java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-133090d [2018-10-04 09:12:19,295 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-04 09:12:19,297 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-04 09:12:19,314 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-04 09:12:19,314 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-04 09:12:19,315 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-04 09:12:19,318 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-04 09:12:19,320 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-04 09:12:19,322 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-04 09:12:19,325 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-04 09:12:19,326 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-04 09:12:19,326 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-04 09:12:19,328 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-04 09:12:19,329 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-04 09:12:19,337 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-04 09:12:19,338 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-04 09:12:19,339 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-04 09:12:19,342 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-04 09:12:19,345 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-04 09:12:19,347 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-04 09:12:19,348 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-04 09:12:19,350 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-04 09:12:19,353 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-04 09:12:19,353 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-04 09:12:19,354 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-04 09:12:19,358 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-04 09:12:19,360 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-04 09:12:19,360 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-04 09:12:19,361 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-04 09:12:19,364 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-04 09:12:19,365 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-04 09:12:19,365 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-04 09:12:19,366 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-04 09:12:19,366 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-04 09:12:19,367 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-04 09:12:19,368 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-04 09:12:19,369 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 [2018-10-04 09:12:19,389 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-04 09:12:19,389 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-04 09:12:19,390 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-04 09:12:19,390 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-04 09:12:19,391 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-04 09:12:19,391 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-04 09:12:19,391 INFO L133 SettingsManager]: * Use SBE=true [2018-10-04 09:12:19,391 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-04 09:12:19,392 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-04 09:12:19,392 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-04 09:12:19,392 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-04 09:12:19,392 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-04 09:12:19,392 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-04 09:12:19,392 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-04 09:12:19,393 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-04 09:12:19,393 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-04 09:12:19,393 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-04 09:12:19,393 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-04 09:12:19,394 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-04 09:12:19,394 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-04 09:12:19,394 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-04 09:12:19,394 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-04 09:12:19,394 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 09:12:19,395 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-04 09:12:19,395 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-04 09:12:19,395 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-04 09:12:19,395 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-04 09:12:19,395 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-04 09:12:19,396 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-04 09:12:19,396 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-04 09:12:19,448 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-04 09:12:19,463 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-04 09:12:19,467 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-04 09:12:19,469 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-04 09:12:19,470 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-04 09:12:19,471 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl [2018-10-04 09:12:19,471 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl' [2018-10-04 09:12:19,544 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-04 09:12:19,546 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-04 09:12:19,546 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-04 09:12:19,547 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-04 09:12:19,547 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-04 09:12:19,568 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:12:19" (1/1) ... [2018-10-04 09:12:19,578 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:12:19" (1/1) ... [2018-10-04 09:12:19,584 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-04 09:12:19,585 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-04 09:12:19,585 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-04 09:12:19,585 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-04 09:12:19,596 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:12:19" (1/1) ... [2018-10-04 09:12:19,597 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:12:19" (1/1) ... [2018-10-04 09:12:19,598 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:12:19" (1/1) ... [2018-10-04 09:12:19,598 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:12:19" (1/1) ... [2018-10-04 09:12:19,601 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:12:19" (1/1) ... [2018-10-04 09:12:19,603 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:12:19" (1/1) ... [2018-10-04 09:12:19,604 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:12:19" (1/1) ... [2018-10-04 09:12:19,606 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-04 09:12:19,606 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-04 09:12:19,607 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-04 09:12:19,607 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-04 09:12:19,608 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:12:19" (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 [2018-10-04 09:12:19,668 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-10-04 09:12:19,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-04 09:12:19,668 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-04 09:12:19,861 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-04 09:12:19,862 INFO L202 PluginConnector]: Adding new model fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 09:12:19 BoogieIcfgContainer [2018-10-04 09:12:19,862 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-04 09:12:19,863 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-04 09:12:19,863 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-04 09:12:19,866 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-04 09:12:19,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:12:19" (1/2) ... [2018-10-04 09:12:19,868 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59660566 and model type fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 09:12:19, skipping insertion in model container [2018-10-04 09:12:19,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 09:12:19" (2/2) ... [2018-10-04 09:12:19,870 INFO L112 eAbstractionObserver]: Analyzing ICFG fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl [2018-10-04 09:12:19,880 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-04 09:12:19,888 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-04 09:12:19,936 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-04 09:12:19,937 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-04 09:12:19,937 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-04 09:12:19,937 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-04 09:12:19,937 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-04 09:12:19,937 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-04 09:12:19,938 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-04 09:12:19,938 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-04 09:12:19,938 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-04 09:12:19,952 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2018-10-04 09:12:19,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-04 09:12:19,959 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:19,960 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-10-04 09:12:19,961 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:19,967 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:19,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1807861163, now seen corresponding path program 1 times [2018-10-04 09:12:19,970 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:19,971 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:20,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:20,019 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:12:20,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:20,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:20,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:20,140 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 09:12:20,140 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-04 09:12:20,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-04 09:12:20,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-04 09:12:20,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-04 09:12:20,158 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2018-10-04 09:12:20,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:20,218 INFO L93 Difference]: Finished difference Result 17 states and 22 transitions. [2018-10-04 09:12:20,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-04 09:12:20,220 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-10-04 09:12:20,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:20,230 INFO L225 Difference]: With dead ends: 17 [2018-10-04 09:12:20,231 INFO L226 Difference]: Without dead ends: 10 [2018-10-04 09:12:20,234 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 [2018-10-04 09:12:20,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-04 09:12:20,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-04 09:12:20,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-04 09:12:20,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2018-10-04 09:12:20,270 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2018-10-04 09:12:20,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:20,270 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2018-10-04 09:12:20,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-04 09:12:20,271 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2018-10-04 09:12:20,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-04 09:12:20,271 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:20,271 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-10-04 09:12:20,272 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:20,272 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:20,272 INFO L82 PathProgramCache]: Analyzing trace with hash 89245487, now seen corresponding path program 1 times [2018-10-04 09:12:20,272 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:20,273 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:20,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:20,274 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:12:20,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:20,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:20,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:20,436 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:20,436 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 [2018-10-04 09:12:20,464 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:12:20,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:20,507 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:20,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:20,555 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:20,555 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-04 09:12:20,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-04 09:12:20,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-04 09:12:20,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-04 09:12:20,557 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand 4 states. [2018-10-04 09:12:20,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:20,600 INFO L93 Difference]: Finished difference Result 17 states and 21 transitions. [2018-10-04 09:12:20,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-04 09:12:20,602 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2018-10-04 09:12:20,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:20,603 INFO L225 Difference]: With dead ends: 17 [2018-10-04 09:12:20,603 INFO L226 Difference]: Without dead ends: 12 [2018-10-04 09:12:20,606 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-04 09:12:20,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-04 09:12:20,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-04 09:12:20,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-04 09:12:20,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2018-10-04 09:12:20,610 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2018-10-04 09:12:20,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:20,610 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2018-10-04 09:12:20,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-04 09:12:20,610 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2018-10-04 09:12:20,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-04 09:12:20,611 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:20,611 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2018-10-04 09:12:20,612 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:20,612 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:20,612 INFO L82 PathProgramCache]: Analyzing trace with hash 2061989811, now seen corresponding path program 2 times [2018-10-04 09:12:20,612 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:20,612 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:20,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:20,614 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:12:20,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:20,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:20,729 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:20,729 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 09:12:20,730 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-04 09:12:20,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-04 09:12:20,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-04 09:12:20,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-04 09:12:20,731 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 5 states. [2018-10-04 09:12:20,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:20,790 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2018-10-04 09:12:20,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 09:12:20,791 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-10-04 09:12:20,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:20,792 INFO L225 Difference]: With dead ends: 32 [2018-10-04 09:12:20,792 INFO L226 Difference]: Without dead ends: 27 [2018-10-04 09:12:20,793 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-04 09:12:20,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-04 09:12:20,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2018-10-04 09:12:20,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-04 09:12:20,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2018-10-04 09:12:20,800 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 11 [2018-10-04 09:12:20,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:20,801 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2018-10-04 09:12:20,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-04 09:12:20,801 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2018-10-04 09:12:20,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-04 09:12:20,802 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:20,802 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2018-10-04 09:12:20,802 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:20,802 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:20,803 INFO L82 PathProgramCache]: Analyzing trace with hash 2062049393, now seen corresponding path program 1 times [2018-10-04 09:12:20,803 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:20,803 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:20,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:20,804 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:20,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:20,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:20,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-10-04 09:12:20,865 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 09:12:20,866 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-04 09:12:20,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-04 09:12:20,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-04 09:12:20,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-04 09:12:20,868 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 4 states. [2018-10-04 09:12:21,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:21,007 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2018-10-04 09:12:21,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 09:12:21,009 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2018-10-04 09:12:21,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:21,010 INFO L225 Difference]: With dead ends: 26 [2018-10-04 09:12:21,010 INFO L226 Difference]: Without dead ends: 24 [2018-10-04 09:12:21,011 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-04 09:12:21,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-04 09:12:21,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2018-10-04 09:12:21,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-04 09:12:21,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2018-10-04 09:12:21,017 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 11 [2018-10-04 09:12:21,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:21,018 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2018-10-04 09:12:21,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-04 09:12:21,018 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2018-10-04 09:12:21,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-04 09:12:21,019 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:21,019 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1] [2018-10-04 09:12:21,020 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:21,020 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:21,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1980186676, now seen corresponding path program 1 times [2018-10-04 09:12:21,020 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:21,021 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:21,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:21,022 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:12:21,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:21,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:21,249 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:21,250 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:21,250 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 [2018-10-04 09:12:21,265 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:12:21,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:21,299 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:21,311 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:21,342 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:21,342 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-04 09:12:21,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-04 09:12:21,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-04 09:12:21,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-04 09:12:21,344 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 5 states. [2018-10-04 09:12:21,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:21,423 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2018-10-04 09:12:21,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 09:12:21,425 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2018-10-04 09:12:21,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:21,426 INFO L225 Difference]: With dead ends: 37 [2018-10-04 09:12:21,426 INFO L226 Difference]: Without dead ends: 23 [2018-10-04 09:12:21,427 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-04 09:12:21,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-04 09:12:21,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-04 09:12:21,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-04 09:12:21,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2018-10-04 09:12:21,435 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 20 [2018-10-04 09:12:21,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:21,435 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2018-10-04 09:12:21,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-04 09:12:21,436 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2018-10-04 09:12:21,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-04 09:12:21,438 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:21,438 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:12:21,439 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:21,439 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:21,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1317950664, now seen corresponding path program 2 times [2018-10-04 09:12:21,439 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:21,441 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:21,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:21,442 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:12:21,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:21,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:21,564 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:21,565 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:21,565 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 [2018-10-04 09:12:21,576 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:12:21,611 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:12:21,611 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:21,615 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:21,621 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:21,641 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:21,642 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-04 09:12:21,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-04 09:12:21,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-04 09:12:21,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-04 09:12:21,643 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 6 states. [2018-10-04 09:12:21,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:21,738 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2018-10-04 09:12:21,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 09:12:21,738 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2018-10-04 09:12:21,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:21,739 INFO L225 Difference]: With dead ends: 39 [2018-10-04 09:12:21,739 INFO L226 Difference]: Without dead ends: 25 [2018-10-04 09:12:21,740 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-04 09:12:21,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-04 09:12:21,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-04 09:12:21,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-04 09:12:21,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2018-10-04 09:12:21,746 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 22 [2018-10-04 09:12:21,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:21,746 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2018-10-04 09:12:21,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-04 09:12:21,747 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2018-10-04 09:12:21,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-04 09:12:21,748 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:21,748 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:12:21,748 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:21,748 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:21,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1142069956, now seen corresponding path program 3 times [2018-10-04 09:12:21,749 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:21,749 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:21,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:21,750 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:21,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:21,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:21,866 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:21,866 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:21,866 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 [2018-10-04 09:12:21,878 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:12:21,900 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-10-04 09:12:21,901 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:21,904 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:21,911 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:21,934 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:21,934 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-04 09:12:21,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-04 09:12:21,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-04 09:12:21,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-04 09:12:21,935 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 7 states. [2018-10-04 09:12:21,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:21,978 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2018-10-04 09:12:21,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 09:12:21,988 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2018-10-04 09:12:21,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:21,989 INFO L225 Difference]: With dead ends: 41 [2018-10-04 09:12:21,989 INFO L226 Difference]: Without dead ends: 27 [2018-10-04 09:12:21,990 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-04 09:12:21,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-04 09:12:21,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-04 09:12:21,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-04 09:12:21,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2018-10-04 09:12:21,996 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 24 [2018-10-04 09:12:21,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:21,996 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2018-10-04 09:12:21,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-04 09:12:21,996 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2018-10-04 09:12:21,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-04 09:12:21,997 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:21,997 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:12:21,998 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:21,998 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:21,998 INFO L82 PathProgramCache]: Analyzing trace with hash -375565888, now seen corresponding path program 4 times [2018-10-04 09:12:21,998 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:21,998 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:21,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:22,000 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:22,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:22,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:22,114 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:22,114 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:22,115 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 [2018-10-04 09:12:22,129 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:12:22,155 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:12:22,156 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:22,158 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:22,165 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:22,186 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:22,187 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 09:12:22,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 09:12:22,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 09:12:22,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:12:22,188 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 8 states. [2018-10-04 09:12:22,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:22,307 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2018-10-04 09:12:22,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 09:12:22,308 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2018-10-04 09:12:22,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:22,310 INFO L225 Difference]: With dead ends: 43 [2018-10-04 09:12:22,310 INFO L226 Difference]: Without dead ends: 29 [2018-10-04 09:12:22,311 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:12:22,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-04 09:12:22,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-04 09:12:22,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-04 09:12:22,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2018-10-04 09:12:22,317 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 26 [2018-10-04 09:12:22,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:22,318 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2018-10-04 09:12:22,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 09:12:22,318 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2018-10-04 09:12:22,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-04 09:12:22,319 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:22,319 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:12:22,320 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:22,320 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:22,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1465268668, now seen corresponding path program 5 times [2018-10-04 09:12:22,320 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:22,321 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:22,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:22,322 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:22,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:22,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:22,693 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:22,694 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:22,694 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 [2018-10-04 09:12:22,702 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:12:22,761 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-04 09:12:22,761 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:22,764 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:22,772 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:22,804 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:22,804 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:12:22,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:12:22,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:12:22,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:12:22,805 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 9 states. [2018-10-04 09:12:22,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:22,865 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2018-10-04 09:12:22,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:12:22,867 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2018-10-04 09:12:22,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:22,868 INFO L225 Difference]: With dead ends: 45 [2018-10-04 09:12:22,868 INFO L226 Difference]: Without dead ends: 31 [2018-10-04 09:12:22,869 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:12:22,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-04 09:12:22,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-04 09:12:22,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-04 09:12:22,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2018-10-04 09:12:22,874 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 28 [2018-10-04 09:12:22,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:22,875 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2018-10-04 09:12:22,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:12:22,875 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2018-10-04 09:12:22,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-04 09:12:22,876 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:22,876 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:12:22,876 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:22,876 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:22,877 INFO L82 PathProgramCache]: Analyzing trace with hash 980751032, now seen corresponding path program 6 times [2018-10-04 09:12:22,877 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:22,877 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:22,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:22,878 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:22,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:22,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:23,180 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:23,180 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:23,181 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:12:23,189 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:12:23,324 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-04 09:12:23,324 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:23,327 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:23,344 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:23,385 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:23,385 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:12:23,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:12:23,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:12:23,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:12:23,387 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 10 states. [2018-10-04 09:12:23,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:23,675 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2018-10-04 09:12:23,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:12:23,680 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2018-10-04 09:12:23,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:23,681 INFO L225 Difference]: With dead ends: 47 [2018-10-04 09:12:23,681 INFO L226 Difference]: Without dead ends: 33 [2018-10-04 09:12:23,682 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:12:23,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-04 09:12:23,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-04 09:12:23,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-04 09:12:23,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2018-10-04 09:12:23,692 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 30 [2018-10-04 09:12:23,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:23,693 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2018-10-04 09:12:23,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:12:23,693 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2018-10-04 09:12:23,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-04 09:12:23,694 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:23,695 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:12:23,695 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:23,695 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:23,695 INFO L82 PathProgramCache]: Analyzing trace with hash -784229196, now seen corresponding path program 7 times [2018-10-04 09:12:23,695 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:23,696 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:23,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:23,699 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:23,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:23,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:23,916 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:23,917 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:23,917 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 [2018-10-04 09:12:23,925 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:12:23,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:23,967 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:23,976 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:23,999 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:23,999 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:12:24,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:12:24,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:12:24,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:12:24,000 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 11 states. [2018-10-04 09:12:24,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:24,121 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2018-10-04 09:12:24,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:12:24,126 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2018-10-04 09:12:24,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:24,127 INFO L225 Difference]: With dead ends: 49 [2018-10-04 09:12:24,127 INFO L226 Difference]: Without dead ends: 35 [2018-10-04 09:12:24,128 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:12:24,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-04 09:12:24,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-04 09:12:24,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-04 09:12:24,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2018-10-04 09:12:24,134 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 32 [2018-10-04 09:12:24,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:24,134 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2018-10-04 09:12:24,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:12:24,135 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2018-10-04 09:12:24,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-04 09:12:24,135 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:24,136 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:12:24,136 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:24,136 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:24,136 INFO L82 PathProgramCache]: Analyzing trace with hash -418146384, now seen corresponding path program 8 times [2018-10-04 09:12:24,136 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:24,136 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:24,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:24,137 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:12:24,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:24,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:24,394 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:24,395 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:24,395 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:12:24,406 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:12:24,445 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:12:24,445 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:24,447 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:24,457 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:24,480 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:24,481 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-04 09:12:24,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-04 09:12:24,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-04 09:12:24,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-04 09:12:24,482 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 12 states. [2018-10-04 09:12:24,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:24,782 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2018-10-04 09:12:24,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-04 09:12:24,782 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2018-10-04 09:12:24,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:24,783 INFO L225 Difference]: With dead ends: 51 [2018-10-04 09:12:24,783 INFO L226 Difference]: Without dead ends: 37 [2018-10-04 09:12:24,784 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-04 09:12:24,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-04 09:12:24,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-04 09:12:24,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-04 09:12:24,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2018-10-04 09:12:24,795 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 34 [2018-10-04 09:12:24,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:24,795 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2018-10-04 09:12:24,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-04 09:12:24,799 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2018-10-04 09:12:24,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-04 09:12:24,800 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:24,801 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:12:24,801 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:24,801 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:24,801 INFO L82 PathProgramCache]: Analyzing trace with hash -799882324, now seen corresponding path program 9 times [2018-10-04 09:12:24,802 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:24,804 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:24,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:24,805 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:24,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:24,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:25,364 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:25,364 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:25,364 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:12:25,372 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:12:25,413 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-10-04 09:12:25,413 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:25,418 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:25,428 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:25,455 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:25,455 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-04 09:12:25,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-04 09:12:25,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-04 09:12:25,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-04 09:12:25,456 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 13 states. [2018-10-04 09:12:25,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:25,566 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2018-10-04 09:12:25,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-04 09:12:25,569 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2018-10-04 09:12:25,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:25,569 INFO L225 Difference]: With dead ends: 53 [2018-10-04 09:12:25,570 INFO L226 Difference]: Without dead ends: 39 [2018-10-04 09:12:25,570 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-04 09:12:25,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-04 09:12:25,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-04 09:12:25,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-04 09:12:25,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2018-10-04 09:12:25,577 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 36 [2018-10-04 09:12:25,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:25,577 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2018-10-04 09:12:25,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-04 09:12:25,577 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2018-10-04 09:12:25,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-04 09:12:25,578 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:25,578 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:12:25,579 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:25,579 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:25,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1719066792, now seen corresponding path program 10 times [2018-10-04 09:12:25,579 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:25,579 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:25,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:25,580 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:25,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:25,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:25,747 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:25,748 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:25,748 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 [2018-10-04 09:12:25,757 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:12:25,803 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:12:25,803 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:25,806 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:25,817 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:25,847 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:25,848 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-04 09:12:25,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 09:12:25,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 09:12:25,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-04 09:12:25,849 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 14 states. [2018-10-04 09:12:25,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:25,923 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2018-10-04 09:12:25,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-04 09:12:25,923 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2018-10-04 09:12:25,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:25,924 INFO L225 Difference]: With dead ends: 55 [2018-10-04 09:12:25,924 INFO L226 Difference]: Without dead ends: 41 [2018-10-04 09:12:25,924 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-04 09:12:25,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-04 09:12:25,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-04 09:12:25,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-04 09:12:25,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2018-10-04 09:12:25,931 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 38 [2018-10-04 09:12:25,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:25,932 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2018-10-04 09:12:25,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 09:12:25,932 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2018-10-04 09:12:25,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-04 09:12:25,933 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:25,933 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:12:25,933 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:25,934 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:25,934 INFO L82 PathProgramCache]: Analyzing trace with hash 67612324, now seen corresponding path program 11 times [2018-10-04 09:12:25,934 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:25,934 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:25,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:25,935 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:25,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:25,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:26,110 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:26,111 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:26,111 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:12:26,122 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:12:26,173 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-04 09:12:26,174 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:26,177 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:26,196 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:26,222 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:26,223 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-04 09:12:26,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-04 09:12:26,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-04 09:12:26,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-04 09:12:26,224 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 15 states. [2018-10-04 09:12:26,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:26,279 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2018-10-04 09:12:26,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-04 09:12:26,280 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2018-10-04 09:12:26,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:26,281 INFO L225 Difference]: With dead ends: 57 [2018-10-04 09:12:26,281 INFO L226 Difference]: Without dead ends: 43 [2018-10-04 09:12:26,281 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-04 09:12:26,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-04 09:12:26,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-04 09:12:26,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-04 09:12:26,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2018-10-04 09:12:26,289 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 40 [2018-10-04 09:12:26,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:26,289 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2018-10-04 09:12:26,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-04 09:12:26,290 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2018-10-04 09:12:26,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-04 09:12:26,290 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:26,291 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:12:26,291 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:26,291 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:26,291 INFO L82 PathProgramCache]: Analyzing trace with hash -2137199200, now seen corresponding path program 12 times [2018-10-04 09:12:26,292 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:26,292 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:26,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:26,293 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:26,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:26,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:26,637 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:26,637 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:26,638 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 [2018-10-04 09:12:26,646 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:12:26,742 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-10-04 09:12:26,742 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:26,745 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:26,758 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:26,790 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:26,790 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-04 09:12:26,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-04 09:12:26,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-04 09:12:26,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-04 09:12:26,792 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 16 states. [2018-10-04 09:12:26,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:26,873 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2018-10-04 09:12:26,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-04 09:12:26,873 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2018-10-04 09:12:26,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:26,874 INFO L225 Difference]: With dead ends: 59 [2018-10-04 09:12:26,874 INFO L226 Difference]: Without dead ends: 45 [2018-10-04 09:12:26,875 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-04 09:12:26,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-04 09:12:26,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-04 09:12:26,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-04 09:12:26,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2018-10-04 09:12:26,881 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 42 [2018-10-04 09:12:26,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:26,882 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2018-10-04 09:12:26,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-04 09:12:26,882 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2018-10-04 09:12:26,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-04 09:12:26,883 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:26,883 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:12:26,883 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:26,883 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:26,884 INFO L82 PathProgramCache]: Analyzing trace with hash 752770460, now seen corresponding path program 13 times [2018-10-04 09:12:26,884 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:26,884 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:26,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:26,885 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:26,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:26,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:27,284 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:27,284 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:27,284 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:12:27,293 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:12:27,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:27,337 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:27,355 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:27,390 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:27,390 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-04 09:12:27,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-04 09:12:27,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-04 09:12:27,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-04 09:12:27,391 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 17 states. [2018-10-04 09:12:27,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:27,542 INFO L93 Difference]: Finished difference Result 61 states and 65 transitions. [2018-10-04 09:12:27,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-04 09:12:27,543 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2018-10-04 09:12:27,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:27,544 INFO L225 Difference]: With dead ends: 61 [2018-10-04 09:12:27,544 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 09:12:27,544 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-04 09:12:27,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 09:12:27,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-04 09:12:27,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-04 09:12:27,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2018-10-04 09:12:27,551 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 44 [2018-10-04 09:12:27,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:27,552 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2018-10-04 09:12:27,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-04 09:12:27,552 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2018-10-04 09:12:27,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-04 09:12:27,553 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:27,553 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:12:27,553 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:27,554 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:27,554 INFO L82 PathProgramCache]: Analyzing trace with hash -830226792, now seen corresponding path program 14 times [2018-10-04 09:12:27,554 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:27,554 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:27,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:27,555 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:12:27,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:27,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:28,044 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:28,045 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:28,045 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:12:28,053 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:12:28,107 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:12:28,107 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:28,110 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:28,136 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:28,167 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:28,167 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-04 09:12:28,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-04 09:12:28,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-04 09:12:28,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-04 09:12:28,169 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 18 states. [2018-10-04 09:12:28,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:28,269 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2018-10-04 09:12:28,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-04 09:12:28,270 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 46 [2018-10-04 09:12:28,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:28,270 INFO L225 Difference]: With dead ends: 63 [2018-10-04 09:12:28,270 INFO L226 Difference]: Without dead ends: 49 [2018-10-04 09:12:28,271 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-04 09:12:28,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-04 09:12:28,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-04 09:12:28,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-04 09:12:28,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2018-10-04 09:12:28,277 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 46 [2018-10-04 09:12:28,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:28,277 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2018-10-04 09:12:28,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-04 09:12:28,277 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2018-10-04 09:12:28,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-04 09:12:28,278 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:28,278 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:12:28,278 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:28,278 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:28,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1672163180, now seen corresponding path program 15 times [2018-10-04 09:12:28,279 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:28,279 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:28,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:28,280 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:28,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:28,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:28,597 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:28,597 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:28,597 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 [2018-10-04 09:12:28,605 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:12:28,777 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2018-10-04 09:12:28,777 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:28,779 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:28,790 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:28,821 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:28,821 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-04 09:12:28,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-04 09:12:28,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-04 09:12:28,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-04 09:12:28,822 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 19 states. [2018-10-04 09:12:28,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:28,950 INFO L93 Difference]: Finished difference Result 65 states and 69 transitions. [2018-10-04 09:12:28,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-04 09:12:28,951 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 48 [2018-10-04 09:12:28,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:28,952 INFO L225 Difference]: With dead ends: 65 [2018-10-04 09:12:28,952 INFO L226 Difference]: Without dead ends: 51 [2018-10-04 09:12:28,953 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-04 09:12:28,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-04 09:12:28,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-04 09:12:28,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-04 09:12:28,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2018-10-04 09:12:28,959 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 48 [2018-10-04 09:12:28,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:28,960 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2018-10-04 09:12:28,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-04 09:12:28,960 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2018-10-04 09:12:28,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-04 09:12:28,961 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:28,961 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:12:28,961 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:28,961 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:28,962 INFO L82 PathProgramCache]: Analyzing trace with hash 975786896, now seen corresponding path program 16 times [2018-10-04 09:12:28,962 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:28,962 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:28,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:28,963 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:28,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:28,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:29,349 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:29,350 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:29,350 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 [2018-10-04 09:12:29,358 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:12:29,395 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:12:29,395 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:29,397 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:29,408 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:29,439 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:29,439 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-04 09:12:29,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 09:12:29,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 09:12:29,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-04 09:12:29,441 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 20 states. [2018-10-04 09:12:29,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:29,538 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2018-10-04 09:12:29,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-04 09:12:29,539 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 50 [2018-10-04 09:12:29,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:29,539 INFO L225 Difference]: With dead ends: 67 [2018-10-04 09:12:29,539 INFO L226 Difference]: Without dead ends: 53 [2018-10-04 09:12:29,541 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-04 09:12:29,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-04 09:12:29,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-04 09:12:29,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-04 09:12:29,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2018-10-04 09:12:29,548 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 50 [2018-10-04 09:12:29,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:29,549 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2018-10-04 09:12:29,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 09:12:29,549 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2018-10-04 09:12:29,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-04 09:12:29,549 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:29,550 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:12:29,550 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:29,550 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:29,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1259796596, now seen corresponding path program 17 times [2018-10-04 09:12:29,550 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:29,551 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:29,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:29,551 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:29,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:29,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:29,795 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:29,796 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:29,796 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 [2018-10-04 09:12:29,809 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:12:29,857 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-04 09:12:29,857 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:29,859 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:29,871 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:29,899 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:29,900 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-04 09:12:29,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-04 09:12:29,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-04 09:12:29,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-04 09:12:29,901 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 21 states. [2018-10-04 09:12:29,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:29,962 INFO L93 Difference]: Finished difference Result 69 states and 73 transitions. [2018-10-04 09:12:29,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-04 09:12:29,962 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 52 [2018-10-04 09:12:29,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:29,963 INFO L225 Difference]: With dead ends: 69 [2018-10-04 09:12:29,963 INFO L226 Difference]: Without dead ends: 55 [2018-10-04 09:12:29,964 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-04 09:12:29,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-04 09:12:29,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-10-04 09:12:29,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-04 09:12:29,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2018-10-04 09:12:29,971 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 52 [2018-10-04 09:12:29,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:29,971 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2018-10-04 09:12:29,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-04 09:12:29,971 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2018-10-04 09:12:29,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-04 09:12:29,972 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:29,972 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:12:29,972 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:29,972 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:29,973 INFO L82 PathProgramCache]: Analyzing trace with hash 2123082888, now seen corresponding path program 18 times [2018-10-04 09:12:29,973 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:29,973 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:29,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:29,974 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:29,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:29,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:30,917 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:30,918 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:30,918 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:12:30,925 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:12:30,979 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-10-04 09:12:30,979 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:30,981 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:30,993 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:31,025 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:31,025 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-04 09:12:31,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-04 09:12:31,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-04 09:12:31,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-04 09:12:31,027 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 22 states. [2018-10-04 09:12:31,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:31,140 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2018-10-04 09:12:31,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-04 09:12:31,143 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 54 [2018-10-04 09:12:31,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:31,144 INFO L225 Difference]: With dead ends: 71 [2018-10-04 09:12:31,144 INFO L226 Difference]: Without dead ends: 57 [2018-10-04 09:12:31,145 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-04 09:12:31,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-04 09:12:31,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-04 09:12:31,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-04 09:12:31,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2018-10-04 09:12:31,155 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 54 [2018-10-04 09:12:31,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:31,159 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2018-10-04 09:12:31,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-04 09:12:31,159 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2018-10-04 09:12:31,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-04 09:12:31,160 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:31,160 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:12:31,160 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:31,160 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:31,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1780023940, now seen corresponding path program 19 times [2018-10-04 09:12:31,161 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:31,161 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:31,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:31,162 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:31,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:31,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:31,884 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:31,884 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:31,884 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:12:31,892 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:12:31,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:31,952 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:31,967 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:31,992 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:31,992 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-04 09:12:31,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-04 09:12:31,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-04 09:12:31,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-04 09:12:31,994 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 23 states. [2018-10-04 09:12:32,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:32,136 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2018-10-04 09:12:32,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-04 09:12:32,137 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 56 [2018-10-04 09:12:32,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:32,138 INFO L225 Difference]: With dead ends: 73 [2018-10-04 09:12:32,138 INFO L226 Difference]: Without dead ends: 59 [2018-10-04 09:12:32,138 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-04 09:12:32,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-04 09:12:32,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-04 09:12:32,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-04 09:12:32,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2018-10-04 09:12:32,143 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 56 [2018-10-04 09:12:32,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:32,143 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2018-10-04 09:12:32,143 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-04 09:12:32,143 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2018-10-04 09:12:32,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-04 09:12:32,144 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:32,144 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:12:32,144 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:32,145 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:32,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1482110592, now seen corresponding path program 20 times [2018-10-04 09:12:32,145 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:32,145 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:32,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:32,146 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:12:32,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:32,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:32,640 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:32,640 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:32,640 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 [2018-10-04 09:12:32,648 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:12:32,692 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:12:32,692 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:32,695 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:32,707 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:32,735 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:32,735 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-04 09:12:32,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-04 09:12:32,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-04 09:12:32,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-04 09:12:32,736 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 24 states. [2018-10-04 09:12:32,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:32,796 INFO L93 Difference]: Finished difference Result 75 states and 79 transitions. [2018-10-04 09:12:32,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-04 09:12:32,796 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 58 [2018-10-04 09:12:32,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:32,797 INFO L225 Difference]: With dead ends: 75 [2018-10-04 09:12:32,797 INFO L226 Difference]: Without dead ends: 61 [2018-10-04 09:12:32,798 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-04 09:12:32,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-04 09:12:32,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-04 09:12:32,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-04 09:12:32,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2018-10-04 09:12:32,802 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 58 [2018-10-04 09:12:32,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:32,803 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2018-10-04 09:12:32,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-04 09:12:32,803 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2018-10-04 09:12:32,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-04 09:12:32,804 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:32,804 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:12:32,804 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:32,804 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:32,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1067269764, now seen corresponding path program 21 times [2018-10-04 09:12:32,805 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:32,805 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:32,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:32,806 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:32,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:32,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:33,368 INFO L134 CoverageAnalysis]: Checked inductivity of 524 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:33,368 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:33,368 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 [2018-10-04 09:12:33,378 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:12:33,426 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2018-10-04 09:12:33,426 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:33,428 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:33,445 INFO L134 CoverageAnalysis]: Checked inductivity of 524 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:33,470 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:33,470 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-04 09:12:33,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-04 09:12:33,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-04 09:12:33,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-04 09:12:33,471 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 25 states. [2018-10-04 09:12:33,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:33,512 INFO L93 Difference]: Finished difference Result 77 states and 81 transitions. [2018-10-04 09:12:33,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-04 09:12:33,513 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 60 [2018-10-04 09:12:33,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:33,514 INFO L225 Difference]: With dead ends: 77 [2018-10-04 09:12:33,514 INFO L226 Difference]: Without dead ends: 63 [2018-10-04 09:12:33,515 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-04 09:12:33,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-04 09:12:33,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-10-04 09:12:33,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-04 09:12:33,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2018-10-04 09:12:33,519 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 60 [2018-10-04 09:12:33,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:33,519 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2018-10-04 09:12:33,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-04 09:12:33,519 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2018-10-04 09:12:33,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-04 09:12:33,520 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:33,520 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:12:33,520 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:33,520 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:33,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1837192584, now seen corresponding path program 22 times [2018-10-04 09:12:33,521 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:33,521 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:33,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:33,521 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:33,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:33,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:33,901 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:33,901 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:33,901 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:12:33,913 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:12:33,963 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:12:33,963 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:33,965 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:33,977 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:33,998 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:33,998 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-04 09:12:33,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-04 09:12:33,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-04 09:12:33,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-04 09:12:33,999 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 26 states. [2018-10-04 09:12:34,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:34,065 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2018-10-04 09:12:34,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-04 09:12:34,065 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 62 [2018-10-04 09:12:34,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:34,066 INFO L225 Difference]: With dead ends: 79 [2018-10-04 09:12:34,066 INFO L226 Difference]: Without dead ends: 65 [2018-10-04 09:12:34,067 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-04 09:12:34,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-04 09:12:34,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-10-04 09:12:34,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-04 09:12:34,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2018-10-04 09:12:34,072 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 62 [2018-10-04 09:12:34,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:34,073 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2018-10-04 09:12:34,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-04 09:12:34,073 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2018-10-04 09:12:34,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-04 09:12:34,073 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:34,073 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:12:34,074 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:34,074 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:34,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1296319604, now seen corresponding path program 23 times [2018-10-04 09:12:34,074 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:34,074 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:34,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:34,075 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:34,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:34,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:34,797 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:34,797 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:34,798 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 [2018-10-04 09:12:34,807 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:12:34,865 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-10-04 09:12:34,865 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:34,867 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:34,879 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:34,909 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:34,909 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-04 09:12:34,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-04 09:12:34,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-04 09:12:34,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-04 09:12:34,910 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 27 states. [2018-10-04 09:12:34,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:34,993 INFO L93 Difference]: Finished difference Result 81 states and 85 transitions. [2018-10-04 09:12:34,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-04 09:12:34,994 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 64 [2018-10-04 09:12:34,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:34,995 INFO L225 Difference]: With dead ends: 81 [2018-10-04 09:12:34,995 INFO L226 Difference]: Without dead ends: 67 [2018-10-04 09:12:34,996 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-04 09:12:34,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-04 09:12:35,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-10-04 09:12:35,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-04 09:12:35,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2018-10-04 09:12:35,004 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 64 [2018-10-04 09:12:35,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:35,004 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2018-10-04 09:12:35,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-04 09:12:35,004 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2018-10-04 09:12:35,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-04 09:12:35,005 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:35,005 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:12:35,005 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:35,006 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:35,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1829457776, now seen corresponding path program 24 times [2018-10-04 09:12:35,006 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:35,006 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:35,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:35,007 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:35,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:35,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:35,929 INFO L134 CoverageAnalysis]: Checked inductivity of 668 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:35,930 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:35,930 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 [2018-10-04 09:12:35,937 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:12:35,991 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-10-04 09:12:35,992 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:35,995 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:36,005 INFO L134 CoverageAnalysis]: Checked inductivity of 668 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:36,025 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:36,025 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-04 09:12:36,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-04 09:12:36,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-04 09:12:36,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-04 09:12:36,026 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 28 states. [2018-10-04 09:12:36,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:36,123 INFO L93 Difference]: Finished difference Result 83 states and 87 transitions. [2018-10-04 09:12:36,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-04 09:12:36,123 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 66 [2018-10-04 09:12:36,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:36,124 INFO L225 Difference]: With dead ends: 83 [2018-10-04 09:12:36,124 INFO L226 Difference]: Without dead ends: 69 [2018-10-04 09:12:36,125 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-04 09:12:36,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-04 09:12:36,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-10-04 09:12:36,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-04 09:12:36,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2018-10-04 09:12:36,128 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 66 [2018-10-04 09:12:36,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:36,129 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2018-10-04 09:12:36,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-04 09:12:36,129 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2018-10-04 09:12:36,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-04 09:12:36,129 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:36,130 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:12:36,130 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:36,130 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:36,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1220834452, now seen corresponding path program 25 times [2018-10-04 09:12:36,130 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:36,130 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:36,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:36,131 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:36,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:36,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:37,052 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:37,053 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:37,053 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 [2018-10-04 09:12:37,060 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:12:37,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:37,107 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:37,119 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:37,147 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:37,147 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-04 09:12:37,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-04 09:12:37,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-04 09:12:37,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-04 09:12:37,148 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 29 states. [2018-10-04 09:12:37,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:37,277 INFO L93 Difference]: Finished difference Result 85 states and 89 transitions. [2018-10-04 09:12:37,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-04 09:12:37,278 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 68 [2018-10-04 09:12:37,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:37,278 INFO L225 Difference]: With dead ends: 85 [2018-10-04 09:12:37,278 INFO L226 Difference]: Without dead ends: 71 [2018-10-04 09:12:37,279 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-04 09:12:37,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-04 09:12:37,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-10-04 09:12:37,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-04 09:12:37,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2018-10-04 09:12:37,285 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 68 [2018-10-04 09:12:37,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:37,285 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2018-10-04 09:12:37,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-04 09:12:37,285 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2018-10-04 09:12:37,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-04 09:12:37,286 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:37,286 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:12:37,286 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:37,286 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:37,286 INFO L82 PathProgramCache]: Analyzing trace with hash 910997608, now seen corresponding path program 26 times [2018-10-04 09:12:37,287 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:37,287 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:37,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:37,287 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:12:37,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:37,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:38,007 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:38,007 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:38,007 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:12:38,031 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:12:38,075 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:12:38,075 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:38,080 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:38,093 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:38,114 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:38,115 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-04 09:12:38,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-04 09:12:38,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-04 09:12:38,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-04 09:12:38,116 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 30 states. [2018-10-04 09:12:38,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:38,174 INFO L93 Difference]: Finished difference Result 87 states and 91 transitions. [2018-10-04 09:12:38,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-04 09:12:38,175 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 70 [2018-10-04 09:12:38,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:38,176 INFO L225 Difference]: With dead ends: 87 [2018-10-04 09:12:38,176 INFO L226 Difference]: Without dead ends: 73 [2018-10-04 09:12:38,177 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-04 09:12:38,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-04 09:12:38,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-10-04 09:12:38,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-04 09:12:38,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2018-10-04 09:12:38,181 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 70 [2018-10-04 09:12:38,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:38,182 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2018-10-04 09:12:38,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-04 09:12:38,182 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2018-10-04 09:12:38,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-04 09:12:38,183 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:38,183 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:12:38,183 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:38,183 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:38,183 INFO L82 PathProgramCache]: Analyzing trace with hash 902207076, now seen corresponding path program 27 times [2018-10-04 09:12:38,183 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:38,183 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:38,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:38,184 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:38,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:38,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:38,608 INFO L134 CoverageAnalysis]: Checked inductivity of 830 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:38,608 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:38,608 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:12:38,616 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:12:38,678 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2018-10-04 09:12:38,678 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:38,681 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:38,694 INFO L134 CoverageAnalysis]: Checked inductivity of 830 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:38,722 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:38,723 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-04 09:12:38,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-04 09:12:38,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-04 09:12:38,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-04 09:12:38,724 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 31 states. [2018-10-04 09:12:38,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:38,806 INFO L93 Difference]: Finished difference Result 89 states and 93 transitions. [2018-10-04 09:12:38,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-04 09:12:38,807 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 72 [2018-10-04 09:12:38,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:38,808 INFO L225 Difference]: With dead ends: 89 [2018-10-04 09:12:38,808 INFO L226 Difference]: Without dead ends: 75 [2018-10-04 09:12:38,809 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-04 09:12:38,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-04 09:12:38,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-10-04 09:12:38,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-04 09:12:38,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2018-10-04 09:12:38,814 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 72 [2018-10-04 09:12:38,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:38,814 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2018-10-04 09:12:38,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-04 09:12:38,814 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2018-10-04 09:12:38,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-04 09:12:38,815 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:38,815 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:12:38,815 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:38,815 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:38,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1044440416, now seen corresponding path program 28 times [2018-10-04 09:12:38,816 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:38,816 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:38,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:38,816 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:38,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:38,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:39,829 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:39,829 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:39,829 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 [2018-10-04 09:12:39,839 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:12:39,883 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:12:39,884 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:39,886 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:39,900 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:39,923 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:39,924 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-04 09:12:39,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-04 09:12:39,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-04 09:12:39,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-04 09:12:39,925 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 32 states. [2018-10-04 09:12:40,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:40,029 INFO L93 Difference]: Finished difference Result 91 states and 95 transitions. [2018-10-04 09:12:40,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-04 09:12:40,029 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 74 [2018-10-04 09:12:40,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:40,030 INFO L225 Difference]: With dead ends: 91 [2018-10-04 09:12:40,030 INFO L226 Difference]: Without dead ends: 77 [2018-10-04 09:12:40,031 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-04 09:12:40,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-04 09:12:40,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-10-04 09:12:40,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-04 09:12:40,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2018-10-04 09:12:40,036 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 74 [2018-10-04 09:12:40,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:40,036 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2018-10-04 09:12:40,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-04 09:12:40,037 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2018-10-04 09:12:40,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-04 09:12:40,037 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:40,037 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:12:40,038 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:40,038 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:40,038 INFO L82 PathProgramCache]: Analyzing trace with hash 291726684, now seen corresponding path program 29 times [2018-10-04 09:12:40,038 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:40,038 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:40,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:40,039 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:40,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:40,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:40,607 INFO L134 CoverageAnalysis]: Checked inductivity of 948 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:40,607 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:40,607 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 [2018-10-04 09:12:40,618 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:12:40,686 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-10-04 09:12:40,687 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:40,690 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:40,700 INFO L134 CoverageAnalysis]: Checked inductivity of 948 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:40,721 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:40,721 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-04 09:12:40,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-04 09:12:40,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-04 09:12:40,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-04 09:12:40,722 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand 33 states. [2018-10-04 09:12:40,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:40,802 INFO L93 Difference]: Finished difference Result 93 states and 97 transitions. [2018-10-04 09:12:40,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-04 09:12:40,803 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 76 [2018-10-04 09:12:40,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:40,803 INFO L225 Difference]: With dead ends: 93 [2018-10-04 09:12:40,804 INFO L226 Difference]: Without dead ends: 79 [2018-10-04 09:12:40,804 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-04 09:12:40,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-04 09:12:40,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-10-04 09:12:40,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-04 09:12:40,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2018-10-04 09:12:40,809 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 76 [2018-10-04 09:12:40,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:40,809 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2018-10-04 09:12:40,810 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-04 09:12:40,810 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2018-10-04 09:12:40,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-04 09:12:40,810 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:40,810 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:12:40,810 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:40,811 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:40,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1511664040, now seen corresponding path program 30 times [2018-10-04 09:12:40,811 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:40,811 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:40,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:40,812 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:40,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:40,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:41,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:41,392 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:41,392 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 [2018-10-04 09:12:41,399 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:12:41,470 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2018-10-04 09:12:41,470 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:41,472 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:41,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:41,508 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:41,508 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-04 09:12:41,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-04 09:12:41,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-04 09:12:41,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-04 09:12:41,509 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand 34 states. [2018-10-04 09:12:41,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:41,565 INFO L93 Difference]: Finished difference Result 95 states and 99 transitions. [2018-10-04 09:12:41,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-04 09:12:41,570 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 78 [2018-10-04 09:12:41,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:41,570 INFO L225 Difference]: With dead ends: 95 [2018-10-04 09:12:41,570 INFO L226 Difference]: Without dead ends: 81 [2018-10-04 09:12:41,571 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-04 09:12:41,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-04 09:12:41,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-10-04 09:12:41,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-10-04 09:12:41,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2018-10-04 09:12:41,574 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 78 [2018-10-04 09:12:41,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:41,575 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2018-10-04 09:12:41,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-04 09:12:41,575 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2018-10-04 09:12:41,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-04 09:12:41,575 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:41,575 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:12:41,576 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:41,576 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:41,576 INFO L82 PathProgramCache]: Analyzing trace with hash 596637780, now seen corresponding path program 31 times [2018-10-04 09:12:41,576 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:41,576 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:41,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:41,577 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:41,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:41,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:42,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:42,380 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:42,380 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 [2018-10-04 09:12:42,388 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:12:42,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:42,451 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:42,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:42,492 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:42,492 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-04 09:12:42,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-04 09:12:42,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-04 09:12:42,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-04 09:12:42,493 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 35 states. [2018-10-04 09:12:42,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:42,604 INFO L93 Difference]: Finished difference Result 97 states and 101 transitions. [2018-10-04 09:12:42,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-04 09:12:42,605 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 80 [2018-10-04 09:12:42,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:42,606 INFO L225 Difference]: With dead ends: 97 [2018-10-04 09:12:42,606 INFO L226 Difference]: Without dead ends: 83 [2018-10-04 09:12:42,607 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-04 09:12:42,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-04 09:12:42,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-10-04 09:12:42,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-04 09:12:42,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2018-10-04 09:12:42,612 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 80 [2018-10-04 09:12:42,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:42,613 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2018-10-04 09:12:42,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-04 09:12:42,613 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2018-10-04 09:12:42,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-04 09:12:42,614 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:42,614 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:12:42,614 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:42,614 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:42,614 INFO L82 PathProgramCache]: Analyzing trace with hash -549876912, now seen corresponding path program 32 times [2018-10-04 09:12:42,615 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:42,615 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:42,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:42,616 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:12:42,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:42,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:43,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1140 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:43,215 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:43,215 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:12:43,223 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:12:43,278 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:12:43,278 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:43,281 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:43,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1140 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:43,313 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:43,313 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-04 09:12:43,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-04 09:12:43,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-04 09:12:43,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-04 09:12:43,314 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 36 states. [2018-10-04 09:12:43,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:43,493 INFO L93 Difference]: Finished difference Result 99 states and 103 transitions. [2018-10-04 09:12:43,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-04 09:12:43,494 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 82 [2018-10-04 09:12:43,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:43,494 INFO L225 Difference]: With dead ends: 99 [2018-10-04 09:12:43,495 INFO L226 Difference]: Without dead ends: 85 [2018-10-04 09:12:43,495 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-04 09:12:43,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-10-04 09:12:43,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-10-04 09:12:43,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-04 09:12:43,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2018-10-04 09:12:43,499 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 82 [2018-10-04 09:12:43,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:43,499 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2018-10-04 09:12:43,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-04 09:12:43,499 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2018-10-04 09:12:43,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-04 09:12:43,500 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:43,500 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:12:43,500 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:43,500 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:43,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1456099148, now seen corresponding path program 33 times [2018-10-04 09:12:43,500 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:43,500 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:43,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:43,501 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:43,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:43,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:44,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1208 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:44,232 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:44,232 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 [2018-10-04 09:12:44,238 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:12:44,317 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 35 check-sat command(s) [2018-10-04 09:12:44,318 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:44,320 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:44,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1208 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:44,356 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:44,356 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-04 09:12:44,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-04 09:12:44,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-04 09:12:44,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-04 09:12:44,357 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 37 states. [2018-10-04 09:12:44,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:44,467 INFO L93 Difference]: Finished difference Result 101 states and 105 transitions. [2018-10-04 09:12:44,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-04 09:12:44,468 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 84 [2018-10-04 09:12:44,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:44,469 INFO L225 Difference]: With dead ends: 101 [2018-10-04 09:12:44,469 INFO L226 Difference]: Without dead ends: 87 [2018-10-04 09:12:44,470 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-04 09:12:44,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-04 09:12:44,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-10-04 09:12:44,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-04 09:12:44,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2018-10-04 09:12:44,475 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 84 [2018-10-04 09:12:44,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:44,476 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2018-10-04 09:12:44,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-04 09:12:44,476 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2018-10-04 09:12:44,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-04 09:12:44,476 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:44,477 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:12:44,477 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:44,477 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:44,477 INFO L82 PathProgramCache]: Analyzing trace with hash 758776904, now seen corresponding path program 34 times [2018-10-04 09:12:44,477 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:44,477 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:44,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:44,478 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:44,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:44,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:45,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:45,194 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:45,194 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:12:45,201 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:12:45,251 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:12:45,251 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:45,254 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:45,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:45,301 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:45,301 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-04 09:12:45,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-04 09:12:45,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-04 09:12:45,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-04 09:12:45,303 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand 38 states. [2018-10-04 09:12:45,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:45,447 INFO L93 Difference]: Finished difference Result 103 states and 107 transitions. [2018-10-04 09:12:45,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-04 09:12:45,448 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 86 [2018-10-04 09:12:45,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:45,449 INFO L225 Difference]: With dead ends: 103 [2018-10-04 09:12:45,449 INFO L226 Difference]: Without dead ends: 89 [2018-10-04 09:12:45,450 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-04 09:12:45,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-04 09:12:45,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-10-04 09:12:45,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-04 09:12:45,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2018-10-04 09:12:45,455 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 86 [2018-10-04 09:12:45,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:45,455 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2018-10-04 09:12:45,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-04 09:12:45,456 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2018-10-04 09:12:45,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-04 09:12:45,456 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:45,456 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:12:45,457 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:45,457 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:45,457 INFO L82 PathProgramCache]: Analyzing trace with hash 646998596, now seen corresponding path program 35 times [2018-10-04 09:12:45,457 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:45,457 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:45,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:45,458 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:45,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:45,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:46,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1350 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:46,122 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:46,122 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 [2018-10-04 09:12:46,138 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:12:46,241 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-10-04 09:12:46,241 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:46,244 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:46,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1350 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:46,294 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:46,294 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-04 09:12:46,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-04 09:12:46,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-04 09:12:46,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-04 09:12:46,296 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand 39 states. [2018-10-04 09:12:47,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:47,017 INFO L93 Difference]: Finished difference Result 105 states and 109 transitions. [2018-10-04 09:12:47,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-04 09:12:47,017 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 88 [2018-10-04 09:12:47,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:47,018 INFO L225 Difference]: With dead ends: 105 [2018-10-04 09:12:47,018 INFO L226 Difference]: Without dead ends: 91 [2018-10-04 09:12:47,018 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-04 09:12:47,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-04 09:12:47,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-10-04 09:12:47,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-04 09:12:47,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2018-10-04 09:12:47,024 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 88 [2018-10-04 09:12:47,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:47,024 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2018-10-04 09:12:47,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-04 09:12:47,024 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2018-10-04 09:12:47,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-04 09:12:47,025 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:47,025 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:12:47,025 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:47,025 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:47,026 INFO L82 PathProgramCache]: Analyzing trace with hash 602227008, now seen corresponding path program 36 times [2018-10-04 09:12:47,026 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:47,026 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:47,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:47,026 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:47,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:47,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:48,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1424 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:48,200 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:48,200 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:12:48,207 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:12:48,293 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2018-10-04 09:12:48,293 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:48,296 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:48,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1424 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:48,342 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:48,342 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-04 09:12:48,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-04 09:12:48,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-04 09:12:48,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-04 09:12:48,344 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand 40 states. [2018-10-04 09:12:48,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:48,508 INFO L93 Difference]: Finished difference Result 107 states and 111 transitions. [2018-10-04 09:12:48,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-04 09:12:48,509 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 90 [2018-10-04 09:12:48,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:48,510 INFO L225 Difference]: With dead ends: 107 [2018-10-04 09:12:48,510 INFO L226 Difference]: Without dead ends: 93 [2018-10-04 09:12:48,511 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-04 09:12:48,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-04 09:12:48,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-10-04 09:12:48,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-10-04 09:12:48,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2018-10-04 09:12:48,515 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 90 [2018-10-04 09:12:48,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:48,515 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2018-10-04 09:12:48,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-04 09:12:48,515 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2018-10-04 09:12:48,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-04 09:12:48,516 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:48,516 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:12:48,516 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:48,516 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:48,516 INFO L82 PathProgramCache]: Analyzing trace with hash 526403900, now seen corresponding path program 37 times [2018-10-04 09:12:48,516 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:48,516 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:48,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:48,517 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:48,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:48,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:49,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1500 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:49,725 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:49,725 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:12:49,734 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:12:49,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:49,794 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:49,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1500 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:49,835 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:49,835 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-04 09:12:49,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-04 09:12:49,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-04 09:12:49,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-04 09:12:49,837 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand 41 states. [2018-10-04 09:12:49,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:49,906 INFO L93 Difference]: Finished difference Result 109 states and 113 transitions. [2018-10-04 09:12:49,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-04 09:12:49,907 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 92 [2018-10-04 09:12:49,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:49,908 INFO L225 Difference]: With dead ends: 109 [2018-10-04 09:12:49,908 INFO L226 Difference]: Without dead ends: 95 [2018-10-04 09:12:49,909 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-04 09:12:49,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-04 09:12:49,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-10-04 09:12:49,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-04 09:12:49,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2018-10-04 09:12:49,915 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 92 [2018-10-04 09:12:49,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:49,915 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2018-10-04 09:12:49,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-04 09:12:49,915 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2018-10-04 09:12:49,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-04 09:12:49,916 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:49,916 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:12:49,916 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:49,916 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:49,916 INFO L82 PathProgramCache]: Analyzing trace with hash 674841144, now seen corresponding path program 38 times [2018-10-04 09:12:49,916 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:49,917 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:49,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:49,917 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:12:49,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:49,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:50,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1578 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:50,629 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:50,629 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 [2018-10-04 09:12:50,637 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:12:50,706 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:12:50,706 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:50,709 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:50,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1578 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:50,756 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:50,756 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-04 09:12:50,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-04 09:12:50,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-04 09:12:50,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-04 09:12:50,758 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand 42 states. [2018-10-04 09:12:50,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:50,865 INFO L93 Difference]: Finished difference Result 111 states and 115 transitions. [2018-10-04 09:12:50,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-04 09:12:50,866 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 94 [2018-10-04 09:12:50,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:50,867 INFO L225 Difference]: With dead ends: 111 [2018-10-04 09:12:50,867 INFO L226 Difference]: Without dead ends: 97 [2018-10-04 09:12:50,868 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-04 09:12:50,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-10-04 09:12:50,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-10-04 09:12:50,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-10-04 09:12:50,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2018-10-04 09:12:50,872 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 94 [2018-10-04 09:12:50,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:50,872 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2018-10-04 09:12:50,872 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-04 09:12:50,873 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2018-10-04 09:12:50,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-10-04 09:12:50,873 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:50,873 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:12:50,873 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:50,874 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:50,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1589111860, now seen corresponding path program 39 times [2018-10-04 09:12:50,874 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:50,874 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:50,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:50,874 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:50,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:50,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:51,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1658 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:51,801 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:51,801 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 [2018-10-04 09:12:51,808 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:12:51,984 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 41 check-sat command(s) [2018-10-04 09:12:51,984 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:51,987 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:52,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1658 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:52,038 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:52,038 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-04 09:12:52,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-04 09:12:52,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-04 09:12:52,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-04 09:12:52,041 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand 43 states. [2018-10-04 09:12:52,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:52,375 INFO L93 Difference]: Finished difference Result 113 states and 117 transitions. [2018-10-04 09:12:52,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-04 09:12:52,376 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 96 [2018-10-04 09:12:52,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:52,377 INFO L225 Difference]: With dead ends: 113 [2018-10-04 09:12:52,377 INFO L226 Difference]: Without dead ends: 99 [2018-10-04 09:12:52,378 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-04 09:12:52,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-04 09:12:52,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-10-04 09:12:52,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-04 09:12:52,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 101 transitions. [2018-10-04 09:12:52,384 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 101 transitions. Word has length 96 [2018-10-04 09:12:52,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:52,384 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 101 transitions. [2018-10-04 09:12:52,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-04 09:12:52,384 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 101 transitions. [2018-10-04 09:12:52,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-04 09:12:52,385 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:52,385 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:12:52,385 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:52,386 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:52,386 INFO L82 PathProgramCache]: Analyzing trace with hash -265025744, now seen corresponding path program 40 times [2018-10-04 09:12:52,386 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:52,386 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:52,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:52,387 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:52,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:52,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:53,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:53,538 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:53,538 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 [2018-10-04 09:12:53,546 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:12:53,608 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:12:53,608 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:53,611 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:53,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:53,662 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:53,662 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-04 09:12:53,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-04 09:12:53,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-04 09:12:53,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-04 09:12:53,664 INFO L87 Difference]: Start difference. First operand 99 states and 101 transitions. Second operand 44 states. [2018-10-04 09:12:54,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:54,981 INFO L93 Difference]: Finished difference Result 115 states and 119 transitions. [2018-10-04 09:12:54,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-04 09:12:54,981 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 98 [2018-10-04 09:12:54,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:54,982 INFO L225 Difference]: With dead ends: 115 [2018-10-04 09:12:54,982 INFO L226 Difference]: Without dead ends: 101 [2018-10-04 09:12:54,983 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-04 09:12:54,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-04 09:12:54,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-10-04 09:12:54,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-04 09:12:54,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2018-10-04 09:12:54,989 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 98 [2018-10-04 09:12:54,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:54,989 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2018-10-04 09:12:54,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-04 09:12:54,989 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2018-10-04 09:12:54,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-04 09:12:54,990 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:54,990 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:12:54,990 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:54,991 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:54,991 INFO L82 PathProgramCache]: Analyzing trace with hash 320164652, now seen corresponding path program 41 times [2018-10-04 09:12:54,991 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:54,991 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:54,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:54,992 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:54,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:55,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:56,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1824 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:56,333 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:56,333 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 [2018-10-04 09:12:56,343 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:12:56,438 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-10-04 09:12:56,438 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:56,442 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:56,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1824 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:56,482 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:56,482 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-04 09:12:56,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-04 09:12:56,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-04 09:12:56,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-04 09:12:56,484 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand 45 states. [2018-10-04 09:12:56,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:56,842 INFO L93 Difference]: Finished difference Result 117 states and 121 transitions. [2018-10-04 09:12:56,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-04 09:12:56,842 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 100 [2018-10-04 09:12:56,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:56,843 INFO L225 Difference]: With dead ends: 117 [2018-10-04 09:12:56,843 INFO L226 Difference]: Without dead ends: 103 [2018-10-04 09:12:56,845 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-04 09:12:56,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-04 09:12:56,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-10-04 09:12:56,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-04 09:12:56,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 105 transitions. [2018-10-04 09:12:56,852 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 105 transitions. Word has length 100 [2018-10-04 09:12:56,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:56,853 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 105 transitions. [2018-10-04 09:12:56,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-04 09:12:56,853 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 105 transitions. [2018-10-04 09:12:56,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-04 09:12:56,853 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:56,854 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:12:56,854 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:56,854 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:56,854 INFO L82 PathProgramCache]: Analyzing trace with hash 47419432, now seen corresponding path program 42 times [2018-10-04 09:12:56,854 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:56,854 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:56,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:56,855 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:56,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:56,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:58,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1910 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:58,126 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:58,126 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 [2018-10-04 09:12:58,136 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:12:58,234 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 44 check-sat command(s) [2018-10-04 09:12:58,235 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:58,237 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:58,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1910 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:58,280 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:58,280 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-04 09:12:58,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-04 09:12:58,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-04 09:12:58,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-04 09:12:58,281 INFO L87 Difference]: Start difference. First operand 103 states and 105 transitions. Second operand 46 states. [2018-10-04 09:12:58,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:58,388 INFO L93 Difference]: Finished difference Result 119 states and 123 transitions. [2018-10-04 09:12:58,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-04 09:12:58,388 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 102 [2018-10-04 09:12:58,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:58,389 INFO L225 Difference]: With dead ends: 119 [2018-10-04 09:12:58,389 INFO L226 Difference]: Without dead ends: 105 [2018-10-04 09:12:58,390 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-04 09:12:58,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-10-04 09:12:58,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-10-04 09:12:58,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-04 09:12:58,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2018-10-04 09:12:58,395 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 102 [2018-10-04 09:12:58,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:58,395 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2018-10-04 09:12:58,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-04 09:12:58,396 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2018-10-04 09:12:58,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-04 09:12:58,396 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:58,396 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:12:58,397 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:58,397 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:58,397 INFO L82 PathProgramCache]: Analyzing trace with hash -67731932, now seen corresponding path program 43 times [2018-10-04 09:12:58,397 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:58,397 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:58,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:58,398 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:58,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:58,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:59,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1998 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:59,473 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:59,474 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:12:59,481 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:12:59,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:59,542 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:59,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1998 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:12:59,584 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:59,584 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-04 09:12:59,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-04 09:12:59,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-04 09:12:59,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-04 09:12:59,585 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand 47 states. [2018-10-04 09:12:59,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:59,897 INFO L93 Difference]: Finished difference Result 121 states and 125 transitions. [2018-10-04 09:12:59,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-04 09:12:59,898 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 104 [2018-10-04 09:12:59,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:59,899 INFO L225 Difference]: With dead ends: 121 [2018-10-04 09:12:59,899 INFO L226 Difference]: Without dead ends: 107 [2018-10-04 09:12:59,900 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-04 09:12:59,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-04 09:12:59,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-10-04 09:12:59,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-04 09:12:59,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 109 transitions. [2018-10-04 09:12:59,906 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 109 transitions. Word has length 104 [2018-10-04 09:12:59,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:59,906 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 109 transitions. [2018-10-04 09:12:59,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-04 09:12:59,907 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 109 transitions. [2018-10-04 09:12:59,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-04 09:12:59,907 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:59,907 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:12:59,908 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:59,908 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:59,908 INFO L82 PathProgramCache]: Analyzing trace with hash 940956960, now seen corresponding path program 44 times [2018-10-04 09:12:59,908 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:59,908 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:59,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:59,909 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:12:59,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:59,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:01,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2088 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:13:01,269 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:01,270 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 [2018-10-04 09:13:01,278 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:13:01,354 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:13:01,354 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:01,357 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:01,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2088 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:13:01,400 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:01,401 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-04 09:13:01,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-04 09:13:01,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-04 09:13:01,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-04 09:13:01,402 INFO L87 Difference]: Start difference. First operand 107 states and 109 transitions. Second operand 48 states. [2018-10-04 09:13:01,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:01,533 INFO L93 Difference]: Finished difference Result 123 states and 127 transitions. [2018-10-04 09:13:01,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-04 09:13:01,534 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 106 [2018-10-04 09:13:01,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:01,535 INFO L225 Difference]: With dead ends: 123 [2018-10-04 09:13:01,535 INFO L226 Difference]: Without dead ends: 109 [2018-10-04 09:13:01,536 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-04 09:13:01,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-10-04 09:13:01,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-10-04 09:13:01,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-10-04 09:13:01,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 111 transitions. [2018-10-04 09:13:01,541 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 111 transitions. Word has length 106 [2018-10-04 09:13:01,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:01,541 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 111 transitions. [2018-10-04 09:13:01,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-04 09:13:01,542 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 111 transitions. [2018-10-04 09:13:01,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-04 09:13:01,542 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:01,542 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:13:01,543 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:01,543 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:01,543 INFO L82 PathProgramCache]: Analyzing trace with hash -371626724, now seen corresponding path program 45 times [2018-10-04 09:13:01,543 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:01,543 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:01,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:01,544 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:01,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:01,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:03,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2180 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:13:03,167 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:03,167 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:13:03,175 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:13:03,286 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2018-10-04 09:13:03,286 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:03,289 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:03,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2180 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:13:03,328 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:03,328 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-10-04 09:13:03,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-04 09:13:03,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-04 09:13:03,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-04 09:13:03,329 INFO L87 Difference]: Start difference. First operand 109 states and 111 transitions. Second operand 49 states. [2018-10-04 09:13:03,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:03,454 INFO L93 Difference]: Finished difference Result 125 states and 129 transitions. [2018-10-04 09:13:03,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-04 09:13:03,454 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 108 [2018-10-04 09:13:03,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:03,455 INFO L225 Difference]: With dead ends: 125 [2018-10-04 09:13:03,455 INFO L226 Difference]: Without dead ends: 111 [2018-10-04 09:13:03,456 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-04 09:13:03,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-04 09:13:03,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-10-04 09:13:03,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-10-04 09:13:03,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2018-10-04 09:13:03,462 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 108 [2018-10-04 09:13:03,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:03,463 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2018-10-04 09:13:03,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-04 09:13:03,463 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2018-10-04 09:13:03,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-04 09:13:03,464 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:03,464 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:13:03,464 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:03,464 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:03,464 INFO L82 PathProgramCache]: Analyzing trace with hash 955837976, now seen corresponding path program 46 times [2018-10-04 09:13:03,464 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:03,464 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:03,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:03,465 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:03,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:03,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:05,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2274 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:13:05,354 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:05,354 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 [2018-10-04 09:13:05,360 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:13:05,440 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:13:05,440 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:05,443 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:05,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2274 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:13:05,485 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:05,485 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-04 09:13:05,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-04 09:13:05,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-04 09:13:05,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-04 09:13:05,486 INFO L87 Difference]: Start difference. First operand 111 states and 113 transitions. Second operand 50 states. [2018-10-04 09:13:05,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:05,675 INFO L93 Difference]: Finished difference Result 127 states and 131 transitions. [2018-10-04 09:13:05,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-04 09:13:05,675 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 110 [2018-10-04 09:13:05,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:05,676 INFO L225 Difference]: With dead ends: 127 [2018-10-04 09:13:05,676 INFO L226 Difference]: Without dead ends: 113 [2018-10-04 09:13:05,677 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-04 09:13:05,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-04 09:13:05,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-10-04 09:13:05,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-10-04 09:13:05,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 115 transitions. [2018-10-04 09:13:05,680 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 115 transitions. Word has length 110 [2018-10-04 09:13:05,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:05,681 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 115 transitions. [2018-10-04 09:13:05,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-04 09:13:05,681 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 115 transitions. [2018-10-04 09:13:05,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-04 09:13:05,681 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:05,681 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:13:05,681 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:05,682 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:05,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1044127764, now seen corresponding path program 47 times [2018-10-04 09:13:05,682 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:05,682 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:05,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:05,683 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:05,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:05,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:07,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2370 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:13:07,034 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:07,034 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 [2018-10-04 09:13:07,040 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:13:07,163 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-10-04 09:13:07,163 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:07,167 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:07,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2370 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:13:07,219 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:07,219 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-04 09:13:07,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-04 09:13:07,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-04 09:13:07,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-04 09:13:07,220 INFO L87 Difference]: Start difference. First operand 113 states and 115 transitions. Second operand 51 states. [2018-10-04 09:13:07,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:07,534 INFO L93 Difference]: Finished difference Result 129 states and 133 transitions. [2018-10-04 09:13:07,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-04 09:13:07,537 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 112 [2018-10-04 09:13:07,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:07,538 INFO L225 Difference]: With dead ends: 129 [2018-10-04 09:13:07,538 INFO L226 Difference]: Without dead ends: 115 [2018-10-04 09:13:07,539 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-04 09:13:07,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-10-04 09:13:07,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-10-04 09:13:07,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-04 09:13:07,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2018-10-04 09:13:07,545 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 112 [2018-10-04 09:13:07,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:07,545 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2018-10-04 09:13:07,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-04 09:13:07,546 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2018-10-04 09:13:07,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-04 09:13:07,546 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:07,546 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:13:07,547 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:07,547 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:07,547 INFO L82 PathProgramCache]: Analyzing trace with hash -8731888, now seen corresponding path program 48 times [2018-10-04 09:13:07,547 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:07,547 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:07,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:07,548 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:07,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:07,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:08,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2468 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:13:08,671 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:08,671 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 [2018-10-04 09:13:08,679 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:13:08,797 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 50 check-sat command(s) [2018-10-04 09:13:08,797 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:08,800 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:08,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2468 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:13:08,837 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:08,837 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-04 09:13:08,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-04 09:13:08,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-04 09:13:08,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-04 09:13:08,839 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand 52 states. [2018-10-04 09:13:09,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:09,010 INFO L93 Difference]: Finished difference Result 131 states and 135 transitions. [2018-10-04 09:13:09,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-04 09:13:09,010 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 114 [2018-10-04 09:13:09,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:09,011 INFO L225 Difference]: With dead ends: 131 [2018-10-04 09:13:09,011 INFO L226 Difference]: Without dead ends: 117 [2018-10-04 09:13:09,012 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-04 09:13:09,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-10-04 09:13:09,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-10-04 09:13:09,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-10-04 09:13:09,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 119 transitions. [2018-10-04 09:13:09,016 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 119 transitions. Word has length 114 [2018-10-04 09:13:09,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:09,016 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 119 transitions. [2018-10-04 09:13:09,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-04 09:13:09,016 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 119 transitions. [2018-10-04 09:13:09,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-04 09:13:09,017 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:09,017 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:13:09,017 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:09,017 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:09,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1805424396, now seen corresponding path program 49 times [2018-10-04 09:13:09,017 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:09,017 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:09,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:09,018 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:09,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:09,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:10,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2568 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:13:10,055 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:10,055 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:13:10,064 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:13:10,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:10,145 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:10,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2568 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:13:10,199 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:10,199 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-04 09:13:10,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-04 09:13:10,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-04 09:13:10,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-04 09:13:10,200 INFO L87 Difference]: Start difference. First operand 117 states and 119 transitions. Second operand 53 states. [2018-10-04 09:13:10,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:10,406 INFO L93 Difference]: Finished difference Result 133 states and 137 transitions. [2018-10-04 09:13:10,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-04 09:13:10,407 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 116 [2018-10-04 09:13:10,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:10,408 INFO L225 Difference]: With dead ends: 133 [2018-10-04 09:13:10,408 INFO L226 Difference]: Without dead ends: 119 [2018-10-04 09:13:10,408 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-04 09:13:10,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-10-04 09:13:10,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-10-04 09:13:10,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-04 09:13:10,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2018-10-04 09:13:10,415 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 116 [2018-10-04 09:13:10,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:10,415 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2018-10-04 09:13:10,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-04 09:13:10,415 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2018-10-04 09:13:10,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-04 09:13:10,416 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:10,416 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:13:10,416 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:10,416 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:10,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1452891144, now seen corresponding path program 50 times [2018-10-04 09:13:10,417 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:10,417 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:10,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:10,418 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:13:10,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:10,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:11,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2670 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:13:11,537 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:11,537 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 [2018-10-04 09:13:11,545 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:13:11,622 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:13:11,622 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:11,625 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:11,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2670 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:13:11,685 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:11,685 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-04 09:13:11,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-04 09:13:11,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-04 09:13:11,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-04 09:13:11,686 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand 54 states. [2018-10-04 09:13:11,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:11,862 INFO L93 Difference]: Finished difference Result 135 states and 139 transitions. [2018-10-04 09:13:11,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-04 09:13:11,862 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 118 [2018-10-04 09:13:11,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:11,863 INFO L225 Difference]: With dead ends: 135 [2018-10-04 09:13:11,863 INFO L226 Difference]: Without dead ends: 121 [2018-10-04 09:13:11,864 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-04 09:13:11,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-10-04 09:13:11,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-10-04 09:13:11,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-10-04 09:13:11,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 123 transitions. [2018-10-04 09:13:11,868 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 123 transitions. Word has length 118 [2018-10-04 09:13:11,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:11,868 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 123 transitions. [2018-10-04 09:13:11,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-04 09:13:11,869 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 123 transitions. [2018-10-04 09:13:11,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-10-04 09:13:11,869 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:11,869 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:13:11,869 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:11,869 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:11,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1970852356, now seen corresponding path program 51 times [2018-10-04 09:13:11,870 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:11,870 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:11,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:11,870 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:11,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:11,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:13,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2774 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:13:13,267 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:13,267 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:13:13,276 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:13:13,412 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 53 check-sat command(s) [2018-10-04 09:13:13,412 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:13,416 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:13,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2774 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:13:13,470 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:13,470 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-04 09:13:13,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-04 09:13:13,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-04 09:13:13,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-04 09:13:13,472 INFO L87 Difference]: Start difference. First operand 121 states and 123 transitions. Second operand 55 states. [2018-10-04 09:13:13,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:13,793 INFO L93 Difference]: Finished difference Result 137 states and 141 transitions. [2018-10-04 09:13:13,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-04 09:13:13,794 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 120 [2018-10-04 09:13:13,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:13,795 INFO L225 Difference]: With dead ends: 137 [2018-10-04 09:13:13,795 INFO L226 Difference]: Without dead ends: 123 [2018-10-04 09:13:13,795 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-04 09:13:13,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-10-04 09:13:13,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-10-04 09:13:13,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-10-04 09:13:13,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 125 transitions. [2018-10-04 09:13:13,802 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 125 transitions. Word has length 120 [2018-10-04 09:13:13,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:13,802 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 125 transitions. [2018-10-04 09:13:13,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-04 09:13:13,802 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 125 transitions. [2018-10-04 09:13:13,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-10-04 09:13:13,803 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:13,803 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:13:13,804 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:13,804 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:13,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1515370752, now seen corresponding path program 52 times [2018-10-04 09:13:13,804 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:13,804 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:13,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:13,805 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:13,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:13,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:14,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2880 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:13:14,902 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:14,902 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 [2018-10-04 09:13:14,910 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:13:14,989 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:13:14,989 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:14,993 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:15,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2880 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:13:15,046 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:15,047 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-04 09:13:15,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-04 09:13:15,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-04 09:13:15,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-04 09:13:15,048 INFO L87 Difference]: Start difference. First operand 123 states and 125 transitions. Second operand 56 states. [2018-10-04 09:13:15,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:15,858 INFO L93 Difference]: Finished difference Result 139 states and 143 transitions. [2018-10-04 09:13:15,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-04 09:13:15,858 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 122 [2018-10-04 09:13:15,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:15,859 INFO L225 Difference]: With dead ends: 139 [2018-10-04 09:13:15,859 INFO L226 Difference]: Without dead ends: 125 [2018-10-04 09:13:15,860 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-04 09:13:15,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-10-04 09:13:15,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-10-04 09:13:15,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-10-04 09:13:15,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 127 transitions. [2018-10-04 09:13:15,866 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 127 transitions. Word has length 122 [2018-10-04 09:13:15,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:15,866 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 127 transitions. [2018-10-04 09:13:15,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-04 09:13:15,867 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 127 transitions. [2018-10-04 09:13:15,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-10-04 09:13:15,867 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:15,867 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:13:15,868 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:15,868 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:15,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1884213500, now seen corresponding path program 53 times [2018-10-04 09:13:15,868 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:15,868 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:15,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:15,869 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:15,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:15,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:17,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2988 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:13:17,146 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:17,146 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 [2018-10-04 09:13:17,161 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:13:17,337 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-10-04 09:13:17,337 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:17,341 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:17,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2988 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:13:17,380 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:17,381 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-10-04 09:13:17,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-04 09:13:17,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-04 09:13:17,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-04 09:13:17,382 INFO L87 Difference]: Start difference. First operand 125 states and 127 transitions. Second operand 57 states. [2018-10-04 09:13:17,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:17,537 INFO L93 Difference]: Finished difference Result 141 states and 145 transitions. [2018-10-04 09:13:17,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-04 09:13:17,537 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 124 [2018-10-04 09:13:17,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:17,538 INFO L225 Difference]: With dead ends: 141 [2018-10-04 09:13:17,538 INFO L226 Difference]: Without dead ends: 127 [2018-10-04 09:13:17,539 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-04 09:13:17,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-10-04 09:13:17,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-10-04 09:13:17,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-10-04 09:13:17,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 129 transitions. [2018-10-04 09:13:17,543 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 129 transitions. Word has length 124 [2018-10-04 09:13:17,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:17,543 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 129 transitions. [2018-10-04 09:13:17,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-04 09:13:17,543 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 129 transitions. [2018-10-04 09:13:17,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-10-04 09:13:17,544 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:17,544 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:13:17,544 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:17,544 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:17,544 INFO L82 PathProgramCache]: Analyzing trace with hash -140191240, now seen corresponding path program 54 times [2018-10-04 09:13:17,544 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:17,544 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:17,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:17,545 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:17,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:17,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:19,013 INFO L134 CoverageAnalysis]: Checked inductivity of 3098 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:13:19,014 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:19,014 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 [2018-10-04 09:13:19,032 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:13:19,212 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 56 check-sat command(s) [2018-10-04 09:13:19,213 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:19,216 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:19,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3098 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:13:19,271 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:19,272 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-04 09:13:19,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-04 09:13:19,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-04 09:13:19,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-04 09:13:19,273 INFO L87 Difference]: Start difference. First operand 127 states and 129 transitions. Second operand 58 states. [2018-10-04 09:13:19,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:19,490 INFO L93 Difference]: Finished difference Result 143 states and 147 transitions. [2018-10-04 09:13:19,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-04 09:13:19,490 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 126 [2018-10-04 09:13:19,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:19,491 INFO L225 Difference]: With dead ends: 143 [2018-10-04 09:13:19,491 INFO L226 Difference]: Without dead ends: 129 [2018-10-04 09:13:19,492 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-04 09:13:19,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-10-04 09:13:19,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-10-04 09:13:19,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-10-04 09:13:19,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 131 transitions. [2018-10-04 09:13:19,496 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 131 transitions. Word has length 126 [2018-10-04 09:13:19,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:19,496 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 131 transitions. [2018-10-04 09:13:19,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-04 09:13:19,497 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 131 transitions. [2018-10-04 09:13:19,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-10-04 09:13:19,497 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:19,497 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:13:19,497 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:19,497 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:19,498 INFO L82 PathProgramCache]: Analyzing trace with hash 27038708, now seen corresponding path program 55 times [2018-10-04 09:13:19,498 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:19,498 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:19,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:19,498 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:19,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:19,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:20,763 INFO L134 CoverageAnalysis]: Checked inductivity of 3210 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:13:20,763 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:20,763 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 [2018-10-04 09:13:20,771 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:13:20,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:20,855 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:20,873 INFO L134 CoverageAnalysis]: Checked inductivity of 3210 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:13:20,893 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:20,894 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-10-04 09:13:20,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-04 09:13:20,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-04 09:13:20,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-04 09:13:20,895 INFO L87 Difference]: Start difference. First operand 129 states and 131 transitions. Second operand 59 states. [2018-10-04 09:13:21,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:21,047 INFO L93 Difference]: Finished difference Result 145 states and 149 transitions. [2018-10-04 09:13:21,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-04 09:13:21,047 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 128 [2018-10-04 09:13:21,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:21,049 INFO L225 Difference]: With dead ends: 145 [2018-10-04 09:13:21,049 INFO L226 Difference]: Without dead ends: 131 [2018-10-04 09:13:21,050 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-04 09:13:21,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-04 09:13:21,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-10-04 09:13:21,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-10-04 09:13:21,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 133 transitions. [2018-10-04 09:13:21,055 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 133 transitions. Word has length 128 [2018-10-04 09:13:21,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:21,055 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 133 transitions. [2018-10-04 09:13:21,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-04 09:13:21,055 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 133 transitions. [2018-10-04 09:13:21,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-10-04 09:13:21,056 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:21,056 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:13:21,056 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:21,056 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:21,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1821228784, now seen corresponding path program 56 times [2018-10-04 09:13:21,056 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:21,056 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:21,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:21,057 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:13:21,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:21,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:22,435 INFO L134 CoverageAnalysis]: Checked inductivity of 3324 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:13:22,435 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:22,435 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 [2018-10-04 09:13:22,443 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:13:22,527 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:13:22,527 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:22,530 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:22,556 INFO L134 CoverageAnalysis]: Checked inductivity of 3324 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:13:22,577 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:22,577 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-10-04 09:13:22,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-04 09:13:22,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-04 09:13:22,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-10-04 09:13:22,578 INFO L87 Difference]: Start difference. First operand 131 states and 133 transitions. Second operand 60 states. [2018-10-04 09:13:22,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:22,686 INFO L93 Difference]: Finished difference Result 147 states and 151 transitions. [2018-10-04 09:13:22,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-04 09:13:22,686 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 130 [2018-10-04 09:13:22,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:22,687 INFO L225 Difference]: With dead ends: 147 [2018-10-04 09:13:22,687 INFO L226 Difference]: Without dead ends: 133 [2018-10-04 09:13:22,687 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-10-04 09:13:22,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-10-04 09:13:22,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-10-04 09:13:22,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-10-04 09:13:22,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 135 transitions. [2018-10-04 09:13:22,691 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 135 transitions. Word has length 130 [2018-10-04 09:13:22,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:22,692 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 135 transitions. [2018-10-04 09:13:22,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-04 09:13:22,692 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 135 transitions. [2018-10-04 09:13:22,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-10-04 09:13:22,693 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:22,693 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:13:22,693 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:22,693 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:22,693 INFO L82 PathProgramCache]: Analyzing trace with hash -538961172, now seen corresponding path program 57 times [2018-10-04 09:13:22,693 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:22,694 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:22,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:22,694 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:22,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:22,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:24,301 INFO L134 CoverageAnalysis]: Checked inductivity of 3440 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:13:24,301 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:24,301 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 [2018-10-04 09:13:24,310 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:13:24,461 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 59 check-sat command(s) [2018-10-04 09:13:24,462 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:24,464 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:24,484 INFO L134 CoverageAnalysis]: Checked inductivity of 3440 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:13:24,505 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:24,505 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-10-04 09:13:24,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-04 09:13:24,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-04 09:13:24,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-10-04 09:13:24,506 INFO L87 Difference]: Start difference. First operand 133 states and 135 transitions. Second operand 61 states. [2018-10-04 09:13:24,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:24,611 INFO L93 Difference]: Finished difference Result 149 states and 153 transitions. [2018-10-04 09:13:24,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-04 09:13:24,611 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 132 [2018-10-04 09:13:24,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:24,612 INFO L225 Difference]: With dead ends: 149 [2018-10-04 09:13:24,613 INFO L226 Difference]: Without dead ends: 135 [2018-10-04 09:13:24,613 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-10-04 09:13:24,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-10-04 09:13:24,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-10-04 09:13:24,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-10-04 09:13:24,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 137 transitions. [2018-10-04 09:13:24,620 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 137 transitions. Word has length 132 [2018-10-04 09:13:24,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:24,620 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 137 transitions. [2018-10-04 09:13:24,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-04 09:13:24,620 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 137 transitions. [2018-10-04 09:13:24,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-10-04 09:13:24,621 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:24,621 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:13:24,621 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:24,621 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:24,621 INFO L82 PathProgramCache]: Analyzing trace with hash -938776600, now seen corresponding path program 58 times [2018-10-04 09:13:24,622 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:24,622 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:24,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:24,622 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:24,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:24,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:26,076 INFO L134 CoverageAnalysis]: Checked inductivity of 3558 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:13:26,076 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:26,076 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:13:26,084 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:13:26,169 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:13:26,169 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:26,172 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:26,200 INFO L134 CoverageAnalysis]: Checked inductivity of 3558 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:13:26,221 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:26,221 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-10-04 09:13:26,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-04 09:13:26,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-04 09:13:26,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-10-04 09:13:26,222 INFO L87 Difference]: Start difference. First operand 135 states and 137 transitions. Second operand 62 states. [2018-10-04 09:13:26,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:26,403 INFO L93 Difference]: Finished difference Result 151 states and 155 transitions. [2018-10-04 09:13:26,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-04 09:13:26,404 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 134 [2018-10-04 09:13:26,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:26,404 INFO L225 Difference]: With dead ends: 151 [2018-10-04 09:13:26,404 INFO L226 Difference]: Without dead ends: 137 [2018-10-04 09:13:26,405 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-10-04 09:13:26,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-10-04 09:13:26,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-10-04 09:13:26,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-10-04 09:13:26,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 139 transitions. [2018-10-04 09:13:26,410 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 139 transitions. Word has length 134 [2018-10-04 09:13:26,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:26,410 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 139 transitions. [2018-10-04 09:13:26,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-04 09:13:26,410 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 139 transitions. [2018-10-04 09:13:26,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-10-04 09:13:26,411 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:26,411 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:13:26,411 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:26,411 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:26,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1385653732, now seen corresponding path program 59 times [2018-10-04 09:13:26,411 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:26,411 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:26,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:26,412 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:26,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:26,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:27,893 INFO L134 CoverageAnalysis]: Checked inductivity of 3678 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:13:27,893 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:27,893 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 [2018-10-04 09:13:27,901 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:13:28,063 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 61 check-sat command(s) [2018-10-04 09:13:28,064 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:28,067 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:28,095 INFO L134 CoverageAnalysis]: Checked inductivity of 3678 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:13:28,124 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:28,124 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-10-04 09:13:28,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-04 09:13:28,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-04 09:13:28,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-10-04 09:13:28,126 INFO L87 Difference]: Start difference. First operand 137 states and 139 transitions. Second operand 63 states. [2018-10-04 09:13:28,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:28,255 INFO L93 Difference]: Finished difference Result 153 states and 157 transitions. [2018-10-04 09:13:28,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-04 09:13:28,255 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 136 [2018-10-04 09:13:28,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:28,256 INFO L225 Difference]: With dead ends: 153 [2018-10-04 09:13:28,256 INFO L226 Difference]: Without dead ends: 139 [2018-10-04 09:13:28,257 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-10-04 09:13:28,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-10-04 09:13:28,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-10-04 09:13:28,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-10-04 09:13:28,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 141 transitions. [2018-10-04 09:13:28,263 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 141 transitions. Word has length 136 [2018-10-04 09:13:28,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:28,263 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 141 transitions. [2018-10-04 09:13:28,263 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-04 09:13:28,263 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 141 transitions. [2018-10-04 09:13:28,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-10-04 09:13:28,264 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:28,264 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:13:28,264 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:28,264 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:28,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1780208864, now seen corresponding path program 60 times [2018-10-04 09:13:28,265 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:28,265 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:28,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:28,265 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:28,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:28,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:29,667 INFO L134 CoverageAnalysis]: Checked inductivity of 3800 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:13:29,667 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:29,667 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 [2018-10-04 09:13:29,675 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:13:29,827 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 62 check-sat command(s) [2018-10-04 09:13:29,827 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:29,831 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:29,854 INFO L134 CoverageAnalysis]: Checked inductivity of 3800 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:13:29,874 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:29,875 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-10-04 09:13:29,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-04 09:13:29,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-04 09:13:29,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-10-04 09:13:29,876 INFO L87 Difference]: Start difference. First operand 139 states and 141 transitions. Second operand 64 states. [2018-10-04 09:13:29,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:29,997 INFO L93 Difference]: Finished difference Result 155 states and 159 transitions. [2018-10-04 09:13:29,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-04 09:13:29,998 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 138 [2018-10-04 09:13:29,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:29,999 INFO L225 Difference]: With dead ends: 155 [2018-10-04 09:13:29,999 INFO L226 Difference]: Without dead ends: 141 [2018-10-04 09:13:30,000 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-10-04 09:13:30,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-10-04 09:13:30,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-10-04 09:13:30,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-10-04 09:13:30,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 143 transitions. [2018-10-04 09:13:30,006 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 143 transitions. Word has length 138 [2018-10-04 09:13:30,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:30,006 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 143 transitions. [2018-10-04 09:13:30,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-04 09:13:30,006 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 143 transitions. [2018-10-04 09:13:30,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-10-04 09:13:30,007 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:30,007 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:13:30,008 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:30,008 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:30,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1304398628, now seen corresponding path program 61 times [2018-10-04 09:13:30,008 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:30,008 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:30,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:30,009 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:30,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:30,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:31,483 INFO L134 CoverageAnalysis]: Checked inductivity of 3924 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:13:31,483 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:31,483 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 [2018-10-04 09:13:31,493 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:13:31,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:31,583 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:31,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3924 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:13:31,626 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:31,626 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-10-04 09:13:31,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-04 09:13:31,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-04 09:13:31,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-04 09:13:31,628 INFO L87 Difference]: Start difference. First operand 141 states and 143 transitions. Second operand 65 states. [2018-10-04 09:13:31,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:31,824 INFO L93 Difference]: Finished difference Result 157 states and 161 transitions. [2018-10-04 09:13:31,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-04 09:13:31,824 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 140 [2018-10-04 09:13:31,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:31,825 INFO L225 Difference]: With dead ends: 157 [2018-10-04 09:13:31,825 INFO L226 Difference]: Without dead ends: 143 [2018-10-04 09:13:31,826 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-04 09:13:31,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-10-04 09:13:31,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-10-04 09:13:31,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-10-04 09:13:31,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 145 transitions. [2018-10-04 09:13:31,830 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 145 transitions. Word has length 140 [2018-10-04 09:13:31,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:31,830 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 145 transitions. [2018-10-04 09:13:31,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-04 09:13:31,830 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 145 transitions. [2018-10-04 09:13:31,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-10-04 09:13:31,831 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:31,831 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:13:31,831 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:31,831 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:31,832 INFO L82 PathProgramCache]: Analyzing trace with hash -2084764200, now seen corresponding path program 62 times [2018-10-04 09:13:31,832 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:31,832 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:31,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:31,832 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:13:31,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:31,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:33,741 INFO L134 CoverageAnalysis]: Checked inductivity of 4050 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:13:33,741 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:33,742 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:13:33,750 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:13:33,841 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:13:33,841 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:33,844 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:33,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4050 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:13:33,887 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:33,887 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-10-04 09:13:33,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-04 09:13:33,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-04 09:13:33,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-10-04 09:13:33,889 INFO L87 Difference]: Start difference. First operand 143 states and 145 transitions. Second operand 66 states. [2018-10-04 09:13:34,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:34,428 INFO L93 Difference]: Finished difference Result 159 states and 163 transitions. [2018-10-04 09:13:34,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-04 09:13:34,428 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 142 [2018-10-04 09:13:34,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:34,429 INFO L225 Difference]: With dead ends: 159 [2018-10-04 09:13:34,430 INFO L226 Difference]: Without dead ends: 145 [2018-10-04 09:13:34,430 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-10-04 09:13:34,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-10-04 09:13:34,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-10-04 09:13:34,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-10-04 09:13:34,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 147 transitions. [2018-10-04 09:13:34,439 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 147 transitions. Word has length 142 [2018-10-04 09:13:34,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:34,439 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 147 transitions. [2018-10-04 09:13:34,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-04 09:13:34,439 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 147 transitions. [2018-10-04 09:13:34,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-10-04 09:13:34,440 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:34,440 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:13:34,441 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:34,441 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:34,441 INFO L82 PathProgramCache]: Analyzing trace with hash -396802092, now seen corresponding path program 63 times [2018-10-04 09:13:34,441 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:34,441 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:34,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:34,442 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:34,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:34,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:36,407 INFO L134 CoverageAnalysis]: Checked inductivity of 4178 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:13:36,408 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:36,408 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 [2018-10-04 09:13:36,415 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:13:36,589 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 65 check-sat command(s) [2018-10-04 09:13:36,589 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:36,593 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:36,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4178 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:13:36,636 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:36,636 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-10-04 09:13:36,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-04 09:13:36,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-04 09:13:36,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-10-04 09:13:36,637 INFO L87 Difference]: Start difference. First operand 145 states and 147 transitions. Second operand 67 states. [2018-10-04 09:13:36,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:36,832 INFO L93 Difference]: Finished difference Result 161 states and 165 transitions. [2018-10-04 09:13:36,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-04 09:13:36,833 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 144 [2018-10-04 09:13:36,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:36,834 INFO L225 Difference]: With dead ends: 161 [2018-10-04 09:13:36,834 INFO L226 Difference]: Without dead ends: 147 [2018-10-04 09:13:36,834 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-10-04 09:13:36,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-10-04 09:13:36,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-10-04 09:13:36,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-10-04 09:13:36,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 149 transitions. [2018-10-04 09:13:36,841 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 149 transitions. Word has length 144 [2018-10-04 09:13:36,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:36,841 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 149 transitions. [2018-10-04 09:13:36,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-04 09:13:36,841 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 149 transitions. [2018-10-04 09:13:36,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-10-04 09:13:36,842 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:36,842 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:13:36,843 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:36,843 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:36,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1762854192, now seen corresponding path program 64 times [2018-10-04 09:13:36,843 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:36,843 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:36,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:36,844 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:36,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:36,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:38,680 INFO L134 CoverageAnalysis]: Checked inductivity of 4308 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:13:38,681 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:38,681 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 [2018-10-04 09:13:38,690 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:13:38,786 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:13:38,786 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:38,789 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:38,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4308 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:13:38,857 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:38,857 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-10-04 09:13:38,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-04 09:13:38,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-04 09:13:38,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-10-04 09:13:38,859 INFO L87 Difference]: Start difference. First operand 147 states and 149 transitions. Second operand 68 states. [2018-10-04 09:13:39,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:39,066 INFO L93 Difference]: Finished difference Result 163 states and 167 transitions. [2018-10-04 09:13:39,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-04 09:13:39,066 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 146 [2018-10-04 09:13:39,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:39,067 INFO L225 Difference]: With dead ends: 163 [2018-10-04 09:13:39,067 INFO L226 Difference]: Without dead ends: 149 [2018-10-04 09:13:39,068 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-10-04 09:13:39,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-10-04 09:13:39,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-10-04 09:13:39,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-10-04 09:13:39,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 151 transitions. [2018-10-04 09:13:39,076 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 151 transitions. Word has length 146 [2018-10-04 09:13:39,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:39,076 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 151 transitions. [2018-10-04 09:13:39,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-04 09:13:39,077 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 151 transitions. [2018-10-04 09:13:39,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-10-04 09:13:39,077 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:39,077 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:13:39,078 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:39,078 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:39,078 INFO L82 PathProgramCache]: Analyzing trace with hash -278929716, now seen corresponding path program 65 times [2018-10-04 09:13:39,078 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:39,078 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:39,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:39,079 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:39,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:39,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:40,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4440 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:13:40,857 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:40,858 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 [2018-10-04 09:13:40,865 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:13:41,042 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 67 check-sat command(s) [2018-10-04 09:13:41,043 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:41,046 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:41,078 INFO L134 CoverageAnalysis]: Checked inductivity of 4440 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:13:41,109 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:41,109 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-10-04 09:13:41,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-04 09:13:41,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-04 09:13:41,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-10-04 09:13:41,111 INFO L87 Difference]: Start difference. First operand 149 states and 151 transitions. Second operand 69 states. [2018-10-04 09:13:41,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:41,334 INFO L93 Difference]: Finished difference Result 165 states and 169 transitions. [2018-10-04 09:13:41,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-04 09:13:41,335 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 148 [2018-10-04 09:13:41,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:41,336 INFO L225 Difference]: With dead ends: 165 [2018-10-04 09:13:41,336 INFO L226 Difference]: Without dead ends: 151 [2018-10-04 09:13:41,336 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-10-04 09:13:41,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-10-04 09:13:41,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-10-04 09:13:41,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-10-04 09:13:41,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 153 transitions. [2018-10-04 09:13:41,342 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 153 transitions. Word has length 148 [2018-10-04 09:13:41,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:41,343 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 153 transitions. [2018-10-04 09:13:41,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-04 09:13:41,343 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 153 transitions. [2018-10-04 09:13:41,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-10-04 09:13:41,344 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:41,344 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:13:41,344 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:41,344 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:41,344 INFO L82 PathProgramCache]: Analyzing trace with hash -156650552, now seen corresponding path program 66 times [2018-10-04 09:13:41,345 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:41,345 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:41,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:41,345 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:41,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:41,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:43,049 INFO L134 CoverageAnalysis]: Checked inductivity of 4574 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:13:43,049 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:43,049 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 [2018-10-04 09:13:43,057 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:13:43,243 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 68 check-sat command(s) [2018-10-04 09:13:43,243 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:43,247 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:43,279 INFO L134 CoverageAnalysis]: Checked inductivity of 4574 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:13:43,304 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:43,304 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-10-04 09:13:43,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-04 09:13:43,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-04 09:13:43,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-10-04 09:13:43,305 INFO L87 Difference]: Start difference. First operand 151 states and 153 transitions. Second operand 70 states. [2018-10-04 09:13:43,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:43,659 INFO L93 Difference]: Finished difference Result 167 states and 171 transitions. [2018-10-04 09:13:43,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-04 09:13:43,660 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 150 [2018-10-04 09:13:43,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:43,660 INFO L225 Difference]: With dead ends: 167 [2018-10-04 09:13:43,660 INFO L226 Difference]: Without dead ends: 153 [2018-10-04 09:13:43,661 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-10-04 09:13:43,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-10-04 09:13:43,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-10-04 09:13:43,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-10-04 09:13:43,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 155 transitions. [2018-10-04 09:13:43,665 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 155 transitions. Word has length 150 [2018-10-04 09:13:43,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:43,666 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 155 transitions. [2018-10-04 09:13:43,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-04 09:13:43,666 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 155 transitions. [2018-10-04 09:13:43,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-10-04 09:13:43,666 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:43,666 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:13:43,667 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:43,667 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:43,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1389509060, now seen corresponding path program 67 times [2018-10-04 09:13:43,667 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:43,667 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:43,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:43,668 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:43,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:43,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:45,450 INFO L134 CoverageAnalysis]: Checked inductivity of 4710 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:13:45,450 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:45,450 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:13:45,458 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:13:45,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:45,565 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:45,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4710 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:13:45,651 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:45,651 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-10-04 09:13:45,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-04 09:13:45,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-04 09:13:45,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-10-04 09:13:45,652 INFO L87 Difference]: Start difference. First operand 153 states and 155 transitions. Second operand 71 states. [2018-10-04 09:13:45,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:45,872 INFO L93 Difference]: Finished difference Result 169 states and 173 transitions. [2018-10-04 09:13:45,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-04 09:13:45,872 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 152 [2018-10-04 09:13:45,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:45,873 INFO L225 Difference]: With dead ends: 169 [2018-10-04 09:13:45,873 INFO L226 Difference]: Without dead ends: 155 [2018-10-04 09:13:45,874 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-10-04 09:13:45,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-10-04 09:13:45,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-10-04 09:13:45,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-10-04 09:13:45,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 157 transitions. [2018-10-04 09:13:45,880 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 157 transitions. Word has length 152 [2018-10-04 09:13:45,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:45,880 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 157 transitions. [2018-10-04 09:13:45,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-04 09:13:45,881 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 157 transitions. [2018-10-04 09:13:45,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-10-04 09:13:45,881 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:45,881 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:13:45,881 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:45,882 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:45,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1190211776, now seen corresponding path program 68 times [2018-10-04 09:13:45,882 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:45,882 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:45,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:45,883 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:13:45,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:45,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:47,650 INFO L134 CoverageAnalysis]: Checked inductivity of 4848 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:13:47,651 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:47,651 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:13:47,659 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:13:47,759 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:13:47,760 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:47,763 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:47,796 INFO L134 CoverageAnalysis]: Checked inductivity of 4848 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:13:47,825 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:47,825 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-10-04 09:13:47,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-04 09:13:47,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-04 09:13:47,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-10-04 09:13:47,827 INFO L87 Difference]: Start difference. First operand 155 states and 157 transitions. Second operand 72 states. [2018-10-04 09:13:48,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:48,507 INFO L93 Difference]: Finished difference Result 171 states and 175 transitions. [2018-10-04 09:13:48,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-04 09:13:48,507 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 154 [2018-10-04 09:13:48,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:48,508 INFO L225 Difference]: With dead ends: 171 [2018-10-04 09:13:48,508 INFO L226 Difference]: Without dead ends: 157 [2018-10-04 09:13:48,509 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-10-04 09:13:48,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-10-04 09:13:48,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-10-04 09:13:48,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-10-04 09:13:48,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 159 transitions. [2018-10-04 09:13:48,514 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 159 transitions. Word has length 154 [2018-10-04 09:13:48,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:48,514 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 159 transitions. [2018-10-04 09:13:48,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-04 09:13:48,514 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 159 transitions. [2018-10-04 09:13:48,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-10-04 09:13:48,515 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:48,515 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:13:48,515 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:48,515 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:48,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1355917124, now seen corresponding path program 69 times [2018-10-04 09:13:48,516 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:48,516 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:48,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:48,517 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:48,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:48,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:50,457 INFO L134 CoverageAnalysis]: Checked inductivity of 4988 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:13:50,457 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:50,457 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 [2018-10-04 09:13:50,464 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:13:50,662 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 71 check-sat command(s) [2018-10-04 09:13:50,662 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:50,666 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:50,696 INFO L134 CoverageAnalysis]: Checked inductivity of 4988 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:13:50,716 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:50,716 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-10-04 09:13:50,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-04 09:13:50,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-04 09:13:50,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-10-04 09:13:50,718 INFO L87 Difference]: Start difference. First operand 157 states and 159 transitions. Second operand 73 states. [2018-10-04 09:13:50,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:50,859 INFO L93 Difference]: Finished difference Result 173 states and 177 transitions. [2018-10-04 09:13:50,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-04 09:13:50,859 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 156 [2018-10-04 09:13:50,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:50,861 INFO L225 Difference]: With dead ends: 173 [2018-10-04 09:13:50,861 INFO L226 Difference]: Without dead ends: 159 [2018-10-04 09:13:50,862 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-10-04 09:13:50,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-10-04 09:13:50,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-10-04 09:13:50,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-10-04 09:13:50,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 161 transitions. [2018-10-04 09:13:50,869 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 161 transitions. Word has length 156 [2018-10-04 09:13:50,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:50,870 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 161 transitions. [2018-10-04 09:13:50,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-04 09:13:50,870 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 161 transitions. [2018-10-04 09:13:50,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-10-04 09:13:50,870 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:50,871 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:13:50,871 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:50,871 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:50,871 INFO L82 PathProgramCache]: Analyzing trace with hash -54431304, now seen corresponding path program 70 times [2018-10-04 09:13:50,871 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:50,871 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:50,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:50,872 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:50,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:50,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:52,795 INFO L134 CoverageAnalysis]: Checked inductivity of 5130 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:13:52,795 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:52,795 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 [2018-10-04 09:13:52,802 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:13:52,902 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:13:52,902 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:52,906 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:52,941 INFO L134 CoverageAnalysis]: Checked inductivity of 5130 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:13:52,971 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:52,971 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-10-04 09:13:52,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-04 09:13:52,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-04 09:13:52,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-10-04 09:13:52,973 INFO L87 Difference]: Start difference. First operand 159 states and 161 transitions. Second operand 74 states. [2018-10-04 09:13:53,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:53,253 INFO L93 Difference]: Finished difference Result 175 states and 179 transitions. [2018-10-04 09:13:53,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-04 09:13:53,253 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 158 [2018-10-04 09:13:53,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:53,255 INFO L225 Difference]: With dead ends: 175 [2018-10-04 09:13:53,255 INFO L226 Difference]: Without dead ends: 161 [2018-10-04 09:13:53,256 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-10-04 09:13:53,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-10-04 09:13:53,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-10-04 09:13:53,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-10-04 09:13:53,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 163 transitions. [2018-10-04 09:13:53,263 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 163 transitions. Word has length 158 [2018-10-04 09:13:53,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:53,263 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 163 transitions. [2018-10-04 09:13:53,264 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-04 09:13:53,264 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 163 transitions. [2018-10-04 09:13:53,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-10-04 09:13:53,264 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:53,265 INFO L375 BasicCegarLoop]: trace histogram [73, 72, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:13:53,265 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:53,265 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:53,265 INFO L82 PathProgramCache]: Analyzing trace with hash 837958580, now seen corresponding path program 71 times [2018-10-04 09:13:53,265 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:53,265 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:53,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:53,266 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:53,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:53,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:55,512 INFO L134 CoverageAnalysis]: Checked inductivity of 5274 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:13:55,512 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:55,512 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 [2018-10-04 09:13:55,519 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:13:55,711 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 73 check-sat command(s) [2018-10-04 09:13:55,711 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:55,716 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:55,742 INFO L134 CoverageAnalysis]: Checked inductivity of 5274 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:13:55,763 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:55,763 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-10-04 09:13:55,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-04 09:13:55,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-04 09:13:55,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-10-04 09:13:55,765 INFO L87 Difference]: Start difference. First operand 161 states and 163 transitions. Second operand 75 states. [2018-10-04 09:13:55,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:55,937 INFO L93 Difference]: Finished difference Result 177 states and 181 transitions. [2018-10-04 09:13:55,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-04 09:13:55,938 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 160 [2018-10-04 09:13:55,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:55,939 INFO L225 Difference]: With dead ends: 177 [2018-10-04 09:13:55,939 INFO L226 Difference]: Without dead ends: 163 [2018-10-04 09:13:55,940 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-10-04 09:13:55,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-10-04 09:13:55,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-10-04 09:13:55,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-10-04 09:13:55,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 165 transitions. [2018-10-04 09:13:55,946 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 165 transitions. Word has length 160 [2018-10-04 09:13:55,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:55,947 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 165 transitions. [2018-10-04 09:13:55,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-04 09:13:55,947 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 165 transitions. [2018-10-04 09:13:55,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-10-04 09:13:55,948 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:55,948 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:13:55,948 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:55,948 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:55,948 INFO L82 PathProgramCache]: Analyzing trace with hash -568822096, now seen corresponding path program 72 times [2018-10-04 09:13:55,949 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:55,949 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:55,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:55,949 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:55,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:55,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:58,011 INFO L134 CoverageAnalysis]: Checked inductivity of 5420 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:13:58,011 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:58,011 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 [2018-10-04 09:13:58,019 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:13:58,238 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 74 check-sat command(s) [2018-10-04 09:13:58,238 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:58,242 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:58,269 INFO L134 CoverageAnalysis]: Checked inductivity of 5420 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:13:58,289 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:58,289 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-10-04 09:13:58,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-04 09:13:58,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-04 09:13:58,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-10-04 09:13:58,290 INFO L87 Difference]: Start difference. First operand 163 states and 165 transitions. Second operand 76 states. [2018-10-04 09:13:58,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:58,578 INFO L93 Difference]: Finished difference Result 179 states and 183 transitions. [2018-10-04 09:13:58,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-04 09:13:58,579 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 162 [2018-10-04 09:13:58,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:58,580 INFO L225 Difference]: With dead ends: 179 [2018-10-04 09:13:58,580 INFO L226 Difference]: Without dead ends: 165 [2018-10-04 09:13:58,581 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-10-04 09:13:58,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-10-04 09:13:58,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-10-04 09:13:58,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-10-04 09:13:58,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 167 transitions. [2018-10-04 09:13:58,586 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 167 transitions. Word has length 162 [2018-10-04 09:13:58,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:58,586 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 167 transitions. [2018-10-04 09:13:58,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-04 09:13:58,586 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 167 transitions. [2018-10-04 09:13:58,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-10-04 09:13:58,587 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:58,587 INFO L375 BasicCegarLoop]: trace histogram [75, 74, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:13:58,587 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:58,587 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:58,587 INFO L82 PathProgramCache]: Analyzing trace with hash 429646508, now seen corresponding path program 73 times [2018-10-04 09:13:58,588 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:58,588 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:58,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:58,588 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:58,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:58,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:00,731 INFO L134 CoverageAnalysis]: Checked inductivity of 5568 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:14:00,731 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:14:00,732 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 [2018-10-04 09:14:00,739 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:14:00,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:00,848 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:14:00,876 INFO L134 CoverageAnalysis]: Checked inductivity of 5568 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:14:00,896 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:14:00,896 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-10-04 09:14:00,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-04 09:14:00,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-04 09:14:00,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-10-04 09:14:00,898 INFO L87 Difference]: Start difference. First operand 165 states and 167 transitions. Second operand 77 states. [2018-10-04 09:14:01,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:14:01,072 INFO L93 Difference]: Finished difference Result 181 states and 185 transitions. [2018-10-04 09:14:01,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-04 09:14:01,072 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 164 [2018-10-04 09:14:01,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:14:01,073 INFO L225 Difference]: With dead ends: 181 [2018-10-04 09:14:01,073 INFO L226 Difference]: Without dead ends: 167 [2018-10-04 09:14:01,074 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-10-04 09:14:01,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-10-04 09:14:01,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-10-04 09:14:01,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-10-04 09:14:01,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 169 transitions. [2018-10-04 09:14:01,079 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 169 transitions. Word has length 164 [2018-10-04 09:14:01,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:14:01,079 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 169 transitions. [2018-10-04 09:14:01,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-04 09:14:01,079 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 169 transitions. [2018-10-04 09:14:01,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-10-04 09:14:01,080 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:14:01,080 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:14:01,080 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:14:01,080 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:14:01,080 INFO L82 PathProgramCache]: Analyzing trace with hash -2114699352, now seen corresponding path program 74 times [2018-10-04 09:14:01,080 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:14:01,080 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:14:01,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:01,081 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:14:01,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:01,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:03,179 INFO L134 CoverageAnalysis]: Checked inductivity of 5718 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:14:03,180 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:14:03,180 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 [2018-10-04 09:14:03,186 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:14:03,295 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:14:03,296 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:14:03,299 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:14:03,337 INFO L134 CoverageAnalysis]: Checked inductivity of 5718 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:14:03,366 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:14:03,366 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-10-04 09:14:03,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-04 09:14:03,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-04 09:14:03,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-10-04 09:14:03,368 INFO L87 Difference]: Start difference. First operand 167 states and 169 transitions. Second operand 78 states. [2018-10-04 09:14:03,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:14:03,536 INFO L93 Difference]: Finished difference Result 183 states and 187 transitions. [2018-10-04 09:14:03,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-04 09:14:03,536 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 166 [2018-10-04 09:14:03,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:14:03,537 INFO L225 Difference]: With dead ends: 183 [2018-10-04 09:14:03,537 INFO L226 Difference]: Without dead ends: 169 [2018-10-04 09:14:03,538 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-10-04 09:14:03,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-10-04 09:14:03,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-10-04 09:14:03,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-10-04 09:14:03,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 171 transitions. [2018-10-04 09:14:03,543 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 171 transitions. Word has length 166 [2018-10-04 09:14:03,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:14:03,543 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 171 transitions. [2018-10-04 09:14:03,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-04 09:14:03,543 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 171 transitions. [2018-10-04 09:14:03,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-10-04 09:14:03,544 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:14:03,544 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:14:03,544 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:14:03,544 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:14:03,544 INFO L82 PathProgramCache]: Analyzing trace with hash 900287908, now seen corresponding path program 75 times [2018-10-04 09:14:03,544 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:14:03,544 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:14:03,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:03,545 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:14:03,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:03,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:06,055 INFO L134 CoverageAnalysis]: Checked inductivity of 5870 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:14:06,055 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:14:06,055 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:14:06,062 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:14:06,306 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 77 check-sat command(s) [2018-10-04 09:14:06,306 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:14:06,310 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:14:06,337 INFO L134 CoverageAnalysis]: Checked inductivity of 5870 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:14:06,358 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:14:06,359 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-10-04 09:14:06,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-10-04 09:14:06,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-10-04 09:14:06,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-10-04 09:14:06,360 INFO L87 Difference]: Start difference. First operand 169 states and 171 transitions. Second operand 79 states. [2018-10-04 09:14:06,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:14:06,526 INFO L93 Difference]: Finished difference Result 185 states and 189 transitions. [2018-10-04 09:14:06,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-04 09:14:06,526 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 168 [2018-10-04 09:14:06,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:14:06,527 INFO L225 Difference]: With dead ends: 185 [2018-10-04 09:14:06,527 INFO L226 Difference]: Without dead ends: 171 [2018-10-04 09:14:06,528 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-10-04 09:14:06,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-10-04 09:14:06,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-10-04 09:14:06,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-10-04 09:14:06,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 173 transitions. [2018-10-04 09:14:06,533 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 173 transitions. Word has length 168 [2018-10-04 09:14:06,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:14:06,533 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 173 transitions. [2018-10-04 09:14:06,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-10-04 09:14:06,533 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 173 transitions. [2018-10-04 09:14:06,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-10-04 09:14:06,534 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:14:06,534 INFO L375 BasicCegarLoop]: trace histogram [78, 77, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:14:06,534 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:14:06,534 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:14:06,534 INFO L82 PathProgramCache]: Analyzing trace with hash -799880032, now seen corresponding path program 76 times [2018-10-04 09:14:06,535 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:14:06,535 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:14:06,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:06,535 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:14:06,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:06,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:08,756 INFO L134 CoverageAnalysis]: Checked inductivity of 6024 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:14:08,756 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:14:08,756 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:14:08,763 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:14:08,873 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:14:08,873 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:14:08,877 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:14:08,906 INFO L134 CoverageAnalysis]: Checked inductivity of 6024 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:14:08,926 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:14:08,926 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-10-04 09:14:08,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-04 09:14:08,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-04 09:14:08,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-10-04 09:14:08,928 INFO L87 Difference]: Start difference. First operand 171 states and 173 transitions. Second operand 80 states. [2018-10-04 09:14:09,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:14:09,125 INFO L93 Difference]: Finished difference Result 187 states and 191 transitions. [2018-10-04 09:14:09,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-04 09:14:09,125 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 170 [2018-10-04 09:14:09,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:14:09,127 INFO L225 Difference]: With dead ends: 187 [2018-10-04 09:14:09,127 INFO L226 Difference]: Without dead ends: 173 [2018-10-04 09:14:09,128 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-10-04 09:14:09,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-10-04 09:14:09,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-10-04 09:14:09,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-10-04 09:14:09,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 175 transitions. [2018-10-04 09:14:09,135 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 175 transitions. Word has length 170 [2018-10-04 09:14:09,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:14:09,136 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 175 transitions. [2018-10-04 09:14:09,136 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-04 09:14:09,136 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 175 transitions. [2018-10-04 09:14:09,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-10-04 09:14:09,137 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:14:09,137 INFO L375 BasicCegarLoop]: trace histogram [79, 78, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:14:09,137 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:14:09,137 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:14:09,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1721269404, now seen corresponding path program 77 times [2018-10-04 09:14:09,138 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:14:09,138 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:14:09,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:09,138 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:14:09,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:09,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:11,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6180 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:14:11,379 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:14:11,379 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 [2018-10-04 09:14:11,386 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:14:11,602 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 79 check-sat command(s) [2018-10-04 09:14:11,602 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:14:11,606 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:14:11,635 INFO L134 CoverageAnalysis]: Checked inductivity of 6180 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:14:11,657 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:14:11,657 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-10-04 09:14:11,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-10-04 09:14:11,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-10-04 09:14:11,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-10-04 09:14:11,658 INFO L87 Difference]: Start difference. First operand 173 states and 175 transitions. Second operand 81 states. [2018-10-04 09:14:11,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:14:11,852 INFO L93 Difference]: Finished difference Result 189 states and 193 transitions. [2018-10-04 09:14:11,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-04 09:14:11,852 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 172 [2018-10-04 09:14:11,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:14:11,853 INFO L225 Difference]: With dead ends: 189 [2018-10-04 09:14:11,853 INFO L226 Difference]: Without dead ends: 175 [2018-10-04 09:14:11,854 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-10-04 09:14:11,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-10-04 09:14:11,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-10-04 09:14:11,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-10-04 09:14:11,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 177 transitions. [2018-10-04 09:14:11,860 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 177 transitions. Word has length 172 [2018-10-04 09:14:11,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:14:11,861 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 177 transitions. [2018-10-04 09:14:11,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-10-04 09:14:11,861 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 177 transitions. [2018-10-04 09:14:11,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-10-04 09:14:11,862 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:14:11,862 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:14:11,862 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:14:11,862 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:14:11,862 INFO L82 PathProgramCache]: Analyzing trace with hash -2110644840, now seen corresponding path program 78 times [2018-10-04 09:14:11,863 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:14:11,863 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:14:11,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:11,863 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:14:11,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:11,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:14,364 INFO L134 CoverageAnalysis]: Checked inductivity of 6338 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:14:14,364 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:14:14,364 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:14:14,371 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:14:14,601 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 80 check-sat command(s) [2018-10-04 09:14:14,601 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:14:14,605 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:14:14,638 INFO L134 CoverageAnalysis]: Checked inductivity of 6338 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:14:14,658 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:14:14,659 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-10-04 09:14:14,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-04 09:14:14,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-04 09:14:14,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-10-04 09:14:14,660 INFO L87 Difference]: Start difference. First operand 175 states and 177 transitions. Second operand 82 states. [2018-10-04 09:14:14,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:14:14,987 INFO L93 Difference]: Finished difference Result 191 states and 195 transitions. [2018-10-04 09:14:14,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-04 09:14:14,988 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 174 [2018-10-04 09:14:14,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:14:14,989 INFO L225 Difference]: With dead ends: 191 [2018-10-04 09:14:14,989 INFO L226 Difference]: Without dead ends: 177 [2018-10-04 09:14:14,989 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-10-04 09:14:14,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-10-04 09:14:14,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2018-10-04 09:14:14,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-10-04 09:14:14,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 179 transitions. [2018-10-04 09:14:14,994 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 179 transitions. Word has length 174 [2018-10-04 09:14:14,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:14:14,995 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 179 transitions. [2018-10-04 09:14:14,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-04 09:14:14,995 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 179 transitions. [2018-10-04 09:14:14,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-10-04 09:14:14,995 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:14:14,995 INFO L375 BasicCegarLoop]: trace histogram [81, 80, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:14:14,996 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:14:14,996 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:14:14,996 INFO L82 PathProgramCache]: Analyzing trace with hash 501706644, now seen corresponding path program 79 times [2018-10-04 09:14:14,996 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:14:14,996 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:14:14,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:14,997 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:14:14,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:15,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:17,332 INFO L134 CoverageAnalysis]: Checked inductivity of 6498 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:14:17,332 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:14:17,332 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 [2018-10-04 09:14:17,339 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:14:17,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:17,452 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:14:17,483 INFO L134 CoverageAnalysis]: Checked inductivity of 6498 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:14:17,503 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:14:17,503 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-10-04 09:14:17,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-04 09:14:17,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-04 09:14:17,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-10-04 09:14:17,505 INFO L87 Difference]: Start difference. First operand 177 states and 179 transitions. Second operand 83 states. [2018-10-04 09:14:17,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:14:17,717 INFO L93 Difference]: Finished difference Result 193 states and 197 transitions. [2018-10-04 09:14:17,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-04 09:14:17,717 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 176 [2018-10-04 09:14:17,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:14:17,719 INFO L225 Difference]: With dead ends: 193 [2018-10-04 09:14:17,719 INFO L226 Difference]: Without dead ends: 179 [2018-10-04 09:14:17,720 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-10-04 09:14:17,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-10-04 09:14:17,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-10-04 09:14:17,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-10-04 09:14:17,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 181 transitions. [2018-10-04 09:14:17,725 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 181 transitions. Word has length 176 [2018-10-04 09:14:17,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:14:17,725 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 181 transitions. [2018-10-04 09:14:17,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-04 09:14:17,725 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 181 transitions. [2018-10-04 09:14:17,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-10-04 09:14:17,726 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:14:17,726 INFO L375 BasicCegarLoop]: trace histogram [82, 81, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:14:17,726 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:14:17,726 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:14:17,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1584385392, now seen corresponding path program 80 times [2018-10-04 09:14:17,727 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:14:17,727 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:14:17,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:17,727 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:14:17,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:17,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:20,429 INFO L134 CoverageAnalysis]: Checked inductivity of 6660 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:14:20,429 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:14:20,430 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 [2018-10-04 09:14:20,437 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:14:20,546 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:14:20,547 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:14:20,551 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:14:20,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6660 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:14:20,604 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:14:20,604 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-10-04 09:14:20,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-04 09:14:20,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-04 09:14:20,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-10-04 09:14:20,606 INFO L87 Difference]: Start difference. First operand 179 states and 181 transitions. Second operand 84 states. [2018-10-04 09:14:20,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:14:20,926 INFO L93 Difference]: Finished difference Result 195 states and 199 transitions. [2018-10-04 09:14:20,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-10-04 09:14:20,926 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 178 [2018-10-04 09:14:20,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:14:20,927 INFO L225 Difference]: With dead ends: 195 [2018-10-04 09:14:20,927 INFO L226 Difference]: Without dead ends: 181 [2018-10-04 09:14:20,928 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-10-04 09:14:20,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-10-04 09:14:20,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-10-04 09:14:20,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-10-04 09:14:20,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 183 transitions. [2018-10-04 09:14:20,933 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 183 transitions. Word has length 178 [2018-10-04 09:14:20,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:14:20,933 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 183 transitions. [2018-10-04 09:14:20,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-04 09:14:20,933 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 183 transitions. [2018-10-04 09:14:20,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-10-04 09:14:20,934 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:14:20,934 INFO L375 BasicCegarLoop]: trace histogram [83, 82, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:14:20,934 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:14:20,935 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:14:20,935 INFO L82 PathProgramCache]: Analyzing trace with hash -569104756, now seen corresponding path program 81 times [2018-10-04 09:14:20,935 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:14:20,935 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:14:20,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:20,936 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:14:20,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:20,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:23,400 INFO L134 CoverageAnalysis]: Checked inductivity of 6824 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:14:23,400 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:14:23,400 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:14:23,409 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:14:23,661 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 83 check-sat command(s) [2018-10-04 09:14:23,661 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:14:23,665 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:14:23,704 INFO L134 CoverageAnalysis]: Checked inductivity of 6824 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:14:23,737 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:14:23,737 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-10-04 09:14:23,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-10-04 09:14:23,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-10-04 09:14:23,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-10-04 09:14:23,739 INFO L87 Difference]: Start difference. First operand 181 states and 183 transitions. Second operand 85 states. [2018-10-04 09:14:24,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:14:24,037 INFO L93 Difference]: Finished difference Result 197 states and 201 transitions. [2018-10-04 09:14:24,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-10-04 09:14:24,037 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 180 [2018-10-04 09:14:24,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:14:24,038 INFO L225 Difference]: With dead ends: 197 [2018-10-04 09:14:24,038 INFO L226 Difference]: Without dead ends: 183 [2018-10-04 09:14:24,039 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-10-04 09:14:24,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-10-04 09:14:24,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2018-10-04 09:14:24,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-10-04 09:14:24,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 185 transitions. [2018-10-04 09:14:24,059 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 185 transitions. Word has length 180 [2018-10-04 09:14:24,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:14:24,059 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 185 transitions. [2018-10-04 09:14:24,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-10-04 09:14:24,060 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 185 transitions. [2018-10-04 09:14:24,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-10-04 09:14:24,060 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:14:24,061 INFO L375 BasicCegarLoop]: trace histogram [84, 83, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:14:24,061 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:14:24,061 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:14:24,061 INFO L82 PathProgramCache]: Analyzing trace with hash 158010248, now seen corresponding path program 82 times [2018-10-04 09:14:24,061 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:14:24,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:14:24,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:24,062 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:14:24,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:24,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:26,844 INFO L134 CoverageAnalysis]: Checked inductivity of 6990 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:14:26,844 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:14:26,844 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:14:26,852 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:14:26,968 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:14:26,969 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:14:26,972 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:14:27,004 INFO L134 CoverageAnalysis]: Checked inductivity of 6990 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:14:27,024 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:14:27,025 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-10-04 09:14:27,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-04 09:14:27,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-04 09:14:27,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-10-04 09:14:27,027 INFO L87 Difference]: Start difference. First operand 183 states and 185 transitions. Second operand 86 states. [2018-10-04 09:14:27,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:14:27,278 INFO L93 Difference]: Finished difference Result 199 states and 203 transitions. [2018-10-04 09:14:27,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-04 09:14:27,278 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 182 [2018-10-04 09:14:27,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:14:27,280 INFO L225 Difference]: With dead ends: 199 [2018-10-04 09:14:27,280 INFO L226 Difference]: Without dead ends: 185 [2018-10-04 09:14:27,281 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-10-04 09:14:27,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-10-04 09:14:27,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2018-10-04 09:14:27,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-10-04 09:14:27,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 187 transitions. [2018-10-04 09:14:27,287 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 187 transitions. Word has length 182 [2018-10-04 09:14:27,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:14:27,288 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 187 transitions. [2018-10-04 09:14:27,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-04 09:14:27,288 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 187 transitions. [2018-10-04 09:14:27,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-10-04 09:14:27,289 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:14:27,289 INFO L375 BasicCegarLoop]: trace histogram [85, 84, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:14:27,290 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:14:27,290 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:14:27,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1164140156, now seen corresponding path program 83 times [2018-10-04 09:14:27,290 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:14:27,291 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:14:27,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:27,292 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:14:27,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:27,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:30,274 INFO L134 CoverageAnalysis]: Checked inductivity of 7158 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:14:30,274 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:14:30,274 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 [2018-10-04 09:14:30,282 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:14:30,526 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 85 check-sat command(s) [2018-10-04 09:14:30,526 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:14:30,530 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:14:30,562 INFO L134 CoverageAnalysis]: Checked inductivity of 7158 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:14:30,583 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:14:30,583 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-10-04 09:14:30,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-10-04 09:14:30,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-10-04 09:14:30,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-10-04 09:14:30,585 INFO L87 Difference]: Start difference. First operand 185 states and 187 transitions. Second operand 87 states. [2018-10-04 09:14:30,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:14:30,947 INFO L93 Difference]: Finished difference Result 201 states and 205 transitions. [2018-10-04 09:14:30,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-10-04 09:14:30,947 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 184 [2018-10-04 09:14:30,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:14:30,948 INFO L225 Difference]: With dead ends: 201 [2018-10-04 09:14:30,948 INFO L226 Difference]: Without dead ends: 187 [2018-10-04 09:14:30,949 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-10-04 09:14:30,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-10-04 09:14:30,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-10-04 09:14:30,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-10-04 09:14:30,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 189 transitions. [2018-10-04 09:14:30,956 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 189 transitions. Word has length 184 [2018-10-04 09:14:30,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:14:30,956 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 189 transitions. [2018-10-04 09:14:30,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-10-04 09:14:30,956 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 189 transitions. [2018-10-04 09:14:30,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-10-04 09:14:30,957 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:14:30,957 INFO L375 BasicCegarLoop]: trace histogram [86, 85, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:14:30,957 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:14:30,958 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:14:30,958 INFO L82 PathProgramCache]: Analyzing trace with hash -440358784, now seen corresponding path program 84 times [2018-10-04 09:14:30,958 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:14:30,958 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:14:30,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:30,959 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:14:30,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:31,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:33,660 INFO L134 CoverageAnalysis]: Checked inductivity of 7328 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:14:33,660 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:14:33,660 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 [2018-10-04 09:14:33,668 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:14:33,918 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 86 check-sat command(s) [2018-10-04 09:14:33,918 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:14:33,923 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:14:33,955 INFO L134 CoverageAnalysis]: Checked inductivity of 7328 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:14:33,976 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:14:33,976 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-10-04 09:14:33,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-04 09:14:33,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-04 09:14:33,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-10-04 09:14:33,977 INFO L87 Difference]: Start difference. First operand 187 states and 189 transitions. Second operand 88 states. [2018-10-04 09:14:34,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:14:34,292 INFO L93 Difference]: Finished difference Result 203 states and 207 transitions. [2018-10-04 09:14:34,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-04 09:14:34,293 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 186 [2018-10-04 09:14:34,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:14:34,293 INFO L225 Difference]: With dead ends: 203 [2018-10-04 09:14:34,294 INFO L226 Difference]: Without dead ends: 189 [2018-10-04 09:14:34,294 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-10-04 09:14:34,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-10-04 09:14:34,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2018-10-04 09:14:34,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-10-04 09:14:34,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 191 transitions. [2018-10-04 09:14:34,301 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 191 transitions. Word has length 186 [2018-10-04 09:14:34,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:14:34,301 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 191 transitions. [2018-10-04 09:14:34,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-04 09:14:34,302 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 191 transitions. [2018-10-04 09:14:34,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-10-04 09:14:34,303 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:14:34,303 INFO L375 BasicCegarLoop]: trace histogram [87, 86, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:14:34,303 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:14:34,303 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:14:34,303 INFO L82 PathProgramCache]: Analyzing trace with hash -671162244, now seen corresponding path program 85 times [2018-10-04 09:14:34,303 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:14:34,304 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:14:34,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:34,304 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:14:34,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:34,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:37,211 INFO L134 CoverageAnalysis]: Checked inductivity of 7500 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:14:37,211 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:14:37,211 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:14:37,219 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:14:37,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:37,343 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:14:37,376 INFO L134 CoverageAnalysis]: Checked inductivity of 7500 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:14:37,397 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:14:37,397 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-10-04 09:14:37,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-10-04 09:14:37,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-10-04 09:14:37,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-10-04 09:14:37,399 INFO L87 Difference]: Start difference. First operand 189 states and 191 transitions. Second operand 89 states. [2018-10-04 09:14:37,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:14:37,651 INFO L93 Difference]: Finished difference Result 205 states and 209 transitions. [2018-10-04 09:14:37,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-10-04 09:14:37,652 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 188 [2018-10-04 09:14:37,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:14:37,653 INFO L225 Difference]: With dead ends: 205 [2018-10-04 09:14:37,653 INFO L226 Difference]: Without dead ends: 191 [2018-10-04 09:14:37,654 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-10-04 09:14:37,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-10-04 09:14:37,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-10-04 09:14:37,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-10-04 09:14:37,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 193 transitions. [2018-10-04 09:14:37,662 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 193 transitions. Word has length 188 [2018-10-04 09:14:37,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:14:37,662 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 193 transitions. [2018-10-04 09:14:37,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-10-04 09:14:37,662 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 193 transitions. [2018-10-04 09:14:37,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-10-04 09:14:37,663 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:14:37,663 INFO L375 BasicCegarLoop]: trace histogram [88, 87, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:14:37,664 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:14:37,664 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:14:37,664 INFO L82 PathProgramCache]: Analyzing trace with hash 865012088, now seen corresponding path program 86 times [2018-10-04 09:14:37,664 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:14:37,664 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:14:37,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:37,665 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:14:37,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:37,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:40,766 INFO L134 CoverageAnalysis]: Checked inductivity of 7674 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:14:40,766 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:14:40,766 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 [2018-10-04 09:14:40,775 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:14:40,894 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:14:40,894 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:14:40,899 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:14:40,933 INFO L134 CoverageAnalysis]: Checked inductivity of 7674 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:14:40,953 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:14:40,953 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-10-04 09:14:40,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-04 09:14:40,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-04 09:14:40,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-10-04 09:14:40,954 INFO L87 Difference]: Start difference. First operand 191 states and 193 transitions. Second operand 90 states. [2018-10-04 09:14:41,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:14:41,124 INFO L93 Difference]: Finished difference Result 207 states and 211 transitions. [2018-10-04 09:14:41,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-04 09:14:41,125 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 190 [2018-10-04 09:14:41,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:14:41,126 INFO L225 Difference]: With dead ends: 207 [2018-10-04 09:14:41,126 INFO L226 Difference]: Without dead ends: 193 [2018-10-04 09:14:41,126 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-10-04 09:14:41,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-10-04 09:14:41,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2018-10-04 09:14:41,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-10-04 09:14:41,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 195 transitions. [2018-10-04 09:14:41,132 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 195 transitions. Word has length 190 [2018-10-04 09:14:41,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:14:41,132 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 195 transitions. [2018-10-04 09:14:41,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-04 09:14:41,132 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 195 transitions. [2018-10-04 09:14:41,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-10-04 09:14:41,133 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:14:41,133 INFO L375 BasicCegarLoop]: trace histogram [89, 88, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:14:41,133 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:14:41,133 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:14:41,133 INFO L82 PathProgramCache]: Analyzing trace with hash -340204684, now seen corresponding path program 87 times [2018-10-04 09:14:41,133 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:14:41,134 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:14:41,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:41,134 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:14:41,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:41,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:44,028 INFO L134 CoverageAnalysis]: Checked inductivity of 7850 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:14:44,028 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:14:44,028 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 [2018-10-04 09:14:44,035 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:14:44,343 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 89 check-sat command(s) [2018-10-04 09:14:44,343 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:14:44,347 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:14:44,381 INFO L134 CoverageAnalysis]: Checked inductivity of 7850 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:14:44,402 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:14:44,402 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-10-04 09:14:44,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-10-04 09:14:44,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-10-04 09:14:44,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-10-04 09:14:44,404 INFO L87 Difference]: Start difference. First operand 193 states and 195 transitions. Second operand 91 states. [2018-10-04 09:14:44,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:14:44,747 INFO L93 Difference]: Finished difference Result 209 states and 213 transitions. [2018-10-04 09:14:44,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-10-04 09:14:44,747 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 192 [2018-10-04 09:14:44,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:14:44,748 INFO L225 Difference]: With dead ends: 209 [2018-10-04 09:14:44,748 INFO L226 Difference]: Without dead ends: 195 [2018-10-04 09:14:44,749 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-10-04 09:14:44,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-10-04 09:14:44,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2018-10-04 09:14:44,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-10-04 09:14:44,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 197 transitions. [2018-10-04 09:14:44,755 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 197 transitions. Word has length 192 [2018-10-04 09:14:44,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:14:44,755 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 197 transitions. [2018-10-04 09:14:44,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-10-04 09:14:44,755 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 197 transitions. [2018-10-04 09:14:44,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-10-04 09:14:44,756 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:14:44,756 INFO L375 BasicCegarLoop]: trace histogram [90, 89, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:14:44,756 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:14:44,756 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:14:44,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1087647344, now seen corresponding path program 88 times [2018-10-04 09:14:44,757 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:14:44,757 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:14:44,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:44,758 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:14:44,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:44,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:47,842 INFO L134 CoverageAnalysis]: Checked inductivity of 8028 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:14:47,842 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:14:47,842 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 [2018-10-04 09:14:47,849 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:14:47,975 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:14:47,975 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:14:47,979 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:14:48,031 INFO L134 CoverageAnalysis]: Checked inductivity of 8028 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:14:48,051 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:14:48,051 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-10-04 09:14:48,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-04 09:14:48,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-04 09:14:48,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-10-04 09:14:48,052 INFO L87 Difference]: Start difference. First operand 195 states and 197 transitions. Second operand 92 states. [2018-10-04 09:14:48,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:14:48,299 INFO L93 Difference]: Finished difference Result 211 states and 215 transitions. [2018-10-04 09:14:48,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-10-04 09:14:48,299 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 194 [2018-10-04 09:14:48,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:14:48,301 INFO L225 Difference]: With dead ends: 211 [2018-10-04 09:14:48,301 INFO L226 Difference]: Without dead ends: 197 [2018-10-04 09:14:48,302 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-10-04 09:14:48,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-10-04 09:14:48,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2018-10-04 09:14:48,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-10-04 09:14:48,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 199 transitions. [2018-10-04 09:14:48,309 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 199 transitions. Word has length 194 [2018-10-04 09:14:48,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:14:48,310 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 199 transitions. [2018-10-04 09:14:48,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-04 09:14:48,310 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 199 transitions. [2018-10-04 09:14:48,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-10-04 09:14:48,311 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:14:48,311 INFO L375 BasicCegarLoop]: trace histogram [91, 90, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:14:48,311 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:14:48,311 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:14:48,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1136088468, now seen corresponding path program 89 times [2018-10-04 09:14:48,312 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:14:48,312 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:14:48,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:48,312 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:14:48,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:48,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:51,577 INFO L134 CoverageAnalysis]: Checked inductivity of 8208 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:14:51,578 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:14:51,578 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 [2018-10-04 09:14:51,587 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:14:51,888 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 91 check-sat command(s) [2018-10-04 09:14:51,888 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:14:51,894 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:14:51,929 INFO L134 CoverageAnalysis]: Checked inductivity of 8208 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:14:51,950 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:14:51,950 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-10-04 09:14:51,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-10-04 09:14:51,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-10-04 09:14:51,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-10-04 09:14:51,951 INFO L87 Difference]: Start difference. First operand 197 states and 199 transitions. Second operand 93 states. [2018-10-04 09:14:52,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:14:52,298 INFO L93 Difference]: Finished difference Result 213 states and 217 transitions. [2018-10-04 09:14:52,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-10-04 09:14:52,299 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 196 [2018-10-04 09:14:52,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:14:52,300 INFO L225 Difference]: With dead ends: 213 [2018-10-04 09:14:52,300 INFO L226 Difference]: Without dead ends: 199 [2018-10-04 09:14:52,300 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-10-04 09:14:52,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-10-04 09:14:52,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2018-10-04 09:14:52,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-10-04 09:14:52,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 201 transitions. [2018-10-04 09:14:52,306 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 201 transitions. Word has length 196 [2018-10-04 09:14:52,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:14:52,306 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 201 transitions. [2018-10-04 09:14:52,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-10-04 09:14:52,306 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 201 transitions. [2018-10-04 09:14:52,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-10-04 09:14:52,307 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:14:52,307 INFO L375 BasicCegarLoop]: trace histogram [92, 91, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:14:52,307 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:14:52,307 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:14:52,307 INFO L82 PathProgramCache]: Analyzing trace with hash 747509608, now seen corresponding path program 90 times [2018-10-04 09:14:52,308 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:14:52,308 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:14:52,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:52,309 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:14:52,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:52,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:55,589 INFO L134 CoverageAnalysis]: Checked inductivity of 8390 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:14:55,590 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:14:55,590 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:14:55,597 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:14:55,883 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 92 check-sat command(s) [2018-10-04 09:14:55,883 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:14:55,891 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:14:55,927 INFO L134 CoverageAnalysis]: Checked inductivity of 8390 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:14:55,947 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:14:55,948 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-10-04 09:14:55,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-10-04 09:14:55,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-10-04 09:14:55,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-10-04 09:14:55,949 INFO L87 Difference]: Start difference. First operand 199 states and 201 transitions. Second operand 94 states. [2018-10-04 09:14:56,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:14:56,141 INFO L93 Difference]: Finished difference Result 215 states and 219 transitions. [2018-10-04 09:14:56,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-10-04 09:14:56,142 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 198 [2018-10-04 09:14:56,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:14:56,143 INFO L225 Difference]: With dead ends: 215 [2018-10-04 09:14:56,143 INFO L226 Difference]: Without dead ends: 201 [2018-10-04 09:14:56,144 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-10-04 09:14:56,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-10-04 09:14:56,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2018-10-04 09:14:56,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-10-04 09:14:56,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 203 transitions. [2018-10-04 09:14:56,149 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 203 transitions. Word has length 198 [2018-10-04 09:14:56,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:14:56,149 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 203 transitions. [2018-10-04 09:14:56,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-10-04 09:14:56,149 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 203 transitions. [2018-10-04 09:14:56,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-10-04 09:14:56,150 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:14:56,150 INFO L375 BasicCegarLoop]: trace histogram [93, 92, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:14:56,150 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:14:56,151 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:14:56,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1590938268, now seen corresponding path program 91 times [2018-10-04 09:14:56,151 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:14:56,151 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:14:56,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:56,151 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:14:56,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:56,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:59,234 INFO L134 CoverageAnalysis]: Checked inductivity of 8574 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:14:59,234 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:14:59,234 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:14:59,242 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:14:59,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:59,372 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:14:59,406 INFO L134 CoverageAnalysis]: Checked inductivity of 8574 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:14:59,425 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:14:59,426 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-10-04 09:14:59,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-10-04 09:14:59,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-10-04 09:14:59,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-10-04 09:14:59,427 INFO L87 Difference]: Start difference. First operand 201 states and 203 transitions. Second operand 95 states. [2018-10-04 09:14:59,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:14:59,665 INFO L93 Difference]: Finished difference Result 217 states and 221 transitions. [2018-10-04 09:14:59,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-10-04 09:14:59,667 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 200 [2018-10-04 09:14:59,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:14:59,668 INFO L225 Difference]: With dead ends: 217 [2018-10-04 09:14:59,668 INFO L226 Difference]: Without dead ends: 203 [2018-10-04 09:14:59,668 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-10-04 09:14:59,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-10-04 09:14:59,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2018-10-04 09:14:59,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-10-04 09:14:59,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 205 transitions. [2018-10-04 09:14:59,675 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 205 transitions. Word has length 200 [2018-10-04 09:14:59,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:14:59,675 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 205 transitions. [2018-10-04 09:14:59,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-10-04 09:14:59,675 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 205 transitions. [2018-10-04 09:14:59,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-10-04 09:14:59,676 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:14:59,676 INFO L375 BasicCegarLoop]: trace histogram [94, 93, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:14:59,676 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:14:59,677 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:14:59,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1723516000, now seen corresponding path program 92 times [2018-10-04 09:14:59,677 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:14:59,677 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:14:59,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:59,678 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:14:59,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:59,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:03,744 INFO L134 CoverageAnalysis]: Checked inductivity of 8760 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:15:03,745 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:15:03,745 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 [2018-10-04 09:15:03,754 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:15:03,880 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:15:03,881 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:15:03,885 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:15:03,922 INFO L134 CoverageAnalysis]: Checked inductivity of 8760 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:15:03,943 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:15:03,943 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-10-04 09:15:03,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-04 09:15:03,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-04 09:15:03,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-10-04 09:15:03,945 INFO L87 Difference]: Start difference. First operand 203 states and 205 transitions. Second operand 96 states. [2018-10-04 09:15:04,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:15:04,202 INFO L93 Difference]: Finished difference Result 219 states and 223 transitions. [2018-10-04 09:15:04,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-04 09:15:04,202 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 202 [2018-10-04 09:15:04,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:15:04,204 INFO L225 Difference]: With dead ends: 219 [2018-10-04 09:15:04,204 INFO L226 Difference]: Without dead ends: 205 [2018-10-04 09:15:04,205 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-10-04 09:15:04,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2018-10-04 09:15:04,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2018-10-04 09:15:04,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-10-04 09:15:04,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 207 transitions. [2018-10-04 09:15:04,213 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 207 transitions. Word has length 202 [2018-10-04 09:15:04,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:15:04,214 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 207 transitions. [2018-10-04 09:15:04,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-04 09:15:04,214 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 207 transitions. [2018-10-04 09:15:04,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-10-04 09:15:04,215 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:15:04,215 INFO L375 BasicCegarLoop]: trace histogram [95, 94, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:15:04,215 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:15:04,215 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:15:04,216 INFO L82 PathProgramCache]: Analyzing trace with hash 48333916, now seen corresponding path program 93 times [2018-10-04 09:15:04,216 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:15:04,216 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:15:04,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:04,216 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:15:04,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:04,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:07,809 INFO L134 CoverageAnalysis]: Checked inductivity of 8948 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:15:07,809 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:15:07,809 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 [2018-10-04 09:15:07,817 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:15:08,131 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 95 check-sat command(s) [2018-10-04 09:15:08,131 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:15:08,136 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:15:08,187 INFO L134 CoverageAnalysis]: Checked inductivity of 8948 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:15:08,212 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:15:08,212 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-10-04 09:15:08,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-10-04 09:15:08,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-10-04 09:15:08,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-10-04 09:15:08,214 INFO L87 Difference]: Start difference. First operand 205 states and 207 transitions. Second operand 97 states. [2018-10-04 09:15:08,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:15:08,457 INFO L93 Difference]: Finished difference Result 221 states and 225 transitions. [2018-10-04 09:15:08,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-10-04 09:15:08,457 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 204 [2018-10-04 09:15:08,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:15:08,458 INFO L225 Difference]: With dead ends: 221 [2018-10-04 09:15:08,458 INFO L226 Difference]: Without dead ends: 207 [2018-10-04 09:15:08,459 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-10-04 09:15:08,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-10-04 09:15:08,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2018-10-04 09:15:08,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2018-10-04 09:15:08,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 209 transitions. [2018-10-04 09:15:08,464 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 209 transitions. Word has length 204 [2018-10-04 09:15:08,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:15:08,464 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 209 transitions. [2018-10-04 09:15:08,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-10-04 09:15:08,465 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 209 transitions. [2018-10-04 09:15:08,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-10-04 09:15:08,465 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:15:08,466 INFO L375 BasicCegarLoop]: trace histogram [96, 95, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:15:08,466 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:15:08,466 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:15:08,466 INFO L82 PathProgramCache]: Analyzing trace with hash 811087192, now seen corresponding path program 94 times [2018-10-04 09:15:08,466 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:15:08,466 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:15:08,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:08,467 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:15:08,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:08,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:12,059 INFO L134 CoverageAnalysis]: Checked inductivity of 9138 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:15:12,059 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:15:12,059 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 [2018-10-04 09:15:12,068 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:15:12,210 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:15:12,210 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:15:12,214 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:15:12,252 INFO L134 CoverageAnalysis]: Checked inductivity of 9138 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:15:12,272 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:15:12,273 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-10-04 09:15:12,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-10-04 09:15:12,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-10-04 09:15:12,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-10-04 09:15:12,274 INFO L87 Difference]: Start difference. First operand 207 states and 209 transitions. Second operand 98 states. [2018-10-04 09:15:12,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:15:12,487 INFO L93 Difference]: Finished difference Result 223 states and 227 transitions. [2018-10-04 09:15:12,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-10-04 09:15:12,488 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 206 [2018-10-04 09:15:12,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:15:12,489 INFO L225 Difference]: With dead ends: 223 [2018-10-04 09:15:12,490 INFO L226 Difference]: Without dead ends: 209 [2018-10-04 09:15:12,490 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-10-04 09:15:12,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-10-04 09:15:12,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2018-10-04 09:15:12,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-10-04 09:15:12,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 211 transitions. [2018-10-04 09:15:12,496 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 211 transitions. Word has length 206 [2018-10-04 09:15:12,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:15:12,497 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 211 transitions. [2018-10-04 09:15:12,497 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-10-04 09:15:12,497 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 211 transitions. [2018-10-04 09:15:12,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-10-04 09:15:12,497 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:15:12,497 INFO L375 BasicCegarLoop]: trace histogram [97, 96, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:15:12,498 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:15:12,498 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:15:12,498 INFO L82 PathProgramCache]: Analyzing trace with hash -622422188, now seen corresponding path program 95 times [2018-10-04 09:15:12,498 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:15:12,498 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:15:12,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:12,499 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:15:12,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:12,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:16,091 INFO L134 CoverageAnalysis]: Checked inductivity of 9330 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:15:16,091 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:15:16,091 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 [2018-10-04 09:15:16,098 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:15:16,405 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 97 check-sat command(s) [2018-10-04 09:15:16,405 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:15:16,410 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:15:16,449 INFO L134 CoverageAnalysis]: Checked inductivity of 9330 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:15:16,470 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:15:16,470 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-10-04 09:15:16,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-10-04 09:15:16,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-10-04 09:15:16,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-10-04 09:15:16,471 INFO L87 Difference]: Start difference. First operand 209 states and 211 transitions. Second operand 99 states. [2018-10-04 09:15:16,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:15:16,856 INFO L93 Difference]: Finished difference Result 225 states and 229 transitions. [2018-10-04 09:15:16,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-10-04 09:15:16,856 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 208 [2018-10-04 09:15:16,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:15:16,857 INFO L225 Difference]: With dead ends: 225 [2018-10-04 09:15:16,857 INFO L226 Difference]: Without dead ends: 211 [2018-10-04 09:15:16,858 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-10-04 09:15:16,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-10-04 09:15:16,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2018-10-04 09:15:16,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-10-04 09:15:16,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 213 transitions. [2018-10-04 09:15:16,864 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 213 transitions. Word has length 208 [2018-10-04 09:15:16,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:15:16,864 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 213 transitions. [2018-10-04 09:15:16,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-10-04 09:15:16,864 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 213 transitions. [2018-10-04 09:15:16,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-10-04 09:15:16,865 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:15:16,865 INFO L375 BasicCegarLoop]: trace histogram [98, 97, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:15:16,865 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:15:16,865 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:15:16,865 INFO L82 PathProgramCache]: Analyzing trace with hash 459565648, now seen corresponding path program 96 times [2018-10-04 09:15:16,866 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:15:16,866 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:15:16,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:16,866 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:15:16,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:16,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:20,320 INFO L134 CoverageAnalysis]: Checked inductivity of 9524 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:15:20,321 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:15:20,321 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:15:20,328 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:15:20,644 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 98 check-sat command(s) [2018-10-04 09:15:20,645 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:15:20,650 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:15:20,689 INFO L134 CoverageAnalysis]: Checked inductivity of 9524 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:15:20,725 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:15:20,725 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-10-04 09:15:20,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-10-04 09:15:20,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-10-04 09:15:20,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-10-04 09:15:20,727 INFO L87 Difference]: Start difference. First operand 211 states and 213 transitions. Second operand 100 states. [2018-10-04 09:15:21,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:15:21,053 INFO L93 Difference]: Finished difference Result 227 states and 231 transitions. [2018-10-04 09:15:21,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-10-04 09:15:21,054 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 210 [2018-10-04 09:15:21,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:15:21,055 INFO L225 Difference]: With dead ends: 227 [2018-10-04 09:15:21,055 INFO L226 Difference]: Without dead ends: 213 [2018-10-04 09:15:21,055 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-10-04 09:15:21,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2018-10-04 09:15:21,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2018-10-04 09:15:21,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2018-10-04 09:15:21,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 215 transitions. [2018-10-04 09:15:21,062 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 215 transitions. Word has length 210 [2018-10-04 09:15:21,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:15:21,062 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 215 transitions. [2018-10-04 09:15:21,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-10-04 09:15:21,062 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 215 transitions. [2018-10-04 09:15:21,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-10-04 09:15:21,063 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:15:21,063 INFO L375 BasicCegarLoop]: trace histogram [99, 98, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:15:21,063 INFO L423 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:15:21,063 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:15:21,064 INFO L82 PathProgramCache]: Analyzing trace with hash 867790412, now seen corresponding path program 97 times [2018-10-04 09:15:21,064 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:15:21,064 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:15:21,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:21,064 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:15:21,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:21,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:24,557 INFO L134 CoverageAnalysis]: Checked inductivity of 9720 backedges. 0 proven. 9702 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:15:24,558 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:15:24,558 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 [2018-10-04 09:15:24,565 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:15:24,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:24,706 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:15:24,747 INFO L134 CoverageAnalysis]: Checked inductivity of 9720 backedges. 0 proven. 9702 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:15:24,767 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:15:24,768 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-10-04 09:15:24,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-10-04 09:15:24,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-10-04 09:15:24,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-10-04 09:15:24,770 INFO L87 Difference]: Start difference. First operand 213 states and 215 transitions. Second operand 101 states. [2018-10-04 09:15:25,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:15:25,090 INFO L93 Difference]: Finished difference Result 229 states and 233 transitions. [2018-10-04 09:15:25,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-10-04 09:15:25,091 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 212 [2018-10-04 09:15:25,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:15:25,092 INFO L225 Difference]: With dead ends: 229 [2018-10-04 09:15:25,092 INFO L226 Difference]: Without dead ends: 215 [2018-10-04 09:15:25,093 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-10-04 09:15:25,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2018-10-04 09:15:25,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2018-10-04 09:15:25,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2018-10-04 09:15:25,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 217 transitions. [2018-10-04 09:15:25,101 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 217 transitions. Word has length 212 [2018-10-04 09:15:25,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:15:25,101 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 217 transitions. [2018-10-04 09:15:25,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-10-04 09:15:25,101 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 217 transitions. [2018-10-04 09:15:25,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2018-10-04 09:15:25,102 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:15:25,102 INFO L375 BasicCegarLoop]: trace histogram [100, 99, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:15:25,102 INFO L423 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:15:25,102 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:15:25,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1965202616, now seen corresponding path program 98 times [2018-10-04 09:15:25,102 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:15:25,102 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:15:25,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:25,103 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:15:25,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:25,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:28,956 INFO L134 CoverageAnalysis]: Checked inductivity of 9918 backedges. 0 proven. 9900 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:15:28,957 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:15:28,957 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 [2018-10-04 09:15:28,985 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:15:29,132 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:15:29,132 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:15:29,140 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:15:29,190 INFO L134 CoverageAnalysis]: Checked inductivity of 9918 backedges. 0 proven. 9900 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:15:29,211 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:15:29,211 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-10-04 09:15:29,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-10-04 09:15:29,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-10-04 09:15:29,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-10-04 09:15:29,213 INFO L87 Difference]: Start difference. First operand 215 states and 217 transitions. Second operand 102 states. [2018-10-04 09:15:29,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:15:29,544 INFO L93 Difference]: Finished difference Result 231 states and 235 transitions. [2018-10-04 09:15:29,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-10-04 09:15:29,544 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 214 [2018-10-04 09:15:29,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:15:29,546 INFO L225 Difference]: With dead ends: 231 [2018-10-04 09:15:29,546 INFO L226 Difference]: Without dead ends: 217 [2018-10-04 09:15:29,547 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-10-04 09:15:29,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2018-10-04 09:15:29,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2018-10-04 09:15:29,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2018-10-04 09:15:29,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 219 transitions. [2018-10-04 09:15:29,558 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 219 transitions. Word has length 214 [2018-10-04 09:15:29,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:15:29,559 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 219 transitions. [2018-10-04 09:15:29,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-10-04 09:15:29,559 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 219 transitions. [2018-10-04 09:15:29,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2018-10-04 09:15:29,560 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:15:29,560 INFO L375 BasicCegarLoop]: trace histogram [101, 100, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:15:29,560 INFO L423 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:15:29,560 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:15:29,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1462236860, now seen corresponding path program 99 times [2018-10-04 09:15:29,561 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:15:29,561 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:15:29,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:29,561 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:15:29,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:29,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:33,477 INFO L134 CoverageAnalysis]: Checked inductivity of 10118 backedges. 0 proven. 10100 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:15:33,477 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:15:33,477 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 [2018-10-04 09:15:33,485 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:15:33,861 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 101 check-sat command(s) [2018-10-04 09:15:33,861 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:15:33,867 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:15:33,908 INFO L134 CoverageAnalysis]: Checked inductivity of 10118 backedges. 0 proven. 10100 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:15:33,929 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:15:33,929 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-10-04 09:15:33,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-10-04 09:15:33,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-10-04 09:15:33,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-10-04 09:15:33,931 INFO L87 Difference]: Start difference. First operand 217 states and 219 transitions. Second operand 103 states. [2018-10-04 09:15:34,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:15:34,384 INFO L93 Difference]: Finished difference Result 233 states and 237 transitions. [2018-10-04 09:15:34,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-10-04 09:15:34,385 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 216 [2018-10-04 09:15:34,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:15:34,385 INFO L225 Difference]: With dead ends: 233 [2018-10-04 09:15:34,386 INFO L226 Difference]: Without dead ends: 219 [2018-10-04 09:15:34,386 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-10-04 09:15:34,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-10-04 09:15:34,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2018-10-04 09:15:34,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-10-04 09:15:34,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 221 transitions. [2018-10-04 09:15:34,394 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 221 transitions. Word has length 216 [2018-10-04 09:15:34,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:15:34,394 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 221 transitions. [2018-10-04 09:15:34,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-10-04 09:15:34,394 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 221 transitions. [2018-10-04 09:15:34,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-10-04 09:15:34,395 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:15:34,395 INFO L375 BasicCegarLoop]: trace histogram [102, 101, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:15:34,395 INFO L423 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:15:34,395 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:15:34,395 INFO L82 PathProgramCache]: Analyzing trace with hash 851517504, now seen corresponding path program 100 times [2018-10-04 09:15:34,395 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:15:34,395 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:15:34,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:34,396 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:15:34,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:34,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:38,405 INFO L134 CoverageAnalysis]: Checked inductivity of 10320 backedges. 0 proven. 10302 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:15:38,406 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:15:38,406 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 [2018-10-04 09:15:38,414 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:15:38,578 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:15:38,578 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:15:38,582 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:15:38,635 INFO L134 CoverageAnalysis]: Checked inductivity of 10320 backedges. 0 proven. 10302 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:15:38,657 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:15:38,657 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-10-04 09:15:38,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-10-04 09:15:38,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-10-04 09:15:38,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-10-04 09:15:38,659 INFO L87 Difference]: Start difference. First operand 219 states and 221 transitions. Second operand 104 states. [2018-10-04 09:15:39,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:15:39,130 INFO L93 Difference]: Finished difference Result 235 states and 239 transitions. [2018-10-04 09:15:39,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-10-04 09:15:39,131 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 218 [2018-10-04 09:15:39,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:15:39,131 INFO L225 Difference]: With dead ends: 235 [2018-10-04 09:15:39,131 INFO L226 Difference]: Without dead ends: 221 [2018-10-04 09:15:39,132 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-10-04 09:15:39,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-10-04 09:15:39,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2018-10-04 09:15:39,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-10-04 09:15:39,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 223 transitions. [2018-10-04 09:15:39,139 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 223 transitions. Word has length 218 [2018-10-04 09:15:39,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:15:39,139 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 223 transitions. [2018-10-04 09:15:39,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-10-04 09:15:39,139 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 223 transitions. [2018-10-04 09:15:39,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2018-10-04 09:15:39,140 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:15:39,140 INFO L375 BasicCegarLoop]: trace histogram [103, 102, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:15:39,141 INFO L423 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:15:39,141 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:15:39,141 INFO L82 PathProgramCache]: Analyzing trace with hash -423598020, now seen corresponding path program 101 times [2018-10-04 09:15:39,141 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:15:39,141 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:15:39,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:39,142 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:15:39,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:39,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:43,313 INFO L134 CoverageAnalysis]: Checked inductivity of 10524 backedges. 0 proven. 10506 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:15:43,313 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:15:43,313 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:15:43,321 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:15:43,659 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 103 check-sat command(s) [2018-10-04 09:15:43,659 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:15:43,665 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:15:43,708 INFO L134 CoverageAnalysis]: Checked inductivity of 10524 backedges. 0 proven. 10506 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:15:43,728 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:15:43,728 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-10-04 09:15:43,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-10-04 09:15:43,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-10-04 09:15:43,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-10-04 09:15:43,730 INFO L87 Difference]: Start difference. First operand 221 states and 223 transitions. Second operand 105 states. [2018-10-04 09:15:44,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:15:44,205 INFO L93 Difference]: Finished difference Result 237 states and 241 transitions. [2018-10-04 09:15:44,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-10-04 09:15:44,205 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 220 [2018-10-04 09:15:44,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:15:44,206 INFO L225 Difference]: With dead ends: 237 [2018-10-04 09:15:44,206 INFO L226 Difference]: Without dead ends: 223 [2018-10-04 09:15:44,207 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-10-04 09:15:44,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-10-04 09:15:44,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2018-10-04 09:15:44,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2018-10-04 09:15:44,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 225 transitions. [2018-10-04 09:15:44,216 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 225 transitions. Word has length 220 [2018-10-04 09:15:44,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:15:44,216 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 225 transitions. [2018-10-04 09:15:44,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-10-04 09:15:44,216 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 225 transitions. [2018-10-04 09:15:44,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-10-04 09:15:44,217 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:15:44,217 INFO L375 BasicCegarLoop]: trace histogram [104, 103, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:15:44,217 INFO L423 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:15:44,217 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:15:44,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1743937224, now seen corresponding path program 102 times [2018-10-04 09:15:44,217 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:15:44,217 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:15:44,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:44,218 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:15:44,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:44,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:48,381 INFO L134 CoverageAnalysis]: Checked inductivity of 10730 backedges. 0 proven. 10712 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:15:48,381 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:15:48,381 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 [2018-10-04 09:15:48,388 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:15:48,729 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 104 check-sat command(s) [2018-10-04 09:15:48,729 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:15:48,736 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:15:48,804 INFO L134 CoverageAnalysis]: Checked inductivity of 10730 backedges. 0 proven. 10712 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:15:48,826 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:15:48,826 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-10-04 09:15:48,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-10-04 09:15:48,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-10-04 09:15:48,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-10-04 09:15:48,828 INFO L87 Difference]: Start difference. First operand 223 states and 225 transitions. Second operand 106 states. [2018-10-04 09:15:49,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:15:49,316 INFO L93 Difference]: Finished difference Result 239 states and 243 transitions. [2018-10-04 09:15:49,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-10-04 09:15:49,317 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 222 [2018-10-04 09:15:49,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:15:49,317 INFO L225 Difference]: With dead ends: 239 [2018-10-04 09:15:49,317 INFO L226 Difference]: Without dead ends: 225 [2018-10-04 09:15:49,318 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-10-04 09:15:49,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2018-10-04 09:15:49,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2018-10-04 09:15:49,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2018-10-04 09:15:49,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 227 transitions. [2018-10-04 09:15:49,325 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 227 transitions. Word has length 222 [2018-10-04 09:15:49,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:15:49,325 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 227 transitions. [2018-10-04 09:15:49,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-10-04 09:15:49,325 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 227 transitions. [2018-10-04 09:15:49,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2018-10-04 09:15:49,326 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:15:49,326 INFO L375 BasicCegarLoop]: trace histogram [105, 104, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:15:49,326 INFO L423 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:15:49,326 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:15:49,326 INFO L82 PathProgramCache]: Analyzing trace with hash 720407348, now seen corresponding path program 103 times [2018-10-04 09:15:49,326 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:15:49,326 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:15:49,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:49,327 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:15:49,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:49,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:53,645 INFO L134 CoverageAnalysis]: Checked inductivity of 10938 backedges. 0 proven. 10920 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:15:53,645 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:15:53,645 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 [2018-10-04 09:15:53,652 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:15:53,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:53,803 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:15:53,862 INFO L134 CoverageAnalysis]: Checked inductivity of 10938 backedges. 0 proven. 10920 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:15:53,882 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:15:53,882 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2018-10-04 09:15:53,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-10-04 09:15:53,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-10-04 09:15:53,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-10-04 09:15:53,884 INFO L87 Difference]: Start difference. First operand 225 states and 227 transitions. Second operand 107 states. [2018-10-04 09:15:54,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:15:54,187 INFO L93 Difference]: Finished difference Result 241 states and 245 transitions. [2018-10-04 09:15:54,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-10-04 09:15:54,188 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 224 [2018-10-04 09:15:54,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:15:54,189 INFO L225 Difference]: With dead ends: 241 [2018-10-04 09:15:54,189 INFO L226 Difference]: Without dead ends: 227 [2018-10-04 09:15:54,190 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-10-04 09:15:54,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2018-10-04 09:15:54,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2018-10-04 09:15:54,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2018-10-04 09:15:54,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 229 transitions. [2018-10-04 09:15:54,197 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 229 transitions. Word has length 224 [2018-10-04 09:15:54,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:15:54,197 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 229 transitions. [2018-10-04 09:15:54,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-10-04 09:15:54,197 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 229 transitions. [2018-10-04 09:15:54,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2018-10-04 09:15:54,198 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:15:54,198 INFO L375 BasicCegarLoop]: trace histogram [106, 105, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:15:54,198 INFO L423 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:15:54,198 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:15:54,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1866406352, now seen corresponding path program 104 times [2018-10-04 09:15:54,198 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:15:54,198 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:15:54,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:54,199 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:15:54,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:54,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:58,542 INFO L134 CoverageAnalysis]: Checked inductivity of 11148 backedges. 0 proven. 11130 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:15:58,543 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:15:58,543 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 [2018-10-04 09:15:58,550 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:15:58,694 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:15:58,694 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:15:58,699 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:15:58,739 INFO L134 CoverageAnalysis]: Checked inductivity of 11148 backedges. 0 proven. 11130 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:15:58,759 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:15:58,760 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-10-04 09:15:58,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-10-04 09:15:58,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-10-04 09:15:58,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-10-04 09:15:58,761 INFO L87 Difference]: Start difference. First operand 227 states and 229 transitions. Second operand 108 states. [2018-10-04 09:15:59,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:15:59,118 INFO L93 Difference]: Finished difference Result 243 states and 247 transitions. [2018-10-04 09:15:59,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-10-04 09:15:59,119 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 226 [2018-10-04 09:15:59,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:15:59,120 INFO L225 Difference]: With dead ends: 243 [2018-10-04 09:15:59,120 INFO L226 Difference]: Without dead ends: 229 [2018-10-04 09:15:59,120 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-10-04 09:15:59,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2018-10-04 09:15:59,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2018-10-04 09:15:59,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2018-10-04 09:15:59,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 231 transitions. [2018-10-04 09:15:59,126 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 231 transitions. Word has length 226 [2018-10-04 09:15:59,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:15:59,126 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 231 transitions. [2018-10-04 09:15:59,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-10-04 09:15:59,127 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 231 transitions. [2018-10-04 09:15:59,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2018-10-04 09:15:59,127 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:15:59,127 INFO L375 BasicCegarLoop]: trace histogram [107, 106, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:15:59,127 INFO L423 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:15:59,128 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:15:59,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1008307668, now seen corresponding path program 105 times [2018-10-04 09:15:59,128 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:15:59,128 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:15:59,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:59,128 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:15:59,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:59,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:03,492 INFO L134 CoverageAnalysis]: Checked inductivity of 11360 backedges. 0 proven. 11342 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:16:03,492 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:03,493 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 [2018-10-04 09:16:03,501 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:16:03,886 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 107 check-sat command(s) [2018-10-04 09:16:03,886 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:03,891 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:03,936 INFO L134 CoverageAnalysis]: Checked inductivity of 11360 backedges. 0 proven. 11342 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:16:03,956 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:03,957 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 108 [2018-10-04 09:16:03,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-10-04 09:16:03,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-10-04 09:16:03,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-10-04 09:16:03,958 INFO L87 Difference]: Start difference. First operand 229 states and 231 transitions. Second operand 109 states. [2018-10-04 09:16:04,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:04,482 INFO L93 Difference]: Finished difference Result 245 states and 249 transitions. [2018-10-04 09:16:04,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-10-04 09:16:04,483 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 228 [2018-10-04 09:16:04,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:04,484 INFO L225 Difference]: With dead ends: 245 [2018-10-04 09:16:04,484 INFO L226 Difference]: Without dead ends: 231 [2018-10-04 09:16:04,485 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-10-04 09:16:04,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2018-10-04 09:16:04,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2018-10-04 09:16:04,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2018-10-04 09:16:04,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 233 transitions. [2018-10-04 09:16:04,494 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 233 transitions. Word has length 228 [2018-10-04 09:16:04,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:04,494 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 233 transitions. [2018-10-04 09:16:04,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-10-04 09:16:04,495 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 233 transitions. [2018-10-04 09:16:04,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2018-10-04 09:16:04,495 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:04,496 INFO L375 BasicCegarLoop]: trace histogram [108, 107, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:16:04,496 INFO L423 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:04,496 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:04,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1009193176, now seen corresponding path program 106 times [2018-10-04 09:16:04,496 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:04,496 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:04,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:04,497 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:04,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:04,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:08,958 INFO L134 CoverageAnalysis]: Checked inductivity of 11574 backedges. 0 proven. 11556 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:16:08,958 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:08,958 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 [2018-10-04 09:16:08,966 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:16:09,119 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:16:09,119 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:09,125 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:09,171 INFO L134 CoverageAnalysis]: Checked inductivity of 11574 backedges. 0 proven. 11556 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:16:09,191 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:09,192 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109] total 109 [2018-10-04 09:16:09,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-10-04 09:16:09,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-10-04 09:16:09,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-10-04 09:16:09,193 INFO L87 Difference]: Start difference. First operand 231 states and 233 transitions. Second operand 110 states. [2018-10-04 09:16:09,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:09,528 INFO L93 Difference]: Finished difference Result 247 states and 251 transitions. [2018-10-04 09:16:09,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-10-04 09:16:09,529 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 230 [2018-10-04 09:16:09,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:09,529 INFO L225 Difference]: With dead ends: 247 [2018-10-04 09:16:09,529 INFO L226 Difference]: Without dead ends: 233 [2018-10-04 09:16:09,530 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-10-04 09:16:09,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2018-10-04 09:16:09,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2018-10-04 09:16:09,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2018-10-04 09:16:09,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 235 transitions. [2018-10-04 09:16:09,536 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 235 transitions. Word has length 230 [2018-10-04 09:16:09,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:09,536 INFO L480 AbstractCegarLoop]: Abstraction has 233 states and 235 transitions. [2018-10-04 09:16:09,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-10-04 09:16:09,537 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 235 transitions. [2018-10-04 09:16:09,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2018-10-04 09:16:09,537 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:09,537 INFO L375 BasicCegarLoop]: trace histogram [109, 108, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:16:09,537 INFO L423 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:09,538 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:09,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1860166364, now seen corresponding path program 107 times [2018-10-04 09:16:09,538 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:09,538 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:09,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:09,538 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:09,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:09,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:14,099 INFO L134 CoverageAnalysis]: Checked inductivity of 11790 backedges. 0 proven. 11772 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:16:14,099 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:14,099 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 [2018-10-04 09:16:14,106 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:16:14,484 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 109 check-sat command(s) [2018-10-04 09:16:14,484 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:14,490 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:14,537 INFO L134 CoverageAnalysis]: Checked inductivity of 11790 backedges. 0 proven. 11772 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:16:14,558 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:14,558 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 110] total 110 [2018-10-04 09:16:14,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 111 states [2018-10-04 09:16:14,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2018-10-04 09:16:14,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-10-04 09:16:14,561 INFO L87 Difference]: Start difference. First operand 233 states and 235 transitions. Second operand 111 states. [2018-10-04 09:16:14,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:14,854 INFO L93 Difference]: Finished difference Result 249 states and 253 transitions. [2018-10-04 09:16:14,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-10-04 09:16:14,854 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 232 [2018-10-04 09:16:14,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:14,855 INFO L225 Difference]: With dead ends: 249 [2018-10-04 09:16:14,855 INFO L226 Difference]: Without dead ends: 235 [2018-10-04 09:16:14,857 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-10-04 09:16:14,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2018-10-04 09:16:14,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2018-10-04 09:16:14,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2018-10-04 09:16:14,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 237 transitions. [2018-10-04 09:16:14,864 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 237 transitions. Word has length 232 [2018-10-04 09:16:14,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:14,864 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 237 transitions. [2018-10-04 09:16:14,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has 111 states. [2018-10-04 09:16:14,864 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 237 transitions. [2018-10-04 09:16:14,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2018-10-04 09:16:14,865 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:14,865 INFO L375 BasicCegarLoop]: trace histogram [110, 109, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:16:14,865 INFO L423 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:14,865 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:14,865 INFO L82 PathProgramCache]: Analyzing trace with hash 693353504, now seen corresponding path program 108 times [2018-10-04 09:16:14,865 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:14,866 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:14,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:14,866 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:14,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:14,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-10-04 09:16:15,847 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-04 09:16:15,851 WARN L205 ceAbstractionStarter]: Timeout [2018-10-04 09:16:15,852 INFO L202 PluginConnector]: Adding new model fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.10 09:16:15 BoogieIcfgContainer [2018-10-04 09:16:15,852 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-04 09:16:15,852 INFO L168 Benchmark]: Toolchain (without parser) took 236307.76 ms. Allocated memory was 1.5 GB in the beginning and 1.9 GB in the end (delta: 431.0 MB). Free memory was 1.4 GB in the beginning and 1.5 GB in the end (delta: -78.7 MB). Peak memory consumption was 352.3 MB. Max. memory is 7.1 GB. [2018-10-04 09:16:15,853 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 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. [2018-10-04 09:16:15,854 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.95 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. [2018-10-04 09:16:15,854 INFO L168 Benchmark]: Boogie Preprocessor took 21.26 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. [2018-10-04 09:16:15,854 INFO L168 Benchmark]: RCFGBuilder took 255.69 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. [2018-10-04 09:16:15,855 INFO L168 Benchmark]: TraceAbstraction took 235988.63 ms. Allocated memory was 1.5 GB in the beginning and 1.9 GB in the end (delta: 431.0 MB). Free memory was 1.4 GB in the beginning and 1.5 GB in the end (delta: -99.8 MB). Peak memory consumption was 331.1 MB. Max. memory is 7.1 GB. [2018-10-04 09:16:15,856 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 0.21 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 37.95 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 21.26 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 255.69 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 235988.63 ms. Allocated memory was 1.5 GB in the beginning and 1.9 GB in the end (delta: 431.0 MB). Free memory was 1.4 GB in the beginning and 1.5 GB in the end (delta: -99.8 MB). Peak memory consumption was 331.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 83]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 83). Cancelled while BasicCegarLoop was analyzing trace of length 235 with TraceHistMax 110, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 49 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 10 locations, 1 error locations. TIMEOUT Result, 235.9s OverallTime, 112 OverallIterations, 110 TraceHistogramMax, 25.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 999 SDtfs, 31 SDslu, 22325 SDs, 0 SdLazy, 12647 SolverSat, 195 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 16.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 19496 GetRequests, 13495 SyntacticMatches, 0 SemanticMatches, 6001 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 179.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=235occurred in iteration=111, 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: 0.6s AutomataMinimizationTime, 111 MinimizatonAttempts, 11 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.6s SsaConstructionTime, 15.3s SatisfiabilityAnalysisTime, 186.1s InterpolantComputationTime, 27011 NumberOfCodeBlocks, 27011 NumberOfCodeBlocksAsserted, 3206 NumberOfCheckSat, 26792 ConstructedInterpolants, 0 QuantifiedInterpolants, 11786318 SizeOfPredicates, 108 NumberOfNonLiveVariables, 65841 ConjunctsInSsa, 6102 ConjunctsInUnsatCore, 219 InterpolantComputations, 3 PerfectInterpolantSequences, 3864/867144 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/fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-04_09-16-15-865.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-04_09-16-15-865.csv Completed graceful shutdown