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/20170304-DifficultPathPrograms/const1.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-133090d [2018-10-04 09:15:00,338 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-04 09:15:00,341 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-04 09:15:00,356 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-04 09:15:00,356 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-04 09:15:00,357 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-04 09:15:00,358 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-04 09:15:00,360 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-04 09:15:00,362 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-04 09:15:00,363 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-04 09:15:00,365 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-04 09:15:00,365 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-04 09:15:00,366 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-04 09:15:00,367 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-04 09:15:00,368 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-04 09:15:00,369 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-04 09:15:00,370 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-04 09:15:00,372 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-04 09:15:00,374 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-04 09:15:00,375 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-04 09:15:00,376 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-04 09:15:00,378 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-04 09:15:00,380 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-04 09:15:00,381 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-04 09:15:00,381 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-04 09:15:00,382 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-04 09:15:00,383 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-04 09:15:00,384 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-04 09:15:00,384 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-04 09:15:00,388 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-04 09:15:00,388 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-04 09:15:00,389 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-04 09:15:00,389 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-04 09:15:00,390 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-04 09:15:00,391 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-04 09:15:00,391 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-04 09:15:00,392 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 09:15:00,411 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-04 09:15:00,411 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-04 09:15:00,412 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-04 09:15:00,412 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-04 09:15:00,415 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-04 09:15:00,415 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-04 09:15:00,417 INFO L133 SettingsManager]: * Use SBE=true [2018-10-04 09:15:00,417 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-04 09:15:00,417 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-04 09:15:00,417 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-04 09:15:00,417 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-04 09:15:00,418 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-04 09:15:00,418 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-04 09:15:00,418 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-04 09:15:00,418 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-04 09:15:00,418 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-04 09:15:00,419 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-04 09:15:00,419 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-04 09:15:00,419 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-04 09:15:00,419 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-04 09:15:00,419 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-04 09:15:00,420 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-04 09:15:00,420 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 09:15:00,421 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-04 09:15:00,421 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-04 09:15:00,421 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-04 09:15:00,421 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-04 09:15:00,421 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-04 09:15:00,421 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-04 09:15:00,422 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-04 09:15:00,466 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-04 09:15:00,483 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-04 09:15:00,490 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-04 09:15:00,491 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-04 09:15:00,492 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-04 09:15:00,494 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/const1.i_3.bpl [2018-10-04 09:15:00,494 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/const1.i_3.bpl' [2018-10-04 09:15:00,543 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-04 09:15:00,545 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-04 09:15:00,546 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-04 09:15:00,546 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-04 09:15:00,546 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-04 09:15:00,566 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "const1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:15:00" (1/1) ... [2018-10-04 09:15:00,579 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "const1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:15:00" (1/1) ... [2018-10-04 09:15:00,586 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-04 09:15:00,587 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-04 09:15:00,587 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-04 09:15:00,587 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-04 09:15:00,598 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "const1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:15:00" (1/1) ... [2018-10-04 09:15:00,599 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "const1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:15:00" (1/1) ... [2018-10-04 09:15:00,599 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "const1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:15:00" (1/1) ... [2018-10-04 09:15:00,600 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "const1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:15:00" (1/1) ... [2018-10-04 09:15:00,604 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "const1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:15:00" (1/1) ... [2018-10-04 09:15:00,606 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "const1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:15:00" (1/1) ... [2018-10-04 09:15:00,608 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "const1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:15:00" (1/1) ... [2018-10-04 09:15:00,611 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-04 09:15:00,612 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-04 09:15:00,612 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-04 09:15:00,613 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-04 09:15:00,614 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "const1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:15:00" (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 09:15:00,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-04 09:15:00,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-04 09:15:00,924 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-04 09:15:00,924 INFO L202 PluginConnector]: Adding new model const1.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 09:15:00 BoogieIcfgContainer [2018-10-04 09:15:00,925 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-04 09:15:00,926 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-04 09:15:00,926 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-04 09:15:00,929 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-04 09:15:00,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "const1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:15:00" (1/2) ... [2018-10-04 09:15:00,931 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ada69b4 and model type const1.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 09:15:00, skipping insertion in model container [2018-10-04 09:15:00,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "const1.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 09:15:00" (2/2) ... [2018-10-04 09:15:00,933 INFO L112 eAbstractionObserver]: Analyzing ICFG const1.i_3.bpl [2018-10-04 09:15:00,942 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-04 09:15:00,950 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-04 09:15:01,004 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-04 09:15:01,005 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-04 09:15:01,005 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-04 09:15:01,005 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-04 09:15:01,006 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-04 09:15:01,006 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-04 09:15:01,006 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-04 09:15:01,006 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-04 09:15:01,006 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-04 09:15:01,022 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-10-04 09:15:01,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-04 09:15:01,029 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:15:01,030 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-10-04 09:15:01,031 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:15:01,037 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:15:01,038 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-10-04 09:15:01,040 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:15:01,040 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:15:01,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:01,097 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:15:01,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:01,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:01,225 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 09:15:01,228 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 09:15:01,228 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-04 09:15:01,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-04 09:15:01,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-04 09:15:01,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-04 09:15:01,249 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-10-04 09:15:01,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:15:01,284 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-10-04 09:15:01,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-04 09:15:01,286 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-10-04 09:15:01,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:15:01,297 INFO L225 Difference]: With dead ends: 11 [2018-10-04 09:15:01,298 INFO L226 Difference]: Without dead ends: 7 [2018-10-04 09:15:01,301 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 09:15:01,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-04 09:15:01,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-04 09:15:01,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-04 09:15:01,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-10-04 09:15:01,340 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-10-04 09:15:01,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:15:01,341 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-10-04 09:15:01,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-04 09:15:01,341 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-10-04 09:15:01,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-04 09:15:01,341 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:15:01,342 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-10-04 09:15:01,342 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:15:01,342 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:15:01,342 INFO L82 PathProgramCache]: Analyzing trace with hash 889591169, now seen corresponding path program 1 times [2018-10-04 09:15:01,343 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:15:01,343 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:15:01,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:01,344 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:15:01,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:01,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:01,553 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 09:15:01,554 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:15:01,554 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 09:15:01,568 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:15:01,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:01,600 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:15:01,685 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 09:15:01,721 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:15:01,721 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-04 09:15:01,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-04 09:15:01,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-04 09:15:01,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-04 09:15:01,725 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 4 states. [2018-10-04 09:15:01,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:15:01,848 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-04 09:15:01,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-04 09:15:01,849 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-10-04 09:15:01,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:15:01,850 INFO L225 Difference]: With dead ends: 11 [2018-10-04 09:15:01,850 INFO L226 Difference]: Without dead ends: 9 [2018-10-04 09:15:01,851 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-04 09:15:01,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-04 09:15:01,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-04 09:15:01,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-04 09:15:01,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-04 09:15:01,856 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-10-04 09:15:01,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:15:01,856 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-04 09:15:01,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-04 09:15:01,859 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-04 09:15:01,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-04 09:15:01,859 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:15:01,859 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2018-10-04 09:15:01,860 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:15:01,860 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:15:01,861 INFO L82 PathProgramCache]: Analyzing trace with hash 198673595, now seen corresponding path program 2 times [2018-10-04 09:15:01,861 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:15:01,861 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:15:01,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:01,863 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:15:01,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:01,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:02,017 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:02,017 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:15:02,017 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:15:02,034 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:15:02,056 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:15:02,056 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:15:02,058 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:15:02,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:02,125 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:15:02,126 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-04 09:15:02,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-04 09:15:02,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-04 09:15:02,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-04 09:15:02,127 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-10-04 09:15:02,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:15:02,216 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-10-04 09:15:02,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 09:15:02,217 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-10-04 09:15:02,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:15:02,218 INFO L225 Difference]: With dead ends: 13 [2018-10-04 09:15:02,218 INFO L226 Difference]: Without dead ends: 11 [2018-10-04 09:15:02,219 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-04 09:15:02,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-04 09:15:02,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-04 09:15:02,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-04 09:15:02,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-04 09:15:02,223 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-10-04 09:15:02,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:15:02,223 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-04 09:15:02,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-04 09:15:02,224 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-04 09:15:02,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-04 09:15:02,224 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:15:02,225 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2018-10-04 09:15:02,225 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:15:02,225 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:15:02,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1946815861, now seen corresponding path program 3 times [2018-10-04 09:15:02,226 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:15:02,226 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:15:02,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:02,227 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:15:02,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:02,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:02,595 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:02,596 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:15:02,596 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 09:15:02,611 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:15:02,667 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-04 09:15:02,668 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:15:02,670 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:15:02,689 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:02,709 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:15:02,709 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-04 09:15:02,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-04 09:15:02,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-04 09:15:02,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-10-04 09:15:02,711 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2018-10-04 09:15:02,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:15:02,760 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-10-04 09:15:02,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 09:15:02,762 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-10-04 09:15:02,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:15:02,762 INFO L225 Difference]: With dead ends: 15 [2018-10-04 09:15:02,763 INFO L226 Difference]: Without dead ends: 13 [2018-10-04 09:15:02,763 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-10-04 09:15:02,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-04 09:15:02,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-04 09:15:02,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-04 09:15:02,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-04 09:15:02,768 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-10-04 09:15:02,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:15:02,768 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-04 09:15:02,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-04 09:15:02,768 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-04 09:15:02,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-04 09:15:02,769 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:15:02,769 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1] [2018-10-04 09:15:02,770 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:15:02,770 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:15:02,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1715646545, now seen corresponding path program 4 times [2018-10-04 09:15:02,770 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:15:02,770 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:15:02,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:02,772 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:15:02,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:02,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:02,897 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:02,897 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:15:02,897 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 09:15:02,906 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:15:02,935 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:15:02,936 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:15:02,937 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:15:02,959 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:02,980 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:15:02,980 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-04 09:15:02,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-04 09:15:02,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-04 09:15:02,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-10-04 09:15:02,981 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2018-10-04 09:15:03,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:15:03,132 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-04 09:15:03,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 09:15:03,133 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-10-04 09:15:03,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:15:03,134 INFO L225 Difference]: With dead ends: 17 [2018-10-04 09:15:03,134 INFO L226 Difference]: Without dead ends: 15 [2018-10-04 09:15:03,135 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-10-04 09:15:03,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-04 09:15:03,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-04 09:15:03,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-04 09:15:03,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-04 09:15:03,140 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-10-04 09:15:03,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:15:03,140 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-04 09:15:03,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-04 09:15:03,141 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-04 09:15:03,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-04 09:15:03,141 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:15:03,141 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1] [2018-10-04 09:15:03,142 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:15:03,142 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:15:03,142 INFO L82 PathProgramCache]: Analyzing trace with hash 531164009, now seen corresponding path program 5 times [2018-10-04 09:15:03,142 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:15:03,143 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:15:03,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:03,144 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:15:03,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:03,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:03,333 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:03,333 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:15:03,334 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:15:03,345 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:15:03,431 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-04 09:15:03,432 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:15:03,434 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:15:03,470 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:03,496 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:15:03,496 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 09:15:03,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 09:15:03,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 09:15:03,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:15:03,498 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2018-10-04 09:15:03,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:15:03,573 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-04 09:15:03,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 09:15:03,575 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-10-04 09:15:03,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:15:03,576 INFO L225 Difference]: With dead ends: 19 [2018-10-04 09:15:03,576 INFO L226 Difference]: Without dead ends: 17 [2018-10-04 09:15:03,577 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:15:03,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-04 09:15:03,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-04 09:15:03,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-04 09:15:03,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-04 09:15:03,581 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-10-04 09:15:03,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:15:03,582 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-04 09:15:03,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 09:15:03,582 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-04 09:15:03,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-04 09:15:03,583 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:15:03,583 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1] [2018-10-04 09:15:03,583 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:15:03,583 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:15:03,583 INFO L82 PathProgramCache]: Analyzing trace with hash -652443485, now seen corresponding path program 6 times [2018-10-04 09:15:03,584 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:15:03,584 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:15:03,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:03,585 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:15:03,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:03,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:03,935 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:03,935 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:15:03,935 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 09:15:03,961 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:15:04,062 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-04 09:15:04,062 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:15:04,065 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:15:04,144 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:04,176 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:15:04,176 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:15:04,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:15:04,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:15:04,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:15:04,177 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2018-10-04 09:15:04,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:15:04,309 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-04 09:15:04,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:15:04,313 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-10-04 09:15:04,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:15:04,314 INFO L225 Difference]: With dead ends: 21 [2018-10-04 09:15:04,314 INFO L226 Difference]: Without dead ends: 19 [2018-10-04 09:15:04,315 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:15:04,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-04 09:15:04,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-04 09:15:04,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-04 09:15:04,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-04 09:15:04,320 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-10-04 09:15:04,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:15:04,321 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-04 09:15:04,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:15:04,321 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-04 09:15:04,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-04 09:15:04,322 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:15:04,322 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1] [2018-10-04 09:15:04,322 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:15:04,322 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:15:04,323 INFO L82 PathProgramCache]: Analyzing trace with hash 67088221, now seen corresponding path program 7 times [2018-10-04 09:15:04,323 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:15:04,323 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:15:04,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:04,324 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:15:04,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:04,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:04,558 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:04,558 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:15:04,559 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 09:15:04,573 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:15:04,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:04,597 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:15:04,617 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:04,638 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:15:04,638 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:15:04,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:15:04,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:15:04,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:15:04,639 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2018-10-04 09:15:04,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:15:04,725 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-04 09:15:04,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:15:04,726 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-10-04 09:15:04,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:15:04,726 INFO L225 Difference]: With dead ends: 23 [2018-10-04 09:15:04,727 INFO L226 Difference]: Without dead ends: 21 [2018-10-04 09:15:04,727 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:15:04,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-04 09:15:04,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-04 09:15:04,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-04 09:15:04,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-04 09:15:04,732 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2018-10-04 09:15:04,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:15:04,732 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-04 09:15:04,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:15:04,733 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-04 09:15:04,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-04 09:15:04,733 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:15:04,734 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1] [2018-10-04 09:15:04,734 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:15:04,734 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:15:04,734 INFO L82 PathProgramCache]: Analyzing trace with hash 47323031, now seen corresponding path program 8 times [2018-10-04 09:15:04,735 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:15:04,735 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:15:04,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:04,736 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:15:04,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:04,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:05,002 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:05,003 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:15:05,003 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:15:05,012 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:15:05,025 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:15:05,025 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:15:05,029 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:15:05,047 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:05,069 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:15:05,069 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:15:05,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:15:05,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:15:05,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:15:05,071 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 11 states. [2018-10-04 09:15:05,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:15:05,285 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-04 09:15:05,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:15:05,286 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-10-04 09:15:05,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:15:05,287 INFO L225 Difference]: With dead ends: 25 [2018-10-04 09:15:05,288 INFO L226 Difference]: Without dead ends: 23 [2018-10-04 09:15:05,288 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:15:05,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-04 09:15:05,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-04 09:15:05,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-04 09:15:05,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-04 09:15:05,293 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2018-10-04 09:15:05,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:15:05,294 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-04 09:15:05,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:15:05,294 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-04 09:15:05,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-04 09:15:05,295 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:15:05,295 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1] [2018-10-04 09:15:05,295 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:15:05,296 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:15:05,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1767155375, now seen corresponding path program 9 times [2018-10-04 09:15:05,296 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:15:05,296 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:15:05,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:05,297 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:15:05,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:05,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:05,492 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:05,493 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:15:05,493 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:15:05,503 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:15:05,641 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-04 09:15:05,641 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:15:05,643 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:15:05,672 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:05,692 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:15:05,693 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-04 09:15:05,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-04 09:15:05,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-04 09:15:05,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-10-04 09:15:05,694 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 12 states. [2018-10-04 09:15:05,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:15:05,830 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-04 09:15:05,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-04 09:15:05,831 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-10-04 09:15:05,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:15:05,832 INFO L225 Difference]: With dead ends: 27 [2018-10-04 09:15:05,832 INFO L226 Difference]: Without dead ends: 25 [2018-10-04 09:15:05,833 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-10-04 09:15:05,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-04 09:15:05,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-04 09:15:05,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-04 09:15:05,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-10-04 09:15:05,838 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2018-10-04 09:15:05,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:15:05,838 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-10-04 09:15:05,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-04 09:15:05,838 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-10-04 09:15:05,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-04 09:15:05,839 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:15:05,839 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1] [2018-10-04 09:15:05,839 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:15:05,840 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:15:05,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1724181365, now seen corresponding path program 10 times [2018-10-04 09:15:05,840 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:15:05,840 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:15:05,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:05,841 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:15:05,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:05,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:06,041 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:06,042 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:15:06,042 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 09:15:06,050 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:15:06,063 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:15:06,063 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:15:06,065 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:15:06,090 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:06,111 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:15:06,111 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-04 09:15:06,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-04 09:15:06,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-04 09:15:06,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-10-04 09:15:06,112 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 13 states. [2018-10-04 09:15:06,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:15:06,501 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-04 09:15:06,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-04 09:15:06,502 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-10-04 09:15:06,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:15:06,503 INFO L225 Difference]: With dead ends: 29 [2018-10-04 09:15:06,503 INFO L226 Difference]: Without dead ends: 27 [2018-10-04 09:15:06,504 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-10-04 09:15:06,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-04 09:15:06,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-04 09:15:06,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-04 09:15:06,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-04 09:15:06,510 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2018-10-04 09:15:06,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:15:06,511 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-04 09:15:06,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-04 09:15:06,511 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-04 09:15:06,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-04 09:15:06,512 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:15:06,512 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1] [2018-10-04 09:15:06,512 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:15:06,512 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:15:06,513 INFO L82 PathProgramCache]: Analyzing trace with hash 919136581, now seen corresponding path program 11 times [2018-10-04 09:15:06,513 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:15:06,513 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:15:06,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:06,514 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:15:06,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:06,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:06,779 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:06,779 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:15:06,779 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:15:06,788 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:15:10,494 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-04 09:15:10,495 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:15:10,524 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:15:10,541 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:10,571 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:15:10,571 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-04 09:15:10,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 09:15:10,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 09:15:10,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-10-04 09:15:10,572 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 14 states. [2018-10-04 09:15:10,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:15:10,724 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-04 09:15:10,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-04 09:15:10,727 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-10-04 09:15:10,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:15:10,728 INFO L225 Difference]: With dead ends: 31 [2018-10-04 09:15:10,728 INFO L226 Difference]: Without dead ends: 29 [2018-10-04 09:15:10,728 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-10-04 09:15:10,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-04 09:15:10,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-04 09:15:10,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-04 09:15:10,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-04 09:15:10,735 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2018-10-04 09:15:10,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:15:10,735 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-04 09:15:10,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 09:15:10,735 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-04 09:15:10,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-04 09:15:10,736 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:15:10,737 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1] [2018-10-04 09:15:10,737 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:15:10,737 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:15:10,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1472956545, now seen corresponding path program 12 times [2018-10-04 09:15:10,737 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:15:10,738 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:15:10,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:10,739 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:15:10,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:10,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:11,190 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:11,191 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:15:11,191 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:15:11,198 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:15:11,309 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-04 09:15:11,309 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:15:11,311 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:15:11,343 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:11,363 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:15:11,363 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-04 09:15:11,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-04 09:15:11,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-04 09:15:11,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-10-04 09:15:11,364 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 15 states. [2018-10-04 09:15:11,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:15:11,540 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-04 09:15:11,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-04 09:15:11,540 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-10-04 09:15:11,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:15:11,541 INFO L225 Difference]: With dead ends: 33 [2018-10-04 09:15:11,542 INFO L226 Difference]: Without dead ends: 31 [2018-10-04 09:15:11,543 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-10-04 09:15:11,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-04 09:15:11,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-04 09:15:11,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-04 09:15:11,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-10-04 09:15:11,549 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2018-10-04 09:15:11,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:15:11,549 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-10-04 09:15:11,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-04 09:15:11,549 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-10-04 09:15:11,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-04 09:15:11,550 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:15:11,550 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1] [2018-10-04 09:15:11,551 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:15:11,551 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:15:11,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1828020025, now seen corresponding path program 13 times [2018-10-04 09:15:11,551 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:15:11,551 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:15:11,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:11,552 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:15:11,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:11,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:11,863 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:11,863 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:15:11,863 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 09:15:11,873 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:15:11,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:11,901 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:15:11,973 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:12,008 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:15:12,008 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-04 09:15:12,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-04 09:15:12,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-04 09:15:12,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-10-04 09:15:12,010 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 16 states. [2018-10-04 09:15:12,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:15:12,271 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-10-04 09:15:12,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-04 09:15:12,272 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-10-04 09:15:12,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:15:12,273 INFO L225 Difference]: With dead ends: 35 [2018-10-04 09:15:12,274 INFO L226 Difference]: Without dead ends: 33 [2018-10-04 09:15:12,275 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-10-04 09:15:12,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-04 09:15:12,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-04 09:15:12,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-04 09:15:12,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-04 09:15:12,281 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2018-10-04 09:15:12,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:15:12,281 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-04 09:15:12,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-04 09:15:12,282 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-04 09:15:12,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-04 09:15:12,282 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:15:12,283 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1] [2018-10-04 09:15:12,283 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:15:12,283 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:15:12,283 INFO L82 PathProgramCache]: Analyzing trace with hash 85672051, now seen corresponding path program 14 times [2018-10-04 09:15:12,283 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:15:12,284 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:15:12,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:12,284 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:15:12,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:12,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:13,030 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:13,030 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:15:13,030 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:15:13,040 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:15:13,056 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:15:13,056 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:15:13,058 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:15:13,075 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:13,096 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:15:13,096 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-04 09:15:13,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-04 09:15:13,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-04 09:15:13,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-10-04 09:15:13,097 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 17 states. [2018-10-04 09:15:13,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:15:13,489 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-04 09:15:13,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-04 09:15:13,490 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-10-04 09:15:13,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:15:13,491 INFO L225 Difference]: With dead ends: 37 [2018-10-04 09:15:13,491 INFO L226 Difference]: Without dead ends: 35 [2018-10-04 09:15:13,492 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-10-04 09:15:13,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-04 09:15:13,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-04 09:15:13,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-04 09:15:13,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-04 09:15:13,499 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2018-10-04 09:15:13,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:15:13,500 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-04 09:15:13,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-04 09:15:13,500 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-04 09:15:13,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-04 09:15:13,501 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:15:13,501 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1] [2018-10-04 09:15:13,501 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:15:13,501 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:15:13,501 INFO L82 PathProgramCache]: Analyzing trace with hash 726514477, now seen corresponding path program 15 times [2018-10-04 09:15:13,502 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:15:13,502 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:15:13,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:13,503 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:15:13,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:13,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:13,867 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:13,868 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:15:13,868 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 09:15:13,875 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:15:14,197 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-04 09:15:14,197 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:15:14,203 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:15:14,221 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:14,242 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:15:14,242 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-04 09:15:14,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-04 09:15:14,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-04 09:15:14,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-10-04 09:15:14,243 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 18 states. [2018-10-04 09:15:14,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:15:14,502 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-04 09:15:14,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-04 09:15:14,504 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-10-04 09:15:14,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:15:14,505 INFO L225 Difference]: With dead ends: 39 [2018-10-04 09:15:14,505 INFO L226 Difference]: Without dead ends: 37 [2018-10-04 09:15:14,505 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-10-04 09:15:14,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-04 09:15:14,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-04 09:15:14,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-04 09:15:14,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-10-04 09:15:14,511 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2018-10-04 09:15:14,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:15:14,511 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-10-04 09:15:14,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-04 09:15:14,512 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-10-04 09:15:14,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-04 09:15:14,512 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:15:14,512 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1] [2018-10-04 09:15:14,513 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:15:14,513 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:15:14,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1899204761, now seen corresponding path program 16 times [2018-10-04 09:15:14,513 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:15:14,513 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:15:14,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:14,514 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:15:14,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:14,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:15,064 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:15,064 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:15:15,064 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 09:15:15,071 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:15:15,090 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:15:15,090 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:15:15,092 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:15:15,120 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:15,152 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:15:15,152 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-04 09:15:15,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-04 09:15:15,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-04 09:15:15,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-10-04 09:15:15,154 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 19 states. [2018-10-04 09:15:15,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:15:15,564 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-10-04 09:15:15,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-04 09:15:15,571 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-10-04 09:15:15,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:15:15,571 INFO L225 Difference]: With dead ends: 41 [2018-10-04 09:15:15,572 INFO L226 Difference]: Without dead ends: 39 [2018-10-04 09:15:15,572 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-10-04 09:15:15,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-04 09:15:15,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-04 09:15:15,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-04 09:15:15,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-10-04 09:15:15,577 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2018-10-04 09:15:15,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:15:15,577 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-10-04 09:15:15,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-04 09:15:15,578 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-10-04 09:15:15,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-04 09:15:15,578 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:15:15,579 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1] [2018-10-04 09:15:15,579 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:15:15,579 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:15:15,579 INFO L82 PathProgramCache]: Analyzing trace with hash 225377569, now seen corresponding path program 17 times [2018-10-04 09:15:15,579 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:15:15,579 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:15:15,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:15,580 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:15:15,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:15,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:16,275 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:16,275 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:15:16,276 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 09:15:16,283 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:15:46,699 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-04 09:15:46,699 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:15:46,747 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:15:46,780 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:46,801 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:15:46,802 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-04 09:15:46,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 09:15:46,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 09:15:46,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-10-04 09:15:46,803 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 20 states. [2018-10-04 09:15:47,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:15:47,084 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-04 09:15:47,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-04 09:15:47,087 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-10-04 09:15:47,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:15:47,087 INFO L225 Difference]: With dead ends: 43 [2018-10-04 09:15:47,087 INFO L226 Difference]: Without dead ends: 41 [2018-10-04 09:15:47,088 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-10-04 09:15:47,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-04 09:15:47,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-04 09:15:47,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-04 09:15:47,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-10-04 09:15:47,094 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2018-10-04 09:15:47,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:15:47,094 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-10-04 09:15:47,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 09:15:47,095 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-10-04 09:15:47,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-04 09:15:47,096 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:15:47,096 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1] [2018-10-04 09:15:47,096 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:15:47,096 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:15:47,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1839531099, now seen corresponding path program 18 times [2018-10-04 09:15:47,097 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:15:47,097 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:15:47,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:47,098 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:15:47,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:47,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:47,419 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:47,419 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:15:47,419 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 09:15:47,427 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:15:57,384 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-04 09:15:57,384 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:15:57,408 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:15:57,442 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:57,463 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:15:57,463 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-04 09:15:57,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-04 09:15:57,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-04 09:15:57,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-10-04 09:15:57,464 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 21 states. [2018-10-04 09:15:58,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:15:58,222 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-10-04 09:15:58,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-04 09:15:58,223 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2018-10-04 09:15:58,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:15:58,224 INFO L225 Difference]: With dead ends: 45 [2018-10-04 09:15:58,224 INFO L226 Difference]: Without dead ends: 43 [2018-10-04 09:15:58,225 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-10-04 09:15:58,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-04 09:15:58,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-04 09:15:58,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-04 09:15:58,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-10-04 09:15:58,230 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2018-10-04 09:15:58,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:15:58,230 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-10-04 09:15:58,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-04 09:15:58,230 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-10-04 09:15:58,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-04 09:15:58,231 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:15:58,231 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1] [2018-10-04 09:15:58,231 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:15:58,231 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:15:58,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1737087723, now seen corresponding path program 19 times [2018-10-04 09:15:58,232 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:15:58,232 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:15:58,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:58,233 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:15:58,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:58,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:58,581 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:58,582 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:15:58,582 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 09:15:58,589 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:15:58,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:58,612 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:15:58,649 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:58,672 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:15:58,672 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-04 09:15:58,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-04 09:15:58,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-04 09:15:58,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-10-04 09:15:58,673 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 22 states. [2018-10-04 09:15:59,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:15:59,167 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-10-04 09:15:59,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-04 09:15:59,168 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-10-04 09:15:59,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:15:59,169 INFO L225 Difference]: With dead ends: 47 [2018-10-04 09:15:59,169 INFO L226 Difference]: Without dead ends: 45 [2018-10-04 09:15:59,170 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-10-04 09:15:59,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-04 09:15:59,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-04 09:15:59,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-04 09:15:59,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-10-04 09:15:59,177 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2018-10-04 09:15:59,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:15:59,177 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-10-04 09:15:59,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-04 09:15:59,177 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-10-04 09:15:59,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-04 09:15:59,178 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:15:59,178 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1] [2018-10-04 09:15:59,178 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:15:59,178 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:15:59,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1401028431, now seen corresponding path program 20 times [2018-10-04 09:15:59,179 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:15:59,179 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:15:59,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:59,183 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:15:59,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:59,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:59,646 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:59,646 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:15:59,646 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 09:15:59,660 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:15:59,678 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:15:59,678 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:15:59,680 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:15:59,700 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:59,721 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:15:59,721 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-04 09:15:59,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-04 09:15:59,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-04 09:15:59,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-10-04 09:15:59,722 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 23 states. [2018-10-04 09:16:00,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:00,060 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-04 09:16:00,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-04 09:16:00,061 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2018-10-04 09:16:00,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:00,062 INFO L225 Difference]: With dead ends: 49 [2018-10-04 09:16:00,062 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 09:16:00,063 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-10-04 09:16:00,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 09:16:00,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-04 09:16:00,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-04 09:16:00,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-10-04 09:16:00,069 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2018-10-04 09:16:00,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:00,069 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-10-04 09:16:00,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-04 09:16:00,069 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-10-04 09:16:00,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-04 09:16:00,070 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:00,070 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1] [2018-10-04 09:16:00,070 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:00,070 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:00,071 INFO L82 PathProgramCache]: Analyzing trace with hash 2063610633, now seen corresponding path program 21 times [2018-10-04 09:16:00,071 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:00,071 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:00,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:00,072 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:00,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:00,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:00,545 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:00,545 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:00,545 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 09:16:00,555 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:16:08,580 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-10-04 09:16:08,580 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:08,596 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:08,632 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:08,653 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:08,653 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-04 09:16:08,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-04 09:16:08,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-04 09:16:08,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-10-04 09:16:08,654 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 24 states. [2018-10-04 09:16:08,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:08,995 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-10-04 09:16:08,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-04 09:16:08,999 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-10-04 09:16:08,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:09,000 INFO L225 Difference]: With dead ends: 51 [2018-10-04 09:16:09,000 INFO L226 Difference]: Without dead ends: 49 [2018-10-04 09:16:09,000 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-10-04 09:16:09,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-04 09:16:09,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-04 09:16:09,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-04 09:16:09,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-10-04 09:16:09,005 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2018-10-04 09:16:09,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:09,006 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-10-04 09:16:09,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-04 09:16:09,006 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-10-04 09:16:09,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-04 09:16:09,006 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:09,006 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1] [2018-10-04 09:16:09,007 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:09,007 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:09,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1145020349, now seen corresponding path program 22 times [2018-10-04 09:16:09,007 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:09,007 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:09,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:09,008 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:09,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:09,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:10,133 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:10,133 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:10,133 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 09:16:10,141 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:16:10,172 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:16:10,172 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:10,175 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:10,203 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:10,234 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:10,234 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-04 09:16:10,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-04 09:16:10,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-04 09:16:10,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-10-04 09:16:10,235 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 25 states. [2018-10-04 09:16:10,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:10,616 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-10-04 09:16:10,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-04 09:16:10,617 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2018-10-04 09:16:10,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:10,617 INFO L225 Difference]: With dead ends: 53 [2018-10-04 09:16:10,618 INFO L226 Difference]: Without dead ends: 51 [2018-10-04 09:16:10,618 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-10-04 09:16:10,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-04 09:16:10,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-04 09:16:10,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-04 09:16:10,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-10-04 09:16:10,625 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2018-10-04 09:16:10,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:10,625 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-10-04 09:16:10,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-04 09:16:10,625 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-10-04 09:16:10,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-04 09:16:10,626 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:10,626 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1] [2018-10-04 09:16:10,626 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:10,626 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:10,626 INFO L82 PathProgramCache]: Analyzing trace with hash -852875523, now seen corresponding path program 23 times [2018-10-04 09:16:10,627 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:10,627 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:10,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:10,627 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:10,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:10,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:11,077 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:11,077 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:11,077 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 09:16:11,085 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:17:31,485 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-10-04 09:17:31,486 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:17:31,788 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:17:31,817 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:31,849 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:17:31,849 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-04 09:17:31,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-04 09:17:31,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-04 09:17:31,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-10-04 09:17:31,850 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 26 states. [2018-10-04 09:17:32,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:17:32,311 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-10-04 09:17:32,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-04 09:17:32,311 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-10-04 09:17:32,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:17:32,312 INFO L225 Difference]: With dead ends: 55 [2018-10-04 09:17:32,313 INFO L226 Difference]: Without dead ends: 53 [2018-10-04 09:17:32,314 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-10-04 09:17:32,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-04 09:17:32,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-04 09:17:32,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-04 09:17:32,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-10-04 09:17:32,320 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2018-10-04 09:17:32,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:17:32,321 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-10-04 09:17:32,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-04 09:17:32,321 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-10-04 09:17:32,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-04 09:17:32,322 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:17:32,322 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1] [2018-10-04 09:17:32,322 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:17:32,322 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:17:32,323 INFO L82 PathProgramCache]: Analyzing trace with hash 725428023, now seen corresponding path program 24 times [2018-10-04 09:17:32,323 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:17:32,323 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:17:32,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:32,324 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:17:32,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:32,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:17:33,134 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:33,134 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:17:33,134 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 09:17:33,141 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:17:56,665 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-04 09:17:56,665 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:17:56,676 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:17:56,711 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:56,741 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:17:56,742 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-04 09:17:56,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-04 09:17:56,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-04 09:17:56,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-10-04 09:17:56,743 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 27 states. [2018-10-04 09:17:57,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:17:57,226 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-10-04 09:17:57,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-04 09:17:57,226 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2018-10-04 09:17:57,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:17:57,227 INFO L225 Difference]: With dead ends: 57 [2018-10-04 09:17:57,227 INFO L226 Difference]: Without dead ends: 55 [2018-10-04 09:17:57,228 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-10-04 09:17:57,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-04 09:17:57,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-10-04 09:17:57,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-04 09:17:57,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-10-04 09:17:57,235 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2018-10-04 09:17:57,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:17:57,236 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-10-04 09:17:57,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-04 09:17:57,236 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-10-04 09:17:57,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-04 09:17:57,236 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:17:57,237 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1] [2018-10-04 09:17:57,237 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:17:57,237 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:17:57,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1351680241, now seen corresponding path program 25 times [2018-10-04 09:17:57,237 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:17:57,237 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:17:57,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:57,238 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:17:57,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:57,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:17:57,946 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:57,946 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:17:57,946 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 09:17:57,954 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:17:57,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:17:57,982 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:17:58,003 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:58,023 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:17:58,023 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-04 09:17:58,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-04 09:17:58,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-04 09:17:58,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-10-04 09:17:58,024 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 28 states. [2018-10-04 09:17:58,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:17:58,487 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-10-04 09:17:58,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-04 09:17:58,487 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-10-04 09:17:58,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:17:58,488 INFO L225 Difference]: With dead ends: 59 [2018-10-04 09:17:58,489 INFO L226 Difference]: Without dead ends: 57 [2018-10-04 09:17:58,489 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-10-04 09:17:58,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-04 09:17:58,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-04 09:17:58,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-04 09:17:58,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-10-04 09:17:58,494 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2018-10-04 09:17:58,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:17:58,495 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-10-04 09:17:58,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-04 09:17:58,495 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-10-04 09:17:58,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-04 09:17:58,495 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:17:58,495 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1] [2018-10-04 09:17:58,496 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:17:58,496 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:17:58,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1884640299, now seen corresponding path program 26 times [2018-10-04 09:17:58,496 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:17:58,496 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:17:58,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:58,497 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:17:58,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:58,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:17:59,074 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:59,074 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:17:59,074 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 09:17:59,082 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:17:59,110 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:17:59,110 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:17:59,112 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:17:59,143 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:59,164 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:17:59,164 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-04 09:17:59,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-04 09:17:59,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-04 09:17:59,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-10-04 09:17:59,166 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 29 states. [2018-10-04 09:17:59,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:17:59,852 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-10-04 09:17:59,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-04 09:17:59,853 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2018-10-04 09:17:59,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:17:59,853 INFO L225 Difference]: With dead ends: 61 [2018-10-04 09:17:59,853 INFO L226 Difference]: Without dead ends: 59 [2018-10-04 09:17:59,854 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-10-04 09:17:59,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-04 09:17:59,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-04 09:17:59,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-04 09:17:59,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-10-04 09:17:59,859 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2018-10-04 09:17:59,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:17:59,859 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-10-04 09:17:59,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-04 09:17:59,859 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-10-04 09:17:59,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-04 09:17:59,860 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:17:59,860 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1] [2018-10-04 09:17:59,860 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:17:59,861 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:17:59,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1336819483, now seen corresponding path program 27 times [2018-10-04 09:17:59,861 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:17:59,861 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:17:59,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:59,862 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:17:59,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:59,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:18:00,436 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:18:00,437 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:18:00,437 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 09:18:00,445 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:18:09,916 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-10-04 09:18:09,916 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:18:10,162 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:18:10,180 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:18:10,201 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:18:10,201 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-04 09:18:10,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-04 09:18:10,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-04 09:18:10,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2018-10-04 09:18:10,202 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 30 states. [2018-10-04 09:18:10,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:18:10,733 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-10-04 09:18:10,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-04 09:18:10,734 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-10-04 09:18:10,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:18:10,735 INFO L225 Difference]: With dead ends: 63 [2018-10-04 09:18:10,735 INFO L226 Difference]: Without dead ends: 61 [2018-10-04 09:18:10,736 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2018-10-04 09:18:10,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-04 09:18:10,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-04 09:18:10,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-04 09:18:10,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-10-04 09:18:10,741 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2018-10-04 09:18:10,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:18:10,741 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-10-04 09:18:10,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-04 09:18:10,742 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-10-04 09:18:10,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-04 09:18:10,742 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:18:10,742 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1] [2018-10-04 09:18:10,743 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:18:10,743 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:18:10,743 INFO L82 PathProgramCache]: Analyzing trace with hash -488249569, now seen corresponding path program 28 times [2018-10-04 09:18:10,743 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:18:10,743 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:18:10,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:18:10,744 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:18:10,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:18:10,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:18:11,354 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:18:11,355 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:18:11,355 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 09:18:11,363 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:18:11,390 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:18:11,390 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:18:11,392 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:18:11,409 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:18:11,430 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:18:11,430 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-04 09:18:11,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-04 09:18:11,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-04 09:18:11,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-10-04 09:18:11,431 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 31 states. [2018-10-04 09:18:12,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:18:12,018 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-10-04 09:18:12,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-04 09:18:12,019 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2018-10-04 09:18:12,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:18:12,020 INFO L225 Difference]: With dead ends: 65 [2018-10-04 09:18:12,020 INFO L226 Difference]: Without dead ends: 63 [2018-10-04 09:18:12,021 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-10-04 09:18:12,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-04 09:18:12,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-10-04 09:18:12,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-04 09:18:12,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-10-04 09:18:12,025 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2018-10-04 09:18:12,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:18:12,025 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-10-04 09:18:12,025 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-04 09:18:12,025 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-10-04 09:18:12,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-04 09:18:12,026 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:18:12,026 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1] [2018-10-04 09:18:12,026 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:18:12,026 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:18:12,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1056348455, now seen corresponding path program 29 times [2018-10-04 09:18:12,027 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:18:12,027 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:18:12,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:18:12,028 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:18:12,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:18:12,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:18:12,683 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:18:12,683 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:18:12,683 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 09:18:12,692 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown