java -Xmx4000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCHC.xml --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/chccomp2018/chcToBoogie_automizer.epf -i /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_3_e4_987_e1_1115.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-55b8104 [2018-06-18 16:13:02,967 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-18 16:13:02,969 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-18 16:13:02,987 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-18 16:13:02,988 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-18 16:13:02,989 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-18 16:13:02,990 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-18 16:13:02,992 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-18 16:13:02,993 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-18 16:13:02,995 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-18 16:13:02,996 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-18 16:13:02,996 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-18 16:13:02,997 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-18 16:13:03,001 INFO L177 SettingsManager]: ChcToBoogie provides no preferences, ignoring... [2018-06-18 16:13:03,001 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-18 16:13:03,002 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-18 16:13:03,003 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-18 16:13:03,018 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-18 16:13:03,019 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-18 16:13:03,020 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-18 16:13:03,021 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-18 16:13:03,023 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-18 16:13:03,023 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-18 16:13:03,024 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-18 16:13:03,024 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-18 16:13:03,029 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-18 16:13:03,029 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-18 16:13:03,030 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-18 16:13:03,035 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-18 16:13:03,035 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-18 16:13:03,036 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-18 16:13:03,037 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-18 16:13:03,037 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-18 16:13:03,041 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-18 16:13:03,042 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-18 16:13:03,042 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chccomp2018/chcToBoogie_automizer.epf [2018-06-18 16:13:03,065 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-18 16:13:03,066 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-18 16:13:03,067 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-18 16:13:03,067 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-18 16:13:03,068 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-18 16:13:03,069 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-18 16:13:03,069 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-18 16:13:03,069 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-18 16:13:03,069 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-18 16:13:03,069 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-18 16:13:03,069 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-18 16:13:03,070 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-18 16:13:03,070 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-18 16:13:03,071 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-18 16:13:03,071 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-18 16:13:03,071 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-18 16:13:03,071 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-18 16:13:03,073 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-18 16:13:03,073 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-18 16:13:03,123 INFO ]: Repository-Root is: /tmp [2018-06-18 16:13:03,138 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-18 16:13:03,143 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-18 16:13:03,145 INFO ]: Initializing SmtParser... [2018-06-18 16:13:03,146 INFO ]: SmtParser initialized [2018-06-18 16:13:03,146 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_3_e4_987_e1_1115.smt2 [2018-06-18 16:13:03,148 INFO ]: Parsing .smt2 file as a set of Horn Clauses No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-06-18 16:13:03,233 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_3_e4_987_e1_1115.smt2 unknown [2018-06-18 16:13:03,626 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_3_e4_987_e1_1115.smt2 [2018-06-18 16:13:03,642 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-18 16:13:03,647 INFO ]: Walking toolchain with 4 elements. [2018-06-18 16:13:03,647 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-18 16:13:03,647 INFO ]: Initializing ChcToBoogie... [2018-06-18 16:13:03,648 INFO ]: ChcToBoogie initialized [2018-06-18 16:13:03,663 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 04:13:03" (1/1) ... [2018-06-18 16:13:03,781 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:13:03 Unit [2018-06-18 16:13:03,782 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-18 16:13:03,782 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-18 16:13:03,782 INFO ]: Initializing Boogie Preprocessor... [2018-06-18 16:13:03,782 INFO ]: Boogie Preprocessor initialized [2018-06-18 16:13:03,805 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:13:03" (1/1) ... [2018-06-18 16:13:03,806 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:13:03" (1/1) ... [2018-06-18 16:13:03,817 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:13:03" (1/1) ... [2018-06-18 16:13:03,817 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:13:03" (1/1) ... [2018-06-18 16:13:03,823 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:13:03" (1/1) ... [2018-06-18 16:13:03,824 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:13:03" (1/1) ... [2018-06-18 16:13:03,826 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:13:03" (1/1) ... [2018-06-18 16:13:03,831 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-18 16:13:03,832 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-18 16:13:03,832 INFO ]: Initializing RCFGBuilder... [2018-06-18 16:13:03,832 INFO ]: RCFGBuilder initialized [2018-06-18 16:13:03,833 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:13:03" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2018-06-18 16:13:03,850 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-18 16:13:03,850 INFO ]: Found specification of procedure False [2018-06-18 16:13:03,850 INFO ]: Found implementation of procedure False [2018-06-18 16:13:03,850 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-18 16:13:03,850 INFO ]: Found specification of procedure state [2018-06-18 16:13:03,850 INFO ]: Found implementation of procedure state [2018-06-18 16:13:03,851 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-18 16:13:03,851 INFO ]: Found specification of procedure Ultimate.START [2018-06-18 16:13:03,851 INFO ]: Found implementation of procedure Ultimate.START Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-18 16:13:04,254 INFO ]: Using library mode [2018-06-18 16:13:04,255 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 04:13:04 BoogieIcfgContainer [2018-06-18 16:13:04,256 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-18 16:13:04,257 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-18 16:13:04,257 INFO ]: Initializing TraceAbstraction... [2018-06-18 16:13:04,263 INFO ]: TraceAbstraction initialized [2018-06-18 16:13:04,263 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 04:13:03" (1/3) ... [2018-06-18 16:13:04,264 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@432d9686 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 18.06 04:13:04, skipping insertion in model container [2018-06-18 16:13:04,264 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:13:03" (2/3) ... [2018-06-18 16:13:04,265 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@432d9686 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.06 04:13:04, skipping insertion in model container [2018-06-18 16:13:04,265 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 04:13:04" (3/3) ... [2018-06-18 16:13:04,267 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-18 16:13:04,277 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-18 16:13:04,287 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-18 16:13:04,338 INFO ]: Using default assertion order modulation [2018-06-18 16:13:04,338 INFO ]: Interprodecural is true [2018-06-18 16:13:04,339 INFO ]: Hoare is false [2018-06-18 16:13:04,339 INFO ]: Compute interpolants for FPandBP [2018-06-18 16:13:04,339 INFO ]: Backedges is TWOTRACK [2018-06-18 16:13:04,339 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-18 16:13:04,339 INFO ]: Difference is false [2018-06-18 16:13:04,339 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-18 16:13:04,339 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-18 16:13:04,357 INFO ]: Start isEmpty. Operand 13 states. [2018-06-18 16:13:04,372 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-18 16:13:04,372 INFO ]: Found error trace [2018-06-18 16:13:04,373 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 16:13:04,373 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 16:13:04,380 INFO ]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times [2018-06-18 16:13:04,382 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 16:13:04,382 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 16:13:04,436 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:13:04,437 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 16:13:04,437 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:13:04,553 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:13:04,563 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 16:13:04,810 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-18 16:13:04,813 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-18 16:13:04,813 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-18 16:13:04,815 INFO ]: Interpolant automaton has 4 states [2018-06-18 16:13:04,833 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-18 16:13:04,833 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-18 16:13:04,836 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-18 16:13:04,987 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 16:13:04,987 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-18 16:13:04,988 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-18 16:13:04,990 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-18 16:13:04,990 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 16:13:05,004 INFO ]: With dead ends: 13 [2018-06-18 16:13:05,004 INFO ]: Without dead ends: 13 [2018-06-18 16:13:05,006 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-18 16:13:05,026 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-18 16:13:05,065 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-18 16:13:05,067 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-18 16:13:05,067 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-18 16:13:05,071 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-18 16:13:05,071 INFO ]: Finished accepts. word is rejected. [2018-06-18 16:13:05,071 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-18 16:13:05,071 INFO ]: Interpolant automaton has 4 states. [2018-06-18 16:13:05,071 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-18 16:13:05,073 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-18 16:13:05,073 INFO ]: Found error trace [2018-06-18 16:13:05,073 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 16:13:05,073 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 16:13:05,073 INFO ]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times [2018-06-18 16:13:05,073 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 16:13:05,073 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 16:13:05,076 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:13:05,076 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 16:13:05,076 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:13:05,170 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:13:05,171 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 16:13:05,513 WARN ]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-06-18 16:13:05,758 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 16:13:05,758 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 16:13:05,758 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-18 16:13:05,769 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 16:13:05,892 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:13:05,901 INFO ]: Computing forward predicates... [2018-06-18 16:13:06,285 WARN ]: Spent 199.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 7 [2018-06-18 16:13:06,509 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 16:13:06,531 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 16:13:06,531 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-06-18 16:13:06,532 INFO ]: Interpolant automaton has 9 states [2018-06-18 16:13:06,532 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-18 16:13:06,532 INFO ]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-06-18 16:13:06,533 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 9 states. [2018-06-18 16:13:06,906 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 16:13:06,906 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-18 16:13:06,907 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-18 16:13:06,908 INFO ]: Start accepts. Automaton has 9 states. Word has length 13 [2018-06-18 16:13:06,908 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 16:13:06,908 INFO ]: With dead ends: 15 [2018-06-18 16:13:06,908 INFO ]: Without dead ends: 15 [2018-06-18 16:13:06,909 INFO ]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2018-06-18 16:13:06,909 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-18 16:13:06,913 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-18 16:13:06,913 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-18 16:13:06,913 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-18 16:13:06,914 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-18 16:13:06,914 INFO ]: Finished accepts. word is rejected. [2018-06-18 16:13:06,914 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-18 16:13:06,914 INFO ]: Interpolant automaton has 9 states. [2018-06-18 16:13:06,914 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-18 16:13:06,914 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-18 16:13:06,914 INFO ]: Found error trace [2018-06-18 16:13:06,914 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 16:13:06,914 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 16:13:06,915 INFO ]: Analyzing trace with hash -1649658231, now seen corresponding path program 2 times [2018-06-18 16:13:06,915 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 16:13:06,915 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 16:13:06,915 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:13:06,916 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 16:13:06,916 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:13:07,061 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:13:07,062 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 16:13:07,437 WARN ]: Spent 109.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2018-06-18 16:13:07,554 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-18 16:13:07,554 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 16:13:07,554 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-18 16:13:07,565 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-18 16:13:07,709 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-18 16:13:07,709 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:13:07,715 INFO ]: Computing forward predicates... [2018-06-18 16:13:08,293 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-18 16:13:08,318 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 16:13:08,318 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2018-06-18 16:13:08,318 INFO ]: Interpolant automaton has 13 states [2018-06-18 16:13:08,318 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-18 16:13:08,319 INFO ]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2018-06-18 16:13:08,319 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 13 states. [2018-06-18 16:13:08,593 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 16:13:08,593 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-18 16:13:08,593 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-18 16:13:08,593 INFO ]: Start accepts. Automaton has 13 states. Word has length 17 [2018-06-18 16:13:08,593 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 16:13:08,594 INFO ]: With dead ends: 17 [2018-06-18 16:13:08,594 INFO ]: Without dead ends: 17 [2018-06-18 16:13:08,595 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2018-06-18 16:13:08,596 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-18 16:13:08,600 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-18 16:13:08,600 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-18 16:13:08,600 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-18 16:13:08,600 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-18 16:13:08,600 INFO ]: Finished accepts. word is rejected. [2018-06-18 16:13:08,600 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-18 16:13:08,600 INFO ]: Interpolant automaton has 13 states. [2018-06-18 16:13:08,600 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-18 16:13:08,601 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-18 16:13:08,601 INFO ]: Found error trace [2018-06-18 16:13:08,601 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 16:13:08,601 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 16:13:08,601 INFO ]: Analyzing trace with hash 2119922091, now seen corresponding path program 3 times [2018-06-18 16:13:08,601 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 16:13:08,601 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 16:13:08,602 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:13:08,602 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 16:13:08,602 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:13:08,733 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:13:08,734 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 16:13:09,258 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-18 16:13:09,259 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 16:13:09,259 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 [2018-06-18 16:13:09,271 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-18 16:13:09,439 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-18 16:13:09,439 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:13:09,447 INFO ]: Computing forward predicates... [2018-06-18 16:13:09,784 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-18 16:13:09,807 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 16:13:09,808 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2018-06-18 16:13:09,808 INFO ]: Interpolant automaton has 17 states [2018-06-18 16:13:09,808 INFO ]: Constructing interpolant automaton starting with 17 interpolants. [2018-06-18 16:13:09,808 INFO ]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2018-06-18 16:13:09,808 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 17 states. [2018-06-18 16:13:10,243 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 16:13:10,243 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-18 16:13:10,286 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-18 16:13:10,286 INFO ]: Start accepts. Automaton has 17 states. Word has length 21 [2018-06-18 16:13:10,286 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 16:13:10,287 INFO ]: With dead ends: 19 [2018-06-18 16:13:10,287 INFO ]: Without dead ends: 19 [2018-06-18 16:13:10,287 INFO ]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2018-06-18 16:13:10,287 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-18 16:13:10,290 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-18 16:13:10,290 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-18 16:13:10,291 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-18 16:13:10,291 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-18 16:13:10,291 INFO ]: Finished accepts. word is rejected. [2018-06-18 16:13:10,291 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-18 16:13:10,291 INFO ]: Interpolant automaton has 17 states. [2018-06-18 16:13:10,291 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-18 16:13:10,292 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-18 16:13:10,292 INFO ]: Found error trace [2018-06-18 16:13:10,292 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 16:13:10,293 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 16:13:10,293 INFO ]: Analyzing trace with hash 1762711629, now seen corresponding path program 4 times [2018-06-18 16:13:10,293 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 16:13:10,293 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 16:13:10,293 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:13:10,293 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 16:13:10,293 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:13:10,496 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:13:10,498 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 16:13:10,919 WARN ]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-06-18 16:13:11,295 WARN ]: Spent 148.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 20 [2018-06-18 16:13:11,465 WARN ]: Spent 150.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 28 [2018-06-18 16:13:11,702 WARN ]: Spent 114.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 26 [2018-06-18 16:13:11,838 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-18 16:13:11,839 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 16:13:11,839 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-18 16:13:11,848 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-18 16:13:12,014 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-18 16:13:12,014 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:13:12,024 INFO ]: Computing forward predicates... [2018-06-18 16:13:12,492 INFO ]: Checked inductivity of 36 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-06-18 16:13:12,514 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 16:13:12,514 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2018-06-18 16:13:12,514 INFO ]: Interpolant automaton has 20 states [2018-06-18 16:13:12,515 INFO ]: Constructing interpolant automaton starting with 20 interpolants. [2018-06-18 16:13:12,515 INFO ]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2018-06-18 16:13:12,515 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 20 states. [2018-06-18 16:13:12,918 WARN ]: Spent 145.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 75 [2018-06-18 16:13:13,301 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 16:13:13,301 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-18 16:13:13,301 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-18 16:13:13,301 INFO ]: Start accepts. Automaton has 20 states. Word has length 25 [2018-06-18 16:13:13,301 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 16:13:13,302 INFO ]: With dead ends: 21 [2018-06-18 16:13:13,302 INFO ]: Without dead ends: 21 [2018-06-18 16:13:13,303 INFO ]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2018-06-18 16:13:13,303 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-18 16:13:13,305 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-18 16:13:13,305 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-18 16:13:13,306 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-18 16:13:13,306 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 25 [2018-06-18 16:13:13,306 INFO ]: Finished accepts. word is rejected. [2018-06-18 16:13:13,306 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-18 16:13:13,306 INFO ]: Interpolant automaton has 20 states. [2018-06-18 16:13:13,306 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-18 16:13:13,307 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-18 16:13:13,307 INFO ]: Found error trace [2018-06-18 16:13:13,307 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 16:13:13,307 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 16:13:13,307 INFO ]: Analyzing trace with hash 853117551, now seen corresponding path program 5 times [2018-06-18 16:13:13,308 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 16:13:13,308 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 16:13:13,308 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:13:13,308 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 16:13:13,308 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:13:13,555 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:13:13,556 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 16:13:14,336 WARN ]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-06-18 16:13:15,100 WARN ]: Spent 674.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 21 [2018-06-18 16:13:15,453 WARN ]: Spent 315.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 23 [2018-06-18 16:13:15,598 WARN ]: Spent 113.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 20 [2018-06-18 16:13:15,981 WARN ]: Spent 336.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 30 [2018-06-18 16:13:16,390 WARN ]: Spent 344.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 28 [2018-06-18 16:13:16,950 WARN ]: Spent 374.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 19 [2018-06-18 16:13:17,631 WARN ]: Spent 540.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 22 [2018-06-18 16:13:17,716 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-18 16:13:17,716 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 16:13:17,716 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-18 16:13:17,723 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-18 16:13:17,975 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-06-18 16:13:17,975 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:13:17,984 INFO ]: Computing forward predicates... [2018-06-18 16:13:18,446 INFO ]: Checked inductivity of 55 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-06-18 16:13:18,474 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 16:13:18,474 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2018-06-18 16:13:18,474 INFO ]: Interpolant automaton has 24 states [2018-06-18 16:13:18,474 INFO ]: Constructing interpolant automaton starting with 24 interpolants. [2018-06-18 16:13:18,475 INFO ]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2018-06-18 16:13:18,475 INFO ]: Start difference. First operand 21 states and 22 transitions. Second operand 24 states. [2018-06-18 16:13:18,667 WARN ]: Spent 117.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2018-06-18 16:13:18,915 WARN ]: Spent 189.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 83 [2018-06-18 16:13:19,234 WARN ]: Spent 145.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 77 [2018-06-18 16:13:19,638 WARN ]: Spent 236.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 74 [2018-06-18 16:13:19,791 WARN ]: Spent 117.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2018-06-18 16:13:20,025 WARN ]: Spent 200.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2018-06-18 16:13:20,074 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 16:13:20,074 INFO ]: Finished difference Result 23 states and 24 transitions. [2018-06-18 16:13:20,075 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-18 16:13:20,075 INFO ]: Start accepts. Automaton has 24 states. Word has length 29 [2018-06-18 16:13:20,075 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 16:13:20,075 INFO ]: With dead ends: 23 [2018-06-18 16:13:20,076 INFO ]: Without dead ends: 23 [2018-06-18 16:13:20,076 INFO ]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=177, Invalid=753, Unknown=0, NotChecked=0, Total=930 [2018-06-18 16:13:20,076 INFO ]: Start minimizeSevpa. Operand 23 states. [2018-06-18 16:13:20,078 INFO ]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-06-18 16:13:20,078 INFO ]: Start removeUnreachable. Operand 23 states. [2018-06-18 16:13:20,078 INFO ]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-06-18 16:13:20,078 INFO ]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 29 [2018-06-18 16:13:20,079 INFO ]: Finished accepts. word is rejected. [2018-06-18 16:13:20,079 INFO ]: Abstraction has 23 states and 24 transitions. [2018-06-18 16:13:20,079 INFO ]: Interpolant automaton has 24 states. [2018-06-18 16:13:20,079 INFO ]: Start isEmpty. Operand 23 states and 24 transitions. [2018-06-18 16:13:20,079 INFO ]: Finished isEmpty. Found accepting run of length 34 [2018-06-18 16:13:20,079 INFO ]: Found error trace [2018-06-18 16:13:20,079 INFO ]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 16:13:20,080 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 16:13:20,080 INFO ]: Analyzing trace with hash -1661294575, now seen corresponding path program 6 times [2018-06-18 16:13:20,080 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 16:13:20,080 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 16:13:20,080 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:13:20,080 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 16:13:20,080 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:13:20,449 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:13:20,451 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 16:13:24,183 WARN ]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-06-18 16:13:30,767 WARN ]: Spent 6.23 s on a formula simplification. DAG size of input: 869 DAG size of output: 25 [2018-06-18 16:13:36,288 WARN ]: Spent 5.18 s on a formula simplification. DAG size of input: 606 DAG size of output: 29 [2018-06-18 16:13:37,626 WARN ]: Spent 1.01 s on a formula simplification. DAG size of input: 421 DAG size of output: 33 [2018-06-18 16:13:40,364 WARN ]: Spent 2.51 s on a formula simplification. DAG size of input: 571 DAG size of output: 45 [2018-06-18 16:13:43,064 WARN ]: Spent 2.40 s on a formula simplification. DAG size of input: 554 DAG size of output: 33 [2018-06-18 16:13:44,695 WARN ]: Spent 1.44 s on a formula simplification. DAG size of input: 543 DAG size of output: 20 [2018-06-18 16:13:49,607 WARN ]: Spent 4.59 s on a formula simplification. DAG size of input: 749 DAG size of output: 19 [2018-06-18 16:13:58,198 WARN ]: Spent 8.03 s on a formula simplification. DAG size of input: 1089 DAG size of output: 28 [2018-06-18 16:14:10,534 WARN ]: Spent 11.64 s on a formula simplification. DAG size of input: 876 DAG size of output: 19 [2018-06-18 16:14:10,554 INFO ]: Checked inductivity of 78 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-06-18 16:14:10,554 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 16:14:10,554 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-18 16:14:10,561 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE Received shutdown request... [2018-06-18 16:14:10,881 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-06-18 16:14:10,881 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:14:10,891 INFO ]: Computing forward predicates... [2018-06-18 16:14:10,897 INFO ]: Timeout while computing interpolants [2018-06-18 16:14:11,097 WARN ]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-18 16:14:11,097 WARN ]: Verification canceled [2018-06-18 16:14:11,103 WARN ]: Timeout [2018-06-18 16:14:11,103 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.06 04:14:11 BoogieIcfgContainer [2018-06-18 16:14:11,103 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-18 16:14:11,104 INFO ]: Toolchain (without parser) took 67461.94 ms. Allocated memory was 304.6 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 247.0 MB in the beginning and 912.4 MB in the end (delta: -665.4 MB). Peak memory consumption was 511.7 MB. Max. memory is 3.6 GB. [2018-06-18 16:14:11,105 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 304.6 MB. Free memory is still 270.1 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-18 16:14:11,105 INFO ]: ChcToBoogie took 134.58 ms. Allocated memory is still 304.6 MB. Free memory was 246.0 MB in the beginning and 243.0 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. [2018-06-18 16:14:11,105 INFO ]: Boogie Preprocessor took 49.05 ms. Allocated memory is still 304.6 MB. Free memory was 243.0 MB in the beginning and 241.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-18 16:14:11,106 INFO ]: RCFGBuilder took 423.54 ms. Allocated memory is still 304.6 MB. Free memory was 241.0 MB in the beginning and 218.0 MB in the end (delta: 23.0 MB). Peak memory consumption was 23.0 MB. Max. memory is 3.6 GB. [2018-06-18 16:14:11,108 INFO ]: TraceAbstraction took 66846.04 ms. Allocated memory was 304.6 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 217.0 MB in the beginning and 912.4 MB in the end (delta: -695.3 MB). Peak memory consumption was 481.7 MB. Max. memory is 3.6 GB. [2018-06-18 16:14:11,110 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.07 ms. Allocated memory is still 304.6 MB. Free memory is still 270.1 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 134.58 ms. Allocated memory is still 304.6 MB. Free memory was 246.0 MB in the beginning and 243.0 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 49.05 ms. Allocated memory is still 304.6 MB. Free memory was 243.0 MB in the beginning and 241.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 423.54 ms. Allocated memory is still 304.6 MB. Free memory was 241.0 MB in the beginning and 218.0 MB in the end (delta: 23.0 MB). Peak memory consumption was 23.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 66846.04 ms. Allocated memory was 304.6 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 217.0 MB in the beginning and 912.4 MB in the end (delta: -695.3 MB). Peak memory consumption was 481.7 MB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [UNKNOWN] : Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 0). Cancelled while BasicCegarLoop was analyzing trace of length 34 with TraceHistMax 7, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 1 quantified variables from 1 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 66.7s OverallTime, 7 OverallIterations, 7 TraceHistogramMax, 3.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 65 SDtfs, 123 SDslu, 427 SDs, 0 SdLazy, 331 SolverSat, 162 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 178 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 10.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 1.5s SatisfiabilityAnalysisTime, 9.8s InterpolantComputationTime, 219 NumberOfCodeBlocks, 219 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 208 ConstructedInterpolants, 0 QuantifiedInterpolants, 36220 SizeOfPredicates, 143 NumberOfNonLiveVariables, 4435 ConjunctsInSsa, 188 ConjunctsInUnsatCore, 11 InterpolantComputations, 1 PerfectInterpolantSequences, 72/250 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/metros_3_e4_987_e1_1115.smt2_chcToBoogie_automizer.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-18_16-14-11-128.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/metros_3_e4_987_e1_1115.smt2_chcToBoogie_automizer.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-18_16-14-11-128.csv Completed graceful shutdown