java -Xmx4000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCHC.xml --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/chccomp2018/chcToBoogie_automizer.epf -i /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_3_e3_1275_e6_1315.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-55b8104 [2018-06-18 16:11:52,371 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-18 16:11:52,373 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-18 16:11:52,385 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-18 16:11:52,385 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-18 16:11:52,386 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-18 16:11:52,387 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-18 16:11:52,389 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-18 16:11:52,391 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-18 16:11:52,392 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-18 16:11:52,392 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-18 16:11:52,393 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-18 16:11:52,394 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-18 16:11:52,395 INFO L177 SettingsManager]: ChcToBoogie provides no preferences, ignoring... [2018-06-18 16:11:52,395 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-18 16:11:52,396 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-18 16:11:52,398 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-18 16:11:52,400 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-18 16:11:52,401 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-18 16:11:52,402 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-18 16:11:52,403 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-18 16:11:52,406 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-18 16:11:52,406 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-18 16:11:52,407 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-18 16:11:52,408 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-18 16:11:52,409 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-18 16:11:52,409 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-18 16:11:52,410 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-18 16:11:52,411 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-18 16:11:52,411 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-18 16:11:52,412 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-18 16:11:52,413 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-18 16:11:52,413 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-18 16:11:52,414 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-18 16:11:52,415 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-18 16:11:52,415 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chccomp2018/chcToBoogie_automizer.epf [2018-06-18 16:11:52,428 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-18 16:11:52,428 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-18 16:11:52,429 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-18 16:11:52,429 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-18 16:11:52,430 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-18 16:11:52,431 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-18 16:11:52,431 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-18 16:11:52,431 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-18 16:11:52,432 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-18 16:11:52,432 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-18 16:11:52,432 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-18 16:11:52,432 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-18 16:11:52,433 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-18 16:11:52,433 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-18 16:11:52,433 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-18 16:11:52,433 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-18 16:11:52,434 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-18 16:11:52,435 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-18 16:11:52,435 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-18 16:11:52,478 INFO ]: Repository-Root is: /tmp [2018-06-18 16:11:52,494 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-18 16:11:52,499 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-18 16:11:52,500 INFO ]: Initializing SmtParser... [2018-06-18 16:11:52,500 INFO ]: SmtParser initialized [2018-06-18 16:11:52,500 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_3_e3_1275_e6_1315.smt2 [2018-06-18 16:11:52,501 INFO ]: Parsing .smt2 file as a set of Horn Clauses No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-06-18 16:11:52,591 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_3_e3_1275_e6_1315.smt2 unknown [2018-06-18 16:11:53,139 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_3_e3_1275_e6_1315.smt2 [2018-06-18 16:11:53,144 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-18 16:11:53,165 INFO ]: Walking toolchain with 4 elements. [2018-06-18 16:11:53,166 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-18 16:11:53,166 INFO ]: Initializing ChcToBoogie... [2018-06-18 16:11:53,166 INFO ]: ChcToBoogie initialized [2018-06-18 16:11:53,181 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 04:11:53" (1/1) ... [2018-06-18 16:11:53,257 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:11:53 Unit [2018-06-18 16:11:53,257 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-18 16:11:53,258 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-18 16:11:53,258 INFO ]: Initializing Boogie Preprocessor... [2018-06-18 16:11:53,258 INFO ]: Boogie Preprocessor initialized [2018-06-18 16:11:53,280 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:11:53" (1/1) ... [2018-06-18 16:11:53,280 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:11:53" (1/1) ... [2018-06-18 16:11:53,291 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:11:53" (1/1) ... [2018-06-18 16:11:53,292 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:11:53" (1/1) ... [2018-06-18 16:11:53,302 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:11:53" (1/1) ... [2018-06-18 16:11:53,303 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:11:53" (1/1) ... [2018-06-18 16:11:53,305 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:11:53" (1/1) ... [2018-06-18 16:11:53,308 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-18 16:11:53,309 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-18 16:11:53,309 INFO ]: Initializing RCFGBuilder... [2018-06-18 16:11:53,309 INFO ]: RCFGBuilder initialized [2018-06-18 16:11:53,312 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:11:53" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2018-06-18 16:11:53,337 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-18 16:11:53,337 INFO ]: Found specification of procedure False [2018-06-18 16:11:53,337 INFO ]: Found implementation of procedure False [2018-06-18 16:11:53,337 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-18 16:11:53,337 INFO ]: Found specification of procedure state [2018-06-18 16:11:53,337 INFO ]: Found implementation of procedure state [2018-06-18 16:11:53,338 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-18 16:11:53,338 INFO ]: Found specification of procedure Ultimate.START [2018-06-18 16:11:53,338 INFO ]: Found implementation of procedure Ultimate.START Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-18 16:11:53,723 INFO ]: Using library mode [2018-06-18 16:11:53,723 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 04:11:53 BoogieIcfgContainer [2018-06-18 16:11:53,723 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-18 16:11:53,726 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-18 16:11:53,726 INFO ]: Initializing TraceAbstraction... [2018-06-18 16:11:53,734 INFO ]: TraceAbstraction initialized [2018-06-18 16:11:53,735 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 04:11:53" (1/3) ... [2018-06-18 16:11:53,735 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43416ffc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 18.06 04:11:53, skipping insertion in model container [2018-06-18 16:11:53,736 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:11:53" (2/3) ... [2018-06-18 16:11:53,736 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43416ffc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.06 04:11:53, skipping insertion in model container [2018-06-18 16:11:53,736 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 04:11:53" (3/3) ... [2018-06-18 16:11:53,738 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-18 16:11:53,749 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-18 16:11:53,758 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-18 16:11:53,808 INFO ]: Using default assertion order modulation [2018-06-18 16:11:53,809 INFO ]: Interprodecural is true [2018-06-18 16:11:53,809 INFO ]: Hoare is false [2018-06-18 16:11:53,809 INFO ]: Compute interpolants for FPandBP [2018-06-18 16:11:53,809 INFO ]: Backedges is TWOTRACK [2018-06-18 16:11:53,809 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-18 16:11:53,809 INFO ]: Difference is false [2018-06-18 16:11:53,809 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-18 16:11:53,809 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-18 16:11:53,826 INFO ]: Start isEmpty. Operand 13 states. [2018-06-18 16:11:53,844 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-18 16:11:53,845 INFO ]: Found error trace [2018-06-18 16:11:53,845 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 16:11:53,846 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 16:11:53,852 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-18 16:11:53,854 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 16:11:53,854 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 16:11:53,910 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:11:53,910 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 16:11:53,910 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:11:54,038 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:11:54,048 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 16:11:54,231 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-18 16:11:54,234 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-18 16:11:54,234 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-18 16:11:54,235 INFO ]: Interpolant automaton has 4 states [2018-06-18 16:11:54,247 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-18 16:11:54,247 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-18 16:11:54,249 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-18 16:11:54,370 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 16:11:54,370 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-18 16:11:54,371 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-18 16:11:54,373 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-18 16:11:54,373 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 16:11:54,385 INFO ]: With dead ends: 13 [2018-06-18 16:11:54,385 INFO ]: Without dead ends: 13 [2018-06-18 16:11:54,386 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-18 16:11:54,399 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-18 16:11:54,433 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-18 16:11:54,434 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-18 16:11:54,437 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-18 16:11:54,438 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-18 16:11:54,438 INFO ]: Finished accepts. word is rejected. [2018-06-18 16:11:54,438 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-18 16:11:54,438 INFO ]: Interpolant automaton has 4 states. [2018-06-18 16:11:54,438 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-18 16:11:54,441 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-18 16:11:54,441 INFO ]: Found error trace [2018-06-18 16:11:54,441 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 16:11:54,442 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 16:11:54,442 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-18 16:11:54,442 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 16:11:54,442 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 16:11:54,443 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:11:54,443 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 16:11:54,443 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:11:54,544 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:11:54,545 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 16:11:54,822 WARN ]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-06-18 16:11:54,876 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 16:11:54,876 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 16:11:54,876 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-18 16:11:54,893 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 16:11:55,037 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:11:55,048 INFO ]: Computing forward predicates... [2018-06-18 16:11:55,651 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 16:11:55,674 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 16:11:55,674 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-06-18 16:11:55,674 INFO ]: Interpolant automaton has 9 states [2018-06-18 16:11:55,674 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-18 16:11:55,675 INFO ]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-06-18 16:11:55,675 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 9 states. [2018-06-18 16:11:56,013 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 16:11:56,013 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-18 16:11:56,015 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-18 16:11:56,015 INFO ]: Start accepts. Automaton has 9 states. Word has length 13 [2018-06-18 16:11:56,015 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 16:11:56,016 INFO ]: With dead ends: 15 [2018-06-18 16:11:56,016 INFO ]: Without dead ends: 15 [2018-06-18 16:11:56,017 INFO ]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2018-06-18 16:11:56,017 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-18 16:11:56,020 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-18 16:11:56,020 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-18 16:11:56,020 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-18 16:11:56,020 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-18 16:11:56,020 INFO ]: Finished accepts. word is rejected. [2018-06-18 16:11:56,020 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-18 16:11:56,021 INFO ]: Interpolant automaton has 9 states. [2018-06-18 16:11:56,021 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-18 16:11:56,021 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-18 16:11:56,021 INFO ]: Found error trace [2018-06-18 16:11:56,021 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 16:11:56,021 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 16:11:56,021 INFO ]: Analyzing trace with hash -1486246934, now seen corresponding path program 2 times [2018-06-18 16:11:56,021 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 16:11:56,022 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 16:11:56,022 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:11:56,022 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 16:11:56,023 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:11:56,148 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:11:56,149 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 16:11:56,562 WARN ]: Spent 158.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2018-06-18 16:11:56,854 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-18 16:11:56,854 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 16:11:56,854 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-18 16:11:56,862 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-18 16:11:56,991 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-18 16:11:56,991 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:11:56,997 INFO ]: Computing forward predicates... [2018-06-18 16:11:57,343 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-18 16:11:57,364 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 16:11:57,364 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2018-06-18 16:11:57,364 INFO ]: Interpolant automaton has 13 states [2018-06-18 16:11:57,365 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-18 16:11:57,365 INFO ]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2018-06-18 16:11:57,365 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 13 states. [2018-06-18 16:11:57,602 WARN ]: Spent 137.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 30 [2018-06-18 16:11:57,680 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 16:11:57,680 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-18 16:11:57,680 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-18 16:11:57,680 INFO ]: Start accepts. Automaton has 13 states. Word has length 17 [2018-06-18 16:11:57,680 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 16:11:57,681 INFO ]: With dead ends: 17 [2018-06-18 16:11:57,681 INFO ]: Without dead ends: 17 [2018-06-18 16:11:57,681 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2018-06-18 16:11:57,681 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-18 16:11:57,684 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-18 16:11:57,684 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-18 16:11:57,685 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-18 16:11:57,685 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-18 16:11:57,685 INFO ]: Finished accepts. word is rejected. [2018-06-18 16:11:57,685 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-18 16:11:57,685 INFO ]: Interpolant automaton has 13 states. [2018-06-18 16:11:57,685 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-18 16:11:57,686 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-18 16:11:57,686 INFO ]: Found error trace [2018-06-18 16:11:57,686 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 16:11:57,686 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 16:11:57,686 INFO ]: Analyzing trace with hash -2056434034, now seen corresponding path program 3 times [2018-06-18 16:11:57,686 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 16:11:57,686 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 16:11:57,687 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:11:57,687 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 16:11:57,687 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:11:57,810 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:11:57,811 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 16:11:58,204 WARN ]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-06-18 16:11:58,566 WARN ]: Spent 282.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2018-06-18 16:11:58,746 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-18 16:11:58,747 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 16:11:58,761 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-06-18 16:11:58,771 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-18 16:11:58,942 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-18 16:11:58,942 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:11:58,950 INFO ]: Computing forward predicates... [2018-06-18 16:11:59,304 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-18 16:11:59,328 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 16:11:59,328 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2018-06-18 16:11:59,329 INFO ]: Interpolant automaton has 17 states [2018-06-18 16:11:59,329 INFO ]: Constructing interpolant automaton starting with 17 interpolants. [2018-06-18 16:11:59,329 INFO ]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2018-06-18 16:11:59,329 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 17 states. [2018-06-18 16:11:59,645 WARN ]: Spent 100.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2018-06-18 16:11:59,917 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 16:11:59,917 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-18 16:11:59,917 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-18 16:11:59,917 INFO ]: Start accepts. Automaton has 17 states. Word has length 21 [2018-06-18 16:11:59,917 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 16:11:59,918 INFO ]: With dead ends: 19 [2018-06-18 16:11:59,918 INFO ]: Without dead ends: 19 [2018-06-18 16:11:59,918 INFO ]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2018-06-18 16:11:59,918 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-18 16:11:59,924 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-18 16:11:59,924 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-18 16:11:59,924 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-18 16:11:59,924 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-18 16:11:59,924 INFO ]: Finished accepts. word is rejected. [2018-06-18 16:11:59,924 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-18 16:11:59,924 INFO ]: Interpolant automaton has 17 states. [2018-06-18 16:11:59,924 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-18 16:11:59,925 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-18 16:11:59,925 INFO ]: Found error trace [2018-06-18 16:11:59,925 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 16:11:59,925 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 16:11:59,925 INFO ]: Analyzing trace with hash -434924750, now seen corresponding path program 4 times [2018-06-18 16:11:59,925 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 16:11:59,925 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 16:11:59,927 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:11:59,927 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 16:11:59,927 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:12:00,101 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:12:00,103 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 16:12:00,991 WARN ]: Spent 411.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 16 [2018-06-18 16:12:01,470 WARN ]: Spent 171.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 22 [2018-06-18 16:12:01,585 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-18 16:12:01,585 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 16:12:01,585 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-18 16:12:01,591 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-18 16:12:01,759 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-18 16:12:01,759 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:12:01,766 INFO ]: Computing forward predicates... [2018-06-18 16:12:02,275 INFO ]: Checked inductivity of 36 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-06-18 16:12:02,296 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 16:12:02,297 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2018-06-18 16:12:02,297 INFO ]: Interpolant automaton has 20 states [2018-06-18 16:12:02,297 INFO ]: Constructing interpolant automaton starting with 20 interpolants. [2018-06-18 16:12:02,297 INFO ]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2018-06-18 16:12:02,297 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 20 states. [2018-06-18 16:12:02,567 WARN ]: Spent 101.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 69 [2018-06-18 16:12:02,953 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 16:12:02,953 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-18 16:12:02,954 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-18 16:12:02,954 INFO ]: Start accepts. Automaton has 20 states. Word has length 25 [2018-06-18 16:12:02,954 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 16:12:02,954 INFO ]: With dead ends: 21 [2018-06-18 16:12:02,954 INFO ]: Without dead ends: 21 [2018-06-18 16:12:02,955 INFO ]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2018-06-18 16:12:02,955 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-18 16:12:02,958 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-18 16:12:02,959 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-18 16:12:02,959 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-18 16:12:02,959 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 25 [2018-06-18 16:12:02,959 INFO ]: Finished accepts. word is rejected. [2018-06-18 16:12:02,960 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-18 16:12:02,960 INFO ]: Interpolant automaton has 20 states. [2018-06-18 16:12:02,960 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-18 16:12:02,960 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-18 16:12:02,960 INFO ]: Found error trace [2018-06-18 16:12:02,960 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 16:12:02,961 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 16:12:02,961 INFO ]: Analyzing trace with hash 1986427350, now seen corresponding path program 5 times [2018-06-18 16:12:02,961 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 16:12:02,961 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 16:12:02,961 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:12:02,961 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 16:12:02,961 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:12:03,249 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:12:03,250 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 16:12:04,140 WARN ]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-06-18 16:12:05,324 WARN ]: Spent 1.09 s on a formula simplification. DAG size of input: 119 DAG size of output: 16 [2018-06-18 16:12:05,716 WARN ]: Spent 364.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 25 [2018-06-18 16:12:05,964 WARN ]: Spent 190.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 20 [2018-06-18 16:12:06,321 WARN ]: Spent 316.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 24 [2018-06-18 16:12:06,755 WARN ]: Spent 280.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 20 [2018-06-18 16:12:07,149 WARN ]: Spent 315.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 16 [2018-06-18 16:12:07,863 WARN ]: Spent 608.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 25 [2018-06-18 16:12:08,274 WARN ]: Spent 209.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 8 [2018-06-18 16:12:08,289 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-18 16:12:08,289 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 16:12:08,289 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-18 16:12:08,296 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-18 16:12:08,490 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-06-18 16:12:08,490 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:12:08,500 INFO ]: Computing forward predicates... [2018-06-18 16:12:08,982 INFO ]: Checked inductivity of 55 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-06-18 16:12:09,004 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 16:12:09,006 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2018-06-18 16:12:09,007 INFO ]: Interpolant automaton has 24 states [2018-06-18 16:12:09,007 INFO ]: Constructing interpolant automaton starting with 24 interpolants. [2018-06-18 16:12:09,007 INFO ]: CoverageRelationStatistics Valid=51, Invalid=501, Unknown=0, NotChecked=0, Total=552 [2018-06-18 16:12:09,007 INFO ]: Start difference. First operand 21 states and 22 transitions. Second operand 24 states. [2018-06-18 16:12:09,185 WARN ]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2018-06-18 16:12:09,557 WARN ]: Spent 292.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 102 [2018-06-18 16:12:09,961 WARN ]: Spent 238.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 95 [2018-06-18 16:12:10,290 WARN ]: Spent 176.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 89 [2018-06-18 16:12:10,469 WARN ]: Spent 144.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 76 [2018-06-18 16:12:10,629 WARN ]: Spent 124.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2018-06-18 16:12:10,678 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 16:12:10,678 INFO ]: Finished difference Result 23 states and 24 transitions. [2018-06-18 16:12:10,679 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-18 16:12:10,679 INFO ]: Start accepts. Automaton has 24 states. Word has length 29 [2018-06-18 16:12:10,679 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 16:12:10,680 INFO ]: With dead ends: 23 [2018-06-18 16:12:10,680 INFO ]: Without dead ends: 23 [2018-06-18 16:12:10,680 INFO ]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=173, Invalid=757, Unknown=0, NotChecked=0, Total=930 [2018-06-18 16:12:10,680 INFO ]: Start minimizeSevpa. Operand 23 states. [2018-06-18 16:12:10,684 INFO ]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-06-18 16:12:10,684 INFO ]: Start removeUnreachable. Operand 23 states. [2018-06-18 16:12:10,684 INFO ]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-06-18 16:12:10,685 INFO ]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 29 [2018-06-18 16:12:10,685 INFO ]: Finished accepts. word is rejected. [2018-06-18 16:12:10,685 INFO ]: Abstraction has 23 states and 24 transitions. [2018-06-18 16:12:10,685 INFO ]: Interpolant automaton has 24 states. [2018-06-18 16:12:10,685 INFO ]: Start isEmpty. Operand 23 states and 24 transitions. [2018-06-18 16:12:10,685 INFO ]: Finished isEmpty. Found accepting run of length 34 [2018-06-18 16:12:10,686 INFO ]: Found error trace [2018-06-18 16:12:10,686 INFO ]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 16:12:10,686 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 16:12:10,686 INFO ]: Analyzing trace with hash 800064122, now seen corresponding path program 6 times [2018-06-18 16:12:10,686 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 16:12:10,686 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 16:12:10,686 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:12:10,686 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 16:12:10,686 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:12:11,541 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:12:11,543 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 16:12:13,449 WARN ]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-06-18 16:12:14,052 WARN ]: Spent 532.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 16 [2018-06-18 16:12:21,975 WARN ]: Spent 7.50 s on a formula simplification. DAG size of input: 824 DAG size of output: 24 [2018-06-18 16:12:25,129 WARN ]: Spent 2.32 s on a formula simplification. DAG size of input: 675 DAG size of output: 25 [2018-06-18 16:12:27,892 WARN ]: Spent 2.50 s on a formula simplification. DAG size of input: 673 DAG size of output: 23 [2018-06-18 16:12:34,350 WARN ]: Spent 6.03 s on a formula simplification. DAG size of input: 1370 DAG size of output: 24 [2018-06-18 16:12:42,948 WARN ]: Spent 7.98 s on a formula simplification. DAG size of input: 1424 DAG size of output: 24 [2018-06-18 16:12:47,140 WARN ]: Spent 3.90 s on a formula simplification. DAG size of input: 514 DAG size of output: 15 [2018-06-18 16:12:47,198 INFO ]: Checked inductivity of 78 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-06-18 16:12:47,198 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 16:12:47,198 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-18 16:12:47,237 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-18 16:12:47,568 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-06-18 16:12:47,568 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:12:47,578 INFO ]: Computing forward predicates... [2018-06-18 16:12:47,980 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-18 16:12:48,012 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 16:12:48,012 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 27 [2018-06-18 16:12:48,012 INFO ]: Interpolant automaton has 27 states [2018-06-18 16:12:48,013 INFO ]: Constructing interpolant automaton starting with 27 interpolants. [2018-06-18 16:12:48,013 INFO ]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2018-06-18 16:12:48,013 INFO ]: Start difference. First operand 23 states and 24 transitions. Second operand 27 states. [2018-06-18 16:12:48,186 WARN ]: Spent 100.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-06-18 16:12:48,411 WARN ]: Spent 141.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 73 [2018-06-18 16:12:48,570 WARN ]: Spent 130.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2018-06-18 16:12:48,734 WARN ]: Spent 133.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 72 [2018-06-18 16:12:48,887 WARN ]: Spent 115.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2018-06-18 16:12:49,026 WARN ]: Spent 101.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2018-06-18 16:12:49,319 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 16:12:49,319 INFO ]: Finished difference Result 25 states and 26 transitions. [2018-06-18 16:12:49,320 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-18 16:12:49,320 INFO ]: Start accepts. Automaton has 27 states. Word has length 33 [2018-06-18 16:12:49,320 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 16:12:49,321 INFO ]: With dead ends: 25 [2018-06-18 16:12:49,321 INFO ]: Without dead ends: 25 [2018-06-18 16:12:49,321 INFO ]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 34.0s TimeCoverageRelationStatistics Valid=236, Invalid=954, Unknown=0, NotChecked=0, Total=1190 [2018-06-18 16:12:49,321 INFO ]: Start minimizeSevpa. Operand 25 states. [2018-06-18 16:12:49,327 INFO ]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-06-18 16:12:49,327 INFO ]: Start removeUnreachable. Operand 25 states. [2018-06-18 16:12:49,328 INFO ]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-06-18 16:12:49,328 INFO ]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 33 [2018-06-18 16:12:49,328 INFO ]: Finished accepts. word is rejected. [2018-06-18 16:12:49,328 INFO ]: Abstraction has 25 states and 26 transitions. [2018-06-18 16:12:49,328 INFO ]: Interpolant automaton has 27 states. [2018-06-18 16:12:49,328 INFO ]: Start isEmpty. Operand 25 states and 26 transitions. [2018-06-18 16:12:49,329 INFO ]: Finished isEmpty. Found accepting run of length 38 [2018-06-18 16:12:49,329 INFO ]: Found error trace [2018-06-18 16:12:49,329 INFO ]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 16:12:49,329 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 16:12:49,329 INFO ]: Analyzing trace with hash -411423458, now seen corresponding path program 7 times [2018-06-18 16:12:49,329 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 16:12:49,329 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 16:12:49,330 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:12:49,330 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 16:12:49,330 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:12:50,434 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:12:50,435 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown