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_Goto.epf -i /storage/chc-comp/vmt-chc-benchmarks/cav12/token_ring.11.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 04:48:22,465 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 04:48:22,468 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 04:48:22,481 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 04:48:22,481 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 04:48:22,482 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 04:48:22,483 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 04:48:22,487 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 04:48:22,488 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 04:48:22,490 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 04:48:22,491 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 04:48:22,491 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 04:48:22,492 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 04:48:22,493 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 04:48:22,493 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 04:48:22,497 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 04:48:22,498 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 04:48:22,507 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 04:48:22,509 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 04:48:22,513 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 04:48:22,514 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 04:48:22,516 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 04:48:22,516 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 04:48:22,516 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 04:48:22,517 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 04:48:22,518 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 04:48:22,518 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 04:48:22,521 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 04:48:22,521 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 04:48:22,522 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 04:48:22,522 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 04:48:22,523 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 04:48:22,523 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 04:48:22,524 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 04:48:22,528 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 04:48:22,528 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 04:48:22,545 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 04:48:22,546 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 04:48:22,548 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 04:48:22,548 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 04:48:22,549 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 04:48:22,549 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 04:48:22,549 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 04:48:22,550 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 04:48:22,550 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 04:48:22,550 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 04:48:22,550 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 04:48:22,550 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 04:48:22,550 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 04:48:22,551 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 04:48:22,551 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 04:48:22,552 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 04:48:22,552 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 04:48:22,553 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 04:48:22,553 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 04:48:22,604 INFO ]: Repository-Root is: /tmp [2018-06-22 04:48:22,617 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 04:48:22,623 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 04:48:22,624 INFO ]: Initializing SmtParser... [2018-06-22 04:48:22,625 INFO ]: SmtParser initialized [2018-06-22 04:48:22,625 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/cav12/token_ring.11.smt2 [2018-06-22 04:48:22,627 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 04:48:22,710 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/token_ring.11.smt2 unknown [2018-06-22 04:48:29,272 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/token_ring.11.smt2 [2018-06-22 04:48:29,276 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 04:48:29,283 INFO ]: Walking toolchain with 4 elements. [2018-06-22 04:48:29,283 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 04:48:29,283 INFO ]: Initializing ChcToBoogie... [2018-06-22 04:48:29,283 INFO ]: ChcToBoogie initialized [2018-06-22 04:48:29,287 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 04:48:29" (1/1) ... [2018-06-22 04:48:29,435 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:48:29 Unit [2018-06-22 04:48:29,436 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 04:48:29,436 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 04:48:29,436 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 04:48:29,436 INFO ]: Boogie Preprocessor initialized [2018-06-22 04:48:29,456 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:48:29" (1/1) ... [2018-06-22 04:48:29,456 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:48:29" (1/1) ... [2018-06-22 04:48:29,547 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:48:29" (1/1) ... [2018-06-22 04:48:29,548 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:48:29" (1/1) ... [2018-06-22 04:48:29,613 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:48:29" (1/1) ... [2018-06-22 04:48:29,615 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:48:29" (1/1) ... [2018-06-22 04:48:29,639 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:48:29" (1/1) ... [2018-06-22 04:48:29,667 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 04:48:29,667 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 04:48:29,667 INFO ]: Initializing RCFGBuilder... [2018-06-22 04:48:29,667 INFO ]: RCFGBuilder initialized [2018-06-22 04:48:29,668 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:48:29" (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 04:48:29,681 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 04:48:29,681 INFO ]: Found specification of procedure gotoProc [2018-06-22 04:48:29,681 INFO ]: Found implementation of procedure gotoProc [2018-06-22 04:48:29,681 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 04:48:29,681 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 04:48:29,681 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 04:48:35,797 INFO ]: Using library mode [2018-06-22 04:48:35,797 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 04:48:35 BoogieIcfgContainer [2018-06-22 04:48:35,798 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 04:48:35,800 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 04:48:35,800 INFO ]: Initializing TraceAbstraction... [2018-06-22 04:48:35,803 INFO ]: TraceAbstraction initialized [2018-06-22 04:48:35,803 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 04:48:29" (1/3) ... [2018-06-22 04:48:35,804 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3123231d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 04:48:35, skipping insertion in model container [2018-06-22 04:48:35,804 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:48:29" (2/3) ... [2018-06-22 04:48:35,804 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3123231d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 04:48:35, skipping insertion in model container [2018-06-22 04:48:35,804 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 04:48:35" (3/3) ... [2018-06-22 04:48:35,806 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 04:48:35,816 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 04:48:35,825 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 04:48:35,874 INFO ]: Using default assertion order modulation [2018-06-22 04:48:35,875 INFO ]: Interprodecural is true [2018-06-22 04:48:35,875 INFO ]: Hoare is false [2018-06-22 04:48:35,875 INFO ]: Compute interpolants for FPandBP [2018-06-22 04:48:35,875 INFO ]: Backedges is TWOTRACK [2018-06-22 04:48:35,875 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 04:48:35,875 INFO ]: Difference is false [2018-06-22 04:48:35,875 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 04:48:35,875 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 04:48:35,888 INFO ]: Start isEmpty. Operand 10 states. [2018-06-22 04:48:35,901 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-22 04:48:35,901 INFO ]: Found error trace [2018-06-22 04:48:35,902 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-22 04:48:35,902 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 04:48:35,908 INFO ]: Analyzing trace with hash 1284994894, now seen corresponding path program 1 times [2018-06-22 04:48:35,910 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 04:48:35,910 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 04:48:35,945 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:48:35,945 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 04:48:35,945 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:48:36,240 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:48:36,493 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:48:36,496 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 04:48:36,496 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 04:48:36,498 INFO ]: Interpolant automaton has 3 states [2018-06-22 04:48:36,513 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 04:48:36,514 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 04:48:36,516 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-22 04:48:36,860 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 04:48:36,860 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-22 04:48:36,863 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 04:48:36,864 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-22 04:48:36,864 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 04:48:36,874 INFO ]: With dead ends: 9 [2018-06-22 04:48:36,874 INFO ]: Without dead ends: 9 [2018-06-22 04:48:36,878 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 04:48:36,896 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-22 04:48:36,914 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-22 04:48:36,916 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-22 04:48:36,916 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-22 04:48:36,918 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-22 04:48:36,918 INFO ]: Finished accepts. word is rejected. [2018-06-22 04:48:36,918 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-22 04:48:36,918 INFO ]: Interpolant automaton has 3 states. [2018-06-22 04:48:36,918 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-22 04:48:36,918 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 04:48:36,918 INFO ]: Found error trace [2018-06-22 04:48:36,918 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 04:48:36,918 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 04:48:36,919 INFO ]: Analyzing trace with hash 1180964567, now seen corresponding path program 1 times [2018-06-22 04:48:36,919 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 04:48:36,919 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 04:48:36,919 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:48:36,919 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 04:48:36,919 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:48:37,828 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:48:39,108 WARN ]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-06-22 04:48:39,223 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:48:39,223 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 04:48:39,223 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) [2018-06-22 04:48:39,238 INFO ]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 04:48:40,064 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:48:40,136 INFO ]: Computing forward predicates... [2018-06-22 04:48:40,603 WARN ]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-06-22 04:48:43,361 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:48:43,393 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 04:48:43,393 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-06-22 04:48:43,393 INFO ]: Interpolant automaton has 6 states [2018-06-22 04:48:43,394 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 04:48:43,394 INFO ]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-06-22 04:48:43,394 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 6 states. [2018-06-22 04:48:43,752 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 04:48:43,752 INFO ]: Finished difference Result 10 states and 10 transitions. [2018-06-22 04:48:43,753 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 04:48:43,753 INFO ]: Start accepts. Automaton has 6 states. Word has length 8 [2018-06-22 04:48:43,753 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 04:48:43,753 INFO ]: With dead ends: 10 [2018-06-22 04:48:43,753 INFO ]: Without dead ends: 10 [2018-06-22 04:48:43,754 INFO ]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2018-06-22 04:48:43,754 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-22 04:48:43,755 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-22 04:48:43,755 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-22 04:48:43,756 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-06-22 04:48:43,756 INFO ]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-06-22 04:48:43,756 INFO ]: Finished accepts. word is rejected. [2018-06-22 04:48:43,756 INFO ]: Abstraction has 10 states and 10 transitions. [2018-06-22 04:48:43,756 INFO ]: Interpolant automaton has 6 states. [2018-06-22 04:48:43,756 INFO ]: Start isEmpty. Operand 10 states and 10 transitions. [2018-06-22 04:48:43,756 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 04:48:43,756 INFO ]: Found error trace [2018-06-22 04:48:43,756 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 04:48:43,756 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 04:48:43,756 INFO ]: Analyzing trace with hash -2043975570, now seen corresponding path program 2 times [2018-06-22 04:48:43,756 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 04:48:43,756 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 04:48:43,757 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:48:43,757 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 04:48:43,757 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:48:44,900 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:48:46,570 WARN ]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-06-22 04:48:46,586 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:48:46,587 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 04:48:46,587 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 04:48:46,594 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 04:48:48,023 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 04:48:48,023 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:48:48,120 INFO ]: Computing forward predicates... [2018-06-22 04:48:52,449 WARN ]: Spent 126.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 20 [2018-06-22 04:48:52,456 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:48:52,485 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 04:48:52,485 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2018-06-22 04:48:52,485 INFO ]: Interpolant automaton has 8 states [2018-06-22 04:48:52,485 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 04:48:52,485 INFO ]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-06-22 04:48:52,485 INFO ]: Start difference. First operand 10 states and 10 transitions. Second operand 8 states. [2018-06-22 04:48:52,886 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 04:48:52,886 INFO ]: Finished difference Result 12 states and 12 transitions. [2018-06-22 04:48:52,887 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 04:48:52,887 INFO ]: Start accepts. Automaton has 8 states. Word has length 9 [2018-06-22 04:48:52,887 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 04:48:52,888 INFO ]: With dead ends: 12 [2018-06-22 04:48:52,888 INFO ]: Without dead ends: 12 [2018-06-22 04:48:52,888 INFO ]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2018-06-22 04:48:52,888 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-22 04:48:52,889 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-06-22 04:48:52,889 INFO ]: Start removeUnreachable. Operand 12 states. [2018-06-22 04:48:52,890 INFO ]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-06-22 04:48:52,890 INFO ]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2018-06-22 04:48:52,890 INFO ]: Finished accepts. word is rejected. [2018-06-22 04:48:52,890 INFO ]: Abstraction has 12 states and 12 transitions. [2018-06-22 04:48:52,890 INFO ]: Interpolant automaton has 8 states. [2018-06-22 04:48:52,890 INFO ]: Start isEmpty. Operand 12 states and 12 transitions. [2018-06-22 04:48:52,890 INFO ]: Finished isEmpty. Found accepting run of length 12 [2018-06-22 04:48:52,890 INFO ]: Found error trace [2018-06-22 04:48:52,890 INFO ]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 04:48:52,890 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 04:48:52,891 INFO ]: Analyzing trace with hash -1433955954, now seen corresponding path program 3 times [2018-06-22 04:48:52,891 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 04:48:52,891 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 04:48:52,891 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:48:52,891 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 04:48:52,891 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:48:54,351 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:48:56,868 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:48:56,868 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 04:48:56,868 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 04:48:56,875 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 04:48:58,897 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-22 04:48:58,897 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:48:59,045 INFO ]: Computing forward predicates... [2018-06-22 04:49:12,717 WARN ]: Spent 102.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 23 Received shutdown request... [2018-06-22 04:49:21,631 INFO ]: Timeout while computing interpolants [2018-06-22 04:49:21,831 WARN ]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 04:49:21,832 WARN ]: Verification canceled [2018-06-22 04:49:21,836 WARN ]: Timeout [2018-06-22 04:49:21,836 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 04:49:21 BoogieIcfgContainer [2018-06-22 04:49:21,836 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 04:49:21,837 INFO ]: Toolchain (without parser) took 52560.08 ms. Allocated memory was 910.7 MB in the beginning and 1.6 GB in the end (delta: 719.8 MB). Free memory was 461.0 MB in the beginning and 832.5 MB in the end (delta: -371.5 MB). Peak memory consumption was 1.0 GB. Max. memory is 3.6 GB. [2018-06-22 04:49:21,838 INFO ]: SmtParser took 0.08 ms. Allocated memory is still 300.4 MB. Free memory is still 265.9 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 04:49:21,838 INFO ]: ChcToBoogie took 152.79 ms. Allocated memory is still 910.7 MB. Free memory is still 461.0 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 04:49:21,838 INFO ]: Boogie Preprocessor took 230.72 ms. Allocated memory is still 910.7 MB. Free memory was 461.0 MB in the beginning and 434.3 MB in the end (delta: 26.8 MB). Peak memory consumption was 26.8 MB. Max. memory is 3.6 GB. [2018-06-22 04:49:21,838 INFO ]: RCFGBuilder took 6130.13 ms. Allocated memory was 910.7 MB in the beginning and 1.4 GB in the end (delta: 471.9 MB). Free memory was 434.3 MB in the beginning and 921.5 MB in the end (delta: -487.3 MB). Peak memory consumption was 696.4 MB. Max. memory is 3.6 GB. [2018-06-22 04:49:21,839 INFO ]: TraceAbstraction took 46036.42 ms. Allocated memory was 1.4 GB in the beginning and 1.6 GB in the end (delta: 248.0 MB). Free memory was 921.5 MB in the beginning and 832.5 MB in the end (delta: 89.0 MB). Peak memory consumption was 1.0 GB. Max. memory is 3.6 GB. [2018-06-22 04:49:21,843 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.08 ms. Allocated memory is still 300.4 MB. Free memory is still 265.9 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 152.79 ms. Allocated memory is still 910.7 MB. Free memory is still 461.0 MB. There was no memory consumed. Max. memory is 3.6 GB. * Boogie Preprocessor took 230.72 ms. Allocated memory is still 910.7 MB. Free memory was 461.0 MB in the beginning and 434.3 MB in the end (delta: 26.8 MB). Peak memory consumption was 26.8 MB. Max. memory is 3.6 GB. * RCFGBuilder took 6130.13 ms. Allocated memory was 910.7 MB in the beginning and 1.4 GB in the end (delta: 471.9 MB). Free memory was 434.3 MB in the beginning and 921.5 MB in the end (delta: -487.3 MB). Peak memory consumption was 696.4 MB. Max. memory is 3.6 GB. * TraceAbstraction took 46036.42 ms. Allocated memory was 1.4 GB in the beginning and 1.6 GB in the end (delta: 248.0 MB). Free memory was 921.5 MB in the beginning and 832.5 MB in the end (delta: 89.0 MB). Peak memory consumption was 1.0 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 12 with TraceHistMax 4, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 156 quantified variables from 31 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. TIMEOUT Result, 45.9s OverallTime, 4 OverallIterations, 4 TraceHistogramMax, 1.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 21 SDtfs, 0 SDslu, 40 SDs, 0 SdLazy, 21 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12occurred 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: 1.0s SsaConstructionTime, 3.5s SatisfiabilityAnalysisTime, 11.0s InterpolantComputationTime, 41 NumberOfCodeBlocks, 41 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 36 ConstructedInterpolants, 0 QuantifiedInterpolants, 972 SizeOfPredicates, 6 NumberOfNonLiveVariables, 8533 ConjunctsInSsa, 42 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 0/8 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.11.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_04-49-21-853.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/token_ring.11.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_04-49-21-853.csv Completed graceful shutdown