java -Xss4m -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/chc/AutomizerCHC/AutomizerCHC_Goto.epf -i /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_2_e1_1116.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-14921ce [2018-06-25 16:35:35,957 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-25 16:35:35,964 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-25 16:35:35,978 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-25 16:35:35,979 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-25 16:35:35,980 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-25 16:35:35,981 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-25 16:35:35,985 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-25 16:35:35,986 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-25 16:35:35,987 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-25 16:35:35,988 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-25 16:35:35,988 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-25 16:35:35,989 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-25 16:35:35,990 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-25 16:35:35,994 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-25 16:35:35,995 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-25 16:35:35,996 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-25 16:35:36,009 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-25 16:35:36,011 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-25 16:35:36,012 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-25 16:35:36,013 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-25 16:35:36,015 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-25 16:35:36,015 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-25 16:35:36,015 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-25 16:35:36,016 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-25 16:35:36,021 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-25 16:35:36,021 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-25 16:35:36,022 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-25 16:35:36,023 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-25 16:35:36,023 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-25 16:35:36,027 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-25 16:35:36,028 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-25 16:35:36,028 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-25 16:35:36,029 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-25 16:35:36,029 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-25 16:35:36,030 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-25 16:35:36,052 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-25 16:35:36,052 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-25 16:35:36,052 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-25 16:35:36,052 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-25 16:35:36,056 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-25 16:35:36,056 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-25 16:35:36,056 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-25 16:35:36,057 INFO L133 SettingsManager]: * Use SBE=true [2018-06-25 16:35:36,057 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-25 16:35:36,057 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-25 16:35:36,057 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-25 16:35:36,057 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-25 16:35:36,058 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-25 16:35:36,058 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-25 16:35:36,058 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-25 16:35:36,058 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-25 16:35:36,058 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-25 16:35:36,059 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-25 16:35:36,060 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-25 16:35:36,060 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-25 16:35:36,060 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-25 16:35:36,061 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-25 16:35:36,062 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-25 16:35:36,108 INFO ]: Repository-Root is: /tmp [2018-06-25 16:35:36,128 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-25 16:35:36,132 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-25 16:35:36,134 INFO ]: Initializing SmtParser... [2018-06-25 16:35:36,134 INFO ]: SmtParser initialized [2018-06-25 16:35:36,135 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_2_e1_1116.smt2 [2018-06-25 16:35:36,136 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 [2018-06-25 16:35:36,220 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_2_e1_1116.smt2 unknown [2018-06-25 16:35:36,677 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_2_e1_1116.smt2 [2018-06-25 16:35:36,682 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-25 16:35:36,692 INFO ]: Walking toolchain with 4 elements. [2018-06-25 16:35:36,702 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-25 16:35:36,702 INFO ]: Initializing ChcToBoogie... [2018-06-25 16:35:36,702 INFO ]: ChcToBoogie initialized [2018-06-25 16:35:36,707 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 04:35:36" (1/1) ... [2018-06-25 16:35:36,803 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:35:36 Unit [2018-06-25 16:35:36,804 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-25 16:35:36,804 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-25 16:35:36,804 INFO ]: Initializing Boogie Preprocessor... [2018-06-25 16:35:36,804 INFO ]: Boogie Preprocessor initialized [2018-06-25 16:35:36,845 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:35:36" (1/1) ... [2018-06-25 16:35:36,845 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:35:36" (1/1) ... [2018-06-25 16:35:36,866 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:35:36" (1/1) ... [2018-06-25 16:35:36,866 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:35:36" (1/1) ... [2018-06-25 16:35:36,873 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:35:36" (1/1) ... [2018-06-25 16:35:36,875 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:35:36" (1/1) ... [2018-06-25 16:35:36,877 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:35:36" (1/1) ... [2018-06-25 16:35:36,880 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-25 16:35:36,881 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-25 16:35:36,881 INFO ]: Initializing RCFGBuilder... [2018-06-25 16:35:36,881 INFO ]: RCFGBuilder initialized [2018-06-25 16:35:36,882 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:35:36" (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) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-25 16:35:36,896 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-25 16:35:36,896 INFO ]: Found specification of procedure gotoProc [2018-06-25 16:35:36,896 INFO ]: Found implementation of procedure gotoProc [2018-06-25 16:35:36,896 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-25 16:35:36,896 INFO ]: Found specification of procedure Ultimate.START [2018-06-25 16:35:36,896 INFO ]: Found implementation of procedure Ultimate.START [2018-06-25 16:35:37,332 INFO ]: Using library mode [2018-06-25 16:35:37,332 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 04:35:37 BoogieIcfgContainer [2018-06-25 16:35:37,332 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-25 16:35:37,335 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-25 16:35:37,335 INFO ]: Initializing TraceAbstraction... [2018-06-25 16:35:37,338 INFO ]: TraceAbstraction initialized [2018-06-25 16:35:37,338 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 04:35:36" (1/3) ... [2018-06-25 16:35:37,339 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61ebaaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 25.06 04:35:37, skipping insertion in model container [2018-06-25 16:35:37,339 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:35:36" (2/3) ... [2018-06-25 16:35:37,339 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61ebaaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.06 04:35:37, skipping insertion in model container [2018-06-25 16:35:37,339 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 04:35:37" (3/3) ... [2018-06-25 16:35:37,341 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-25 16:35:37,350 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-25 16:35:37,360 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-25 16:35:37,414 INFO ]: Using default assertion order modulation [2018-06-25 16:35:37,415 INFO ]: Interprodecural is true [2018-06-25 16:35:37,415 INFO ]: Hoare is false [2018-06-25 16:35:37,415 INFO ]: Compute interpolants for FPandBP [2018-06-25 16:35:37,415 INFO ]: Backedges is TWOTRACK [2018-06-25 16:35:37,415 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-25 16:35:37,415 INFO ]: Difference is false [2018-06-25 16:35:37,415 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-25 16:35:37,415 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-25 16:35:37,432 INFO ]: Start isEmpty. Operand 10 states. [2018-06-25 16:35:37,449 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-25 16:35:37,449 INFO ]: Found error trace [2018-06-25 16:35:37,452 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-25 16:35:37,453 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 16:35:37,458 INFO ]: Analyzing trace with hash 1284994894, now seen corresponding path program 1 times [2018-06-25 16:35:37,460 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 16:35:37,461 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 16:35:37,507 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:35:37,507 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 16:35:37,507 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:35:37,632 INFO ]: Conjunction of SSA is unsat [2018-06-25 16:35:37,739 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 16:35:37,741 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-25 16:35:37,741 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-25 16:35:37,742 INFO ]: Interpolant automaton has 3 states [2018-06-25 16:35:37,753 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-25 16:35:37,754 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 16:35:37,757 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-25 16:35:37,840 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 16:35:37,840 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-25 16:35:37,840 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-25 16:35:37,842 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-25 16:35:37,842 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 16:35:37,855 INFO ]: With dead ends: 9 [2018-06-25 16:35:37,855 INFO ]: Without dead ends: 9 [2018-06-25 16:35:37,857 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 16:35:37,871 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-25 16:35:37,892 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-25 16:35:37,893 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-25 16:35:37,894 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-25 16:35:37,894 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-25 16:35:37,895 INFO ]: Finished accepts. word is rejected. [2018-06-25 16:35:37,895 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-25 16:35:37,895 INFO ]: Interpolant automaton has 3 states. [2018-06-25 16:35:37,895 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-25 16:35:37,895 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-25 16:35:37,895 INFO ]: Found error trace [2018-06-25 16:35:37,895 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 16:35:37,895 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 16:35:37,895 INFO ]: Analyzing trace with hash 1180964567, now seen corresponding path program 1 times [2018-06-25 16:35:37,895 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 16:35:37,895 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 16:35:37,896 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:35:37,896 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 16:35:37,896 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:35:38,070 INFO ]: Conjunction of SSA is unsat [2018-06-25 16:35:38,370 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 16:35:38,370 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 16:35:38,370 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) [2018-06-25 16:35:38,383 INFO ]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 16:35:38,546 INFO ]: Conjunction of SSA is unsat [2018-06-25 16:35:38,559 INFO ]: Computing forward predicates... [2018-06-25 16:35:38,932 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 16:35:38,971 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 16:35:38,971 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-06-25 16:35:38,972 INFO ]: Interpolant automaton has 6 states [2018-06-25 16:35:38,972 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-25 16:35:38,972 INFO ]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-06-25 16:35:38,972 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 6 states. [2018-06-25 16:35:39,155 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 16:35:39,155 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-25 16:35:39,156 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-25 16:35:39,156 INFO ]: Start accepts. Automaton has 6 states. Word has length 8 [2018-06-25 16:35:39,157 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 16:35:39,157 INFO ]: With dead ends: 11 [2018-06-25 16:35:39,157 INFO ]: Without dead ends: 11 [2018-06-25 16:35:39,158 INFO ]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-06-25 16:35:39,158 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-25 16:35:39,159 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-25 16:35:39,159 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-25 16:35:39,159 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-25 16:35:39,159 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-06-25 16:35:39,159 INFO ]: Finished accepts. word is rejected. [2018-06-25 16:35:39,159 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-25 16:35:39,159 INFO ]: Interpolant automaton has 6 states. [2018-06-25 16:35:39,159 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-25 16:35:39,160 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-25 16:35:39,160 INFO ]: Found error trace [2018-06-25 16:35:39,160 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 16:35:39,160 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 16:35:39,160 INFO ]: Analyzing trace with hash 1062095287, now seen corresponding path program 2 times [2018-06-25 16:35:39,160 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 16:35:39,160 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 16:35:39,163 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:35:39,163 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 16:35:39,163 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:35:39,356 INFO ]: Conjunction of SSA is unsat [2018-06-25 16:35:40,487 WARN ]: Spent 847.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 15 [2018-06-25 16:35:41,389 WARN ]: Spent 816.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 15 [2018-06-25 16:35:41,396 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 16:35:41,396 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 16:35:41,396 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 [2018-06-25 16:35:41,404 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-25 16:35:41,613 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-25 16:35:41,613 INFO ]: Conjunction of SSA is unsat [2018-06-25 16:35:41,620 INFO ]: Computing forward predicates... [2018-06-25 16:35:41,955 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 16:35:41,977 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 16:35:41,977 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2018-06-25 16:35:41,977 INFO ]: Interpolant automaton has 10 states [2018-06-25 16:35:41,977 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-25 16:35:41,977 INFO ]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-06-25 16:35:41,977 INFO ]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-06-25 16:35:42,101 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 16:35:42,101 INFO ]: Finished difference Result 13 states and 13 transitions. [2018-06-25 16:35:42,101 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-25 16:35:42,101 INFO ]: Start accepts. Automaton has 10 states. Word has length 10 [2018-06-25 16:35:42,101 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 16:35:42,102 INFO ]: With dead ends: 13 [2018-06-25 16:35:42,102 INFO ]: Without dead ends: 13 [2018-06-25 16:35:42,102 INFO ]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2018-06-25 16:35:42,102 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-25 16:35:42,103 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-25 16:35:42,104 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-25 16:35:42,104 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-06-25 16:35:42,104 INFO ]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-06-25 16:35:42,104 INFO ]: Finished accepts. word is rejected. [2018-06-25 16:35:42,104 INFO ]: Abstraction has 13 states and 13 transitions. [2018-06-25 16:35:42,104 INFO ]: Interpolant automaton has 10 states. [2018-06-25 16:35:42,104 INFO ]: Start isEmpty. Operand 13 states and 13 transitions. [2018-06-25 16:35:42,105 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-25 16:35:42,105 INFO ]: Found error trace [2018-06-25 16:35:42,105 INFO ]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 16:35:42,105 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 16:35:42,105 INFO ]: Analyzing trace with hash -1502133097, now seen corresponding path program 3 times [2018-06-25 16:35:42,105 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 16:35:42,105 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 16:35:42,106 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:35:42,106 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 16:35:42,106 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:35:42,473 INFO ]: Conjunction of SSA is unsat Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown