java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Luxembourg-ArraysIntegefied.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cc990c [2018-09-30 23:52:41,173 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 23:52:41,179 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 23:52:41,194 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 23:52:41,198 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 23:52:41,203 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 23:52:41,205 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 23:52:41,209 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 23:52:41,215 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 23:52:41,216 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 23:52:41,219 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-30 23:52:41,219 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-30 23:52:41,222 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-30 23:52:41,224 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-30 23:52:41,225 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-30 23:52:41,227 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-30 23:52:41,228 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-30 23:52:41,230 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-30 23:52:41,235 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-30 23:52:41,240 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-30 23:52:41,241 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-30 23:52:41,244 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-30 23:52:41,249 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-30 23:52:41,249 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-30 23:52:41,252 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-30 23:52:41,253 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-30 23:52:41,254 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-30 23:52:41,256 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-30 23:52:41,256 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-30 23:52:41,259 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-30 23:52:41,260 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-30 23:52:41,261 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-30 23:52:41,261 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-30 23:52:41,261 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-30 23:52:41,262 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-30 23:52:41,266 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-30 23:52:41,266 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-30 23:52:41,288 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 23:52:41,289 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 23:52:41,289 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 23:52:41,290 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 23:52:41,290 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 23:52:41,290 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 23:52:41,291 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 23:52:41,291 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 23:52:41,291 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 23:52:41,291 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 23:52:41,292 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 23:52:41,292 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 23:52:41,292 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 23:52:41,292 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 23:52:41,292 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 23:52:41,292 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 23:52:41,293 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 23:52:41,293 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 23:52:41,293 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 23:52:41,293 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 23:52:41,293 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 23:52:41,294 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 23:52:41,294 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 23:52:41,294 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 23:52:41,294 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 23:52:41,294 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 23:52:41,295 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 23:52:41,295 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 23:52:41,295 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 23:52:41,295 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 23:52:41,340 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 23:52:41,356 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 23:52:41,362 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 23:52:41,364 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 23:52:41,365 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 23:52:41,367 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Luxembourg-ArraysIntegefied.bpl [2018-09-30 23:52:41,367 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Luxembourg-ArraysIntegefied.bpl' [2018-09-30 23:52:41,418 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 23:52:41,421 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 23:52:41,422 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 23:52:41,422 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 23:52:41,422 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 23:52:41,444 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:52:41" (1/1) ... [2018-09-30 23:52:41,457 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:52:41" (1/1) ... [2018-09-30 23:52:41,462 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-30 23:52:41,463 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-30 23:52:41,463 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-30 23:52:41,465 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 23:52:41,466 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 23:52:41,466 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 23:52:41,466 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 23:52:41,478 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:52:41" (1/1) ... [2018-09-30 23:52:41,478 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:52:41" (1/1) ... [2018-09-30 23:52:41,479 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:52:41" (1/1) ... [2018-09-30 23:52:41,479 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:52:41" (1/1) ... [2018-09-30 23:52:41,481 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:52:41" (1/1) ... [2018-09-30 23:52:41,486 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:52:41" (1/1) ... [2018-09-30 23:52:41,487 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:52:41" (1/1) ... [2018-09-30 23:52:41,489 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 23:52:41,489 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 23:52:41,489 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 23:52:41,490 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 23:52:41,491 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:52:41" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 23:52:41,568 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-09-30 23:52:41,569 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-30 23:52:41,569 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-30 23:52:41,979 INFO L345 CfgBuilder]: Using library mode [2018-09-30 23:52:41,980 INFO L202 PluginConnector]: Adding new model Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 11:52:41 BoogieIcfgContainer [2018-09-30 23:52:41,980 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 23:52:41,981 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 23:52:41,981 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 23:52:41,987 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 23:52:41,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:52:41" (1/2) ... [2018-09-30 23:52:41,988 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@692466fc and model type Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 11:52:41, skipping insertion in model container [2018-09-30 23:52:41,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 11:52:41" (2/2) ... [2018-09-30 23:52:41,991 INFO L112 eAbstractionObserver]: Analyzing ICFG Luxembourg-ArraysIntegefied.bpl [2018-09-30 23:52:42,003 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 23:52:42,012 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 23:52:42,068 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 23:52:42,069 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 23:52:42,069 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 23:52:42,069 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 23:52:42,069 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 23:52:42,070 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 23:52:42,070 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 23:52:42,070 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 23:52:42,070 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 23:52:42,086 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2018-09-30 23:52:42,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-30 23:52:42,093 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:42,094 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-09-30 23:52:42,095 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:42,101 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:42,102 INFO L82 PathProgramCache]: Analyzing trace with hash 890493448, now seen corresponding path program 1 times [2018-09-30 23:52:42,104 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:42,104 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:42,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:42,149 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:52:42,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:42,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:42,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:42,284 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 23:52:42,285 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-30 23:52:42,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 23:52:42,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 23:52:42,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 23:52:42,319 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 3 states. [2018-09-30 23:52:42,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:42,413 INFO L93 Difference]: Finished difference Result 22 states and 31 transitions. [2018-09-30 23:52:42,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 23:52:42,417 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2018-09-30 23:52:42,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:42,432 INFO L225 Difference]: With dead ends: 22 [2018-09-30 23:52:42,434 INFO L226 Difference]: Without dead ends: 10 [2018-09-30 23:52:42,438 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 23:52:42,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-30 23:52:42,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-30 23:52:42,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-30 23:52:42,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-30 23:52:42,476 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 6 [2018-09-30 23:52:42,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:42,477 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-30 23:52:42,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 23:52:42,477 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-30 23:52:42,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-30 23:52:42,479 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:42,479 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-09-30 23:52:42,479 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:42,480 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:42,480 INFO L82 PathProgramCache]: Analyzing trace with hash 892342412, now seen corresponding path program 1 times [2018-09-30 23:52:42,480 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:42,480 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:42,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:42,482 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:52:42,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:42,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:42,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:42,514 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 23:52:42,514 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-30 23:52:42,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 23:52:42,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 23:52:42,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 23:52:42,517 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 3 states. [2018-09-30 23:52:42,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:42,528 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-30 23:52:42,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 23:52:42,528 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2018-09-30 23:52:42,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:42,529 INFO L225 Difference]: With dead ends: 13 [2018-09-30 23:52:42,529 INFO L226 Difference]: Without dead ends: 11 [2018-09-30 23:52:42,530 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 23:52:42,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-30 23:52:42,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-30 23:52:42,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-30 23:52:42,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-30 23:52:42,535 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 6 [2018-09-30 23:52:42,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:42,537 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-30 23:52:42,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 23:52:42,537 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-30 23:52:42,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 23:52:42,538 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:42,538 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:52:42,538 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:42,539 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:42,539 INFO L82 PathProgramCache]: Analyzing trace with hash -391235530, now seen corresponding path program 1 times [2018-09-30 23:52:42,540 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:42,540 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:42,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:42,541 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:52:42,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:42,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:42,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:42,641 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:42,642 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:52:42,652 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:52:42,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:42,670 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:42,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:42,707 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:42,707 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-30 23:52:42,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 23:52:42,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 23:52:42,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-30 23:52:42,709 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 4 states. [2018-09-30 23:52:42,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:42,732 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-30 23:52:42,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 23:52:42,733 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2018-09-30 23:52:42,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:42,734 INFO L225 Difference]: With dead ends: 17 [2018-09-30 23:52:42,734 INFO L226 Difference]: Without dead ends: 15 [2018-09-30 23:52:42,735 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-30 23:52:42,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-30 23:52:42,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-30 23:52:42,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-30 23:52:42,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-30 23:52:42,738 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 10 [2018-09-30 23:52:42,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:42,738 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-30 23:52:42,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 23:52:42,739 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-30 23:52:42,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 23:52:42,739 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:42,740 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-09-30 23:52:42,740 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:42,740 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:42,741 INFO L82 PathProgramCache]: Analyzing trace with hash -602113312, now seen corresponding path program 2 times [2018-09-30 23:52:42,741 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:42,741 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:42,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:42,742 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:52:42,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:42,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:42,815 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:42,816 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:42,816 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:52:42,835 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:52:42,866 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:52:42,867 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:42,869 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:42,876 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:42,896 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:42,896 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-30 23:52:42,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 23:52:42,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 23:52:42,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 23:52:42,897 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 5 states. [2018-09-30 23:52:42,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:42,922 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-30 23:52:42,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 23:52:42,922 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-09-30 23:52:42,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:42,923 INFO L225 Difference]: With dead ends: 21 [2018-09-30 23:52:42,923 INFO L226 Difference]: Without dead ends: 19 [2018-09-30 23:52:42,924 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 23:52:42,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-30 23:52:42,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-30 23:52:42,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-30 23:52:42,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-30 23:52:42,928 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 14 [2018-09-30 23:52:42,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:42,929 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-30 23:52:42,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 23:52:42,929 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-30 23:52:42,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 23:52:42,930 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:42,930 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2018-09-30 23:52:42,930 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:42,930 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:42,931 INFO L82 PathProgramCache]: Analyzing trace with hash 334846090, now seen corresponding path program 3 times [2018-09-30 23:52:42,931 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:42,931 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:42,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:42,932 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:42,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:42,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:43,071 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:43,072 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:43,072 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:52:43,087 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:52:43,103 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-30 23:52:43,104 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:43,106 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:43,114 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:43,135 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:43,135 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 23:52:43,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 23:52:43,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 23:52:43,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 23:52:43,137 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 6 states. [2018-09-30 23:52:43,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:43,170 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-30 23:52:43,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 23:52:43,171 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2018-09-30 23:52:43,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:43,172 INFO L225 Difference]: With dead ends: 25 [2018-09-30 23:52:43,172 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 23:52:43,173 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 23:52:43,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 23:52:43,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-30 23:52:43,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-30 23:52:43,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-30 23:52:43,177 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 18 [2018-09-30 23:52:43,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:43,177 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-30 23:52:43,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 23:52:43,178 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-30 23:52:43,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 23:52:43,178 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:43,178 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2018-09-30 23:52:43,179 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:43,179 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:43,179 INFO L82 PathProgramCache]: Analyzing trace with hash -747417292, now seen corresponding path program 4 times [2018-09-30 23:52:43,179 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:43,179 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:43,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:43,180 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:43,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:43,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:43,479 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:43,480 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:43,480 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:52:43,489 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:52:43,503 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:52:43,504 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:43,505 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:43,518 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:43,538 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:43,539 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 23:52:43,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 23:52:43,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 23:52:43,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:52:43,540 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 7 states. [2018-09-30 23:52:43,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:43,579 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-30 23:52:43,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 23:52:43,580 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2018-09-30 23:52:43,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:43,580 INFO L225 Difference]: With dead ends: 29 [2018-09-30 23:52:43,582 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 23:52:43,582 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:52:43,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 23:52:43,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-30 23:52:43,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-30 23:52:43,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-30 23:52:43,586 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 22 [2018-09-30 23:52:43,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:43,587 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-30 23:52:43,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 23:52:43,587 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-30 23:52:43,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-30 23:52:43,588 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:43,588 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2018-09-30 23:52:43,588 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:43,589 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:43,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1016128734, now seen corresponding path program 5 times [2018-09-30 23:52:43,589 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:43,589 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:43,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:43,592 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:43,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:43,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:43,764 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:43,764 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:43,764 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:52:43,772 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:52:43,794 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-30 23:52:43,794 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:43,802 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:43,813 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:43,842 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:43,842 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 23:52:43,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 23:52:43,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 23:52:43,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:52:43,844 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 8 states. [2018-09-30 23:52:43,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:43,966 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-30 23:52:43,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 23:52:43,967 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2018-09-30 23:52:43,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:43,968 INFO L225 Difference]: With dead ends: 33 [2018-09-30 23:52:43,968 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 23:52:43,969 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:52:43,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 23:52:43,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-30 23:52:43,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-30 23:52:43,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-30 23:52:43,974 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 26 [2018-09-30 23:52:43,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:43,974 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-30 23:52:43,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 23:52:43,974 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-30 23:52:43,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-30 23:52:43,975 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:43,975 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2018-09-30 23:52:43,976 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:43,976 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:43,976 INFO L82 PathProgramCache]: Analyzing trace with hash -267873400, now seen corresponding path program 6 times [2018-09-30 23:52:43,976 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:43,976 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:43,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:43,977 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:43,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:43,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:44,110 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:44,111 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:44,111 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:52:44,119 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:52:44,144 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 23:52:44,144 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:44,147 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:44,157 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:44,182 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:44,182 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:52:44,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:52:44,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:52:44,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:52:44,185 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 9 states. [2018-09-30 23:52:44,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:44,215 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-30 23:52:44,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:52:44,215 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2018-09-30 23:52:44,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:44,216 INFO L225 Difference]: With dead ends: 37 [2018-09-30 23:52:44,216 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 23:52:44,217 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:52:44,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 23:52:44,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-30 23:52:44,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-30 23:52:44,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-30 23:52:44,223 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 30 [2018-09-30 23:52:44,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:44,223 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-30 23:52:44,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:52:44,223 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-30 23:52:44,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-30 23:52:44,224 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:44,225 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2018-09-30 23:52:44,225 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:44,225 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:44,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1386947278, now seen corresponding path program 7 times [2018-09-30 23:52:44,225 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:44,225 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:44,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:44,226 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:44,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:44,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:44,714 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:44,714 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:44,714 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:52:44,726 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:52:44,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:44,754 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:44,766 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:44,789 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:44,790 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:52:44,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:52:44,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:52:44,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:52:44,791 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 10 states. [2018-09-30 23:52:44,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:44,835 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-30 23:52:44,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:52:44,836 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2018-09-30 23:52:44,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:44,837 INFO L225 Difference]: With dead ends: 41 [2018-09-30 23:52:44,838 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 23:52:44,838 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:52:44,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 23:52:44,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-30 23:52:44,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-30 23:52:44,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-30 23:52:44,843 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 34 [2018-09-30 23:52:44,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:44,843 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-30 23:52:44,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:52:44,844 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-30 23:52:44,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-30 23:52:44,845 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:44,845 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2018-09-30 23:52:44,845 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:44,846 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:44,846 INFO L82 PathProgramCache]: Analyzing trace with hash -223329828, now seen corresponding path program 8 times [2018-09-30 23:52:44,846 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:44,846 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:44,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:44,847 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:52:44,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:44,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:45,009 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:45,009 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:45,009 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:52:45,020 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:52:45,036 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:52:45,037 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:45,040 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:45,052 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:45,076 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:45,076 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:52:45,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:52:45,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:52:45,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:52:45,078 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 11 states. [2018-09-30 23:52:45,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:45,147 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-30 23:52:45,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:52:45,149 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2018-09-30 23:52:45,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:45,150 INFO L225 Difference]: With dead ends: 45 [2018-09-30 23:52:45,150 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 23:52:45,151 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:52:45,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 23:52:45,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-30 23:52:45,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-30 23:52:45,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-30 23:52:45,157 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 38 [2018-09-30 23:52:45,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:45,157 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-30 23:52:45,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:52:45,158 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-30 23:52:45,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-30 23:52:45,159 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:45,159 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2018-09-30 23:52:45,159 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:45,160 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:45,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1659551354, now seen corresponding path program 9 times [2018-09-30 23:52:45,160 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:45,160 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:45,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:45,161 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:45,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:45,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:45,432 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:45,432 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:45,432 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:52:45,441 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:52:45,478 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-09-30 23:52:45,478 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:45,480 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:45,494 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:45,518 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:45,518 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-30 23:52:45,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 23:52:45,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 23:52:45,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-30 23:52:45,519 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 12 states. [2018-09-30 23:52:45,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:45,783 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-30 23:52:45,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 23:52:45,784 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 42 [2018-09-30 23:52:45,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:45,785 INFO L225 Difference]: With dead ends: 49 [2018-09-30 23:52:45,785 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 23:52:45,786 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-30 23:52:45,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 23:52:45,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-30 23:52:45,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-30 23:52:45,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-30 23:52:45,792 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 42 [2018-09-30 23:52:45,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:45,794 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-30 23:52:45,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 23:52:45,794 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-30 23:52:45,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-30 23:52:45,795 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:45,795 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2018-09-30 23:52:45,796 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:45,796 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:45,796 INFO L82 PathProgramCache]: Analyzing trace with hash -2009179088, now seen corresponding path program 10 times [2018-09-30 23:52:45,796 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:45,796 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:45,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:45,799 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:45,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:45,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:46,055 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:46,056 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:46,056 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:52:46,065 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:52:46,103 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:52:46,103 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:46,106 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:46,119 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:46,150 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:46,151 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-30 23:52:46,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 23:52:46,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 23:52:46,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-30 23:52:46,152 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 13 states. [2018-09-30 23:52:46,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:46,240 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-30 23:52:46,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 23:52:46,244 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2018-09-30 23:52:46,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:46,245 INFO L225 Difference]: With dead ends: 53 [2018-09-30 23:52:46,245 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 23:52:46,245 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-30 23:52:46,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 23:52:46,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-30 23:52:46,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-30 23:52:46,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-30 23:52:46,250 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 46 [2018-09-30 23:52:46,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:46,250 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-30 23:52:46,251 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 23:52:46,251 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-30 23:52:46,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-30 23:52:46,252 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:46,252 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2018-09-30 23:52:46,252 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:46,252 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:46,252 INFO L82 PathProgramCache]: Analyzing trace with hash 782635482, now seen corresponding path program 11 times [2018-09-30 23:52:46,253 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:46,253 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:46,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:46,254 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:46,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:46,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:46,473 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:46,474 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:46,474 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:52:46,481 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:52:46,527 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-09-30 23:52:46,528 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:46,531 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:46,546 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:46,568 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:46,568 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-30 23:52:46,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 23:52:46,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 23:52:46,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:52:46,569 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 14 states. [2018-09-30 23:52:46,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:46,617 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-30 23:52:46,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 23:52:46,618 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 50 [2018-09-30 23:52:46,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:46,618 INFO L225 Difference]: With dead ends: 57 [2018-09-30 23:52:46,618 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 23:52:46,619 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:52:46,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 23:52:46,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-30 23:52:46,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-30 23:52:46,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-30 23:52:46,624 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 50 [2018-09-30 23:52:46,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:46,625 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-30 23:52:46,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 23:52:46,625 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-30 23:52:46,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-30 23:52:46,626 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:46,626 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2018-09-30 23:52:46,626 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:46,627 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:46,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1233576580, now seen corresponding path program 12 times [2018-09-30 23:52:46,627 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:46,627 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:46,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:46,628 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:46,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:46,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:46,860 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:46,861 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:46,861 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:52:46,875 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:52:47,067 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-30 23:52:47,068 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:47,071 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:47,088 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:47,123 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:47,123 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-30 23:52:47,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 23:52:47,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 23:52:47,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-30 23:52:47,125 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 15 states. [2018-09-30 23:52:47,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:47,209 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-30 23:52:47,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 23:52:47,210 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 54 [2018-09-30 23:52:47,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:47,211 INFO L225 Difference]: With dead ends: 61 [2018-09-30 23:52:47,211 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 23:52:47,211 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-30 23:52:47,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 23:52:47,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-30 23:52:47,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-30 23:52:47,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-30 23:52:47,215 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 54 [2018-09-30 23:52:47,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:47,216 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-30 23:52:47,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 23:52:47,216 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-30 23:52:47,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-30 23:52:47,217 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:47,217 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1] [2018-09-30 23:52:47,217 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:47,217 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:47,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1893420590, now seen corresponding path program 13 times [2018-09-30 23:52:47,217 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:47,218 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:47,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:47,218 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:47,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:47,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:47,441 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:47,442 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:47,442 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:52:47,449 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:52:47,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:47,469 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:47,485 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:47,508 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:47,508 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-30 23:52:47,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 23:52:47,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 23:52:47,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-30 23:52:47,510 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 16 states. [2018-09-30 23:52:47,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:47,612 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-30 23:52:47,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 23:52:47,612 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 58 [2018-09-30 23:52:47,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:47,613 INFO L225 Difference]: With dead ends: 65 [2018-09-30 23:52:47,613 INFO L226 Difference]: Without dead ends: 63 [2018-09-30 23:52:47,614 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-30 23:52:47,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-30 23:52:47,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-30 23:52:47,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-30 23:52:47,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-30 23:52:47,618 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 58 [2018-09-30 23:52:47,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:47,619 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-30 23:52:47,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 23:52:47,619 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-30 23:52:47,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-30 23:52:47,620 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:47,621 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2018-09-30 23:52:47,621 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:47,621 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:47,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1151478568, now seen corresponding path program 14 times [2018-09-30 23:52:47,622 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:47,622 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:47,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:47,623 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:52:47,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:47,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:48,031 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:48,032 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:48,032 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:52:48,039 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:52:48,081 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:52:48,082 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:48,084 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:48,099 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:48,124 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:48,124 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-30 23:52:48,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 23:52:48,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 23:52:48,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-30 23:52:48,125 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 17 states. [2018-09-30 23:52:48,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:48,185 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-30 23:52:48,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 23:52:48,186 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 62 [2018-09-30 23:52:48,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:48,186 INFO L225 Difference]: With dead ends: 69 [2018-09-30 23:52:48,186 INFO L226 Difference]: Without dead ends: 67 [2018-09-30 23:52:48,187 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-30 23:52:48,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-30 23:52:48,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-30 23:52:48,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-30 23:52:48,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-09-30 23:52:48,191 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 62 [2018-09-30 23:52:48,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:48,192 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-09-30 23:52:48,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 23:52:48,192 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-09-30 23:52:48,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-30 23:52:48,193 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:48,193 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1] [2018-09-30 23:52:48,194 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:48,194 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:48,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1586034306, now seen corresponding path program 15 times [2018-09-30 23:52:48,194 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:48,194 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:48,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:48,195 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:48,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:48,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:48,464 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:48,464 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:48,465 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:52:48,472 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:52:48,493 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-09-30 23:52:48,493 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:48,496 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:48,511 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:48,538 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:48,538 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-30 23:52:48,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 23:52:48,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 23:52:48,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-30 23:52:48,539 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 18 states. [2018-09-30 23:52:48,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:48,586 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-30 23:52:48,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 23:52:48,587 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 66 [2018-09-30 23:52:48,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:48,587 INFO L225 Difference]: With dead ends: 73 [2018-09-30 23:52:48,588 INFO L226 Difference]: Without dead ends: 71 [2018-09-30 23:52:48,588 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-30 23:52:48,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-30 23:52:48,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-30 23:52:48,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-30 23:52:48,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-09-30 23:52:48,594 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 66 [2018-09-30 23:52:48,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:48,594 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-09-30 23:52:48,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 23:52:48,595 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-09-30 23:52:48,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-30 23:52:48,596 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:48,596 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1] [2018-09-30 23:52:48,596 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:48,596 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:48,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1318531884, now seen corresponding path program 16 times [2018-09-30 23:52:48,597 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:48,597 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:48,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:48,598 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:48,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:48,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:49,060 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:49,061 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:49,061 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:52:49,068 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:52:49,085 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:52:49,085 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:49,088 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:49,105 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:49,134 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:49,134 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-30 23:52:49,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 23:52:49,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 23:52:49,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-30 23:52:49,136 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 19 states. [2018-09-30 23:52:49,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:49,300 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-30 23:52:49,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 23:52:49,301 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 70 [2018-09-30 23:52:49,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:49,301 INFO L225 Difference]: With dead ends: 77 [2018-09-30 23:52:49,301 INFO L226 Difference]: Without dead ends: 75 [2018-09-30 23:52:49,302 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-30 23:52:49,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-30 23:52:49,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-30 23:52:49,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-30 23:52:49,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-09-30 23:52:49,306 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 70 [2018-09-30 23:52:49,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:49,306 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-09-30 23:52:49,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 23:52:49,307 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-09-30 23:52:49,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-30 23:52:49,308 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:49,308 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1] [2018-09-30 23:52:49,308 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:49,308 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:49,309 INFO L82 PathProgramCache]: Analyzing trace with hash -561837354, now seen corresponding path program 17 times [2018-09-30 23:52:49,309 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:49,309 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:49,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:49,310 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:49,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:49,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:49,799 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:49,800 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:49,800 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:52:49,808 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:52:49,832 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-30 23:52:49,832 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:49,834 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:49,855 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:49,887 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:49,887 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-30 23:52:49,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 23:52:49,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 23:52:49,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-30 23:52:49,888 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 20 states. [2018-09-30 23:52:49,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:49,967 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-30 23:52:49,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 23:52:49,967 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 74 [2018-09-30 23:52:49,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:49,968 INFO L225 Difference]: With dead ends: 81 [2018-09-30 23:52:49,968 INFO L226 Difference]: Without dead ends: 79 [2018-09-30 23:52:49,969 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-30 23:52:49,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-30 23:52:49,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-30 23:52:49,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-30 23:52:49,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-09-30 23:52:49,973 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 74 [2018-09-30 23:52:49,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:49,973 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-09-30 23:52:49,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 23:52:49,974 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-09-30 23:52:49,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-30 23:52:49,975 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:49,975 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1] [2018-09-30 23:52:49,975 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:49,975 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:49,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1611070848, now seen corresponding path program 18 times [2018-09-30 23:52:49,975 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:49,976 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:49,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:49,976 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:49,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:49,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:50,242 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:50,242 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:50,242 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:52:50,250 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:52:50,271 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-30 23:52:50,271 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:50,273 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:50,294 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:50,316 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:50,316 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-30 23:52:50,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 23:52:50,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 23:52:50,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-30 23:52:50,317 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 21 states. [2018-09-30 23:52:50,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:50,386 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-09-30 23:52:50,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 23:52:50,386 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 78 [2018-09-30 23:52:50,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:50,387 INFO L225 Difference]: With dead ends: 85 [2018-09-30 23:52:50,387 INFO L226 Difference]: Without dead ends: 83 [2018-09-30 23:52:50,387 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-30 23:52:50,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-30 23:52:50,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-30 23:52:50,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-30 23:52:50,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-09-30 23:52:50,391 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 78 [2018-09-30 23:52:50,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:50,391 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-09-30 23:52:50,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 23:52:50,392 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-09-30 23:52:50,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-30 23:52:50,392 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:50,393 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1] [2018-09-30 23:52:50,393 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:50,393 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:50,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1013085398, now seen corresponding path program 19 times [2018-09-30 23:52:50,393 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:50,393 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:50,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:50,394 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:50,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:50,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:50,692 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:50,693 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:50,693 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:52:50,704 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:52:50,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:50,724 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:50,743 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:50,774 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:50,774 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-30 23:52:50,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 23:52:50,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 23:52:50,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-30 23:52:50,775 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 22 states. [2018-09-30 23:52:50,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:50,861 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-09-30 23:52:50,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 23:52:50,861 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 82 [2018-09-30 23:52:50,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:50,862 INFO L225 Difference]: With dead ends: 89 [2018-09-30 23:52:50,863 INFO L226 Difference]: Without dead ends: 87 [2018-09-30 23:52:50,863 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-30 23:52:50,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-30 23:52:50,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-09-30 23:52:50,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-30 23:52:50,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-09-30 23:52:50,867 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 82 [2018-09-30 23:52:50,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:50,867 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-09-30 23:52:50,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 23:52:50,867 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-09-30 23:52:50,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-30 23:52:50,868 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:50,868 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1] [2018-09-30 23:52:50,869 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:50,869 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:50,869 INFO L82 PathProgramCache]: Analyzing trace with hash 947991508, now seen corresponding path program 20 times [2018-09-30 23:52:50,869 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:50,869 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:50,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:50,870 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:52:50,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:50,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:51,167 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:51,167 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:51,167 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:52:51,175 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:52:51,221 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:52:51,222 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:51,224 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:51,250 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:51,280 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:51,280 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-30 23:52:51,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 23:52:51,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 23:52:51,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-30 23:52:51,282 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 23 states. [2018-09-30 23:52:51,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:51,354 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-09-30 23:52:51,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 23:52:51,357 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 86 [2018-09-30 23:52:51,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:51,358 INFO L225 Difference]: With dead ends: 93 [2018-09-30 23:52:51,358 INFO L226 Difference]: Without dead ends: 91 [2018-09-30 23:52:51,359 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-30 23:52:51,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-30 23:52:51,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-30 23:52:51,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-30 23:52:51,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-09-30 23:52:51,362 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 86 [2018-09-30 23:52:51,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:51,363 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-09-30 23:52:51,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-30 23:52:51,363 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-09-30 23:52:51,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-30 23:52:51,364 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:51,364 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1] [2018-09-30 23:52:51,365 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:51,365 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:51,365 INFO L82 PathProgramCache]: Analyzing trace with hash -861112450, now seen corresponding path program 21 times [2018-09-30 23:52:51,365 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:51,365 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:51,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:51,366 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:51,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:51,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:52,208 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:52,208 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:52,208 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:52:52,216 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:52:52,242 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-09-30 23:52:52,242 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:52,248 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:52,267 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:52,300 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:52,300 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-30 23:52:52,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 23:52:52,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 23:52:52,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-30 23:52:52,301 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 24 states. [2018-09-30 23:52:52,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:52,487 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-09-30 23:52:52,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 23:52:52,488 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 90 [2018-09-30 23:52:52,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:52,489 INFO L225 Difference]: With dead ends: 97 [2018-09-30 23:52:52,489 INFO L226 Difference]: Without dead ends: 95 [2018-09-30 23:52:52,490 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-30 23:52:52,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-30 23:52:52,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-30 23:52:52,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-30 23:52:52,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-09-30 23:52:52,493 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 90 [2018-09-30 23:52:52,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:52,493 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-09-30 23:52:52,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 23:52:52,493 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-09-30 23:52:52,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-30 23:52:52,494 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:52,494 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1] [2018-09-30 23:52:52,495 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:52,495 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:52,495 INFO L82 PathProgramCache]: Analyzing trace with hash 215602728, now seen corresponding path program 22 times [2018-09-30 23:52:52,495 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:52,495 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:52,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:52,496 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:52,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:52,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:53,443 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:53,444 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:53,444 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:52:53,452 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:52:53,473 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:52:53,473 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:53,477 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:53,502 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:53,533 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:53,533 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-30 23:52:53,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-30 23:52:53,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-30 23:52:53,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-30 23:52:53,534 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 25 states. [2018-09-30 23:52:53,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:53,596 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-09-30 23:52:53,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 23:52:53,596 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 94 [2018-09-30 23:52:53,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:53,597 INFO L225 Difference]: With dead ends: 101 [2018-09-30 23:52:53,598 INFO L226 Difference]: Without dead ends: 99 [2018-09-30 23:52:53,598 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-30 23:52:53,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-30 23:52:53,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-30 23:52:53,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-30 23:52:53,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-09-30 23:52:53,602 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 94 [2018-09-30 23:52:53,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:53,602 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-09-30 23:52:53,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-30 23:52:53,602 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-09-30 23:52:53,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-30 23:52:53,603 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:53,603 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1] [2018-09-30 23:52:53,603 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:53,604 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:53,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1534865454, now seen corresponding path program 23 times [2018-09-30 23:52:53,604 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:53,604 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:53,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:53,605 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:53,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:53,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:54,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:54,003 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:54,003 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:52:54,010 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:52:54,036 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-09-30 23:52:54,037 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:54,038 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:54,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:54,075 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:54,075 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-30 23:52:54,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 23:52:54,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 23:52:54,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-30 23:52:54,076 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 26 states. [2018-09-30 23:52:54,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:54,119 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-09-30 23:52:54,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 23:52:54,120 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 98 [2018-09-30 23:52:54,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:54,121 INFO L225 Difference]: With dead ends: 105 [2018-09-30 23:52:54,122 INFO L226 Difference]: Without dead ends: 103 [2018-09-30 23:52:54,122 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-30 23:52:54,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-30 23:52:54,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-30 23:52:54,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-30 23:52:54,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-09-30 23:52:54,125 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 98 [2018-09-30 23:52:54,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:54,125 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-09-30 23:52:54,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 23:52:54,125 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-09-30 23:52:54,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-30 23:52:54,126 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:54,126 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1] [2018-09-30 23:52:54,126 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:54,126 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:54,127 INFO L82 PathProgramCache]: Analyzing trace with hash -35330948, now seen corresponding path program 24 times [2018-09-30 23:52:54,127 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:54,127 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:54,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:54,128 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:54,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:54,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:54,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:54,800 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:54,800 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:52:54,807 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:52:54,836 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-30 23:52:54,836 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:54,838 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:54,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:54,896 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:54,897 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-30 23:52:54,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-30 23:52:54,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-30 23:52:54,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-30 23:52:54,898 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 27 states. [2018-09-30 23:52:55,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:55,066 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-09-30 23:52:55,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 23:52:55,066 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 102 [2018-09-30 23:52:55,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:55,067 INFO L225 Difference]: With dead ends: 109 [2018-09-30 23:52:55,068 INFO L226 Difference]: Without dead ends: 107 [2018-09-30 23:52:55,068 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-30 23:52:55,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-30 23:52:55,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-30 23:52:55,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-30 23:52:55,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-09-30 23:52:55,072 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 102 [2018-09-30 23:52:55,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:55,072 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-09-30 23:52:55,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-30 23:52:55,072 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-09-30 23:52:55,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-30 23:52:55,073 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:55,073 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 1, 1, 1, 1, 1, 1] [2018-09-30 23:52:55,073 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:55,073 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:55,073 INFO L82 PathProgramCache]: Analyzing trace with hash -503868378, now seen corresponding path program 25 times [2018-09-30 23:52:55,073 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:55,074 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:55,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:55,074 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:55,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:55,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:55,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:55,844 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:55,844 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:52:55,851 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:52:55,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:55,873 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:55,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:55,922 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:55,922 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-30 23:52:55,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 23:52:55,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 23:52:55,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-30 23:52:55,923 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 28 states. [2018-09-30 23:52:55,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:55,989 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-09-30 23:52:55,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-30 23:52:55,989 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 106 [2018-09-30 23:52:55,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:55,991 INFO L225 Difference]: With dead ends: 113 [2018-09-30 23:52:55,991 INFO L226 Difference]: Without dead ends: 111 [2018-09-30 23:52:55,992 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-30 23:52:55,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-30 23:52:55,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-09-30 23:52:55,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-30 23:52:55,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-09-30 23:52:55,994 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 106 [2018-09-30 23:52:55,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:55,994 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-09-30 23:52:55,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 23:52:55,994 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-09-30 23:52:55,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-30 23:52:55,995 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:55,995 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 1, 1, 1, 1, 1, 1] [2018-09-30 23:52:55,995 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:55,995 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:55,995 INFO L82 PathProgramCache]: Analyzing trace with hash 410410704, now seen corresponding path program 26 times [2018-09-30 23:52:55,996 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:55,996 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:55,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:55,996 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:52:55,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:56,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:56,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:56,884 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:56,884 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:52:56,891 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:52:56,916 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:52:56,916 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:56,918 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:56,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:56,975 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:56,975 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-30 23:52:56,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 23:52:56,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 23:52:56,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-30 23:52:56,976 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 29 states. [2018-09-30 23:52:57,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:57,122 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-09-30 23:52:57,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 23:52:57,123 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 110 [2018-09-30 23:52:57,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:57,124 INFO L225 Difference]: With dead ends: 117 [2018-09-30 23:52:57,124 INFO L226 Difference]: Without dead ends: 115 [2018-09-30 23:52:57,125 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-30 23:52:57,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-30 23:52:57,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-30 23:52:57,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-30 23:52:57,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-09-30 23:52:57,128 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 110 [2018-09-30 23:52:57,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:57,129 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-09-30 23:52:57,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 23:52:57,129 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-09-30 23:52:57,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-30 23:52:57,130 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:57,130 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 1, 1, 1, 1, 1, 1] [2018-09-30 23:52:57,130 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:57,130 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:57,131 INFO L82 PathProgramCache]: Analyzing trace with hash 131843194, now seen corresponding path program 27 times [2018-09-30 23:52:57,131 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:57,131 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:57,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:57,132 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:57,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:57,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:58,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:58,534 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:58,534 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:52:58,543 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:52:58,576 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-09-30 23:52:58,576 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:58,578 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:58,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:58,621 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:58,621 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-30 23:52:58,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 23:52:58,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 23:52:58,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-30 23:52:58,622 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 30 states. [2018-09-30 23:52:58,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:58,673 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-09-30 23:52:58,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 23:52:58,674 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 114 [2018-09-30 23:52:58,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:58,675 INFO L225 Difference]: With dead ends: 121 [2018-09-30 23:52:58,675 INFO L226 Difference]: Without dead ends: 119 [2018-09-30 23:52:58,676 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-30 23:52:58,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-30 23:52:58,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-09-30 23:52:58,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-30 23:52:58,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-09-30 23:52:58,680 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 114 [2018-09-30 23:52:58,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:58,680 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-09-30 23:52:58,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 23:52:58,681 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-09-30 23:52:58,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-30 23:52:58,681 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:58,681 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 1, 1, 1, 1, 1, 1] [2018-09-30 23:52:58,682 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:58,682 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:58,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1432503588, now seen corresponding path program 28 times [2018-09-30 23:52:58,682 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:58,682 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:58,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:58,683 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:58,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:58,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:59,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:59,204 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:59,204 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:52:59,214 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:52:59,240 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:52:59,240 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:59,242 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:59,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:59,288 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:59,289 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-30 23:52:59,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-30 23:52:59,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-30 23:52:59,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-30 23:52:59,290 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 31 states. [2018-09-30 23:52:59,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:59,375 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-09-30 23:52:59,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 23:52:59,376 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 118 [2018-09-30 23:52:59,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:59,378 INFO L225 Difference]: With dead ends: 125 [2018-09-30 23:52:59,378 INFO L226 Difference]: Without dead ends: 123 [2018-09-30 23:52:59,379 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-30 23:52:59,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-30 23:52:59,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-09-30 23:52:59,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-09-30 23:52:59,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-09-30 23:52:59,382 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 118 [2018-09-30 23:52:59,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:59,382 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-09-30 23:52:59,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-30 23:52:59,382 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-09-30 23:52:59,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-30 23:52:59,383 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:59,383 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 1, 1, 1, 1, 1, 1] [2018-09-30 23:52:59,383 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:59,383 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:59,384 INFO L82 PathProgramCache]: Analyzing trace with hash -2063310642, now seen corresponding path program 29 times [2018-09-30 23:52:59,384 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:59,384 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:59,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:59,385 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:59,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:59,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:59,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:59,951 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:59,951 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:52:59,960 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:52:59,995 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-09-30 23:52:59,996 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:59,998 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:00,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:00,042 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:00,042 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-30 23:53:00,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 23:53:00,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 23:53:00,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-30 23:53:00,043 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 32 states. [2018-09-30 23:53:00,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:00,152 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-09-30 23:53:00,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 23:53:00,152 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 122 [2018-09-30 23:53:00,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:00,153 INFO L225 Difference]: With dead ends: 129 [2018-09-30 23:53:00,154 INFO L226 Difference]: Without dead ends: 127 [2018-09-30 23:53:00,155 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-30 23:53:00,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-09-30 23:53:00,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-09-30 23:53:00,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-09-30 23:53:00,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2018-09-30 23:53:00,159 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 122 [2018-09-30 23:53:00,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:00,159 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2018-09-30 23:53:00,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 23:53:00,159 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2018-09-30 23:53:00,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-09-30 23:53:00,160 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:00,160 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1] [2018-09-30 23:53:00,160 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:00,161 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:00,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1719888008, now seen corresponding path program 30 times [2018-09-30 23:53:00,161 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:00,161 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:00,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:00,162 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:00,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:00,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:00,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:00,651 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:00,651 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:53:00,661 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:53:00,713 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-30 23:53:00,713 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:00,715 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:00,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:00,760 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:00,761 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-30 23:53:00,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-30 23:53:00,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-30 23:53:00,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 23:53:00,762 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 33 states. [2018-09-30 23:53:00,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:00,838 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-09-30 23:53:00,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 23:53:00,839 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 126 [2018-09-30 23:53:00,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:00,840 INFO L225 Difference]: With dead ends: 133 [2018-09-30 23:53:00,840 INFO L226 Difference]: Without dead ends: 131 [2018-09-30 23:53:00,842 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 23:53:00,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-30 23:53:00,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-09-30 23:53:00,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-30 23:53:00,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-09-30 23:53:00,845 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 126 [2018-09-30 23:53:00,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:00,845 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-09-30 23:53:00,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-30 23:53:00,846 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-09-30 23:53:00,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-09-30 23:53:00,846 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:00,846 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 1, 1, 1, 1, 1, 1] [2018-09-30 23:53:00,847 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:00,847 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:00,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1270519518, now seen corresponding path program 31 times [2018-09-30 23:53:00,847 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:00,847 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:00,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:00,848 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:00,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:00,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:01,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:01,359 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:01,359 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:53:01,367 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:53:01,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:01,408 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:01,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:01,484 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:01,484 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-30 23:53:01,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 23:53:01,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 23:53:01,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 23:53:01,486 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 34 states. [2018-09-30 23:53:01,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:01,653 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-09-30 23:53:01,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 23:53:01,653 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 130 [2018-09-30 23:53:01,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:01,655 INFO L225 Difference]: With dead ends: 137 [2018-09-30 23:53:01,655 INFO L226 Difference]: Without dead ends: 135 [2018-09-30 23:53:01,656 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 23:53:01,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-09-30 23:53:01,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-09-30 23:53:01,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-09-30 23:53:01,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2018-09-30 23:53:01,660 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 130 [2018-09-30 23:53:01,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:01,660 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2018-09-30 23:53:01,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 23:53:01,660 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2018-09-30 23:53:01,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-09-30 23:53:01,661 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:01,661 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 1, 1, 1, 1, 1, 1] [2018-09-30 23:53:01,661 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:01,661 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:01,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1248242228, now seen corresponding path program 32 times [2018-09-30 23:53:01,662 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:01,662 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:01,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:01,662 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:53:01,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:01,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:02,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:02,431 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:02,431 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:53:02,438 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:53:02,466 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:53:02,466 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:02,468 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:02,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:02,510 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:02,511 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-30 23:53:02,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-30 23:53:02,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-30 23:53:02,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 23:53:02,512 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 35 states. [2018-09-30 23:53:02,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:02,640 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-09-30 23:53:02,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 23:53:02,640 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 134 [2018-09-30 23:53:02,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:02,641 INFO L225 Difference]: With dead ends: 141 [2018-09-30 23:53:02,641 INFO L226 Difference]: Without dead ends: 139 [2018-09-30 23:53:02,642 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 23:53:02,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-30 23:53:02,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-09-30 23:53:02,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-09-30 23:53:02,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2018-09-30 23:53:02,646 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 134 [2018-09-30 23:53:02,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:02,646 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2018-09-30 23:53:02,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-30 23:53:02,646 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2018-09-30 23:53:02,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-30 23:53:02,647 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:02,647 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 1, 1, 1, 1, 1, 1] [2018-09-30 23:53:02,647 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:02,648 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:02,648 INFO L82 PathProgramCache]: Analyzing trace with hash -596451978, now seen corresponding path program 33 times [2018-09-30 23:53:02,648 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:02,648 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:02,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:02,649 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:02,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:02,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:03,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:03,530 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:03,531 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:53:03,538 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:53:03,576 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-09-30 23:53:03,576 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:03,578 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:03,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:03,620 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:03,620 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-30 23:53:03,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 23:53:03,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 23:53:03,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 23:53:03,622 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 36 states. [2018-09-30 23:53:03,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:03,689 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-09-30 23:53:03,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 23:53:03,689 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 138 [2018-09-30 23:53:03,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:03,690 INFO L225 Difference]: With dead ends: 145 [2018-09-30 23:53:03,690 INFO L226 Difference]: Without dead ends: 143 [2018-09-30 23:53:03,691 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 23:53:03,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-09-30 23:53:03,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-09-30 23:53:03,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-09-30 23:53:03,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-09-30 23:53:03,694 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 138 [2018-09-30 23:53:03,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:03,695 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-09-30 23:53:03,695 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 23:53:03,695 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-09-30 23:53:03,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-09-30 23:53:03,695 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:03,696 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 1, 1, 1, 1, 1, 1] [2018-09-30 23:53:03,696 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:03,696 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:03,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1720483872, now seen corresponding path program 34 times [2018-09-30 23:53:03,696 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:03,696 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:03,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:03,697 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:03,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:03,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:05,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:05,149 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:05,149 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:53:05,156 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:53:05,202 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:53:05,202 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:05,205 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:05,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:05,260 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:05,261 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-30 23:53:05,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-30 23:53:05,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-30 23:53:05,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 23:53:05,262 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 37 states. [2018-09-30 23:53:05,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:05,336 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-09-30 23:53:05,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 23:53:05,337 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 142 [2018-09-30 23:53:05,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:05,341 INFO L225 Difference]: With dead ends: 149 [2018-09-30 23:53:05,342 INFO L226 Difference]: Without dead ends: 147 [2018-09-30 23:53:05,342 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 23:53:05,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-30 23:53:05,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-09-30 23:53:05,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-09-30 23:53:05,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2018-09-30 23:53:05,345 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 142 [2018-09-30 23:53:05,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:05,346 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2018-09-30 23:53:05,346 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-30 23:53:05,346 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2018-09-30 23:53:05,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-09-30 23:53:05,346 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:05,347 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 1, 1, 1, 1, 1, 1] [2018-09-30 23:53:05,347 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:05,347 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:05,347 INFO L82 PathProgramCache]: Analyzing trace with hash 811646410, now seen corresponding path program 35 times [2018-09-30 23:53:05,347 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:05,347 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:05,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:05,348 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:05,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:05,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:05,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:05,982 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:05,982 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:53:05,991 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:53:06,060 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-09-30 23:53:06,060 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:06,064 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:06,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:06,124 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:06,125 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-30 23:53:06,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 23:53:06,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 23:53:06,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 23:53:06,126 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 38 states. [2018-09-30 23:53:06,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:06,500 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-09-30 23:53:06,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-30 23:53:06,501 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 146 [2018-09-30 23:53:06,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:06,502 INFO L225 Difference]: With dead ends: 153 [2018-09-30 23:53:06,503 INFO L226 Difference]: Without dead ends: 151 [2018-09-30 23:53:06,504 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 23:53:06,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-09-30 23:53:06,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-09-30 23:53:06,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-09-30 23:53:06,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2018-09-30 23:53:06,506 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 146 [2018-09-30 23:53:06,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:06,507 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2018-09-30 23:53:06,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 23:53:06,507 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2018-09-30 23:53:06,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-09-30 23:53:06,508 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:06,508 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 1, 1, 1, 1, 1, 1] [2018-09-30 23:53:06,508 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:06,508 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:06,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1428821620, now seen corresponding path program 36 times [2018-09-30 23:53:06,508 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:06,509 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:06,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:06,509 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:06,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:06,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:07,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:07,217 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:07,217 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:53:07,224 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:53:07,271 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-30 23:53:07,271 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:07,273 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:07,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:07,336 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:07,336 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-30 23:53:07,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-30 23:53:07,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-30 23:53:07,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 23:53:07,338 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 39 states. [2018-09-30 23:53:07,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:07,456 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-09-30 23:53:07,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 23:53:07,456 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 150 [2018-09-30 23:53:07,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:07,458 INFO L225 Difference]: With dead ends: 157 [2018-09-30 23:53:07,458 INFO L226 Difference]: Without dead ends: 155 [2018-09-30 23:53:07,459 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 23:53:07,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-09-30 23:53:07,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-09-30 23:53:07,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-09-30 23:53:07,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2018-09-30 23:53:07,463 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 150 [2018-09-30 23:53:07,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:07,463 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2018-09-30 23:53:07,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-30 23:53:07,463 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2018-09-30 23:53:07,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-09-30 23:53:07,464 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:07,464 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 1, 1, 1, 1, 1, 1] [2018-09-30 23:53:07,464 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:07,465 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:07,465 INFO L82 PathProgramCache]: Analyzing trace with hash -823981538, now seen corresponding path program 37 times [2018-09-30 23:53:07,465 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:07,465 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:07,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:07,466 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:07,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:07,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:08,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:08,733 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:08,733 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:53:08,741 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:53:08,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:08,775 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:08,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:08,836 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:08,836 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-30 23:53:08,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-30 23:53:08,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-30 23:53:08,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 23:53:08,838 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 40 states. [2018-09-30 23:53:09,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:09,189 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-09-30 23:53:09,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-30 23:53:09,190 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 154 [2018-09-30 23:53:09,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:09,191 INFO L225 Difference]: With dead ends: 161 [2018-09-30 23:53:09,191 INFO L226 Difference]: Without dead ends: 159 [2018-09-30 23:53:09,192 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 23:53:09,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-09-30 23:53:09,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-09-30 23:53:09,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-09-30 23:53:09,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2018-09-30 23:53:09,196 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 154 [2018-09-30 23:53:09,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:09,197 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2018-09-30 23:53:09,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-30 23:53:09,197 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2018-09-30 23:53:09,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-09-30 23:53:09,198 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:09,198 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 1, 1, 1, 1, 1, 1] [2018-09-30 23:53:09,198 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:09,198 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:09,198 INFO L82 PathProgramCache]: Analyzing trace with hash 373692616, now seen corresponding path program 38 times [2018-09-30 23:53:09,199 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:09,199 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:09,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:09,201 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:53:09,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:09,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:10,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:10,286 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:10,286 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:53:10,293 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:53:10,324 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:53:10,325 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:10,328 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:10,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:10,396 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:10,396 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-30 23:53:10,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 23:53:10,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 23:53:10,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 23:53:10,398 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand 41 states. [2018-09-30 23:53:11,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:11,346 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-09-30 23:53:11,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 23:53:11,347 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 158 [2018-09-30 23:53:11,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:11,348 INFO L225 Difference]: With dead ends: 165 [2018-09-30 23:53:11,348 INFO L226 Difference]: Without dead ends: 163 [2018-09-30 23:53:11,349 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 23:53:11,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-09-30 23:53:11,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-09-30 23:53:11,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-09-30 23:53:11,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2018-09-30 23:53:11,357 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 158 [2018-09-30 23:53:11,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:11,358 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2018-09-30 23:53:11,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-30 23:53:11,358 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2018-09-30 23:53:11,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-09-30 23:53:11,359 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:11,359 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 1, 1, 1, 1, 1, 1] [2018-09-30 23:53:11,360 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:11,360 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:11,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1026702734, now seen corresponding path program 39 times [2018-09-30 23:53:11,360 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:11,360 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:11,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:11,361 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:11,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:11,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:12,190 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:12,190 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:12,191 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:53:12,199 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:53:12,257 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-09-30 23:53:12,257 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:12,261 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:12,323 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:12,343 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:12,343 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-30 23:53:12,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-30 23:53:12,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-30 23:53:12,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 23:53:12,344 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 42 states. [2018-09-30 23:53:12,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:12,517 INFO L93 Difference]: Finished difference Result 169 states and 169 transitions. [2018-09-30 23:53:12,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-30 23:53:12,517 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 162 [2018-09-30 23:53:12,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:12,522 INFO L225 Difference]: With dead ends: 169 [2018-09-30 23:53:12,522 INFO L226 Difference]: Without dead ends: 167 [2018-09-30 23:53:12,523 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 23:53:12,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-09-30 23:53:12,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-09-30 23:53:12,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-09-30 23:53:12,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2018-09-30 23:53:12,526 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 162 [2018-09-30 23:53:12,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:12,527 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2018-09-30 23:53:12,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-30 23:53:12,527 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2018-09-30 23:53:12,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-09-30 23:53:12,528 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:12,528 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 1, 1, 1, 1, 1, 1] [2018-09-30 23:53:12,528 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:12,529 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:12,529 INFO L82 PathProgramCache]: Analyzing trace with hash 716474140, now seen corresponding path program 40 times [2018-09-30 23:53:12,529 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:12,529 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:12,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:12,530 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:12,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:12,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:13,573 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:13,573 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:13,574 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:53:13,581 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:53:13,617 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:53:13,617 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:13,620 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:13,646 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:13,666 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:13,667 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-30 23:53:13,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-30 23:53:13,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-30 23:53:13,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 23:53:13,668 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 43 states. [2018-09-30 23:53:13,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:13,796 INFO L93 Difference]: Finished difference Result 173 states and 173 transitions. [2018-09-30 23:53:13,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 23:53:13,797 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 166 [2018-09-30 23:53:13,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:13,798 INFO L225 Difference]: With dead ends: 173 [2018-09-30 23:53:13,798 INFO L226 Difference]: Without dead ends: 171 [2018-09-30 23:53:13,800 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 23:53:13,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-09-30 23:53:13,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-09-30 23:53:13,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-09-30 23:53:13,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2018-09-30 23:53:13,803 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 166 [2018-09-30 23:53:13,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:13,803 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2018-09-30 23:53:13,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-30 23:53:13,803 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2018-09-30 23:53:13,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-09-30 23:53:13,804 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:13,804 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 1, 1, 1, 1, 1, 1] [2018-09-30 23:53:13,805 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:13,805 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:13,805 INFO L82 PathProgramCache]: Analyzing trace with hash 49604294, now seen corresponding path program 41 times [2018-09-30 23:53:13,805 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:13,805 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:13,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:13,806 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:13,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:13,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:14,701 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:14,702 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:14,702 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:53:14,710 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:53:14,771 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-09-30 23:53:14,771 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:14,774 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:14,805 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:14,836 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:14,836 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-30 23:53:14,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-30 23:53:14,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-30 23:53:14,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 23:53:14,838 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand 44 states. [2018-09-30 23:53:15,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:15,311 INFO L93 Difference]: Finished difference Result 177 states and 177 transitions. [2018-09-30 23:53:15,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-30 23:53:15,311 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 170 [2018-09-30 23:53:15,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:15,312 INFO L225 Difference]: With dead ends: 177 [2018-09-30 23:53:15,313 INFO L226 Difference]: Without dead ends: 175 [2018-09-30 23:53:15,313 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 23:53:15,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-09-30 23:53:15,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-09-30 23:53:15,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-09-30 23:53:15,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2018-09-30 23:53:15,317 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 170 [2018-09-30 23:53:15,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:15,318 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2018-09-30 23:53:15,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-30 23:53:15,318 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2018-09-30 23:53:15,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-09-30 23:53:15,319 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:15,319 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 1, 1, 1, 1, 1, 1] [2018-09-30 23:53:15,319 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:15,319 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:15,320 INFO L82 PathProgramCache]: Analyzing trace with hash -11968144, now seen corresponding path program 42 times [2018-09-30 23:53:15,320 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:15,320 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:15,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:15,321 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:15,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:15,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:16,449 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:16,449 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:16,449 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:53:16,458 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:53:16,510 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-30 23:53:16,510 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:16,514 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:16,553 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:16,584 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:16,584 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-30 23:53:16,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-30 23:53:16,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-30 23:53:16,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 23:53:16,586 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand 45 states. [2018-09-30 23:53:16,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:16,720 INFO L93 Difference]: Finished difference Result 181 states and 181 transitions. [2018-09-30 23:53:16,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-30 23:53:16,721 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 174 [2018-09-30 23:53:16,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:16,723 INFO L225 Difference]: With dead ends: 181 [2018-09-30 23:53:16,723 INFO L226 Difference]: Without dead ends: 179 [2018-09-30 23:53:16,724 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 23:53:16,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-09-30 23:53:16,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-09-30 23:53:16,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-09-30 23:53:16,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2018-09-30 23:53:16,729 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 174 [2018-09-30 23:53:16,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:16,729 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2018-09-30 23:53:16,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-30 23:53:16,730 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2018-09-30 23:53:16,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-09-30 23:53:16,731 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:16,731 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 1, 1, 1, 1, 1, 1] [2018-09-30 23:53:16,731 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:16,731 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:16,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1915516698, now seen corresponding path program 43 times [2018-09-30 23:53:16,732 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:16,732 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:16,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:16,733 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:16,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:16,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:18,941 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:18,941 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:18,941 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:53:18,950 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:53:18,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:18,990 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:19,022 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:19,042 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:19,043 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-30 23:53:19,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-30 23:53:19,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-30 23:53:19,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 23:53:19,044 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand 46 states. [2018-09-30 23:53:19,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:19,286 INFO L93 Difference]: Finished difference Result 185 states and 185 transitions. [2018-09-30 23:53:19,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-30 23:53:19,287 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 178 [2018-09-30 23:53:19,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:19,288 INFO L225 Difference]: With dead ends: 185 [2018-09-30 23:53:19,288 INFO L226 Difference]: Without dead ends: 183 [2018-09-30 23:53:19,289 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 23:53:19,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-09-30 23:53:19,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2018-09-30 23:53:19,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-09-30 23:53:19,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2018-09-30 23:53:19,292 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 178 [2018-09-30 23:53:19,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:19,292 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2018-09-30 23:53:19,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-30 23:53:19,292 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2018-09-30 23:53:19,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-09-30 23:53:19,293 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:19,293 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 1, 1, 1, 1, 1, 1] [2018-09-30 23:53:19,293 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:19,293 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:19,293 INFO L82 PathProgramCache]: Analyzing trace with hash -321345596, now seen corresponding path program 44 times [2018-09-30 23:53:19,293 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:19,293 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:19,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:19,294 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:53:19,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:19,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:20,962 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:20,963 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:20,963 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:53:20,976 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:53:21,013 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:53:21,013 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:21,016 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:21,042 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:21,062 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:21,063 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-30 23:53:21,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-30 23:53:21,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-30 23:53:21,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 23:53:21,064 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand 47 states. [2018-09-30 23:53:21,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:21,155 INFO L93 Difference]: Finished difference Result 189 states and 189 transitions. [2018-09-30 23:53:21,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 23:53:21,155 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 182 [2018-09-30 23:53:21,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:21,157 INFO L225 Difference]: With dead ends: 189 [2018-09-30 23:53:21,157 INFO L226 Difference]: Without dead ends: 187 [2018-09-30 23:53:21,157 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 23:53:21,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-09-30 23:53:21,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-09-30 23:53:21,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-09-30 23:53:21,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2018-09-30 23:53:21,161 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 182 [2018-09-30 23:53:21,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:21,162 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2018-09-30 23:53:21,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-30 23:53:21,162 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2018-09-30 23:53:21,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-09-30 23:53:21,163 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:21,163 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 1, 1, 1, 1, 1, 1] [2018-09-30 23:53:21,163 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:21,164 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:21,164 INFO L82 PathProgramCache]: Analyzing trace with hash -548899986, now seen corresponding path program 45 times [2018-09-30 23:53:21,164 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:21,164 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:21,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:21,165 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:21,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:21,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:22,473 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:22,473 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:22,473 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:53:22,481 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:53:22,538 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-09-30 23:53:22,538 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:22,541 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:22,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:22,602 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:22,602 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-30 23:53:22,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 23:53:22,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 23:53:22,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 23:53:22,603 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand 48 states. [2018-09-30 23:53:22,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:22,711 INFO L93 Difference]: Finished difference Result 193 states and 193 transitions. [2018-09-30 23:53:22,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-30 23:53:22,711 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 186 [2018-09-30 23:53:22,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:22,713 INFO L225 Difference]: With dead ends: 193 [2018-09-30 23:53:22,713 INFO L226 Difference]: Without dead ends: 191 [2018-09-30 23:53:22,714 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 23:53:22,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-09-30 23:53:22,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-09-30 23:53:22,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-09-30 23:53:22,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 191 transitions. [2018-09-30 23:53:22,718 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 191 transitions. Word has length 186 [2018-09-30 23:53:22,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:22,718 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 191 transitions. [2018-09-30 23:53:22,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 23:53:22,718 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 191 transitions. [2018-09-30 23:53:22,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-09-30 23:53:22,719 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:22,719 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 1, 1, 1, 1, 1, 1] [2018-09-30 23:53:22,720 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:22,720 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:22,720 INFO L82 PathProgramCache]: Analyzing trace with hash 943086104, now seen corresponding path program 46 times [2018-09-30 23:53:22,720 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:22,720 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:22,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:22,721 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:22,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:22,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:24,214 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:24,215 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:24,215 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:53:24,223 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:53:24,264 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:53:24,265 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:24,268 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:24,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:24,351 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:24,352 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-30 23:53:24,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-30 23:53:24,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-30 23:53:24,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 23:53:24,353 INFO L87 Difference]: Start difference. First operand 191 states and 191 transitions. Second operand 49 states. [2018-09-30 23:53:24,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:24,659 INFO L93 Difference]: Finished difference Result 197 states and 197 transitions. [2018-09-30 23:53:24,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 23:53:24,659 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 190 [2018-09-30 23:53:24,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:24,661 INFO L225 Difference]: With dead ends: 197 [2018-09-30 23:53:24,661 INFO L226 Difference]: Without dead ends: 195 [2018-09-30 23:53:24,662 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 23:53:24,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-09-30 23:53:24,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2018-09-30 23:53:24,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-09-30 23:53:24,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2018-09-30 23:53:24,665 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 190 [2018-09-30 23:53:24,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:24,666 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2018-09-30 23:53:24,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-30 23:53:24,666 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2018-09-30 23:53:24,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-09-30 23:53:24,667 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:24,667 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 1, 1, 1, 1, 1, 1] [2018-09-30 23:53:24,667 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:24,667 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:24,668 INFO L82 PathProgramCache]: Analyzing trace with hash 85777346, now seen corresponding path program 47 times [2018-09-30 23:53:24,668 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:24,668 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:24,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:24,669 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:24,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:24,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:25,601 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:25,601 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:25,602 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:53:25,611 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:53:25,674 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-09-30 23:53:25,674 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:25,678 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:25,727 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:25,760 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:25,760 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-30 23:53:25,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 23:53:25,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 23:53:25,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 23:53:25,762 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand 50 states. [2018-09-30 23:53:25,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:25,989 INFO L93 Difference]: Finished difference Result 201 states and 201 transitions. [2018-09-30 23:53:25,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-30 23:53:25,989 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 194 [2018-09-30 23:53:25,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:25,991 INFO L225 Difference]: With dead ends: 201 [2018-09-30 23:53:25,991 INFO L226 Difference]: Without dead ends: 199 [2018-09-30 23:53:25,992 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 23:53:25,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-09-30 23:53:25,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2018-09-30 23:53:25,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-09-30 23:53:25,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 199 transitions. [2018-09-30 23:53:25,995 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 199 transitions. Word has length 194 [2018-09-30 23:53:25,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:25,996 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 199 transitions. [2018-09-30 23:53:25,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 23:53:25,996 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 199 transitions. [2018-09-30 23:53:25,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-09-30 23:53:25,997 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:25,997 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 1, 1, 1, 1, 1, 1] [2018-09-30 23:53:25,997 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:25,997 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:25,998 INFO L82 PathProgramCache]: Analyzing trace with hash 305559660, now seen corresponding path program 48 times [2018-09-30 23:53:25,998 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:25,998 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:25,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:25,998 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:25,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:26,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:27,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:27,265 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:27,266 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:53:27,273 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:53:27,338 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-30 23:53:27,339 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:27,341 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:27,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:27,403 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:27,403 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-30 23:53:27,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-30 23:53:27,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-30 23:53:27,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 23:53:27,404 INFO L87 Difference]: Start difference. First operand 199 states and 199 transitions. Second operand 51 states. [2018-09-30 23:53:27,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:27,520 INFO L93 Difference]: Finished difference Result 205 states and 205 transitions. [2018-09-30 23:53:27,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 23:53:27,520 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 198 [2018-09-30 23:53:27,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:27,522 INFO L225 Difference]: With dead ends: 205 [2018-09-30 23:53:27,522 INFO L226 Difference]: Without dead ends: 203 [2018-09-30 23:53:27,523 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 23:53:27,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-09-30 23:53:27,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2018-09-30 23:53:27,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-09-30 23:53:27,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 203 transitions. [2018-09-30 23:53:27,526 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 203 transitions. Word has length 198 [2018-09-30 23:53:27,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:27,526 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 203 transitions. [2018-09-30 23:53:27,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-30 23:53:27,527 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 203 transitions. [2018-09-30 23:53:27,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-09-30 23:53:27,528 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:27,528 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 1, 1, 1, 1, 1, 1] [2018-09-30 23:53:27,528 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:27,528 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:27,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1971474410, now seen corresponding path program 49 times [2018-09-30 23:53:27,529 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:27,529 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:27,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:27,530 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:27,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:27,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:28,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:28,884 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:28,884 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:53:28,891 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:53:28,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:28,936 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:28,972 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:28,992 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:28,992 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-30 23:53:28,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-30 23:53:28,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-30 23:53:28,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 23:53:28,993 INFO L87 Difference]: Start difference. First operand 203 states and 203 transitions. Second operand 52 states. [2018-09-30 23:53:29,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:29,098 INFO L93 Difference]: Finished difference Result 209 states and 209 transitions. [2018-09-30 23:53:29,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-30 23:53:29,098 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 202 [2018-09-30 23:53:29,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:29,100 INFO L225 Difference]: With dead ends: 209 [2018-09-30 23:53:29,100 INFO L226 Difference]: Without dead ends: 207 [2018-09-30 23:53:29,101 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 23:53:29,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-09-30 23:53:29,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2018-09-30 23:53:29,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2018-09-30 23:53:29,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 207 transitions. [2018-09-30 23:53:29,104 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 207 transitions. Word has length 202 [2018-09-30 23:53:29,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:29,104 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 207 transitions. [2018-09-30 23:53:29,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-30 23:53:29,105 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 207 transitions. [2018-09-30 23:53:29,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-09-30 23:53:29,106 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:29,106 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 1, 1, 1, 1, 1, 1] [2018-09-30 23:53:29,106 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:29,106 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:29,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1750269248, now seen corresponding path program 50 times [2018-09-30 23:53:29,107 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:29,107 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:29,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:29,108 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:53:29,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:29,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:30,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:30,319 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:30,319 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:53:30,328 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:53:30,377 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:53:30,378 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:30,381 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:30,436 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:30,470 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:30,471 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-30 23:53:30,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-30 23:53:30,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-30 23:53:30,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 23:53:30,473 INFO L87 Difference]: Start difference. First operand 207 states and 207 transitions. Second operand 53 states. [2018-09-30 23:53:30,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:30,884 INFO L93 Difference]: Finished difference Result 213 states and 213 transitions. [2018-09-30 23:53:30,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-30 23:53:30,885 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 206 [2018-09-30 23:53:30,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:30,887 INFO L225 Difference]: With dead ends: 213 [2018-09-30 23:53:30,887 INFO L226 Difference]: Without dead ends: 211 [2018-09-30 23:53:30,888 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 23:53:30,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-09-30 23:53:30,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2018-09-30 23:53:30,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-09-30 23:53:30,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 211 transitions. [2018-09-30 23:53:30,891 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 211 transitions. Word has length 206 [2018-09-30 23:53:30,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:30,891 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 211 transitions. [2018-09-30 23:53:30,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-30 23:53:30,891 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 211 transitions. [2018-09-30 23:53:30,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-09-30 23:53:30,892 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:30,893 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 1, 1, 1, 1, 1, 1] [2018-09-30 23:53:30,893 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:30,893 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:30,893 INFO L82 PathProgramCache]: Analyzing trace with hash 37679210, now seen corresponding path program 51 times [2018-09-30 23:53:30,893 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:30,893 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:30,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:30,894 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:30,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:30,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:32,076 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:32,076 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:32,076 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:53:32,084 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:53:32,177 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-09-30 23:53:32,178 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:32,181 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:32,232 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:32,258 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:32,258 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-30 23:53:32,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-30 23:53:32,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-30 23:53:32,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 23:53:32,260 INFO L87 Difference]: Start difference. First operand 211 states and 211 transitions. Second operand 54 states. [2018-09-30 23:53:32,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:32,397 INFO L93 Difference]: Finished difference Result 217 states and 217 transitions. [2018-09-30 23:53:32,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-30 23:53:32,397 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 210 [2018-09-30 23:53:32,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:32,399 INFO L225 Difference]: With dead ends: 217 [2018-09-30 23:53:32,399 INFO L226 Difference]: Without dead ends: 215 [2018-09-30 23:53:32,399 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 23:53:32,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2018-09-30 23:53:32,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2018-09-30 23:53:32,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2018-09-30 23:53:32,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 215 transitions. [2018-09-30 23:53:32,402 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 215 transitions. Word has length 210 [2018-09-30 23:53:32,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:32,403 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 215 transitions. [2018-09-30 23:53:32,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-30 23:53:32,403 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 215 transitions. [2018-09-30 23:53:32,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2018-09-30 23:53:32,404 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:32,404 INFO L375 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 1, 1, 1, 1, 1, 1] [2018-09-30 23:53:32,404 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:32,404 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:32,405 INFO L82 PathProgramCache]: Analyzing trace with hash -781321964, now seen corresponding path program 52 times [2018-09-30 23:53:32,405 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:32,405 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:32,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:32,406 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:32,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:32,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:33,549 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:33,549 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:33,550 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:53:33,558 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:53:33,600 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:53:33,601 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:33,604 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:33,658 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:33,689 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:33,690 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-30 23:53:33,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-30 23:53:33,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-30 23:53:33,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 23:53:33,691 INFO L87 Difference]: Start difference. First operand 215 states and 215 transitions. Second operand 55 states. [2018-09-30 23:53:33,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:33,889 INFO L93 Difference]: Finished difference Result 221 states and 221 transitions. [2018-09-30 23:53:33,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 23:53:33,889 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 214 [2018-09-30 23:53:33,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:33,891 INFO L225 Difference]: With dead ends: 221 [2018-09-30 23:53:33,891 INFO L226 Difference]: Without dead ends: 219 [2018-09-30 23:53:33,892 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 23:53:33,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-09-30 23:53:33,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2018-09-30 23:53:33,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-09-30 23:53:33,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 219 transitions. [2018-09-30 23:53:33,896 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 219 transitions. Word has length 214 [2018-09-30 23:53:33,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:33,897 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 219 transitions. [2018-09-30 23:53:33,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-30 23:53:33,897 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 219 transitions. [2018-09-30 23:53:33,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-09-30 23:53:33,898 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:33,898 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 1, 1, 1, 1, 1, 1] [2018-09-30 23:53:33,898 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:33,898 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:33,899 INFO L82 PathProgramCache]: Analyzing trace with hash -348873538, now seen corresponding path program 53 times [2018-09-30 23:53:33,899 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:33,899 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:33,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:33,900 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:33,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:33,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:35,334 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:35,334 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:35,334 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:53:35,342 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:53:35,424 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-09-30 23:53:35,424 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:35,428 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:35,471 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:35,492 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:35,492 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-30 23:53:35,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-30 23:53:35,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-30 23:53:35,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 23:53:35,494 INFO L87 Difference]: Start difference. First operand 219 states and 219 transitions. Second operand 56 states. [2018-09-30 23:53:35,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:35,587 INFO L93 Difference]: Finished difference Result 225 states and 225 transitions. [2018-09-30 23:53:35,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-30 23:53:35,588 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 218 [2018-09-30 23:53:35,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:35,589 INFO L225 Difference]: With dead ends: 225 [2018-09-30 23:53:35,590 INFO L226 Difference]: Without dead ends: 223 [2018-09-30 23:53:35,590 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 23:53:35,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-09-30 23:53:35,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2018-09-30 23:53:35,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2018-09-30 23:53:35,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 223 transitions. [2018-09-30 23:53:35,593 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 223 transitions. Word has length 218 [2018-09-30 23:53:35,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:35,593 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 223 transitions. [2018-09-30 23:53:35,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-30 23:53:35,593 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 223 transitions. [2018-09-30 23:53:35,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-09-30 23:53:35,594 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:35,594 INFO L375 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 1, 1, 1, 1, 1, 1] [2018-09-30 23:53:35,594 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:35,595 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:35,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1269998744, now seen corresponding path program 54 times [2018-09-30 23:53:35,595 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:35,595 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:35,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:35,596 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:35,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:35,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:36,851 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:36,852 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:36,852 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 [2018-09-30 23:53:36,859 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:53:36,930 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-09-30 23:53:36,931 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:36,934 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:36,991 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:37,026 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:37,027 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-30 23:53:37,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-30 23:53:37,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-30 23:53:37,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-30 23:53:37,029 INFO L87 Difference]: Start difference. First operand 223 states and 223 transitions. Second operand 57 states. [2018-09-30 23:53:37,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:37,208 INFO L93 Difference]: Finished difference Result 229 states and 229 transitions. [2018-09-30 23:53:37,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-30 23:53:37,208 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 222 [2018-09-30 23:53:37,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:37,210 INFO L225 Difference]: With dead ends: 229 [2018-09-30 23:53:37,210 INFO L226 Difference]: Without dead ends: 227 [2018-09-30 23:53:37,211 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-30 23:53:37,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2018-09-30 23:53:37,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2018-09-30 23:53:37,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2018-09-30 23:53:37,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 227 transitions. [2018-09-30 23:53:37,214 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 227 transitions. Word has length 222 [2018-09-30 23:53:37,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:37,215 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 227 transitions. [2018-09-30 23:53:37,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-30 23:53:37,215 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 227 transitions. [2018-09-30 23:53:37,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2018-09-30 23:53:37,216 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:37,216 INFO L375 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 1, 1, 1, 1, 1, 1] [2018-09-30 23:53:37,216 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:37,216 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:37,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1338854126, now seen corresponding path program 55 times [2018-09-30 23:53:37,217 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:37,217 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:37,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:37,218 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:37,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:37,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:38,449 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:38,450 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:38,450 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:53:38,460 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:53:38,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:38,508 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:38,565 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:38,597 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:38,598 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-30 23:53:38,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-30 23:53:38,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-30 23:53:38,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 23:53:38,599 INFO L87 Difference]: Start difference. First operand 227 states and 227 transitions. Second operand 58 states. [2018-09-30 23:53:38,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:38,780 INFO L93 Difference]: Finished difference Result 233 states and 233 transitions. [2018-09-30 23:53:38,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-30 23:53:38,781 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 226 [2018-09-30 23:53:38,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:38,782 INFO L225 Difference]: With dead ends: 233 [2018-09-30 23:53:38,783 INFO L226 Difference]: Without dead ends: 231 [2018-09-30 23:53:38,783 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 23:53:38,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2018-09-30 23:53:38,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2018-09-30 23:53:38,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2018-09-30 23:53:38,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 231 transitions. [2018-09-30 23:53:38,787 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 231 transitions. Word has length 226 [2018-09-30 23:53:38,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:38,787 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 231 transitions. [2018-09-30 23:53:38,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-30 23:53:38,787 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 231 transitions. [2018-09-30 23:53:38,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2018-09-30 23:53:38,788 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:38,788 INFO L375 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 1, 1, 1, 1, 1, 1] [2018-09-30 23:53:38,789 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:38,789 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:38,789 INFO L82 PathProgramCache]: Analyzing trace with hash 555690428, now seen corresponding path program 56 times [2018-09-30 23:53:38,789 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:38,789 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:38,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:38,790 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:53:38,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:38,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:40,382 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:40,383 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:40,383 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:53:40,390 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:53:40,445 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:53:40,446 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:40,448 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:40,510 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:40,539 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:40,540 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-30 23:53:40,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-30 23:53:40,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-30 23:53:40,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 23:53:40,541 INFO L87 Difference]: Start difference. First operand 231 states and 231 transitions. Second operand 59 states. [2018-09-30 23:53:41,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:41,697 INFO L93 Difference]: Finished difference Result 237 states and 237 transitions. [2018-09-30 23:53:41,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-30 23:53:41,698 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 230 [2018-09-30 23:53:41,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:41,699 INFO L225 Difference]: With dead ends: 237 [2018-09-30 23:53:41,699 INFO L226 Difference]: Without dead ends: 235 [2018-09-30 23:53:41,700 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 23:53:41,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2018-09-30 23:53:41,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2018-09-30 23:53:41,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2018-09-30 23:53:41,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 235 transitions. [2018-09-30 23:53:41,703 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 235 transitions. Word has length 230 [2018-09-30 23:53:41,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:41,703 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 235 transitions. [2018-09-30 23:53:41,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-30 23:53:41,703 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 235 transitions. [2018-09-30 23:53:41,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2018-09-30 23:53:41,704 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:41,704 INFO L375 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 1, 1, 1, 1, 1, 1] [2018-09-30 23:53:41,704 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:41,704 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:41,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1475528346, now seen corresponding path program 57 times [2018-09-30 23:53:41,705 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:41,705 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:41,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:41,705 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:41,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:41,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:42,964 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 0 proven. 6441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:42,964 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:42,964 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 [2018-09-30 23:53:42,971 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:53:43,052 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-09-30 23:53:43,053 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:43,055 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:43,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 0 proven. 6441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:43,157 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:43,157 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-30 23:53:43,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-30 23:53:43,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-30 23:53:43,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 23:53:43,159 INFO L87 Difference]: Start difference. First operand 235 states and 235 transitions. Second operand 60 states. [2018-09-30 23:53:43,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:43,370 INFO L93 Difference]: Finished difference Result 241 states and 241 transitions. [2018-09-30 23:53:43,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-30 23:53:43,371 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 234 [2018-09-30 23:53:43,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:43,372 INFO L225 Difference]: With dead ends: 241 [2018-09-30 23:53:43,372 INFO L226 Difference]: Without dead ends: 239 [2018-09-30 23:53:43,373 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 23:53:43,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2018-09-30 23:53:43,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2018-09-30 23:53:43,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2018-09-30 23:53:43,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 239 transitions. [2018-09-30 23:53:43,376 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 239 transitions. Word has length 234 [2018-09-30 23:53:43,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:43,376 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 239 transitions. [2018-09-30 23:53:43,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-30 23:53:43,376 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 239 transitions. [2018-09-30 23:53:43,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-09-30 23:53:43,377 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:43,377 INFO L375 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 1, 1, 1, 1, 1, 1] [2018-09-30 23:53:43,377 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:43,378 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:43,378 INFO L82 PathProgramCache]: Analyzing trace with hash -457743344, now seen corresponding path program 58 times [2018-09-30 23:53:43,378 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:43,378 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:43,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:43,378 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:43,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:43,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:45,016 INFO L134 CoverageAnalysis]: Checked inductivity of 6670 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:45,017 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:45,017 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 [2018-09-30 23:53:45,026 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:53:45,089 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:53:45,090 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:45,094 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:45,159 INFO L134 CoverageAnalysis]: Checked inductivity of 6670 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:45,189 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:45,190 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-30 23:53:45,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-30 23:53:45,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-30 23:53:45,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-30 23:53:45,191 INFO L87 Difference]: Start difference. First operand 239 states and 239 transitions. Second operand 61 states. [2018-09-30 23:53:45,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:45,398 INFO L93 Difference]: Finished difference Result 245 states and 245 transitions. [2018-09-30 23:53:45,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-30 23:53:45,401 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 238 [2018-09-30 23:53:45,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:45,402 INFO L225 Difference]: With dead ends: 245 [2018-09-30 23:53:45,402 INFO L226 Difference]: Without dead ends: 243 [2018-09-30 23:53:45,402 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-30 23:53:45,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-09-30 23:53:45,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 243. [2018-09-30 23:53:45,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2018-09-30 23:53:45,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 243 transitions. [2018-09-30 23:53:45,405 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 243 transitions. Word has length 238 [2018-09-30 23:53:45,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:45,406 INFO L480 AbstractCegarLoop]: Abstraction has 243 states and 243 transitions. [2018-09-30 23:53:45,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-30 23:53:45,406 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 243 transitions. [2018-09-30 23:53:45,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2018-09-30 23:53:45,407 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:45,407 INFO L375 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 1, 1, 1, 1, 1, 1] [2018-09-30 23:53:45,408 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:45,408 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:45,408 INFO L82 PathProgramCache]: Analyzing trace with hash 362293690, now seen corresponding path program 59 times [2018-09-30 23:53:45,408 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:45,408 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:45,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:45,409 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:45,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:45,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:46,779 INFO L134 CoverageAnalysis]: Checked inductivity of 6903 backedges. 0 proven. 6903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:46,779 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:46,779 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 [2018-09-30 23:53:46,786 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:53:46,873 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-09-30 23:53:46,873 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:46,876 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:46,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6903 backedges. 0 proven. 6903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:46,946 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:46,946 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-30 23:53:46,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-30 23:53:46,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-30 23:53:46,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 23:53:46,947 INFO L87 Difference]: Start difference. First operand 243 states and 243 transitions. Second operand 62 states. [2018-09-30 23:53:47,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:47,104 INFO L93 Difference]: Finished difference Result 249 states and 249 transitions. [2018-09-30 23:53:47,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-30 23:53:47,105 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 242 [2018-09-30 23:53:47,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:47,106 INFO L225 Difference]: With dead ends: 249 [2018-09-30 23:53:47,106 INFO L226 Difference]: Without dead ends: 247 [2018-09-30 23:53:47,107 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 23:53:47,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2018-09-30 23:53:47,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2018-09-30 23:53:47,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2018-09-30 23:53:47,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 247 transitions. [2018-09-30 23:53:47,111 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 247 transitions. Word has length 242 [2018-09-30 23:53:47,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:47,111 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 247 transitions. [2018-09-30 23:53:47,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-30 23:53:47,111 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 247 transitions. [2018-09-30 23:53:47,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2018-09-30 23:53:47,113 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:47,113 INFO L375 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 1, 1, 1, 1, 1, 1] [2018-09-30 23:53:47,113 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:47,113 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:47,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1209398684, now seen corresponding path program 60 times [2018-09-30 23:53:47,113 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:47,114 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:47,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:47,114 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:47,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:47,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:48,547 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:48,548 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:48,548 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 [2018-09-30 23:53:48,555 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:53:48,635 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-09-30 23:53:48,635 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:48,638 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:48,708 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:48,738 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:48,738 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-09-30 23:53:48,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-30 23:53:48,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-30 23:53:48,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-30 23:53:48,740 INFO L87 Difference]: Start difference. First operand 247 states and 247 transitions. Second operand 63 states. [2018-09-30 23:53:48,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:48,899 INFO L93 Difference]: Finished difference Result 253 states and 253 transitions. [2018-09-30 23:53:48,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-30 23:53:48,900 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 246 [2018-09-30 23:53:48,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:48,901 INFO L225 Difference]: With dead ends: 253 [2018-09-30 23:53:48,902 INFO L226 Difference]: Without dead ends: 251 [2018-09-30 23:53:48,902 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-30 23:53:48,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2018-09-30 23:53:48,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2018-09-30 23:53:48,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2018-09-30 23:53:48,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 251 transitions. [2018-09-30 23:53:48,905 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 251 transitions. Word has length 246 [2018-09-30 23:53:48,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:48,905 INFO L480 AbstractCegarLoop]: Abstraction has 251 states and 251 transitions. [2018-09-30 23:53:48,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-30 23:53:48,905 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 251 transitions. [2018-09-30 23:53:48,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2018-09-30 23:53:48,906 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:48,906 INFO L375 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 1, 1, 1, 1, 1, 1] [2018-09-30 23:53:48,907 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:48,907 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:48,907 INFO L82 PathProgramCache]: Analyzing trace with hash 665290254, now seen corresponding path program 61 times [2018-09-30 23:53:48,907 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:48,907 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:48,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:48,908 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:48,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:48,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:50,724 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 7381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:50,724 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:50,725 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 [2018-09-30 23:53:50,733 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:53:50,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:50,784 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:50,852 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 7381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:50,883 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:50,883 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-30 23:53:50,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-30 23:53:50,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-30 23:53:50,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 23:53:50,885 INFO L87 Difference]: Start difference. First operand 251 states and 251 transitions. Second operand 64 states. [2018-09-30 23:53:51,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:51,045 INFO L93 Difference]: Finished difference Result 257 states and 257 transitions. [2018-09-30 23:53:51,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-30 23:53:51,046 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 250 [2018-09-30 23:53:51,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:51,047 INFO L225 Difference]: With dead ends: 257 [2018-09-30 23:53:51,047 INFO L226 Difference]: Without dead ends: 255 [2018-09-30 23:53:51,048 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 23:53:51,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2018-09-30 23:53:51,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 255. [2018-09-30 23:53:51,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2018-09-30 23:53:51,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 255 transitions. [2018-09-30 23:53:51,050 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 255 transitions. Word has length 250 [2018-09-30 23:53:51,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:51,051 INFO L480 AbstractCegarLoop]: Abstraction has 255 states and 255 transitions. [2018-09-30 23:53:51,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-30 23:53:51,051 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 255 transitions. [2018-09-30 23:53:51,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2018-09-30 23:53:51,052 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:51,052 INFO L375 BasicCegarLoop]: trace histogram [62, 62, 62, 62, 1, 1, 1, 1, 1, 1] [2018-09-30 23:53:51,053 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:51,053 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:51,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1066081464, now seen corresponding path program 62 times [2018-09-30 23:53:51,053 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:51,053 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:51,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:51,054 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:53:51,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:51,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:52,689 INFO L134 CoverageAnalysis]: Checked inductivity of 7626 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:52,690 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:52,690 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 [2018-09-30 23:53:52,700 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:53:52,749 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:53:52,749 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:52,752 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:52,803 INFO L134 CoverageAnalysis]: Checked inductivity of 7626 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:52,823 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:52,824 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-30 23:53:52,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-30 23:53:52,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-30 23:53:52,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 23:53:52,825 INFO L87 Difference]: Start difference. First operand 255 states and 255 transitions. Second operand 65 states. [2018-09-30 23:53:52,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:52,971 INFO L93 Difference]: Finished difference Result 261 states and 261 transitions. [2018-09-30 23:53:52,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 23:53:52,971 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 254 [2018-09-30 23:53:52,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:52,973 INFO L225 Difference]: With dead ends: 261 [2018-09-30 23:53:52,973 INFO L226 Difference]: Without dead ends: 259 [2018-09-30 23:53:52,973 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 23:53:52,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2018-09-30 23:53:52,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2018-09-30 23:53:52,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2018-09-30 23:53:52,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 259 transitions. [2018-09-30 23:53:52,976 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 259 transitions. Word has length 254 [2018-09-30 23:53:52,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:52,976 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 259 transitions. [2018-09-30 23:53:52,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-30 23:53:52,976 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 259 transitions. [2018-09-30 23:53:52,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-09-30 23:53:52,978 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:52,978 INFO L375 BasicCegarLoop]: trace histogram [63, 63, 63, 63, 1, 1, 1, 1, 1, 1] [2018-09-30 23:53:52,978 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:52,978 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:52,978 INFO L82 PathProgramCache]: Analyzing trace with hash -116437406, now seen corresponding path program 63 times [2018-09-30 23:53:52,978 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:52,978 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:52,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:52,979 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:52,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:52,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:55,006 INFO L134 CoverageAnalysis]: Checked inductivity of 7875 backedges. 0 proven. 7875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:55,007 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:55,007 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 [2018-09-30 23:53:55,015 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:53:55,099 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-09-30 23:53:55,100 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:55,103 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:55,154 INFO L134 CoverageAnalysis]: Checked inductivity of 7875 backedges. 0 proven. 7875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:55,174 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:55,174 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-30 23:53:55,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-30 23:53:55,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-30 23:53:55,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 23:53:55,176 INFO L87 Difference]: Start difference. First operand 259 states and 259 transitions. Second operand 66 states. [2018-09-30 23:53:55,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:55,383 INFO L93 Difference]: Finished difference Result 265 states and 265 transitions. [2018-09-30 23:53:55,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-30 23:53:55,384 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 258 [2018-09-30 23:53:55,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:55,385 INFO L225 Difference]: With dead ends: 265 [2018-09-30 23:53:55,385 INFO L226 Difference]: Without dead ends: 263 [2018-09-30 23:53:55,386 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 23:53:55,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2018-09-30 23:53:55,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2018-09-30 23:53:55,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2018-09-30 23:53:55,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 263 transitions. [2018-09-30 23:53:55,390 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 263 transitions. Word has length 258 [2018-09-30 23:53:55,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:55,390 INFO L480 AbstractCegarLoop]: Abstraction has 263 states and 263 transitions. [2018-09-30 23:53:55,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-30 23:53:55,390 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 263 transitions. [2018-09-30 23:53:55,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2018-09-30 23:53:55,391 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:55,392 INFO L375 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 1, 1, 1, 1, 1, 1] [2018-09-30 23:53:55,392 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:55,392 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:55,392 INFO L82 PathProgramCache]: Analyzing trace with hash 208575244, now seen corresponding path program 64 times [2018-09-30 23:53:55,392 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:55,392 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:55,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:55,393 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:55,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:55,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:57,225 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:57,225 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:57,226 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:53:57,234 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:53:57,282 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:53:57,282 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:57,286 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:57,339 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:57,359 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:57,360 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-30 23:53:57,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-30 23:53:57,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-30 23:53:57,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-30 23:53:57,361 INFO L87 Difference]: Start difference. First operand 263 states and 263 transitions. Second operand 67 states. [2018-09-30 23:53:57,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:57,553 INFO L93 Difference]: Finished difference Result 269 states and 269 transitions. [2018-09-30 23:53:57,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-30 23:53:57,553 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 262 [2018-09-30 23:53:57,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:57,555 INFO L225 Difference]: With dead ends: 269 [2018-09-30 23:53:57,555 INFO L226 Difference]: Without dead ends: 267 [2018-09-30 23:53:57,556 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-30 23:53:57,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2018-09-30 23:53:57,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 267. [2018-09-30 23:53:57,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2018-09-30 23:53:57,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 267 transitions. [2018-09-30 23:53:57,559 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 267 transitions. Word has length 262 [2018-09-30 23:53:57,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:57,559 INFO L480 AbstractCegarLoop]: Abstraction has 267 states and 267 transitions. [2018-09-30 23:53:57,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-30 23:53:57,559 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 267 transitions. [2018-09-30 23:53:57,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2018-09-30 23:53:57,561 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:57,561 INFO L375 BasicCegarLoop]: trace histogram [65, 65, 65, 65, 1, 1, 1, 1, 1, 1] [2018-09-30 23:53:57,561 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:57,561 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:57,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1868332362, now seen corresponding path program 65 times [2018-09-30 23:53:57,562 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:57,562 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:57,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:57,562 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:57,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:57,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:59,243 INFO L134 CoverageAnalysis]: Checked inductivity of 8385 backedges. 0 proven. 8385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:59,243 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:59,243 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 [2018-09-30 23:53:59,252 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:53:59,364 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-09-30 23:53:59,364 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:59,367 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:59,436 INFO L134 CoverageAnalysis]: Checked inductivity of 8385 backedges. 0 proven. 8385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:59,457 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:59,457 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-30 23:53:59,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-30 23:53:59,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-30 23:53:59,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 23:53:59,459 INFO L87 Difference]: Start difference. First operand 267 states and 267 transitions. Second operand 68 states. [2018-09-30 23:53:59,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:59,658 INFO L93 Difference]: Finished difference Result 273 states and 273 transitions. [2018-09-30 23:53:59,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-30 23:53:59,659 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 266 [2018-09-30 23:53:59,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:59,660 INFO L225 Difference]: With dead ends: 273 [2018-09-30 23:53:59,660 INFO L226 Difference]: Without dead ends: 271 [2018-09-30 23:53:59,661 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 23:53:59,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2018-09-30 23:53:59,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 271. [2018-09-30 23:53:59,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2018-09-30 23:53:59,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 271 transitions. [2018-09-30 23:53:59,665 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 271 transitions. Word has length 266 [2018-09-30 23:53:59,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:59,666 INFO L480 AbstractCegarLoop]: Abstraction has 271 states and 271 transitions. [2018-09-30 23:53:59,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-30 23:53:59,666 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 271 transitions. [2018-09-30 23:53:59,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2018-09-30 23:53:59,667 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:59,667 INFO L375 BasicCegarLoop]: trace histogram [66, 66, 66, 66, 1, 1, 1, 1, 1, 1] [2018-09-30 23:53:59,668 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:59,668 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:59,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1687648928, now seen corresponding path program 66 times [2018-09-30 23:53:59,668 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:59,668 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:59,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:59,669 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:59,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:59,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:01,448 INFO L134 CoverageAnalysis]: Checked inductivity of 8646 backedges. 0 proven. 8646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:01,448 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:54:01,448 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 [2018-09-30 23:54:01,455 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:54:01,551 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-09-30 23:54:01,551 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:54:01,554 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:54:01,605 INFO L134 CoverageAnalysis]: Checked inductivity of 8646 backedges. 0 proven. 8646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:01,625 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:54:01,626 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-09-30 23:54:01,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-30 23:54:01,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-30 23:54:01,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-30 23:54:01,627 INFO L87 Difference]: Start difference. First operand 271 states and 271 transitions. Second operand 69 states. [2018-09-30 23:54:01,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:54:01,795 INFO L93 Difference]: Finished difference Result 277 states and 277 transitions. [2018-09-30 23:54:01,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-30 23:54:01,795 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 270 [2018-09-30 23:54:01,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:54:01,797 INFO L225 Difference]: With dead ends: 277 [2018-09-30 23:54:01,797 INFO L226 Difference]: Without dead ends: 275 [2018-09-30 23:54:01,798 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-30 23:54:01,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2018-09-30 23:54:01,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2018-09-30 23:54:01,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2018-09-30 23:54:01,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 275 transitions. [2018-09-30 23:54:01,801 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 275 transitions. Word has length 270 [2018-09-30 23:54:01,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:54:01,801 INFO L480 AbstractCegarLoop]: Abstraction has 275 states and 275 transitions. [2018-09-30 23:54:01,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-30 23:54:01,802 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 275 transitions. [2018-09-30 23:54:01,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2018-09-30 23:54:01,803 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:54:01,803 INFO L375 BasicCegarLoop]: trace histogram [67, 67, 67, 67, 1, 1, 1, 1, 1, 1] [2018-09-30 23:54:01,803 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:54:01,803 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:54:01,804 INFO L82 PathProgramCache]: Analyzing trace with hash -516414710, now seen corresponding path program 67 times [2018-09-30 23:54:01,804 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:54:01,804 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:54:01,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:01,804 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:54:01,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:01,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:03,599 INFO L134 CoverageAnalysis]: Checked inductivity of 8911 backedges. 0 proven. 8911 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:03,599 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:54:03,599 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 [2018-09-30 23:54:03,607 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:54:03,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:03,663 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:54:03,722 INFO L134 CoverageAnalysis]: Checked inductivity of 8911 backedges. 0 proven. 8911 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:03,743 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:54:03,743 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-30 23:54:03,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-30 23:54:03,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-30 23:54:03,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 23:54:03,745 INFO L87 Difference]: Start difference. First operand 275 states and 275 transitions. Second operand 70 states. [2018-09-30 23:54:03,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:54:03,966 INFO L93 Difference]: Finished difference Result 281 states and 281 transitions. [2018-09-30 23:54:03,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-30 23:54:03,967 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 274 [2018-09-30 23:54:03,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:54:03,969 INFO L225 Difference]: With dead ends: 281 [2018-09-30 23:54:03,969 INFO L226 Difference]: Without dead ends: 279 [2018-09-30 23:54:03,970 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 23:54:03,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2018-09-30 23:54:03,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 279. [2018-09-30 23:54:03,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2018-09-30 23:54:03,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 279 transitions. [2018-09-30 23:54:03,973 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 279 transitions. Word has length 274 [2018-09-30 23:54:03,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:54:03,974 INFO L480 AbstractCegarLoop]: Abstraction has 279 states and 279 transitions. [2018-09-30 23:54:03,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-30 23:54:03,974 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 279 transitions. [2018-09-30 23:54:03,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2018-09-30 23:54:03,975 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:54:03,975 INFO L375 BasicCegarLoop]: trace histogram [68, 68, 68, 68, 1, 1, 1, 1, 1, 1] [2018-09-30 23:54:03,976 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:54:03,976 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:54:03,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1431100340, now seen corresponding path program 68 times [2018-09-30 23:54:03,976 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:54:03,976 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:54:03,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:03,977 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:54:03,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:03,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:06,210 INFO L134 CoverageAnalysis]: Checked inductivity of 9180 backedges. 0 proven. 9180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:06,211 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:54:06,211 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 [2018-09-30 23:54:06,219 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:54:06,273 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:54:06,274 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:54:06,277 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:54:06,337 INFO L134 CoverageAnalysis]: Checked inductivity of 9180 backedges. 0 proven. 9180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:06,357 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:54:06,357 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-30 23:54:06,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-30 23:54:06,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-30 23:54:06,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 23:54:06,359 INFO L87 Difference]: Start difference. First operand 279 states and 279 transitions. Second operand 71 states. [2018-09-30 23:54:06,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:54:06,571 INFO L93 Difference]: Finished difference Result 285 states and 285 transitions. [2018-09-30 23:54:06,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-30 23:54:06,571 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 278 [2018-09-30 23:54:06,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:54:06,573 INFO L225 Difference]: With dead ends: 285 [2018-09-30 23:54:06,573 INFO L226 Difference]: Without dead ends: 283 [2018-09-30 23:54:06,574 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 23:54:06,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2018-09-30 23:54:06,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 283. [2018-09-30 23:54:06,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2018-09-30 23:54:06,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 283 transitions. [2018-09-30 23:54:06,577 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 283 transitions. Word has length 278 [2018-09-30 23:54:06,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:54:06,577 INFO L480 AbstractCegarLoop]: Abstraction has 283 states and 283 transitions. [2018-09-30 23:54:06,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-30 23:54:06,577 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 283 transitions. [2018-09-30 23:54:06,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2018-09-30 23:54:06,578 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:54:06,578 INFO L375 BasicCegarLoop]: trace histogram [69, 69, 69, 69, 1, 1, 1, 1, 1, 1] [2018-09-30 23:54:06,579 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:54:06,579 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:54:06,579 INFO L82 PathProgramCache]: Analyzing trace with hash -912183458, now seen corresponding path program 69 times [2018-09-30 23:54:06,579 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:54:06,579 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:54:06,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:06,580 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:54:06,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:06,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:08,397 INFO L134 CoverageAnalysis]: Checked inductivity of 9453 backedges. 0 proven. 9453 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:08,398 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:54:08,398 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:54:08,405 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:54:08,503 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-09-30 23:54:08,503 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:54:08,507 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:54:08,589 INFO L134 CoverageAnalysis]: Checked inductivity of 9453 backedges. 0 proven. 9453 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:08,623 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:54:08,623 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-30 23:54:08,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-30 23:54:08,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-30 23:54:08,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 23:54:08,625 INFO L87 Difference]: Start difference. First operand 283 states and 283 transitions. Second operand 72 states. [2018-09-30 23:54:08,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:54:08,908 INFO L93 Difference]: Finished difference Result 289 states and 289 transitions. [2018-09-30 23:54:08,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-30 23:54:08,908 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 282 [2018-09-30 23:54:08,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:54:08,910 INFO L225 Difference]: With dead ends: 289 [2018-09-30 23:54:08,910 INFO L226 Difference]: Without dead ends: 287 [2018-09-30 23:54:08,911 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 23:54:08,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2018-09-30 23:54:08,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2018-09-30 23:54:08,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2018-09-30 23:54:08,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 287 transitions. [2018-09-30 23:54:08,913 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 287 transitions. Word has length 282 [2018-09-30 23:54:08,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:54:08,913 INFO L480 AbstractCegarLoop]: Abstraction has 287 states and 287 transitions. [2018-09-30 23:54:08,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-30 23:54:08,913 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 287 transitions. [2018-09-30 23:54:08,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2018-09-30 23:54:08,914 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:54:08,915 INFO L375 BasicCegarLoop]: trace histogram [70, 70, 70, 70, 1, 1, 1, 1, 1, 1] [2018-09-30 23:54:08,915 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:54:08,915 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:54:08,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1896899064, now seen corresponding path program 70 times [2018-09-30 23:54:08,915 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:54:08,915 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:54:08,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:08,916 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:54:08,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:08,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:11,000 INFO L134 CoverageAnalysis]: Checked inductivity of 9730 backedges. 0 proven. 9730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:11,001 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:54:11,001 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:54:11,008 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:54:11,065 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:54:11,066 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:54:11,070 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:54:11,132 INFO L134 CoverageAnalysis]: Checked inductivity of 9730 backedges. 0 proven. 9730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:11,152 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:54:11,152 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-09-30 23:54:11,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-30 23:54:11,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-30 23:54:11,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-30 23:54:11,153 INFO L87 Difference]: Start difference. First operand 287 states and 287 transitions. Second operand 73 states. [2018-09-30 23:54:11,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:54:11,360 INFO L93 Difference]: Finished difference Result 293 states and 293 transitions. [2018-09-30 23:54:11,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-30 23:54:11,360 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 286 [2018-09-30 23:54:11,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:54:11,362 INFO L225 Difference]: With dead ends: 293 [2018-09-30 23:54:11,362 INFO L226 Difference]: Without dead ends: 291 [2018-09-30 23:54:11,363 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-30 23:54:11,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2018-09-30 23:54:11,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 291. [2018-09-30 23:54:11,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2018-09-30 23:54:11,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 291 transitions. [2018-09-30 23:54:11,367 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 291 transitions. Word has length 286 [2018-09-30 23:54:11,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:54:11,367 INFO L480 AbstractCegarLoop]: Abstraction has 291 states and 291 transitions. [2018-09-30 23:54:11,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-30 23:54:11,367 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 291 transitions. [2018-09-30 23:54:11,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2018-09-30 23:54:11,369 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:54:11,369 INFO L375 BasicCegarLoop]: trace histogram [71, 71, 71, 71, 1, 1, 1, 1, 1, 1] [2018-09-30 23:54:11,369 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:54:11,369 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:54:11,369 INFO L82 PathProgramCache]: Analyzing trace with hash 347252658, now seen corresponding path program 71 times [2018-09-30 23:54:11,369 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:54:11,370 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:54:11,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:11,370 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:54:11,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:11,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:13,339 INFO L134 CoverageAnalysis]: Checked inductivity of 10011 backedges. 0 proven. 10011 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:13,340 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:54:13,340 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:54:13,346 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:54:13,459 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-09-30 23:54:13,459 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:54:13,463 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:54:13,533 INFO L134 CoverageAnalysis]: Checked inductivity of 10011 backedges. 0 proven. 10011 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:13,554 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:54:13,555 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-30 23:54:13,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-30 23:54:13,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-30 23:54:13,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 23:54:13,556 INFO L87 Difference]: Start difference. First operand 291 states and 291 transitions. Second operand 74 states. [2018-09-30 23:54:13,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:54:13,789 INFO L93 Difference]: Finished difference Result 297 states and 297 transitions. [2018-09-30 23:54:13,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-30 23:54:13,789 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 290 [2018-09-30 23:54:13,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:54:13,791 INFO L225 Difference]: With dead ends: 297 [2018-09-30 23:54:13,791 INFO L226 Difference]: Without dead ends: 295 [2018-09-30 23:54:13,792 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 23:54:13,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2018-09-30 23:54:13,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2018-09-30 23:54:13,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2018-09-30 23:54:13,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 295 transitions. [2018-09-30 23:54:13,795 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 295 transitions. Word has length 290 [2018-09-30 23:54:13,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:54:13,795 INFO L480 AbstractCegarLoop]: Abstraction has 295 states and 295 transitions. [2018-09-30 23:54:13,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-30 23:54:13,796 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 295 transitions. [2018-09-30 23:54:13,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2018-09-30 23:54:13,797 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:54:13,797 INFO L375 BasicCegarLoop]: trace histogram [72, 72, 72, 72, 1, 1, 1, 1, 1, 1] [2018-09-30 23:54:13,797 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:54:13,798 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:54:13,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1994077092, now seen corresponding path program 72 times [2018-09-30 23:54:13,798 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:54:13,798 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:54:13,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:13,799 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:54:13,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:13,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:16,111 INFO L134 CoverageAnalysis]: Checked inductivity of 10296 backedges. 0 proven. 10296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:16,111 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:54:16,111 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:54:16,119 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:54:16,219 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-09-30 23:54:16,219 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:54:16,223 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:54:16,289 INFO L134 CoverageAnalysis]: Checked inductivity of 10296 backedges. 0 proven. 10296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:16,309 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:54:16,309 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-09-30 23:54:16,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-30 23:54:16,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-30 23:54:16,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-30 23:54:16,311 INFO L87 Difference]: Start difference. First operand 295 states and 295 transitions. Second operand 75 states. [2018-09-30 23:54:16,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:54:16,556 INFO L93 Difference]: Finished difference Result 301 states and 301 transitions. [2018-09-30 23:54:16,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-30 23:54:16,556 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 294 [2018-09-30 23:54:16,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:54:16,558 INFO L225 Difference]: With dead ends: 301 [2018-09-30 23:54:16,558 INFO L226 Difference]: Without dead ends: 299 [2018-09-30 23:54:16,559 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-30 23:54:16,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2018-09-30 23:54:16,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299. [2018-09-30 23:54:16,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2018-09-30 23:54:16,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 299 transitions. [2018-09-30 23:54:16,562 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 299 transitions. Word has length 294 [2018-09-30 23:54:16,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:54:16,562 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 299 transitions. [2018-09-30 23:54:16,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-30 23:54:16,562 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 299 transitions. [2018-09-30 23:54:16,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2018-09-30 23:54:16,563 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:54:16,563 INFO L375 BasicCegarLoop]: trace histogram [73, 73, 73, 73, 1, 1, 1, 1, 1, 1] [2018-09-30 23:54:16,564 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:54:16,564 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:54:16,564 INFO L82 PathProgramCache]: Analyzing trace with hash 2034273286, now seen corresponding path program 73 times [2018-09-30 23:54:16,564 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:54:16,564 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:54:16,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:16,565 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:54:16,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:16,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:18,607 INFO L134 CoverageAnalysis]: Checked inductivity of 10585 backedges. 0 proven. 10585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:18,608 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:54:18,608 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:54:18,616 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:54:18,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:18,678 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:54:18,746 INFO L134 CoverageAnalysis]: Checked inductivity of 10585 backedges. 0 proven. 10585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:18,766 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:54:18,766 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-30 23:54:18,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-30 23:54:18,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-30 23:54:18,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-30 23:54:18,768 INFO L87 Difference]: Start difference. First operand 299 states and 299 transitions. Second operand 76 states. [2018-09-30 23:54:19,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:54:19,039 INFO L93 Difference]: Finished difference Result 305 states and 305 transitions. [2018-09-30 23:54:19,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-30 23:54:19,039 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 298 [2018-09-30 23:54:19,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:54:19,041 INFO L225 Difference]: With dead ends: 305 [2018-09-30 23:54:19,041 INFO L226 Difference]: Without dead ends: 303 [2018-09-30 23:54:19,042 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-30 23:54:19,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2018-09-30 23:54:19,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 303. [2018-09-30 23:54:19,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2018-09-30 23:54:19,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 303 transitions. [2018-09-30 23:54:19,045 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 303 transitions. Word has length 298 [2018-09-30 23:54:19,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:54:19,046 INFO L480 AbstractCegarLoop]: Abstraction has 303 states and 303 transitions. [2018-09-30 23:54:19,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-30 23:54:19,046 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 303 transitions. [2018-09-30 23:54:19,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2018-09-30 23:54:19,047 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:54:19,047 INFO L375 BasicCegarLoop]: trace histogram [74, 74, 74, 74, 1, 1, 1, 1, 1, 1] [2018-09-30 23:54:19,047 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:54:19,047 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:54:19,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1891657392, now seen corresponding path program 74 times [2018-09-30 23:54:19,048 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:54:19,048 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:54:19,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:19,048 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:54:19,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:19,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:21,404 INFO L134 CoverageAnalysis]: Checked inductivity of 10878 backedges. 0 proven. 10878 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:21,404 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:54:21,404 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:54:21,413 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:54:21,471 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:54:21,471 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:54:21,474 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:54:21,557 INFO L134 CoverageAnalysis]: Checked inductivity of 10878 backedges. 0 proven. 10878 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:21,577 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:54:21,577 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-09-30 23:54:21,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-30 23:54:21,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-30 23:54:21,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-30 23:54:21,578 INFO L87 Difference]: Start difference. First operand 303 states and 303 transitions. Second operand 77 states. [2018-09-30 23:54:21,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:54:21,750 INFO L93 Difference]: Finished difference Result 309 states and 309 transitions. [2018-09-30 23:54:21,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-30 23:54:21,750 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 302 [2018-09-30 23:54:21,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:54:21,752 INFO L225 Difference]: With dead ends: 309 [2018-09-30 23:54:21,752 INFO L226 Difference]: Without dead ends: 307 [2018-09-30 23:54:21,753 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-30 23:54:21,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2018-09-30 23:54:21,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 307. [2018-09-30 23:54:21,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2018-09-30 23:54:21,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 307 transitions. [2018-09-30 23:54:21,756 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 307 transitions. Word has length 302 [2018-09-30 23:54:21,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:54:21,757 INFO L480 AbstractCegarLoop]: Abstraction has 307 states and 307 transitions. [2018-09-30 23:54:21,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-30 23:54:21,757 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 307 transitions. [2018-09-30 23:54:21,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2018-09-30 23:54:21,758 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:54:21,758 INFO L375 BasicCegarLoop]: trace histogram [75, 75, 75, 75, 1, 1, 1, 1, 1, 1] [2018-09-30 23:54:21,758 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:54:21,759 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:54:21,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1709253542, now seen corresponding path program 75 times [2018-09-30 23:54:21,759 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:54:21,759 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:54:21,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:21,760 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:54:21,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:21,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:23,963 INFO L134 CoverageAnalysis]: Checked inductivity of 11175 backedges. 0 proven. 11175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:23,963 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:54:23,963 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:54:23,971 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:54:24,084 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-09-30 23:54:24,084 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:54:24,088 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:54:24,173 INFO L134 CoverageAnalysis]: Checked inductivity of 11175 backedges. 0 proven. 11175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:24,193 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:54:24,193 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-30 23:54:24,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-30 23:54:24,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-30 23:54:24,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 23:54:24,194 INFO L87 Difference]: Start difference. First operand 307 states and 307 transitions. Second operand 78 states. [2018-09-30 23:54:24,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:54:24,616 INFO L93 Difference]: Finished difference Result 313 states and 313 transitions. [2018-09-30 23:54:24,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-30 23:54:24,616 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 306 [2018-09-30 23:54:24,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:54:24,618 INFO L225 Difference]: With dead ends: 313 [2018-09-30 23:54:24,618 INFO L226 Difference]: Without dead ends: 311 [2018-09-30 23:54:24,618 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 23:54:24,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2018-09-30 23:54:24,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 311. [2018-09-30 23:54:24,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2018-09-30 23:54:24,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 311 transitions. [2018-09-30 23:54:24,622 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 311 transitions. Word has length 306 [2018-09-30 23:54:24,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:54:24,622 INFO L480 AbstractCegarLoop]: Abstraction has 311 states and 311 transitions. [2018-09-30 23:54:24,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-30 23:54:24,623 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 311 transitions. [2018-09-30 23:54:24,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2018-09-30 23:54:24,624 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:54:24,624 INFO L375 BasicCegarLoop]: trace histogram [76, 76, 76, 76, 1, 1, 1, 1, 1, 1] [2018-09-30 23:54:24,625 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:54:24,625 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:54:24,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1586916612, now seen corresponding path program 76 times [2018-09-30 23:54:24,625 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:54:24,625 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:54:24,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:24,626 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:54:24,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:24,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:28,097 INFO L134 CoverageAnalysis]: Checked inductivity of 11476 backedges. 0 proven. 11476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:28,097 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:54:28,097 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:54:28,105 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:54:28,175 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:54:28,175 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:54:28,178 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:54:28,251 INFO L134 CoverageAnalysis]: Checked inductivity of 11476 backedges. 0 proven. 11476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:28,271 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:54:28,271 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-09-30 23:54:28,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-30 23:54:28,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-30 23:54:28,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-30 23:54:28,273 INFO L87 Difference]: Start difference. First operand 311 states and 311 transitions. Second operand 79 states. [2018-09-30 23:54:28,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:54:28,492 INFO L93 Difference]: Finished difference Result 317 states and 317 transitions. [2018-09-30 23:54:28,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-30 23:54:28,493 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 310 [2018-09-30 23:54:28,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:54:28,495 INFO L225 Difference]: With dead ends: 317 [2018-09-30 23:54:28,495 INFO L226 Difference]: Without dead ends: 315 [2018-09-30 23:54:28,496 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-30 23:54:28,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2018-09-30 23:54:28,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 315. [2018-09-30 23:54:28,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2018-09-30 23:54:28,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 315 transitions. [2018-09-30 23:54:28,499 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 315 transitions. Word has length 310 [2018-09-30 23:54:28,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:54:28,499 INFO L480 AbstractCegarLoop]: Abstraction has 315 states and 315 transitions. [2018-09-30 23:54:28,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-30 23:54:28,499 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 315 transitions. [2018-09-30 23:54:28,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2018-09-30 23:54:28,500 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:54:28,500 INFO L375 BasicCegarLoop]: trace histogram [77, 77, 77, 77, 1, 1, 1, 1, 1, 1] [2018-09-30 23:54:28,501 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:54:28,501 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:54:28,501 INFO L82 PathProgramCache]: Analyzing trace with hash 102865070, now seen corresponding path program 77 times [2018-09-30 23:54:28,501 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:54:28,501 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:54:28,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:28,502 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:54:28,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:28,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:30,995 INFO L134 CoverageAnalysis]: Checked inductivity of 11781 backedges. 0 proven. 11781 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:30,995 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:54:30,996 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:54:31,003 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:54:31,127 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-09-30 23:54:31,127 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:54:31,132 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:54:31,206 INFO L134 CoverageAnalysis]: Checked inductivity of 11781 backedges. 0 proven. 11781 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:31,227 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:54:31,227 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-09-30 23:54:31,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-30 23:54:31,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-30 23:54:31,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-30 23:54:31,229 INFO L87 Difference]: Start difference. First operand 315 states and 315 transitions. Second operand 80 states. [2018-09-30 23:54:31,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:54:31,407 INFO L93 Difference]: Finished difference Result 321 states and 321 transitions. [2018-09-30 23:54:31,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-30 23:54:31,408 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 314 [2018-09-30 23:54:31,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:54:31,410 INFO L225 Difference]: With dead ends: 321 [2018-09-30 23:54:31,410 INFO L226 Difference]: Without dead ends: 319 [2018-09-30 23:54:31,411 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-30 23:54:31,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2018-09-30 23:54:31,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2018-09-30 23:54:31,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2018-09-30 23:54:31,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 319 transitions. [2018-09-30 23:54:31,414 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 319 transitions. Word has length 314 [2018-09-30 23:54:31,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:54:31,414 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 319 transitions. [2018-09-30 23:54:31,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-30 23:54:31,414 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 319 transitions. [2018-09-30 23:54:31,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2018-09-30 23:54:31,415 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:54:31,416 INFO L375 BasicCegarLoop]: trace histogram [78, 78, 78, 78, 1, 1, 1, 1, 1, 1] [2018-09-30 23:54:31,416 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:54:31,416 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:54:31,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1467670360, now seen corresponding path program 78 times [2018-09-30 23:54:31,416 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:54:31,416 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:54:31,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:31,417 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:54:31,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:31,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:33,755 INFO L134 CoverageAnalysis]: Checked inductivity of 12090 backedges. 0 proven. 12090 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:33,755 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:54:33,756 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:54:33,762 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:54:33,889 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-09-30 23:54:33,889 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:54:33,894 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:54:34,005 INFO L134 CoverageAnalysis]: Checked inductivity of 12090 backedges. 0 proven. 12090 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:34,025 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:54:34,025 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-09-30 23:54:34,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-30 23:54:34,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-30 23:54:34,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-30 23:54:34,027 INFO L87 Difference]: Start difference. First operand 319 states and 319 transitions. Second operand 81 states. [2018-09-30 23:54:34,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:54:34,214 INFO L93 Difference]: Finished difference Result 325 states and 325 transitions. [2018-09-30 23:54:34,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-30 23:54:34,214 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 318 [2018-09-30 23:54:34,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:54:34,216 INFO L225 Difference]: With dead ends: 325 [2018-09-30 23:54:34,216 INFO L226 Difference]: Without dead ends: 323 [2018-09-30 23:54:34,217 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-30 23:54:34,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2018-09-30 23:54:34,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 323. [2018-09-30 23:54:34,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2018-09-30 23:54:34,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 323 transitions. [2018-09-30 23:54:34,220 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 323 transitions. Word has length 318 [2018-09-30 23:54:34,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:54:34,221 INFO L480 AbstractCegarLoop]: Abstraction has 323 states and 323 transitions. [2018-09-30 23:54:34,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-30 23:54:34,221 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 323 transitions. [2018-09-30 23:54:34,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2018-09-30 23:54:34,222 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:54:34,222 INFO L375 BasicCegarLoop]: trace histogram [79, 79, 79, 79, 1, 1, 1, 1, 1, 1] [2018-09-30 23:54:34,222 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:54:34,222 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:54:34,222 INFO L82 PathProgramCache]: Analyzing trace with hash 941408514, now seen corresponding path program 79 times [2018-09-30 23:54:34,222 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:54:34,223 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:54:34,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:34,223 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:54:34,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:34,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:37,224 INFO L134 CoverageAnalysis]: Checked inductivity of 12403 backedges. 0 proven. 12403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:37,225 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:54:37,225 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:54:37,233 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:54:37,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:37,308 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:54:37,400 INFO L134 CoverageAnalysis]: Checked inductivity of 12403 backedges. 0 proven. 12403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:37,420 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:54:37,420 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-09-30 23:54:37,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-30 23:54:37,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-30 23:54:37,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-30 23:54:37,422 INFO L87 Difference]: Start difference. First operand 323 states and 323 transitions. Second operand 82 states. [2018-09-30 23:54:37,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:54:37,605 INFO L93 Difference]: Finished difference Result 329 states and 329 transitions. [2018-09-30 23:54:37,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-30 23:54:37,606 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 322 [2018-09-30 23:54:37,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:54:37,608 INFO L225 Difference]: With dead ends: 329 [2018-09-30 23:54:37,608 INFO L226 Difference]: Without dead ends: 327 [2018-09-30 23:54:37,609 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-30 23:54:37,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2018-09-30 23:54:37,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 327. [2018-09-30 23:54:37,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2018-09-30 23:54:37,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 327 transitions. [2018-09-30 23:54:37,612 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 327 transitions. Word has length 322 [2018-09-30 23:54:37,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:54:37,612 INFO L480 AbstractCegarLoop]: Abstraction has 327 states and 327 transitions. [2018-09-30 23:54:37,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-30 23:54:37,612 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 327 transitions. [2018-09-30 23:54:37,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2018-09-30 23:54:37,613 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:54:37,614 INFO L375 BasicCegarLoop]: trace histogram [80, 80, 80, 80, 1, 1, 1, 1, 1, 1] [2018-09-30 23:54:37,614 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:54:37,614 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:54:37,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1279376812, now seen corresponding path program 80 times [2018-09-30 23:54:37,614 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:54:37,614 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:54:37,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:37,615 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:54:37,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:37,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:40,038 INFO L134 CoverageAnalysis]: Checked inductivity of 12720 backedges. 0 proven. 12720 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:40,039 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:54:40,039 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:54:40,046 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:54:40,110 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:54:40,110 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:54:40,114 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:54:40,193 INFO L134 CoverageAnalysis]: Checked inductivity of 12720 backedges. 0 proven. 12720 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:40,213 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:54:40,213 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-09-30 23:54:40,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-30 23:54:40,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-30 23:54:40,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-30 23:54:40,214 INFO L87 Difference]: Start difference. First operand 327 states and 327 transitions. Second operand 83 states. [2018-09-30 23:54:40,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:54:40,551 INFO L93 Difference]: Finished difference Result 333 states and 333 transitions. [2018-09-30 23:54:40,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-30 23:54:40,551 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 326 [2018-09-30 23:54:40,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:54:40,553 INFO L225 Difference]: With dead ends: 333 [2018-09-30 23:54:40,553 INFO L226 Difference]: Without dead ends: 331 [2018-09-30 23:54:40,553 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-30 23:54:40,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2018-09-30 23:54:40,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 331. [2018-09-30 23:54:40,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2018-09-30 23:54:40,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 331 transitions. [2018-09-30 23:54:40,556 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 331 transitions. Word has length 326 [2018-09-30 23:54:40,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:54:40,556 INFO L480 AbstractCegarLoop]: Abstraction has 331 states and 331 transitions. [2018-09-30 23:54:40,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-30 23:54:40,556 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 331 transitions. [2018-09-30 23:54:40,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2018-09-30 23:54:40,557 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:54:40,557 INFO L375 BasicCegarLoop]: trace histogram [81, 81, 81, 81, 1, 1, 1, 1, 1, 1] [2018-09-30 23:54:40,557 INFO L423 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:54:40,558 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:54:40,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1763420842, now seen corresponding path program 81 times [2018-09-30 23:54:40,558 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:54:40,558 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:54:40,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:40,558 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:54:40,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:40,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:43,044 INFO L134 CoverageAnalysis]: Checked inductivity of 13041 backedges. 0 proven. 13041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:43,044 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:54:43,044 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:54:43,052 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:54:43,193 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2018-09-30 23:54:43,194 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:54:43,198 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:54:43,278 INFO L134 CoverageAnalysis]: Checked inductivity of 13041 backedges. 0 proven. 13041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:43,299 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:54:43,299 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-09-30 23:54:43,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-30 23:54:43,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-30 23:54:43,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-30 23:54:43,300 INFO L87 Difference]: Start difference. First operand 331 states and 331 transitions. Second operand 84 states. [2018-09-30 23:54:43,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:54:43,560 INFO L93 Difference]: Finished difference Result 337 states and 337 transitions. [2018-09-30 23:54:43,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-30 23:54:43,561 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 330 [2018-09-30 23:54:43,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:54:43,563 INFO L225 Difference]: With dead ends: 337 [2018-09-30 23:54:43,563 INFO L226 Difference]: Without dead ends: 335 [2018-09-30 23:54:43,564 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-30 23:54:43,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2018-09-30 23:54:43,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 335. [2018-09-30 23:54:43,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2018-09-30 23:54:43,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 335 transitions. [2018-09-30 23:54:43,566 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 335 transitions. Word has length 330 [2018-09-30 23:54:43,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:54:43,567 INFO L480 AbstractCegarLoop]: Abstraction has 335 states and 335 transitions. [2018-09-30 23:54:43,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-30 23:54:43,567 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 335 transitions. [2018-09-30 23:54:43,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2018-09-30 23:54:43,568 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:54:43,568 INFO L375 BasicCegarLoop]: trace histogram [82, 82, 82, 82, 1, 1, 1, 1, 1, 1] [2018-09-30 23:54:43,568 INFO L423 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:54:43,568 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:54:43,568 INFO L82 PathProgramCache]: Analyzing trace with hash 431949824, now seen corresponding path program 82 times [2018-09-30 23:54:43,569 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:54:43,569 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:54:43,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:43,569 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:54:43,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:43,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:46,411 INFO L134 CoverageAnalysis]: Checked inductivity of 13366 backedges. 0 proven. 13366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:46,411 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:54:46,411 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:54:46,419 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:54:46,485 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:54:46,485 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:54:46,489 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:54:46,599 INFO L134 CoverageAnalysis]: Checked inductivity of 13366 backedges. 0 proven. 13366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:46,625 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:54:46,625 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-09-30 23:54:46,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-09-30 23:54:46,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-09-30 23:54:46,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-30 23:54:46,627 INFO L87 Difference]: Start difference. First operand 335 states and 335 transitions. Second operand 85 states. [2018-09-30 23:54:46,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:54:46,952 INFO L93 Difference]: Finished difference Result 341 states and 341 transitions. [2018-09-30 23:54:46,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-30 23:54:46,952 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 334 [2018-09-30 23:54:46,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:54:46,955 INFO L225 Difference]: With dead ends: 341 [2018-09-30 23:54:46,955 INFO L226 Difference]: Without dead ends: 339 [2018-09-30 23:54:46,955 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-30 23:54:46,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2018-09-30 23:54:46,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 339. [2018-09-30 23:54:46,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2018-09-30 23:54:46,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 339 transitions. [2018-09-30 23:54:46,959 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 339 transitions. Word has length 334 [2018-09-30 23:54:46,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:54:46,959 INFO L480 AbstractCegarLoop]: Abstraction has 339 states and 339 transitions. [2018-09-30 23:54:46,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-09-30 23:54:46,959 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 339 transitions. [2018-09-30 23:54:46,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2018-09-30 23:54:46,960 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:54:46,960 INFO L375 BasicCegarLoop]: trace histogram [83, 83, 83, 83, 1, 1, 1, 1, 1, 1] [2018-09-30 23:54:46,960 INFO L423 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:54:46,961 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:54:46,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1967936938, now seen corresponding path program 83 times [2018-09-30 23:54:46,961 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:54:46,961 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:54:46,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:46,962 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:54:46,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:46,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:49,530 INFO L134 CoverageAnalysis]: Checked inductivity of 13695 backedges. 0 proven. 13695 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:49,530 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:54:49,530 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:54:49,540 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:54:49,675 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s) [2018-09-30 23:54:49,675 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:54:49,679 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:54:49,764 INFO L134 CoverageAnalysis]: Checked inductivity of 13695 backedges. 0 proven. 13695 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:49,785 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:54:49,785 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-09-30 23:54:49,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-30 23:54:49,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-30 23:54:49,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-30 23:54:49,787 INFO L87 Difference]: Start difference. First operand 339 states and 339 transitions. Second operand 86 states. [2018-09-30 23:54:50,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:54:50,066 INFO L93 Difference]: Finished difference Result 345 states and 345 transitions. [2018-09-30 23:54:50,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-30 23:54:50,067 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 338 [2018-09-30 23:54:50,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:54:50,069 INFO L225 Difference]: With dead ends: 345 [2018-09-30 23:54:50,069 INFO L226 Difference]: Without dead ends: 343 [2018-09-30 23:54:50,070 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-30 23:54:50,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2018-09-30 23:54:50,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 343. [2018-09-30 23:54:50,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2018-09-30 23:54:50,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 343 transitions. [2018-09-30 23:54:50,074 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 343 transitions. Word has length 338 [2018-09-30 23:54:50,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:54:50,074 INFO L480 AbstractCegarLoop]: Abstraction has 343 states and 343 transitions. [2018-09-30 23:54:50,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-30 23:54:50,074 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 343 transitions. [2018-09-30 23:54:50,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2018-09-30 23:54:50,075 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:54:50,076 INFO L375 BasicCegarLoop]: trace histogram [84, 84, 84, 84, 1, 1, 1, 1, 1, 1] [2018-09-30 23:54:50,076 INFO L423 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:54:50,076 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:54:50,076 INFO L82 PathProgramCache]: Analyzing trace with hash -2000241068, now seen corresponding path program 84 times [2018-09-30 23:54:50,076 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:54:50,076 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:54:50,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:50,077 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:54:50,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:50,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:52,990 INFO L134 CoverageAnalysis]: Checked inductivity of 14028 backedges. 0 proven. 14028 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:52,990 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:54:52,990 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:54:52,998 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:54:53,127 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2018-09-30 23:54:53,127 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:54:53,131 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:54:53,218 INFO L134 CoverageAnalysis]: Checked inductivity of 14028 backedges. 0 proven. 14028 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:53,240 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:54:53,240 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-09-30 23:54:53,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-09-30 23:54:53,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-09-30 23:54:53,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-30 23:54:53,242 INFO L87 Difference]: Start difference. First operand 343 states and 343 transitions. Second operand 87 states. [2018-09-30 23:54:53,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:54:53,585 INFO L93 Difference]: Finished difference Result 349 states and 349 transitions. [2018-09-30 23:54:53,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-30 23:54:53,586 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 342 [2018-09-30 23:54:53,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:54:53,587 INFO L225 Difference]: With dead ends: 349 [2018-09-30 23:54:53,588 INFO L226 Difference]: Without dead ends: 347 [2018-09-30 23:54:53,588 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-30 23:54:53,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2018-09-30 23:54:53,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 347. [2018-09-30 23:54:53,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 347 states. [2018-09-30 23:54:53,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 347 transitions. [2018-09-30 23:54:53,592 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 347 transitions. Word has length 342 [2018-09-30 23:54:53,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:54:53,592 INFO L480 AbstractCegarLoop]: Abstraction has 347 states and 347 transitions. [2018-09-30 23:54:53,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-09-30 23:54:53,593 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 347 transitions. [2018-09-30 23:54:53,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2018-09-30 23:54:53,594 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:54:53,594 INFO L375 BasicCegarLoop]: trace histogram [85, 85, 85, 85, 1, 1, 1, 1, 1, 1] [2018-09-30 23:54:53,595 INFO L423 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:54:53,595 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:54:53,595 INFO L82 PathProgramCache]: Analyzing trace with hash 304660990, now seen corresponding path program 85 times [2018-09-30 23:54:53,595 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:54:53,595 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:54:53,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:53,596 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:54:53,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:53,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:56,708 INFO L134 CoverageAnalysis]: Checked inductivity of 14365 backedges. 0 proven. 14365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:56,708 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:54:56,708 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:54:56,716 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:54:56,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:56,786 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:54:56,874 INFO L134 CoverageAnalysis]: Checked inductivity of 14365 backedges. 0 proven. 14365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:56,895 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:54:56,895 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-09-30 23:54:56,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-30 23:54:56,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-30 23:54:56,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-30 23:54:56,897 INFO L87 Difference]: Start difference. First operand 347 states and 347 transitions. Second operand 88 states. [2018-09-30 23:54:57,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:54:57,232 INFO L93 Difference]: Finished difference Result 353 states and 353 transitions. [2018-09-30 23:54:57,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-30 23:54:57,232 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 346 [2018-09-30 23:54:57,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:54:57,234 INFO L225 Difference]: With dead ends: 353 [2018-09-30 23:54:57,235 INFO L226 Difference]: Without dead ends: 351 [2018-09-30 23:54:57,235 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-30 23:54:57,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2018-09-30 23:54:57,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 351. [2018-09-30 23:54:57,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2018-09-30 23:54:57,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 351 transitions. [2018-09-30 23:54:57,238 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 351 transitions. Word has length 346 [2018-09-30 23:54:57,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:54:57,239 INFO L480 AbstractCegarLoop]: Abstraction has 351 states and 351 transitions. [2018-09-30 23:54:57,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-30 23:54:57,239 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 351 transitions. [2018-09-30 23:54:57,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2018-09-30 23:54:57,240 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:54:57,240 INFO L375 BasicCegarLoop]: trace histogram [86, 86, 86, 86, 1, 1, 1, 1, 1, 1] [2018-09-30 23:54:57,240 INFO L423 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:54:57,240 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:54:57,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1311563944, now seen corresponding path program 86 times [2018-09-30 23:54:57,241 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:54:57,241 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:54:57,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:57,241 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:54:57,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:57,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:55:00,030 INFO L134 CoverageAnalysis]: Checked inductivity of 14706 backedges. 0 proven. 14706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:00,030 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:55:00,030 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:55:00,037 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:55:00,106 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:55:00,106 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:55:00,110 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:55:00,201 INFO L134 CoverageAnalysis]: Checked inductivity of 14706 backedges. 0 proven. 14706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:00,221 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:55:00,221 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-09-30 23:55:00,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-30 23:55:00,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-30 23:55:00,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-30 23:55:00,223 INFO L87 Difference]: Start difference. First operand 351 states and 351 transitions. Second operand 89 states. [2018-09-30 23:55:00,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:55:00,581 INFO L93 Difference]: Finished difference Result 357 states and 357 transitions. [2018-09-30 23:55:00,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-30 23:55:00,581 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 350 [2018-09-30 23:55:00,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:55:00,583 INFO L225 Difference]: With dead ends: 357 [2018-09-30 23:55:00,583 INFO L226 Difference]: Without dead ends: 355 [2018-09-30 23:55:00,584 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 350 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-30 23:55:00,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2018-09-30 23:55:00,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 355. [2018-09-30 23:55:00,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2018-09-30 23:55:00,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 355 transitions. [2018-09-30 23:55:00,587 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 355 transitions. Word has length 350 [2018-09-30 23:55:00,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:55:00,587 INFO L480 AbstractCegarLoop]: Abstraction has 355 states and 355 transitions. [2018-09-30 23:55:00,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-30 23:55:00,587 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 355 transitions. [2018-09-30 23:55:00,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2018-09-30 23:55:00,589 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:55:00,589 INFO L375 BasicCegarLoop]: trace histogram [87, 87, 87, 87, 1, 1, 1, 1, 1, 1] [2018-09-30 23:55:00,589 INFO L423 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:55:00,589 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:55:00,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1739744686, now seen corresponding path program 87 times [2018-09-30 23:55:00,589 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:55:00,589 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:55:00,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:00,590 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:55:00,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:00,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:55:03,737 INFO L134 CoverageAnalysis]: Checked inductivity of 15051 backedges. 0 proven. 15051 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:03,737 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:55:03,737 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:55:03,745 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:55:03,889 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 88 check-sat command(s) [2018-09-30 23:55:03,889 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:55:03,894 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:55:03,989 INFO L134 CoverageAnalysis]: Checked inductivity of 15051 backedges. 0 proven. 15051 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:04,010 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:55:04,010 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-09-30 23:55:04,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-30 23:55:04,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-30 23:55:04,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-30 23:55:04,011 INFO L87 Difference]: Start difference. First operand 355 states and 355 transitions. Second operand 90 states. [2018-09-30 23:55:04,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:55:04,206 INFO L93 Difference]: Finished difference Result 361 states and 361 transitions. [2018-09-30 23:55:04,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-30 23:55:04,207 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 354 [2018-09-30 23:55:04,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:55:04,209 INFO L225 Difference]: With dead ends: 361 [2018-09-30 23:55:04,209 INFO L226 Difference]: Without dead ends: 359 [2018-09-30 23:55:04,210 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 354 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-30 23:55:04,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2018-09-30 23:55:04,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 359. [2018-09-30 23:55:04,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 359 states. [2018-09-30 23:55:04,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 359 transitions. [2018-09-30 23:55:04,213 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 359 transitions. Word has length 354 [2018-09-30 23:55:04,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:55:04,213 INFO L480 AbstractCegarLoop]: Abstraction has 359 states and 359 transitions. [2018-09-30 23:55:04,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-30 23:55:04,213 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 359 transitions. [2018-09-30 23:55:04,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2018-09-30 23:55:04,214 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:55:04,214 INFO L375 BasicCegarLoop]: trace histogram [88, 88, 88, 88, 1, 1, 1, 1, 1, 1] [2018-09-30 23:55:04,215 INFO L423 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:55:04,215 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:55:04,215 INFO L82 PathProgramCache]: Analyzing trace with hash 180711164, now seen corresponding path program 88 times [2018-09-30 23:55:04,215 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:55:04,215 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:55:04,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:04,216 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:55:04,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:04,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:55:07,390 INFO L134 CoverageAnalysis]: Checked inductivity of 15400 backedges. 0 proven. 15400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:07,391 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:55:07,391 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:55:07,397 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:55:07,482 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:55:07,483 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:55:07,488 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:55:07,608 INFO L134 CoverageAnalysis]: Checked inductivity of 15400 backedges. 0 proven. 15400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:07,628 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:55:07,628 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-09-30 23:55:07,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-09-30 23:55:07,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-09-30 23:55:07,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-30 23:55:07,630 INFO L87 Difference]: Start difference. First operand 359 states and 359 transitions. Second operand 91 states. [2018-09-30 23:55:08,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:55:08,004 INFO L93 Difference]: Finished difference Result 365 states and 365 transitions. [2018-09-30 23:55:08,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-30 23:55:08,005 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 358 [2018-09-30 23:55:08,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:55:08,007 INFO L225 Difference]: With dead ends: 365 [2018-09-30 23:55:08,007 INFO L226 Difference]: Without dead ends: 363 [2018-09-30 23:55:08,008 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-30 23:55:08,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2018-09-30 23:55:08,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 363. [2018-09-30 23:55:08,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 363 states. [2018-09-30 23:55:08,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 363 transitions. [2018-09-30 23:55:08,011 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 363 transitions. Word has length 358 [2018-09-30 23:55:08,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:55:08,011 INFO L480 AbstractCegarLoop]: Abstraction has 363 states and 363 transitions. [2018-09-30 23:55:08,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-09-30 23:55:08,011 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 363 transitions. [2018-09-30 23:55:08,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2018-09-30 23:55:08,013 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:55:08,013 INFO L375 BasicCegarLoop]: trace histogram [89, 89, 89, 89, 1, 1, 1, 1, 1, 1] [2018-09-30 23:55:08,013 INFO L423 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:55:08,013 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:55:08,013 INFO L82 PathProgramCache]: Analyzing trace with hash 512679590, now seen corresponding path program 89 times [2018-09-30 23:55:08,013 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:55:08,014 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:55:08,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:08,014 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:55:08,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:08,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:55:10,918 INFO L134 CoverageAnalysis]: Checked inductivity of 15753 backedges. 0 proven. 15753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:10,918 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:55:10,918 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:55:10,926 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:55:11,089 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 90 check-sat command(s) [2018-09-30 23:55:11,090 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:55:11,094 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:55:11,198 INFO L134 CoverageAnalysis]: Checked inductivity of 15753 backedges. 0 proven. 15753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:11,218 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:55:11,219 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-09-30 23:55:11,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-30 23:55:11,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-30 23:55:11,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-30 23:55:11,220 INFO L87 Difference]: Start difference. First operand 363 states and 363 transitions. Second operand 92 states. [2018-09-30 23:55:11,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:55:11,642 INFO L93 Difference]: Finished difference Result 369 states and 369 transitions. [2018-09-30 23:55:11,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-30 23:55:11,642 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 362 [2018-09-30 23:55:11,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:55:11,644 INFO L225 Difference]: With dead ends: 369 [2018-09-30 23:55:11,644 INFO L226 Difference]: Without dead ends: 367 [2018-09-30 23:55:11,645 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-30 23:55:11,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2018-09-30 23:55:11,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 367. [2018-09-30 23:55:11,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 367 states. [2018-09-30 23:55:11,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 367 transitions. [2018-09-30 23:55:11,648 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 367 transitions. Word has length 362 [2018-09-30 23:55:11,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:55:11,648 INFO L480 AbstractCegarLoop]: Abstraction has 367 states and 367 transitions. [2018-09-30 23:55:11,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-30 23:55:11,648 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 367 transitions. [2018-09-30 23:55:11,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2018-09-30 23:55:11,649 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:55:11,650 INFO L375 BasicCegarLoop]: trace histogram [90, 90, 90, 90, 1, 1, 1, 1, 1, 1] [2018-09-30 23:55:11,650 INFO L423 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:55:11,650 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:55:11,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1264871760, now seen corresponding path program 90 times [2018-09-30 23:55:11,650 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:55:11,650 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:55:11,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:11,651 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:55:11,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:11,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:55:14,655 INFO L134 CoverageAnalysis]: Checked inductivity of 16110 backedges. 0 proven. 16110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:14,655 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:55:14,655 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:55:14,664 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:55:14,841 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2018-09-30 23:55:14,841 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:55:14,845 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:55:14,942 INFO L134 CoverageAnalysis]: Checked inductivity of 16110 backedges. 0 proven. 16110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:14,963 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:55:14,963 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-09-30 23:55:14,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-09-30 23:55:14,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-09-30 23:55:14,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-30 23:55:14,964 INFO L87 Difference]: Start difference. First operand 367 states and 367 transitions. Second operand 93 states. [2018-09-30 23:55:15,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:55:15,348 INFO L93 Difference]: Finished difference Result 373 states and 373 transitions. [2018-09-30 23:55:15,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-30 23:55:15,348 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 366 [2018-09-30 23:55:15,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:55:15,350 INFO L225 Difference]: With dead ends: 373 [2018-09-30 23:55:15,350 INFO L226 Difference]: Without dead ends: 371 [2018-09-30 23:55:15,350 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-30 23:55:15,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2018-09-30 23:55:15,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 371. [2018-09-30 23:55:15,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 371 states. [2018-09-30 23:55:15,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 371 transitions. [2018-09-30 23:55:15,353 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 371 transitions. Word has length 366 [2018-09-30 23:55:15,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:55:15,353 INFO L480 AbstractCegarLoop]: Abstraction has 371 states and 371 transitions. [2018-09-30 23:55:15,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-09-30 23:55:15,353 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 371 transitions. [2018-09-30 23:55:15,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2018-09-30 23:55:15,355 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:55:15,355 INFO L375 BasicCegarLoop]: trace histogram [91, 91, 91, 91, 1, 1, 1, 1, 1, 1] [2018-09-30 23:55:15,355 INFO L423 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:55:15,355 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:55:15,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1480552710, now seen corresponding path program 91 times [2018-09-30 23:55:15,356 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:55:15,356 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:55:15,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:15,357 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:55:15,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:15,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:55:18,779 INFO L134 CoverageAnalysis]: Checked inductivity of 16471 backedges. 0 proven. 16471 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:18,779 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:55:18,780 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:55:18,786 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:55:18,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:55:18,861 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:55:18,962 INFO L134 CoverageAnalysis]: Checked inductivity of 16471 backedges. 0 proven. 16471 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:18,982 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:55:18,982 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-09-30 23:55:18,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-30 23:55:18,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-30 23:55:18,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-30 23:55:18,983 INFO L87 Difference]: Start difference. First operand 371 states and 371 transitions. Second operand 94 states. [2018-09-30 23:55:19,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:55:19,423 INFO L93 Difference]: Finished difference Result 377 states and 377 transitions. [2018-09-30 23:55:19,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-30 23:55:19,424 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 370 [2018-09-30 23:55:19,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:55:19,425 INFO L225 Difference]: With dead ends: 377 [2018-09-30 23:55:19,425 INFO L226 Difference]: Without dead ends: 375 [2018-09-30 23:55:19,426 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-30 23:55:19,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2018-09-30 23:55:19,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 375. [2018-09-30 23:55:19,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 375 states. [2018-09-30 23:55:19,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 375 transitions. [2018-09-30 23:55:19,430 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 375 transitions. Word has length 370 [2018-09-30 23:55:19,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:55:19,430 INFO L480 AbstractCegarLoop]: Abstraction has 375 states and 375 transitions. [2018-09-30 23:55:19,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-30 23:55:19,430 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 375 transitions. [2018-09-30 23:55:19,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2018-09-30 23:55:19,431 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:55:19,431 INFO L375 BasicCegarLoop]: trace histogram [92, 92, 92, 92, 1, 1, 1, 1, 1, 1] [2018-09-30 23:55:19,432 INFO L423 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:55:19,432 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:55:19,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1998729308, now seen corresponding path program 92 times [2018-09-30 23:55:19,432 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:55:19,432 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:55:19,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:19,433 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:55:19,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:19,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:55:23,651 INFO L134 CoverageAnalysis]: Checked inductivity of 16836 backedges. 0 proven. 16836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:23,651 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:55:23,651 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:55:23,658 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:55:23,731 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:55:23,731 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:55:23,736 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:55:23,837 INFO L134 CoverageAnalysis]: Checked inductivity of 16836 backedges. 0 proven. 16836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:23,859 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:55:23,859 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-09-30 23:55:23,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-09-30 23:55:23,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-09-30 23:55:23,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-30 23:55:23,860 INFO L87 Difference]: Start difference. First operand 375 states and 375 transitions. Second operand 95 states. [2018-09-30 23:55:24,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:55:24,296 INFO L93 Difference]: Finished difference Result 381 states and 381 transitions. [2018-09-30 23:55:24,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-30 23:55:24,296 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 374 [2018-09-30 23:55:24,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:55:24,298 INFO L225 Difference]: With dead ends: 381 [2018-09-30 23:55:24,299 INFO L226 Difference]: Without dead ends: 379 [2018-09-30 23:55:24,299 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 374 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-30 23:55:24,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2018-09-30 23:55:24,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 379. [2018-09-30 23:55:24,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 379 states. [2018-09-30 23:55:24,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 379 transitions. [2018-09-30 23:55:24,303 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 379 transitions. Word has length 374 [2018-09-30 23:55:24,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:55:24,303 INFO L480 AbstractCegarLoop]: Abstraction has 379 states and 379 transitions. [2018-09-30 23:55:24,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-09-30 23:55:24,303 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 379 transitions. [2018-09-30 23:55:24,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2018-09-30 23:55:24,305 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:55:24,305 INFO L375 BasicCegarLoop]: trace histogram [93, 93, 93, 93, 1, 1, 1, 1, 1, 1] [2018-09-30 23:55:24,305 INFO L423 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:55:24,305 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:55:24,305 INFO L82 PathProgramCache]: Analyzing trace with hash 582396750, now seen corresponding path program 93 times [2018-09-30 23:55:24,305 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:55:24,305 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:55:24,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:24,306 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:55:24,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:24,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:55:27,738 INFO L134 CoverageAnalysis]: Checked inductivity of 17205 backedges. 0 proven. 17205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:27,739 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:55:27,739 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:55:27,747 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:55:27,909 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 94 check-sat command(s) [2018-09-30 23:55:27,910 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:55:27,914 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:55:28,013 INFO L134 CoverageAnalysis]: Checked inductivity of 17205 backedges. 0 proven. 17205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:28,033 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:55:28,034 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-09-30 23:55:28,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-30 23:55:28,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-30 23:55:28,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-30 23:55:28,035 INFO L87 Difference]: Start difference. First operand 379 states and 379 transitions. Second operand 96 states. [2018-09-30 23:55:28,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:55:28,298 INFO L93 Difference]: Finished difference Result 385 states and 385 transitions. [2018-09-30 23:55:28,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-30 23:55:28,298 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 378 [2018-09-30 23:55:28,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:55:28,300 INFO L225 Difference]: With dead ends: 385 [2018-09-30 23:55:28,301 INFO L226 Difference]: Without dead ends: 383 [2018-09-30 23:55:28,301 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-30 23:55:28,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2018-09-30 23:55:28,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 383. [2018-09-30 23:55:28,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2018-09-30 23:55:28,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 383 transitions. [2018-09-30 23:55:28,305 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 383 transitions. Word has length 378 [2018-09-30 23:55:28,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:55:28,305 INFO L480 AbstractCegarLoop]: Abstraction has 383 states and 383 transitions. [2018-09-30 23:55:28,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-30 23:55:28,305 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 383 transitions. [2018-09-30 23:55:28,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2018-09-30 23:55:28,306 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:55:28,307 INFO L375 BasicCegarLoop]: trace histogram [94, 94, 94, 94, 1, 1, 1, 1, 1, 1] [2018-09-30 23:55:28,307 INFO L423 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:55:28,307 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:55:28,307 INFO L82 PathProgramCache]: Analyzing trace with hash 671457784, now seen corresponding path program 94 times [2018-09-30 23:55:28,307 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:55:28,307 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:55:28,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:28,308 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:55:28,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:28,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:55:31,717 INFO L134 CoverageAnalysis]: Checked inductivity of 17578 backedges. 0 proven. 17578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:31,717 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:55:31,717 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:55:31,726 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:55:31,804 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:55:31,804 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:55:31,809 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:55:31,929 INFO L134 CoverageAnalysis]: Checked inductivity of 17578 backedges. 0 proven. 17578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:31,950 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:55:31,950 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-09-30 23:55:31,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-09-30 23:55:31,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-09-30 23:55:31,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-30 23:55:31,952 INFO L87 Difference]: Start difference. First operand 383 states and 383 transitions. Second operand 97 states. [2018-09-30 23:55:32,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:55:32,373 INFO L93 Difference]: Finished difference Result 389 states and 389 transitions. [2018-09-30 23:55:32,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-30 23:55:32,374 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 382 [2018-09-30 23:55:32,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:55:32,376 INFO L225 Difference]: With dead ends: 389 [2018-09-30 23:55:32,376 INFO L226 Difference]: Without dead ends: 387 [2018-09-30 23:55:32,377 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 382 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-30 23:55:32,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2018-09-30 23:55:32,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 387. [2018-09-30 23:55:32,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 387 states. [2018-09-30 23:55:32,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 387 transitions. [2018-09-30 23:55:32,380 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 387 transitions. Word has length 382 [2018-09-30 23:55:32,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:55:32,380 INFO L480 AbstractCegarLoop]: Abstraction has 387 states and 387 transitions. [2018-09-30 23:55:32,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-09-30 23:55:32,380 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 387 transitions. [2018-09-30 23:55:32,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2018-09-30 23:55:32,382 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:55:32,382 INFO L375 BasicCegarLoop]: trace histogram [95, 95, 95, 95, 1, 1, 1, 1, 1, 1] [2018-09-30 23:55:32,382 INFO L423 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:55:32,382 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:55:32,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1782920098, now seen corresponding path program 95 times [2018-09-30 23:55:32,382 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:55:32,383 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:55:32,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:32,383 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:55:32,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:32,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:55:35,711 INFO L134 CoverageAnalysis]: Checked inductivity of 17955 backedges. 0 proven. 17955 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:35,711 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:55:35,712 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:55:35,724 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:55:35,892 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 96 check-sat command(s) [2018-09-30 23:55:35,892 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:55:35,897 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:55:36,006 INFO L134 CoverageAnalysis]: Checked inductivity of 17955 backedges. 0 proven. 17955 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:36,028 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:55:36,028 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-09-30 23:55:36,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-30 23:55:36,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-30 23:55:36,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-09-30 23:55:36,029 INFO L87 Difference]: Start difference. First operand 387 states and 387 transitions. Second operand 98 states. [2018-09-30 23:55:36,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:55:36,508 INFO L93 Difference]: Finished difference Result 393 states and 393 transitions. [2018-09-30 23:55:36,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-30 23:55:36,509 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 386 [2018-09-30 23:55:36,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:55:36,511 INFO L225 Difference]: With dead ends: 393 [2018-09-30 23:55:36,511 INFO L226 Difference]: Without dead ends: 391 [2018-09-30 23:55:36,512 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-09-30 23:55:36,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2018-09-30 23:55:36,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 391. [2018-09-30 23:55:36,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 391 states. [2018-09-30 23:55:36,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 391 transitions. [2018-09-30 23:55:36,515 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 391 transitions. Word has length 386 [2018-09-30 23:55:36,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:55:36,515 INFO L480 AbstractCegarLoop]: Abstraction has 391 states and 391 transitions. [2018-09-30 23:55:36,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-30 23:55:36,516 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 391 transitions. [2018-09-30 23:55:36,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2018-09-30 23:55:36,517 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:55:36,517 INFO L375 BasicCegarLoop]: trace histogram [96, 96, 96, 96, 1, 1, 1, 1, 1, 1] [2018-09-30 23:55:36,517 INFO L423 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:55:36,517 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:55:36,518 INFO L82 PathProgramCache]: Analyzing trace with hash 2041569356, now seen corresponding path program 96 times [2018-09-30 23:55:36,518 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:55:36,518 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:55:36,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:36,518 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:55:36,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:36,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:55:40,223 INFO L134 CoverageAnalysis]: Checked inductivity of 18336 backedges. 0 proven. 18336 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:40,223 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:55:40,223 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:55:40,233 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:55:40,395 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 97 check-sat command(s) [2018-09-30 23:55:40,395 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:55:40,400 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:55:40,512 INFO L134 CoverageAnalysis]: Checked inductivity of 18336 backedges. 0 proven. 18336 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:40,533 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:55:40,533 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-09-30 23:55:40,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-09-30 23:55:40,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-09-30 23:55:40,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-09-30 23:55:40,535 INFO L87 Difference]: Start difference. First operand 391 states and 391 transitions. Second operand 99 states. [2018-09-30 23:55:40,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:55:40,972 INFO L93 Difference]: Finished difference Result 397 states and 397 transitions. [2018-09-30 23:55:40,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-30 23:55:40,972 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 390 [2018-09-30 23:55:40,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:55:40,974 INFO L225 Difference]: With dead ends: 397 [2018-09-30 23:55:40,974 INFO L226 Difference]: Without dead ends: 395 [2018-09-30 23:55:40,974 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 390 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-09-30 23:55:40,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2018-09-30 23:55:40,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 395. [2018-09-30 23:55:40,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 395 states. [2018-09-30 23:55:40,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 395 transitions. [2018-09-30 23:55:40,978 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 395 transitions. Word has length 390 [2018-09-30 23:55:40,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:55:40,978 INFO L480 AbstractCegarLoop]: Abstraction has 395 states and 395 transitions. [2018-09-30 23:55:40,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-09-30 23:55:40,978 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 395 transitions. [2018-09-30 23:55:40,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2018-09-30 23:55:40,980 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:55:40,980 INFO L375 BasicCegarLoop]: trace histogram [97, 97, 97, 97, 1, 1, 1, 1, 1, 1] [2018-09-30 23:55:40,980 INFO L423 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:55:40,980 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:55:40,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1161832438, now seen corresponding path program 97 times [2018-09-30 23:55:40,980 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:55:40,981 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:55:40,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:40,981 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:55:40,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:41,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:55:44,882 INFO L134 CoverageAnalysis]: Checked inductivity of 18721 backedges. 0 proven. 18721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:44,882 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:55:44,882 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:55:44,890 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:55:44,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:55:44,971 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:55:45,068 INFO L134 CoverageAnalysis]: Checked inductivity of 18721 backedges. 0 proven. 18721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:45,088 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:55:45,088 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-09-30 23:55:45,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-30 23:55:45,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-30 23:55:45,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-09-30 23:55:45,090 INFO L87 Difference]: Start difference. First operand 395 states and 395 transitions. Second operand 100 states. [2018-09-30 23:55:45,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:55:45,601 INFO L93 Difference]: Finished difference Result 401 states and 401 transitions. [2018-09-30 23:55:45,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-09-30 23:55:45,602 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 394 [2018-09-30 23:55:45,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:55:45,604 INFO L225 Difference]: With dead ends: 401 [2018-09-30 23:55:45,604 INFO L226 Difference]: Without dead ends: 399 [2018-09-30 23:55:45,605 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 394 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-09-30 23:55:45,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2018-09-30 23:55:45,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 399. [2018-09-30 23:55:45,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 399 states. [2018-09-30 23:55:45,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 399 transitions. [2018-09-30 23:55:45,609 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 399 transitions. Word has length 394 [2018-09-30 23:55:45,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:55:45,609 INFO L480 AbstractCegarLoop]: Abstraction has 399 states and 399 transitions. [2018-09-30 23:55:45,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-30 23:55:45,609 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 399 transitions. [2018-09-30 23:55:45,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2018-09-30 23:55:45,610 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:55:45,611 INFO L375 BasicCegarLoop]: trace histogram [98, 98, 98, 98, 1, 1, 1, 1, 1, 1] [2018-09-30 23:55:45,611 INFO L423 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:55:45,611 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:55:45,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1162835296, now seen corresponding path program 98 times [2018-09-30 23:55:45,611 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:55:45,611 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:55:45,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:45,612 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:55:45,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:45,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:55:49,571 INFO L134 CoverageAnalysis]: Checked inductivity of 19110 backedges. 0 proven. 19110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:49,571 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:55:49,572 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:55:49,579 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:55:49,655 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:55:49,655 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:55:49,660 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:55:49,761 INFO L134 CoverageAnalysis]: Checked inductivity of 19110 backedges. 0 proven. 19110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:49,781 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:55:49,782 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-09-30 23:55:49,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-30 23:55:49,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-30 23:55:49,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-09-30 23:55:49,783 INFO L87 Difference]: Start difference. First operand 399 states and 399 transitions. Second operand 101 states. [2018-09-30 23:55:50,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:55:50,282 INFO L93 Difference]: Finished difference Result 405 states and 405 transitions. [2018-09-30 23:55:50,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-09-30 23:55:50,283 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 398 [2018-09-30 23:55:50,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:55:50,285 INFO L225 Difference]: With dead ends: 405 [2018-09-30 23:55:50,285 INFO L226 Difference]: Without dead ends: 403 [2018-09-30 23:55:50,286 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 398 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-09-30 23:55:50,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2018-09-30 23:55:50,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 403. [2018-09-30 23:55:50,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 403 states. [2018-09-30 23:55:50,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 403 transitions. [2018-09-30 23:55:50,290 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 403 transitions. Word has length 398 [2018-09-30 23:55:50,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:55:50,290 INFO L480 AbstractCegarLoop]: Abstraction has 403 states and 403 transitions. [2018-09-30 23:55:50,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-30 23:55:50,290 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 403 transitions. [2018-09-30 23:55:50,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2018-09-30 23:55:50,292 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:55:50,292 INFO L375 BasicCegarLoop]: trace histogram [99, 99, 99, 99, 1, 1, 1, 1, 1, 1] [2018-09-30 23:55:50,292 INFO L423 AbstractCegarLoop]: === Iteration 101 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:55:50,293 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:55:50,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1719371850, now seen corresponding path program 99 times [2018-09-30 23:55:50,293 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:55:50,293 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:55:50,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:50,293 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:55:50,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:50,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:55:54,256 INFO L134 CoverageAnalysis]: Checked inductivity of 19503 backedges. 0 proven. 19503 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:54,256 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:55:54,256 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:55:54,264 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:55:54,445 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 100 check-sat command(s) [2018-09-30 23:55:54,446 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:55:54,451 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:55:54,568 INFO L134 CoverageAnalysis]: Checked inductivity of 19503 backedges. 0 proven. 19503 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:54,588 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:55:54,589 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-09-30 23:55:54,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-30 23:55:54,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-30 23:55:54,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-09-30 23:55:54,591 INFO L87 Difference]: Start difference. First operand 403 states and 403 transitions. Second operand 102 states. [2018-09-30 23:55:54,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:55:54,902 INFO L93 Difference]: Finished difference Result 409 states and 409 transitions. [2018-09-30 23:55:54,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-09-30 23:55:54,902 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 402 [2018-09-30 23:55:54,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:55:54,904 INFO L225 Difference]: With dead ends: 409 [2018-09-30 23:55:54,905 INFO L226 Difference]: Without dead ends: 407 [2018-09-30 23:55:54,906 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 402 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-09-30 23:55:54,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2018-09-30 23:55:54,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 407. [2018-09-30 23:55:54,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 407 states. [2018-09-30 23:55:54,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 407 transitions. [2018-09-30 23:55:54,910 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 407 transitions. Word has length 402 [2018-09-30 23:55:54,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:55:54,910 INFO L480 AbstractCegarLoop]: Abstraction has 407 states and 407 transitions. [2018-09-30 23:55:54,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-30 23:55:54,910 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 407 transitions. [2018-09-30 23:55:54,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2018-09-30 23:55:54,912 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:55:54,913 INFO L375 BasicCegarLoop]: trace histogram [100, 100, 100, 100, 1, 1, 1, 1, 1, 1] [2018-09-30 23:55:54,913 INFO L423 AbstractCegarLoop]: === Iteration 102 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:55:54,913 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:55:54,913 INFO L82 PathProgramCache]: Analyzing trace with hash 333160692, now seen corresponding path program 100 times [2018-09-30 23:55:54,913 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:55:54,914 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:55:54,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:54,914 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:55:54,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:54,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:55:59,136 INFO L134 CoverageAnalysis]: Checked inductivity of 19900 backedges. 0 proven. 19900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:59,137 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:55:59,137 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:55:59,145 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:55:59,229 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:55:59,229 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:55:59,234 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:55:59,353 INFO L134 CoverageAnalysis]: Checked inductivity of 19900 backedges. 0 proven. 19900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:59,373 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:55:59,374 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-09-30 23:55:59,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-09-30 23:55:59,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-09-30 23:55:59,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-09-30 23:55:59,375 INFO L87 Difference]: Start difference. First operand 407 states and 407 transitions. Second operand 103 states. [2018-09-30 23:55:59,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:55:59,885 INFO L93 Difference]: Finished difference Result 413 states and 413 transitions. [2018-09-30 23:55:59,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-30 23:55:59,885 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 406 [2018-09-30 23:55:59,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:55:59,887 INFO L225 Difference]: With dead ends: 413 [2018-09-30 23:55:59,887 INFO L226 Difference]: Without dead ends: 411 [2018-09-30 23:55:59,888 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 406 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-09-30 23:55:59,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2018-09-30 23:55:59,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 411. [2018-09-30 23:55:59,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 411 states. [2018-09-30 23:55:59,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 411 transitions. [2018-09-30 23:55:59,893 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 411 transitions. Word has length 406 [2018-09-30 23:55:59,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:55:59,893 INFO L480 AbstractCegarLoop]: Abstraction has 411 states and 411 transitions. [2018-09-30 23:55:59,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-09-30 23:55:59,893 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 411 transitions. [2018-09-30 23:55:59,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2018-09-30 23:55:59,895 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:55:59,895 INFO L375 BasicCegarLoop]: trace histogram [101, 101, 101, 101, 1, 1, 1, 1, 1, 1] [2018-09-30 23:55:59,896 INFO L423 AbstractCegarLoop]: === Iteration 103 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:55:59,896 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:55:59,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1825264798, now seen corresponding path program 101 times [2018-09-30 23:55:59,896 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:55:59,896 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:55:59,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:59,897 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:55:59,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:59,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:03,973 INFO L134 CoverageAnalysis]: Checked inductivity of 20301 backedges. 0 proven. 20301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:03,974 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:03,974 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:03,982 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:56:04,176 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 102 check-sat command(s) [2018-09-30 23:56:04,176 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:04,181 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:04,341 INFO L134 CoverageAnalysis]: Checked inductivity of 20301 backedges. 0 proven. 20301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:04,361 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:04,362 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-09-30 23:56:04,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-30 23:56:04,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-30 23:56:04,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-09-30 23:56:04,364 INFO L87 Difference]: Start difference. First operand 411 states and 411 transitions. Second operand 104 states. [2018-09-30 23:56:04,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:04,913 INFO L93 Difference]: Finished difference Result 417 states and 417 transitions. [2018-09-30 23:56:04,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-09-30 23:56:04,914 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 410 [2018-09-30 23:56:04,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:04,915 INFO L225 Difference]: With dead ends: 417 [2018-09-30 23:56:04,915 INFO L226 Difference]: Without dead ends: 415 [2018-09-30 23:56:04,916 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 410 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-09-30 23:56:04,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2018-09-30 23:56:04,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 415. [2018-09-30 23:56:04,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 415 states. [2018-09-30 23:56:04,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 415 transitions. [2018-09-30 23:56:04,920 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 415 transitions. Word has length 410 [2018-09-30 23:56:04,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:04,921 INFO L480 AbstractCegarLoop]: Abstraction has 415 states and 415 transitions. [2018-09-30 23:56:04,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-30 23:56:04,921 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 415 transitions. [2018-09-30 23:56:04,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2018-09-30 23:56:04,923 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:04,923 INFO L375 BasicCegarLoop]: trace histogram [102, 102, 102, 102, 1, 1, 1, 1, 1, 1] [2018-09-30 23:56:04,924 INFO L423 AbstractCegarLoop]: === Iteration 104 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:04,925 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:04,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1710939320, now seen corresponding path program 102 times [2018-09-30 23:56:04,925 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:04,925 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:04,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:04,926 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:04,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:04,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:08,989 INFO L134 CoverageAnalysis]: Checked inductivity of 20706 backedges. 0 proven. 20706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:08,989 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:08,989 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:08,996 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:56:09,194 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 103 check-sat command(s) [2018-09-30 23:56:09,194 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:09,200 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:09,343 INFO L134 CoverageAnalysis]: Checked inductivity of 20706 backedges. 0 proven. 20706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:09,363 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:09,363 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-09-30 23:56:09,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-09-30 23:56:09,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-09-30 23:56:09,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-09-30 23:56:09,365 INFO L87 Difference]: Start difference. First operand 415 states and 415 transitions. Second operand 105 states. [2018-09-30 23:56:09,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:09,870 INFO L93 Difference]: Finished difference Result 421 states and 421 transitions. [2018-09-30 23:56:09,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-09-30 23:56:09,871 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 414 [2018-09-30 23:56:09,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:09,872 INFO L225 Difference]: With dead ends: 421 [2018-09-30 23:56:09,872 INFO L226 Difference]: Without dead ends: 419 [2018-09-30 23:56:09,873 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 414 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-09-30 23:56:09,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2018-09-30 23:56:09,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 419. [2018-09-30 23:56:09,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 419 states. [2018-09-30 23:56:09,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 419 transitions. [2018-09-30 23:56:09,877 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 419 transitions. Word has length 414 [2018-09-30 23:56:09,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:09,877 INFO L480 AbstractCegarLoop]: Abstraction has 419 states and 419 transitions. [2018-09-30 23:56:09,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-09-30 23:56:09,877 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 419 transitions. [2018-09-30 23:56:09,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2018-09-30 23:56:09,879 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:09,879 INFO L375 BasicCegarLoop]: trace histogram [103, 103, 103, 103, 1, 1, 1, 1, 1, 1] [2018-09-30 23:56:09,879 INFO L423 AbstractCegarLoop]: === Iteration 105 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:09,880 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:09,880 INFO L82 PathProgramCache]: Analyzing trace with hash -486306574, now seen corresponding path program 103 times [2018-09-30 23:56:09,880 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:09,880 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:09,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:09,881 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:09,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:09,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:14,199 INFO L134 CoverageAnalysis]: Checked inductivity of 21115 backedges. 0 proven. 21115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:14,200 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:14,200 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:14,207 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:56:14,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:14,292 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:14,429 INFO L134 CoverageAnalysis]: Checked inductivity of 21115 backedges. 0 proven. 21115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:14,449 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:14,450 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-09-30 23:56:14,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-30 23:56:14,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-30 23:56:14,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-09-30 23:56:14,451 INFO L87 Difference]: Start difference. First operand 419 states and 419 transitions. Second operand 106 states. [2018-09-30 23:56:14,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:14,991 INFO L93 Difference]: Finished difference Result 425 states and 425 transitions. [2018-09-30 23:56:14,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-09-30 23:56:14,991 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 418 [2018-09-30 23:56:14,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:14,993 INFO L225 Difference]: With dead ends: 425 [2018-09-30 23:56:14,993 INFO L226 Difference]: Without dead ends: 423 [2018-09-30 23:56:14,994 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 418 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-09-30 23:56:14,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2018-09-30 23:56:14,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 423. [2018-09-30 23:56:14,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 423 states. [2018-09-30 23:56:14,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 423 transitions. [2018-09-30 23:56:14,998 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 423 transitions. Word has length 418 [2018-09-30 23:56:14,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:14,998 INFO L480 AbstractCegarLoop]: Abstraction has 423 states and 423 transitions. [2018-09-30 23:56:14,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-30 23:56:14,998 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 423 transitions. [2018-09-30 23:56:15,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2018-09-30 23:56:15,000 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:15,000 INFO L375 BasicCegarLoop]: trace histogram [104, 104, 104, 104, 1, 1, 1, 1, 1, 1] [2018-09-30 23:56:15,001 INFO L423 AbstractCegarLoop]: === Iteration 106 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:15,001 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:15,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1308692892, now seen corresponding path program 104 times [2018-09-30 23:56:15,001 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:15,001 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:15,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:15,002 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:56:15,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:15,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:19,263 INFO L134 CoverageAnalysis]: Checked inductivity of 21528 backedges. 0 proven. 21528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:19,263 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:19,263 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:19,270 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:56:19,353 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:56:19,353 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:19,358 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:19,556 INFO L134 CoverageAnalysis]: Checked inductivity of 21528 backedges. 0 proven. 21528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:19,580 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:19,581 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2018-09-30 23:56:19,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-09-30 23:56:19,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-09-30 23:56:19,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-09-30 23:56:19,582 INFO L87 Difference]: Start difference. First operand 423 states and 423 transitions. Second operand 107 states. [2018-09-30 23:56:20,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:20,147 INFO L93 Difference]: Finished difference Result 429 states and 429 transitions. [2018-09-30 23:56:20,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-09-30 23:56:20,148 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 422 [2018-09-30 23:56:20,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:20,149 INFO L225 Difference]: With dead ends: 429 [2018-09-30 23:56:20,149 INFO L226 Difference]: Without dead ends: 427 [2018-09-30 23:56:20,150 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 422 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-09-30 23:56:20,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2018-09-30 23:56:20,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 427. [2018-09-30 23:56:20,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427 states. [2018-09-30 23:56:20,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 427 transitions. [2018-09-30 23:56:20,153 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 427 transitions. Word has length 422 [2018-09-30 23:56:20,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:20,153 INFO L480 AbstractCegarLoop]: Abstraction has 427 states and 427 transitions. [2018-09-30 23:56:20,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-09-30 23:56:20,153 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 427 transitions. [2018-09-30 23:56:20,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2018-09-30 23:56:20,155 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:20,155 INFO L375 BasicCegarLoop]: trace histogram [105, 105, 105, 105, 1, 1, 1, 1, 1, 1] [2018-09-30 23:56:20,155 INFO L423 AbstractCegarLoop]: === Iteration 107 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:20,155 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:20,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1073230150, now seen corresponding path program 105 times [2018-09-30 23:56:20,155 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:20,155 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:20,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:20,156 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:20,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:20,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:24,547 INFO L134 CoverageAnalysis]: Checked inductivity of 21945 backedges. 0 proven. 21945 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:24,547 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:24,547 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:24,554 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:56:24,750 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 106 check-sat command(s) [2018-09-30 23:56:24,750 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:24,755 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:24,874 INFO L134 CoverageAnalysis]: Checked inductivity of 21945 backedges. 0 proven. 21945 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:24,895 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:24,895 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-09-30 23:56:24,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-30 23:56:24,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-30 23:56:24,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-09-30 23:56:24,897 INFO L87 Difference]: Start difference. First operand 427 states and 427 transitions. Second operand 108 states. [2018-09-30 23:56:25,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:25,300 INFO L93 Difference]: Finished difference Result 433 states and 433 transitions. [2018-09-30 23:56:25,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-09-30 23:56:25,300 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 426 [2018-09-30 23:56:25,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:25,302 INFO L225 Difference]: With dead ends: 433 [2018-09-30 23:56:25,302 INFO L226 Difference]: Without dead ends: 431 [2018-09-30 23:56:25,303 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 532 GetRequests, 426 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-09-30 23:56:25,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2018-09-30 23:56:25,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 431. [2018-09-30 23:56:25,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 431 states. [2018-09-30 23:56:25,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 431 transitions. [2018-09-30 23:56:25,306 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 431 transitions. Word has length 426 [2018-09-30 23:56:25,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:25,306 INFO L480 AbstractCegarLoop]: Abstraction has 431 states and 431 transitions. [2018-09-30 23:56:25,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-30 23:56:25,306 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 431 transitions. [2018-09-30 23:56:25,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2018-09-30 23:56:25,308 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:25,308 INFO L375 BasicCegarLoop]: trace histogram [106, 106, 106, 106, 1, 1, 1, 1, 1, 1] [2018-09-30 23:56:25,308 INFO L423 AbstractCegarLoop]: === Iteration 108 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:25,308 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:25,308 INFO L82 PathProgramCache]: Analyzing trace with hash 480472048, now seen corresponding path program 106 times [2018-09-30 23:56:25,308 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:25,308 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:25,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:25,309 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:25,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:25,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:29,863 INFO L134 CoverageAnalysis]: Checked inductivity of 22366 backedges. 0 proven. 22366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:29,864 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:29,864 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:29,872 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:56:29,962 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:56:29,963 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:29,968 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:30,093 INFO L134 CoverageAnalysis]: Checked inductivity of 22366 backedges. 0 proven. 22366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:30,115 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:30,115 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 108 [2018-09-30 23:56:30,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-09-30 23:56:30,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-09-30 23:56:30,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-09-30 23:56:30,116 INFO L87 Difference]: Start difference. First operand 431 states and 431 transitions. Second operand 109 states. [2018-09-30 23:56:30,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:30,754 INFO L93 Difference]: Finished difference Result 437 states and 437 transitions. [2018-09-30 23:56:30,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-09-30 23:56:30,755 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 430 [2018-09-30 23:56:30,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:30,756 INFO L225 Difference]: With dead ends: 437 [2018-09-30 23:56:30,756 INFO L226 Difference]: Without dead ends: 435 [2018-09-30 23:56:30,757 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 430 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-09-30 23:56:30,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2018-09-30 23:56:30,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 435. [2018-09-30 23:56:30,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 435 states. [2018-09-30 23:56:30,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 435 transitions. [2018-09-30 23:56:30,760 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 435 transitions. Word has length 430 [2018-09-30 23:56:30,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:30,761 INFO L480 AbstractCegarLoop]: Abstraction has 435 states and 435 transitions. [2018-09-30 23:56:30,761 INFO L481 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-09-30 23:56:30,761 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 435 transitions. [2018-09-30 23:56:30,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2018-09-30 23:56:30,762 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:30,762 INFO L375 BasicCegarLoop]: trace histogram [107, 107, 107, 107, 1, 1, 1, 1, 1, 1] [2018-09-30 23:56:30,762 INFO L423 AbstractCegarLoop]: === Iteration 109 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:30,762 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:30,763 INFO L82 PathProgramCache]: Analyzing trace with hash -427998822, now seen corresponding path program 107 times [2018-09-30 23:56:30,763 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:30,763 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:30,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:30,763 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:30,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:30,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:35,360 INFO L134 CoverageAnalysis]: Checked inductivity of 22791 backedges. 0 proven. 22791 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:35,360 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:35,360 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:35,367 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:56:35,569 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 108 check-sat command(s) [2018-09-30 23:56:35,569 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:35,575 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:35,708 INFO L134 CoverageAnalysis]: Checked inductivity of 22791 backedges. 0 proven. 22791 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:35,729 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:35,729 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109] total 109 [2018-09-30 23:56:35,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-09-30 23:56:35,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-09-30 23:56:35,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-09-30 23:56:35,731 INFO L87 Difference]: Start difference. First operand 435 states and 435 transitions. Second operand 110 states. [2018-09-30 23:56:36,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:36,261 INFO L93 Difference]: Finished difference Result 441 states and 441 transitions. [2018-09-30 23:56:36,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-09-30 23:56:36,262 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 434 [2018-09-30 23:56:36,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:36,263 INFO L225 Difference]: With dead ends: 441 [2018-09-30 23:56:36,263 INFO L226 Difference]: Without dead ends: 439 [2018-09-30 23:56:36,264 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 542 GetRequests, 434 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-09-30 23:56:36,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2018-09-30 23:56:36,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 439. [2018-09-30 23:56:36,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 439 states. [2018-09-30 23:56:36,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 439 transitions. [2018-09-30 23:56:36,267 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 439 transitions. Word has length 434 [2018-09-30 23:56:36,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:36,268 INFO L480 AbstractCegarLoop]: Abstraction has 439 states and 439 transitions. [2018-09-30 23:56:36,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-09-30 23:56:36,268 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 439 transitions. [2018-09-30 23:56:36,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2018-09-30 23:56:36,269 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:36,269 INFO L375 BasicCegarLoop]: trace histogram [108, 108, 108, 108, 1, 1, 1, 1, 1, 1] [2018-09-30 23:56:36,270 INFO L423 AbstractCegarLoop]: === Iteration 110 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:36,270 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:36,270 INFO L82 PathProgramCache]: Analyzing trace with hash -557829564, now seen corresponding path program 108 times [2018-09-30 23:56:36,270 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:36,270 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:36,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:36,271 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:36,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:36,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:40,958 INFO L134 CoverageAnalysis]: Checked inductivity of 23220 backedges. 0 proven. 23220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:40,959 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:40,959 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:40,968 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:56:41,160 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 109 check-sat command(s) [2018-09-30 23:56:41,160 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:41,165 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:41,300 INFO L134 CoverageAnalysis]: Checked inductivity of 23220 backedges. 0 proven. 23220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:41,321 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:41,321 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 110] total 110 [2018-09-30 23:56:41,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 111 states [2018-09-30 23:56:41,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2018-09-30 23:56:41,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-09-30 23:56:41,323 INFO L87 Difference]: Start difference. First operand 439 states and 439 transitions. Second operand 111 states. [2018-09-30 23:56:41,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:41,723 INFO L93 Difference]: Finished difference Result 445 states and 445 transitions. [2018-09-30 23:56:41,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-09-30 23:56:41,723 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 438 [2018-09-30 23:56:41,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:41,724 INFO L225 Difference]: With dead ends: 445 [2018-09-30 23:56:41,724 INFO L226 Difference]: Without dead ends: 443 [2018-09-30 23:56:41,725 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 547 GetRequests, 438 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-09-30 23:56:41,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2018-09-30 23:56:41,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 443. [2018-09-30 23:56:41,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 443 states. [2018-09-30 23:56:41,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 443 transitions. [2018-09-30 23:56:41,729 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 443 transitions. Word has length 438 [2018-09-30 23:56:41,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:41,729 INFO L480 AbstractCegarLoop]: Abstraction has 443 states and 443 transitions. [2018-09-30 23:56:41,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has 111 states. [2018-09-30 23:56:41,729 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 443 transitions. [2018-09-30 23:56:41,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2018-09-30 23:56:41,730 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:41,731 INFO L375 BasicCegarLoop]: trace histogram [109, 109, 109, 109, 1, 1, 1, 1, 1, 1] [2018-09-30 23:56:41,731 INFO L423 AbstractCegarLoop]: === Iteration 111 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:41,731 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:41,731 INFO L82 PathProgramCache]: Analyzing trace with hash 627490286, now seen corresponding path program 109 times [2018-09-30 23:56:41,731 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:41,731 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:41,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:41,732 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:41,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:41,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:46,400 INFO L134 CoverageAnalysis]: Checked inductivity of 23653 backedges. 0 proven. 23653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:46,400 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:46,400 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:46,407 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:56:46,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:46,496 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:46,635 INFO L134 CoverageAnalysis]: Checked inductivity of 23653 backedges. 0 proven. 23653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:46,656 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:46,657 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 111] total 111 [2018-09-30 23:56:46,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-09-30 23:56:46,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-09-30 23:56:46,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2018-09-30 23:56:46,658 INFO L87 Difference]: Start difference. First operand 443 states and 443 transitions. Second operand 112 states. [2018-09-30 23:56:47,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:47,117 INFO L93 Difference]: Finished difference Result 449 states and 449 transitions. [2018-09-30 23:56:47,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-09-30 23:56:47,117 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 442 [2018-09-30 23:56:47,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:47,119 INFO L225 Difference]: With dead ends: 449 [2018-09-30 23:56:47,119 INFO L226 Difference]: Without dead ends: 447 [2018-09-30 23:56:47,120 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 552 GetRequests, 442 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2018-09-30 23:56:47,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2018-09-30 23:56:47,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 447. [2018-09-30 23:56:47,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 447 states. [2018-09-30 23:56:47,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 447 transitions. [2018-09-30 23:56:47,122 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 447 transitions. Word has length 442 [2018-09-30 23:56:47,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:47,122 INFO L480 AbstractCegarLoop]: Abstraction has 447 states and 447 transitions. [2018-09-30 23:56:47,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-09-30 23:56:47,123 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 447 transitions. [2018-09-30 23:56:47,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2018-09-30 23:56:47,124 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:47,124 INFO L375 BasicCegarLoop]: trace histogram [110, 110, 110, 110, 1, 1, 1, 1, 1, 1] [2018-09-30 23:56:47,124 INFO L423 AbstractCegarLoop]: === Iteration 112 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:47,124 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:47,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1496016024, now seen corresponding path program 110 times [2018-09-30 23:56:47,125 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:47,125 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:47,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:47,125 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:56:47,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:47,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:51,852 INFO L134 CoverageAnalysis]: Checked inductivity of 24090 backedges. 0 proven. 24090 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:51,852 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:51,853 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:51,860 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:56:51,946 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:56:51,946 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:51,951 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:52,071 INFO L134 CoverageAnalysis]: Checked inductivity of 24090 backedges. 0 proven. 24090 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:52,091 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:52,091 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 112] total 112 [2018-09-30 23:56:52,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-09-30 23:56:52,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-09-30 23:56:52,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2018-09-30 23:56:52,093 INFO L87 Difference]: Start difference. First operand 447 states and 447 transitions. Second operand 113 states. [2018-09-30 23:56:52,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:52,748 INFO L93 Difference]: Finished difference Result 453 states and 453 transitions. [2018-09-30 23:56:52,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-09-30 23:56:52,748 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 446 [2018-09-30 23:56:52,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:52,749 INFO L225 Difference]: With dead ends: 453 [2018-09-30 23:56:52,750 INFO L226 Difference]: Without dead ends: 451 [2018-09-30 23:56:52,751 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 557 GetRequests, 446 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2018-09-30 23:56:52,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2018-09-30 23:56:52,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 451. [2018-09-30 23:56:52,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 451 states. [2018-09-30 23:56:52,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 451 transitions. [2018-09-30 23:56:52,753 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 451 transitions. Word has length 446 [2018-09-30 23:56:52,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:52,754 INFO L480 AbstractCegarLoop]: Abstraction has 451 states and 451 transitions. [2018-09-30 23:56:52,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-09-30 23:56:52,754 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 451 transitions. [2018-09-30 23:56:52,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2018-09-30 23:56:52,755 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:52,755 INFO L375 BasicCegarLoop]: trace histogram [111, 111, 111, 111, 1, 1, 1, 1, 1, 1] [2018-09-30 23:56:52,756 INFO L423 AbstractCegarLoop]: === Iteration 113 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:52,756 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:52,756 INFO L82 PathProgramCache]: Analyzing trace with hash 931702338, now seen corresponding path program 111 times [2018-09-30 23:56:52,756 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:52,756 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:52,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:52,757 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:52,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:52,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:57,600 INFO L134 CoverageAnalysis]: Checked inductivity of 24531 backedges. 0 proven. 24531 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:57,600 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:57,600 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:57,607 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:56:57,831 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 112 check-sat command(s) [2018-09-30 23:56:57,831 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:57,836 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:57,981 INFO L134 CoverageAnalysis]: Checked inductivity of 24531 backedges. 0 proven. 24531 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:58,001 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:58,002 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 113] total 113 [2018-09-30 23:56:58,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-09-30 23:56:58,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-09-30 23:56:58,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6441, Invalid=6441, Unknown=0, NotChecked=0, Total=12882 [2018-09-30 23:56:58,004 INFO L87 Difference]: Start difference. First operand 451 states and 451 transitions. Second operand 114 states. [2018-09-30 23:56:58,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:58,636 INFO L93 Difference]: Finished difference Result 457 states and 457 transitions. [2018-09-30 23:56:58,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2018-09-30 23:56:58,636 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 450 [2018-09-30 23:56:58,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:58,637 INFO L225 Difference]: With dead ends: 457 [2018-09-30 23:56:58,637 INFO L226 Difference]: Without dead ends: 455 [2018-09-30 23:56:58,638 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 562 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=6441, Invalid=6441, Unknown=0, NotChecked=0, Total=12882 [2018-09-30 23:56:58,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2018-09-30 23:56:58,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 455. [2018-09-30 23:56:58,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 455 states. [2018-09-30 23:56:58,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 455 transitions. [2018-09-30 23:56:58,641 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 455 transitions. Word has length 450 [2018-09-30 23:56:58,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:58,641 INFO L480 AbstractCegarLoop]: Abstraction has 455 states and 455 transitions. [2018-09-30 23:56:58,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-09-30 23:56:58,641 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 455 transitions. [2018-09-30 23:56:58,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2018-09-30 23:56:58,643 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:58,643 INFO L375 BasicCegarLoop]: trace histogram [112, 112, 112, 112, 1, 1, 1, 1, 1, 1] [2018-09-30 23:56:58,643 INFO L423 AbstractCegarLoop]: === Iteration 114 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:58,643 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:58,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1018757868, now seen corresponding path program 112 times [2018-09-30 23:56:58,644 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:58,644 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:58,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:58,644 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:58,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:58,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:03,385 INFO L134 CoverageAnalysis]: Checked inductivity of 24976 backedges. 0 proven. 24976 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:03,385 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:03,385 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:03,392 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:57:03,487 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:57:03,487 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:03,492 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:03,635 INFO L134 CoverageAnalysis]: Checked inductivity of 24976 backedges. 0 proven. 24976 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:03,655 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:03,656 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [114, 114] total 114 [2018-09-30 23:57:03,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 115 states [2018-09-30 23:57:03,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2018-09-30 23:57:03,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6555, Invalid=6555, Unknown=0, NotChecked=0, Total=13110 [2018-09-30 23:57:03,657 INFO L87 Difference]: Start difference. First operand 455 states and 455 transitions. Second operand 115 states. [2018-09-30 23:57:04,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:04,249 INFO L93 Difference]: Finished difference Result 461 states and 461 transitions. [2018-09-30 23:57:04,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2018-09-30 23:57:04,249 INFO L78 Accepts]: Start accepts. Automaton has 115 states. Word has length 454 [2018-09-30 23:57:04,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:04,251 INFO L225 Difference]: With dead ends: 461 [2018-09-30 23:57:04,251 INFO L226 Difference]: Without dead ends: 459 [2018-09-30 23:57:04,252 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 567 GetRequests, 454 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=6555, Invalid=6555, Unknown=0, NotChecked=0, Total=13110 [2018-09-30 23:57:04,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2018-09-30 23:57:04,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 459. [2018-09-30 23:57:04,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 459 states. [2018-09-30 23:57:04,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 459 transitions. [2018-09-30 23:57:04,255 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 459 transitions. Word has length 454 [2018-09-30 23:57:04,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:04,256 INFO L480 AbstractCegarLoop]: Abstraction has 459 states and 459 transitions. [2018-09-30 23:57:04,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has 115 states. [2018-09-30 23:57:04,256 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 459 transitions. [2018-09-30 23:57:04,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2018-09-30 23:57:04,257 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:04,257 INFO L375 BasicCegarLoop]: trace histogram [113, 113, 113, 113, 1, 1, 1, 1, 1, 1] [2018-09-30 23:57:04,258 INFO L423 AbstractCegarLoop]: === Iteration 115 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:04,258 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:04,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1136065174, now seen corresponding path program 113 times [2018-09-30 23:57:04,258 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:04,258 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:04,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:04,259 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:04,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:04,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:09,194 INFO L134 CoverageAnalysis]: Checked inductivity of 25425 backedges. 0 proven. 25425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:09,194 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:09,194 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:09,201 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:57:09,435 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 114 check-sat command(s) [2018-09-30 23:57:09,435 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:09,440 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:09,605 INFO L134 CoverageAnalysis]: Checked inductivity of 25425 backedges. 0 proven. 25425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:09,625 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:09,626 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [115, 115] total 115 [2018-09-30 23:57:09,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-09-30 23:57:09,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-09-30 23:57:09,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6670, Invalid=6670, Unknown=0, NotChecked=0, Total=13340 [2018-09-30 23:57:09,627 INFO L87 Difference]: Start difference. First operand 459 states and 459 transitions. Second operand 116 states. [2018-09-30 23:57:09,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:09,984 INFO L93 Difference]: Finished difference Result 465 states and 465 transitions. [2018-09-30 23:57:09,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2018-09-30 23:57:09,985 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 458 [2018-09-30 23:57:09,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:09,986 INFO L225 Difference]: With dead ends: 465 [2018-09-30 23:57:09,986 INFO L226 Difference]: Without dead ends: 463 [2018-09-30 23:57:09,987 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 572 GetRequests, 458 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=6670, Invalid=6670, Unknown=0, NotChecked=0, Total=13340 [2018-09-30 23:57:09,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2018-09-30 23:57:09,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 463. [2018-09-30 23:57:09,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 463 states. [2018-09-30 23:57:09,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 463 transitions. [2018-09-30 23:57:09,990 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 463 transitions. Word has length 458 [2018-09-30 23:57:09,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:09,990 INFO L480 AbstractCegarLoop]: Abstraction has 463 states and 463 transitions. [2018-09-30 23:57:09,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-09-30 23:57:09,991 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 463 transitions. [2018-09-30 23:57:09,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2018-09-30 23:57:09,992 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:09,993 INFO L375 BasicCegarLoop]: trace histogram [114, 114, 114, 114, 1, 1, 1, 1, 1, 1] [2018-09-30 23:57:09,993 INFO L423 AbstractCegarLoop]: === Iteration 116 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:09,993 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:09,993 INFO L82 PathProgramCache]: Analyzing trace with hash 641535296, now seen corresponding path program 114 times [2018-09-30 23:57:09,993 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:09,993 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:09,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:09,994 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:09,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:10,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:15,028 INFO L134 CoverageAnalysis]: Checked inductivity of 25878 backedges. 0 proven. 25878 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:15,028 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:15,029 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:15,035 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:57:15,245 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 115 check-sat command(s) [2018-09-30 23:57:15,245 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:15,251 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:15,401 INFO L134 CoverageAnalysis]: Checked inductivity of 25878 backedges. 0 proven. 25878 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:15,422 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:15,422 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [116, 116] total 116 [2018-09-30 23:57:15,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 117 states [2018-09-30 23:57:15,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2018-09-30 23:57:15,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6786, Invalid=6786, Unknown=0, NotChecked=0, Total=13572 [2018-09-30 23:57:15,424 INFO L87 Difference]: Start difference. First operand 463 states and 463 transitions. Second operand 117 states. [2018-09-30 23:57:16,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:16,017 INFO L93 Difference]: Finished difference Result 469 states and 469 transitions. [2018-09-30 23:57:16,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2018-09-30 23:57:16,017 INFO L78 Accepts]: Start accepts. Automaton has 117 states. Word has length 462 [2018-09-30 23:57:16,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:16,018 INFO L225 Difference]: With dead ends: 469 [2018-09-30 23:57:16,018 INFO L226 Difference]: Without dead ends: 467 [2018-09-30 23:57:16,019 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 577 GetRequests, 462 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=6786, Invalid=6786, Unknown=0, NotChecked=0, Total=13572 [2018-09-30 23:57:16,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2018-09-30 23:57:16,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 467. [2018-09-30 23:57:16,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 467 states. [2018-09-30 23:57:16,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 467 transitions. [2018-09-30 23:57:16,023 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 467 transitions. Word has length 462 [2018-09-30 23:57:16,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:16,023 INFO L480 AbstractCegarLoop]: Abstraction has 467 states and 467 transitions. [2018-09-30 23:57:16,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has 117 states. [2018-09-30 23:57:16,023 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 467 transitions. [2018-09-30 23:57:16,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 467 [2018-09-30 23:57:16,025 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:16,025 INFO L375 BasicCegarLoop]: trace histogram [115, 115, 115, 115, 1, 1, 1, 1, 1, 1] [2018-09-30 23:57:16,026 INFO L423 AbstractCegarLoop]: === Iteration 117 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:16,026 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:16,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1556462314, now seen corresponding path program 115 times [2018-09-30 23:57:16,026 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:16,026 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:16,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:16,027 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:16,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:16,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:21,303 INFO L134 CoverageAnalysis]: Checked inductivity of 26335 backedges. 0 proven. 26335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:21,303 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:21,304 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:21,310 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:57:21,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:21,403 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:21,575 INFO L134 CoverageAnalysis]: Checked inductivity of 26335 backedges. 0 proven. 26335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:21,596 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:21,596 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 117] total 117 [2018-09-30 23:57:21,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-09-30 23:57:21,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-09-30 23:57:21,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6903, Invalid=6903, Unknown=0, NotChecked=0, Total=13806 [2018-09-30 23:57:21,598 INFO L87 Difference]: Start difference. First operand 467 states and 467 transitions. Second operand 118 states. [2018-09-30 23:57:21,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:21,957 INFO L93 Difference]: Finished difference Result 473 states and 473 transitions. [2018-09-30 23:57:21,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2018-09-30 23:57:21,958 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 466 [2018-09-30 23:57:21,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:21,959 INFO L225 Difference]: With dead ends: 473 [2018-09-30 23:57:21,959 INFO L226 Difference]: Without dead ends: 471 [2018-09-30 23:57:21,960 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 582 GetRequests, 466 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=6903, Invalid=6903, Unknown=0, NotChecked=0, Total=13806 [2018-09-30 23:57:21,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2018-09-30 23:57:21,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 471. [2018-09-30 23:57:21,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 471 states. [2018-09-30 23:57:21,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 471 transitions. [2018-09-30 23:57:21,964 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 471 transitions. Word has length 466 [2018-09-30 23:57:21,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:21,964 INFO L480 AbstractCegarLoop]: Abstraction has 471 states and 471 transitions. [2018-09-30 23:57:21,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-09-30 23:57:21,964 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 471 transitions. [2018-09-30 23:57:21,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2018-09-30 23:57:21,966 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:21,966 INFO L375 BasicCegarLoop]: trace histogram [116, 116, 116, 116, 1, 1, 1, 1, 1, 1] [2018-09-30 23:57:21,966 INFO L423 AbstractCegarLoop]: === Iteration 118 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:21,966 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:21,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1635023980, now seen corresponding path program 116 times [2018-09-30 23:57:21,966 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:21,966 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:21,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:21,967 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:57:21,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:22,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:27,140 INFO L134 CoverageAnalysis]: Checked inductivity of 26796 backedges. 0 proven. 26796 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:27,140 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:27,140 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:27,148 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:57:27,237 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:57:27,238 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:27,242 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:27,398 INFO L134 CoverageAnalysis]: Checked inductivity of 26796 backedges. 0 proven. 26796 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:27,418 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:27,418 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [118, 118] total 118 [2018-09-30 23:57:27,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 119 states [2018-09-30 23:57:27,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2018-09-30 23:57:27,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7021, Invalid=7021, Unknown=0, NotChecked=0, Total=14042 [2018-09-30 23:57:27,420 INFO L87 Difference]: Start difference. First operand 471 states and 471 transitions. Second operand 119 states. [2018-09-30 23:57:28,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:28,013 INFO L93 Difference]: Finished difference Result 477 states and 477 transitions. [2018-09-30 23:57:28,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2018-09-30 23:57:28,014 INFO L78 Accepts]: Start accepts. Automaton has 119 states. Word has length 470 [2018-09-30 23:57:28,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:28,015 INFO L225 Difference]: With dead ends: 477 [2018-09-30 23:57:28,015 INFO L226 Difference]: Without dead ends: 475 [2018-09-30 23:57:28,016 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 587 GetRequests, 470 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=7021, Invalid=7021, Unknown=0, NotChecked=0, Total=14042 [2018-09-30 23:57:28,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2018-09-30 23:57:28,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 475. [2018-09-30 23:57:28,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 475 states. [2018-09-30 23:57:28,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 475 transitions. [2018-09-30 23:57:28,019 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 475 transitions. Word has length 470 [2018-09-30 23:57:28,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:28,020 INFO L480 AbstractCegarLoop]: Abstraction has 475 states and 475 transitions. [2018-09-30 23:57:28,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has 119 states. [2018-09-30 23:57:28,020 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 475 transitions. [2018-09-30 23:57:28,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2018-09-30 23:57:28,022 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:28,022 INFO L375 BasicCegarLoop]: trace histogram [117, 117, 117, 117, 1, 1, 1, 1, 1, 1] [2018-09-30 23:57:28,022 INFO L423 AbstractCegarLoop]: === Iteration 119 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:28,023 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:28,023 INFO L82 PathProgramCache]: Analyzing trace with hash -2121734338, now seen corresponding path program 117 times [2018-09-30 23:57:28,023 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:28,023 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:28,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:28,024 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:28,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:28,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:33,364 INFO L134 CoverageAnalysis]: Checked inductivity of 27261 backedges. 0 proven. 27261 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:33,364 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:33,364 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:33,371 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:57:33,607 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 118 check-sat command(s) [2018-09-30 23:57:33,608 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:33,612 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:33,768 INFO L134 CoverageAnalysis]: Checked inductivity of 27261 backedges. 0 proven. 27261 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:33,788 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:33,788 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [119, 119] total 119 [2018-09-30 23:57:33,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-09-30 23:57:33,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-09-30 23:57:33,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7140, Invalid=7140, Unknown=0, NotChecked=0, Total=14280 [2018-09-30 23:57:33,790 INFO L87 Difference]: Start difference. First operand 475 states and 475 transitions. Second operand 120 states. [2018-09-30 23:57:34,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:34,601 INFO L93 Difference]: Finished difference Result 481 states and 481 transitions. [2018-09-30 23:57:34,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2018-09-30 23:57:34,601 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 474 [2018-09-30 23:57:34,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:34,602 INFO L225 Difference]: With dead ends: 481 [2018-09-30 23:57:34,602 INFO L226 Difference]: Without dead ends: 479 [2018-09-30 23:57:34,603 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 592 GetRequests, 474 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=7140, Invalid=7140, Unknown=0, NotChecked=0, Total=14280 [2018-09-30 23:57:34,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2018-09-30 23:57:34,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 479. [2018-09-30 23:57:34,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 479 states. [2018-09-30 23:57:34,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 479 transitions. [2018-09-30 23:57:34,607 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 479 transitions. Word has length 474 [2018-09-30 23:57:34,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:34,607 INFO L480 AbstractCegarLoop]: Abstraction has 479 states and 479 transitions. [2018-09-30 23:57:34,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-09-30 23:57:34,607 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 479 transitions. [2018-09-30 23:57:34,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2018-09-30 23:57:34,609 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:34,609 INFO L375 BasicCegarLoop]: trace histogram [118, 118, 118, 118, 1, 1, 1, 1, 1, 1] [2018-09-30 23:57:34,609 INFO L423 AbstractCegarLoop]: === Iteration 120 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:34,609 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:34,609 INFO L82 PathProgramCache]: Analyzing trace with hash 444098024, now seen corresponding path program 118 times [2018-09-30 23:57:34,609 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:34,610 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:34,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:34,610 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:34,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:34,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:40,082 INFO L134 CoverageAnalysis]: Checked inductivity of 27730 backedges. 0 proven. 27730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:40,082 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:40,082 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:40,089 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:57:40,190 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:57:40,190 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:40,196 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:40,366 INFO L134 CoverageAnalysis]: Checked inductivity of 27730 backedges. 0 proven. 27730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:40,387 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:40,387 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [120, 120] total 120 [2018-09-30 23:57:40,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 121 states [2018-09-30 23:57:40,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2018-09-30 23:57:40,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7260, Invalid=7260, Unknown=0, NotChecked=0, Total=14520 [2018-09-30 23:57:40,388 INFO L87 Difference]: Start difference. First operand 479 states and 479 transitions. Second operand 121 states. [2018-09-30 23:57:40,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:40,812 INFO L93 Difference]: Finished difference Result 485 states and 485 transitions. [2018-09-30 23:57:40,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-09-30 23:57:40,812 INFO L78 Accepts]: Start accepts. Automaton has 121 states. Word has length 478 [2018-09-30 23:57:40,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:40,814 INFO L225 Difference]: With dead ends: 485 [2018-09-30 23:57:40,814 INFO L226 Difference]: Without dead ends: 483 [2018-09-30 23:57:40,816 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 597 GetRequests, 478 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=7260, Invalid=7260, Unknown=0, NotChecked=0, Total=14520 [2018-09-30 23:57:40,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2018-09-30 23:57:40,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 483. [2018-09-30 23:57:40,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 483 states. [2018-09-30 23:57:40,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 483 transitions. [2018-09-30 23:57:40,820 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 483 transitions. Word has length 478 [2018-09-30 23:57:40,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:40,820 INFO L480 AbstractCegarLoop]: Abstraction has 483 states and 483 transitions. [2018-09-30 23:57:40,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has 121 states. [2018-09-30 23:57:40,820 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 483 transitions. [2018-09-30 23:57:40,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2018-09-30 23:57:40,823 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:40,823 INFO L375 BasicCegarLoop]: trace histogram [119, 119, 119, 119, 1, 1, 1, 1, 1, 1] [2018-09-30 23:57:40,823 INFO L423 AbstractCegarLoop]: === Iteration 121 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:40,823 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:40,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1663795310, now seen corresponding path program 119 times [2018-09-30 23:57:40,824 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:40,824 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:40,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:40,824 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:40,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:40,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:46,348 INFO L134 CoverageAnalysis]: Checked inductivity of 28203 backedges. 0 proven. 28203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:46,348 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:46,348 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:46,356 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:57:46,601 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 120 check-sat command(s) [2018-09-30 23:57:46,601 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:46,606 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:46,776 INFO L134 CoverageAnalysis]: Checked inductivity of 28203 backedges. 0 proven. 28203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:46,796 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:46,797 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [121, 121] total 121 [2018-09-30 23:57:46,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-09-30 23:57:46,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-09-30 23:57:46,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7381, Invalid=7381, Unknown=0, NotChecked=0, Total=14762 [2018-09-30 23:57:46,798 INFO L87 Difference]: Start difference. First operand 483 states and 483 transitions. Second operand 122 states. [2018-09-30 23:57:47,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:47,366 INFO L93 Difference]: Finished difference Result 489 states and 489 transitions. [2018-09-30 23:57:47,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2018-09-30 23:57:47,367 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 482 [2018-09-30 23:57:47,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:47,368 INFO L225 Difference]: With dead ends: 489 [2018-09-30 23:57:47,368 INFO L226 Difference]: Without dead ends: 487 [2018-09-30 23:57:47,369 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 602 GetRequests, 482 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=7381, Invalid=7381, Unknown=0, NotChecked=0, Total=14762 [2018-09-30 23:57:47,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2018-09-30 23:57:47,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 487. [2018-09-30 23:57:47,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 487 states. [2018-09-30 23:57:47,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 487 transitions. [2018-09-30 23:57:47,371 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 487 transitions. Word has length 482 [2018-09-30 23:57:47,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:47,372 INFO L480 AbstractCegarLoop]: Abstraction has 487 states and 487 transitions. [2018-09-30 23:57:47,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-09-30 23:57:47,372 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 487 transitions. [2018-09-30 23:57:47,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2018-09-30 23:57:47,373 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:47,374 INFO L375 BasicCegarLoop]: trace histogram [120, 120, 120, 120, 1, 1, 1, 1, 1, 1] [2018-09-30 23:57:47,374 INFO L423 AbstractCegarLoop]: === Iteration 122 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:47,374 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:47,374 INFO L82 PathProgramCache]: Analyzing trace with hash -86526916, now seen corresponding path program 120 times [2018-09-30 23:57:47,374 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:47,374 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:47,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:47,375 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:47,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:47,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:53,060 INFO L134 CoverageAnalysis]: Checked inductivity of 28680 backedges. 0 proven. 28680 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:53,060 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:53,060 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:53,067 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:57:53,297 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 121 check-sat command(s) [2018-09-30 23:57:53,297 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:53,302 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:53,448 INFO L134 CoverageAnalysis]: Checked inductivity of 28680 backedges. 0 proven. 28680 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:53,468 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:53,469 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [122, 122] total 122 [2018-09-30 23:57:53,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 123 states [2018-09-30 23:57:53,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2018-09-30 23:57:53,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7503, Invalid=7503, Unknown=0, NotChecked=0, Total=15006 [2018-09-30 23:57:53,470 INFO L87 Difference]: Start difference. First operand 487 states and 487 transitions. Second operand 123 states. [2018-09-30 23:57:54,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:54,302 INFO L93 Difference]: Finished difference Result 493 states and 493 transitions. [2018-09-30 23:57:54,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2018-09-30 23:57:54,302 INFO L78 Accepts]: Start accepts. Automaton has 123 states. Word has length 486 [2018-09-30 23:57:54,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:54,303 INFO L225 Difference]: With dead ends: 493 [2018-09-30 23:57:54,303 INFO L226 Difference]: Without dead ends: 491 [2018-09-30 23:57:54,304 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 486 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=7503, Invalid=7503, Unknown=0, NotChecked=0, Total=15006 [2018-09-30 23:57:54,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2018-09-30 23:57:54,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 491. [2018-09-30 23:57:54,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 491 states. [2018-09-30 23:57:54,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 491 transitions. [2018-09-30 23:57:54,307 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 491 transitions. Word has length 486 [2018-09-30 23:57:54,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:54,307 INFO L480 AbstractCegarLoop]: Abstraction has 491 states and 491 transitions. [2018-09-30 23:57:54,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has 123 states. [2018-09-30 23:57:54,307 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 491 transitions. [2018-09-30 23:57:54,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2018-09-30 23:57:54,309 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:54,309 INFO L375 BasicCegarLoop]: trace histogram [121, 121, 121, 121, 1, 1, 1, 1, 1, 1] [2018-09-30 23:57:54,309 INFO L423 AbstractCegarLoop]: === Iteration 123 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:54,309 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:54,309 INFO L82 PathProgramCache]: Analyzing trace with hash -2055437338, now seen corresponding path program 121 times [2018-09-30 23:57:54,310 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:54,310 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:54,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:54,310 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:54,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:54,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:00,369 INFO L134 CoverageAnalysis]: Checked inductivity of 29161 backedges. 0 proven. 29161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:00,369 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:00,369 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:00,377 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:58:00,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:00,480 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:00,744 INFO L134 CoverageAnalysis]: Checked inductivity of 29161 backedges. 0 proven. 29161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:00,764 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:00,765 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [123, 123] total 123 [2018-09-30 23:58:00,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-09-30 23:58:00,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-09-30 23:58:00,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7626, Invalid=7626, Unknown=0, NotChecked=0, Total=15252 [2018-09-30 23:58:00,767 INFO L87 Difference]: Start difference. First operand 491 states and 491 transitions. Second operand 124 states. [2018-09-30 23:58:01,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:01,517 INFO L93 Difference]: Finished difference Result 497 states and 497 transitions. [2018-09-30 23:58:01,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2018-09-30 23:58:01,517 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 490 [2018-09-30 23:58:01,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:01,519 INFO L225 Difference]: With dead ends: 497 [2018-09-30 23:58:01,519 INFO L226 Difference]: Without dead ends: 495 [2018-09-30 23:58:01,520 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 612 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=7626, Invalid=7626, Unknown=0, NotChecked=0, Total=15252 [2018-09-30 23:58:01,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2018-09-30 23:58:01,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 495. [2018-09-30 23:58:01,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 495 states. [2018-09-30 23:58:01,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 495 transitions. [2018-09-30 23:58:01,523 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 495 transitions. Word has length 490 [2018-09-30 23:58:01,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:01,524 INFO L480 AbstractCegarLoop]: Abstraction has 495 states and 495 transitions. [2018-09-30 23:58:01,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-09-30 23:58:01,524 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 495 transitions. [2018-09-30 23:58:01,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2018-09-30 23:58:01,526 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:01,526 INFO L375 BasicCegarLoop]: trace histogram [122, 122, 122, 122, 1, 1, 1, 1, 1, 1] [2018-09-30 23:58:01,527 INFO L423 AbstractCegarLoop]: === Iteration 124 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:01,527 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:01,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1937936752, now seen corresponding path program 122 times [2018-09-30 23:58:01,527 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:01,527 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:01,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:01,528 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:58:01,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:01,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:07,467 INFO L134 CoverageAnalysis]: Checked inductivity of 29646 backedges. 0 proven. 29646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:07,467 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:07,467 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:07,475 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:58:07,568 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:58:07,568 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:07,573 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:07,746 INFO L134 CoverageAnalysis]: Checked inductivity of 29646 backedges. 0 proven. 29646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:07,766 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:07,767 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [124, 124] total 124 [2018-09-30 23:58:07,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 125 states [2018-09-30 23:58:07,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2018-09-30 23:58:07,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7750, Invalid=7750, Unknown=0, NotChecked=0, Total=15500 [2018-09-30 23:58:07,768 INFO L87 Difference]: Start difference. First operand 495 states and 495 transitions. Second operand 125 states. [2018-09-30 23:58:08,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:08,252 INFO L93 Difference]: Finished difference Result 501 states and 501 transitions. [2018-09-30 23:58:08,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2018-09-30 23:58:08,252 INFO L78 Accepts]: Start accepts. Automaton has 125 states. Word has length 494 [2018-09-30 23:58:08,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:08,254 INFO L225 Difference]: With dead ends: 501 [2018-09-30 23:58:08,254 INFO L226 Difference]: Without dead ends: 499 [2018-09-30 23:58:08,255 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 617 GetRequests, 494 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=7750, Invalid=7750, Unknown=0, NotChecked=0, Total=15500 [2018-09-30 23:58:08,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2018-09-30 23:58:08,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 499. [2018-09-30 23:58:08,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 499 states. [2018-09-30 23:58:08,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 499 transitions. [2018-09-30 23:58:08,260 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 499 transitions. Word has length 494 [2018-09-30 23:58:08,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:08,260 INFO L480 AbstractCegarLoop]: Abstraction has 499 states and 499 transitions. [2018-09-30 23:58:08,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has 125 states. [2018-09-30 23:58:08,260 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 499 transitions. [2018-09-30 23:58:08,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2018-09-30 23:58:08,263 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:08,263 INFO L375 BasicCegarLoop]: trace histogram [123, 123, 123, 123, 1, 1, 1, 1, 1, 1] [2018-09-30 23:58:08,263 INFO L423 AbstractCegarLoop]: === Iteration 125 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:08,263 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:08,263 INFO L82 PathProgramCache]: Analyzing trace with hash -27986886, now seen corresponding path program 123 times [2018-09-30 23:58:08,264 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:08,264 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:08,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:08,264 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:08,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:08,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:14,155 INFO L134 CoverageAnalysis]: Checked inductivity of 30135 backedges. 0 proven. 30135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:14,156 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:14,156 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:14,164 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:58:14,424 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 124 check-sat command(s) [2018-09-30 23:58:14,424 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:14,429 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:14,605 INFO L134 CoverageAnalysis]: Checked inductivity of 30135 backedges. 0 proven. 30135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:14,627 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:14,627 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [125, 125] total 125 [2018-09-30 23:58:14,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-09-30 23:58:14,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-09-30 23:58:14,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7875, Invalid=7875, Unknown=0, NotChecked=0, Total=15750 [2018-09-30 23:58:14,629 INFO L87 Difference]: Start difference. First operand 499 states and 499 transitions. Second operand 126 states. [2018-09-30 23:58:15,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:15,148 INFO L93 Difference]: Finished difference Result 505 states and 505 transitions. [2018-09-30 23:58:15,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2018-09-30 23:58:15,148 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 498 [2018-09-30 23:58:15,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:15,149 INFO L225 Difference]: With dead ends: 505 [2018-09-30 23:58:15,149 INFO L226 Difference]: Without dead ends: 503 [2018-09-30 23:58:15,149 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 622 GetRequests, 498 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=7875, Invalid=7875, Unknown=0, NotChecked=0, Total=15750 [2018-09-30 23:58:15,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2018-09-30 23:58:15,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 503. [2018-09-30 23:58:15,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 503 states. [2018-09-30 23:58:15,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 503 transitions. [2018-09-30 23:58:15,152 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 503 transitions. Word has length 498 [2018-09-30 23:58:15,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:15,152 INFO L480 AbstractCegarLoop]: Abstraction has 503 states and 503 transitions. [2018-09-30 23:58:15,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-09-30 23:58:15,152 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 503 transitions. [2018-09-30 23:58:15,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2018-09-30 23:58:15,154 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:15,154 INFO L375 BasicCegarLoop]: trace histogram [124, 124, 124, 124, 1, 1, 1, 1, 1, 1] [2018-09-30 23:58:15,155 INFO L423 AbstractCegarLoop]: === Iteration 126 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:15,155 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:15,155 INFO L82 PathProgramCache]: Analyzing trace with hash 138253540, now seen corresponding path program 124 times [2018-09-30 23:58:15,155 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:15,155 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:15,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:15,155 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:15,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:15,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:21,320 INFO L134 CoverageAnalysis]: Checked inductivity of 30628 backedges. 0 proven. 30628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:21,320 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:21,321 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:21,327 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:58:21,432 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:58:21,433 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:21,438 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:21,619 INFO L134 CoverageAnalysis]: Checked inductivity of 30628 backedges. 0 proven. 30628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:21,640 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:21,641 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [126, 126] total 126 [2018-09-30 23:58:21,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 127 states [2018-09-30 23:58:21,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2018-09-30 23:58:21,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8001, Invalid=8001, Unknown=0, NotChecked=0, Total=16002 [2018-09-30 23:58:21,642 INFO L87 Difference]: Start difference. First operand 503 states and 503 transitions. Second operand 127 states. [2018-09-30 23:58:22,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:22,581 INFO L93 Difference]: Finished difference Result 509 states and 509 transitions. [2018-09-30 23:58:22,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2018-09-30 23:58:22,582 INFO L78 Accepts]: Start accepts. Automaton has 127 states. Word has length 502 [2018-09-30 23:58:22,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:22,583 INFO L225 Difference]: With dead ends: 509 [2018-09-30 23:58:22,583 INFO L226 Difference]: Without dead ends: 507 [2018-09-30 23:58:22,584 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 627 GetRequests, 502 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=8001, Invalid=8001, Unknown=0, NotChecked=0, Total=16002 [2018-09-30 23:58:22,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2018-09-30 23:58:22,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 507. [2018-09-30 23:58:22,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 507 states. [2018-09-30 23:58:22,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 507 transitions. [2018-09-30 23:58:22,588 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 507 transitions. Word has length 502 [2018-09-30 23:58:22,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:22,589 INFO L480 AbstractCegarLoop]: Abstraction has 507 states and 507 transitions. [2018-09-30 23:58:22,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has 127 states. [2018-09-30 23:58:22,589 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 507 transitions. [2018-09-30 23:58:22,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2018-09-30 23:58:22,591 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:22,591 INFO L375 BasicCegarLoop]: trace histogram [125, 125, 125, 125, 1, 1, 1, 1, 1, 1] [2018-09-30 23:58:22,592 INFO L423 AbstractCegarLoop]: === Iteration 127 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:22,592 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:22,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1238249330, now seen corresponding path program 125 times [2018-09-30 23:58:22,592 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:22,592 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:22,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:22,593 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:22,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:22,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:28,620 INFO L134 CoverageAnalysis]: Checked inductivity of 31125 backedges. 0 proven. 31125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:28,620 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:28,621 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:28,628 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:58:28,889 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 126 check-sat command(s) [2018-09-30 23:58:28,890 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:28,895 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:29,059 INFO L134 CoverageAnalysis]: Checked inductivity of 31125 backedges. 0 proven. 31125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:29,079 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:29,079 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [127, 127] total 127 [2018-09-30 23:58:29,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-09-30 23:58:29,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-09-30 23:58:29,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8128, Invalid=8128, Unknown=0, NotChecked=0, Total=16256 [2018-09-30 23:58:29,081 INFO L87 Difference]: Start difference. First operand 507 states and 507 transitions. Second operand 128 states. [2018-09-30 23:58:29,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:29,931 INFO L93 Difference]: Finished difference Result 513 states and 513 transitions. [2018-09-30 23:58:29,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-09-30 23:58:29,932 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 506 [2018-09-30 23:58:29,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:29,933 INFO L225 Difference]: With dead ends: 513 [2018-09-30 23:58:29,933 INFO L226 Difference]: Without dead ends: 511 [2018-09-30 23:58:29,935 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 632 GetRequests, 506 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=8128, Invalid=8128, Unknown=0, NotChecked=0, Total=16256 [2018-09-30 23:58:29,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2018-09-30 23:58:29,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 511. [2018-09-30 23:58:29,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2018-09-30 23:58:29,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 511 transitions. [2018-09-30 23:58:29,939 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 511 transitions. Word has length 506 [2018-09-30 23:58:29,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:29,940 INFO L480 AbstractCegarLoop]: Abstraction has 511 states and 511 transitions. [2018-09-30 23:58:29,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-09-30 23:58:29,940 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 511 transitions. [2018-09-30 23:58:29,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 511 [2018-09-30 23:58:29,942 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:29,942 INFO L375 BasicCegarLoop]: trace histogram [126, 126, 126, 126, 1, 1, 1, 1, 1, 1] [2018-09-30 23:58:29,943 INFO L423 AbstractCegarLoop]: === Iteration 128 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:29,943 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:29,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1830017224, now seen corresponding path program 126 times [2018-09-30 23:58:29,943 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:29,944 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:29,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:29,944 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:29,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:30,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:36,389 INFO L134 CoverageAnalysis]: Checked inductivity of 31626 backedges. 0 proven. 31626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:36,389 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:36,390 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:36,398 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:58:36,662 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 127 check-sat command(s) [2018-09-30 23:58:36,662 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:36,669 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:36,826 INFO L134 CoverageAnalysis]: Checked inductivity of 31626 backedges. 0 proven. 31626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:36,847 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:36,847 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [128, 128] total 128 [2018-09-30 23:58:36,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 129 states [2018-09-30 23:58:36,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2018-09-30 23:58:36,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8256, Invalid=8256, Unknown=0, NotChecked=0, Total=16512 [2018-09-30 23:58:36,849 INFO L87 Difference]: Start difference. First operand 511 states and 511 transitions. Second operand 129 states. [2018-09-30 23:58:37,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:37,437 INFO L93 Difference]: Finished difference Result 517 states and 517 transitions. [2018-09-30 23:58:37,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2018-09-30 23:58:37,437 INFO L78 Accepts]: Start accepts. Automaton has 129 states. Word has length 510 [2018-09-30 23:58:37,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:37,439 INFO L225 Difference]: With dead ends: 517 [2018-09-30 23:58:37,439 INFO L226 Difference]: Without dead ends: 515 [2018-09-30 23:58:37,440 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 637 GetRequests, 510 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=8256, Invalid=8256, Unknown=0, NotChecked=0, Total=16512 [2018-09-30 23:58:37,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2018-09-30 23:58:37,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 515. [2018-09-30 23:58:37,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 515 states. [2018-09-30 23:58:37,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 515 transitions. [2018-09-30 23:58:37,444 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 515 transitions. Word has length 510 [2018-09-30 23:58:37,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:37,444 INFO L480 AbstractCegarLoop]: Abstraction has 515 states and 515 transitions. [2018-09-30 23:58:37,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has 129 states. [2018-09-30 23:58:37,445 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 515 transitions. [2018-09-30 23:58:37,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 515 [2018-09-30 23:58:37,447 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:37,447 INFO L375 BasicCegarLoop]: trace histogram [127, 127, 127, 127, 1, 1, 1, 1, 1, 1] [2018-09-30 23:58:37,447 INFO L423 AbstractCegarLoop]: === Iteration 129 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:37,447 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:37,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1206327522, now seen corresponding path program 127 times [2018-09-30 23:58:37,447 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:37,447 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:37,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:37,448 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:37,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:37,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:43,739 INFO L134 CoverageAnalysis]: Checked inductivity of 32131 backedges. 0 proven. 32131 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:43,739 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:43,739 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:43,748 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:58:43,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:43,860 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:44,029 INFO L134 CoverageAnalysis]: Checked inductivity of 32131 backedges. 0 proven. 32131 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:44,049 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:44,050 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [129, 129] total 129 [2018-09-30 23:58:44,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-09-30 23:58:44,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-09-30 23:58:44,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8385, Invalid=8385, Unknown=0, NotChecked=0, Total=16770 [2018-09-30 23:58:44,052 INFO L87 Difference]: Start difference. First operand 515 states and 515 transitions. Second operand 130 states. [2018-09-30 23:58:44,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:44,863 INFO L93 Difference]: Finished difference Result 521 states and 521 transitions. [2018-09-30 23:58:44,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2018-09-30 23:58:44,864 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 514 [2018-09-30 23:58:44,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:44,865 INFO L225 Difference]: With dead ends: 521 [2018-09-30 23:58:44,865 INFO L226 Difference]: Without dead ends: 519 [2018-09-30 23:58:44,867 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 642 GetRequests, 514 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=8385, Invalid=8385, Unknown=0, NotChecked=0, Total=16770 [2018-09-30 23:58:44,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2018-09-30 23:58:44,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 519. [2018-09-30 23:58:44,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 519 states. [2018-09-30 23:58:44,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 519 transitions. [2018-09-30 23:58:44,870 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 519 transitions. Word has length 514 [2018-09-30 23:58:44,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:44,871 INFO L480 AbstractCegarLoop]: Abstraction has 519 states and 519 transitions. [2018-09-30 23:58:44,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-09-30 23:58:44,871 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 519 transitions. [2018-09-30 23:58:44,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 519 [2018-09-30 23:58:44,873 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:44,874 INFO L375 BasicCegarLoop]: trace histogram [128, 128, 128, 128, 1, 1, 1, 1, 1, 1] [2018-09-30 23:58:44,874 INFO L423 AbstractCegarLoop]: === Iteration 130 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:44,874 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:44,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1029514636, now seen corresponding path program 128 times [2018-09-30 23:58:44,874 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:44,875 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:44,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:44,875 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:58:44,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:44,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:51,230 INFO L134 CoverageAnalysis]: Checked inductivity of 32640 backedges. 0 proven. 32640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:51,230 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:51,230 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:51,255 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:58:51,350 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:58:51,350 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:51,355 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:51,542 INFO L134 CoverageAnalysis]: Checked inductivity of 32640 backedges. 0 proven. 32640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:51,563 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:51,563 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [130, 130] total 130 [2018-09-30 23:58:51,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 131 states [2018-09-30 23:58:51,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2018-09-30 23:58:51,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8515, Invalid=8515, Unknown=0, NotChecked=0, Total=17030 [2018-09-30 23:58:51,565 INFO L87 Difference]: Start difference. First operand 519 states and 519 transitions. Second operand 131 states. [2018-09-30 23:58:52,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:52,388 INFO L93 Difference]: Finished difference Result 525 states and 525 transitions. [2018-09-30 23:58:52,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2018-09-30 23:58:52,388 INFO L78 Accepts]: Start accepts. Automaton has 131 states. Word has length 518 [2018-09-30 23:58:52,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:52,390 INFO L225 Difference]: With dead ends: 525 [2018-09-30 23:58:52,390 INFO L226 Difference]: Without dead ends: 523 [2018-09-30 23:58:52,391 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 647 GetRequests, 518 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=8515, Invalid=8515, Unknown=0, NotChecked=0, Total=17030 [2018-09-30 23:58:52,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2018-09-30 23:58:52,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 523. [2018-09-30 23:58:52,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 523 states. [2018-09-30 23:58:52,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 523 transitions. [2018-09-30 23:58:52,395 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 523 transitions. Word has length 518 [2018-09-30 23:58:52,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:52,395 INFO L480 AbstractCegarLoop]: Abstraction has 523 states and 523 transitions. [2018-09-30 23:58:52,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has 131 states. [2018-09-30 23:58:52,395 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 523 transitions. [2018-09-30 23:58:52,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2018-09-30 23:58:52,397 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:52,397 INFO L375 BasicCegarLoop]: trace histogram [129, 129, 129, 129, 1, 1, 1, 1, 1, 1] [2018-09-30 23:58:52,397 INFO L423 AbstractCegarLoop]: === Iteration 131 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:52,398 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:52,398 INFO L82 PathProgramCache]: Analyzing trace with hash 977849654, now seen corresponding path program 129 times [2018-09-30 23:58:52,398 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:52,398 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:52,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:52,398 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:52,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:52,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:58,883 INFO L134 CoverageAnalysis]: Checked inductivity of 33153 backedges. 0 proven. 33153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:58,883 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:58,883 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:58,890 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:58:59,175 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 130 check-sat command(s) [2018-09-30 23:58:59,176 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:59,181 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:59,394 INFO L134 CoverageAnalysis]: Checked inductivity of 33153 backedges. 0 proven. 33153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:59,414 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:59,415 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [131, 131] total 131 [2018-09-30 23:58:59,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-09-30 23:58:59,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-09-30 23:58:59,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8646, Invalid=8646, Unknown=0, NotChecked=0, Total=17292 [2018-09-30 23:58:59,417 INFO L87 Difference]: Start difference. First operand 523 states and 523 transitions. Second operand 132 states. [2018-09-30 23:59:00,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:00,201 INFO L93 Difference]: Finished difference Result 529 states and 529 transitions. [2018-09-30 23:59:00,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2018-09-30 23:59:00,201 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 522 [2018-09-30 23:59:00,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:00,202 INFO L225 Difference]: With dead ends: 529 [2018-09-30 23:59:00,202 INFO L226 Difference]: Without dead ends: 527 [2018-09-30 23:59:00,203 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 652 GetRequests, 522 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=8646, Invalid=8646, Unknown=0, NotChecked=0, Total=17292 [2018-09-30 23:59:00,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2018-09-30 23:59:00,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 527. [2018-09-30 23:59:00,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 527 states. [2018-09-30 23:59:00,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 527 transitions. [2018-09-30 23:59:00,207 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 527 transitions. Word has length 522 [2018-09-30 23:59:00,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:00,207 INFO L480 AbstractCegarLoop]: Abstraction has 527 states and 527 transitions. [2018-09-30 23:59:00,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-09-30 23:59:00,208 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 527 transitions. [2018-09-30 23:59:00,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 527 [2018-09-30 23:59:00,210 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:00,210 INFO L375 BasicCegarLoop]: trace histogram [130, 130, 130, 130, 1, 1, 1, 1, 1, 1] [2018-09-30 23:59:00,211 INFO L423 AbstractCegarLoop]: === Iteration 132 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:00,211 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:00,211 INFO L82 PathProgramCache]: Analyzing trace with hash 73699296, now seen corresponding path program 130 times [2018-09-30 23:59:00,211 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:00,211 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:00,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:00,212 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:00,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:00,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:07,480 INFO L134 CoverageAnalysis]: Checked inductivity of 33670 backedges. 0 proven. 33670 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:07,480 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:07,480 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:07,487 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:59:07,595 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:59:07,595 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:07,601 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:07,794 INFO L134 CoverageAnalysis]: Checked inductivity of 33670 backedges. 0 proven. 33670 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:07,815 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:07,815 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [132, 132] total 132 [2018-09-30 23:59:07,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 133 states [2018-09-30 23:59:07,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2018-09-30 23:59:07,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8778, Invalid=8778, Unknown=0, NotChecked=0, Total=17556 [2018-09-30 23:59:07,817 INFO L87 Difference]: Start difference. First operand 527 states and 527 transitions. Second operand 133 states. [2018-09-30 23:59:08,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:08,714 INFO L93 Difference]: Finished difference Result 533 states and 533 transitions. [2018-09-30 23:59:08,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2018-09-30 23:59:08,714 INFO L78 Accepts]: Start accepts. Automaton has 133 states. Word has length 526 [2018-09-30 23:59:08,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:08,715 INFO L225 Difference]: With dead ends: 533 [2018-09-30 23:59:08,716 INFO L226 Difference]: Without dead ends: 531 [2018-09-30 23:59:08,716 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 657 GetRequests, 526 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=8778, Invalid=8778, Unknown=0, NotChecked=0, Total=17556 [2018-09-30 23:59:08,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2018-09-30 23:59:08,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 531. [2018-09-30 23:59:08,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 531 states. [2018-09-30 23:59:08,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 531 transitions. [2018-09-30 23:59:08,719 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 531 transitions. Word has length 526 [2018-09-30 23:59:08,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:08,720 INFO L480 AbstractCegarLoop]: Abstraction has 531 states and 531 transitions. [2018-09-30 23:59:08,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has 133 states. [2018-09-30 23:59:08,720 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 531 transitions. [2018-09-30 23:59:08,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2018-09-30 23:59:08,722 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:08,722 INFO L375 BasicCegarLoop]: trace histogram [131, 131, 131, 131, 1, 1, 1, 1, 1, 1] [2018-09-30 23:59:08,722 INFO L423 AbstractCegarLoop]: === Iteration 133 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:08,722 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:08,722 INFO L82 PathProgramCache]: Analyzing trace with hash 2813322, now seen corresponding path program 131 times [2018-09-30 23:59:08,722 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:08,722 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:08,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:08,723 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:08,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:08,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:15,357 INFO L134 CoverageAnalysis]: Checked inductivity of 34191 backedges. 0 proven. 34191 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:15,357 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:15,357 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:15,364 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:59:15,661 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 132 check-sat command(s) [2018-09-30 23:59:15,661 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:15,668 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:15,865 INFO L134 CoverageAnalysis]: Checked inductivity of 34191 backedges. 0 proven. 34191 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:15,885 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:15,885 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [133, 133] total 133 [2018-09-30 23:59:15,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-09-30 23:59:15,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-09-30 23:59:15,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8911, Invalid=8911, Unknown=0, NotChecked=0, Total=17822 [2018-09-30 23:59:15,887 INFO L87 Difference]: Start difference. First operand 531 states and 531 transitions. Second operand 134 states. [2018-09-30 23:59:17,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:17,017 INFO L93 Difference]: Finished difference Result 537 states and 537 transitions. [2018-09-30 23:59:17,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2018-09-30 23:59:17,017 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 530 [2018-09-30 23:59:17,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:17,018 INFO L225 Difference]: With dead ends: 537 [2018-09-30 23:59:17,019 INFO L226 Difference]: Without dead ends: 535 [2018-09-30 23:59:17,019 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 662 GetRequests, 530 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=8911, Invalid=8911, Unknown=0, NotChecked=0, Total=17822 [2018-09-30 23:59:17,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2018-09-30 23:59:17,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 535. [2018-09-30 23:59:17,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 535 states. [2018-09-30 23:59:17,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 535 transitions. [2018-09-30 23:59:17,023 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 535 transitions. Word has length 530 [2018-09-30 23:59:17,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:17,024 INFO L480 AbstractCegarLoop]: Abstraction has 535 states and 535 transitions. [2018-09-30 23:59:17,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-09-30 23:59:17,024 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 535 transitions. [2018-09-30 23:59:17,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 535 [2018-09-30 23:59:17,027 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:17,027 INFO L375 BasicCegarLoop]: trace histogram [132, 132, 132, 132, 1, 1, 1, 1, 1, 1] [2018-09-30 23:59:17,027 INFO L423 AbstractCegarLoop]: === Iteration 134 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:17,027 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:17,027 INFO L82 PathProgramCache]: Analyzing trace with hash -791255500, now seen corresponding path program 132 times [2018-09-30 23:59:17,028 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:17,028 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:17,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:17,028 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:17,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:17,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:23,789 INFO L134 CoverageAnalysis]: Checked inductivity of 34716 backedges. 0 proven. 34716 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:23,789 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:23,789 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:23,796 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:59:24,082 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 133 check-sat command(s) [2018-09-30 23:59:24,082 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:24,088 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:24,288 INFO L134 CoverageAnalysis]: Checked inductivity of 34716 backedges. 0 proven. 34716 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:24,309 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:24,309 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [134, 134] total 134 [2018-09-30 23:59:24,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 135 states [2018-09-30 23:59:24,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2018-09-30 23:59:24,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9045, Invalid=9045, Unknown=0, NotChecked=0, Total=18090 [2018-09-30 23:59:24,311 INFO L87 Difference]: Start difference. First operand 535 states and 535 transitions. Second operand 135 states. [2018-09-30 23:59:25,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:25,509 INFO L93 Difference]: Finished difference Result 541 states and 541 transitions. [2018-09-30 23:59:25,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2018-09-30 23:59:25,509 INFO L78 Accepts]: Start accepts. Automaton has 135 states. Word has length 534 [2018-09-30 23:59:25,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:25,511 INFO L225 Difference]: With dead ends: 541 [2018-09-30 23:59:25,511 INFO L226 Difference]: Without dead ends: 539 [2018-09-30 23:59:25,512 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 667 GetRequests, 534 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=9045, Invalid=9045, Unknown=0, NotChecked=0, Total=18090 [2018-09-30 23:59:25,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2018-09-30 23:59:25,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 539. [2018-09-30 23:59:25,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 539 states. [2018-09-30 23:59:25,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 539 transitions. [2018-09-30 23:59:25,515 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 539 transitions. Word has length 534 [2018-09-30 23:59:25,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:25,515 INFO L480 AbstractCegarLoop]: Abstraction has 539 states and 539 transitions. [2018-09-30 23:59:25,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has 135 states. [2018-09-30 23:59:25,515 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 539 transitions. [2018-09-30 23:59:25,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 539 [2018-09-30 23:59:25,517 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:25,517 INFO L375 BasicCegarLoop]: trace histogram [133, 133, 133, 133, 1, 1, 1, 1, 1, 1] [2018-09-30 23:59:25,517 INFO L423 AbstractCegarLoop]: === Iteration 135 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:25,517 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:25,517 INFO L82 PathProgramCache]: Analyzing trace with hash -127829538, now seen corresponding path program 133 times [2018-09-30 23:59:25,518 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:25,518 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:25,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:25,518 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:25,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:25,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:32,620 INFO L134 CoverageAnalysis]: Checked inductivity of 35245 backedges. 0 proven. 35245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:32,620 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:32,620 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:32,628 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:59:32,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:32,736 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:32,952 INFO L134 CoverageAnalysis]: Checked inductivity of 35245 backedges. 0 proven. 35245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:32,973 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:32,974 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [135, 135] total 135 [2018-09-30 23:59:32,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-09-30 23:59:32,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-09-30 23:59:32,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9180, Invalid=9180, Unknown=0, NotChecked=0, Total=18360 [2018-09-30 23:59:32,975 INFO L87 Difference]: Start difference. First operand 539 states and 539 transitions. Second operand 136 states. [2018-09-30 23:59:34,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:34,183 INFO L93 Difference]: Finished difference Result 545 states and 545 transitions. [2018-09-30 23:59:34,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2018-09-30 23:59:34,183 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 538 [2018-09-30 23:59:34,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:34,184 INFO L225 Difference]: With dead ends: 545 [2018-09-30 23:59:34,184 INFO L226 Difference]: Without dead ends: 543 [2018-09-30 23:59:34,185 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 672 GetRequests, 538 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=9180, Invalid=9180, Unknown=0, NotChecked=0, Total=18360 [2018-09-30 23:59:34,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2018-09-30 23:59:34,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 543. [2018-09-30 23:59:34,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 543 states. [2018-09-30 23:59:34,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 543 transitions. [2018-09-30 23:59:34,188 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 543 transitions. Word has length 538 [2018-09-30 23:59:34,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:34,188 INFO L480 AbstractCegarLoop]: Abstraction has 543 states and 543 transitions. [2018-09-30 23:59:34,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-09-30 23:59:34,188 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 543 transitions. [2018-09-30 23:59:34,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 543 [2018-09-30 23:59:34,190 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:34,190 INFO L375 BasicCegarLoop]: trace histogram [134, 134, 134, 134, 1, 1, 1, 1, 1, 1] [2018-09-30 23:59:34,191 INFO L423 AbstractCegarLoop]: === Iteration 136 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:34,191 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:34,191 INFO L82 PathProgramCache]: Analyzing trace with hash 2005313672, now seen corresponding path program 134 times [2018-09-30 23:59:34,191 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:34,191 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:34,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:34,191 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:59:34,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:34,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:41,139 INFO L134 CoverageAnalysis]: Checked inductivity of 35778 backedges. 0 proven. 35778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:41,140 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:41,140 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:41,147 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:59:41,250 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:59:41,250 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:41,256 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:41,478 INFO L134 CoverageAnalysis]: Checked inductivity of 35778 backedges. 0 proven. 35778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:41,498 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:41,498 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [136, 136] total 136 [2018-09-30 23:59:41,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 137 states [2018-09-30 23:59:41,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2018-09-30 23:59:41,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9316, Invalid=9316, Unknown=0, NotChecked=0, Total=18632 [2018-09-30 23:59:41,500 INFO L87 Difference]: Start difference. First operand 543 states and 543 transitions. Second operand 137 states. [2018-09-30 23:59:42,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:42,748 INFO L93 Difference]: Finished difference Result 549 states and 549 transitions. [2018-09-30 23:59:42,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2018-09-30 23:59:42,748 INFO L78 Accepts]: Start accepts. Automaton has 137 states. Word has length 542 [2018-09-30 23:59:42,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:42,749 INFO L225 Difference]: With dead ends: 549 [2018-09-30 23:59:42,749 INFO L226 Difference]: Without dead ends: 547 [2018-09-30 23:59:42,750 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 677 GetRequests, 542 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=9316, Invalid=9316, Unknown=0, NotChecked=0, Total=18632 [2018-09-30 23:59:42,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2018-09-30 23:59:42,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 547. [2018-09-30 23:59:42,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 547 states. [2018-09-30 23:59:42,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 547 transitions. [2018-09-30 23:59:42,755 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 547 transitions. Word has length 542 [2018-09-30 23:59:42,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:42,755 INFO L480 AbstractCegarLoop]: Abstraction has 547 states and 547 transitions. [2018-09-30 23:59:42,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has 137 states. [2018-09-30 23:59:42,756 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 547 transitions. [2018-09-30 23:59:42,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 547 [2018-09-30 23:59:42,760 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:42,760 INFO L375 BasicCegarLoop]: trace histogram [135, 135, 135, 135, 1, 1, 1, 1, 1, 1] [2018-09-30 23:59:42,760 INFO L423 AbstractCegarLoop]: === Iteration 137 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:42,761 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:42,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1841328690, now seen corresponding path program 135 times [2018-09-30 23:59:42,761 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:42,761 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:42,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:42,762 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:42,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:42,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:49,827 INFO L134 CoverageAnalysis]: Checked inductivity of 36315 backedges. 0 proven. 36315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:49,827 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:49,827 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:49,834 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:59:50,130 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 136 check-sat command(s) [2018-09-30 23:59:50,130 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:50,137 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:50,345 INFO L134 CoverageAnalysis]: Checked inductivity of 36315 backedges. 0 proven. 36315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:50,366 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:50,367 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [137, 137] total 137 [2018-09-30 23:59:50,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-09-30 23:59:50,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-09-30 23:59:50,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9453, Invalid=9453, Unknown=0, NotChecked=0, Total=18906 [2018-09-30 23:59:50,368 INFO L87 Difference]: Start difference. First operand 547 states and 547 transitions. Second operand 138 states. [2018-09-30 23:59:51,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:51,420 INFO L93 Difference]: Finished difference Result 553 states and 553 transitions. [2018-09-30 23:59:51,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2018-09-30 23:59:51,421 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 546 [2018-09-30 23:59:51,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:51,422 INFO L225 Difference]: With dead ends: 553 [2018-09-30 23:59:51,422 INFO L226 Difference]: Without dead ends: 551 [2018-09-30 23:59:51,422 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 682 GetRequests, 546 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=9453, Invalid=9453, Unknown=0, NotChecked=0, Total=18906 [2018-09-30 23:59:51,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2018-09-30 23:59:51,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 551. [2018-09-30 23:59:51,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 551 states. [2018-09-30 23:59:51,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 551 transitions. [2018-09-30 23:59:51,426 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 551 transitions. Word has length 546 [2018-09-30 23:59:51,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:51,426 INFO L480 AbstractCegarLoop]: Abstraction has 551 states and 551 transitions. [2018-09-30 23:59:51,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-09-30 23:59:51,426 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 551 transitions. [2018-09-30 23:59:51,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 551 [2018-09-30 23:59:51,428 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:51,428 INFO L375 BasicCegarLoop]: trace histogram [136, 136, 136, 136, 1, 1, 1, 1, 1, 1] [2018-09-30 23:59:51,428 INFO L423 AbstractCegarLoop]: === Iteration 138 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:51,429 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:51,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1186375972, now seen corresponding path program 136 times [2018-09-30 23:59:51,429 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:51,429 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:51,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:51,429 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:51,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:51,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:58,786 INFO L134 CoverageAnalysis]: Checked inductivity of 36856 backedges. 0 proven. 36856 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:58,787 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:58,787 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:58,794 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:59:58,912 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:59:58,912 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:58,918 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:59,130 INFO L134 CoverageAnalysis]: Checked inductivity of 36856 backedges. 0 proven. 36856 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:59,151 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:59,151 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [138, 138] total 138 [2018-09-30 23:59:59,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 139 states [2018-09-30 23:59:59,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2018-09-30 23:59:59,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9591, Invalid=9591, Unknown=0, NotChecked=0, Total=19182 [2018-09-30 23:59:59,153 INFO L87 Difference]: Start difference. First operand 551 states and 551 transitions. Second operand 139 states. [2018-10-01 00:00:00,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:00,197 INFO L93 Difference]: Finished difference Result 557 states and 557 transitions. [2018-10-01 00:00:00,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2018-10-01 00:00:00,198 INFO L78 Accepts]: Start accepts. Automaton has 139 states. Word has length 550 [2018-10-01 00:00:00,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:00,199 INFO L225 Difference]: With dead ends: 557 [2018-10-01 00:00:00,199 INFO L226 Difference]: Without dead ends: 555 [2018-10-01 00:00:00,200 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 687 GetRequests, 550 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=9591, Invalid=9591, Unknown=0, NotChecked=0, Total=19182 [2018-10-01 00:00:00,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2018-10-01 00:00:00,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 555. [2018-10-01 00:00:00,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 555 states. [2018-10-01 00:00:00,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 555 transitions. [2018-10-01 00:00:00,204 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 555 transitions. Word has length 550 [2018-10-01 00:00:00,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:00,204 INFO L480 AbstractCegarLoop]: Abstraction has 555 states and 555 transitions. [2018-10-01 00:00:00,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has 139 states. [2018-10-01 00:00:00,204 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 555 transitions. [2018-10-01 00:00:00,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 555 [2018-10-01 00:00:00,206 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:00,206 INFO L375 BasicCegarLoop]: trace histogram [137, 137, 137, 137, 1, 1, 1, 1, 1, 1] [2018-10-01 00:00:00,206 INFO L423 AbstractCegarLoop]: === Iteration 139 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:00,207 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:00,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1759783290, now seen corresponding path program 137 times [2018-10-01 00:00:00,207 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:00,207 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:00,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:00,208 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:00,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:00,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:07,464 INFO L134 CoverageAnalysis]: Checked inductivity of 37401 backedges. 0 proven. 37401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:07,465 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:07,465 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:07,473 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:00:07,787 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 138 check-sat command(s) [2018-10-01 00:00:07,787 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:07,794 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:08,022 INFO L134 CoverageAnalysis]: Checked inductivity of 37401 backedges. 0 proven. 37401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:08,043 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:08,043 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [139, 139] total 139 [2018-10-01 00:00:08,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 140 states [2018-10-01 00:00:08,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2018-10-01 00:00:08,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9730, Invalid=9730, Unknown=0, NotChecked=0, Total=19460 [2018-10-01 00:00:08,045 INFO L87 Difference]: Start difference. First operand 555 states and 555 transitions. Second operand 140 states. [2018-10-01 00:00:08,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:08,942 INFO L93 Difference]: Finished difference Result 561 states and 561 transitions. [2018-10-01 00:00:08,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2018-10-01 00:00:08,942 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 554 [2018-10-01 00:00:08,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:08,944 INFO L225 Difference]: With dead ends: 561 [2018-10-01 00:00:08,944 INFO L226 Difference]: Without dead ends: 559 [2018-10-01 00:00:08,945 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 692 GetRequests, 554 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=9730, Invalid=9730, Unknown=0, NotChecked=0, Total=19460 [2018-10-01 00:00:08,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2018-10-01 00:00:08,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 559. [2018-10-01 00:00:08,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 559 states. [2018-10-01 00:00:08,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 559 transitions. [2018-10-01 00:00:08,948 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 559 transitions. Word has length 554 [2018-10-01 00:00:08,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:08,948 INFO L480 AbstractCegarLoop]: Abstraction has 559 states and 559 transitions. [2018-10-01 00:00:08,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has 140 states. [2018-10-01 00:00:08,949 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 559 transitions. [2018-10-01 00:00:08,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 559 [2018-10-01 00:00:08,950 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:08,951 INFO L375 BasicCegarLoop]: trace histogram [138, 138, 138, 138, 1, 1, 1, 1, 1, 1] [2018-10-01 00:00:08,951 INFO L423 AbstractCegarLoop]: === Iteration 140 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:08,951 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:08,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1123184944, now seen corresponding path program 138 times [2018-10-01 00:00:08,951 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:08,951 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:08,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:08,952 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:08,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:09,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:16,284 INFO L134 CoverageAnalysis]: Checked inductivity of 37950 backedges. 0 proven. 37950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:16,284 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:16,284 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:16,292 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:00:16,595 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 139 check-sat command(s) [2018-10-01 00:00:16,596 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:16,601 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:16,819 INFO L134 CoverageAnalysis]: Checked inductivity of 37950 backedges. 0 proven. 37950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:16,839 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:16,840 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [140, 140] total 140 [2018-10-01 00:00:16,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 141 states [2018-10-01 00:00:16,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2018-10-01 00:00:16,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9870, Invalid=9870, Unknown=0, NotChecked=0, Total=19740 [2018-10-01 00:00:16,842 INFO L87 Difference]: Start difference. First operand 559 states and 559 transitions. Second operand 141 states. [2018-10-01 00:00:18,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:18,006 INFO L93 Difference]: Finished difference Result 565 states and 565 transitions. [2018-10-01 00:00:18,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2018-10-01 00:00:18,007 INFO L78 Accepts]: Start accepts. Automaton has 141 states. Word has length 558 [2018-10-01 00:00:18,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:18,008 INFO L225 Difference]: With dead ends: 565 [2018-10-01 00:00:18,008 INFO L226 Difference]: Without dead ends: 563 [2018-10-01 00:00:18,009 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 697 GetRequests, 558 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=9870, Invalid=9870, Unknown=0, NotChecked=0, Total=19740 [2018-10-01 00:00:18,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2018-10-01 00:00:18,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 563. [2018-10-01 00:00:18,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 563 states. [2018-10-01 00:00:18,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 563 transitions. [2018-10-01 00:00:18,013 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 563 transitions. Word has length 558 [2018-10-01 00:00:18,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:18,013 INFO L480 AbstractCegarLoop]: Abstraction has 563 states and 563 transitions. [2018-10-01 00:00:18,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has 141 states. [2018-10-01 00:00:18,013 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 563 transitions. [2018-10-01 00:00:18,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 563 [2018-10-01 00:00:18,015 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:18,015 INFO L375 BasicCegarLoop]: trace histogram [139, 139, 139, 139, 1, 1, 1, 1, 1, 1] [2018-10-01 00:00:18,015 INFO L423 AbstractCegarLoop]: === Iteration 141 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:18,016 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:18,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1756911910, now seen corresponding path program 139 times [2018-10-01 00:00:18,016 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:18,016 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:18,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:18,017 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:18,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:18,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:25,662 INFO L134 CoverageAnalysis]: Checked inductivity of 38503 backedges. 0 proven. 38503 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:25,663 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:25,663 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:25,682 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:00:25,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:25,795 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:26,008 INFO L134 CoverageAnalysis]: Checked inductivity of 38503 backedges. 0 proven. 38503 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:26,028 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:26,029 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [141, 141] total 141 [2018-10-01 00:00:26,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-10-01 00:00:26,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-10-01 00:00:26,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10011, Invalid=10011, Unknown=0, NotChecked=0, Total=20022 [2018-10-01 00:00:26,031 INFO L87 Difference]: Start difference. First operand 563 states and 563 transitions. Second operand 142 states. [2018-10-01 00:00:26,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:26,644 INFO L93 Difference]: Finished difference Result 569 states and 569 transitions. [2018-10-01 00:00:26,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2018-10-01 00:00:26,644 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 562 [2018-10-01 00:00:26,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:26,645 INFO L225 Difference]: With dead ends: 569 [2018-10-01 00:00:26,646 INFO L226 Difference]: Without dead ends: 567 [2018-10-01 00:00:26,647 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 702 GetRequests, 562 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=10011, Invalid=10011, Unknown=0, NotChecked=0, Total=20022 [2018-10-01 00:00:26,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2018-10-01 00:00:26,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 567. [2018-10-01 00:00:26,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 567 states. [2018-10-01 00:00:26,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 567 transitions. [2018-10-01 00:00:26,650 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 567 transitions. Word has length 562 [2018-10-01 00:00:26,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:26,651 INFO L480 AbstractCegarLoop]: Abstraction has 567 states and 567 transitions. [2018-10-01 00:00:26,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-10-01 00:00:26,651 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 567 transitions. [2018-10-01 00:00:26,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 567 [2018-10-01 00:00:26,653 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:26,653 INFO L375 BasicCegarLoop]: trace histogram [140, 140, 140, 140, 1, 1, 1, 1, 1, 1] [2018-10-01 00:00:26,653 INFO L423 AbstractCegarLoop]: === Iteration 142 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:26,653 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:26,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1386875004, now seen corresponding path program 140 times [2018-10-01 00:00:26,654 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:26,654 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:26,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:26,654 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:00:26,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:26,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:34,542 INFO L134 CoverageAnalysis]: Checked inductivity of 39060 backedges. 0 proven. 39060 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:34,542 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:34,542 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:34,549 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:00:34,658 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:00:34,658 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:34,664 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:34,905 INFO L134 CoverageAnalysis]: Checked inductivity of 39060 backedges. 0 proven. 39060 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:34,925 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:34,925 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [142, 142] total 142 [2018-10-01 00:00:34,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 143 states [2018-10-01 00:00:34,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2018-10-01 00:00:34,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10153, Invalid=10153, Unknown=0, NotChecked=0, Total=20306 [2018-10-01 00:00:34,927 INFO L87 Difference]: Start difference. First operand 567 states and 567 transitions. Second operand 143 states. [2018-10-01 00:00:36,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:36,178 INFO L93 Difference]: Finished difference Result 573 states and 573 transitions. [2018-10-01 00:00:36,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2018-10-01 00:00:36,179 INFO L78 Accepts]: Start accepts. Automaton has 143 states. Word has length 566 [2018-10-01 00:00:36,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:36,180 INFO L225 Difference]: With dead ends: 573 [2018-10-01 00:00:36,180 INFO L226 Difference]: Without dead ends: 571 [2018-10-01 00:00:36,181 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 707 GetRequests, 566 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=10153, Invalid=10153, Unknown=0, NotChecked=0, Total=20306 [2018-10-01 00:00:36,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2018-10-01 00:00:36,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 571. [2018-10-01 00:00:36,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 571 states. [2018-10-01 00:00:36,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 571 transitions. [2018-10-01 00:00:36,185 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 571 transitions. Word has length 566 [2018-10-01 00:00:36,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:36,185 INFO L480 AbstractCegarLoop]: Abstraction has 571 states and 571 transitions. [2018-10-01 00:00:36,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has 143 states. [2018-10-01 00:00:36,185 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 571 transitions. [2018-10-01 00:00:36,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 571 [2018-10-01 00:00:36,187 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:36,187 INFO L375 BasicCegarLoop]: trace histogram [141, 141, 141, 141, 1, 1, 1, 1, 1, 1] [2018-10-01 00:00:36,187 INFO L423 AbstractCegarLoop]: === Iteration 143 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:36,188 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:36,188 INFO L82 PathProgramCache]: Analyzing trace with hash 2098717486, now seen corresponding path program 141 times [2018-10-01 00:00:36,188 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:36,188 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:36,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:36,188 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:36,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:36,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:43,741 INFO L134 CoverageAnalysis]: Checked inductivity of 39621 backedges. 0 proven. 39621 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:43,742 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:43,742 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:43,749 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:00:44,108 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 142 check-sat command(s) [2018-10-01 00:00:44,108 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:44,114 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:44,362 INFO L134 CoverageAnalysis]: Checked inductivity of 39621 backedges. 0 proven. 39621 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:44,383 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:44,384 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [143, 143] total 143 [2018-10-01 00:00:44,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-10-01 00:00:44,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-10-01 00:00:44,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10296, Invalid=10296, Unknown=0, NotChecked=0, Total=20592 [2018-10-01 00:00:44,386 INFO L87 Difference]: Start difference. First operand 571 states and 571 transitions. Second operand 144 states. [2018-10-01 00:00:45,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:45,699 INFO L93 Difference]: Finished difference Result 577 states and 577 transitions. [2018-10-01 00:00:45,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2018-10-01 00:00:45,701 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 570 [2018-10-01 00:00:45,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:45,702 INFO L225 Difference]: With dead ends: 577 [2018-10-01 00:00:45,702 INFO L226 Difference]: Without dead ends: 575 [2018-10-01 00:00:45,702 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 712 GetRequests, 570 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=10296, Invalid=10296, Unknown=0, NotChecked=0, Total=20592 [2018-10-01 00:00:45,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2018-10-01 00:00:45,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 575. [2018-10-01 00:00:45,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 575 states. [2018-10-01 00:00:45,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 575 transitions. [2018-10-01 00:00:45,705 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 575 transitions. Word has length 570 [2018-10-01 00:00:45,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:45,706 INFO L480 AbstractCegarLoop]: Abstraction has 575 states and 575 transitions. [2018-10-01 00:00:45,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-10-01 00:00:45,706 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 575 transitions. [2018-10-01 00:00:45,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 575 [2018-10-01 00:00:45,708 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:45,708 INFO L375 BasicCegarLoop]: trace histogram [142, 142, 142, 142, 1, 1, 1, 1, 1, 1] [2018-10-01 00:00:45,708 INFO L423 AbstractCegarLoop]: === Iteration 144 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:45,708 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:45,709 INFO L82 PathProgramCache]: Analyzing trace with hash 2101864920, now seen corresponding path program 142 times [2018-10-01 00:00:45,709 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:45,709 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:45,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:45,709 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:45,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:45,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:53,305 INFO L134 CoverageAnalysis]: Checked inductivity of 40186 backedges. 0 proven. 40186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:53,305 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:53,306 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:53,330 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:00:53,452 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:00:53,452 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:53,459 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:53,688 INFO L134 CoverageAnalysis]: Checked inductivity of 40186 backedges. 0 proven. 40186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:53,710 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:53,710 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [144, 144] total 144 [2018-10-01 00:00:53,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 145 states [2018-10-01 00:00:53,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2018-10-01 00:00:53,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10440, Invalid=10440, Unknown=0, NotChecked=0, Total=20880 [2018-10-01 00:00:53,712 INFO L87 Difference]: Start difference. First operand 575 states and 575 transitions. Second operand 145 states. [2018-10-01 00:00:54,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:54,302 INFO L93 Difference]: Finished difference Result 581 states and 581 transitions. [2018-10-01 00:00:54,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2018-10-01 00:00:54,302 INFO L78 Accepts]: Start accepts. Automaton has 145 states. Word has length 574 [2018-10-01 00:00:54,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:54,303 INFO L225 Difference]: With dead ends: 581 [2018-10-01 00:00:54,303 INFO L226 Difference]: Without dead ends: 579 [2018-10-01 00:00:54,304 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 717 GetRequests, 574 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=10440, Invalid=10440, Unknown=0, NotChecked=0, Total=20880 [2018-10-01 00:00:54,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2018-10-01 00:00:54,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 579. [2018-10-01 00:00:54,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 579 states. [2018-10-01 00:00:54,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 579 transitions. [2018-10-01 00:00:54,307 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 579 transitions. Word has length 574 [2018-10-01 00:00:54,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:54,308 INFO L480 AbstractCegarLoop]: Abstraction has 579 states and 579 transitions. [2018-10-01 00:00:54,308 INFO L481 AbstractCegarLoop]: Interpolant automaton has 145 states. [2018-10-01 00:00:54,308 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 579 transitions. [2018-10-01 00:00:54,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 579 [2018-10-01 00:00:54,310 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:54,310 INFO L375 BasicCegarLoop]: trace histogram [143, 143, 143, 143, 1, 1, 1, 1, 1, 1] [2018-10-01 00:00:54,310 INFO L423 AbstractCegarLoop]: === Iteration 145 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:54,310 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:54,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1130400642, now seen corresponding path program 143 times [2018-10-01 00:00:54,311 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:54,311 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:54,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:54,311 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:54,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:54,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:02,216 INFO L134 CoverageAnalysis]: Checked inductivity of 40755 backedges. 0 proven. 40755 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:02,216 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:02,217 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:02,223 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:01:02,563 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 144 check-sat command(s) [2018-10-01 00:01:02,563 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:02,570 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:02,800 INFO L134 CoverageAnalysis]: Checked inductivity of 40755 backedges. 0 proven. 40755 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:02,821 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:02,821 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [145, 145] total 145 [2018-10-01 00:01:02,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 146 states [2018-10-01 00:01:02,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2018-10-01 00:01:02,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10585, Invalid=10585, Unknown=0, NotChecked=0, Total=21170 [2018-10-01 00:01:02,823 INFO L87 Difference]: Start difference. First operand 579 states and 579 transitions. Second operand 146 states. [2018-10-01 00:01:04,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:04,171 INFO L93 Difference]: Finished difference Result 585 states and 585 transitions. [2018-10-01 00:01:04,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2018-10-01 00:01:04,171 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 578 [2018-10-01 00:01:04,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:04,173 INFO L225 Difference]: With dead ends: 585 [2018-10-01 00:01:04,173 INFO L226 Difference]: Without dead ends: 583 [2018-10-01 00:01:04,174 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 722 GetRequests, 578 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=10585, Invalid=10585, Unknown=0, NotChecked=0, Total=21170 [2018-10-01 00:01:04,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2018-10-01 00:01:04,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 583. [2018-10-01 00:01:04,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 583 states. [2018-10-01 00:01:04,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 583 transitions. [2018-10-01 00:01:04,177 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 583 transitions. Word has length 578 [2018-10-01 00:01:04,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:04,177 INFO L480 AbstractCegarLoop]: Abstraction has 583 states and 583 transitions. [2018-10-01 00:01:04,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has 146 states. [2018-10-01 00:01:04,178 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 583 transitions. [2018-10-01 00:01:04,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 583 [2018-10-01 00:01:04,180 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:04,180 INFO L375 BasicCegarLoop]: trace histogram [144, 144, 144, 144, 1, 1, 1, 1, 1, 1] [2018-10-01 00:01:04,180 INFO L423 AbstractCegarLoop]: === Iteration 146 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:04,180 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:04,180 INFO L82 PathProgramCache]: Analyzing trace with hash 597444652, now seen corresponding path program 144 times [2018-10-01 00:01:04,180 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:04,180 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:04,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:04,181 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:04,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:04,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:12,256 INFO L134 CoverageAnalysis]: Checked inductivity of 41328 backedges. 0 proven. 41328 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:12,257 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:12,257 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:12,265 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:01:12,605 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 145 check-sat command(s) [2018-10-01 00:01:12,605 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:12,611 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:12,863 INFO L134 CoverageAnalysis]: Checked inductivity of 41328 backedges. 0 proven. 41328 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:12,885 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:12,885 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [146, 146] total 146 [2018-10-01 00:01:12,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 147 states [2018-10-01 00:01:12,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2018-10-01 00:01:12,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10731, Invalid=10731, Unknown=0, NotChecked=0, Total=21462 [2018-10-01 00:01:12,887 INFO L87 Difference]: Start difference. First operand 583 states and 583 transitions. Second operand 147 states. [2018-10-01 00:01:14,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:14,274 INFO L93 Difference]: Finished difference Result 589 states and 589 transitions. [2018-10-01 00:01:14,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2018-10-01 00:01:14,275 INFO L78 Accepts]: Start accepts. Automaton has 147 states. Word has length 582 [2018-10-01 00:01:14,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:14,276 INFO L225 Difference]: With dead ends: 589 [2018-10-01 00:01:14,276 INFO L226 Difference]: Without dead ends: 587 [2018-10-01 00:01:14,278 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 727 GetRequests, 582 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=10731, Invalid=10731, Unknown=0, NotChecked=0, Total=21462 [2018-10-01 00:01:14,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2018-10-01 00:01:14,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 587. [2018-10-01 00:01:14,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 587 states. [2018-10-01 00:01:14,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 587 transitions. [2018-10-01 00:01:14,282 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 587 transitions. Word has length 582 [2018-10-01 00:01:14,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:14,283 INFO L480 AbstractCegarLoop]: Abstraction has 587 states and 587 transitions. [2018-10-01 00:01:14,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has 147 states. [2018-10-01 00:01:14,283 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 587 transitions. [2018-10-01 00:01:14,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 587 [2018-10-01 00:01:14,286 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:14,286 INFO L375 BasicCegarLoop]: trace histogram [145, 145, 145, 145, 1, 1, 1, 1, 1, 1] [2018-10-01 00:01:14,286 INFO L423 AbstractCegarLoop]: === Iteration 147 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:14,287 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:14,287 INFO L82 PathProgramCache]: Analyzing trace with hash -789209130, now seen corresponding path program 145 times [2018-10-01 00:01:14,287 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:14,287 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:14,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:14,288 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:14,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:14,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:22,626 INFO L134 CoverageAnalysis]: Checked inductivity of 41905 backedges. 0 proven. 41905 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:22,627 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:22,627 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:22,634 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:01:22,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:22,750 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:23,004 INFO L134 CoverageAnalysis]: Checked inductivity of 41905 backedges. 0 proven. 41905 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:23,025 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:23,025 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [147, 147] total 147 [2018-10-01 00:01:23,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 148 states [2018-10-01 00:01:23,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2018-10-01 00:01:23,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10878, Invalid=10878, Unknown=0, NotChecked=0, Total=21756 [2018-10-01 00:01:23,027 INFO L87 Difference]: Start difference. First operand 587 states and 587 transitions. Second operand 148 states. [2018-10-01 00:01:24,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:24,476 INFO L93 Difference]: Finished difference Result 593 states and 593 transitions. [2018-10-01 00:01:24,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2018-10-01 00:01:24,477 INFO L78 Accepts]: Start accepts. Automaton has 148 states. Word has length 586 [2018-10-01 00:01:24,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:24,478 INFO L225 Difference]: With dead ends: 593 [2018-10-01 00:01:24,478 INFO L226 Difference]: Without dead ends: 591 [2018-10-01 00:01:24,479 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 586 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=10878, Invalid=10878, Unknown=0, NotChecked=0, Total=21756 [2018-10-01 00:01:24,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2018-10-01 00:01:24,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 591. [2018-10-01 00:01:24,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 591 states. [2018-10-01 00:01:24,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 591 transitions. [2018-10-01 00:01:24,483 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 591 transitions. Word has length 586 [2018-10-01 00:01:24,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:24,483 INFO L480 AbstractCegarLoop]: Abstraction has 591 states and 591 transitions. [2018-10-01 00:01:24,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has 148 states. [2018-10-01 00:01:24,484 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 591 transitions. [2018-10-01 00:01:24,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 591 [2018-10-01 00:01:24,487 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:24,487 INFO L375 BasicCegarLoop]: trace histogram [146, 146, 146, 146, 1, 1, 1, 1, 1, 1] [2018-10-01 00:01:24,487 INFO L423 AbstractCegarLoop]: === Iteration 148 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:24,487 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:24,487 INFO L82 PathProgramCache]: Analyzing trace with hash -47771008, now seen corresponding path program 146 times [2018-10-01 00:01:24,487 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:24,488 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:24,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:24,488 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:01:24,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:24,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:32,793 INFO L134 CoverageAnalysis]: Checked inductivity of 42486 backedges. 0 proven. 42486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:32,793 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:32,793 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:32,821 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:01:32,933 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:01:32,933 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:32,940 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:33,158 INFO L134 CoverageAnalysis]: Checked inductivity of 42486 backedges. 0 proven. 42486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:33,178 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:33,178 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [148, 148] total 148 [2018-10-01 00:01:33,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 149 states [2018-10-01 00:01:33,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2018-10-01 00:01:33,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11026, Invalid=11026, Unknown=0, NotChecked=0, Total=22052 [2018-10-01 00:01:33,180 INFO L87 Difference]: Start difference. First operand 591 states and 591 transitions. Second operand 149 states. [2018-10-01 00:01:34,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:34,721 INFO L93 Difference]: Finished difference Result 597 states and 597 transitions. [2018-10-01 00:01:34,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2018-10-01 00:01:34,721 INFO L78 Accepts]: Start accepts. Automaton has 149 states. Word has length 590 [2018-10-01 00:01:34,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:34,722 INFO L225 Difference]: With dead ends: 597 [2018-10-01 00:01:34,722 INFO L226 Difference]: Without dead ends: 595 [2018-10-01 00:01:34,724 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 737 GetRequests, 590 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=11026, Invalid=11026, Unknown=0, NotChecked=0, Total=22052 [2018-10-01 00:01:34,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2018-10-01 00:01:34,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 595. [2018-10-01 00:01:34,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 595 states. [2018-10-01 00:01:34,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 595 transitions. [2018-10-01 00:01:34,727 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 595 transitions. Word has length 590 [2018-10-01 00:01:34,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:34,728 INFO L480 AbstractCegarLoop]: Abstraction has 595 states and 595 transitions. [2018-10-01 00:01:34,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has 149 states. [2018-10-01 00:01:34,728 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 595 transitions. [2018-10-01 00:01:34,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 595 [2018-10-01 00:01:34,730 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:34,730 INFO L375 BasicCegarLoop]: trace histogram [147, 147, 147, 147, 1, 1, 1, 1, 1, 1] [2018-10-01 00:01:34,731 INFO L423 AbstractCegarLoop]: === Iteration 149 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:34,731 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:34,731 INFO L82 PathProgramCache]: Analyzing trace with hash -123002838, now seen corresponding path program 147 times [2018-10-01 00:01:34,731 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:34,731 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:34,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:34,731 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:34,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:34,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:43,180 INFO L134 CoverageAnalysis]: Checked inductivity of 43071 backedges. 0 proven. 43071 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:43,180 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:43,181 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:43,188 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:01:43,551 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 148 check-sat command(s) [2018-10-01 00:01:43,551 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:43,558 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:43,825 INFO L134 CoverageAnalysis]: Checked inductivity of 43071 backedges. 0 proven. 43071 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:43,847 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:43,847 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [149, 149] total 149 [2018-10-01 00:01:43,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 150 states [2018-10-01 00:01:43,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2018-10-01 00:01:43,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11175, Invalid=11175, Unknown=0, NotChecked=0, Total=22350 [2018-10-01 00:01:43,849 INFO L87 Difference]: Start difference. First operand 595 states and 595 transitions. Second operand 150 states. [2018-10-01 00:01:44,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:44,876 INFO L93 Difference]: Finished difference Result 601 states and 601 transitions. [2018-10-01 00:01:44,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2018-10-01 00:01:44,876 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 594 [2018-10-01 00:01:44,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:44,877 INFO L225 Difference]: With dead ends: 601 [2018-10-01 00:01:44,877 INFO L226 Difference]: Without dead ends: 599 [2018-10-01 00:01:44,878 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 742 GetRequests, 594 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=11175, Invalid=11175, Unknown=0, NotChecked=0, Total=22350 [2018-10-01 00:01:44,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2018-10-01 00:01:44,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 599. [2018-10-01 00:01:44,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 599 states. [2018-10-01 00:01:44,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 599 transitions. [2018-10-01 00:01:44,881 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 599 transitions. Word has length 594 [2018-10-01 00:01:44,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:44,882 INFO L480 AbstractCegarLoop]: Abstraction has 599 states and 599 transitions. [2018-10-01 00:01:44,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has 150 states. [2018-10-01 00:01:44,882 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 599 transitions. [2018-10-01 00:01:44,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 599 [2018-10-01 00:01:44,884 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:44,884 INFO L375 BasicCegarLoop]: trace histogram [148, 148, 148, 148, 1, 1, 1, 1, 1, 1] [2018-10-01 00:01:44,884 INFO L423 AbstractCegarLoop]: === Iteration 150 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:44,885 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:44,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1388071124, now seen corresponding path program 148 times [2018-10-01 00:01:44,885 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:44,885 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:44,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:44,885 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:44,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:44,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:53,503 INFO L134 CoverageAnalysis]: Checked inductivity of 43660 backedges. 0 proven. 43660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:53,503 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:53,504 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:53,527 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:01:53,646 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:01:53,646 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:53,652 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:53,895 INFO L134 CoverageAnalysis]: Checked inductivity of 43660 backedges. 0 proven. 43660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:53,916 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:53,916 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [150, 150] total 150 [2018-10-01 00:01:53,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 151 states [2018-10-01 00:01:53,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2018-10-01 00:01:53,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11325, Invalid=11325, Unknown=0, NotChecked=0, Total=22650 [2018-10-01 00:01:53,919 INFO L87 Difference]: Start difference. First operand 599 states and 599 transitions. Second operand 151 states. [2018-10-01 00:01:54,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:54,788 INFO L93 Difference]: Finished difference Result 605 states and 605 transitions. [2018-10-01 00:01:54,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2018-10-01 00:01:54,789 INFO L78 Accepts]: Start accepts. Automaton has 151 states. Word has length 598 [2018-10-01 00:01:54,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:54,790 INFO L225 Difference]: With dead ends: 605 [2018-10-01 00:01:54,790 INFO L226 Difference]: Without dead ends: 603 [2018-10-01 00:01:54,791 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 747 GetRequests, 598 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=11325, Invalid=11325, Unknown=0, NotChecked=0, Total=22650 [2018-10-01 00:01:54,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2018-10-01 00:01:54,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 603. [2018-10-01 00:01:54,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 603 states. [2018-10-01 00:01:54,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 603 transitions. [2018-10-01 00:01:54,795 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 603 transitions. Word has length 598 [2018-10-01 00:01:54,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:54,795 INFO L480 AbstractCegarLoop]: Abstraction has 603 states and 603 transitions. [2018-10-01 00:01:54,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has 151 states. [2018-10-01 00:01:54,796 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 603 transitions. [2018-10-01 00:01:54,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 603 [2018-10-01 00:01:54,798 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:54,798 INFO L375 BasicCegarLoop]: trace histogram [149, 149, 149, 149, 1, 1, 1, 1, 1, 1] [2018-10-01 00:01:54,798 INFO L423 AbstractCegarLoop]: === Iteration 151 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:54,798 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:54,798 INFO L82 PathProgramCache]: Analyzing trace with hash 2035616894, now seen corresponding path program 149 times [2018-10-01 00:01:54,799 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:54,799 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:54,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:54,799 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:54,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:54,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:03,390 INFO L134 CoverageAnalysis]: Checked inductivity of 44253 backedges. 0 proven. 44253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:03,390 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:03,390 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:03,397 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:02:03,753 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 150 check-sat command(s) [2018-10-01 00:02:03,753 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:02:03,760 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:04,015 INFO L134 CoverageAnalysis]: Checked inductivity of 44253 backedges. 0 proven. 44253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:04,036 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:04,036 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [151, 151] total 151 [2018-10-01 00:02:04,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 152 states [2018-10-01 00:02:04,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2018-10-01 00:02:04,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11476, Invalid=11476, Unknown=0, NotChecked=0, Total=22952 [2018-10-01 00:02:04,039 INFO L87 Difference]: Start difference. First operand 603 states and 603 transitions. Second operand 152 states. [2018-10-01 00:02:05,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:05,926 INFO L93 Difference]: Finished difference Result 609 states and 609 transitions. [2018-10-01 00:02:05,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2018-10-01 00:02:05,926 INFO L78 Accepts]: Start accepts. Automaton has 152 states. Word has length 602 [2018-10-01 00:02:05,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:05,927 INFO L225 Difference]: With dead ends: 609 [2018-10-01 00:02:05,927 INFO L226 Difference]: Without dead ends: 607 [2018-10-01 00:02:05,928 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 752 GetRequests, 602 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=11476, Invalid=11476, Unknown=0, NotChecked=0, Total=22952 [2018-10-01 00:02:05,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2018-10-01 00:02:05,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 607. [2018-10-01 00:02:05,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 607 states. [2018-10-01 00:02:05,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 607 transitions. [2018-10-01 00:02:05,931 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 607 transitions. Word has length 602 [2018-10-01 00:02:05,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:05,931 INFO L480 AbstractCegarLoop]: Abstraction has 607 states and 607 transitions. [2018-10-01 00:02:05,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has 152 states. [2018-10-01 00:02:05,931 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 607 transitions. [2018-10-01 00:02:05,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 607 [2018-10-01 00:02:05,934 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:05,934 INFO L375 BasicCegarLoop]: trace histogram [150, 150, 150, 150, 1, 1, 1, 1, 1, 1] [2018-10-01 00:02:05,934 INFO L423 AbstractCegarLoop]: === Iteration 152 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:05,934 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:05,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1496312616, now seen corresponding path program 150 times [2018-10-01 00:02:05,934 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:05,934 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:05,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:05,935 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:02:05,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:06,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:14,397 INFO L134 CoverageAnalysis]: Checked inductivity of 44850 backedges. 0 proven. 44850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:14,397 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:14,397 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:14,404 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:02:14,727 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 151 check-sat command(s) [2018-10-01 00:02:14,728 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:02:14,735 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:15,004 INFO L134 CoverageAnalysis]: Checked inductivity of 44850 backedges. 0 proven. 44850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:15,025 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:15,025 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [152, 152] total 152 [2018-10-01 00:02:15,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 153 states [2018-10-01 00:02:15,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 153 interpolants. [2018-10-01 00:02:15,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11628, Invalid=11628, Unknown=0, NotChecked=0, Total=23256 [2018-10-01 00:02:15,028 INFO L87 Difference]: Start difference. First operand 607 states and 607 transitions. Second operand 153 states. [2018-10-01 00:02:16,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:16,514 INFO L93 Difference]: Finished difference Result 613 states and 613 transitions. [2018-10-01 00:02:16,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2018-10-01 00:02:16,514 INFO L78 Accepts]: Start accepts. Automaton has 153 states. Word has length 606 [2018-10-01 00:02:16,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:16,516 INFO L225 Difference]: With dead ends: 613 [2018-10-01 00:02:16,516 INFO L226 Difference]: Without dead ends: 611 [2018-10-01 00:02:16,517 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 757 GetRequests, 606 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=11628, Invalid=11628, Unknown=0, NotChecked=0, Total=23256 [2018-10-01 00:02:16,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2018-10-01 00:02:16,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 611. [2018-10-01 00:02:16,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 611 states. [2018-10-01 00:02:16,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 611 transitions. [2018-10-01 00:02:16,521 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 611 transitions. Word has length 606 [2018-10-01 00:02:16,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:16,521 INFO L480 AbstractCegarLoop]: Abstraction has 611 states and 611 transitions. [2018-10-01 00:02:16,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has 153 states. [2018-10-01 00:02:16,522 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 611 transitions. [2018-10-01 00:02:16,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 611 [2018-10-01 00:02:16,524 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:16,524 INFO L375 BasicCegarLoop]: trace histogram [151, 151, 151, 151, 1, 1, 1, 1, 1, 1] [2018-10-01 00:02:16,524 INFO L423 AbstractCegarLoop]: === Iteration 153 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:16,525 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:16,525 INFO L82 PathProgramCache]: Analyzing trace with hash -37264174, now seen corresponding path program 151 times [2018-10-01 00:02:16,525 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:16,525 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:16,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:16,526 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:02:16,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:16,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:25,158 INFO L134 CoverageAnalysis]: Checked inductivity of 45451 backedges. 0 proven. 45451 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:25,158 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:25,158 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:25,166 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:02:25,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:25,290 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:25,564 INFO L134 CoverageAnalysis]: Checked inductivity of 45451 backedges. 0 proven. 45451 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:25,584 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:25,584 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [153, 153] total 153 [2018-10-01 00:02:25,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 154 states [2018-10-01 00:02:25,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2018-10-01 00:02:25,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11781, Invalid=11781, Unknown=0, NotChecked=0, Total=23562 [2018-10-01 00:02:25,586 INFO L87 Difference]: Start difference. First operand 611 states and 611 transitions. Second operand 154 states. [2018-10-01 00:02:27,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:27,220 INFO L93 Difference]: Finished difference Result 617 states and 617 transitions. [2018-10-01 00:02:27,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2018-10-01 00:02:27,221 INFO L78 Accepts]: Start accepts. Automaton has 154 states. Word has length 610 [2018-10-01 00:02:27,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:27,222 INFO L225 Difference]: With dead ends: 617 [2018-10-01 00:02:27,222 INFO L226 Difference]: Without dead ends: 615 [2018-10-01 00:02:27,223 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 762 GetRequests, 610 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=11781, Invalid=11781, Unknown=0, NotChecked=0, Total=23562 [2018-10-01 00:02:27,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2018-10-01 00:02:27,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 615. [2018-10-01 00:02:27,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 615 states. [2018-10-01 00:02:27,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 615 transitions. [2018-10-01 00:02:27,227 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 615 transitions. Word has length 610 [2018-10-01 00:02:27,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:27,228 INFO L480 AbstractCegarLoop]: Abstraction has 615 states and 615 transitions. [2018-10-01 00:02:27,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has 154 states. [2018-10-01 00:02:27,228 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 615 transitions. [2018-10-01 00:02:27,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 615 [2018-10-01 00:02:27,231 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:27,231 INFO L375 BasicCegarLoop]: trace histogram [152, 152, 152, 152, 1, 1, 1, 1, 1, 1] [2018-10-01 00:02:27,231 INFO L423 AbstractCegarLoop]: === Iteration 154 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:27,231 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:27,231 INFO L82 PathProgramCache]: Analyzing trace with hash 827718012, now seen corresponding path program 152 times [2018-10-01 00:02:27,231 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:27,231 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:27,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:27,232 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:02:27,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:27,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:35,909 INFO L134 CoverageAnalysis]: Checked inductivity of 46056 backedges. 0 proven. 46056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:35,909 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:35,909 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:35,917 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:02:36,032 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:02:36,033 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:02:36,040 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:36,287 INFO L134 CoverageAnalysis]: Checked inductivity of 46056 backedges. 0 proven. 46056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:36,307 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:36,307 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [154, 154] total 154 [2018-10-01 00:02:36,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 155 states [2018-10-01 00:02:36,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 155 interpolants. [2018-10-01 00:02:36,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11935, Invalid=11935, Unknown=0, NotChecked=0, Total=23870 [2018-10-01 00:02:36,309 INFO L87 Difference]: Start difference. First operand 615 states and 615 transitions. Second operand 155 states. [2018-10-01 00:02:37,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:37,610 INFO L93 Difference]: Finished difference Result 621 states and 621 transitions. [2018-10-01 00:02:37,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2018-10-01 00:02:37,611 INFO L78 Accepts]: Start accepts. Automaton has 155 states. Word has length 614 [2018-10-01 00:02:37,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:37,611 INFO L225 Difference]: With dead ends: 621 [2018-10-01 00:02:37,612 INFO L226 Difference]: Without dead ends: 619 [2018-10-01 00:02:37,613 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 767 GetRequests, 614 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=11935, Invalid=11935, Unknown=0, NotChecked=0, Total=23870 [2018-10-01 00:02:37,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2018-10-01 00:02:37,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 619. [2018-10-01 00:02:37,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 619 states. [2018-10-01 00:02:37,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 619 transitions. [2018-10-01 00:02:37,617 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 619 transitions. Word has length 614 [2018-10-01 00:02:37,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:37,617 INFO L480 AbstractCegarLoop]: Abstraction has 619 states and 619 transitions. [2018-10-01 00:02:37,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has 155 states. [2018-10-01 00:02:37,617 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 619 transitions. [2018-10-01 00:02:37,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 619 [2018-10-01 00:02:37,620 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:37,620 INFO L375 BasicCegarLoop]: trace histogram [153, 153, 153, 153, 1, 1, 1, 1, 1, 1] [2018-10-01 00:02:37,620 INFO L423 AbstractCegarLoop]: === Iteration 155 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:37,620 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:37,621 INFO L82 PathProgramCache]: Analyzing trace with hash 483797286, now seen corresponding path program 153 times [2018-10-01 00:02:37,621 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:37,621 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:37,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:37,621 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:02:37,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:37,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:46,554 INFO L134 CoverageAnalysis]: Checked inductivity of 46665 backedges. 0 proven. 46665 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:46,555 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:46,555 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:46,562 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:02:46,936 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 154 check-sat command(s) [2018-10-01 00:02:46,937 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:02:46,943 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:47,242 INFO L134 CoverageAnalysis]: Checked inductivity of 46665 backedges. 0 proven. 46665 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:47,262 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:47,263 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [155, 155] total 155 [2018-10-01 00:02:47,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 156 states [2018-10-01 00:02:47,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2018-10-01 00:02:47,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12090, Invalid=12090, Unknown=0, NotChecked=0, Total=24180 [2018-10-01 00:02:47,265 INFO L87 Difference]: Start difference. First operand 619 states and 619 transitions. Second operand 156 states. [2018-10-01 00:02:49,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:49,279 INFO L93 Difference]: Finished difference Result 625 states and 625 transitions. [2018-10-01 00:02:49,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2018-10-01 00:02:49,280 INFO L78 Accepts]: Start accepts. Automaton has 156 states. Word has length 618 [2018-10-01 00:02:49,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:49,281 INFO L225 Difference]: With dead ends: 625 [2018-10-01 00:02:49,281 INFO L226 Difference]: Without dead ends: 623 [2018-10-01 00:02:49,282 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 772 GetRequests, 618 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=12090, Invalid=12090, Unknown=0, NotChecked=0, Total=24180 [2018-10-01 00:02:49,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2018-10-01 00:02:49,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 623. [2018-10-01 00:02:49,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 623 states. [2018-10-01 00:02:49,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 623 transitions. [2018-10-01 00:02:49,286 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 623 transitions. Word has length 618 [2018-10-01 00:02:49,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:49,286 INFO L480 AbstractCegarLoop]: Abstraction has 623 states and 623 transitions. [2018-10-01 00:02:49,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has 156 states. [2018-10-01 00:02:49,286 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 623 transitions. [2018-10-01 00:02:49,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 623 [2018-10-01 00:02:49,289 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:49,289 INFO L375 BasicCegarLoop]: trace histogram [154, 154, 154, 154, 1, 1, 1, 1, 1, 1] [2018-10-01 00:02:49,289 INFO L423 AbstractCegarLoop]: === Iteration 156 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:49,289 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:49,289 INFO L82 PathProgramCache]: Analyzing trace with hash -402492464, now seen corresponding path program 154 times [2018-10-01 00:02:49,289 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:49,289 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:49,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:49,290 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:02:49,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:49,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:58,575 INFO L134 CoverageAnalysis]: Checked inductivity of 47278 backedges. 0 proven. 47278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:58,576 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:58,576 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:58,608 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:02:58,735 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:02:58,735 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:02:58,742 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:59,013 INFO L134 CoverageAnalysis]: Checked inductivity of 47278 backedges. 0 proven. 47278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:59,034 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:59,034 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [156, 156] total 156 [2018-10-01 00:02:59,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 157 states [2018-10-01 00:02:59,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 157 interpolants. [2018-10-01 00:02:59,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12246, Invalid=12246, Unknown=0, NotChecked=0, Total=24492 [2018-10-01 00:02:59,036 INFO L87 Difference]: Start difference. First operand 623 states and 623 transitions. Second operand 157 states. [2018-10-01 00:03:00,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:03:00,310 INFO L93 Difference]: Finished difference Result 629 states and 629 transitions. [2018-10-01 00:03:00,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2018-10-01 00:03:00,311 INFO L78 Accepts]: Start accepts. Automaton has 157 states. Word has length 622 [2018-10-01 00:03:00,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:03:00,312 INFO L225 Difference]: With dead ends: 629 [2018-10-01 00:03:00,312 INFO L226 Difference]: Without dead ends: 627 [2018-10-01 00:03:00,313 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 777 GetRequests, 622 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=12246, Invalid=12246, Unknown=0, NotChecked=0, Total=24492 [2018-10-01 00:03:00,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2018-10-01 00:03:00,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 627. [2018-10-01 00:03:00,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 627 states. [2018-10-01 00:03:00,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 627 transitions. [2018-10-01 00:03:00,317 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 627 transitions. Word has length 622 [2018-10-01 00:03:00,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:03:00,317 INFO L480 AbstractCegarLoop]: Abstraction has 627 states and 627 transitions. [2018-10-01 00:03:00,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has 157 states. [2018-10-01 00:03:00,317 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 627 transitions. [2018-10-01 00:03:00,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 627 [2018-10-01 00:03:00,320 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:03:00,320 INFO L375 BasicCegarLoop]: trace histogram [155, 155, 155, 155, 1, 1, 1, 1, 1, 1] [2018-10-01 00:03:00,320 INFO L423 AbstractCegarLoop]: === Iteration 157 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:03:00,320 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:03:00,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1498765690, now seen corresponding path program 155 times [2018-10-01 00:03:00,320 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:03:00,320 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:03:00,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:00,321 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:03:00,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:00,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:09,678 INFO L134 CoverageAnalysis]: Checked inductivity of 47895 backedges. 0 proven. 47895 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:09,679 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:03:09,679 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:03:09,685 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:03:10,065 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 156 check-sat command(s) [2018-10-01 00:03:10,066 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:03:10,073 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:03:10,317 INFO L134 CoverageAnalysis]: Checked inductivity of 47895 backedges. 0 proven. 47895 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:10,337 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:03:10,338 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [157, 157] total 157 [2018-10-01 00:03:10,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 158 states [2018-10-01 00:03:10,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2018-10-01 00:03:10,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12403, Invalid=12403, Unknown=0, NotChecked=0, Total=24806 [2018-10-01 00:03:10,340 INFO L87 Difference]: Start difference. First operand 627 states and 627 transitions. Second operand 158 states. [2018-10-01 00:03:11,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:03:11,125 INFO L93 Difference]: Finished difference Result 633 states and 633 transitions. [2018-10-01 00:03:11,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2018-10-01 00:03:11,126 INFO L78 Accepts]: Start accepts. Automaton has 158 states. Word has length 626 [2018-10-01 00:03:11,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:03:11,127 INFO L225 Difference]: With dead ends: 633 [2018-10-01 00:03:11,127 INFO L226 Difference]: Without dead ends: 631 [2018-10-01 00:03:11,129 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 782 GetRequests, 626 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=12403, Invalid=12403, Unknown=0, NotChecked=0, Total=24806 [2018-10-01 00:03:11,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2018-10-01 00:03:11,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 631. [2018-10-01 00:03:11,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 631 states. [2018-10-01 00:03:11,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 631 transitions. [2018-10-01 00:03:11,132 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 631 transitions. Word has length 626 [2018-10-01 00:03:11,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:03:11,132 INFO L480 AbstractCegarLoop]: Abstraction has 631 states and 631 transitions. [2018-10-01 00:03:11,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has 158 states. [2018-10-01 00:03:11,132 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 631 transitions. [2018-10-01 00:03:11,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 631 [2018-10-01 00:03:11,135 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:03:11,135 INFO L375 BasicCegarLoop]: trace histogram [156, 156, 156, 156, 1, 1, 1, 1, 1, 1] [2018-10-01 00:03:11,135 INFO L423 AbstractCegarLoop]: === Iteration 158 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:03:11,135 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:03:11,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1980324388, now seen corresponding path program 156 times [2018-10-01 00:03:11,136 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:03:11,136 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:03:11,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:11,136 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:03:11,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:11,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:20,496 INFO L134 CoverageAnalysis]: Checked inductivity of 48516 backedges. 0 proven. 48516 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:20,496 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:03:20,496 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:03:20,503 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:03:20,876 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 157 check-sat command(s) [2018-10-01 00:03:20,876 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:03:20,883 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:03:21,178 INFO L134 CoverageAnalysis]: Checked inductivity of 48516 backedges. 0 proven. 48516 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:21,198 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:03:21,199 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [158, 158] total 158 [2018-10-01 00:03:21,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 159 states [2018-10-01 00:03:21,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 159 interpolants. [2018-10-01 00:03:21,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12561, Invalid=12561, Unknown=0, NotChecked=0, Total=25122 [2018-10-01 00:03:21,201 INFO L87 Difference]: Start difference. First operand 631 states and 631 transitions. Second operand 159 states. [2018-10-01 00:03:22,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:03:22,498 INFO L93 Difference]: Finished difference Result 637 states and 637 transitions. [2018-10-01 00:03:22,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2018-10-01 00:03:22,499 INFO L78 Accepts]: Start accepts. Automaton has 159 states. Word has length 630 [2018-10-01 00:03:22,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:03:22,500 INFO L225 Difference]: With dead ends: 637 [2018-10-01 00:03:22,500 INFO L226 Difference]: Without dead ends: 635 [2018-10-01 00:03:22,501 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 787 GetRequests, 630 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=12561, Invalid=12561, Unknown=0, NotChecked=0, Total=25122 [2018-10-01 00:03:22,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2018-10-01 00:03:22,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 635. [2018-10-01 00:03:22,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 635 states. [2018-10-01 00:03:22,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 635 transitions. [2018-10-01 00:03:22,505 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 635 transitions. Word has length 630 [2018-10-01 00:03:22,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:03:22,505 INFO L480 AbstractCegarLoop]: Abstraction has 635 states and 635 transitions. [2018-10-01 00:03:22,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has 159 states. [2018-10-01 00:03:22,505 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 635 transitions. [2018-10-01 00:03:22,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 635 [2018-10-01 00:03:22,508 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:03:22,508 INFO L375 BasicCegarLoop]: trace histogram [157, 157, 157, 157, 1, 1, 1, 1, 1, 1] [2018-10-01 00:03:22,508 INFO L423 AbstractCegarLoop]: === Iteration 159 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:03:22,508 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:03:22,508 INFO L82 PathProgramCache]: Analyzing trace with hash 572061134, now seen corresponding path program 157 times [2018-10-01 00:03:22,508 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:03:22,508 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:03:22,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:22,509 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:03:22,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:22,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:31,900 INFO L134 CoverageAnalysis]: Checked inductivity of 49141 backedges. 0 proven. 49141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:31,901 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:03:31,901 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:03:31,908 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:03:32,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:32,032 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:03:32,314 INFO L134 CoverageAnalysis]: Checked inductivity of 49141 backedges. 0 proven. 49141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:32,335 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:03:32,335 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [159, 159] total 159 [2018-10-01 00:03:32,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 160 states [2018-10-01 00:03:32,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2018-10-01 00:03:32,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12720, Invalid=12720, Unknown=0, NotChecked=0, Total=25440 [2018-10-01 00:03:32,337 INFO L87 Difference]: Start difference. First operand 635 states and 635 transitions. Second operand 160 states. [2018-10-01 00:03:33,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:03:33,855 INFO L93 Difference]: Finished difference Result 641 states and 641 transitions. [2018-10-01 00:03:33,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2018-10-01 00:03:33,855 INFO L78 Accepts]: Start accepts. Automaton has 160 states. Word has length 634 [2018-10-01 00:03:33,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:03:33,857 INFO L225 Difference]: With dead ends: 641 [2018-10-01 00:03:33,857 INFO L226 Difference]: Without dead ends: 639 [2018-10-01 00:03:33,858 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 792 GetRequests, 634 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=12720, Invalid=12720, Unknown=0, NotChecked=0, Total=25440 [2018-10-01 00:03:33,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2018-10-01 00:03:33,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 639. [2018-10-01 00:03:33,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 639 states. [2018-10-01 00:03:33,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 639 transitions. [2018-10-01 00:03:33,862 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 639 transitions. Word has length 634 [2018-10-01 00:03:33,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:03:33,863 INFO L480 AbstractCegarLoop]: Abstraction has 639 states and 639 transitions. [2018-10-01 00:03:33,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has 160 states. [2018-10-01 00:03:33,863 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 639 transitions. [2018-10-01 00:03:33,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 639 [2018-10-01 00:03:33,866 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:03:33,866 INFO L375 BasicCegarLoop]: trace histogram [158, 158, 158, 158, 1, 1, 1, 1, 1, 1] [2018-10-01 00:03:33,866 INFO L423 AbstractCegarLoop]: === Iteration 160 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:03:33,866 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:03:33,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1069634440, now seen corresponding path program 158 times [2018-10-01 00:03:33,866 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:03:33,866 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:03:33,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:33,867 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:03:33,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:33,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:43,254 INFO L134 CoverageAnalysis]: Checked inductivity of 49770 backedges. 0 proven. 49770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:43,255 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:03:43,255 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:03:43,262 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:03:43,382 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:03:43,382 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:03:43,389 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:03:43,631 INFO L134 CoverageAnalysis]: Checked inductivity of 49770 backedges. 0 proven. 49770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:43,652 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:03:43,652 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [160, 160] total 160 [2018-10-01 00:03:43,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 161 states [2018-10-01 00:03:43,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2018-10-01 00:03:43,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12880, Invalid=12880, Unknown=0, NotChecked=0, Total=25760 [2018-10-01 00:03:43,654 INFO L87 Difference]: Start difference. First operand 639 states and 639 transitions. Second operand 161 states. [2018-10-01 00:03:44,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:03:44,965 INFO L93 Difference]: Finished difference Result 645 states and 645 transitions. [2018-10-01 00:03:44,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2018-10-01 00:03:44,965 INFO L78 Accepts]: Start accepts. Automaton has 161 states. Word has length 638 [2018-10-01 00:03:44,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:03:44,967 INFO L225 Difference]: With dead ends: 645 [2018-10-01 00:03:44,967 INFO L226 Difference]: Without dead ends: 643 [2018-10-01 00:03:44,969 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 797 GetRequests, 638 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=12880, Invalid=12880, Unknown=0, NotChecked=0, Total=25760 [2018-10-01 00:03:44,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2018-10-01 00:03:44,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 643. [2018-10-01 00:03:44,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 643 states. [2018-10-01 00:03:44,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 643 transitions. [2018-10-01 00:03:44,973 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 643 transitions. Word has length 638 [2018-10-01 00:03:44,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:03:44,974 INFO L480 AbstractCegarLoop]: Abstraction has 643 states and 643 transitions. [2018-10-01 00:03:44,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has 161 states. [2018-10-01 00:03:44,974 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 643 transitions. [2018-10-01 00:03:44,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 643 [2018-10-01 00:03:44,977 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:03:44,978 INFO L375 BasicCegarLoop]: trace histogram [159, 159, 159, 159, 1, 1, 1, 1, 1, 1] [2018-10-01 00:03:44,978 INFO L423 AbstractCegarLoop]: === Iteration 161 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:03:44,978 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:03:44,978 INFO L82 PathProgramCache]: Analyzing trace with hash -772473310, now seen corresponding path program 159 times [2018-10-01 00:03:44,978 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:03:44,978 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:03:44,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:44,979 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:03:44,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:45,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:54,676 INFO L134 CoverageAnalysis]: Checked inductivity of 50403 backedges. 0 proven. 50403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:54,676 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:03:54,676 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:03:54,683 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:03:55,088 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 160 check-sat command(s) [2018-10-01 00:03:55,088 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:03:55,095 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:03:55,367 INFO L134 CoverageAnalysis]: Checked inductivity of 50403 backedges. 0 proven. 50403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:55,388 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:03:55,389 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [161, 161] total 161 [2018-10-01 00:03:55,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 162 states [2018-10-01 00:03:55,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2018-10-01 00:03:55,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13041, Invalid=13041, Unknown=0, NotChecked=0, Total=26082 [2018-10-01 00:03:55,391 INFO L87 Difference]: Start difference. First operand 643 states and 643 transitions. Second operand 162 states. [2018-10-01 00:03:56,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:03:56,208 INFO L93 Difference]: Finished difference Result 649 states and 649 transitions. [2018-10-01 00:03:56,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2018-10-01 00:03:56,208 INFO L78 Accepts]: Start accepts. Automaton has 162 states. Word has length 642 [2018-10-01 00:03:56,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:03:56,210 INFO L225 Difference]: With dead ends: 649 [2018-10-01 00:03:56,210 INFO L226 Difference]: Without dead ends: 647 [2018-10-01 00:03:56,211 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 802 GetRequests, 642 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=13041, Invalid=13041, Unknown=0, NotChecked=0, Total=26082 [2018-10-01 00:03:56,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2018-10-01 00:03:56,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 647. [2018-10-01 00:03:56,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 647 states. [2018-10-01 00:03:56,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 647 transitions. [2018-10-01 00:03:56,215 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 647 transitions. Word has length 642 [2018-10-01 00:03:56,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:03:56,215 INFO L480 AbstractCegarLoop]: Abstraction has 647 states and 647 transitions. [2018-10-01 00:03:56,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has 162 states. [2018-10-01 00:03:56,215 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 647 transitions. [2018-10-01 00:03:56,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 647 [2018-10-01 00:03:56,218 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:03:56,218 INFO L375 BasicCegarLoop]: trace histogram [160, 160, 160, 160, 1, 1, 1, 1, 1, 1] [2018-10-01 00:03:56,218 INFO L423 AbstractCegarLoop]: === Iteration 162 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:03:56,219 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:03:56,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1753847092, now seen corresponding path program 160 times [2018-10-01 00:03:56,219 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:03:56,219 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:03:56,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:56,219 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:03:56,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:56,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:06,173 INFO L134 CoverageAnalysis]: Checked inductivity of 51040 backedges. 0 proven. 51040 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:06,174 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:04:06,174 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:04:06,181 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:04:06,317 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:04:06,318 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:04:06,325 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:04:06,612 INFO L134 CoverageAnalysis]: Checked inductivity of 51040 backedges. 0 proven. 51040 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:06,633 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:04:06,634 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [162, 162] total 162 [2018-10-01 00:04:06,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 163 states [2018-10-01 00:04:06,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 163 interpolants. [2018-10-01 00:04:06,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13203, Invalid=13203, Unknown=0, NotChecked=0, Total=26406 [2018-10-01 00:04:06,637 INFO L87 Difference]: Start difference. First operand 647 states and 647 transitions. Second operand 163 states. [2018-10-01 00:04:08,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:04:08,197 INFO L93 Difference]: Finished difference Result 653 states and 653 transitions. [2018-10-01 00:04:08,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2018-10-01 00:04:08,197 INFO L78 Accepts]: Start accepts. Automaton has 163 states. Word has length 646 [2018-10-01 00:04:08,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:04:08,199 INFO L225 Difference]: With dead ends: 653 [2018-10-01 00:04:08,199 INFO L226 Difference]: Without dead ends: 651 [2018-10-01 00:04:08,200 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 807 GetRequests, 646 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=13203, Invalid=13203, Unknown=0, NotChecked=0, Total=26406 [2018-10-01 00:04:08,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2018-10-01 00:04:08,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 651. [2018-10-01 00:04:08,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 651 states. [2018-10-01 00:04:08,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 651 transitions. [2018-10-01 00:04:08,204 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 651 transitions. Word has length 646 [2018-10-01 00:04:08,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:04:08,205 INFO L480 AbstractCegarLoop]: Abstraction has 651 states and 651 transitions. [2018-10-01 00:04:08,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has 163 states. [2018-10-01 00:04:08,205 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 651 transitions. [2018-10-01 00:04:08,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 651 [2018-10-01 00:04:08,207 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:04:08,208 INFO L375 BasicCegarLoop]: trace histogram [161, 161, 161, 161, 1, 1, 1, 1, 1, 1] [2018-10-01 00:04:08,208 INFO L423 AbstractCegarLoop]: === Iteration 163 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:04:08,208 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:04:08,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1346538890, now seen corresponding path program 161 times [2018-10-01 00:04:08,208 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:04:08,208 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:04:08,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:08,209 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:04:08,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:08,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:18,203 INFO L134 CoverageAnalysis]: Checked inductivity of 51681 backedges. 0 proven. 51681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:18,203 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:04:18,203 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:04:18,211 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:04:18,621 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 162 check-sat command(s) [2018-10-01 00:04:18,621 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:04:18,628 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:04:18,934 INFO L134 CoverageAnalysis]: Checked inductivity of 51681 backedges. 0 proven. 51681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:18,954 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:04:18,954 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [163, 163] total 163 [2018-10-01 00:04:18,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 164 states [2018-10-01 00:04:18,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2018-10-01 00:04:18,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13366, Invalid=13366, Unknown=0, NotChecked=0, Total=26732 [2018-10-01 00:04:18,957 INFO L87 Difference]: Start difference. First operand 651 states and 651 transitions. Second operand 164 states. [2018-10-01 00:04:21,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:04:21,364 INFO L93 Difference]: Finished difference Result 657 states and 657 transitions. [2018-10-01 00:04:21,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2018-10-01 00:04:21,365 INFO L78 Accepts]: Start accepts. Automaton has 164 states. Word has length 650 [2018-10-01 00:04:21,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:04:21,366 INFO L225 Difference]: With dead ends: 657 [2018-10-01 00:04:21,366 INFO L226 Difference]: Without dead ends: 655 [2018-10-01 00:04:21,367 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 812 GetRequests, 650 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=13366, Invalid=13366, Unknown=0, NotChecked=0, Total=26732 [2018-10-01 00:04:21,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2018-10-01 00:04:21,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 655. [2018-10-01 00:04:21,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 655 states. [2018-10-01 00:04:21,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 655 transitions. [2018-10-01 00:04:21,371 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 655 transitions. Word has length 650 [2018-10-01 00:04:21,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:04:21,371 INFO L480 AbstractCegarLoop]: Abstraction has 655 states and 655 transitions. [2018-10-01 00:04:21,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has 164 states. [2018-10-01 00:04:21,371 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 655 transitions. [2018-10-01 00:04:21,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 655 [2018-10-01 00:04:21,374 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:04:21,374 INFO L375 BasicCegarLoop]: trace histogram [162, 162, 162, 162, 1, 1, 1, 1, 1, 1] [2018-10-01 00:04:21,374 INFO L423 AbstractCegarLoop]: === Iteration 164 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:04:21,374 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:04:21,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1199270624, now seen corresponding path program 162 times [2018-10-01 00:04:21,374 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:04:21,375 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:04:21,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:21,375 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:04:21,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:21,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:31,485 INFO L134 CoverageAnalysis]: Checked inductivity of 52326 backedges. 0 proven. 52326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:31,485 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:04:31,485 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:04:31,492 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:04:31,874 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 163 check-sat command(s) [2018-10-01 00:04:31,874 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:04:31,882 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:04:32,179 INFO L134 CoverageAnalysis]: Checked inductivity of 52326 backedges. 0 proven. 52326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:32,200 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:04:32,200 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [164, 164] total 164 [2018-10-01 00:04:32,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 165 states [2018-10-01 00:04:32,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 165 interpolants. [2018-10-01 00:04:32,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13530, Invalid=13530, Unknown=0, NotChecked=0, Total=27060 [2018-10-01 00:04:32,203 INFO L87 Difference]: Start difference. First operand 655 states and 655 transitions. Second operand 165 states. [2018-10-01 00:04:33,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:04:33,380 INFO L93 Difference]: Finished difference Result 661 states and 661 transitions. [2018-10-01 00:04:33,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2018-10-01 00:04:33,380 INFO L78 Accepts]: Start accepts. Automaton has 165 states. Word has length 654 [2018-10-01 00:04:33,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:04:33,382 INFO L225 Difference]: With dead ends: 661 [2018-10-01 00:04:33,382 INFO L226 Difference]: Without dead ends: 659 [2018-10-01 00:04:33,383 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 817 GetRequests, 654 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=13530, Invalid=13530, Unknown=0, NotChecked=0, Total=27060 [2018-10-01 00:04:33,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2018-10-01 00:04:33,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 659. [2018-10-01 00:04:33,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 659 states. [2018-10-01 00:04:33,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 659 transitions. [2018-10-01 00:04:33,387 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 659 transitions. Word has length 654 [2018-10-01 00:04:33,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:04:33,387 INFO L480 AbstractCegarLoop]: Abstraction has 659 states and 659 transitions. [2018-10-01 00:04:33,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has 165 states. [2018-10-01 00:04:33,387 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 659 transitions. [2018-10-01 00:04:33,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 659 [2018-10-01 00:04:33,390 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:04:33,390 INFO L375 BasicCegarLoop]: trace histogram [163, 163, 163, 163, 1, 1, 1, 1, 1, 1] [2018-10-01 00:04:33,390 INFO L423 AbstractCegarLoop]: === Iteration 165 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:04:33,390 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:04:33,390 INFO L82 PathProgramCache]: Analyzing trace with hash -297381174, now seen corresponding path program 163 times [2018-10-01 00:04:33,390 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:04:33,391 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:04:33,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:33,391 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:04:33,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:33,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:43,484 INFO L134 CoverageAnalysis]: Checked inductivity of 52975 backedges. 0 proven. 52975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:43,484 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:04:43,484 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:04:43,491 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:04:43,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:43,639 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:04:43,940 INFO L134 CoverageAnalysis]: Checked inductivity of 52975 backedges. 0 proven. 52975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:43,960 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:04:43,961 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [165, 165] total 165 [2018-10-01 00:04:43,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 166 states [2018-10-01 00:04:43,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2018-10-01 00:04:43,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13695, Invalid=13695, Unknown=0, NotChecked=0, Total=27390 [2018-10-01 00:04:43,963 INFO L87 Difference]: Start difference. First operand 659 states and 659 transitions. Second operand 166 states. [2018-10-01 00:04:46,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:04:46,312 INFO L93 Difference]: Finished difference Result 665 states and 665 transitions. [2018-10-01 00:04:46,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2018-10-01 00:04:46,312 INFO L78 Accepts]: Start accepts. Automaton has 166 states. Word has length 658 [2018-10-01 00:04:46,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:04:46,314 INFO L225 Difference]: With dead ends: 665 [2018-10-01 00:04:46,314 INFO L226 Difference]: Without dead ends: 663 [2018-10-01 00:04:46,315 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 822 GetRequests, 658 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=13695, Invalid=13695, Unknown=0, NotChecked=0, Total=27390 [2018-10-01 00:04:46,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2018-10-01 00:04:46,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 663. [2018-10-01 00:04:46,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 663 states. [2018-10-01 00:04:46,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 663 transitions. [2018-10-01 00:04:46,319 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 663 transitions. Word has length 658 [2018-10-01 00:04:46,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:04:46,320 INFO L480 AbstractCegarLoop]: Abstraction has 663 states and 663 transitions. [2018-10-01 00:04:46,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has 166 states. [2018-10-01 00:04:46,320 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 663 transitions. [2018-10-01 00:04:46,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 663 [2018-10-01 00:04:46,322 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:04:46,322 INFO L375 BasicCegarLoop]: trace histogram [164, 164, 164, 164, 1, 1, 1, 1, 1, 1] [2018-10-01 00:04:46,323 INFO L423 AbstractCegarLoop]: === Iteration 166 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:04:46,323 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:04:46,323 INFO L82 PathProgramCache]: Analyzing trace with hash -868406412, now seen corresponding path program 164 times [2018-10-01 00:04:46,323 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:04:46,323 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:04:46,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:46,324 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:04:46,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:46,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:56,600 INFO L134 CoverageAnalysis]: Checked inductivity of 53628 backedges. 0 proven. 53628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:56,600 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:04:56,600 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:04:56,609 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:04:56,736 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:04:56,736 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:04:56,743 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:04:57,066 INFO L134 CoverageAnalysis]: Checked inductivity of 53628 backedges. 0 proven. 53628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:57,086 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:04:57,087 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [166, 166] total 166 [2018-10-01 00:04:57,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 167 states [2018-10-01 00:04:57,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 167 interpolants. [2018-10-01 00:04:57,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13861, Invalid=13861, Unknown=0, NotChecked=0, Total=27722 [2018-10-01 00:04:57,089 INFO L87 Difference]: Start difference. First operand 663 states and 663 transitions. Second operand 167 states. [2018-10-01 00:04:58,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:04:58,515 INFO L93 Difference]: Finished difference Result 669 states and 669 transitions. [2018-10-01 00:04:58,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2018-10-01 00:04:58,516 INFO L78 Accepts]: Start accepts. Automaton has 167 states. Word has length 662 [2018-10-01 00:04:58,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:04:58,517 INFO L225 Difference]: With dead ends: 669 [2018-10-01 00:04:58,518 INFO L226 Difference]: Without dead ends: 667 [2018-10-01 00:04:58,519 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 827 GetRequests, 662 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=13861, Invalid=13861, Unknown=0, NotChecked=0, Total=27722 [2018-10-01 00:04:58,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2018-10-01 00:04:58,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 667. [2018-10-01 00:04:58,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 667 states. [2018-10-01 00:04:58,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 667 transitions. [2018-10-01 00:04:58,524 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 667 transitions. Word has length 662 [2018-10-01 00:04:58,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:04:58,524 INFO L480 AbstractCegarLoop]: Abstraction has 667 states and 667 transitions. [2018-10-01 00:04:58,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has 167 states. [2018-10-01 00:04:58,525 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 667 transitions. [2018-10-01 00:04:58,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 667 [2018-10-01 00:04:58,527 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:04:58,528 INFO L375 BasicCegarLoop]: trace histogram [165, 165, 165, 165, 1, 1, 1, 1, 1, 1] [2018-10-01 00:04:58,528 INFO L423 AbstractCegarLoop]: === Iteration 167 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:04:58,528 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:04:58,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1402757346, now seen corresponding path program 165 times [2018-10-01 00:04:58,528 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:04:58,528 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:04:58,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:58,529 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:04:58,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:58,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:09,001 INFO L134 CoverageAnalysis]: Checked inductivity of 54285 backedges. 0 proven. 54285 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:09,001 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:09,001 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:05:09,008 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:05:09,440 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 166 check-sat command(s) [2018-10-01 00:05:09,440 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:09,447 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:09,778 INFO L134 CoverageAnalysis]: Checked inductivity of 54285 backedges. 0 proven. 54285 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:09,798 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:09,799 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [167, 167] total 167 [2018-10-01 00:05:09,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 168 states [2018-10-01 00:05:09,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 168 interpolants. [2018-10-01 00:05:09,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14028, Invalid=14028, Unknown=0, NotChecked=0, Total=28056 [2018-10-01 00:05:09,801 INFO L87 Difference]: Start difference. First operand 667 states and 667 transitions. Second operand 168 states. [2018-10-01 00:05:12,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:12,435 INFO L93 Difference]: Finished difference Result 673 states and 673 transitions. [2018-10-01 00:05:12,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2018-10-01 00:05:12,435 INFO L78 Accepts]: Start accepts. Automaton has 168 states. Word has length 666 [2018-10-01 00:05:12,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:12,437 INFO L225 Difference]: With dead ends: 673 [2018-10-01 00:05:12,437 INFO L226 Difference]: Without dead ends: 671 [2018-10-01 00:05:12,438 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 832 GetRequests, 666 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=14028, Invalid=14028, Unknown=0, NotChecked=0, Total=28056 [2018-10-01 00:05:12,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2018-10-01 00:05:12,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 671. [2018-10-01 00:05:12,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 671 states. [2018-10-01 00:05:12,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 671 transitions. [2018-10-01 00:05:12,442 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 671 transitions. Word has length 666 [2018-10-01 00:05:12,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:12,442 INFO L480 AbstractCegarLoop]: Abstraction has 671 states and 671 transitions. [2018-10-01 00:05:12,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has 168 states. [2018-10-01 00:05:12,443 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 671 transitions. [2018-10-01 00:05:12,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 671 [2018-10-01 00:05:12,445 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:12,446 INFO L375 BasicCegarLoop]: trace histogram [166, 166, 166, 166, 1, 1, 1, 1, 1, 1] [2018-10-01 00:05:12,446 INFO L423 AbstractCegarLoop]: === Iteration 168 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:12,446 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:12,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1735667144, now seen corresponding path program 166 times [2018-10-01 00:05:12,446 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:12,446 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:12,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:12,447 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:12,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:12,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:23,031 INFO L134 CoverageAnalysis]: Checked inductivity of 54946 backedges. 0 proven. 54946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:23,031 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:23,031 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:05:23,039 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:05:23,179 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:05:23,179 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:23,186 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:23,525 INFO L134 CoverageAnalysis]: Checked inductivity of 54946 backedges. 0 proven. 54946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:23,546 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:23,546 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [168, 168] total 168 [2018-10-01 00:05:23,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 169 states [2018-10-01 00:05:23,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 169 interpolants. [2018-10-01 00:05:23,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14196, Invalid=14196, Unknown=0, NotChecked=0, Total=28392 [2018-10-01 00:05:23,549 INFO L87 Difference]: Start difference. First operand 671 states and 671 transitions. Second operand 169 states. [2018-10-01 00:05:25,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:25,158 INFO L93 Difference]: Finished difference Result 677 states and 677 transitions. [2018-10-01 00:05:25,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2018-10-01 00:05:25,159 INFO L78 Accepts]: Start accepts. Automaton has 169 states. Word has length 670 [2018-10-01 00:05:25,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:25,160 INFO L225 Difference]: With dead ends: 677 [2018-10-01 00:05:25,160 INFO L226 Difference]: Without dead ends: 675 [2018-10-01 00:05:25,162 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 837 GetRequests, 670 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=14196, Invalid=14196, Unknown=0, NotChecked=0, Total=28392 [2018-10-01 00:05:25,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2018-10-01 00:05:25,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 675. [2018-10-01 00:05:25,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 675 states. [2018-10-01 00:05:25,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 675 transitions. [2018-10-01 00:05:25,167 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 675 transitions. Word has length 670 [2018-10-01 00:05:25,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:25,167 INFO L480 AbstractCegarLoop]: Abstraction has 675 states and 675 transitions. [2018-10-01 00:05:25,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has 169 states. [2018-10-01 00:05:25,167 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 675 transitions. [2018-10-01 00:05:25,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 675 [2018-10-01 00:05:25,170 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:25,170 INFO L375 BasicCegarLoop]: trace histogram [167, 167, 167, 167, 1, 1, 1, 1, 1, 1] [2018-10-01 00:05:25,170 INFO L423 AbstractCegarLoop]: === Iteration 169 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:25,171 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:25,171 INFO L82 PathProgramCache]: Analyzing trace with hash -186034318, now seen corresponding path program 167 times [2018-10-01 00:05:25,171 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:25,171 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:25,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:25,172 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:25,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:25,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-10-01 00:05:25,731 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-01 00:05:25,735 WARN L206 ceAbstractionStarter]: Timeout [2018-10-01 00:05:25,736 INFO L202 PluginConnector]: Adding new model Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.10 12:05:25 BoogieIcfgContainer [2018-10-01 00:05:25,736 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-01 00:05:25,736 INFO L168 Benchmark]: Toolchain (without parser) took 764317.83 ms. Allocated memory was 1.5 GB in the beginning and 2.0 GB in the end (delta: 481.8 MB). Free memory was 1.4 GB in the beginning and 1.0 GB in the end (delta: 424.4 MB). Peak memory consumption was 906.2 MB. Max. memory is 7.1 GB. [2018-10-01 00:05:25,738 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. [2018-10-01 00:05:25,738 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.50 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. [2018-10-01 00:05:25,739 INFO L168 Benchmark]: Boogie Preprocessor took 22.99 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. [2018-10-01 00:05:25,739 INFO L168 Benchmark]: RCFGBuilder took 490.94 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. [2018-10-01 00:05:25,739 INFO L168 Benchmark]: TraceAbstraction took 763754.71 ms. Allocated memory was 1.5 GB in the beginning and 2.0 GB in the end (delta: 481.8 MB). Free memory was 1.4 GB in the beginning and 1.0 GB in the end (delta: 403.2 MB). Peak memory consumption was 885.1 MB. Max. memory is 7.1 GB. [2018-10-01 00:05:25,741 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 43.50 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 22.99 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 490.94 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 763754.71 ms. Allocated memory was 1.5 GB in the beginning and 2.0 GB in the end (delta: 481.8 MB). Free memory was 1.4 GB in the beginning and 1.0 GB in the end (delta: 403.2 MB). Peak memory consumption was 885.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 41]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 41). Cancelled while BasicCegarLoop was analyzing trace of length 675 with TraceHistMax 167, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 15 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. TIMEOUT Result, 763.6s OverallTime, 169 OverallIterations, 167 TraceHistogramMax, 89.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1512 SDtfs, 1209 SDslu, 47818 SDs, 0 SdLazy, 19933 SolverSat, 402 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 28.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 70471 GetRequests, 56442 SyntacticMatches, 0 SemanticMatches, 14029 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 596.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=675occurred in iteration=168, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 168 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.8s SsaConstructionTime, 23.9s SatisfiabilityAnalysisTime, 623.9s InterpolantComputationTime, 112892 NumberOfCodeBlocks, 112892 NumberOfCodeBlocksAsserted, 7251 NumberOfCheckSat, 112558 ConstructedInterpolants, 0 QuantifiedInterpolants, 150829370 SizeOfPredicates, 166 NumberOfNonLiveVariables, 85158 ConjunctsInSsa, 14193 ConjunctsInUnsatCore, 334 InterpolantComputations, 2 PerfectInterpolantSequences, 0/6126562 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/Luxembourg-ArraysIntegefied.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-01_00-05-25-749.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Luxembourg-ArraysIntegefied.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-01_00-05-25-749.csv Completed graceful shutdown