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_4_e2_968_e5_991.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-14921ce [2018-06-25 16:51:18,878 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-25 16:51:18,881 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-25 16:51:18,896 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-25 16:51:18,897 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-25 16:51:18,902 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-25 16:51:18,903 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-25 16:51:18,908 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-25 16:51:18,909 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-25 16:51:18,912 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-25 16:51:18,912 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-25 16:51:18,913 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-25 16:51:18,914 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-25 16:51:18,924 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-25 16:51:18,925 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-25 16:51:18,926 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-25 16:51:18,928 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-25 16:51:18,944 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-25 16:51:18,953 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-25 16:51:18,954 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-25 16:51:18,955 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-25 16:51:18,957 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-25 16:51:18,957 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-25 16:51:18,958 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-25 16:51:18,959 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-25 16:51:18,959 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-25 16:51:18,967 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-25 16:51:18,968 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-25 16:51:18,969 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-25 16:51:18,970 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-25 16:51:18,976 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-25 16:51:18,977 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-25 16:51:18,977 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-25 16:51:18,978 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-25 16:51:18,978 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-25 16:51:18,979 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-25 16:51:18,998 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-25 16:51:18,998 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-25 16:51:18,998 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-25 16:51:18,998 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-25 16:51:19,000 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-25 16:51:19,000 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-25 16:51:19,000 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-25 16:51:19,000 INFO L133 SettingsManager]: * Use SBE=true [2018-06-25 16:51:19,000 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-25 16:51:19,001 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-25 16:51:19,001 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-25 16:51:19,001 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-25 16:51:19,001 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-25 16:51:19,002 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-25 16:51:19,002 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-25 16:51:19,002 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-25 16:51:19,002 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-25 16:51:19,002 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-25 16:51:19,002 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-25 16:51:19,003 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-25 16:51:19,003 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-25 16:51:19,004 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-25 16:51:19,004 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-25 16:51:19,041 INFO ]: Repository-Root is: /tmp [2018-06-25 16:51:19,061 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-25 16:51:19,065 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-25 16:51:19,067 INFO ]: Initializing SmtParser... [2018-06-25 16:51:19,067 INFO ]: SmtParser initialized [2018-06-25 16:51:19,068 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_4_e2_968_e5_991.smt2 [2018-06-25 16:51:19,069 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 16:51:19,207 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_4_e2_968_e5_991.smt2 unknown [2018-06-25 16:51:19,744 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_4_e2_968_e5_991.smt2 [2018-06-25 16:51:19,750 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-25 16:51:19,756 INFO ]: Walking toolchain with 4 elements. [2018-06-25 16:51:19,756 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-25 16:51:19,756 INFO ]: Initializing ChcToBoogie... [2018-06-25 16:51:19,757 INFO ]: ChcToBoogie initialized [2018-06-25 16:51:19,760 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 04:51:19" (1/1) ... [2018-06-25 16:51:19,857 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:51:19 Unit [2018-06-25 16:51:19,858 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-25 16:51:19,858 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-25 16:51:19,858 INFO ]: Initializing Boogie Preprocessor... [2018-06-25 16:51:19,859 INFO ]: Boogie Preprocessor initialized [2018-06-25 16:51:19,882 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:51:19" (1/1) ... [2018-06-25 16:51:19,883 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:51:19" (1/1) ... [2018-06-25 16:51:19,903 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:51:19" (1/1) ... [2018-06-25 16:51:19,903 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:51:19" (1/1) ... [2018-06-25 16:51:19,918 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:51:19" (1/1) ... [2018-06-25 16:51:19,920 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:51:19" (1/1) ... [2018-06-25 16:51:19,922 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:51:19" (1/1) ... [2018-06-25 16:51:19,929 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-25 16:51:19,929 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-25 16:51:19,929 INFO ]: Initializing RCFGBuilder... [2018-06-25 16:51:19,930 INFO ]: RCFGBuilder initialized [2018-06-25 16:51:19,930 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:51:19" (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 16:51:19,948 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-25 16:51:19,948 INFO ]: Found specification of procedure gotoProc [2018-06-25 16:51:19,948 INFO ]: Found implementation of procedure gotoProc [2018-06-25 16:51:19,948 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-25 16:51:19,948 INFO ]: Found specification of procedure Ultimate.START [2018-06-25 16:51:19,948 INFO ]: Found implementation of procedure Ultimate.START [2018-06-25 16:51:20,368 INFO ]: Using library mode [2018-06-25 16:51:20,368 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 04:51:20 BoogieIcfgContainer [2018-06-25 16:51:20,369 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-25 16:51:20,370 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-25 16:51:20,370 INFO ]: Initializing TraceAbstraction... [2018-06-25 16:51:20,374 INFO ]: TraceAbstraction initialized [2018-06-25 16:51:20,374 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 04:51:19" (1/3) ... [2018-06-25 16:51:20,375 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b56c230 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 25.06 04:51:20, skipping insertion in model container [2018-06-25 16:51:20,375 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:51:19" (2/3) ... [2018-06-25 16:51:20,375 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b56c230 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.06 04:51:20, skipping insertion in model container [2018-06-25 16:51:20,375 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 04:51:20" (3/3) ... [2018-06-25 16:51:20,377 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-25 16:51:20,391 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-25 16:51:20,407 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-25 16:51:20,463 INFO ]: Using default assertion order modulation [2018-06-25 16:51:20,464 INFO ]: Interprodecural is true [2018-06-25 16:51:20,464 INFO ]: Hoare is false [2018-06-25 16:51:20,464 INFO ]: Compute interpolants for FPandBP [2018-06-25 16:51:20,464 INFO ]: Backedges is TWOTRACK [2018-06-25 16:51:20,464 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-25 16:51:20,464 INFO ]: Difference is false [2018-06-25 16:51:20,464 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-25 16:51:20,464 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-25 16:51:20,479 INFO ]: Start isEmpty. Operand 10 states. [2018-06-25 16:51:20,501 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-25 16:51:20,501 INFO ]: Found error trace [2018-06-25 16:51:20,502 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-25 16:51:20,502 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 16:51:20,509 INFO ]: Analyzing trace with hash 1285054476, now seen corresponding path program 1 times [2018-06-25 16:51:20,511 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 16:51:20,512 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 16:51:20,565 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:51:20,565 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 16:51:20,565 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:51:20,697 INFO ]: Conjunction of SSA is unsat [2018-06-25 16:51:20,825 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 16:51:20,827 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-25 16:51:20,827 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-25 16:51:20,830 INFO ]: Interpolant automaton has 3 states [2018-06-25 16:51:20,843 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-25 16:51:20,844 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 16:51:20,848 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-25 16:51:20,961 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 16:51:20,961 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-25 16:51:20,962 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-25 16:51:20,963 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-25 16:51:20,964 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 16:51:20,977 INFO ]: With dead ends: 9 [2018-06-25 16:51:20,977 INFO ]: Without dead ends: 9 [2018-06-25 16:51:20,979 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 16:51:21,001 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-25 16:51:21,023 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-25 16:51:21,025 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-25 16:51:21,025 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-25 16:51:21,027 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-25 16:51:21,027 INFO ]: Finished accepts. word is rejected. [2018-06-25 16:51:21,027 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-25 16:51:21,027 INFO ]: Interpolant automaton has 3 states. [2018-06-25 16:51:21,027 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-25 16:51:21,027 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-25 16:51:21,027 INFO ]: Found error trace [2018-06-25 16:51:21,027 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 16:51:21,028 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 16:51:21,028 INFO ]: Analyzing trace with hash 1180100628, now seen corresponding path program 1 times [2018-06-25 16:51:21,028 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 16:51:21,028 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 16:51:21,029 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:51:21,029 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 16:51:21,029 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:51:21,204 INFO ]: Conjunction of SSA is unsat [2018-06-25 16:51:21,518 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 16:51:21,518 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 16:51:21,518 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 [2018-06-25 16:51:21,529 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 16:51:21,697 INFO ]: Conjunction of SSA is unsat [2018-06-25 16:51:21,710 INFO ]: Computing forward predicates... [2018-06-25 16:51:22,050 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 16:51:22,085 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 16:51:22,086 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-06-25 16:51:22,086 INFO ]: Interpolant automaton has 6 states [2018-06-25 16:51:22,086 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-25 16:51:22,086 INFO ]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-06-25 16:51:22,087 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 6 states. [2018-06-25 16:51:22,267 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 16:51:22,267 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-25 16:51:22,269 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-25 16:51:22,269 INFO ]: Start accepts. Automaton has 6 states. Word has length 8 [2018-06-25 16:51:22,269 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 16:51:22,269 INFO ]: With dead ends: 11 [2018-06-25 16:51:22,269 INFO ]: Without dead ends: 11 [2018-06-25 16:51:22,271 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 16:51:22,271 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-25 16:51:22,272 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-25 16:51:22,273 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-25 16:51:22,273 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-25 16:51:22,273 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-06-25 16:51:22,273 INFO ]: Finished accepts. word is rejected. [2018-06-25 16:51:22,273 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-25 16:51:22,273 INFO ]: Interpolant automaton has 6 states. [2018-06-25 16:51:22,273 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-25 16:51:22,273 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-25 16:51:22,273 INFO ]: Found error trace [2018-06-25 16:51:22,274 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 16:51:22,274 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 16:51:22,275 INFO ]: Analyzing trace with hash 145098516, now seen corresponding path program 2 times [2018-06-25 16:51:22,275 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 16:51:22,275 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 16:51:22,276 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:51:22,276 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 16:51:22,276 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:51:22,550 INFO ]: Conjunction of SSA is unsat [2018-06-25 16:51:23,250 WARN ]: Spent 354.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 17 [2018-06-25 16:51:24,009 WARN ]: Spent 668.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 16 [2018-06-25 16:51:24,134 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 16:51:24,135 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 16:51:24,135 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 16:51:24,156 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-25 16:51:24,434 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-25 16:51:24,434 INFO ]: Conjunction of SSA is unsat [2018-06-25 16:51:24,443 INFO ]: Computing forward predicates... [2018-06-25 16:51:25,263 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 16:51:25,300 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 16:51:25,300 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2018-06-25 16:51:25,300 INFO ]: Interpolant automaton has 10 states [2018-06-25 16:51:25,300 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-25 16:51:25,300 INFO ]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-06-25 16:51:25,301 INFO ]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-06-25 16:51:25,758 WARN ]: Spent 350.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 22 [2018-06-25 16:51:25,981 WARN ]: Spent 153.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2018-06-25 16:51:26,133 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 16:51:26,133 INFO ]: Finished difference Result 13 states and 13 transitions. [2018-06-25 16:51:26,133 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-25 16:51:26,133 INFO ]: Start accepts. Automaton has 10 states. Word has length 10 [2018-06-25 16:51:26,133 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 16:51:26,134 INFO ]: With dead ends: 13 [2018-06-25 16:51:26,134 INFO ]: Without dead ends: 13 [2018-06-25 16:51:26,134 INFO ]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2018-06-25 16:51:26,134 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-25 16:51:26,136 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-25 16:51:26,136 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-25 16:51:26,136 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-06-25 16:51:26,136 INFO ]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-06-25 16:51:26,136 INFO ]: Finished accepts. word is rejected. [2018-06-25 16:51:26,136 INFO ]: Abstraction has 13 states and 13 transitions. [2018-06-25 16:51:26,136 INFO ]: Interpolant automaton has 10 states. [2018-06-25 16:51:26,136 INFO ]: Start isEmpty. Operand 13 states and 13 transitions. [2018-06-25 16:51:26,139 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-25 16:51:26,139 INFO ]: Found error trace [2018-06-25 16:51:26,139 INFO ]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 16:51:26,139 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 16:51:26,139 INFO ]: Analyzing trace with hash 1940481556, now seen corresponding path program 3 times [2018-06-25 16:51:26,139 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 16:51:26,139 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 16:51:26,141 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:51:26,141 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 16:51:26,141 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:51:26,521 INFO ]: Conjunction of SSA is unsat [2018-06-25 16:51:27,845 WARN ]: Spent 296.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 16 [2018-06-25 16:51:29,143 WARN ]: Spent 1.12 s on a formula simplification. DAG size of input: 134 DAG size of output: 17 [2018-06-25 16:51:31,007 WARN ]: Spent 1.66 s on a formula simplification. DAG size of input: 326 DAG size of output: 16 [2018-06-25 16:51:33,019 WARN ]: Spent 1.92 s on a formula simplification. DAG size of input: 275 DAG size of output: 19 [2018-06-25 16:51:33,066 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 16:51:33,066 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 16:51:33,066 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) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 16:51:33,092 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-25 16:51:33,455 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-25 16:51:33,455 INFO ]: Conjunction of SSA is unsat [2018-06-25 16:51:33,469 INFO ]: Computing forward predicates... [2018-06-25 16:51:34,467 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 16:51:34,506 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 16:51:34,506 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2018-06-25 16:51:34,507 INFO ]: Interpolant automaton has 14 states [2018-06-25 16:51:34,507 INFO ]: Constructing interpolant automaton starting with 14 interpolants. [2018-06-25 16:51:34,507 INFO ]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2018-06-25 16:51:34,507 INFO ]: Start difference. First operand 13 states and 13 transitions. Second operand 14 states. [2018-06-25 16:51:34,763 WARN ]: Spent 155.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2018-06-25 16:51:35,061 WARN ]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2018-06-25 16:51:35,289 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 16:51:35,289 INFO ]: Finished difference Result 15 states and 15 transitions. [2018-06-25 16:51:35,291 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-25 16:51:35,291 INFO ]: Start accepts. Automaton has 14 states. Word has length 12 [2018-06-25 16:51:35,291 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 16:51:35,291 INFO ]: With dead ends: 15 [2018-06-25 16:51:35,291 INFO ]: Without dead ends: 15 [2018-06-25 16:51:35,292 INFO ]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2018-06-25 16:51:35,292 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-25 16:51:35,293 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-25 16:51:35,293 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-25 16:51:35,294 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-06-25 16:51:35,294 INFO ]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-06-25 16:51:35,294 INFO ]: Finished accepts. word is rejected. [2018-06-25 16:51:35,294 INFO ]: Abstraction has 15 states and 15 transitions. [2018-06-25 16:51:35,294 INFO ]: Interpolant automaton has 14 states. [2018-06-25 16:51:35,294 INFO ]: Start isEmpty. Operand 15 states and 15 transitions. [2018-06-25 16:51:35,295 INFO ]: Finished isEmpty. Found accepting run of length 15 [2018-06-25 16:51:35,295 INFO ]: Found error trace [2018-06-25 16:51:35,295 INFO ]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 16:51:35,295 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 16:51:35,295 INFO ]: Analyzing trace with hash 726730004, now seen corresponding path program 4 times [2018-06-25 16:51:35,295 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 16:51:35,295 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 16:51:35,296 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:51:35,296 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 16:51:35,296 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:51:36,879 INFO ]: Conjunction of SSA is unsat Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown