java -Xss1g -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_No_Goto.epf -i /storage/chc-comp/vmt-chc-benchmarks/cav12/token_ring.13.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 14:29:36,815 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 14:29:36,818 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 14:29:36,829 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 14:29:36,829 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 14:29:36,830 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 14:29:36,832 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 14:29:36,835 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 14:29:36,836 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 14:29:36,839 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 14:29:36,840 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 14:29:36,840 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 14:29:36,841 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 14:29:36,842 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 14:29:36,842 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 14:29:36,843 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 14:29:36,854 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 14:29:36,856 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 14:29:36,857 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 14:29:36,858 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 14:29:36,859 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 14:29:36,866 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 14:29:36,866 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 14:29:36,866 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 14:29:36,867 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 14:29:36,868 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 14:29:36,869 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 14:29:36,869 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 14:29:36,870 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 14:29:36,871 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 14:29:36,871 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 14:29:36,872 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 14:29:36,872 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 14:29:36,873 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 14:29:36,873 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 14:29:36,874 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_No_Goto.epf [2018-06-22 14:29:36,886 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 14:29:36,887 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 14:29:36,887 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 14:29:36,887 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 14:29:36,888 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 14:29:36,888 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 14:29:36,889 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 14:29:36,889 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 14:29:36,889 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 14:29:36,889 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 14:29:36,889 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 14:29:36,889 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 14:29:36,890 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 14:29:36,890 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 14:29:36,890 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 14:29:36,890 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 14:29:36,890 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 14:29:36,891 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 14:29:36,891 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 14:29:36,892 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 14:29:36,892 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 14:29:36,932 INFO ]: Repository-Root is: /tmp [2018-06-22 14:29:36,950 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 14:29:36,955 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 14:29:36,957 INFO ]: Initializing SmtParser... [2018-06-22 14:29:36,957 INFO ]: SmtParser initialized [2018-06-22 14:29:36,958 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/cav12/token_ring.13.smt2 [2018-06-22 14:29:36,960 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 [2018-06-22 14:29:37,059 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/token_ring.13.smt2 unknown [2018-06-22 14:29:45,499 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/token_ring.13.smt2 [2018-06-22 14:29:45,503 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 14:29:45,509 INFO ]: Walking toolchain with 4 elements. [2018-06-22 14:29:45,509 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 14:29:45,509 INFO ]: Initializing ChcToBoogie... [2018-06-22 14:29:45,510 INFO ]: ChcToBoogie initialized [2018-06-22 14:29:45,513 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:29:45" (1/1) ... [2018-06-22 14:29:45,646 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:29:45 Unit [2018-06-22 14:29:45,646 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 14:29:45,647 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 14:29:45,647 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 14:29:45,647 INFO ]: Boogie Preprocessor initialized [2018-06-22 14:29:45,667 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:29:45" (1/1) ... [2018-06-22 14:29:45,668 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:29:45" (1/1) ... [2018-06-22 14:29:45,743 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:29:45" (1/1) ... [2018-06-22 14:29:45,743 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:29:45" (1/1) ... [2018-06-22 14:29:45,806 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:29:45" (1/1) ... [2018-06-22 14:29:45,807 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:29:45" (1/1) ... [2018-06-22 14:29:45,854 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:29:45" (1/1) ... [2018-06-22 14:29:45,898 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 14:29:45,899 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 14:29:45,899 INFO ]: Initializing RCFGBuilder... [2018-06-22 14:29:45,899 INFO ]: RCFGBuilder initialized [2018-06-22 14:29:45,903 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:29:45" (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) [2018-06-22 14:29:45,916 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 14:29:45,916 INFO ]: Found specification of procedure False [2018-06-22 14:29:45,916 INFO ]: Found implementation of procedure False [2018-06-22 14:29:45,916 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 14:29:45,916 INFO ]: Found specification of procedure state [2018-06-22 14:29:45,916 INFO ]: Found implementation of procedure state [2018-06-22 14:29:45,916 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 14:29:45,916 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 14:29:45,916 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 [2018-06-22 14:29:53,702 INFO ]: Using library mode [2018-06-22 14:29:53,702 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:29:53 BoogieIcfgContainer [2018-06-22 14:29:53,702 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 14:29:53,704 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 14:29:53,704 INFO ]: Initializing TraceAbstraction... [2018-06-22 14:29:53,708 INFO ]: TraceAbstraction initialized [2018-06-22 14:29:53,708 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:29:45" (1/3) ... [2018-06-22 14:29:53,709 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40b22141 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 02:29:53, skipping insertion in model container [2018-06-22 14:29:53,709 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:29:45" (2/3) ... [2018-06-22 14:29:53,709 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40b22141 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 02:29:53, skipping insertion in model container [2018-06-22 14:29:53,709 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:29:53" (3/3) ... [2018-06-22 14:29:53,712 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 14:29:53,719 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 14:29:53,725 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 14:29:53,772 INFO ]: Using default assertion order modulation [2018-06-22 14:29:53,773 INFO ]: Interprodecural is true [2018-06-22 14:29:53,773 INFO ]: Hoare is false [2018-06-22 14:29:53,773 INFO ]: Compute interpolants for FPandBP [2018-06-22 14:29:53,773 INFO ]: Backedges is TWOTRACK [2018-06-22 14:29:53,773 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 14:29:53,773 INFO ]: Difference is false [2018-06-22 14:29:53,773 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 14:29:53,773 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 14:29:53,789 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 14:29:53,799 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 14:29:53,799 INFO ]: Found error trace [2018-06-22 14:29:53,800 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:29:53,800 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:29:53,804 INFO ]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times [2018-06-22 14:29:53,805 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:29:53,805 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:29:53,837 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:29:53,837 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:29:53,837 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:29:54,071 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:29:54,342 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 14:29:54,344 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 14:29:54,344 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 14:29:54,346 INFO ]: Interpolant automaton has 4 states [2018-06-22 14:29:54,361 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 14:29:54,362 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 14:29:54,364 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 14:29:54,918 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:29:54,918 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 14:29:54,920 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 14:29:54,921 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 14:29:54,921 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:29:54,931 INFO ]: With dead ends: 13 [2018-06-22 14:29:54,932 INFO ]: Without dead ends: 13 [2018-06-22 14:29:54,933 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 [2018-06-22 14:29:54,951 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 14:29:54,972 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 14:29:54,974 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 14:29:54,974 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 14:29:54,975 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 14:29:54,975 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:29:54,975 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 14:29:54,975 INFO ]: Interpolant automaton has 4 states. [2018-06-22 14:29:54,976 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 14:29:54,977 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 14:29:54,977 INFO ]: Found error trace [2018-06-22 14:29:54,977 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:29:54,977 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:29:54,977 INFO ]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times [2018-06-22 14:29:54,977 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:29:54,977 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:29:54,978 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:29:54,978 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:29:54,978 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:29:55,983 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:29:57,827 WARN ]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-06-22 14:29:58,057 WARN ]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-06-22 14:29:58,408 WARN ]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-06-22 14:29:58,410 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:29:58,410 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:29:58,411 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 [2018-06-22 14:29:58,426 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:29:59,516 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:29:59,675 INFO ]: Computing forward predicates... [2018-06-22 14:29:59,913 WARN ]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2018-06-22 14:30:08,042 WARN ]: Spent 784.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 39 [2018-06-22 14:30:08,403 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:30:08,439 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:30:08,439 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2018-06-22 14:30:08,440 INFO ]: Interpolant automaton has 10 states [2018-06-22 14:30:08,440 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-22 14:30:08,440 INFO ]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-06-22 14:30:08,440 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 10 states. [2018-06-22 14:30:09,230 WARN ]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2018-06-22 14:30:09,571 WARN ]: Spent 218.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 33 [2018-06-22 14:30:09,753 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:30:09,753 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 14:30:09,755 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 14:30:09,755 INFO ]: Start accepts. Automaton has 10 states. Word has length 13 [2018-06-22 14:30:09,755 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:30:09,755 INFO ]: With dead ends: 15 [2018-06-22 14:30:09,755 INFO ]: Without dead ends: 15 [2018-06-22 14:30:09,756 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2018-06-22 14:30:09,756 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 14:30:09,759 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 14:30:09,759 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 14:30:09,760 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 14:30:09,760 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 14:30:09,760 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:30:09,760 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 14:30:09,760 INFO ]: Interpolant automaton has 10 states. [2018-06-22 14:30:09,760 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 14:30:09,760 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 14:30:09,760 INFO ]: Found error trace [2018-06-22 14:30:09,761 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:30:09,761 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:30:09,761 INFO ]: Analyzing trace with hash -1649658231, now seen corresponding path program 2 times [2018-06-22 14:30:09,761 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:30:09,761 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:30:09,762 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:30:09,762 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:30:09,762 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:30:11,446 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:30:13,526 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 14:30:13,526 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:30:13,527 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 [2018-06-22 14:30:13,535 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 14:30:14,663 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 14:30:14,663 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:30:14,775 INFO ]: Computing forward predicates... [2018-06-22 14:30:19,670 WARN ]: Spent 303.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 27 [2018-06-22 14:30:23,970 WARN ]: Spent 367.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 36 [2018-06-22 14:30:24,259 WARN ]: Spent 141.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2018-06-22 14:30:24,265 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 14:30:24,309 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:30:24,309 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2018-06-22 14:30:24,310 INFO ]: Interpolant automaton has 13 states [2018-06-22 14:30:24,310 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-22 14:30:24,310 INFO ]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2018-06-22 14:30:24,310 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 13 states. [2018-06-22 14:30:24,767 WARN ]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2018-06-22 14:30:25,155 WARN ]: Spent 208.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 40 [2018-06-22 14:30:25,574 WARN ]: Spent 338.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2018-06-22 14:30:25,709 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:30:25,709 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 14:30:25,711 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 14:30:25,711 INFO ]: Start accepts. Automaton has 13 states. Word has length 17 [2018-06-22 14:30:25,711 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:30:25,711 INFO ]: With dead ends: 17 [2018-06-22 14:30:25,711 INFO ]: Without dead ends: 17 [2018-06-22 14:30:25,712 INFO ]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2018-06-22 14:30:25,712 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 14:30:25,714 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 14:30:25,714 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 14:30:25,715 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 14:30:25,715 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 14:30:25,715 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:30:25,715 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 14:30:25,715 INFO ]: Interpolant automaton has 13 states. [2018-06-22 14:30:25,715 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 14:30:25,715 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 14:30:25,715 INFO ]: Found error trace [2018-06-22 14:30:25,716 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:30:25,716 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:30:25,716 INFO ]: Analyzing trace with hash 2119922091, now seen corresponding path program 3 times [2018-06-22 14:30:25,716 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:30:25,716 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:30:25,716 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:30:25,717 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:30:25,717 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:30:27,139 INFO ]: Conjunction of SSA is unsat Received shutdown request... [2018-06-22 14:30:29,250 WARN ]: Unable to check validity of interpolant: cancelled [2018-06-22 14:30:29,258 WARN ]: Unable to check validity of interpolant: cancelled [2018-06-22 14:30:29,258 WARN ]: Unable to check validity of interpolant: cancelled [2018-06-22 14:30:29,258 WARN ]: Unable to check validity of interpolant: cancelled [2018-06-22 14:30:29,265 WARN ]: Unable to check validity of interpolant: cancelled [2018-06-22 14:30:29,265 WARN ]: Unable to check validity of interpolant: cancelled [2018-06-22 14:30:29,267 WARN ]: Unable to check validity of interpolant: cancelled [2018-06-22 14:30:29,267 WARN ]: Unable to check validity of interpolant: cancelled [2018-06-22 14:30:29,270 WARN ]: Unable to check validity of interpolant: cancelled [2018-06-22 14:30:29,270 WARN ]: Unable to check validity of interpolant: cancelled [2018-06-22 14:30:29,272 WARN ]: Unable to check validity of interpolant: cancelled [2018-06-22 14:30:29,272 WARN ]: Unable to check validity of interpolant: cancelled [2018-06-22 14:30:29,272 WARN ]: Unable to check validity of interpolant: cancelled [2018-06-22 14:30:29,272 WARN ]: Unable to check validity of interpolant: cancelled [2018-06-22 14:30:29,316 WARN ]: Verification canceled [2018-06-22 14:30:29,321 WARN ]: Timeout [2018-06-22 14:30:29,321 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 02:30:29 BoogieIcfgContainer [2018-06-22 14:30:29,321 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 14:30:29,322 INFO ]: Toolchain (without parser) took 43818.28 ms. Allocated memory was 1.2 GB in the beginning and 1.6 GB in the end (delta: 336.6 MB). Free memory was 817.6 MB in the beginning and 311.6 MB in the end (delta: 506.0 MB). Peak memory consumption was 842.6 MB. Max. memory is 3.6 GB. [2018-06-22 14:30:29,322 INFO ]: SmtParser took 0.55 ms. Allocated memory is still 306.7 MB. Free memory is still 272.2 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 14:30:29,323 INFO ]: ChcToBoogie took 137.02 ms. Allocated memory is still 1.2 GB. Free memory was 817.6 MB in the beginning and 797.8 MB in the end (delta: 19.8 MB). Peak memory consumption was 19.8 MB. Max. memory is 3.6 GB. [2018-06-22 14:30:29,323 INFO ]: Boogie Preprocessor took 251.23 ms. Allocated memory is still 1.2 GB. Free memory was 797.8 MB in the beginning and 777.8 MB in the end (delta: 20.0 MB). Peak memory consumption was 20.0 MB. Max. memory is 3.6 GB. [2018-06-22 14:30:29,323 INFO ]: RCFGBuilder took 7803.96 ms. Allocated memory was 1.2 GB in the beginning and 1.6 GB in the end (delta: 353.9 MB). Free memory was 777.8 MB in the beginning and 896.6 MB in the end (delta: -118.8 MB). Peak memory consumption was 974.2 MB. Max. memory is 3.6 GB. [2018-06-22 14:30:29,323 INFO ]: TraceAbstraction took 35617.51 ms. Allocated memory was 1.6 GB in the beginning and 1.6 GB in the end (delta: -17.3 MB). Free memory was 896.6 MB in the beginning and 311.6 MB in the end (delta: 585.0 MB). Peak memory consumption was 567.7 MB. Max. memory is 3.6 GB. [2018-06-22 14:30:29,325 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.55 ms. Allocated memory is still 306.7 MB. Free memory is still 272.2 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 137.02 ms. Allocated memory is still 1.2 GB. Free memory was 817.6 MB in the beginning and 797.8 MB in the end (delta: 19.8 MB). Peak memory consumption was 19.8 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 251.23 ms. Allocated memory is still 1.2 GB. Free memory was 797.8 MB in the beginning and 777.8 MB in the end (delta: 20.0 MB). Peak memory consumption was 20.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 7803.96 ms. Allocated memory was 1.2 GB in the beginning and 1.6 GB in the end (delta: 353.9 MB). Free memory was 777.8 MB in the beginning and 896.6 MB in the end (delta: -118.8 MB). Peak memory consumption was 974.2 MB. Max. memory is 3.6 GB. * TraceAbstraction took 35617.51 ms. Allocated memory was 1.6 GB in the beginning and 1.6 GB in the end (delta: -17.3 MB). Free memory was 896.6 MB in the beginning and 311.6 MB in the end (delta: 585.0 MB). Peak memory consumption was 567.7 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 22 with TraceHistMax 4, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while NestedInterpolantsBuilder was constructing predicates for 20 interpolants. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 35.5s OverallTime, 4 OverallIterations, 4 TraceHistogramMax, 3.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 33 SDtfs, 22 SDslu, 95 SDs, 0 SdLazy, 66 SolverSat, 28 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 4.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=3, 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, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.9s SsaConstructionTime, 4.1s SatisfiabilityAnalysisTime, 23.2s InterpolantComputationTime, 69 NumberOfCodeBlocks, 69 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 64 ConstructedInterpolants, 0 QuantifiedInterpolants, 12228 SizeOfPredicates, 5045 NumberOfNonLiveVariables, 7943 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 8/26 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/token_ring.13.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_14-30-29-335.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/token_ring.13.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_14-30-29-335.csv Completed graceful shutdown