L471 AbstractCegarLoop]: Abstraction has 121 states and 123 transitions. [2018-07-21 22:07:30,375 INFO L472 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-07-21 22:07:30,375 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 123 transitions. [2018-07-21 22:07:30,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-07-21 22:07:30,376 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:07:30,376 INFO L358 BasicCegarLoop]: trace histogram [20, 19, 19, 1, 1, 1, 1, 1, 1] [2018-07-21 22:07:30,376 INFO L414 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:07:30,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1158043924, now seen corresponding path program 19 times [2018-07-21 22:07:30,376 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:07:30,376 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:07:30,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:07:30,377 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:07:30,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:07:30,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:07:31,080 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:07:31,080 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:07:31,080 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:07:31,087 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:07:31,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:07:31,101 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:07:31,138 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:07:31,169 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:07:31,170 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-07-21 22:07:31,170 INFO L450 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-07-21 22:07:31,170 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-07-21 22:07:31,170 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-07-21 22:07:31,171 INFO L87 Difference]: Start difference. First operand 121 states and 123 transitions. Second operand 22 states. [2018-07-21 22:07:31,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:07:31,530 INFO L93 Difference]: Finished difference Result 129 states and 131 transitions. [2018-07-21 22:07:31,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-07-21 22:07:31,530 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 64 [2018-07-21 22:07:31,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:07:31,530 INFO L225 Difference]: With dead ends: 129 [2018-07-21 22:07:31,531 INFO L226 Difference]: Without dead ends: 125 [2018-07-21 22:07:31,531 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-07-21 22:07:31,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-07-21 22:07:31,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2018-07-21 22:07:31,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-07-21 22:07:31,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 126 transitions. [2018-07-21 22:07:31,537 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 126 transitions. Word has length 64 [2018-07-21 22:07:31,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:07:31,538 INFO L471 AbstractCegarLoop]: Abstraction has 124 states and 126 transitions. [2018-07-21 22:07:31,538 INFO L472 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-07-21 22:07:31,538 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 126 transitions. [2018-07-21 22:07:31,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-07-21 22:07:31,539 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:07:31,539 INFO L358 BasicCegarLoop]: trace histogram [20, 19, 19, 1, 1, 1, 1, 1, 1] [2018-07-21 22:07:31,539 INFO L414 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:07:31,539 INFO L82 PathProgramCache]: Analyzing trace with hash 2102052590, now seen corresponding path program 19 times [2018-07-21 22:07:31,539 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:07:31,539 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:07:31,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:07:31,540 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:07:31,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:07:31,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:07:32,051 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:07:32,051 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:07:32,051 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:07:32,057 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:07:32,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:07:32,074 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:07:32,105 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:07:32,137 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:07:32,137 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-07-21 22:07:32,137 INFO L450 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-07-21 22:07:32,138 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-07-21 22:07:32,138 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-07-21 22:07:32,138 INFO L87 Difference]: Start difference. First operand 124 states and 126 transitions. Second operand 22 states. [2018-07-21 22:07:32,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:07:32,560 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2018-07-21 22:07:32,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-07-21 22:07:32,561 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 64 [2018-07-21 22:07:32,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:07:32,562 INFO L225 Difference]: With dead ends: 132 [2018-07-21 22:07:32,562 INFO L226 Difference]: Without dead ends: 128 [2018-07-21 22:07:32,562 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-07-21 22:07:32,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-07-21 22:07:32,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2018-07-21 22:07:32,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-07-21 22:07:32,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 129 transitions. [2018-07-21 22:07:32,570 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 129 transitions. Word has length 64 [2018-07-21 22:07:32,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:07:32,570 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 129 transitions. [2018-07-21 22:07:32,570 INFO L472 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-07-21 22:07:32,570 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 129 transitions. [2018-07-21 22:07:32,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-07-21 22:07:32,571 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:07:32,571 INFO L358 BasicCegarLoop]: trace histogram [21, 20, 20, 1, 1, 1, 1, 1, 1] [2018-07-21 22:07:32,571 INFO L414 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:07:32,572 INFO L82 PathProgramCache]: Analyzing trace with hash -495388207, now seen corresponding path program 20 times [2018-07-21 22:07:32,572 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:07:32,572 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:07:32,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:07:32,572 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:07:32,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:07:32,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:07:32,985 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:07:32,985 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:07:32,985 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:07:32,991 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-21 22:07:33,007 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-21 22:07:33,007 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:07:33,009 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:07:33,024 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:07:33,044 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:07:33,044 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-07-21 22:07:33,044 INFO L450 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-07-21 22:07:33,044 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-07-21 22:07:33,045 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-07-21 22:07:33,045 INFO L87 Difference]: Start difference. First operand 127 states and 129 transitions. Second operand 23 states. [2018-07-21 22:07:33,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:07:33,466 INFO L93 Difference]: Finished difference Result 135 states and 137 transitions. [2018-07-21 22:07:33,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-07-21 22:07:33,467 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 67 [2018-07-21 22:07:33,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:07:33,467 INFO L225 Difference]: With dead ends: 135 [2018-07-21 22:07:33,467 INFO L226 Difference]: Without dead ends: 131 [2018-07-21 22:07:33,468 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-07-21 22:07:33,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-07-21 22:07:33,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2018-07-21 22:07:33,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-07-21 22:07:33,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 132 transitions. [2018-07-21 22:07:33,475 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 132 transitions. Word has length 67 [2018-07-21 22:07:33,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:07:33,476 INFO L471 AbstractCegarLoop]: Abstraction has 130 states and 132 transitions. [2018-07-21 22:07:33,476 INFO L472 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-07-21 22:07:33,476 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 132 transitions. [2018-07-21 22:07:33,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-07-21 22:07:33,477 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:07:33,477 INFO L358 BasicCegarLoop]: trace histogram [21, 20, 20, 1, 1, 1, 1, 1, 1] [2018-07-21 22:07:33,477 INFO L414 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:07:33,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1112862383, now seen corresponding path program 20 times [2018-07-21 22:07:33,478 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:07:33,478 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:07:33,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:07:33,478 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:07:33,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:07:33,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:07:33,858 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:07:33,858 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:07:33,859 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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) [2018-07-21 22:07:33,870 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:07:33,887 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-21 22:07:33,888 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:07:33,889 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:07:33,917 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:07:33,936 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:07:33,936 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-07-21 22:07:33,936 INFO L450 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-07-21 22:07:33,936 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-07-21 22:07:33,937 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-07-21 22:07:33,937 INFO L87 Difference]: Start difference. First operand 130 states and 132 transitions. Second operand 23 states. [2018-07-21 22:07:34,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:07:34,379 INFO L93 Difference]: Finished difference Result 138 states and 140 transitions. [2018-07-21 22:07:34,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-07-21 22:07:34,379 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 67 [2018-07-21 22:07:34,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:07:34,380 INFO L225 Difference]: With dead ends: 138 [2018-07-21 22:07:34,380 INFO L226 Difference]: Without dead ends: 134 [2018-07-21 22:07:34,380 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-07-21 22:07:34,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-07-21 22:07:34,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2018-07-21 22:07:34,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-07-21 22:07:34,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 135 transitions. [2018-07-21 22:07:34,387 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 135 transitions. Word has length 67 [2018-07-21 22:07:34,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:07:34,388 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 135 transitions. [2018-07-21 22:07:34,388 INFO L472 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-07-21 22:07:34,388 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 135 transitions. [2018-07-21 22:07:34,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-07-21 22:07:34,389 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:07:34,389 INFO L358 BasicCegarLoop]: trace histogram [22, 21, 21, 1, 1, 1, 1, 1, 1] [2018-07-21 22:07:34,389 INFO L414 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:07:34,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1011384524, now seen corresponding path program 21 times [2018-07-21 22:07:34,389 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:07:34,389 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:07:34,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:07:34,390 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:07:34,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:07:34,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:07:35,249 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:07:35,249 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:07:35,249 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:07:35,255 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-21 22:08:00,162 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-07-21 22:08:00,162 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:08:00,176 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:08:00,203 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:08:00,223 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:08:00,223 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-07-21 22:08:00,223 INFO L450 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-07-21 22:08:00,223 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-07-21 22:08:00,224 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-07-21 22:08:00,224 INFO L87 Difference]: Start difference. First operand 133 states and 135 transitions. Second operand 24 states. [2018-07-21 22:08:01,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:08:01,526 INFO L93 Difference]: Finished difference Result 141 states and 143 transitions. [2018-07-21 22:08:01,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-07-21 22:08:01,527 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 70 [2018-07-21 22:08:01,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:08:01,527 INFO L225 Difference]: With dead ends: 141 [2018-07-21 22:08:01,528 INFO L226 Difference]: Without dead ends: 137 [2018-07-21 22:08:01,528 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-07-21 22:08:01,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-07-21 22:08:01,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2018-07-21 22:08:01,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-07-21 22:08:01,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2018-07-21 22:08:01,532 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 70 [2018-07-21 22:08:01,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:08:01,532 INFO L471 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2018-07-21 22:08:01,532 INFO L472 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-07-21 22:08:01,533 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2018-07-21 22:08:01,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-07-21 22:08:01,533 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:08:01,533 INFO L358 BasicCegarLoop]: trace histogram [22, 21, 21, 1, 1, 1, 1, 1, 1] [2018-07-21 22:08:01,533 INFO L414 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:08:01,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1125877774, now seen corresponding path program 21 times [2018-07-21 22:08:01,534 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:08:01,534 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:08:01,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:08:01,535 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:08:01,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:08:01,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:08:01,942 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:08:01,942 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:08:01,942 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:08:01,948 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-21 22:09:02,461 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-07-21 22:09:02,462 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:09:02,646 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:09:02,701 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:09:02,722 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:09:02,722 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-07-21 22:09:02,722 INFO L450 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-07-21 22:09:02,722 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-07-21 22:09:02,722 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-07-21 22:09:02,723 INFO L87 Difference]: Start difference. First operand 136 states and 138 transitions. Second operand 24 states. [2018-07-21 22:09:03,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:09:03,211 INFO L93 Difference]: Finished difference Result 144 states and 146 transitions. [2018-07-21 22:09:03,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-07-21 22:09:03,212 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 70 [2018-07-21 22:09:03,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:09:03,212 INFO L225 Difference]: With dead ends: 144 [2018-07-21 22:09:03,212 INFO L226 Difference]: Without dead ends: 140 [2018-07-21 22:09:03,213 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-07-21 22:09:03,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-07-21 22:09:03,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2018-07-21 22:09:03,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-07-21 22:09:03,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 141 transitions. [2018-07-21 22:09:03,218 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 141 transitions. Word has length 70 [2018-07-21 22:09:03,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:09:03,219 INFO L471 AbstractCegarLoop]: Abstraction has 139 states and 141 transitions. [2018-07-21 22:09:03,219 INFO L472 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-07-21 22:09:03,219 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 141 transitions. [2018-07-21 22:09:03,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-07-21 22:09:03,219 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:09:03,219 INFO L358 BasicCegarLoop]: trace histogram [23, 22, 22, 1, 1, 1, 1, 1, 1] [2018-07-21 22:09:03,220 INFO L414 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:09:03,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1720364047, now seen corresponding path program 22 times [2018-07-21 22:09:03,220 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:09:03,220 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:09:03,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:09:03,222 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:09:03,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:09:03,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:09:03,637 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:09:03,637 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:09:03,638 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:09:03,645 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-21 22:09:03,659 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-21 22:09:03,660 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:09:03,661 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:09:03,680 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:09:03,699 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:09:03,699 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-07-21 22:09:03,700 INFO L450 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-07-21 22:09:03,700 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-07-21 22:09:03,700 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-07-21 22:09:03,700 INFO L87 Difference]: Start difference. First operand 139 states and 141 transitions. Second operand 25 states. [2018-07-21 22:09:04,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:09:04,126 INFO L93 Difference]: Finished difference Result 147 states and 149 transitions. [2018-07-21 22:09:04,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-07-21 22:09:04,127 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 73 [2018-07-21 22:09:04,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:09:04,127 INFO L225 Difference]: With dead ends: 147 [2018-07-21 22:09:04,128 INFO L226 Difference]: Without dead ends: 143 [2018-07-21 22:09:04,128 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-07-21 22:09:04,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-07-21 22:09:04,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2018-07-21 22:09:04,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-07-21 22:09:04,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 144 transitions. [2018-07-21 22:09:04,135 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 144 transitions. Word has length 73 [2018-07-21 22:09:04,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:09:04,135 INFO L471 AbstractCegarLoop]: Abstraction has 142 states and 144 transitions. [2018-07-21 22:09:04,135 INFO L472 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-07-21 22:09:04,135 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 144 transitions. [2018-07-21 22:09:04,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-07-21 22:09:04,136 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:09:04,136 INFO L358 BasicCegarLoop]: trace histogram [23, 22, 22, 1, 1, 1, 1, 1, 1] [2018-07-21 22:09:04,136 INFO L414 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:09:04,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1113244623, now seen corresponding path program 22 times [2018-07-21 22:09:04,136 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:09:04,136 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:09:04,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:09:04,138 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:09:04,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:09:04,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:09:04,670 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:09:04,670 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:09:04,670 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:09:04,676 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-21 22:09:04,694 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-21 22:09:04,694 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:09:04,696 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:09:04,709 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:09:04,728 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:09:04,728 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-07-21 22:09:04,729 INFO L450 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-07-21 22:09:04,729 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-07-21 22:09:04,729 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-07-21 22:09:04,729 INFO L87 Difference]: Start difference. First operand 142 states and 144 transitions. Second operand 25 states. [2018-07-21 22:09:05,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:09:05,337 INFO L93 Difference]: Finished difference Result 150 states and 152 transitions. [2018-07-21 22:09:05,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-07-21 22:09:05,367 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 73 [2018-07-21 22:09:05,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:09:05,368 INFO L225 Difference]: With dead ends: 150 [2018-07-21 22:09:05,368 INFO L226 Difference]: Without dead ends: 146 [2018-07-21 22:09:05,368 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-07-21 22:09:05,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-07-21 22:09:05,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2018-07-21 22:09:05,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-07-21 22:09:05,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 147 transitions. [2018-07-21 22:09:05,375 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 147 transitions. Word has length 73 [2018-07-21 22:09:05,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:09:05,375 INFO L471 AbstractCegarLoop]: Abstraction has 145 states and 147 transitions. [2018-07-21 22:09:05,375 INFO L472 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-07-21 22:09:05,375 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 147 transitions. [2018-07-21 22:09:05,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-07-21 22:09:05,376 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:09:05,376 INFO L358 BasicCegarLoop]: trace histogram [24, 23, 23, 1, 1, 1, 1, 1, 1] [2018-07-21 22:09:05,376 INFO L414 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:09:05,376 INFO L82 PathProgramCache]: Analyzing trace with hash 2093249196, now seen corresponding path program 23 times [2018-07-21 22:09:05,377 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:09:05,377 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:09:05,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:09:05,377 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:09:05,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:09:05,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:09:05,958 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:09:05,958 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:09:05,958 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:09:05,967 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown