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_e2_704_e7_810.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-14921ce [2018-06-25 16:38:10,174 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-25 16:38:10,176 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-25 16:38:10,190 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-25 16:38:10,190 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-25 16:38:10,191 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-25 16:38:10,192 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-25 16:38:10,195 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-25 16:38:10,196 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-25 16:38:10,198 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-25 16:38:10,199 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-25 16:38:10,199 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-25 16:38:10,200 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-25 16:38:10,203 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-25 16:38:10,203 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-25 16:38:10,204 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-25 16:38:10,206 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-25 16:38:10,215 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-25 16:38:10,216 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-25 16:38:10,217 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-25 16:38:10,218 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-25 16:38:10,222 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-25 16:38:10,222 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-25 16:38:10,223 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-25 16:38:10,223 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-25 16:38:10,224 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-25 16:38:10,227 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-25 16:38:10,227 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-25 16:38:10,228 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-25 16:38:10,228 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-25 16:38:10,229 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-25 16:38:10,230 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-25 16:38:10,233 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-25 16:38:10,234 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-25 16:38:10,235 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-25 16:38:10,235 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-25 16:38:10,258 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-25 16:38:10,259 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-25 16:38:10,259 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-25 16:38:10,259 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-25 16:38:10,260 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-25 16:38:10,261 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-25 16:38:10,261 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-25 16:38:10,261 INFO L133 SettingsManager]: * Use SBE=true [2018-06-25 16:38:10,261 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-25 16:38:10,261 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-25 16:38:10,262 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-25 16:38:10,263 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-25 16:38:10,263 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-25 16:38:10,263 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-25 16:38:10,263 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-25 16:38:10,263 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-25 16:38:10,264 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-25 16:38:10,264 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-25 16:38:10,265 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-25 16:38:10,265 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-25 16:38:10,265 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-25 16:38:10,266 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-25 16:38:10,267 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-25 16:38:10,317 INFO ]: Repository-Root is: /tmp [2018-06-25 16:38:10,332 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-25 16:38:10,338 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-25 16:38:10,339 INFO ]: Initializing SmtParser... [2018-06-25 16:38:10,339 INFO ]: SmtParser initialized [2018-06-25 16:38:10,340 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_2_e2_704_e7_810.smt2 [2018-06-25 16:38:10,341 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 16:38:10,440 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_2_e2_704_e7_810.smt2 unknown [2018-06-25 16:38:10,849 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_2_e2_704_e7_810.smt2 [2018-06-25 16:38:10,853 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-25 16:38:10,859 INFO ]: Walking toolchain with 4 elements. [2018-06-25 16:38:10,860 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-25 16:38:10,860 INFO ]: Initializing ChcToBoogie... [2018-06-25 16:38:10,860 INFO ]: ChcToBoogie initialized [2018-06-25 16:38:10,863 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 04:38:10" (1/1) ... [2018-06-25 16:38:10,940 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:38:10 Unit [2018-06-25 16:38:10,940 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-25 16:38:10,941 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-25 16:38:10,941 INFO ]: Initializing Boogie Preprocessor... [2018-06-25 16:38:10,941 INFO ]: Boogie Preprocessor initialized [2018-06-25 16:38:10,961 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:38:10" (1/1) ... [2018-06-25 16:38:10,961 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:38:10" (1/1) ... [2018-06-25 16:38:10,970 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:38:10" (1/1) ... [2018-06-25 16:38:10,970 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:38:10" (1/1) ... [2018-06-25 16:38:10,976 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:38:10" (1/1) ... [2018-06-25 16:38:10,977 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:38:10" (1/1) ... [2018-06-25 16:38:10,979 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:38:10" (1/1) ... [2018-06-25 16:38:10,982 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-25 16:38:10,983 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-25 16:38:10,983 INFO ]: Initializing RCFGBuilder... [2018-06-25 16:38:10,983 INFO ]: RCFGBuilder initialized [2018-06-25 16:38:10,984 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:38:10" (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 16:38:11,033 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-25 16:38:11,033 INFO ]: Found specification of procedure gotoProc [2018-06-25 16:38:11,033 INFO ]: Found implementation of procedure gotoProc [2018-06-25 16:38:11,033 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-25 16:38:11,033 INFO ]: Found specification of procedure Ultimate.START [2018-06-25 16:38:11,033 INFO ]: Found implementation of procedure Ultimate.START [2018-06-25 16:38:11,487 INFO ]: Using library mode [2018-06-25 16:38:11,488 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 04:38:11 BoogieIcfgContainer [2018-06-25 16:38:11,488 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-25 16:38:11,489 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-25 16:38:11,489 INFO ]: Initializing TraceAbstraction... [2018-06-25 16:38:11,494 INFO ]: TraceAbstraction initialized [2018-06-25 16:38:11,495 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 04:38:10" (1/3) ... [2018-06-25 16:38:11,495 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@687aecb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 25.06 04:38:11, skipping insertion in model container [2018-06-25 16:38:11,495 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:38:10" (2/3) ... [2018-06-25 16:38:11,496 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@687aecb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.06 04:38:11, skipping insertion in model container [2018-06-25 16:38:11,496 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 04:38:11" (3/3) ... [2018-06-25 16:38:11,498 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-25 16:38:11,507 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-25 16:38:11,517 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-25 16:38:11,564 INFO ]: Using default assertion order modulation [2018-06-25 16:38:11,565 INFO ]: Interprodecural is true [2018-06-25 16:38:11,565 INFO ]: Hoare is false [2018-06-25 16:38:11,565 INFO ]: Compute interpolants for FPandBP [2018-06-25 16:38:11,565 INFO ]: Backedges is TWOTRACK [2018-06-25 16:38:11,565 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-25 16:38:11,565 INFO ]: Difference is false [2018-06-25 16:38:11,565 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-25 16:38:11,565 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-25 16:38:11,577 INFO ]: Start isEmpty. Operand 10 states. [2018-06-25 16:38:11,593 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-25 16:38:11,593 INFO ]: Found error trace [2018-06-25 16:38:11,596 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-25 16:38:11,596 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 16:38:11,601 INFO ]: Analyzing trace with hash 1284994894, now seen corresponding path program 1 times [2018-06-25 16:38:11,603 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 16:38:11,603 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 16:38:11,645 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:38:11,645 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 16:38:11,645 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:38:11,742 INFO ]: Conjunction of SSA is unsat [2018-06-25 16:38:11,904 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 16:38:11,906 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-25 16:38:11,906 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-25 16:38:11,907 INFO ]: Interpolant automaton has 3 states [2018-06-25 16:38:11,920 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-25 16:38:11,920 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 16:38:11,922 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-25 16:38:11,997 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 16:38:11,997 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-25 16:38:12,000 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-25 16:38:12,001 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-25 16:38:12,001 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 16:38:12,010 INFO ]: With dead ends: 9 [2018-06-25 16:38:12,010 INFO ]: Without dead ends: 9 [2018-06-25 16:38:12,012 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 16:38:12,025 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-25 16:38:12,049 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-25 16:38:12,050 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-25 16:38:12,051 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-25 16:38:12,054 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-25 16:38:12,054 INFO ]: Finished accepts. word is rejected. [2018-06-25 16:38:12,054 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-25 16:38:12,054 INFO ]: Interpolant automaton has 3 states. [2018-06-25 16:38:12,054 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-25 16:38:12,054 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-25 16:38:12,054 INFO ]: Found error trace [2018-06-25 16:38:12,054 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 16:38:12,055 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 16:38:12,056 INFO ]: Analyzing trace with hash 1180964567, now seen corresponding path program 1 times [2018-06-25 16:38:12,056 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 16:38:12,056 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 16:38:12,057 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:38:12,057 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 16:38:12,057 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:38:12,187 INFO ]: Conjunction of SSA is unsat [2018-06-25 16:38:12,382 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 16:38:12,382 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 16:38:12,382 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 16:38:12,397 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 16:38:12,567 INFO ]: Conjunction of SSA is unsat [2018-06-25 16:38:12,578 INFO ]: Computing forward predicates... [2018-06-25 16:38:12,896 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 16:38:12,930 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 16:38:12,930 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-06-25 16:38:12,931 INFO ]: Interpolant automaton has 6 states [2018-06-25 16:38:12,931 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-25 16:38:12,931 INFO ]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-06-25 16:38:12,931 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 6 states. [2018-06-25 16:38:13,072 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 16:38:13,072 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-25 16:38:13,073 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-25 16:38:13,073 INFO ]: Start accepts. Automaton has 6 states. Word has length 8 [2018-06-25 16:38:13,073 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 16:38:13,073 INFO ]: With dead ends: 11 [2018-06-25 16:38:13,073 INFO ]: Without dead ends: 11 [2018-06-25 16:38:13,074 INFO ]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-06-25 16:38:13,074 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-25 16:38:13,075 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-25 16:38:13,075 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-25 16:38:13,076 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-25 16:38:13,076 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-06-25 16:38:13,076 INFO ]: Finished accepts. word is rejected. [2018-06-25 16:38:13,076 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-25 16:38:13,076 INFO ]: Interpolant automaton has 6 states. [2018-06-25 16:38:13,076 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-25 16:38:13,076 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-25 16:38:13,076 INFO ]: Found error trace [2018-06-25 16:38:13,076 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 16:38:13,076 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 16:38:13,077 INFO ]: Analyzing trace with hash 1062095287, now seen corresponding path program 2 times [2018-06-25 16:38:13,077 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 16:38:13,077 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 16:38:13,080 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:38:13,080 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 16:38:13,080 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:38:13,265 INFO ]: Conjunction of SSA is unsat [2018-06-25 16:38:13,749 WARN ]: Spent 211.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 16 [2018-06-25 16:38:14,499 WARN ]: Spent 716.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 15 [2018-06-25 16:38:14,505 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 16:38:14,505 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 16:38:14,505 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 16:38:14,514 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-25 16:38:14,722 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-25 16:38:14,722 INFO ]: Conjunction of SSA is unsat [2018-06-25 16:38:14,728 INFO ]: Computing forward predicates... [2018-06-25 16:38:15,195 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 16:38:15,218 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 16:38:15,218 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2018-06-25 16:38:15,218 INFO ]: Interpolant automaton has 10 states [2018-06-25 16:38:15,219 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-25 16:38:15,219 INFO ]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-06-25 16:38:15,219 INFO ]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-06-25 16:38:15,319 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 16:38:15,319 INFO ]: Finished difference Result 13 states and 13 transitions. [2018-06-25 16:38:15,320 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-25 16:38:15,320 INFO ]: Start accepts. Automaton has 10 states. Word has length 10 [2018-06-25 16:38:15,320 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 16:38:15,320 INFO ]: With dead ends: 13 [2018-06-25 16:38:15,320 INFO ]: Without dead ends: 13 [2018-06-25 16:38:15,321 INFO ]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2018-06-25 16:38:15,321 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-25 16:38:15,322 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-25 16:38:15,322 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-25 16:38:15,323 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-06-25 16:38:15,323 INFO ]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-06-25 16:38:15,323 INFO ]: Finished accepts. word is rejected. [2018-06-25 16:38:15,323 INFO ]: Abstraction has 13 states and 13 transitions. [2018-06-25 16:38:15,323 INFO ]: Interpolant automaton has 10 states. [2018-06-25 16:38:15,323 INFO ]: Start isEmpty. Operand 13 states and 13 transitions. [2018-06-25 16:38:15,323 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-25 16:38:15,323 INFO ]: Found error trace [2018-06-25 16:38:15,323 INFO ]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 16:38:15,323 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 16:38:15,324 INFO ]: Analyzing trace with hash -1502133097, now seen corresponding path program 3 times [2018-06-25 16:38:15,324 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 16:38:15,324 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 16:38:15,324 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:38:15,325 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 16:38:15,325 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:38:15,786 INFO ]: Conjunction of SSA is unsat [2018-06-25 16:38:18,341 WARN ]: Spent 1000.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 16 [2018-06-25 16:38:19,636 WARN ]: Spent 1.14 s on a formula simplification. DAG size of input: 429 DAG size of output: 16 [2018-06-25 16:38:21,649 WARN ]: Spent 1.78 s on a formula simplification. DAG size of input: 734 DAG size of output: 15 [2018-06-25 16:38:26,553 WARN ]: Spent 4.66 s on a formula simplification. DAG size of input: 518 DAG size of output: 15 [2018-06-25 16:38:26,573 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 16:38:26,573 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 16:38:26,573 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 16:38:26,583 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-25 16:38:26,782 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-25 16:38:26,782 INFO ]: Conjunction of SSA is unsat [2018-06-25 16:38:26,791 INFO ]: Computing forward predicates... [2018-06-25 16:38:27,086 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 16:38:27,109 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 16:38:27,109 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2018-06-25 16:38:27,109 INFO ]: Interpolant automaton has 14 states [2018-06-25 16:38:27,110 INFO ]: Constructing interpolant automaton starting with 14 interpolants. [2018-06-25 16:38:27,110 INFO ]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2018-06-25 16:38:27,110 INFO ]: Start difference. First operand 13 states and 13 transitions. Second operand 14 states. [2018-06-25 16:38:27,303 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 16:38:27,303 INFO ]: Finished difference Result 15 states and 15 transitions. [2018-06-25 16:38:27,303 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-25 16:38:27,303 INFO ]: Start accepts. Automaton has 14 states. Word has length 12 [2018-06-25 16:38:27,303 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 16:38:27,304 INFO ]: With dead ends: 15 [2018-06-25 16:38:27,304 INFO ]: Without dead ends: 15 [2018-06-25 16:38:27,307 INFO ]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2018-06-25 16:38:27,307 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-25 16:38:27,308 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-25 16:38:27,308 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-25 16:38:27,309 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-06-25 16:38:27,309 INFO ]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-06-25 16:38:27,309 INFO ]: Finished accepts. word is rejected. [2018-06-25 16:38:27,309 INFO ]: Abstraction has 15 states and 15 transitions. [2018-06-25 16:38:27,309 INFO ]: Interpolant automaton has 14 states. [2018-06-25 16:38:27,309 INFO ]: Start isEmpty. Operand 15 states and 15 transitions. [2018-06-25 16:38:27,309 INFO ]: Finished isEmpty. Found accepting run of length 15 [2018-06-25 16:38:27,309 INFO ]: Found error trace [2018-06-25 16:38:27,310 INFO ]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 16:38:27,310 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 16:38:27,310 INFO ]: Analyzing trace with hash -414382217, now seen corresponding path program 4 times [2018-06-25 16:38:27,310 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 16:38:27,310 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 16:38:27,311 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:38:27,311 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 16:38:27,311 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:38:29,167 INFO ]: Conjunction of SSA is unsat Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown