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.7.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 14:34:08,629 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 14:34:08,632 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 14:34:08,644 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 14:34:08,644 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 14:34:08,645 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 14:34:08,646 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 14:34:08,649 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 14:34:08,650 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 14:34:08,652 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 14:34:08,653 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 14:34:08,653 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 14:34:08,654 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 14:34:08,659 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 14:34:08,660 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 14:34:08,661 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 14:34:08,672 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 14:34:08,674 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 14:34:08,676 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 14:34:08,677 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 14:34:08,678 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 14:34:08,680 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 14:34:08,680 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 14:34:08,680 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 14:34:08,681 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 14:34:08,682 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 14:34:08,682 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 14:34:08,683 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 14:34:08,684 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 14:34:08,684 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 14:34:08,685 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 14:34:08,685 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 14:34:08,686 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 14:34:08,686 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 14:34:08,687 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 14:34:08,687 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 14:34:08,711 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 14:34:08,711 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 14:34:08,712 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 14:34:08,712 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 14:34:08,713 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 14:34:08,713 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 14:34:08,713 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 14:34:08,713 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 14:34:08,714 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 14:34:08,714 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 14:34:08,714 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 14:34:08,714 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 14:34:08,714 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 14:34:08,714 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 14:34:08,715 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 14:34:08,715 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 14:34:08,715 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 14:34:08,715 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 14:34:08,715 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 14:34:08,717 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 14:34:08,717 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 14:34:08,762 INFO ]: Repository-Root is: /tmp [2018-06-22 14:34:08,775 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 14:34:08,781 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 14:34:08,782 INFO ]: Initializing SmtParser... [2018-06-22 14:34:08,782 INFO ]: SmtParser initialized [2018-06-22 14:34:08,783 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/cav12/token_ring.7.smt2 [2018-06-22 14:34:08,785 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 14:34:08,873 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/token_ring.7.smt2 unknown [2018-06-22 14:34:11,444 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/token_ring.7.smt2 [2018-06-22 14:34:11,449 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 14:34:11,454 INFO ]: Walking toolchain with 4 elements. [2018-06-22 14:34:11,455 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 14:34:11,455 INFO ]: Initializing ChcToBoogie... [2018-06-22 14:34:11,455 INFO ]: ChcToBoogie initialized [2018-06-22 14:34:11,459 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:34:11" (1/1) ... [2018-06-22 14:34:11,570 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:34:11 Unit [2018-06-22 14:34:11,570 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 14:34:11,571 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 14:34:11,571 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 14:34:11,571 INFO ]: Boogie Preprocessor initialized [2018-06-22 14:34:11,592 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:34:11" (1/1) ... [2018-06-22 14:34:11,592 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:34:11" (1/1) ... [2018-06-22 14:34:11,627 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:34:11" (1/1) ... [2018-06-22 14:34:11,628 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:34:11" (1/1) ... [2018-06-22 14:34:11,671 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:34:11" (1/1) ... [2018-06-22 14:34:11,672 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:34:11" (1/1) ... [2018-06-22 14:34:11,690 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:34:11" (1/1) ... [2018-06-22 14:34:11,702 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 14:34:11,703 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 14:34:11,703 INFO ]: Initializing RCFGBuilder... [2018-06-22 14:34:11,703 INFO ]: RCFGBuilder initialized [2018-06-22 14:34:11,703 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:34:11" (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 14:34:11,716 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 14:34:11,716 INFO ]: Found specification of procedure False [2018-06-22 14:34:11,716 INFO ]: Found implementation of procedure False [2018-06-22 14:34:11,716 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 14:34:11,716 INFO ]: Found specification of procedure state [2018-06-22 14:34:11,716 INFO ]: Found implementation of procedure state [2018-06-22 14:34:11,716 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 14:34:11,716 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 14:34:11,716 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 14:34:14,197 INFO ]: Using library mode [2018-06-22 14:34:14,198 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:34:14 BoogieIcfgContainer [2018-06-22 14:34:14,198 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 14:34:14,199 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 14:34:14,199 INFO ]: Initializing TraceAbstraction... [2018-06-22 14:34:14,205 INFO ]: TraceAbstraction initialized [2018-06-22 14:34:14,206 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:34:11" (1/3) ... [2018-06-22 14:34:14,207 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e8cc0e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 02:34:14, skipping insertion in model container [2018-06-22 14:34:14,207 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:34:11" (2/3) ... [2018-06-22 14:34:14,207 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e8cc0e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 02:34:14, skipping insertion in model container [2018-06-22 14:34:14,207 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:34:14" (3/3) ... [2018-06-22 14:34:14,209 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 14:34:14,220 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 14:34:14,231 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 14:34:14,278 INFO ]: Using default assertion order modulation [2018-06-22 14:34:14,278 INFO ]: Interprodecural is true [2018-06-22 14:34:14,278 INFO ]: Hoare is false [2018-06-22 14:34:14,278 INFO ]: Compute interpolants for FPandBP [2018-06-22 14:34:14,278 INFO ]: Backedges is TWOTRACK [2018-06-22 14:34:14,278 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 14:34:14,278 INFO ]: Difference is false [2018-06-22 14:34:14,278 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 14:34:14,278 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 14:34:14,295 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 14:34:14,310 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 14:34:14,310 INFO ]: Found error trace [2018-06-22 14:34:14,311 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:34:14,311 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:34:14,317 INFO ]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times [2018-06-22 14:34:14,319 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:34:14,319 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:34:14,366 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:34:14,366 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:34:14,366 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:34:14,516 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:34:14,800 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 14:34:14,803 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 14:34:14,803 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 14:34:14,805 INFO ]: Interpolant automaton has 4 states [2018-06-22 14:34:14,822 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 14:34:14,823 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 14:34:14,825 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 14:34:15,105 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:34:15,105 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 14:34:15,107 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 14:34:15,108 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 14:34:15,108 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:34:15,122 INFO ]: With dead ends: 13 [2018-06-22 14:34:15,122 INFO ]: Without dead ends: 13 [2018-06-22 14:34:15,125 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 14:34:15,143 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 14:34:15,165 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 14:34:15,166 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 14:34:15,167 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 14:34:15,168 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 14:34:15,168 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:34:15,168 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 14:34:15,168 INFO ]: Interpolant automaton has 4 states. [2018-06-22 14:34:15,168 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 14:34:15,170 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 14:34:15,170 INFO ]: Found error trace [2018-06-22 14:34:15,170 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:34:15,170 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:34:15,170 INFO ]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times [2018-06-22 14:34:15,170 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:34:15,170 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:34:15,171 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:34:15,171 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:34:15,171 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:34:15,631 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:34:16,385 WARN ]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-22 14:34:16,605 WARN ]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-06-22 14:34:16,943 WARN ]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-06-22 14:34:16,945 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:34:16,945 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:34:16,945 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 14:34:16,961 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:34:17,454 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:34:17,493 INFO ]: Computing forward predicates... [2018-06-22 14:34:17,696 WARN ]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2018-06-22 14:34:20,451 WARN ]: Spent 695.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 27 [2018-06-22 14:34:20,762 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:34:20,799 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:34:20,799 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2018-06-22 14:34:20,800 INFO ]: Interpolant automaton has 10 states [2018-06-22 14:34:20,800 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-22 14:34:20,800 INFO ]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-06-22 14:34:20,800 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 10 states. [2018-06-22 14:34:21,613 WARN ]: Spent 352.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2018-06-22 14:34:21,863 WARN ]: Spent 133.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2018-06-22 14:34:21,933 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:34:21,933 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 14:34:21,934 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 14:34:21,934 INFO ]: Start accepts. Automaton has 10 states. Word has length 13 [2018-06-22 14:34:21,934 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:34:21,935 INFO ]: With dead ends: 15 [2018-06-22 14:34:21,935 INFO ]: Without dead ends: 15 [2018-06-22 14:34:21,936 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2018-06-22 14:34:21,936 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 14:34:21,938 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 14:34:21,938 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 14:34:21,939 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 14:34:21,939 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 14:34:21,939 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:34:21,939 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 14:34:21,939 INFO ]: Interpolant automaton has 10 states. [2018-06-22 14:34:21,939 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 14:34:21,940 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 14:34:21,940 INFO ]: Found error trace [2018-06-22 14:34:21,940 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:34:21,940 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:34:21,940 INFO ]: Analyzing trace with hash -1649658231, now seen corresponding path program 2 times [2018-06-22 14:34:21,940 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:34:21,940 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:34:21,941 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:34:21,941 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:34:21,941 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:34:22,629 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:34:23,725 WARN ]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-22 14:34:23,939 WARN ]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-06-22 14:34:24,185 WARN ]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-06-22 14:34:24,437 WARN ]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-06-22 14:34:24,504 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 14:34:24,504 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:34:24,504 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 14:34:24,511 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 14:34:24,910 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 14:34:24,910 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:34:24,955 INFO ]: Computing forward predicates... [2018-06-22 14:34:27,019 WARN ]: Spent 223.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 25 [2018-06-22 14:34:29,291 WARN ]: Spent 353.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 29 [2018-06-22 14:34:29,644 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 14:34:29,676 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:34:29,676 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2018-06-22 14:34:29,676 INFO ]: Interpolant automaton has 13 states [2018-06-22 14:34:29,676 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-22 14:34:29,677 INFO ]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2018-06-22 14:34:29,677 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 13 states. [2018-06-22 14:34:30,260 WARN ]: Spent 483.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2018-06-22 14:34:30,801 WARN ]: Spent 268.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2018-06-22 14:34:31,349 WARN ]: Spent 471.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2018-06-22 14:34:31,411 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:34:31,411 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-22 14:34:31,412 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 14:34:31,412 INFO ]: Start accepts. Automaton has 13 states. Word has length 17 [2018-06-22 14:34:31,412 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:34:31,413 INFO ]: With dead ends: 19 [2018-06-22 14:34:31,413 INFO ]: Without dead ends: 19 [2018-06-22 14:34:31,413 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2018-06-22 14:34:31,414 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 14:34:31,416 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 14:34:31,416 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 14:34:31,417 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-22 14:34:31,417 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 17 [2018-06-22 14:34:31,417 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:34:31,417 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-22 14:34:31,417 INFO ]: Interpolant automaton has 13 states. [2018-06-22 14:34:31,417 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-22 14:34:31,418 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 14:34:31,418 INFO ]: Found error trace [2018-06-22 14:34:31,418 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:34:31,418 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:34:31,418 INFO ]: Analyzing trace with hash 1762711629, now seen corresponding path program 3 times [2018-06-22 14:34:31,418 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:34:31,418 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:34:31,419 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:34:31,419 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:34:31,419 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:34:32,160 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:34:33,510 WARN ]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-22 14:34:33,963 WARN ]: Spent 405.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-06-22 14:34:34,340 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 14:34:34,340 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:34:34,340 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 [2018-06-22 14:34:34,353 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 14:34:35,232 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-06-22 14:34:35,232 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:34:35,300 INFO ]: Computing forward predicates... [2018-06-22 14:34:37,730 WARN ]: Spent 952.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 44 Received shutdown request... [2018-06-22 14:35:06,675 INFO ]: Timeout while computing interpolants [2018-06-22 14:35:06,875 WARN ]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:35:06,875 WARN ]: Verification canceled [2018-06-22 14:35:06,890 WARN ]: Timeout [2018-06-22 14:35:06,890 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 02:35:06 BoogieIcfgContainer [2018-06-22 14:35:06,890 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 14:35:06,891 INFO ]: Toolchain (without parser) took 55441.84 ms. Allocated memory was 409.5 MB in the beginning and 1.5 GB in the end (delta: 1.1 GB). Free memory was 191.6 MB in the beginning and 1.1 GB in the end (delta: -907.2 MB). Peak memory consumption was 1.2 GB. Max. memory is 3.6 GB. [2018-06-22 14:35:06,892 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 307.8 MB. Free memory is still 273.2 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 14:35:06,892 INFO ]: ChcToBoogie took 115.55 ms. Allocated memory is still 409.5 MB. Free memory was 188.3 MB in the beginning and 184.9 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 3.6 GB. [2018-06-22 14:35:06,893 INFO ]: Boogie Preprocessor took 131.36 ms. Allocated memory is still 409.5 MB. Free memory was 184.9 MB in the beginning and 174.9 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 3.6 GB. [2018-06-22 14:35:06,893 INFO ]: RCFGBuilder took 2495.49 ms. Allocated memory was 409.5 MB in the beginning and 524.3 MB in the end (delta: 114.8 MB). Free memory was 174.9 MB in the beginning and 382.6 MB in the end (delta: -207.7 MB). Peak memory consumption was 122.0 MB. Max. memory is 3.6 GB. [2018-06-22 14:35:06,893 INFO ]: TraceAbstraction took 52690.98 ms. Allocated memory was 524.3 MB in the beginning and 1.5 GB in the end (delta: 967.8 MB). Free memory was 382.6 MB in the beginning and 1.1 GB in the end (delta: -716.2 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-22 14:35:06,905 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 307.8 MB. Free memory is still 273.2 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 115.55 ms. Allocated memory is still 409.5 MB. Free memory was 188.3 MB in the beginning and 184.9 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 131.36 ms. Allocated memory is still 409.5 MB. Free memory was 184.9 MB in the beginning and 174.9 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 2495.49 ms. Allocated memory was 409.5 MB in the beginning and 524.3 MB in the end (delta: 114.8 MB). Free memory was 174.9 MB in the beginning and 382.6 MB in the end (delta: -207.7 MB). Peak memory consumption was 122.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 52690.98 ms. Allocated memory was 524.3 MB in the beginning and 1.5 GB in the end (delta: 967.8 MB). Free memory was 382.6 MB in the beginning and 1.1 GB in the end (delta: -716.2 MB). Peak memory consumption was 1.3 GB. 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 26 with TraceHistMax 5, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 41 quantified variables from 15 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 52.6s OverallTime, 4 OverallIterations, 5 TraceHistogramMax, 3.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 34 SDtfs, 26 SDslu, 97 SDs, 0 SdLazy, 70 SolverSat, 32 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 5.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred 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: 0.4s SsaConstructionTime, 1.7s SatisfiabilityAnalysisTime, 11.5s InterpolantComputationTime, 69 NumberOfCodeBlocks, 69 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 64 ConstructedInterpolants, 0 QuantifiedInterpolants, 8756 SizeOfPredicates, 2068 NumberOfNonLiveVariables, 3194 ConjunctsInSsa, 35 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.7.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_14-35-06-933.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/token_ring.7.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_14-35-06-933.csv Completed graceful shutdown