java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf -i ../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/nested1.i_4.bplTransformedIcfg_BEv2_12.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d19836b [2018-09-26 21:45:01,205 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-26 21:45:01,207 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-26 21:45:01,220 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-26 21:45:01,220 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-26 21:45:01,221 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-26 21:45:01,222 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-26 21:45:01,224 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-26 21:45:01,226 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-26 21:45:01,227 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-26 21:45:01,228 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-26 21:45:01,228 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-26 21:45:01,230 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-26 21:45:01,231 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-26 21:45:01,238 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-26 21:45:01,240 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-26 21:45:01,241 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-26 21:45:01,247 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-26 21:45:01,249 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-26 21:45:01,253 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-26 21:45:01,255 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-26 21:45:01,257 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-26 21:45:01,261 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-26 21:45:01,261 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-26 21:45:01,261 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-26 21:45:01,263 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-26 21:45:01,264 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-26 21:45:01,265 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-26 21:45:01,268 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-26 21:45:01,269 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-26 21:45:01,271 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-26 21:45:01,272 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-26 21:45:01,272 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-26 21:45:01,272 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-26 21:45:01,275 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-26 21:45:01,276 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-26 21:45:01,277 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-09-26 21:45:01,305 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-26 21:45:01,306 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-26 21:45:01,310 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-26 21:45:01,311 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-26 21:45:01,312 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-26 21:45:01,312 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-26 21:45:01,312 INFO L133 SettingsManager]: * Use SBE=true [2018-09-26 21:45:01,312 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-26 21:45:01,312 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-26 21:45:01,313 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-26 21:45:01,313 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-26 21:45:01,313 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-26 21:45:01,313 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-26 21:45:01,313 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-26 21:45:01,314 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-26 21:45:01,314 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-26 21:45:01,314 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-26 21:45:01,314 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-26 21:45:01,315 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-26 21:45:01,315 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-26 21:45:01,316 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-26 21:45:01,316 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-26 21:45:01,316 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-26 21:45:01,316 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-26 21:45:01,317 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-26 21:45:01,317 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-26 21:45:01,317 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-26 21:45:01,317 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-26 21:45:01,318 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-26 21:45:01,318 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-26 21:45:01,318 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-09-26 21:45:01,390 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-26 21:45:01,406 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-26 21:45:01,411 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-26 21:45:01,413 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-26 21:45:01,414 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-26 21:45:01,415 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/nested1.i_4.bplTransformedIcfg_BEv2_12.bpl [2018-09-26 21:45:01,415 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/nested1.i_4.bplTransformedIcfg_BEv2_12.bpl' [2018-09-26 21:45:01,484 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-26 21:45:01,491 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-26 21:45:01,492 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-26 21:45:01,492 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-26 21:45:01,492 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-26 21:45:01,514 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:45:01" (1/1) ... [2018-09-26 21:45:01,528 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:45:01" (1/1) ... [2018-09-26 21:45:01,536 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-26 21:45:01,537 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-26 21:45:01,538 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-26 21:45:01,538 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-26 21:45:01,550 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:45:01" (1/1) ... [2018-09-26 21:45:01,550 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:45:01" (1/1) ... [2018-09-26 21:45:01,551 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:45:01" (1/1) ... [2018-09-26 21:45:01,551 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:45:01" (1/1) ... [2018-09-26 21:45:01,555 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:45:01" (1/1) ... [2018-09-26 21:45:01,557 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:45:01" (1/1) ... [2018-09-26 21:45:01,558 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:45:01" (1/1) ... [2018-09-26 21:45:01,560 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-26 21:45:01,561 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-26 21:45:01,561 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-26 21:45:01,561 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-26 21:45:01,563 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:45:01" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-26 21:45:01,627 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-09-26 21:45:01,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-26 21:45:01,628 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-26 21:45:01,794 INFO L346 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-26 21:45:01,795 INFO L202 PluginConnector]: Adding new model nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:45:01 BoogieIcfgContainer [2018-09-26 21:45:01,795 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-26 21:45:01,796 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-26 21:45:01,796 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-26 21:45:01,799 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-26 21:45:01,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:45:01" (1/2) ... [2018-09-26 21:45:01,800 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@609f9064 and model type nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.09 09:45:01, skipping insertion in model container [2018-09-26 21:45:01,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:45:01" (2/2) ... [2018-09-26 21:45:01,802 INFO L112 eAbstractionObserver]: Analyzing ICFG nested1.i_4.bplTransformedIcfg_BEv2_12.bpl [2018-09-26 21:45:01,812 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-26 21:45:01,821 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-26 21:45:01,872 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-26 21:45:01,873 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-26 21:45:01,873 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-26 21:45:01,873 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-26 21:45:01,873 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-26 21:45:01,874 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-26 21:45:01,874 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-26 21:45:01,874 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-26 21:45:01,874 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-26 21:45:01,890 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states. [2018-09-26 21:45:01,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-26 21:45:01,897 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:01,898 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-26 21:45:01,899 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:01,913 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:01,914 INFO L82 PathProgramCache]: Analyzing trace with hash 29955, now seen corresponding path program 1 times [2018-09-26 21:45:01,916 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:01,917 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:01,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:01,969 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:45:01,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:02,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:02,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:02,076 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:45:02,076 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-26 21:45:02,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-26 21:45:02,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-26 21:45:02,095 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:02,097 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 3 states. [2018-09-26 21:45:02,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:02,343 INFO L93 Difference]: Finished difference Result 11 states and 17 transitions. [2018-09-26 21:45:02,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-26 21:45:02,345 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-26 21:45:02,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:02,356 INFO L225 Difference]: With dead ends: 11 [2018-09-26 21:45:02,356 INFO L226 Difference]: Without dead ends: 7 [2018-09-26 21:45:02,360 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:02,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-26 21:45:02,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 6. [2018-09-26 21:45:02,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-26 21:45:02,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 7 transitions. [2018-09-26 21:45:02,398 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 7 transitions. Word has length 3 [2018-09-26 21:45:02,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:02,399 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 7 transitions. [2018-09-26 21:45:02,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-26 21:45:02,399 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 7 transitions. [2018-09-26 21:45:02,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-26 21:45:02,399 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:02,400 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-09-26 21:45:02,400 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:02,400 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:02,400 INFO L82 PathProgramCache]: Analyzing trace with hash 28854189, now seen corresponding path program 1 times [2018-09-26 21:45:02,400 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:02,401 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:02,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:02,402 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:45:02,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:02,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:02,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:02,456 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:45:02,456 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-26 21:45:02,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-26 21:45:02,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-26 21:45:02,458 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:02,458 INFO L87 Difference]: Start difference. First operand 6 states and 7 transitions. Second operand 3 states. [2018-09-26 21:45:02,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:02,536 INFO L93 Difference]: Finished difference Result 11 states and 14 transitions. [2018-09-26 21:45:02,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-26 21:45:02,537 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2018-09-26 21:45:02,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:02,538 INFO L225 Difference]: With dead ends: 11 [2018-09-26 21:45:02,538 INFO L226 Difference]: Without dead ends: 7 [2018-09-26 21:45:02,539 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:02,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-26 21:45:02,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-26 21:45:02,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-26 21:45:02,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2018-09-26 21:45:02,542 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 8 transitions. Word has length 5 [2018-09-26 21:45:02,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:02,542 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 8 transitions. [2018-09-26 21:45:02,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-26 21:45:02,542 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 8 transitions. [2018-09-26 21:45:02,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-26 21:45:02,543 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:02,543 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-09-26 21:45:02,543 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:02,543 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:02,544 INFO L82 PathProgramCache]: Analyzing trace with hash 894431694, now seen corresponding path program 1 times [2018-09-26 21:45:02,544 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:02,544 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:02,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:02,545 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:45:02,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:02,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:02,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:02,622 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:02,623 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:02,634 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:45:02,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:02,665 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:02,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:02,766 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:02,766 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-26 21:45:02,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-26 21:45:02,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-26 21:45:02,768 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:02,768 INFO L87 Difference]: Start difference. First operand 7 states and 8 transitions. Second operand 4 states. [2018-09-26 21:45:03,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:03,025 INFO L93 Difference]: Finished difference Result 13 states and 16 transitions. [2018-09-26 21:45:03,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-26 21:45:03,029 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-09-26 21:45:03,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:03,030 INFO L225 Difference]: With dead ends: 13 [2018-09-26 21:45:03,030 INFO L226 Difference]: Without dead ends: 8 [2018-09-26 21:45:03,030 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:03,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-26 21:45:03,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-26 21:45:03,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-26 21:45:03,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2018-09-26 21:45:03,034 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2018-09-26 21:45:03,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:03,036 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2018-09-26 21:45:03,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-26 21:45:03,036 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2018-09-26 21:45:03,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-26 21:45:03,037 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:03,037 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2018-09-26 21:45:03,037 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:03,038 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:03,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1957530573, now seen corresponding path program 2 times [2018-09-26 21:45:03,038 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:03,038 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:03,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:03,040 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:45:03,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:03,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:03,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-26 21:45:03,143 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:03,143 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:03,158 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:45:03,198 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:45:03,198 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:03,200 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:03,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:03,317 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:03,318 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5] total 7 [2018-09-26 21:45:03,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-26 21:45:03,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-26 21:45:03,319 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:03,319 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 7 states. [2018-09-26 21:45:04,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:04,022 INFO L93 Difference]: Finished difference Result 24 states and 32 transitions. [2018-09-26 21:45:04,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-26 21:45:04,023 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-09-26 21:45:04,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:04,024 INFO L225 Difference]: With dead ends: 24 [2018-09-26 21:45:04,024 INFO L226 Difference]: Without dead ends: 18 [2018-09-26 21:45:04,025 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:04,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-26 21:45:04,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 14. [2018-09-26 21:45:04,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-26 21:45:04,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-09-26 21:45:04,030 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 7 [2018-09-26 21:45:04,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:04,031 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-09-26 21:45:04,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-26 21:45:04,031 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-09-26 21:45:04,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:45:04,032 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:04,032 INFO L375 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1] [2018-09-26 21:45:04,032 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:04,033 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:04,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1143121891, now seen corresponding path program 3 times [2018-09-26 21:45:04,033 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:04,033 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:04,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:04,034 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:04,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:04,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:04,133 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-09-26 21:45:04,135 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:04,135 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:04,143 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:45:04,161 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-26 21:45:04,161 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:04,163 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:04,189 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-09-26 21:45:04,211 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:04,211 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-26 21:45:04,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-26 21:45:04,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-26 21:45:04,212 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:04,213 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 6 states. [2018-09-26 21:45:04,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:04,617 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2018-09-26 21:45:04,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-26 21:45:04,617 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2018-09-26 21:45:04,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:04,618 INFO L225 Difference]: With dead ends: 24 [2018-09-26 21:45:04,618 INFO L226 Difference]: Without dead ends: 16 [2018-09-26 21:45:04,619 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:04,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-26 21:45:04,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-26 21:45:04,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-26 21:45:04,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2018-09-26 21:45:04,624 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 13 [2018-09-26 21:45:04,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:04,624 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2018-09-26 21:45:04,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-26 21:45:04,625 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2018-09-26 21:45:04,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:45:04,625 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:04,626 INFO L375 BasicCegarLoop]: trace histogram [8, 2, 2, 1, 1, 1] [2018-09-26 21:45:04,626 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:04,626 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:04,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1762706263, now seen corresponding path program 4 times [2018-09-26 21:45:04,627 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:04,627 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:04,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:04,628 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:04,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:04,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:04,815 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-09-26 21:45:04,816 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:04,816 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:04,828 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:45:04,841 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:45:04,841 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:04,844 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:04,910 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-09-26 21:45:04,930 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:04,931 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7] total 10 [2018-09-26 21:45:04,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:45:04,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:45:04,931 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:04,932 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 10 states. [2018-09-26 21:45:06,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:06,055 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2018-09-26 21:45:06,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-26 21:45:06,055 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2018-09-26 21:45:06,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:06,056 INFO L225 Difference]: With dead ends: 40 [2018-09-26 21:45:06,056 INFO L226 Difference]: Without dead ends: 31 [2018-09-26 21:45:06,056 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:06,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-26 21:45:06,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2018-09-26 21:45:06,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-26 21:45:06,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2018-09-26 21:45:06,063 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 15 [2018-09-26 21:45:06,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:06,064 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2018-09-26 21:45:06,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:45:06,064 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2018-09-26 21:45:06,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-26 21:45:06,065 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:06,065 INFO L375 BasicCegarLoop]: trace histogram [15, 3, 3, 1, 1, 1] [2018-09-26 21:45:06,065 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:06,066 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:06,066 INFO L82 PathProgramCache]: Analyzing trace with hash 198739950, now seen corresponding path program 5 times [2018-09-26 21:45:06,066 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:06,066 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:06,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:06,067 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:06,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:06,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:06,267 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-09-26 21:45:06,267 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:06,267 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:06,275 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:45:06,292 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-26 21:45:06,292 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:06,293 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:06,392 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 112 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2018-09-26 21:45:06,415 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:06,415 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 12 [2018-09-26 21:45:06,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-26 21:45:06,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-26 21:45:06,416 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:06,417 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 12 states. [2018-09-26 21:45:07,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:07,555 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2018-09-26 21:45:07,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-26 21:45:07,556 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 24 [2018-09-26 21:45:07,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:07,556 INFO L225 Difference]: With dead ends: 60 [2018-09-26 21:45:07,557 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:45:07,557 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:07,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:45:07,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2018-09-26 21:45:07,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-26 21:45:07,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2018-09-26 21:45:07,567 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 24 [2018-09-26 21:45:07,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:07,568 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2018-09-26 21:45:07,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-26 21:45:07,568 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2018-09-26 21:45:07,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-26 21:45:07,569 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:07,569 INFO L375 BasicCegarLoop]: trace histogram [24, 4, 4, 1, 1, 1] [2018-09-26 21:45:07,570 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:07,570 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:07,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1597467349, now seen corresponding path program 6 times [2018-09-26 21:45:07,570 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:07,571 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:07,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:07,572 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:07,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:07,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:07,711 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 151 proven. 21 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2018-09-26 21:45:07,712 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:07,712 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:07,728 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:45:07,778 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-26 21:45:07,779 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:07,782 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:07,825 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 251 proven. 21 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2018-09-26 21:45:07,847 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:07,848 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:45:07,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:45:07,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:45:07,848 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:07,849 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 9 states. [2018-09-26 21:45:07,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:07,946 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2018-09-26 21:45:07,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:45:07,946 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2018-09-26 21:45:07,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:07,947 INFO L225 Difference]: With dead ends: 67 [2018-09-26 21:45:07,947 INFO L226 Difference]: Without dead ends: 40 [2018-09-26 21:45:07,948 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:07,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-26 21:45:07,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-26 21:45:07,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-26 21:45:07,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2018-09-26 21:45:07,956 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 35 [2018-09-26 21:45:07,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:07,956 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2018-09-26 21:45:07,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:45:07,957 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2018-09-26 21:45:07,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-26 21:45:07,958 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:07,959 INFO L375 BasicCegarLoop]: trace histogram [28, 4, 4, 1, 1, 1] [2018-09-26 21:45:07,959 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:07,959 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:07,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1404785213, now seen corresponding path program 7 times [2018-09-26 21:45:07,959 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:07,959 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:07,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:07,961 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:07,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:07,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:08,112 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 394 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2018-09-26 21:45:08,112 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:08,113 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:08,129 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:45:08,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:08,173 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:08,257 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 196 proven. 28 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2018-09-26 21:45:08,279 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:08,280 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 15 [2018-09-26 21:45:08,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-26 21:45:08,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-26 21:45:08,281 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:08,281 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 15 states. [2018-09-26 21:45:11,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:11,273 INFO L93 Difference]: Finished difference Result 93 states and 109 transitions. [2018-09-26 21:45:11,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-26 21:45:11,274 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2018-09-26 21:45:11,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:11,275 INFO L225 Difference]: With dead ends: 93 [2018-09-26 21:45:11,275 INFO L226 Difference]: Without dead ends: 63 [2018-09-26 21:45:11,277 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:11,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-26 21:45:11,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2018-09-26 21:45:11,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-26 21:45:11,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2018-09-26 21:45:11,299 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 39 [2018-09-26 21:45:11,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:11,299 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2018-09-26 21:45:11,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-26 21:45:11,300 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2018-09-26 21:45:11,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-26 21:45:11,306 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:11,306 INFO L375 BasicCegarLoop]: trace histogram [40, 5, 5, 1, 1, 1] [2018-09-26 21:45:11,311 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:11,311 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:11,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1154943019, now seen corresponding path program 8 times [2018-09-26 21:45:11,311 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:11,312 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:11,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:11,316 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:45:11,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:11,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:11,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 0 proven. 825 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2018-09-26 21:45:11,465 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:11,465 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:11,475 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:45:11,537 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:45:11,538 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:11,541 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:11,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 329 proven. 36 refuted. 0 times theorem prover too weak. 640 trivial. 0 not checked. [2018-09-26 21:45:11,868 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:11,869 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 17 [2018-09-26 21:45:11,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-26 21:45:11,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-26 21:45:11,870 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:11,870 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 17 states. [2018-09-26 21:45:15,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:15,705 INFO L93 Difference]: Finished difference Result 123 states and 142 transitions. [2018-09-26 21:45:15,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-26 21:45:15,706 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 53 [2018-09-26 21:45:15,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:15,707 INFO L225 Difference]: With dead ends: 123 [2018-09-26 21:45:15,707 INFO L226 Difference]: Without dead ends: 80 [2018-09-26 21:45:15,707 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:15,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-26 21:45:15,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2018-09-26 21:45:15,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-26 21:45:15,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2018-09-26 21:45:15,721 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 53 [2018-09-26 21:45:15,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:15,722 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2018-09-26 21:45:15,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-26 21:45:15,722 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2018-09-26 21:45:15,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-26 21:45:15,724 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:15,724 INFO L375 BasicCegarLoop]: trace histogram [54, 6, 6, 1, 1, 1] [2018-09-26 21:45:15,725 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:15,725 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:15,725 INFO L82 PathProgramCache]: Analyzing trace with hash -2076506525, now seen corresponding path program 9 times [2018-09-26 21:45:15,725 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:15,725 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:15,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:15,726 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:15,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:15,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:15,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1791 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2018-09-26 21:45:15,959 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:15,959 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:15,967 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:45:16,135 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-26 21:45:16,136 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:16,141 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:16,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1791 backedges. 506 proven. 45 refuted. 0 times theorem prover too weak. 1240 trivial. 0 not checked. [2018-09-26 21:45:16,284 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:16,284 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 19 [2018-09-26 21:45:16,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-26 21:45:16,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-26 21:45:16,285 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:16,285 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand 19 states. [2018-09-26 21:45:21,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:21,398 INFO L93 Difference]: Finished difference Result 157 states and 179 transitions. [2018-09-26 21:45:21,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-26 21:45:21,398 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 69 [2018-09-26 21:45:21,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:21,399 INFO L225 Difference]: With dead ends: 157 [2018-09-26 21:45:21,399 INFO L226 Difference]: Without dead ends: 99 [2018-09-26 21:45:21,400 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:21,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-26 21:45:21,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 88. [2018-09-26 21:45:21,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-09-26 21:45:21,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 95 transitions. [2018-09-26 21:45:21,415 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 95 transitions. Word has length 69 [2018-09-26 21:45:21,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:21,415 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 95 transitions. [2018-09-26 21:45:21,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-26 21:45:21,415 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 95 transitions. [2018-09-26 21:45:21,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-09-26 21:45:21,417 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:21,417 INFO L375 BasicCegarLoop]: trace histogram [70, 7, 7, 1, 1, 1] [2018-09-26 21:45:21,417 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:21,418 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:21,418 INFO L82 PathProgramCache]: Analyzing trace with hash -815084279, now seen corresponding path program 10 times [2018-09-26 21:45:21,418 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:21,418 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:21,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:21,419 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:21,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:21,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:21,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2954 backedges. 0 proven. 2569 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2018-09-26 21:45:21,572 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:21,572 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:21,580 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:45:21,661 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:45:21,662 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:21,672 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:22,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2954 backedges. 0 proven. 2569 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2018-09-26 21:45:22,083 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:22,083 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:45:22,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:45:22,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:45:22,084 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:22,084 INFO L87 Difference]: Start difference. First operand 88 states and 95 transitions. Second operand 10 states. [2018-09-26 21:45:22,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:22,297 INFO L93 Difference]: Finished difference Result 113 states and 122 transitions. [2018-09-26 21:45:22,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:45:22,298 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 87 [2018-09-26 21:45:22,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:22,299 INFO L225 Difference]: With dead ends: 113 [2018-09-26 21:45:22,299 INFO L226 Difference]: Without dead ends: 111 [2018-09-26 21:45:22,299 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:22,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-26 21:45:22,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 100. [2018-09-26 21:45:22,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-26 21:45:22,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 108 transitions. [2018-09-26 21:45:22,319 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 108 transitions. Word has length 87 [2018-09-26 21:45:22,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:22,320 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 108 transitions. [2018-09-26 21:45:22,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:45:22,320 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 108 transitions. [2018-09-26 21:45:22,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-09-26 21:45:22,322 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:22,322 INFO L375 BasicCegarLoop]: trace histogram [80, 8, 8, 1, 1, 1] [2018-09-26 21:45:22,322 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:22,322 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:22,323 INFO L82 PathProgramCache]: Analyzing trace with hash 558484307, now seen corresponding path program 11 times [2018-09-26 21:45:22,323 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:22,323 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:22,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:22,324 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:22,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:22,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:22,485 INFO L134 CoverageAnalysis]: Checked inductivity of 3864 backedges. 0 proven. 3424 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2018-09-26 21:45:22,485 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:22,486 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:22,494 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:45:22,574 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-09-26 21:45:22,575 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:22,580 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:22,810 INFO L134 CoverageAnalysis]: Checked inductivity of 3864 backedges. 0 proven. 3424 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2018-09-26 21:45:22,832 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:22,832 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:45:22,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:45:22,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:45:22,833 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:22,833 INFO L87 Difference]: Start difference. First operand 100 states and 108 transitions. Second operand 11 states. [2018-09-26 21:45:22,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:22,958 INFO L93 Difference]: Finished difference Result 125 states and 135 transitions. [2018-09-26 21:45:22,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:45:22,959 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 99 [2018-09-26 21:45:22,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:22,960 INFO L225 Difference]: With dead ends: 125 [2018-09-26 21:45:22,960 INFO L226 Difference]: Without dead ends: 123 [2018-09-26 21:45:22,960 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:22,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-26 21:45:22,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 112. [2018-09-26 21:45:22,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-09-26 21:45:22,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 121 transitions. [2018-09-26 21:45:22,984 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 121 transitions. Word has length 99 [2018-09-26 21:45:22,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:22,984 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 121 transitions. [2018-09-26 21:45:22,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:45:22,985 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 121 transitions. [2018-09-26 21:45:22,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-09-26 21:45:22,986 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:22,987 INFO L375 BasicCegarLoop]: trace histogram [90, 9, 9, 1, 1, 1] [2018-09-26 21:45:22,987 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:22,987 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:22,987 INFO L82 PathProgramCache]: Analyzing trace with hash -2005161315, now seen corresponding path program 12 times [2018-09-26 21:45:22,987 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:22,988 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:22,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:22,988 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:22,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:23,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:23,253 INFO L134 CoverageAnalysis]: Checked inductivity of 4896 backedges. 0 proven. 4401 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-09-26 21:45:23,253 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:23,253 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:23,261 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:45:23,356 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 51 check-sat command(s) [2018-09-26 21:45:23,357 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:23,362 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:23,654 INFO L134 CoverageAnalysis]: Checked inductivity of 4896 backedges. 0 proven. 4401 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-09-26 21:45:23,676 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:23,676 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-26 21:45:23,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-26 21:45:23,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-26 21:45:23,677 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:23,677 INFO L87 Difference]: Start difference. First operand 112 states and 121 transitions. Second operand 12 states. [2018-09-26 21:45:23,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:23,788 INFO L93 Difference]: Finished difference Result 137 states and 148 transitions. [2018-09-26 21:45:23,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-26 21:45:23,788 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 111 [2018-09-26 21:45:23,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:23,790 INFO L225 Difference]: With dead ends: 137 [2018-09-26 21:45:23,790 INFO L226 Difference]: Without dead ends: 135 [2018-09-26 21:45:23,790 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:23,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-09-26 21:45:23,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 124. [2018-09-26 21:45:23,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-09-26 21:45:23,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 134 transitions. [2018-09-26 21:45:23,810 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 134 transitions. Word has length 111 [2018-09-26 21:45:23,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:23,811 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 134 transitions. [2018-09-26 21:45:23,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-26 21:45:23,811 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 134 transitions. [2018-09-26 21:45:23,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-09-26 21:45:23,813 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:23,813 INFO L375 BasicCegarLoop]: trace histogram [100, 10, 10, 1, 1, 1] [2018-09-26 21:45:23,813 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:23,813 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:23,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1028199705, now seen corresponding path program 13 times [2018-09-26 21:45:23,814 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:23,814 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:23,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:23,815 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:23,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:23,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:24,142 INFO L134 CoverageAnalysis]: Checked inductivity of 6050 backedges. 0 proven. 5500 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2018-09-26 21:45:24,142 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:24,142 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:24,150 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:45:24,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:24,227 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:24,444 INFO L134 CoverageAnalysis]: Checked inductivity of 6050 backedges. 0 proven. 5500 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2018-09-26 21:45:24,466 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:24,466 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-26 21:45:24,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-26 21:45:24,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-26 21:45:24,467 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:24,467 INFO L87 Difference]: Start difference. First operand 124 states and 134 transitions. Second operand 13 states. [2018-09-26 21:45:24,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:24,736 INFO L93 Difference]: Finished difference Result 149 states and 161 transitions. [2018-09-26 21:45:24,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-26 21:45:24,737 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 123 [2018-09-26 21:45:24,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:24,738 INFO L225 Difference]: With dead ends: 149 [2018-09-26 21:45:24,738 INFO L226 Difference]: Without dead ends: 147 [2018-09-26 21:45:24,739 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:24,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-26 21:45:24,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 136. [2018-09-26 21:45:24,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-09-26 21:45:24,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 147 transitions. [2018-09-26 21:45:24,758 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 147 transitions. Word has length 123 [2018-09-26 21:45:24,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:24,758 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 147 transitions. [2018-09-26 21:45:24,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-26 21:45:24,758 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 147 transitions. [2018-09-26 21:45:24,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-09-26 21:45:24,760 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:24,760 INFO L375 BasicCegarLoop]: trace histogram [110, 11, 11, 1, 1, 1] [2018-09-26 21:45:24,761 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:24,761 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:24,761 INFO L82 PathProgramCache]: Analyzing trace with hash 804391985, now seen corresponding path program 14 times [2018-09-26 21:45:24,761 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:24,761 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:24,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:24,762 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:45:24,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:24,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:25,164 INFO L134 CoverageAnalysis]: Checked inductivity of 7326 backedges. 0 proven. 6721 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2018-09-26 21:45:25,164 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:25,165 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:25,173 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:45:25,251 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:45:25,252 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:25,256 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:25,530 INFO L134 CoverageAnalysis]: Checked inductivity of 7326 backedges. 0 proven. 6721 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2018-09-26 21:45:25,551 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:25,551 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-26 21:45:25,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-26 21:45:25,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-26 21:45:25,552 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:25,552 INFO L87 Difference]: Start difference. First operand 136 states and 147 transitions. Second operand 14 states. [2018-09-26 21:45:25,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:25,731 INFO L93 Difference]: Finished difference Result 161 states and 174 transitions. [2018-09-26 21:45:25,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-26 21:45:25,732 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 135 [2018-09-26 21:45:25,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:25,733 INFO L225 Difference]: With dead ends: 161 [2018-09-26 21:45:25,733 INFO L226 Difference]: Without dead ends: 159 [2018-09-26 21:45:25,733 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:25,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-09-26 21:45:25,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 148. [2018-09-26 21:45:25,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-09-26 21:45:25,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 160 transitions. [2018-09-26 21:45:25,758 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 160 transitions. Word has length 135 [2018-09-26 21:45:25,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:25,758 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 160 transitions. [2018-09-26 21:45:25,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-26 21:45:25,758 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 160 transitions. [2018-09-26 21:45:25,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-09-26 21:45:25,760 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:25,760 INFO L375 BasicCegarLoop]: trace histogram [120, 12, 12, 1, 1, 1] [2018-09-26 21:45:25,760 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:25,761 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:25,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1919127163, now seen corresponding path program 15 times [2018-09-26 21:45:25,761 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:25,761 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:25,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:25,762 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:25,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:25,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:25,980 INFO L134 CoverageAnalysis]: Checked inductivity of 8724 backedges. 0 proven. 8064 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2018-09-26 21:45:25,980 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:25,980 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:25,987 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:45:26,160 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 73 check-sat command(s) [2018-09-26 21:45:26,160 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:26,163 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:26,433 INFO L134 CoverageAnalysis]: Checked inductivity of 8724 backedges. 0 proven. 8064 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2018-09-26 21:45:26,454 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:26,454 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-26 21:45:26,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-26 21:45:26,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-26 21:45:26,455 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:26,455 INFO L87 Difference]: Start difference. First operand 148 states and 160 transitions. Second operand 15 states. [2018-09-26 21:45:26,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:26,639 INFO L93 Difference]: Finished difference Result 173 states and 187 transitions. [2018-09-26 21:45:26,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-26 21:45:26,639 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 147 [2018-09-26 21:45:26,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:26,640 INFO L225 Difference]: With dead ends: 173 [2018-09-26 21:45:26,640 INFO L226 Difference]: Without dead ends: 171 [2018-09-26 21:45:26,641 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:26,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-09-26 21:45:26,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 160. [2018-09-26 21:45:26,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-09-26 21:45:26,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 173 transitions. [2018-09-26 21:45:26,666 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 173 transitions. Word has length 147 [2018-09-26 21:45:26,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:26,666 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 173 transitions. [2018-09-26 21:45:26,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-26 21:45:26,666 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 173 transitions. [2018-09-26 21:45:26,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-09-26 21:45:26,668 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:26,668 INFO L375 BasicCegarLoop]: trace histogram [130, 13, 13, 1, 1, 1] [2018-09-26 21:45:26,668 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:26,668 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:26,669 INFO L82 PathProgramCache]: Analyzing trace with hash 243397061, now seen corresponding path program 16 times [2018-09-26 21:45:26,669 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:26,669 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:26,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:26,670 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:26,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:26,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:27,405 INFO L134 CoverageAnalysis]: Checked inductivity of 10244 backedges. 0 proven. 9529 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2018-09-26 21:45:27,405 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:27,405 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:27,412 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:45:27,503 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:45:27,504 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:27,507 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:27,865 INFO L134 CoverageAnalysis]: Checked inductivity of 10244 backedges. 0 proven. 9529 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2018-09-26 21:45:27,886 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:27,886 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-26 21:45:27,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-26 21:45:27,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-26 21:45:27,887 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:27,887 INFO L87 Difference]: Start difference. First operand 160 states and 173 transitions. Second operand 16 states. [2018-09-26 21:45:28,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:28,115 INFO L93 Difference]: Finished difference Result 185 states and 200 transitions. [2018-09-26 21:45:28,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-26 21:45:28,115 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 159 [2018-09-26 21:45:28,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:28,117 INFO L225 Difference]: With dead ends: 185 [2018-09-26 21:45:28,117 INFO L226 Difference]: Without dead ends: 183 [2018-09-26 21:45:28,117 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:28,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-09-26 21:45:28,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 172. [2018-09-26 21:45:28,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-09-26 21:45:28,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 186 transitions. [2018-09-26 21:45:28,158 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 186 transitions. Word has length 159 [2018-09-26 21:45:28,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:28,158 INFO L480 AbstractCegarLoop]: Abstraction has 172 states and 186 transitions. [2018-09-26 21:45:28,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-26 21:45:28,158 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 186 transitions. [2018-09-26 21:45:28,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2018-09-26 21:45:28,160 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:28,160 INFO L375 BasicCegarLoop]: trace histogram [140, 14, 14, 1, 1, 1] [2018-09-26 21:45:28,160 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:28,160 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:28,161 INFO L82 PathProgramCache]: Analyzing trace with hash 184792591, now seen corresponding path program 17 times [2018-09-26 21:45:28,161 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:28,161 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:28,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:28,162 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:28,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:28,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:28,415 INFO L134 CoverageAnalysis]: Checked inductivity of 11886 backedges. 0 proven. 11116 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2018-09-26 21:45:28,415 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:28,415 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:28,431 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:45:28,641 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 85 check-sat command(s) [2018-09-26 21:45:28,641 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:28,645 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:28,996 INFO L134 CoverageAnalysis]: Checked inductivity of 11886 backedges. 0 proven. 11116 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2018-09-26 21:45:29,029 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:29,029 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-26 21:45:29,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-26 21:45:29,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-26 21:45:29,030 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:29,030 INFO L87 Difference]: Start difference. First operand 172 states and 186 transitions. Second operand 17 states. [2018-09-26 21:45:29,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:29,274 INFO L93 Difference]: Finished difference Result 197 states and 213 transitions. [2018-09-26 21:45:29,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-26 21:45:29,275 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 171 [2018-09-26 21:45:29,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:29,276 INFO L225 Difference]: With dead ends: 197 [2018-09-26 21:45:29,276 INFO L226 Difference]: Without dead ends: 195 [2018-09-26 21:45:29,277 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:29,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-09-26 21:45:29,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 184. [2018-09-26 21:45:29,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-09-26 21:45:29,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 199 transitions. [2018-09-26 21:45:29,305 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 199 transitions. Word has length 171 [2018-09-26 21:45:29,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:29,305 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 199 transitions. [2018-09-26 21:45:29,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-26 21:45:29,306 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 199 transitions. [2018-09-26 21:45:29,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-09-26 21:45:29,307 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:29,307 INFO L375 BasicCegarLoop]: trace histogram [150, 15, 15, 1, 1, 1] [2018-09-26 21:45:29,308 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:29,308 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:29,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1864410279, now seen corresponding path program 18 times [2018-09-26 21:45:29,308 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:29,308 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:29,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:29,309 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:29,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:29,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:29,579 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 0 proven. 12825 refuted. 0 times theorem prover too weak. 825 trivial. 0 not checked. [2018-09-26 21:45:29,579 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:29,579 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:29,587 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:45:30,210 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 86 check-sat command(s) [2018-09-26 21:45:30,211 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:30,216 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:30,548 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 0 proven. 12825 refuted. 0 times theorem prover too weak. 825 trivial. 0 not checked. [2018-09-26 21:45:30,569 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:30,569 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-26 21:45:30,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-26 21:45:30,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-26 21:45:30,570 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:30,570 INFO L87 Difference]: Start difference. First operand 184 states and 199 transitions. Second operand 18 states. [2018-09-26 21:45:30,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:30,795 INFO L93 Difference]: Finished difference Result 209 states and 226 transitions. [2018-09-26 21:45:30,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-26 21:45:30,796 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 183 [2018-09-26 21:45:30,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:30,797 INFO L225 Difference]: With dead ends: 209 [2018-09-26 21:45:30,797 INFO L226 Difference]: Without dead ends: 207 [2018-09-26 21:45:30,797 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:30,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-09-26 21:45:30,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 196. [2018-09-26 21:45:30,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-09-26 21:45:30,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 212 transitions. [2018-09-26 21:45:30,835 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 212 transitions. Word has length 183 [2018-09-26 21:45:30,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:30,836 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 212 transitions. [2018-09-26 21:45:30,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-26 21:45:30,836 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 212 transitions. [2018-09-26 21:45:30,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2018-09-26 21:45:30,837 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:30,837 INFO L375 BasicCegarLoop]: trace histogram [160, 16, 16, 1, 1, 1] [2018-09-26 21:45:30,838 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:30,838 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:30,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1957994077, now seen corresponding path program 19 times [2018-09-26 21:45:30,838 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:30,838 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:30,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:30,839 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:30,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:30,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:31,342 INFO L134 CoverageAnalysis]: Checked inductivity of 15536 backedges. 0 proven. 14656 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2018-09-26 21:45:31,343 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:31,343 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:31,350 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:45:31,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:31,464 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:31,852 INFO L134 CoverageAnalysis]: Checked inductivity of 15536 backedges. 0 proven. 14656 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2018-09-26 21:45:31,874 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:31,874 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-26 21:45:31,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-26 21:45:31,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-26 21:45:31,875 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:31,875 INFO L87 Difference]: Start difference. First operand 196 states and 212 transitions. Second operand 19 states. [2018-09-26 21:45:32,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:32,137 INFO L93 Difference]: Finished difference Result 221 states and 239 transitions. [2018-09-26 21:45:32,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-26 21:45:32,137 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 195 [2018-09-26 21:45:32,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:32,139 INFO L225 Difference]: With dead ends: 221 [2018-09-26 21:45:32,139 INFO L226 Difference]: Without dead ends: 219 [2018-09-26 21:45:32,139 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:32,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-09-26 21:45:32,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 208. [2018-09-26 21:45:32,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-09-26 21:45:32,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 225 transitions. [2018-09-26 21:45:32,182 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 225 transitions. Word has length 195 [2018-09-26 21:45:32,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:32,182 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 225 transitions. [2018-09-26 21:45:32,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-26 21:45:32,182 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 225 transitions. [2018-09-26 21:45:32,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-09-26 21:45:32,183 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:32,183 INFO L375 BasicCegarLoop]: trace histogram [170, 17, 17, 1, 1, 1] [2018-09-26 21:45:32,184 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:32,184 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:32,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1203652845, now seen corresponding path program 20 times [2018-09-26 21:45:32,184 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:32,184 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:32,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:32,185 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:45:32,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:32,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:32,706 INFO L134 CoverageAnalysis]: Checked inductivity of 17544 backedges. 0 proven. 16609 refuted. 0 times theorem prover too weak. 935 trivial. 0 not checked. [2018-09-26 21:45:32,706 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:32,706 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:32,715 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:45:32,828 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:45:32,828 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:32,832 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:33,198 INFO L134 CoverageAnalysis]: Checked inductivity of 17544 backedges. 0 proven. 16609 refuted. 0 times theorem prover too weak. 935 trivial. 0 not checked. [2018-09-26 21:45:33,219 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:33,219 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-26 21:45:33,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-26 21:45:33,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-26 21:45:33,220 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:33,220 INFO L87 Difference]: Start difference. First operand 208 states and 225 transitions. Second operand 20 states. [2018-09-26 21:45:33,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:33,468 INFO L93 Difference]: Finished difference Result 233 states and 252 transitions. [2018-09-26 21:45:33,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-26 21:45:33,471 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 207 [2018-09-26 21:45:33,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:33,472 INFO L225 Difference]: With dead ends: 233 [2018-09-26 21:45:33,472 INFO L226 Difference]: Without dead ends: 231 [2018-09-26 21:45:33,473 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:33,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2018-09-26 21:45:33,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 220. [2018-09-26 21:45:33,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2018-09-26 21:45:33,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 238 transitions. [2018-09-26 21:45:33,511 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 238 transitions. Word has length 207 [2018-09-26 21:45:33,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:33,511 INFO L480 AbstractCegarLoop]: Abstraction has 220 states and 238 transitions. [2018-09-26 21:45:33,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-26 21:45:33,511 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 238 transitions. [2018-09-26 21:45:33,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-09-26 21:45:33,512 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:33,512 INFO L375 BasicCegarLoop]: trace histogram [180, 18, 18, 1, 1, 1] [2018-09-26 21:45:33,512 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:33,513 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:33,513 INFO L82 PathProgramCache]: Analyzing trace with hash 367956279, now seen corresponding path program 21 times [2018-09-26 21:45:33,513 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:33,513 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:33,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:33,514 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:33,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:33,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:34,456 INFO L134 CoverageAnalysis]: Checked inductivity of 19674 backedges. 0 proven. 18684 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2018-09-26 21:45:34,456 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:34,456 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:34,468 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:45:34,720 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 109 check-sat command(s) [2018-09-26 21:45:34,720 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:34,725 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:35,313 INFO L134 CoverageAnalysis]: Checked inductivity of 19674 backedges. 0 proven. 18684 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2018-09-26 21:45:35,335 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:35,335 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-26 21:45:35,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-26 21:45:35,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-26 21:45:35,336 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:35,336 INFO L87 Difference]: Start difference. First operand 220 states and 238 transitions. Second operand 21 states. [2018-09-26 21:45:35,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:35,618 INFO L93 Difference]: Finished difference Result 245 states and 265 transitions. [2018-09-26 21:45:35,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-26 21:45:35,619 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 219 [2018-09-26 21:45:35,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:35,620 INFO L225 Difference]: With dead ends: 245 [2018-09-26 21:45:35,620 INFO L226 Difference]: Without dead ends: 243 [2018-09-26 21:45:35,621 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:35,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-09-26 21:45:35,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 232. [2018-09-26 21:45:35,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2018-09-26 21:45:35,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 251 transitions. [2018-09-26 21:45:35,670 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 251 transitions. Word has length 219 [2018-09-26 21:45:35,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:35,670 INFO L480 AbstractCegarLoop]: Abstraction has 232 states and 251 transitions. [2018-09-26 21:45:35,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-26 21:45:35,670 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 251 transitions. [2018-09-26 21:45:35,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2018-09-26 21:45:35,672 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:35,672 INFO L375 BasicCegarLoop]: trace histogram [190, 19, 19, 1, 1, 1] [2018-09-26 21:45:35,672 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:35,672 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:35,672 INFO L82 PathProgramCache]: Analyzing trace with hash -405620095, now seen corresponding path program 22 times [2018-09-26 21:45:35,673 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:35,673 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:35,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:35,673 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:35,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:35,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:36,357 INFO L134 CoverageAnalysis]: Checked inductivity of 21926 backedges. 0 proven. 20881 refuted. 0 times theorem prover too weak. 1045 trivial. 0 not checked. [2018-09-26 21:45:36,357 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:36,357 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:36,366 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:45:36,489 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:45:36,490 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:36,498 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:37,058 INFO L134 CoverageAnalysis]: Checked inductivity of 21926 backedges. 0 proven. 20881 refuted. 0 times theorem prover too weak. 1045 trivial. 0 not checked. [2018-09-26 21:45:37,081 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:37,081 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-26 21:45:37,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-26 21:45:37,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-26 21:45:37,082 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:37,082 INFO L87 Difference]: Start difference. First operand 232 states and 251 transitions. Second operand 22 states. [2018-09-26 21:45:37,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:37,350 INFO L93 Difference]: Finished difference Result 257 states and 278 transitions. [2018-09-26 21:45:37,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-26 21:45:37,357 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 231 [2018-09-26 21:45:37,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:37,358 INFO L225 Difference]: With dead ends: 257 [2018-09-26 21:45:37,358 INFO L226 Difference]: Without dead ends: 255 [2018-09-26 21:45:37,359 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:37,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2018-09-26 21:45:37,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 244. [2018-09-26 21:45:37,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2018-09-26 21:45:37,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 264 transitions. [2018-09-26 21:45:37,423 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 264 transitions. Word has length 231 [2018-09-26 21:45:37,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:37,423 INFO L480 AbstractCegarLoop]: Abstraction has 244 states and 264 transitions. [2018-09-26 21:45:37,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-26 21:45:37,423 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 264 transitions. [2018-09-26 21:45:37,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-09-26 21:45:37,425 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:37,425 INFO L375 BasicCegarLoop]: trace histogram [200, 20, 20, 1, 1, 1] [2018-09-26 21:45:37,425 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:37,425 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:37,425 INFO L82 PathProgramCache]: Analyzing trace with hash -241089333, now seen corresponding path program 23 times [2018-09-26 21:45:37,426 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:37,426 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:37,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:37,427 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:37,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:37,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:37,967 INFO L134 CoverageAnalysis]: Checked inductivity of 24300 backedges. 0 proven. 23200 refuted. 0 times theorem prover too weak. 1100 trivial. 0 not checked. [2018-09-26 21:45:37,967 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:37,967 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:37,975 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:45:38,266 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 121 check-sat command(s) [2018-09-26 21:45:38,266 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:38,271 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:38,739 INFO L134 CoverageAnalysis]: Checked inductivity of 24300 backedges. 0 proven. 23200 refuted. 0 times theorem prover too weak. 1100 trivial. 0 not checked. [2018-09-26 21:45:38,760 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:38,760 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-26 21:45:38,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-26 21:45:38,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-26 21:45:38,761 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:38,761 INFO L87 Difference]: Start difference. First operand 244 states and 264 transitions. Second operand 23 states. [2018-09-26 21:45:39,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:39,059 INFO L93 Difference]: Finished difference Result 269 states and 291 transitions. [2018-09-26 21:45:39,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-26 21:45:39,062 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 243 [2018-09-26 21:45:39,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:39,064 INFO L225 Difference]: With dead ends: 269 [2018-09-26 21:45:39,064 INFO L226 Difference]: Without dead ends: 267 [2018-09-26 21:45:39,064 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:39,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2018-09-26 21:45:39,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 256. [2018-09-26 21:45:39,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2018-09-26 21:45:39,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 277 transitions. [2018-09-26 21:45:39,123 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 277 transitions. Word has length 243 [2018-09-26 21:45:39,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:39,124 INFO L480 AbstractCegarLoop]: Abstraction has 256 states and 277 transitions. [2018-09-26 21:45:39,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-26 21:45:39,124 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 277 transitions. [2018-09-26 21:45:39,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2018-09-26 21:45:39,125 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:39,125 INFO L375 BasicCegarLoop]: trace histogram [210, 21, 21, 1, 1, 1] [2018-09-26 21:45:39,126 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:39,126 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:39,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1238413333, now seen corresponding path program 24 times [2018-09-26 21:45:39,126 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:39,126 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:39,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:39,127 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:39,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:39,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:39,440 INFO L134 CoverageAnalysis]: Checked inductivity of 26796 backedges. 0 proven. 25641 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2018-09-26 21:45:39,440 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:39,440 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:39,447 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:45:39,793 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 123 check-sat command(s) [2018-09-26 21:45:39,794 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:39,799 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:40,340 INFO L134 CoverageAnalysis]: Checked inductivity of 26796 backedges. 0 proven. 25641 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2018-09-26 21:45:40,362 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:40,363 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-26 21:45:40,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-26 21:45:40,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-26 21:45:40,364 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:40,364 INFO L87 Difference]: Start difference. First operand 256 states and 277 transitions. Second operand 24 states. [2018-09-26 21:45:42,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:42,070 INFO L93 Difference]: Finished difference Result 281 states and 304 transitions. [2018-09-26 21:45:42,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-26 21:45:42,070 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 255 [2018-09-26 21:45:42,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:42,072 INFO L225 Difference]: With dead ends: 281 [2018-09-26 21:45:42,072 INFO L226 Difference]: Without dead ends: 279 [2018-09-26 21:45:42,072 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:42,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2018-09-26 21:45:42,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 268. [2018-09-26 21:45:42,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2018-09-26 21:45:42,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 290 transitions. [2018-09-26 21:45:42,168 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 290 transitions. Word has length 255 [2018-09-26 21:45:42,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:42,169 INFO L480 AbstractCegarLoop]: Abstraction has 268 states and 290 transitions. [2018-09-26 21:45:42,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-26 21:45:42,169 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 290 transitions. [2018-09-26 21:45:42,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2018-09-26 21:45:42,170 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:42,170 INFO L375 BasicCegarLoop]: trace histogram [220, 22, 22, 1, 1, 1] [2018-09-26 21:45:42,171 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:42,171 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:42,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1994949537, now seen corresponding path program 25 times [2018-09-26 21:45:42,171 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:42,171 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:42,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:42,172 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:42,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:42,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:43,068 INFO L134 CoverageAnalysis]: Checked inductivity of 29414 backedges. 0 proven. 28204 refuted. 0 times theorem prover too weak. 1210 trivial. 0 not checked. [2018-09-26 21:45:43,068 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:43,069 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:43,076 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:45:43,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:43,232 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:45,224 INFO L134 CoverageAnalysis]: Checked inductivity of 29414 backedges. 0 proven. 28204 refuted. 0 times theorem prover too weak. 1210 trivial. 0 not checked. [2018-09-26 21:45:45,244 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:45,245 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-26 21:45:45,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-26 21:45:45,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-26 21:45:45,246 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:45,246 INFO L87 Difference]: Start difference. First operand 268 states and 290 transitions. Second operand 25 states. [2018-09-26 21:45:45,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:45,526 INFO L93 Difference]: Finished difference Result 293 states and 317 transitions. [2018-09-26 21:45:45,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-26 21:45:45,526 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 267 [2018-09-26 21:45:45,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:45,528 INFO L225 Difference]: With dead ends: 293 [2018-09-26 21:45:45,528 INFO L226 Difference]: Without dead ends: 291 [2018-09-26 21:45:45,528 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:45,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2018-09-26 21:45:45,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 280. [2018-09-26 21:45:45,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2018-09-26 21:45:45,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 303 transitions. [2018-09-26 21:45:45,623 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 303 transitions. Word has length 267 [2018-09-26 21:45:45,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:45,624 INFO L480 AbstractCegarLoop]: Abstraction has 280 states and 303 transitions. [2018-09-26 21:45:45,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-26 21:45:45,624 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 303 transitions. [2018-09-26 21:45:45,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2018-09-26 21:45:45,625 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:45,626 INFO L375 BasicCegarLoop]: trace histogram [230, 23, 23, 1, 1, 1] [2018-09-26 21:45:45,626 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:45,626 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:45,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1785473449, now seen corresponding path program 26 times [2018-09-26 21:45:45,626 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:45,627 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:45,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:45,627 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:45:45,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:45,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:46,531 INFO L134 CoverageAnalysis]: Checked inductivity of 32154 backedges. 0 proven. 30889 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2018-09-26 21:45:46,531 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:46,531 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:46,540 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:45:46,695 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:45:46,695 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:46,702 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:48,106 INFO L134 CoverageAnalysis]: Checked inductivity of 32154 backedges. 0 proven. 30889 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2018-09-26 21:45:48,148 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:48,148 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-26 21:45:48,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-26 21:45:48,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-26 21:45:48,149 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:48,149 INFO L87 Difference]: Start difference. First operand 280 states and 303 transitions. Second operand 26 states. [2018-09-26 21:45:48,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:48,735 INFO L93 Difference]: Finished difference Result 305 states and 330 transitions. [2018-09-26 21:45:48,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-26 21:45:48,742 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 279 [2018-09-26 21:45:48,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:48,744 INFO L225 Difference]: With dead ends: 305 [2018-09-26 21:45:48,744 INFO L226 Difference]: Without dead ends: 303 [2018-09-26 21:45:48,744 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:48,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2018-09-26 21:45:48,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 292. [2018-09-26 21:45:48,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2018-09-26 21:45:48,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 316 transitions. [2018-09-26 21:45:48,828 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 316 transitions. Word has length 279 [2018-09-26 21:45:48,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:48,828 INFO L480 AbstractCegarLoop]: Abstraction has 292 states and 316 transitions. [2018-09-26 21:45:48,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-26 21:45:48,828 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 316 transitions. [2018-09-26 21:45:48,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2018-09-26 21:45:48,830 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:48,830 INFO L375 BasicCegarLoop]: trace histogram [240, 24, 24, 1, 1, 1] [2018-09-26 21:45:48,830 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:48,830 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:48,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1795504115, now seen corresponding path program 27 times [2018-09-26 21:45:48,830 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:48,831 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:48,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:48,831 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:48,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:48,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:50,161 INFO L134 CoverageAnalysis]: Checked inductivity of 35016 backedges. 0 proven. 33696 refuted. 0 times theorem prover too weak. 1320 trivial. 0 not checked. [2018-09-26 21:45:50,162 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:50,162 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:50,170 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:45:50,741 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 145 check-sat command(s) [2018-09-26 21:45:50,741 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:50,750 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:51,405 INFO L134 CoverageAnalysis]: Checked inductivity of 35016 backedges. 0 proven. 33696 refuted. 0 times theorem prover too weak. 1320 trivial. 0 not checked. [2018-09-26 21:45:51,427 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:51,427 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-26 21:45:51,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-26 21:45:51,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-26 21:45:51,428 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:51,428 INFO L87 Difference]: Start difference. First operand 292 states and 316 transitions. Second operand 27 states. [2018-09-26 21:45:51,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:51,831 INFO L93 Difference]: Finished difference Result 317 states and 343 transitions. [2018-09-26 21:45:51,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-26 21:45:51,832 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 291 [2018-09-26 21:45:51,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:51,833 INFO L225 Difference]: With dead ends: 317 [2018-09-26 21:45:51,833 INFO L226 Difference]: Without dead ends: 315 [2018-09-26 21:45:51,834 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:51,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2018-09-26 21:45:51,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 304. [2018-09-26 21:45:51,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2018-09-26 21:45:51,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 329 transitions. [2018-09-26 21:45:51,952 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 329 transitions. Word has length 291 [2018-09-26 21:45:51,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:51,952 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 329 transitions. [2018-09-26 21:45:51,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-26 21:45:51,952 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 329 transitions. [2018-09-26 21:45:51,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2018-09-26 21:45:51,954 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:51,955 INFO L375 BasicCegarLoop]: trace histogram [250, 25, 25, 1, 1, 1] [2018-09-26 21:45:51,955 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:51,955 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:51,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1784227645, now seen corresponding path program 28 times [2018-09-26 21:45:51,955 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:51,955 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:51,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:51,956 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:51,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:51,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:53,225 INFO L134 CoverageAnalysis]: Checked inductivity of 38000 backedges. 0 proven. 36625 refuted. 0 times theorem prover too weak. 1375 trivial. 0 not checked. [2018-09-26 21:45:53,226 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:53,226 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:53,234 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:45:53,408 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:45:53,409 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:53,415 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:54,224 INFO L134 CoverageAnalysis]: Checked inductivity of 38000 backedges. 0 proven. 36625 refuted. 0 times theorem prover too weak. 1375 trivial. 0 not checked. [2018-09-26 21:45:54,245 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:54,246 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-26 21:45:54,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-26 21:45:54,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-26 21:45:54,246 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:54,246 INFO L87 Difference]: Start difference. First operand 304 states and 329 transitions. Second operand 28 states. [2018-09-26 21:45:54,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:54,648 INFO L93 Difference]: Finished difference Result 329 states and 356 transitions. [2018-09-26 21:45:54,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-26 21:45:54,648 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 303 [2018-09-26 21:45:54,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:54,650 INFO L225 Difference]: With dead ends: 329 [2018-09-26 21:45:54,650 INFO L226 Difference]: Without dead ends: 327 [2018-09-26 21:45:54,651 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:54,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2018-09-26 21:45:54,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 316. [2018-09-26 21:45:54,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2018-09-26 21:45:54,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 342 transitions. [2018-09-26 21:45:54,742 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 342 transitions. Word has length 303 [2018-09-26 21:45:54,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:54,743 INFO L480 AbstractCegarLoop]: Abstraction has 316 states and 342 transitions. [2018-09-26 21:45:54,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-26 21:45:54,743 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 342 transitions. [2018-09-26 21:45:54,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2018-09-26 21:45:54,744 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:54,745 INFO L375 BasicCegarLoop]: trace histogram [260, 26, 26, 1, 1, 1] [2018-09-26 21:45:54,745 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:54,745 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:54,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1243510663, now seen corresponding path program 29 times [2018-09-26 21:45:54,745 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:54,745 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:54,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:54,746 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:54,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:54,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:55,570 INFO L134 CoverageAnalysis]: Checked inductivity of 41106 backedges. 0 proven. 39676 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2018-09-26 21:45:55,570 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:55,570 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:55,578 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:45:56,009 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 157 check-sat command(s) [2018-09-26 21:45:56,009 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:56,015 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:56,756 INFO L134 CoverageAnalysis]: Checked inductivity of 41106 backedges. 0 proven. 39676 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2018-09-26 21:45:56,777 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:56,778 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-26 21:45:56,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-26 21:45:56,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-26 21:45:56,779 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:56,779 INFO L87 Difference]: Start difference. First operand 316 states and 342 transitions. Second operand 29 states. [2018-09-26 21:45:57,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:57,278 INFO L93 Difference]: Finished difference Result 341 states and 369 transitions. [2018-09-26 21:45:57,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-26 21:45:57,278 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 315 [2018-09-26 21:45:57,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:57,280 INFO L225 Difference]: With dead ends: 341 [2018-09-26 21:45:57,280 INFO L226 Difference]: Without dead ends: 339 [2018-09-26 21:45:57,280 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:57,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2018-09-26 21:45:57,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 328. [2018-09-26 21:45:57,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2018-09-26 21:45:57,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 355 transitions. [2018-09-26 21:45:57,377 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 355 transitions. Word has length 315 [2018-09-26 21:45:57,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:57,377 INFO L480 AbstractCegarLoop]: Abstraction has 328 states and 355 transitions. [2018-09-26 21:45:57,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-26 21:45:57,377 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 355 transitions. [2018-09-26 21:45:57,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2018-09-26 21:45:57,379 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:57,379 INFO L375 BasicCegarLoop]: trace histogram [270, 27, 27, 1, 1, 1] [2018-09-26 21:45:57,379 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:57,379 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:57,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1907644207, now seen corresponding path program 30 times [2018-09-26 21:45:57,380 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:57,380 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:57,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:57,380 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:57,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:57,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:58,247 INFO L134 CoverageAnalysis]: Checked inductivity of 44334 backedges. 0 proven. 42849 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2018-09-26 21:45:58,247 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:58,247 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:58,254 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:45:58,708 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 158 check-sat command(s) [2018-09-26 21:45:58,708 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:58,715 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:59,687 INFO L134 CoverageAnalysis]: Checked inductivity of 44334 backedges. 0 proven. 42849 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2018-09-26 21:45:59,708 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:59,708 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-26 21:45:59,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-26 21:45:59,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-26 21:45:59,709 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:59,709 INFO L87 Difference]: Start difference. First operand 328 states and 355 transitions. Second operand 30 states. [2018-09-26 21:46:00,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:00,156 INFO L93 Difference]: Finished difference Result 353 states and 382 transitions. [2018-09-26 21:46:00,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-26 21:46:00,156 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 327 [2018-09-26 21:46:00,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:00,158 INFO L225 Difference]: With dead ends: 353 [2018-09-26 21:46:00,158 INFO L226 Difference]: Without dead ends: 351 [2018-09-26 21:46:00,158 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:00,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2018-09-26 21:46:00,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 340. [2018-09-26 21:46:00,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2018-09-26 21:46:00,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 368 transitions. [2018-09-26 21:46:00,271 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 368 transitions. Word has length 327 [2018-09-26 21:46:00,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:00,272 INFO L480 AbstractCegarLoop]: Abstraction has 340 states and 368 transitions. [2018-09-26 21:46:00,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-26 21:46:00,272 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 368 transitions. [2018-09-26 21:46:00,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2018-09-26 21:46:00,273 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:00,273 INFO L375 BasicCegarLoop]: trace histogram [280, 28, 28, 1, 1, 1] [2018-09-26 21:46:00,273 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:00,273 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:00,274 INFO L82 PathProgramCache]: Analyzing trace with hash -48809189, now seen corresponding path program 31 times [2018-09-26 21:46:00,274 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:00,274 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:00,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:00,275 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:00,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:00,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:00,903 INFO L134 CoverageAnalysis]: Checked inductivity of 47684 backedges. 0 proven. 46144 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2018-09-26 21:46:00,904 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:00,904 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:00,912 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:46:01,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:01,127 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:01,991 INFO L134 CoverageAnalysis]: Checked inductivity of 47684 backedges. 0 proven. 46144 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2018-09-26 21:46:02,012 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:02,012 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-26 21:46:02,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-26 21:46:02,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-26 21:46:02,013 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:02,013 INFO L87 Difference]: Start difference. First operand 340 states and 368 transitions. Second operand 31 states. [2018-09-26 21:46:02,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:02,565 INFO L93 Difference]: Finished difference Result 365 states and 395 transitions. [2018-09-26 21:46:02,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-26 21:46:02,566 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 339 [2018-09-26 21:46:02,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:02,567 INFO L225 Difference]: With dead ends: 365 [2018-09-26 21:46:02,568 INFO L226 Difference]: Without dead ends: 363 [2018-09-26 21:46:02,568 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:02,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2018-09-26 21:46:02,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 352. [2018-09-26 21:46:02,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2018-09-26 21:46:02,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 381 transitions. [2018-09-26 21:46:02,690 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 381 transitions. Word has length 339 [2018-09-26 21:46:02,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:02,691 INFO L480 AbstractCegarLoop]: Abstraction has 352 states and 381 transitions. [2018-09-26 21:46:02,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-26 21:46:02,691 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 381 transitions. [2018-09-26 21:46:02,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2018-09-26 21:46:02,693 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:02,693 INFO L375 BasicCegarLoop]: trace histogram [290, 29, 29, 1, 1, 1] [2018-09-26 21:46:02,694 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:02,694 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:02,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1056419429, now seen corresponding path program 32 times [2018-09-26 21:46:02,694 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:02,694 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:02,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:02,695 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:46:02,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:02,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:03,691 INFO L134 CoverageAnalysis]: Checked inductivity of 51156 backedges. 0 proven. 49561 refuted. 0 times theorem prover too weak. 1595 trivial. 0 not checked. [2018-09-26 21:46:03,692 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:03,692 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:03,700 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:46:03,894 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:46:03,894 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:03,900 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:04,720 INFO L134 CoverageAnalysis]: Checked inductivity of 51156 backedges. 0 proven. 49561 refuted. 0 times theorem prover too weak. 1595 trivial. 0 not checked. [2018-09-26 21:46:04,741 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:04,742 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-26 21:46:04,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-26 21:46:04,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-26 21:46:04,743 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:04,743 INFO L87 Difference]: Start difference. First operand 352 states and 381 transitions. Second operand 32 states. [2018-09-26 21:46:05,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:05,194 INFO L93 Difference]: Finished difference Result 377 states and 408 transitions. [2018-09-26 21:46:05,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-26 21:46:05,195 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 351 [2018-09-26 21:46:05,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:05,196 INFO L225 Difference]: With dead ends: 377 [2018-09-26 21:46:05,196 INFO L226 Difference]: Without dead ends: 375 [2018-09-26 21:46:05,197 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 351 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:05,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2018-09-26 21:46:05,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 364. [2018-09-26 21:46:05,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2018-09-26 21:46:05,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 394 transitions. [2018-09-26 21:46:05,314 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 394 transitions. Word has length 351 [2018-09-26 21:46:05,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:05,314 INFO L480 AbstractCegarLoop]: Abstraction has 364 states and 394 transitions. [2018-09-26 21:46:05,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-26 21:46:05,314 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 394 transitions. [2018-09-26 21:46:05,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2018-09-26 21:46:05,316 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:05,316 INFO L375 BasicCegarLoop]: trace histogram [300, 30, 30, 1, 1, 1] [2018-09-26 21:46:05,317 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:05,317 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:05,317 INFO L82 PathProgramCache]: Analyzing trace with hash 2124645039, now seen corresponding path program 33 times [2018-09-26 21:46:05,317 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:05,317 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:05,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:05,318 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:05,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:05,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:05,800 INFO L134 CoverageAnalysis]: Checked inductivity of 54750 backedges. 0 proven. 53100 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2018-09-26 21:46:05,800 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:05,800 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:05,809 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:46:06,375 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 181 check-sat command(s) [2018-09-26 21:46:06,375 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:06,384 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:07,414 INFO L134 CoverageAnalysis]: Checked inductivity of 54750 backedges. 0 proven. 53100 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2018-09-26 21:46:07,436 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:07,436 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-26 21:46:07,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-26 21:46:07,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-26 21:46:07,437 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:07,437 INFO L87 Difference]: Start difference. First operand 364 states and 394 transitions. Second operand 33 states. [2018-09-26 21:46:07,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:07,901 INFO L93 Difference]: Finished difference Result 389 states and 421 transitions. [2018-09-26 21:46:07,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-26 21:46:07,902 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 363 [2018-09-26 21:46:07,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:07,904 INFO L225 Difference]: With dead ends: 389 [2018-09-26 21:46:07,904 INFO L226 Difference]: Without dead ends: 387 [2018-09-26 21:46:07,904 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:07,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2018-09-26 21:46:08,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 376. [2018-09-26 21:46:08,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2018-09-26 21:46:08,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 407 transitions. [2018-09-26 21:46:08,033 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 407 transitions. Word has length 363 [2018-09-26 21:46:08,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:08,033 INFO L480 AbstractCegarLoop]: Abstraction has 376 states and 407 transitions. [2018-09-26 21:46:08,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-26 21:46:08,033 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 407 transitions. [2018-09-26 21:46:08,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2018-09-26 21:46:08,035 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:08,036 INFO L375 BasicCegarLoop]: trace histogram [310, 31, 31, 1, 1, 1] [2018-09-26 21:46:08,036 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:08,036 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:08,036 INFO L82 PathProgramCache]: Analyzing trace with hash 152123385, now seen corresponding path program 34 times [2018-09-26 21:46:08,037 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:08,037 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:08,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:08,037 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:08,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:08,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:08,665 INFO L134 CoverageAnalysis]: Checked inductivity of 58466 backedges. 0 proven. 56761 refuted. 0 times theorem prover too weak. 1705 trivial. 0 not checked. [2018-09-26 21:46:08,665 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:08,665 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:08,674 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:46:08,883 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:46:08,884 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:08,890 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:09,736 INFO L134 CoverageAnalysis]: Checked inductivity of 58466 backedges. 0 proven. 56761 refuted. 0 times theorem prover too weak. 1705 trivial. 0 not checked. [2018-09-26 21:46:09,757 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:09,757 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-26 21:46:09,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-26 21:46:09,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-26 21:46:09,758 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:09,758 INFO L87 Difference]: Start difference. First operand 376 states and 407 transitions. Second operand 34 states. [2018-09-26 21:46:10,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:10,314 INFO L93 Difference]: Finished difference Result 401 states and 434 transitions. [2018-09-26 21:46:10,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-26 21:46:10,314 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 375 [2018-09-26 21:46:10,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:10,316 INFO L225 Difference]: With dead ends: 401 [2018-09-26 21:46:10,316 INFO L226 Difference]: Without dead ends: 399 [2018-09-26 21:46:10,317 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 375 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:10,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2018-09-26 21:46:10,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 388. [2018-09-26 21:46:10,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2018-09-26 21:46:10,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 420 transitions. [2018-09-26 21:46:10,450 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 420 transitions. Word has length 375 [2018-09-26 21:46:10,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:10,451 INFO L480 AbstractCegarLoop]: Abstraction has 388 states and 420 transitions. [2018-09-26 21:46:10,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-26 21:46:10,451 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 420 transitions. [2018-09-26 21:46:10,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2018-09-26 21:46:10,453 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:10,453 INFO L375 BasicCegarLoop]: trace histogram [320, 32, 32, 1, 1, 1] [2018-09-26 21:46:10,453 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:10,453 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:10,453 INFO L82 PathProgramCache]: Analyzing trace with hash -310948285, now seen corresponding path program 35 times [2018-09-26 21:46:10,453 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:10,453 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:10,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:10,454 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:10,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:10,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:11,173 INFO L134 CoverageAnalysis]: Checked inductivity of 62304 backedges. 0 proven. 60544 refuted. 0 times theorem prover too weak. 1760 trivial. 0 not checked. [2018-09-26 21:46:11,173 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:11,174 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:11,181 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:46:11,820 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 193 check-sat command(s) [2018-09-26 21:46:11,821 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:11,828 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:12,707 INFO L134 CoverageAnalysis]: Checked inductivity of 62304 backedges. 0 proven. 60544 refuted. 0 times theorem prover too weak. 1760 trivial. 0 not checked. [2018-09-26 21:46:12,729 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:12,729 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-26 21:46:12,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-26 21:46:12,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-26 21:46:12,730 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:12,730 INFO L87 Difference]: Start difference. First operand 388 states and 420 transitions. Second operand 35 states. [2018-09-26 21:46:13,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:13,397 INFO L93 Difference]: Finished difference Result 413 states and 447 transitions. [2018-09-26 21:46:13,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-26 21:46:13,398 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 387 [2018-09-26 21:46:13,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:13,399 INFO L225 Difference]: With dead ends: 413 [2018-09-26 21:46:13,400 INFO L226 Difference]: Without dead ends: 411 [2018-09-26 21:46:13,400 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 387 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:13,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2018-09-26 21:46:13,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 400. [2018-09-26 21:46:13,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2018-09-26 21:46:13,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 433 transitions. [2018-09-26 21:46:13,546 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 433 transitions. Word has length 387 [2018-09-26 21:46:13,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:13,547 INFO L480 AbstractCegarLoop]: Abstraction has 400 states and 433 transitions. [2018-09-26 21:46:13,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-26 21:46:13,547 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 433 transitions. [2018-09-26 21:46:13,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2018-09-26 21:46:13,549 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:13,549 INFO L375 BasicCegarLoop]: trace histogram [330, 33, 33, 1, 1, 1] [2018-09-26 21:46:13,550 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:13,550 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:13,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1655945843, now seen corresponding path program 36 times [2018-09-26 21:46:13,550 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:13,550 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:13,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:13,551 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:13,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:13,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:15,279 INFO L134 CoverageAnalysis]: Checked inductivity of 66264 backedges. 0 proven. 64449 refuted. 0 times theorem prover too weak. 1815 trivial. 0 not checked. [2018-09-26 21:46:15,279 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:15,279 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:15,286 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:46:15,931 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 195 check-sat command(s) [2018-09-26 21:46:15,931 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:15,939 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:16,932 INFO L134 CoverageAnalysis]: Checked inductivity of 66264 backedges. 0 proven. 64449 refuted. 0 times theorem prover too weak. 1815 trivial. 0 not checked. [2018-09-26 21:46:16,953 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:16,953 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-26 21:46:16,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-26 21:46:16,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-26 21:46:16,954 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:16,955 INFO L87 Difference]: Start difference. First operand 400 states and 433 transitions. Second operand 36 states. [2018-09-26 21:46:17,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:17,558 INFO L93 Difference]: Finished difference Result 425 states and 460 transitions. [2018-09-26 21:46:17,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-26 21:46:17,558 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 399 [2018-09-26 21:46:17,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:17,560 INFO L225 Difference]: With dead ends: 425 [2018-09-26 21:46:17,560 INFO L226 Difference]: Without dead ends: 423 [2018-09-26 21:46:17,560 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 399 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:17,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2018-09-26 21:46:17,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 412. [2018-09-26 21:46:17,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2018-09-26 21:46:17,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 446 transitions. [2018-09-26 21:46:17,710 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 446 transitions. Word has length 399 [2018-09-26 21:46:17,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:17,711 INFO L480 AbstractCegarLoop]: Abstraction has 412 states and 446 transitions. [2018-09-26 21:46:17,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-26 21:46:17,711 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 446 transitions. [2018-09-26 21:46:17,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2018-09-26 21:46:17,713 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:17,713 INFO L375 BasicCegarLoop]: trace histogram [340, 34, 34, 1, 1, 1] [2018-09-26 21:46:17,713 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:17,713 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:17,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1941529129, now seen corresponding path program 37 times [2018-09-26 21:46:17,713 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:17,714 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:17,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:17,714 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:17,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:17,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:18,707 INFO L134 CoverageAnalysis]: Checked inductivity of 70346 backedges. 0 proven. 68476 refuted. 0 times theorem prover too weak. 1870 trivial. 0 not checked. [2018-09-26 21:46:18,707 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:18,707 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:18,715 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:46:18,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:18,941 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:19,954 INFO L134 CoverageAnalysis]: Checked inductivity of 70346 backedges. 0 proven. 68476 refuted. 0 times theorem prover too weak. 1870 trivial. 0 not checked. [2018-09-26 21:46:19,975 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:19,976 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-26 21:46:19,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-26 21:46:19,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-26 21:46:19,977 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:19,977 INFO L87 Difference]: Start difference. First operand 412 states and 446 transitions. Second operand 37 states. [2018-09-26 21:46:20,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:20,767 INFO L93 Difference]: Finished difference Result 437 states and 473 transitions. [2018-09-26 21:46:20,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-26 21:46:20,768 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 411 [2018-09-26 21:46:20,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:20,769 INFO L225 Difference]: With dead ends: 437 [2018-09-26 21:46:20,769 INFO L226 Difference]: Without dead ends: 435 [2018-09-26 21:46:20,770 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:20,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2018-09-26 21:46:20,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 424. [2018-09-26 21:46:20,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 424 states. [2018-09-26 21:46:20,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 459 transitions. [2018-09-26 21:46:20,932 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 459 transitions. Word has length 411 [2018-09-26 21:46:20,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:20,933 INFO L480 AbstractCegarLoop]: Abstraction has 424 states and 459 transitions. [2018-09-26 21:46:20,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-26 21:46:20,933 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 459 transitions. [2018-09-26 21:46:20,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2018-09-26 21:46:20,936 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:20,936 INFO L375 BasicCegarLoop]: trace histogram [350, 35, 35, 1, 1, 1] [2018-09-26 21:46:20,936 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:20,936 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:20,936 INFO L82 PathProgramCache]: Analyzing trace with hash -799221983, now seen corresponding path program 38 times [2018-09-26 21:46:20,937 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:20,937 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:20,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:20,937 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:46:20,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:20,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:21,562 INFO L134 CoverageAnalysis]: Checked inductivity of 74550 backedges. 0 proven. 72625 refuted. 0 times theorem prover too weak. 1925 trivial. 0 not checked. [2018-09-26 21:46:21,562 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:21,562 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:21,570 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:46:21,792 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:46:21,792 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:21,799 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:24,109 INFO L134 CoverageAnalysis]: Checked inductivity of 74550 backedges. 0 proven. 72625 refuted. 0 times theorem prover too weak. 1925 trivial. 0 not checked. [2018-09-26 21:46:24,130 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:24,130 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-26 21:46:24,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-26 21:46:24,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-26 21:46:24,131 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:24,132 INFO L87 Difference]: Start difference. First operand 424 states and 459 transitions. Second operand 38 states. [2018-09-26 21:46:24,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:24,790 INFO L93 Difference]: Finished difference Result 449 states and 486 transitions. [2018-09-26 21:46:24,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-26 21:46:24,790 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 423 [2018-09-26 21:46:24,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:24,792 INFO L225 Difference]: With dead ends: 449 [2018-09-26 21:46:24,792 INFO L226 Difference]: Without dead ends: 447 [2018-09-26 21:46:24,792 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 423 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:24,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2018-09-26 21:46:24,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 436. [2018-09-26 21:46:24,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 436 states. [2018-09-26 21:46:24,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 472 transitions. [2018-09-26 21:46:24,960 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 472 transitions. Word has length 423 [2018-09-26 21:46:24,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:24,960 INFO L480 AbstractCegarLoop]: Abstraction has 436 states and 472 transitions. [2018-09-26 21:46:24,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-26 21:46:24,960 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 472 transitions. [2018-09-26 21:46:24,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2018-09-26 21:46:24,963 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:24,963 INFO L375 BasicCegarLoop]: trace histogram [360, 36, 36, 1, 1, 1] [2018-09-26 21:46:24,963 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:24,963 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:24,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1044024981, now seen corresponding path program 39 times [2018-09-26 21:46:24,964 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:24,964 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:24,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:24,965 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:24,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:25,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:25,679 INFO L134 CoverageAnalysis]: Checked inductivity of 78876 backedges. 0 proven. 76896 refuted. 0 times theorem prover too weak. 1980 trivial. 0 not checked. [2018-09-26 21:46:25,680 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:25,680 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:25,688 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:46:26,448 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 217 check-sat command(s) [2018-09-26 21:46:26,449 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:26,456 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:27,562 INFO L134 CoverageAnalysis]: Checked inductivity of 78876 backedges. 0 proven. 76896 refuted. 0 times theorem prover too weak. 1980 trivial. 0 not checked. [2018-09-26 21:46:27,584 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:27,584 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-26 21:46:27,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-26 21:46:27,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-26 21:46:27,585 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:27,585 INFO L87 Difference]: Start difference. First operand 436 states and 472 transitions. Second operand 39 states. [2018-09-26 21:46:28,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:28,220 INFO L93 Difference]: Finished difference Result 461 states and 499 transitions. [2018-09-26 21:46:28,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-26 21:46:28,220 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 435 [2018-09-26 21:46:28,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:28,222 INFO L225 Difference]: With dead ends: 461 [2018-09-26 21:46:28,222 INFO L226 Difference]: Without dead ends: 459 [2018-09-26 21:46:28,222 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 435 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:28,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2018-09-26 21:46:28,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 448. [2018-09-26 21:46:28,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2018-09-26 21:46:28,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 485 transitions. [2018-09-26 21:46:28,383 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 485 transitions. Word has length 435 [2018-09-26 21:46:28,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:28,383 INFO L480 AbstractCegarLoop]: Abstraction has 448 states and 485 transitions. [2018-09-26 21:46:28,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-26 21:46:28,384 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 485 transitions. [2018-09-26 21:46:28,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2018-09-26 21:46:28,385 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:28,385 INFO L375 BasicCegarLoop]: trace histogram [370, 37, 37, 1, 1, 1] [2018-09-26 21:46:28,386 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:28,386 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:28,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1695093579, now seen corresponding path program 40 times [2018-09-26 21:46:28,386 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:28,386 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:28,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:28,387 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:28,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:28,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:29,404 INFO L134 CoverageAnalysis]: Checked inductivity of 83324 backedges. 0 proven. 81289 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2018-09-26 21:46:29,404 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:29,405 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:29,413 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:46:29,659 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:46:29,659 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:29,667 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:30,788 INFO L134 CoverageAnalysis]: Checked inductivity of 83324 backedges. 0 proven. 81289 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2018-09-26 21:46:30,809 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:30,809 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-26 21:46:30,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-26 21:46:30,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-26 21:46:30,810 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:30,810 INFO L87 Difference]: Start difference. First operand 448 states and 485 transitions. Second operand 40 states. [2018-09-26 21:46:31,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:31,478 INFO L93 Difference]: Finished difference Result 473 states and 512 transitions. [2018-09-26 21:46:31,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-26 21:46:31,479 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 447 [2018-09-26 21:46:31,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:31,481 INFO L225 Difference]: With dead ends: 473 [2018-09-26 21:46:31,481 INFO L226 Difference]: Without dead ends: 471 [2018-09-26 21:46:31,481 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 447 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:31,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2018-09-26 21:46:31,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 460. [2018-09-26 21:46:31,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460 states. [2018-09-26 21:46:31,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 498 transitions. [2018-09-26 21:46:31,690 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 498 transitions. Word has length 447 [2018-09-26 21:46:31,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:31,690 INFO L480 AbstractCegarLoop]: Abstraction has 460 states and 498 transitions. [2018-09-26 21:46:31,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-26 21:46:31,690 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 498 transitions. [2018-09-26 21:46:31,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2018-09-26 21:46:31,693 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:31,693 INFO L375 BasicCegarLoop]: trace histogram [380, 38, 38, 1, 1, 1] [2018-09-26 21:46:31,693 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:31,693 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:31,694 INFO L82 PathProgramCache]: Analyzing trace with hash 413649151, now seen corresponding path program 41 times [2018-09-26 21:46:31,694 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:31,694 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:31,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:31,695 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:31,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:31,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:32,490 INFO L134 CoverageAnalysis]: Checked inductivity of 87894 backedges. 0 proven. 85804 refuted. 0 times theorem prover too weak. 2090 trivial. 0 not checked. [2018-09-26 21:46:32,490 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:32,490 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:32,498 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:46:33,328 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 229 check-sat command(s) [2018-09-26 21:46:33,328 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:33,337 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:34,684 INFO L134 CoverageAnalysis]: Checked inductivity of 87894 backedges. 0 proven. 85804 refuted. 0 times theorem prover too weak. 2090 trivial. 0 not checked. [2018-09-26 21:46:34,707 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:34,707 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-26 21:46:34,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-26 21:46:34,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-26 21:46:34,709 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:34,709 INFO L87 Difference]: Start difference. First operand 460 states and 498 transitions. Second operand 41 states. [2018-09-26 21:46:35,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:35,574 INFO L93 Difference]: Finished difference Result 485 states and 525 transitions. [2018-09-26 21:46:35,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-26 21:46:35,574 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 459 [2018-09-26 21:46:35,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:35,576 INFO L225 Difference]: With dead ends: 485 [2018-09-26 21:46:35,576 INFO L226 Difference]: Without dead ends: 483 [2018-09-26 21:46:35,576 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 459 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:35,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2018-09-26 21:46:35,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 472. [2018-09-26 21:46:35,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 472 states. [2018-09-26 21:46:35,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 511 transitions. [2018-09-26 21:46:35,785 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 511 transitions. Word has length 459 [2018-09-26 21:46:35,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:35,785 INFO L480 AbstractCegarLoop]: Abstraction has 472 states and 511 transitions. [2018-09-26 21:46:35,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-26 21:46:35,785 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 511 transitions. [2018-09-26 21:46:35,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2018-09-26 21:46:35,787 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:35,787 INFO L375 BasicCegarLoop]: trace histogram [390, 39, 39, 1, 1, 1] [2018-09-26 21:46:35,788 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:35,788 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:35,788 INFO L82 PathProgramCache]: Analyzing trace with hash 432965193, now seen corresponding path program 42 times [2018-09-26 21:46:35,788 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:35,788 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:35,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:35,789 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:35,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:35,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:36,440 INFO L134 CoverageAnalysis]: Checked inductivity of 92586 backedges. 0 proven. 90441 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2018-09-26 21:46:36,440 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:36,440 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:36,450 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:46:37,308 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 230 check-sat command(s) [2018-09-26 21:46:37,308 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:37,316 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:38,500 INFO L134 CoverageAnalysis]: Checked inductivity of 92586 backedges. 0 proven. 90441 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2018-09-26 21:46:38,521 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:38,521 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-26 21:46:38,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-26 21:46:38,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-26 21:46:38,522 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:38,522 INFO L87 Difference]: Start difference. First operand 472 states and 511 transitions. Second operand 42 states. [2018-09-26 21:46:39,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:39,270 INFO L93 Difference]: Finished difference Result 497 states and 538 transitions. [2018-09-26 21:46:39,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-26 21:46:39,271 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 471 [2018-09-26 21:46:39,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:39,272 INFO L225 Difference]: With dead ends: 497 [2018-09-26 21:46:39,273 INFO L226 Difference]: Without dead ends: 495 [2018-09-26 21:46:39,273 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 471 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:39,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2018-09-26 21:46:39,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 484. [2018-09-26 21:46:39,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 484 states. [2018-09-26 21:46:39,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 524 transitions. [2018-09-26 21:46:39,481 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 524 transitions. Word has length 471 [2018-09-26 21:46:39,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:39,481 INFO L480 AbstractCegarLoop]: Abstraction has 484 states and 524 transitions. [2018-09-26 21:46:39,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-26 21:46:39,481 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 524 transitions. [2018-09-26 21:46:39,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2018-09-26 21:46:39,483 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:39,483 INFO L375 BasicCegarLoop]: trace histogram [400, 40, 40, 1, 1, 1] [2018-09-26 21:46:39,483 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:39,483 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:39,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1067558035, now seen corresponding path program 43 times [2018-09-26 21:46:39,484 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:39,484 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:39,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:39,485 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:39,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:39,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:40,138 INFO L134 CoverageAnalysis]: Checked inductivity of 97400 backedges. 0 proven. 95200 refuted. 0 times theorem prover too weak. 2200 trivial. 0 not checked. [2018-09-26 21:46:40,138 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:40,138 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:40,145 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:46:40,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:40,415 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:41,689 INFO L134 CoverageAnalysis]: Checked inductivity of 97400 backedges. 0 proven. 95200 refuted. 0 times theorem prover too weak. 2200 trivial. 0 not checked. [2018-09-26 21:46:41,710 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:41,710 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-26 21:46:41,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-26 21:46:41,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-26 21:46:41,711 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:41,711 INFO L87 Difference]: Start difference. First operand 484 states and 524 transitions. Second operand 43 states. [2018-09-26 21:46:42,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:42,464 INFO L93 Difference]: Finished difference Result 509 states and 551 transitions. [2018-09-26 21:46:42,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-26 21:46:42,464 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 483 [2018-09-26 21:46:42,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:42,466 INFO L225 Difference]: With dead ends: 509 [2018-09-26 21:46:42,466 INFO L226 Difference]: Without dead ends: 507 [2018-09-26 21:46:42,466 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 483 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:42,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2018-09-26 21:46:42,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 496. [2018-09-26 21:46:42,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 496 states. [2018-09-26 21:46:42,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 537 transitions. [2018-09-26 21:46:42,682 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 537 transitions. Word has length 483 [2018-09-26 21:46:42,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:42,682 INFO L480 AbstractCegarLoop]: Abstraction has 496 states and 537 transitions. [2018-09-26 21:46:42,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-26 21:46:42,682 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 537 transitions. [2018-09-26 21:46:42,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2018-09-26 21:46:42,684 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:42,684 INFO L375 BasicCegarLoop]: trace histogram [410, 41, 41, 1, 1, 1] [2018-09-26 21:46:42,684 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:42,684 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:42,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1919441955, now seen corresponding path program 44 times [2018-09-26 21:46:42,684 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:42,685 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:42,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:42,685 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:46:42,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:42,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:43,383 INFO L134 CoverageAnalysis]: Checked inductivity of 102336 backedges. 0 proven. 100081 refuted. 0 times theorem prover too weak. 2255 trivial. 0 not checked. [2018-09-26 21:46:43,383 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:43,383 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:43,390 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:46:43,651 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:46:43,652 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:43,660 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:45,206 INFO L134 CoverageAnalysis]: Checked inductivity of 102336 backedges. 0 proven. 100081 refuted. 0 times theorem prover too weak. 2255 trivial. 0 not checked. [2018-09-26 21:46:45,227 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:45,227 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-26 21:46:45,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-26 21:46:45,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-26 21:46:45,228 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:45,228 INFO L87 Difference]: Start difference. First operand 496 states and 537 transitions. Second operand 44 states. [2018-09-26 21:46:45,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:45,990 INFO L93 Difference]: Finished difference Result 521 states and 564 transitions. [2018-09-26 21:46:45,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-26 21:46:45,990 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 495 [2018-09-26 21:46:45,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:45,992 INFO L225 Difference]: With dead ends: 521 [2018-09-26 21:46:45,992 INFO L226 Difference]: Without dead ends: 519 [2018-09-26 21:46:45,993 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 495 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:45,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2018-09-26 21:46:46,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 508. [2018-09-26 21:46:46,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 508 states. [2018-09-26 21:46:46,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 550 transitions. [2018-09-26 21:46:46,216 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 550 transitions. Word has length 495 [2018-09-26 21:46:46,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:46,216 INFO L480 AbstractCegarLoop]: Abstraction has 508 states and 550 transitions. [2018-09-26 21:46:46,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-26 21:46:46,216 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 550 transitions. [2018-09-26 21:46:46,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2018-09-26 21:46:46,218 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:46,218 INFO L375 BasicCegarLoop]: trace histogram [420, 42, 42, 1, 1, 1] [2018-09-26 21:46:46,218 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:46,219 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:46,219 INFO L82 PathProgramCache]: Analyzing trace with hash 157746215, now seen corresponding path program 45 times [2018-09-26 21:46:46,219 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:46,219 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:46,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:46,219 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:46,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:46,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:46,917 INFO L134 CoverageAnalysis]: Checked inductivity of 107394 backedges. 0 proven. 105084 refuted. 0 times theorem prover too weak. 2310 trivial. 0 not checked. [2018-09-26 21:46:46,917 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:46,918 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:46,927 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:46:48,063 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 253 check-sat command(s) [2018-09-26 21:46:48,063 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:48,072 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:49,513 INFO L134 CoverageAnalysis]: Checked inductivity of 107394 backedges. 0 proven. 105084 refuted. 0 times theorem prover too weak. 2310 trivial. 0 not checked. [2018-09-26 21:46:49,535 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:49,535 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-26 21:46:49,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-26 21:46:49,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-26 21:46:49,536 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:49,536 INFO L87 Difference]: Start difference. First operand 508 states and 550 transitions. Second operand 45 states. [2018-09-26 21:46:50,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:50,515 INFO L93 Difference]: Finished difference Result 533 states and 577 transitions. [2018-09-26 21:46:50,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-26 21:46:50,518 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 507 [2018-09-26 21:46:50,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:50,520 INFO L225 Difference]: With dead ends: 533 [2018-09-26 21:46:50,520 INFO L226 Difference]: Without dead ends: 531 [2018-09-26 21:46:50,520 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 550 GetRequests, 507 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:50,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2018-09-26 21:46:50,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 520. [2018-09-26 21:46:50,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 520 states. [2018-09-26 21:46:50,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 563 transitions. [2018-09-26 21:46:50,795 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 563 transitions. Word has length 507 [2018-09-26 21:46:50,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:50,796 INFO L480 AbstractCegarLoop]: Abstraction has 520 states and 563 transitions. [2018-09-26 21:46:50,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-26 21:46:50,796 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 563 transitions. [2018-09-26 21:46:50,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 520 [2018-09-26 21:46:50,798 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:50,798 INFO L375 BasicCegarLoop]: trace histogram [430, 43, 43, 1, 1, 1] [2018-09-26 21:46:50,799 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:50,799 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:50,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1527137649, now seen corresponding path program 46 times [2018-09-26 21:46:50,799 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:50,799 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:50,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:50,800 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:50,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:50,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:51,576 INFO L134 CoverageAnalysis]: Checked inductivity of 112574 backedges. 0 proven. 110209 refuted. 0 times theorem prover too weak. 2365 trivial. 0 not checked. [2018-09-26 21:46:51,576 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:51,576 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:51,583 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:46:51,857 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:46:51,857 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:51,865 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:53,316 INFO L134 CoverageAnalysis]: Checked inductivity of 112574 backedges. 0 proven. 110209 refuted. 0 times theorem prover too weak. 2365 trivial. 0 not checked. [2018-09-26 21:46:53,337 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:53,337 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-26 21:46:53,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-26 21:46:53,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-26 21:46:53,338 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:53,338 INFO L87 Difference]: Start difference. First operand 520 states and 563 transitions. Second operand 46 states. [2018-09-26 21:46:54,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:54,420 INFO L93 Difference]: Finished difference Result 545 states and 590 transitions. [2018-09-26 21:46:54,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-26 21:46:54,427 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 519 [2018-09-26 21:46:54,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:54,429 INFO L225 Difference]: With dead ends: 545 [2018-09-26 21:46:54,429 INFO L226 Difference]: Without dead ends: 543 [2018-09-26 21:46:54,429 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 519 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:54,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2018-09-26 21:46:54,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 532. [2018-09-26 21:46:54,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 532 states. [2018-09-26 21:46:54,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 576 transitions. [2018-09-26 21:46:54,726 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 576 transitions. Word has length 519 [2018-09-26 21:46:54,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:54,727 INFO L480 AbstractCegarLoop]: Abstraction has 532 states and 576 transitions. [2018-09-26 21:46:54,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-26 21:46:54,727 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 576 transitions. [2018-09-26 21:46:54,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2018-09-26 21:46:54,729 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:54,729 INFO L375 BasicCegarLoop]: trace histogram [440, 44, 44, 1, 1, 1] [2018-09-26 21:46:54,729 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:54,729 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:54,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1823205307, now seen corresponding path program 47 times [2018-09-26 21:46:54,730 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:54,730 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:54,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:54,730 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:54,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:54,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:55,569 INFO L134 CoverageAnalysis]: Checked inductivity of 117876 backedges. 0 proven. 115456 refuted. 0 times theorem prover too weak. 2420 trivial. 0 not checked. [2018-09-26 21:46:55,569 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:55,569 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:55,577 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:46:56,679 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 265 check-sat command(s) [2018-09-26 21:46:56,680 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:56,690 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:58,182 INFO L134 CoverageAnalysis]: Checked inductivity of 117876 backedges. 0 proven. 115456 refuted. 0 times theorem prover too weak. 2420 trivial. 0 not checked. [2018-09-26 21:46:58,204 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:58,205 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-26 21:46:58,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-26 21:46:58,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-26 21:46:58,206 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:58,206 INFO L87 Difference]: Start difference. First operand 532 states and 576 transitions. Second operand 47 states. [2018-09-26 21:46:59,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:59,098 INFO L93 Difference]: Finished difference Result 557 states and 603 transitions. [2018-09-26 21:46:59,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-26 21:46:59,098 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 531 [2018-09-26 21:46:59,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:59,100 INFO L225 Difference]: With dead ends: 557 [2018-09-26 21:46:59,100 INFO L226 Difference]: Without dead ends: 555 [2018-09-26 21:46:59,100 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 576 GetRequests, 531 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:59,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2018-09-26 21:46:59,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 544. [2018-09-26 21:46:59,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 544 states. [2018-09-26 21:46:59,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 589 transitions. [2018-09-26 21:46:59,393 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 589 transitions. Word has length 531 [2018-09-26 21:46:59,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:59,394 INFO L480 AbstractCegarLoop]: Abstraction has 544 states and 589 transitions. [2018-09-26 21:46:59,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-26 21:46:59,394 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 589 transitions. [2018-09-26 21:46:59,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 544 [2018-09-26 21:46:59,396 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:59,396 INFO L375 BasicCegarLoop]: trace histogram [450, 45, 45, 1, 1, 1] [2018-09-26 21:46:59,396 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:59,396 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:59,397 INFO L82 PathProgramCache]: Analyzing trace with hash 181299973, now seen corresponding path program 48 times [2018-09-26 21:46:59,397 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:59,397 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:59,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:59,397 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:59,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:59,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:00,259 INFO L134 CoverageAnalysis]: Checked inductivity of 123300 backedges. 0 proven. 120825 refuted. 0 times theorem prover too weak. 2475 trivial. 0 not checked. [2018-09-26 21:47:00,259 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:47:00,259 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:47:00,267 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:47:01,395 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 267 check-sat command(s) [2018-09-26 21:47:01,395 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:47:01,404 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:47:02,861 INFO L134 CoverageAnalysis]: Checked inductivity of 123300 backedges. 0 proven. 120825 refuted. 0 times theorem prover too weak. 2475 trivial. 0 not checked. [2018-09-26 21:47:02,883 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:47:02,883 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-26 21:47:02,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-26 21:47:02,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-26 21:47:02,885 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:47:02,885 INFO L87 Difference]: Start difference. First operand 544 states and 589 transitions. Second operand 48 states. [2018-09-26 21:47:03,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:47:03,781 INFO L93 Difference]: Finished difference Result 569 states and 616 transitions. [2018-09-26 21:47:03,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-26 21:47:03,781 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 543 [2018-09-26 21:47:03,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:47:03,783 INFO L225 Difference]: With dead ends: 569 [2018-09-26 21:47:03,783 INFO L226 Difference]: Without dead ends: 567 [2018-09-26 21:47:03,784 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 589 GetRequests, 543 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:47:03,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2018-09-26 21:47:04,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 556. [2018-09-26 21:47:04,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 556 states. [2018-09-26 21:47:04,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 602 transitions. [2018-09-26 21:47:04,053 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 602 transitions. Word has length 543 [2018-09-26 21:47:04,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:47:04,054 INFO L480 AbstractCegarLoop]: Abstraction has 556 states and 602 transitions. [2018-09-26 21:47:04,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-26 21:47:04,054 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 602 transitions. [2018-09-26 21:47:04,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 556 [2018-09-26 21:47:04,056 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:47:04,056 INFO L375 BasicCegarLoop]: trace histogram [460, 46, 46, 1, 1, 1] [2018-09-26 21:47:04,056 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:47:04,056 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:47:04,057 INFO L82 PathProgramCache]: Analyzing trace with hash -2077995185, now seen corresponding path program 49 times [2018-09-26 21:47:04,057 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:47:04,057 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:47:04,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:04,058 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:47:04,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:04,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:05,031 INFO L134 CoverageAnalysis]: Checked inductivity of 128846 backedges. 0 proven. 126316 refuted. 0 times theorem prover too weak. 2530 trivial. 0 not checked. [2018-09-26 21:47:05,032 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:47:05,032 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:47:05,039 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:47:05,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:05,350 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:47:06,836 INFO L134 CoverageAnalysis]: Checked inductivity of 128846 backedges. 0 proven. 126316 refuted. 0 times theorem prover too weak. 2530 trivial. 0 not checked. [2018-09-26 21:47:06,857 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:47:06,858 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-26 21:47:06,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-26 21:47:06,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-26 21:47:06,859 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:47:06,859 INFO L87 Difference]: Start difference. First operand 556 states and 602 transitions. Second operand 49 states. [2018-09-26 21:47:07,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:47:07,786 INFO L93 Difference]: Finished difference Result 581 states and 629 transitions. [2018-09-26 21:47:07,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-26 21:47:07,786 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 555 [2018-09-26 21:47:07,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:47:07,789 INFO L225 Difference]: With dead ends: 581 [2018-09-26 21:47:07,789 INFO L226 Difference]: Without dead ends: 579 [2018-09-26 21:47:07,789 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 602 GetRequests, 555 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:47:07,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2018-09-26 21:47:08,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 568. [2018-09-26 21:47:08,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 568 states. [2018-09-26 21:47:08,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 615 transitions. [2018-09-26 21:47:08,097 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 615 transitions. Word has length 555 [2018-09-26 21:47:08,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:47:08,097 INFO L480 AbstractCegarLoop]: Abstraction has 568 states and 615 transitions. [2018-09-26 21:47:08,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-26 21:47:08,098 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 615 transitions. [2018-09-26 21:47:08,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 568 [2018-09-26 21:47:08,100 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:47:08,101 INFO L375 BasicCegarLoop]: trace histogram [470, 47, 47, 1, 1, 1] [2018-09-26 21:47:08,101 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:47:08,101 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:47:08,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1235489945, now seen corresponding path program 50 times [2018-09-26 21:47:08,101 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:47:08,101 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:47:08,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:08,102 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:47:08,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:08,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:08,975 INFO L134 CoverageAnalysis]: Checked inductivity of 134514 backedges. 0 proven. 131929 refuted. 0 times theorem prover too weak. 2585 trivial. 0 not checked. [2018-09-26 21:47:08,975 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:47:08,975 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:47:08,984 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:47:09,293 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:47:09,294 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:47:09,303 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:47:11,095 INFO L134 CoverageAnalysis]: Checked inductivity of 134514 backedges. 0 proven. 131929 refuted. 0 times theorem prover too weak. 2585 trivial. 0 not checked. [2018-09-26 21:47:11,117 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:47:11,117 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-26 21:47:11,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-26 21:47:11,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-26 21:47:11,118 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:47:11,119 INFO L87 Difference]: Start difference. First operand 568 states and 615 transitions. Second operand 50 states. [2018-09-26 21:47:12,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:47:12,045 INFO L93 Difference]: Finished difference Result 593 states and 642 transitions. [2018-09-26 21:47:12,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-26 21:47:12,046 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 567 [2018-09-26 21:47:12,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:47:12,048 INFO L225 Difference]: With dead ends: 593 [2018-09-26 21:47:12,048 INFO L226 Difference]: Without dead ends: 591 [2018-09-26 21:47:12,048 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 567 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:47:12,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2018-09-26 21:47:12,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 580. [2018-09-26 21:47:12,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 580 states. [2018-09-26 21:47:12,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 628 transitions. [2018-09-26 21:47:12,368 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 628 transitions. Word has length 567 [2018-09-26 21:47:12,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:47:12,368 INFO L480 AbstractCegarLoop]: Abstraction has 580 states and 628 transitions. [2018-09-26 21:47:12,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-26 21:47:12,368 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 628 transitions. [2018-09-26 21:47:12,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 580 [2018-09-26 21:47:12,370 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:47:12,371 INFO L375 BasicCegarLoop]: trace histogram [480, 48, 48, 1, 1, 1] [2018-09-26 21:47:12,371 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:47:12,371 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:47:12,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1903936797, now seen corresponding path program 51 times [2018-09-26 21:47:12,371 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:47:12,371 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:47:12,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:12,372 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:47:12,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:12,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:13,360 INFO L134 CoverageAnalysis]: Checked inductivity of 140304 backedges. 0 proven. 137664 refuted. 0 times theorem prover too weak. 2640 trivial. 0 not checked. [2018-09-26 21:47:13,360 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:47:13,360 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:47:13,371 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:47:14,684 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 289 check-sat command(s) [2018-09-26 21:47:14,685 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:47:14,694 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:47:16,424 INFO L134 CoverageAnalysis]: Checked inductivity of 140304 backedges. 0 proven. 137664 refuted. 0 times theorem prover too weak. 2640 trivial. 0 not checked. [2018-09-26 21:47:16,445 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:47:16,445 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-26 21:47:16,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-26 21:47:16,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-26 21:47:16,447 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:47:16,447 INFO L87 Difference]: Start difference. First operand 580 states and 628 transitions. Second operand 51 states. [2018-09-26 21:47:17,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:47:17,478 INFO L93 Difference]: Finished difference Result 605 states and 655 transitions. [2018-09-26 21:47:17,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-26 21:47:17,478 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 579 [2018-09-26 21:47:17,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:47:17,480 INFO L225 Difference]: With dead ends: 605 [2018-09-26 21:47:17,481 INFO L226 Difference]: Without dead ends: 603 [2018-09-26 21:47:17,481 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 628 GetRequests, 579 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:47:17,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2018-09-26 21:47:17,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 592. [2018-09-26 21:47:17,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 592 states. [2018-09-26 21:47:17,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 641 transitions. [2018-09-26 21:47:17,786 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 641 transitions. Word has length 579 [2018-09-26 21:47:17,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:47:17,787 INFO L480 AbstractCegarLoop]: Abstraction has 592 states and 641 transitions. [2018-09-26 21:47:17,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-26 21:47:17,787 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 641 transitions. [2018-09-26 21:47:17,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 592 [2018-09-26 21:47:17,789 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:47:17,789 INFO L375 BasicCegarLoop]: trace histogram [490, 49, 49, 1, 1, 1] [2018-09-26 21:47:17,790 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:47:17,790 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:47:17,790 INFO L82 PathProgramCache]: Analyzing trace with hash -398769619, now seen corresponding path program 52 times [2018-09-26 21:47:17,790 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:47:17,790 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:47:17,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:17,791 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:47:17,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:17,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:18,738 INFO L134 CoverageAnalysis]: Checked inductivity of 146216 backedges. 0 proven. 143521 refuted. 0 times theorem prover too weak. 2695 trivial. 0 not checked. [2018-09-26 21:47:18,738 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:47:18,738 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:47:18,767 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:47:19,090 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:47:19,090 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:47:19,100 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:47:20,930 INFO L134 CoverageAnalysis]: Checked inductivity of 146216 backedges. 0 proven. 143521 refuted. 0 times theorem prover too weak. 2695 trivial. 0 not checked. [2018-09-26 21:47:20,951 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:47:20,951 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-26 21:47:20,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-26 21:47:20,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-26 21:47:20,952 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:47:20,952 INFO L87 Difference]: Start difference. First operand 592 states and 641 transitions. Second operand 52 states. [2018-09-26 21:47:22,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:47:22,025 INFO L93 Difference]: Finished difference Result 617 states and 668 transitions. [2018-09-26 21:47:22,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-26 21:47:22,025 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 591 [2018-09-26 21:47:22,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:47:22,027 INFO L225 Difference]: With dead ends: 617 [2018-09-26 21:47:22,027 INFO L226 Difference]: Without dead ends: 615 [2018-09-26 21:47:22,028 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 641 GetRequests, 591 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:47:22,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2018-09-26 21:47:22,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 604. [2018-09-26 21:47:22,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 604 states. [2018-09-26 21:47:22,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 654 transitions. [2018-09-26 21:47:22,377 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 654 transitions. Word has length 591 [2018-09-26 21:47:22,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:47:22,378 INFO L480 AbstractCegarLoop]: Abstraction has 604 states and 654 transitions. [2018-09-26 21:47:22,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-26 21:47:22,378 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 654 transitions. [2018-09-26 21:47:22,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 604 [2018-09-26 21:47:22,380 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:47:22,381 INFO L375 BasicCegarLoop]: trace histogram [500, 50, 50, 1, 1, 1] [2018-09-26 21:47:22,381 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:47:22,381 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:47:22,381 INFO L82 PathProgramCache]: Analyzing trace with hash -293623177, now seen corresponding path program 53 times [2018-09-26 21:47:22,381 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:47:22,381 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:47:22,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:22,382 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:47:22,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:22,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:23,431 INFO L134 CoverageAnalysis]: Checked inductivity of 152250 backedges. 0 proven. 149500 refuted. 0 times theorem prover too weak. 2750 trivial. 0 not checked. [2018-09-26 21:47:23,431 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:47:23,431 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:47:23,441 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:47:24,876 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 301 check-sat command(s) [2018-09-26 21:47:24,876 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:47:24,886 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:47:26,950 INFO L134 CoverageAnalysis]: Checked inductivity of 152250 backedges. 0 proven. 149500 refuted. 0 times theorem prover too weak. 2750 trivial. 0 not checked. [2018-09-26 21:47:26,973 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:47:26,973 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-26 21:47:26,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-26 21:47:26,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-26 21:47:26,974 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:47:26,975 INFO L87 Difference]: Start difference. First operand 604 states and 654 transitions. Second operand 53 states. [2018-09-26 21:47:28,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:47:28,081 INFO L93 Difference]: Finished difference Result 629 states and 681 transitions. [2018-09-26 21:47:28,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-26 21:47:28,081 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 603 [2018-09-26 21:47:28,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:47:28,083 INFO L225 Difference]: With dead ends: 629 [2018-09-26 21:47:28,083 INFO L226 Difference]: Without dead ends: 627 [2018-09-26 21:47:28,083 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 654 GetRequests, 603 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:47:28,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2018-09-26 21:47:28,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 616. [2018-09-26 21:47:28,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 616 states. [2018-09-26 21:47:28,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 667 transitions. [2018-09-26 21:47:28,451 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 667 transitions. Word has length 603 [2018-09-26 21:47:28,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:47:28,452 INFO L480 AbstractCegarLoop]: Abstraction has 616 states and 667 transitions. [2018-09-26 21:47:28,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-26 21:47:28,452 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 667 transitions. [2018-09-26 21:47:28,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 616 [2018-09-26 21:47:28,455 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:47:28,455 INFO L375 BasicCegarLoop]: trace histogram [510, 51, 51, 1, 1, 1] [2018-09-26 21:47:28,455 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:47:28,455 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:47:28,455 INFO L82 PathProgramCache]: Analyzing trace with hash -616041535, now seen corresponding path program 54 times [2018-09-26 21:47:28,455 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:47:28,456 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:47:28,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:28,456 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:47:28,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:28,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:29,479 INFO L134 CoverageAnalysis]: Checked inductivity of 158406 backedges. 0 proven. 155601 refuted. 0 times theorem prover too weak. 2805 trivial. 0 not checked. [2018-09-26 21:47:29,480 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:47:29,480 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:47:29,486 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:47:30,909 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 302 check-sat command(s) [2018-09-26 21:47:30,909 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:47:30,919 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:47:32,773 INFO L134 CoverageAnalysis]: Checked inductivity of 158406 backedges. 0 proven. 155601 refuted. 0 times theorem prover too weak. 2805 trivial. 0 not checked. [2018-09-26 21:47:32,795 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:47:32,795 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-26 21:47:32,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-26 21:47:32,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-26 21:47:32,797 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:47:32,797 INFO L87 Difference]: Start difference. First operand 616 states and 667 transitions. Second operand 54 states. [2018-09-26 21:47:33,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:47:33,895 INFO L93 Difference]: Finished difference Result 641 states and 694 transitions. [2018-09-26 21:47:33,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-26 21:47:33,895 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 615 [2018-09-26 21:47:33,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:47:33,897 INFO L225 Difference]: With dead ends: 641 [2018-09-26 21:47:33,897 INFO L226 Difference]: Without dead ends: 639 [2018-09-26 21:47:33,898 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 667 GetRequests, 615 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:47:33,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2018-09-26 21:47:34,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 628. [2018-09-26 21:47:34,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 628 states. [2018-09-26 21:47:34,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 680 transitions. [2018-09-26 21:47:34,255 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 680 transitions. Word has length 615 [2018-09-26 21:47:34,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:47:34,256 INFO L480 AbstractCegarLoop]: Abstraction has 628 states and 680 transitions. [2018-09-26 21:47:34,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-26 21:47:34,256 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 680 transitions. [2018-09-26 21:47:34,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 628 [2018-09-26 21:47:34,258 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:47:34,259 INFO L375 BasicCegarLoop]: trace histogram [520, 52, 52, 1, 1, 1] [2018-09-26 21:47:34,259 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:47:34,259 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:47:34,259 INFO L82 PathProgramCache]: Analyzing trace with hash 717921803, now seen corresponding path program 55 times [2018-09-26 21:47:34,259 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:47:34,259 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:47:34,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:34,260 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:47:34,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:34,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:35,322 INFO L134 CoverageAnalysis]: Checked inductivity of 164684 backedges. 0 proven. 161824 refuted. 0 times theorem prover too weak. 2860 trivial. 0 not checked. [2018-09-26 21:47:35,322 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:47:35,322 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:47:35,330 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:47:35,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:35,679 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:47:37,549 INFO L134 CoverageAnalysis]: Checked inductivity of 164684 backedges. 0 proven. 161824 refuted. 0 times theorem prover too weak. 2860 trivial. 0 not checked. [2018-09-26 21:47:37,571 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:47:37,572 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-26 21:47:37,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-26 21:47:37,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-26 21:47:37,573 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:47:37,573 INFO L87 Difference]: Start difference. First operand 628 states and 680 transitions. Second operand 55 states. [2018-09-26 21:47:38,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:47:38,679 INFO L93 Difference]: Finished difference Result 653 states and 707 transitions. [2018-09-26 21:47:38,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-26 21:47:38,680 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 627 [2018-09-26 21:47:38,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:47:38,682 INFO L225 Difference]: With dead ends: 653 [2018-09-26 21:47:38,682 INFO L226 Difference]: Without dead ends: 651 [2018-09-26 21:47:38,682 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 680 GetRequests, 627 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:47:38,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2018-09-26 21:47:39,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 640. [2018-09-26 21:47:39,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 640 states. [2018-09-26 21:47:39,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 693 transitions. [2018-09-26 21:47:39,046 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 693 transitions. Word has length 627 [2018-09-26 21:47:39,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:47:39,046 INFO L480 AbstractCegarLoop]: Abstraction has 640 states and 693 transitions. [2018-09-26 21:47:39,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-26 21:47:39,047 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 693 transitions. [2018-09-26 21:47:39,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 640 [2018-09-26 21:47:39,049 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:47:39,050 INFO L375 BasicCegarLoop]: trace histogram [530, 53, 53, 1, 1, 1] [2018-09-26 21:47:39,050 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:47:39,050 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:47:39,050 INFO L82 PathProgramCache]: Analyzing trace with hash 998123861, now seen corresponding path program 56 times [2018-09-26 21:47:39,050 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:47:39,050 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:47:39,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:39,051 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:47:39,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:39,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:40,130 INFO L134 CoverageAnalysis]: Checked inductivity of 171084 backedges. 0 proven. 168169 refuted. 0 times theorem prover too weak. 2915 trivial. 0 not checked. [2018-09-26 21:47:40,131 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:47:40,131 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:47:40,139 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:47:40,484 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:47:40,484 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:47:40,494 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:47:42,498 INFO L134 CoverageAnalysis]: Checked inductivity of 171084 backedges. 0 proven. 168169 refuted. 0 times theorem prover too weak. 2915 trivial. 0 not checked. [2018-09-26 21:47:42,520 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:47:42,521 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-26 21:47:42,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-26 21:47:42,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-26 21:47:42,522 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:47:42,522 INFO L87 Difference]: Start difference. First operand 640 states and 693 transitions. Second operand 56 states. [2018-09-26 21:47:43,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:47:43,806 INFO L93 Difference]: Finished difference Result 665 states and 720 transitions. [2018-09-26 21:47:43,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-26 21:47:43,806 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 639 [2018-09-26 21:47:43,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:47:43,808 INFO L225 Difference]: With dead ends: 665 [2018-09-26 21:47:43,808 INFO L226 Difference]: Without dead ends: 663 [2018-09-26 21:47:43,809 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 693 GetRequests, 639 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:47:43,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2018-09-26 21:47:44,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 652. [2018-09-26 21:47:44,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 652 states. [2018-09-26 21:47:44,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 706 transitions. [2018-09-26 21:47:44,191 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 706 transitions. Word has length 639 [2018-09-26 21:47:44,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:47:44,192 INFO L480 AbstractCegarLoop]: Abstraction has 652 states and 706 transitions. [2018-09-26 21:47:44,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-26 21:47:44,192 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 706 transitions. [2018-09-26 21:47:44,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 652 [2018-09-26 21:47:44,195 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:47:44,195 INFO L375 BasicCegarLoop]: trace histogram [540, 54, 54, 1, 1, 1] [2018-09-26 21:47:44,195 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:47:44,195 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:47:44,195 INFO L82 PathProgramCache]: Analyzing trace with hash -300345953, now seen corresponding path program 57 times [2018-09-26 21:47:44,195 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:47:44,196 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:47:44,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:44,196 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:47:44,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:44,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:45,412 INFO L134 CoverageAnalysis]: Checked inductivity of 177606 backedges. 0 proven. 174636 refuted. 0 times theorem prover too weak. 2970 trivial. 0 not checked. [2018-09-26 21:47:45,413 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:47:45,413 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:47:45,421 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:47:47,084 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 325 check-sat command(s) [2018-09-26 21:47:47,084 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:47:47,095 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:47:49,210 INFO L134 CoverageAnalysis]: Checked inductivity of 177606 backedges. 0 proven. 174636 refuted. 0 times theorem prover too weak. 2970 trivial. 0 not checked. [2018-09-26 21:47:49,232 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:47:49,233 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-26 21:47:49,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-26 21:47:49,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-26 21:47:49,234 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:47:49,234 INFO L87 Difference]: Start difference. First operand 652 states and 706 transitions. Second operand 57 states. [2018-09-26 21:47:50,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:47:50,433 INFO L93 Difference]: Finished difference Result 677 states and 733 transitions. [2018-09-26 21:47:50,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-26 21:47:50,434 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 651 [2018-09-26 21:47:50,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:47:50,436 INFO L225 Difference]: With dead ends: 677 [2018-09-26 21:47:50,436 INFO L226 Difference]: Without dead ends: 675 [2018-09-26 21:47:50,436 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 706 GetRequests, 651 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:47:50,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2018-09-26 21:47:50,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 664. [2018-09-26 21:47:50,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 664 states. [2018-09-26 21:47:50,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 719 transitions. [2018-09-26 21:47:50,869 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 719 transitions. Word has length 651 [2018-09-26 21:47:50,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:47:50,869 INFO L480 AbstractCegarLoop]: Abstraction has 664 states and 719 transitions. [2018-09-26 21:47:50,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-26 21:47:50,869 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 719 transitions. [2018-09-26 21:47:50,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 664 [2018-09-26 21:47:50,872 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:47:50,873 INFO L375 BasicCegarLoop]: trace histogram [550, 55, 55, 1, 1, 1] [2018-09-26 21:47:50,873 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:47:50,873 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:47:50,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1167188713, now seen corresponding path program 58 times [2018-09-26 21:47:50,873 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:47:50,874 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:47:50,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:50,874 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:47:50,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:50,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:52,098 INFO L134 CoverageAnalysis]: Checked inductivity of 184250 backedges. 0 proven. 181225 refuted. 0 times theorem prover too weak. 3025 trivial. 0 not checked. [2018-09-26 21:47:52,098 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:47:52,098 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:47:52,107 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:47:52,464 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:47:52,464 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:47:52,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:47:54,538 INFO L134 CoverageAnalysis]: Checked inductivity of 184250 backedges. 0 proven. 181225 refuted. 0 times theorem prover too weak. 3025 trivial. 0 not checked. [2018-09-26 21:47:54,560 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:47:54,560 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-26 21:47:54,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-26 21:47:54,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-26 21:47:54,562 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:47:54,562 INFO L87 Difference]: Start difference. First operand 664 states and 719 transitions. Second operand 58 states. [2018-09-26 21:47:55,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:47:55,836 INFO L93 Difference]: Finished difference Result 689 states and 746 transitions. [2018-09-26 21:47:55,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-26 21:47:55,836 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 663 [2018-09-26 21:47:55,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:47:55,839 INFO L225 Difference]: With dead ends: 689 [2018-09-26 21:47:55,839 INFO L226 Difference]: Without dead ends: 687 [2018-09-26 21:47:55,839 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 719 GetRequests, 663 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:47:55,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2018-09-26 21:47:56,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 676. [2018-09-26 21:47:56,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 676 states. [2018-09-26 21:47:56,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 732 transitions. [2018-09-26 21:47:56,276 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 732 transitions. Word has length 663 [2018-09-26 21:47:56,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:47:56,277 INFO L480 AbstractCegarLoop]: Abstraction has 676 states and 732 transitions. [2018-09-26 21:47:56,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-26 21:47:56,277 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 732 transitions. [2018-09-26 21:47:56,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 676 [2018-09-26 21:47:56,280 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:47:56,280 INFO L375 BasicCegarLoop]: trace histogram [560, 56, 56, 1, 1, 1] [2018-09-26 21:47:56,280 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:47:56,280 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:47:56,281 INFO L82 PathProgramCache]: Analyzing trace with hash 119476531, now seen corresponding path program 59 times [2018-09-26 21:47:56,281 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:47:56,281 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:47:56,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:56,281 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:47:56,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:56,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:57,569 INFO L134 CoverageAnalysis]: Checked inductivity of 191016 backedges. 0 proven. 187936 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2018-09-26 21:47:57,570 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:47:57,570 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:47:57,577 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:47:59,300 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 337 check-sat command(s) [2018-09-26 21:47:59,301 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:47:59,312 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:48:01,461 INFO L134 CoverageAnalysis]: Checked inductivity of 191016 backedges. 0 proven. 187936 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2018-09-26 21:48:01,485 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:48:01,485 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-26 21:48:01,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-26 21:48:01,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-26 21:48:01,487 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:48:01,487 INFO L87 Difference]: Start difference. First operand 676 states and 732 transitions. Second operand 59 states. [2018-09-26 21:48:02,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:48:02,884 INFO L93 Difference]: Finished difference Result 701 states and 759 transitions. [2018-09-26 21:48:02,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-26 21:48:02,884 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 675 [2018-09-26 21:48:02,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:48:02,887 INFO L225 Difference]: With dead ends: 701 [2018-09-26 21:48:02,887 INFO L226 Difference]: Without dead ends: 699 [2018-09-26 21:48:02,887 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 675 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:48:02,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2018-09-26 21:48:03,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 688. [2018-09-26 21:48:03,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 688 states. [2018-09-26 21:48:03,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 745 transitions. [2018-09-26 21:48:03,345 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 745 transitions. Word has length 675 [2018-09-26 21:48:03,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:48:03,346 INFO L480 AbstractCegarLoop]: Abstraction has 688 states and 745 transitions. [2018-09-26 21:48:03,346 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-26 21:48:03,346 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 745 transitions. [2018-09-26 21:48:03,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 688 [2018-09-26 21:48:03,349 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:48:03,349 INFO L375 BasicCegarLoop]: trace histogram [570, 57, 57, 1, 1, 1] [2018-09-26 21:48:03,349 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:48:03,350 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:48:03,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1513562237, now seen corresponding path program 60 times [2018-09-26 21:48:03,350 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:48:03,350 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:48:03,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:03,351 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:48:03,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:03,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:04,651 INFO L134 CoverageAnalysis]: Checked inductivity of 197904 backedges. 0 proven. 194769 refuted. 0 times theorem prover too weak. 3135 trivial. 0 not checked. [2018-09-26 21:48:04,652 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:48:04,652 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:48:04,661 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:48:06,596 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 339 check-sat command(s) [2018-09-26 21:48:06,597 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:48:06,609 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:48:08,862 INFO L134 CoverageAnalysis]: Checked inductivity of 197904 backedges. 0 proven. 194769 refuted. 0 times theorem prover too weak. 3135 trivial. 0 not checked. [2018-09-26 21:48:08,885 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:48:08,886 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-26 21:48:08,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-26 21:48:08,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-26 21:48:08,887 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:48:08,887 INFO L87 Difference]: Start difference. First operand 688 states and 745 transitions. Second operand 60 states. [2018-09-26 21:48:10,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:48:10,298 INFO L93 Difference]: Finished difference Result 713 states and 772 transitions. [2018-09-26 21:48:10,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-26 21:48:10,299 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 687 [2018-09-26 21:48:10,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:48:10,301 INFO L225 Difference]: With dead ends: 713 [2018-09-26 21:48:10,301 INFO L226 Difference]: Without dead ends: 711 [2018-09-26 21:48:10,301 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 745 GetRequests, 687 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:48:10,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2018-09-26 21:48:10,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 700. [2018-09-26 21:48:10,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 700 states. [2018-09-26 21:48:10,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 758 transitions. [2018-09-26 21:48:10,753 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 758 transitions. Word has length 687 [2018-09-26 21:48:10,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:48:10,753 INFO L480 AbstractCegarLoop]: Abstraction has 700 states and 758 transitions. [2018-09-26 21:48:10,753 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-26 21:48:10,753 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 758 transitions. [2018-09-26 21:48:10,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 700 [2018-09-26 21:48:10,756 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:48:10,756 INFO L375 BasicCegarLoop]: trace histogram [580, 58, 58, 1, 1, 1] [2018-09-26 21:48:10,757 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:48:10,757 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:48:10,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1754304711, now seen corresponding path program 61 times [2018-09-26 21:48:10,757 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:48:10,757 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:48:10,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:10,758 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:48:10,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:10,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:12,208 INFO L134 CoverageAnalysis]: Checked inductivity of 204914 backedges. 0 proven. 201724 refuted. 0 times theorem prover too weak. 3190 trivial. 0 not checked. [2018-09-26 21:48:12,208 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:48:12,208 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:48:12,216 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:48:12,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:12,608 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:48:14,893 INFO L134 CoverageAnalysis]: Checked inductivity of 204914 backedges. 0 proven. 201724 refuted. 0 times theorem prover too weak. 3190 trivial. 0 not checked. [2018-09-26 21:48:14,915 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:48:14,916 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-26 21:48:14,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-26 21:48:14,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-26 21:48:14,917 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:48:14,917 INFO L87 Difference]: Start difference. First operand 700 states and 758 transitions. Second operand 61 states. [2018-09-26 21:48:16,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:48:16,268 INFO L93 Difference]: Finished difference Result 725 states and 785 transitions. [2018-09-26 21:48:16,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-26 21:48:16,268 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 699 [2018-09-26 21:48:16,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:48:16,271 INFO L225 Difference]: With dead ends: 725 [2018-09-26 21:48:16,271 INFO L226 Difference]: Without dead ends: 723 [2018-09-26 21:48:16,271 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 758 GetRequests, 699 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:48:16,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2018-09-26 21:48:16,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 712. [2018-09-26 21:48:16,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 712 states. [2018-09-26 21:48:16,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 771 transitions. [2018-09-26 21:48:16,801 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 771 transitions. Word has length 699 [2018-09-26 21:48:16,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:48:16,801 INFO L480 AbstractCegarLoop]: Abstraction has 712 states and 771 transitions. [2018-09-26 21:48:16,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-26 21:48:16,802 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 771 transitions. [2018-09-26 21:48:16,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 712 [2018-09-26 21:48:16,805 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:48:16,805 INFO L375 BasicCegarLoop]: trace histogram [590, 59, 59, 1, 1, 1] [2018-09-26 21:48:16,805 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:48:16,806 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:48:16,806 INFO L82 PathProgramCache]: Analyzing trace with hash -31333871, now seen corresponding path program 62 times [2018-09-26 21:48:16,806 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:48:16,806 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:48:16,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:16,807 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:48:16,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:16,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:18,234 INFO L134 CoverageAnalysis]: Checked inductivity of 212046 backedges. 0 proven. 208801 refuted. 0 times theorem prover too weak. 3245 trivial. 0 not checked. [2018-09-26 21:48:18,234 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:48:18,234 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:48:18,242 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:48:18,625 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:48:18,625 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:48:18,637 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:48:21,041 INFO L134 CoverageAnalysis]: Checked inductivity of 212046 backedges. 0 proven. 208801 refuted. 0 times theorem prover too weak. 3245 trivial. 0 not checked. [2018-09-26 21:48:21,063 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:48:21,063 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-26 21:48:21,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-26 21:48:21,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-26 21:48:21,065 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:48:21,065 INFO L87 Difference]: Start difference. First operand 712 states and 771 transitions. Second operand 62 states. [2018-09-26 21:48:22,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:48:22,554 INFO L93 Difference]: Finished difference Result 737 states and 798 transitions. [2018-09-26 21:48:22,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-26 21:48:22,555 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 711 [2018-09-26 21:48:22,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:48:22,557 INFO L225 Difference]: With dead ends: 737 [2018-09-26 21:48:22,557 INFO L226 Difference]: Without dead ends: 735 [2018-09-26 21:48:22,558 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 771 GetRequests, 711 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:48:22,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2018-09-26 21:48:23,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 724. [2018-09-26 21:48:23,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 724 states. [2018-09-26 21:48:23,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 784 transitions. [2018-09-26 21:48:23,089 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 784 transitions. Word has length 711 [2018-09-26 21:48:23,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:48:23,089 INFO L480 AbstractCegarLoop]: Abstraction has 724 states and 784 transitions. [2018-09-26 21:48:23,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-26 21:48:23,089 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 784 transitions. [2018-09-26 21:48:23,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 724 [2018-09-26 21:48:23,093 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:48:23,093 INFO L375 BasicCegarLoop]: trace histogram [600, 60, 60, 1, 1, 1] [2018-09-26 21:48:23,094 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:48:23,094 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:48:23,094 INFO L82 PathProgramCache]: Analyzing trace with hash 690066523, now seen corresponding path program 63 times [2018-09-26 21:48:23,094 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:48:23,094 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:48:23,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:23,095 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:48:23,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:23,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:24,520 INFO L134 CoverageAnalysis]: Checked inductivity of 219300 backedges. 0 proven. 216000 refuted. 0 times theorem prover too weak. 3300 trivial. 0 not checked. [2018-09-26 21:48:24,520 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:48:24,520 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:48:24,530 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:48:26,641 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 361 check-sat command(s) [2018-09-26 21:48:26,641 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:48:26,654 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:48:29,049 INFO L134 CoverageAnalysis]: Checked inductivity of 219300 backedges. 0 proven. 216000 refuted. 0 times theorem prover too weak. 3300 trivial. 0 not checked. [2018-09-26 21:48:29,071 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:48:29,072 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-09-26 21:48:29,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-26 21:48:29,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-26 21:48:29,073 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:48:29,074 INFO L87 Difference]: Start difference. First operand 724 states and 784 transitions. Second operand 63 states. [2018-09-26 21:48:30,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:48:30,611 INFO L93 Difference]: Finished difference Result 749 states and 811 transitions. [2018-09-26 21:48:30,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-26 21:48:30,611 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 723 [2018-09-26 21:48:30,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:48:30,614 INFO L225 Difference]: With dead ends: 749 [2018-09-26 21:48:30,614 INFO L226 Difference]: Without dead ends: 747 [2018-09-26 21:48:30,614 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 784 GetRequests, 723 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:48:30,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2018-09-26 21:48:31,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 736. [2018-09-26 21:48:31,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 736 states. [2018-09-26 21:48:31,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 797 transitions. [2018-09-26 21:48:31,169 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 797 transitions. Word has length 723 [2018-09-26 21:48:31,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:48:31,169 INFO L480 AbstractCegarLoop]: Abstraction has 736 states and 797 transitions. [2018-09-26 21:48:31,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-26 21:48:31,169 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 797 transitions. [2018-09-26 21:48:31,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 736 [2018-09-26 21:48:31,173 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:48:31,173 INFO L375 BasicCegarLoop]: trace histogram [610, 61, 61, 1, 1, 1] [2018-09-26 21:48:31,174 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:48:31,174 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:48:31,174 INFO L82 PathProgramCache]: Analyzing trace with hash -637130843, now seen corresponding path program 64 times [2018-09-26 21:48:31,174 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:48:31,174 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:48:31,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:31,175 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:48:31,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:31,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:32,874 INFO L134 CoverageAnalysis]: Checked inductivity of 226676 backedges. 0 proven. 223321 refuted. 0 times theorem prover too weak. 3355 trivial. 0 not checked. [2018-09-26 21:48:32,874 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:48:32,874 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:48:32,882 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:48:33,296 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:48:33,296 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:48:33,309 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:48:35,772 INFO L134 CoverageAnalysis]: Checked inductivity of 226676 backedges. 0 proven. 223321 refuted. 0 times theorem prover too weak. 3355 trivial. 0 not checked. [2018-09-26 21:48:35,795 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:48:35,796 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-26 21:48:35,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-26 21:48:35,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-26 21:48:35,797 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:48:35,797 INFO L87 Difference]: Start difference. First operand 736 states and 797 transitions. Second operand 64 states. [2018-09-26 21:48:37,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:48:37,470 INFO L93 Difference]: Finished difference Result 761 states and 824 transitions. [2018-09-26 21:48:37,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-26 21:48:37,470 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 735 [2018-09-26 21:48:37,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:48:37,473 INFO L225 Difference]: With dead ends: 761 [2018-09-26 21:48:37,473 INFO L226 Difference]: Without dead ends: 759 [2018-09-26 21:48:37,473 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 797 GetRequests, 735 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:48:37,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2018-09-26 21:48:38,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 748. [2018-09-26 21:48:38,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 748 states. [2018-09-26 21:48:38,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 810 transitions. [2018-09-26 21:48:38,048 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 810 transitions. Word has length 735 [2018-09-26 21:48:38,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:48:38,048 INFO L480 AbstractCegarLoop]: Abstraction has 748 states and 810 transitions. [2018-09-26 21:48:38,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-26 21:48:38,048 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 810 transitions. [2018-09-26 21:48:38,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 748 [2018-09-26 21:48:38,052 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:48:38,052 INFO L375 BasicCegarLoop]: trace histogram [620, 62, 62, 1, 1, 1] [2018-09-26 21:48:38,053 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:48:38,053 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:48:38,053 INFO L82 PathProgramCache]: Analyzing trace with hash -2088363025, now seen corresponding path program 65 times [2018-09-26 21:48:38,053 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:48:38,053 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:48:38,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:38,054 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:48:38,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:38,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:39,632 INFO L134 CoverageAnalysis]: Checked inductivity of 234174 backedges. 0 proven. 230764 refuted. 0 times theorem prover too weak. 3410 trivial. 0 not checked. [2018-09-26 21:48:39,632 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:48:39,632 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:48:39,639 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:48:41,771 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 373 check-sat command(s) [2018-09-26 21:48:41,772 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:48:41,784 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:48:44,439 INFO L134 CoverageAnalysis]: Checked inductivity of 234174 backedges. 0 proven. 230764 refuted. 0 times theorem prover too weak. 3410 trivial. 0 not checked. [2018-09-26 21:48:44,463 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:48:44,464 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-26 21:48:44,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-26 21:48:44,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-26 21:48:44,465 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:48:44,465 INFO L87 Difference]: Start difference. First operand 748 states and 810 transitions. Second operand 65 states. [2018-09-26 21:48:46,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:48:46,067 INFO L93 Difference]: Finished difference Result 773 states and 837 transitions. [2018-09-26 21:48:46,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-26 21:48:46,068 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 747 [2018-09-26 21:48:46,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:48:46,070 INFO L225 Difference]: With dead ends: 773 [2018-09-26 21:48:46,070 INFO L226 Difference]: Without dead ends: 771 [2018-09-26 21:48:46,071 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 810 GetRequests, 747 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:48:46,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2018-09-26 21:48:46,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 760. [2018-09-26 21:48:46,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 760 states. [2018-09-26 21:48:46,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 823 transitions. [2018-09-26 21:48:46,628 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 823 transitions. Word has length 747 [2018-09-26 21:48:46,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:48:46,628 INFO L480 AbstractCegarLoop]: Abstraction has 760 states and 823 transitions. [2018-09-26 21:48:46,629 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-26 21:48:46,629 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 823 transitions. [2018-09-26 21:48:46,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 760 [2018-09-26 21:48:46,632 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:48:46,633 INFO L375 BasicCegarLoop]: trace histogram [630, 63, 63, 1, 1, 1] [2018-09-26 21:48:46,633 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:48:46,633 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:48:46,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1164447431, now seen corresponding path program 66 times [2018-09-26 21:48:46,633 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:48:46,633 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:48:46,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:46,634 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:48:46,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:46,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:48,362 INFO L134 CoverageAnalysis]: Checked inductivity of 241794 backedges. 0 proven. 238329 refuted. 0 times theorem prover too weak. 3465 trivial. 0 not checked. [2018-09-26 21:48:48,362 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:48:48,362 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:48:48,369 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:48:50,595 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 374 check-sat command(s) [2018-09-26 21:48:50,595 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:48:50,609 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:48:53,379 INFO L134 CoverageAnalysis]: Checked inductivity of 241794 backedges. 0 proven. 238329 refuted. 0 times theorem prover too weak. 3465 trivial. 0 not checked. [2018-09-26 21:48:53,402 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:48:53,402 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-26 21:48:53,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-26 21:48:53,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-26 21:48:53,404 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:48:53,404 INFO L87 Difference]: Start difference. First operand 760 states and 823 transitions. Second operand 66 states. [2018-09-26 21:48:55,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:48:55,070 INFO L93 Difference]: Finished difference Result 785 states and 850 transitions. [2018-09-26 21:48:55,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-26 21:48:55,070 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 759 [2018-09-26 21:48:55,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:48:55,073 INFO L225 Difference]: With dead ends: 785 [2018-09-26 21:48:55,073 INFO L226 Difference]: Without dead ends: 783 [2018-09-26 21:48:55,073 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 823 GetRequests, 759 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:48:55,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2018-09-26 21:48:55,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 772. [2018-09-26 21:48:55,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 772 states. [2018-09-26 21:48:55,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 836 transitions. [2018-09-26 21:48:55,625 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 836 transitions. Word has length 759 [2018-09-26 21:48:55,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:48:55,625 INFO L480 AbstractCegarLoop]: Abstraction has 772 states and 836 transitions. [2018-09-26 21:48:55,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-26 21:48:55,625 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 836 transitions. [2018-09-26 21:48:55,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 772 [2018-09-26 21:48:55,644 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:48:55,644 INFO L375 BasicCegarLoop]: trace histogram [640, 64, 64, 1, 1, 1] [2018-09-26 21:48:55,644 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:48:55,644 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:48:55,644 INFO L82 PathProgramCache]: Analyzing trace with hash -697161853, now seen corresponding path program 67 times [2018-09-26 21:48:55,645 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:48:55,645 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:48:55,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:55,645 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:48:55,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:55,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:57,554 INFO L134 CoverageAnalysis]: Checked inductivity of 249536 backedges. 0 proven. 246016 refuted. 0 times theorem prover too weak. 3520 trivial. 0 not checked. [2018-09-26 21:48:57,554 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:48:57,555 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:48:57,562 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:48:57,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:57,997 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:49:00,725 INFO L134 CoverageAnalysis]: Checked inductivity of 249536 backedges. 0 proven. 246016 refuted. 0 times theorem prover too weak. 3520 trivial. 0 not checked. [2018-09-26 21:49:00,748 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:49:00,748 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-26 21:49:00,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-26 21:49:00,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-26 21:49:00,750 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:49:00,750 INFO L87 Difference]: Start difference. First operand 772 states and 836 transitions. Second operand 67 states. [2018-09-26 21:49:02,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:49:02,512 INFO L93 Difference]: Finished difference Result 797 states and 863 transitions. [2018-09-26 21:49:02,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-26 21:49:02,513 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 771 [2018-09-26 21:49:02,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:49:02,515 INFO L225 Difference]: With dead ends: 797 [2018-09-26 21:49:02,515 INFO L226 Difference]: Without dead ends: 795 [2018-09-26 21:49:02,516 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 836 GetRequests, 771 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:49:02,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2018-09-26 21:49:03,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 784. [2018-09-26 21:49:03,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 784 states. [2018-09-26 21:49:03,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 849 transitions. [2018-09-26 21:49:03,101 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 849 transitions. Word has length 771 [2018-09-26 21:49:03,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:49:03,101 INFO L480 AbstractCegarLoop]: Abstraction has 784 states and 849 transitions. [2018-09-26 21:49:03,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-26 21:49:03,101 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 849 transitions. [2018-09-26 21:49:03,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 784 [2018-09-26 21:49:03,105 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:49:03,105 INFO L375 BasicCegarLoop]: trace histogram [650, 65, 65, 1, 1, 1] [2018-09-26 21:49:03,105 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:49:03,105 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:49:03,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1869922611, now seen corresponding path program 68 times [2018-09-26 21:49:03,106 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:49:03,106 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:49:03,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:03,107 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:49:03,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:03,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:04,787 INFO L134 CoverageAnalysis]: Checked inductivity of 257400 backedges. 0 proven. 253825 refuted. 0 times theorem prover too weak. 3575 trivial. 0 not checked. [2018-09-26 21:49:04,788 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:49:04,788 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:49:04,796 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:49:05,224 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:49:05,225 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:49:05,237 INFO L273 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2018-09-26 21:49:08,006 INFO L134 CoverageAnalysis]: Checked inductivity of 257400 backedges. 0 proven. 253825 refuted. 0 times theorem prover too weak. 3575 trivial. 0 not checked. [2018-09-26 21:49:08,028 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:49:08,028 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-26 21:49:08,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-26 21:49:08,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-26 21:49:08,030 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:49:08,030 INFO L87 Difference]: Start difference. First operand 784 states and 849 transitions. Second operand 68 states. [2018-09-26 21:49:08,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-09-26 21:49:08,031 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-26 21:49:08,037 WARN L206 ceAbstractionStarter]: Timeout [2018-09-26 21:49:08,037 INFO L202 PluginConnector]: Adding new model nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.09 09:49:08 BoogieIcfgContainer [2018-09-26 21:49:08,037 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-26 21:49:08,038 INFO L168 Benchmark]: Toolchain (without parser) took 246553.19 ms. Allocated memory was 1.5 GB in the beginning and 3.4 GB in the end (delta: 1.9 GB). Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 20.8 MB). Peak memory consumption was 1.9 GB. Max. memory is 7.1 GB. [2018-09-26 21:49:08,040 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-26 21:49:08,041 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.27 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-26 21:49:08,041 INFO L168 Benchmark]: Boogie Preprocessor took 23.08 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-26 21:49:08,041 INFO L168 Benchmark]: RCFGBuilder took 234.24 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-26 21:49:08,042 INFO L168 Benchmark]: TraceAbstraction took 246241.73 ms. Allocated memory was 1.5 GB in the beginning and 3.4 GB in the end (delta: 1.9 GB). Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: -357.6 kB). Peak memory consumption was 1.9 GB. Max. memory is 7.1 GB. [2018-09-26 21:49:08,046 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 45.27 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 23.08 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 234.24 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 246241.73 ms. Allocated memory was 1.5 GB in the beginning and 3.4 GB in the end (delta: 1.9 GB). Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: -357.6 kB). Peak memory consumption was 1.9 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 35]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 35). Cancelled while BasicCegarLoop was constructing difference of abstraction (784states) and FLOYD_HOARE automaton (currently 2 states, 68 states before enhancement), while ReachableStatesComputation was computing reachable states (1 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 246.1s OverallTime, 70 OverallIterations, 650 TraceHistogramMax, 61.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 274 SDtfs, 4284 SDslu, 3203 SDs, 0 SdLazy, 5560 SolverSat, 424 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 7.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 28366 GetRequests, 25891 SyntacticMatches, 0 SemanticMatches, 2475 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=784occurred in iteration=69, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 13.1s AutomataMinimizationTime, 69 MinimizatonAttempts, 686 StatesRemovedByMinimization, 65 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 3.1s SsaConstructionTime, 33.7s SatisfiabilityAnalysisTime, 109.6s InterpolantComputationTime, 51860 NumberOfCodeBlocks, 51707 NumberOfCodeBlocksAsserted, 6354 NumberOfCheckSat, 51722 ConstructedInterpolants, 0 QuantifiedInterpolants, 81403592 SizeOfPredicates, 68 NumberOfNonLiveVariables, 103630 ConjunctsInSsa, 2305 ConjunctsInUnsatCore, 138 InterpolantComputations, 2 PerfectInterpolantSequences, 238433/11402657 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/nested1.i_4.bplTransformedIcfg_BEv2_12.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-26_21-49-08-057.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/nested1.i_4.bplTransformedIcfg_BEv2_12.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-26_21-49-08-057.csv Completed graceful shutdown