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.3.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 04:51:24,022 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 04:51:24,025 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 04:51:24,039 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 04:51:24,039 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 04:51:24,041 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 04:51:24,042 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 04:51:24,049 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 04:51:24,051 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 04:51:24,051 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 04:51:24,053 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 04:51:24,054 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 04:51:24,054 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 04:51:24,055 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 04:51:24,056 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 04:51:24,058 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 04:51:24,060 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 04:51:24,062 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 04:51:24,072 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 04:51:24,074 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 04:51:24,075 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 04:51:24,076 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 04:51:24,077 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 04:51:24,077 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 04:51:24,078 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 04:51:24,081 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 04:51:24,082 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 04:51:24,083 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 04:51:24,083 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 04:51:24,084 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 04:51:24,084 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 04:51:24,085 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 04:51:24,085 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 04:51:24,088 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 04:51:24,089 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 04:51:24,089 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 04:51:24,108 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 04:51:24,109 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 04:51:24,109 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 04:51:24,109 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 04:51:24,111 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 04:51:24,111 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 04:51:24,111 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 04:51:24,111 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 04:51:24,112 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 04:51:24,112 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 04:51:24,112 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 04:51:24,112 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 04:51:24,112 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 04:51:24,113 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 04:51:24,113 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 04:51:24,113 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 04:51:24,113 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 04:51:24,117 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 04:51:24,117 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 04:51:24,166 INFO ]: Repository-Root is: /tmp [2018-06-22 04:51:24,177 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 04:51:24,183 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 04:51:24,184 INFO ]: Initializing SmtParser... [2018-06-22 04:51:24,184 INFO ]: SmtParser initialized [2018-06-22 04:51:24,185 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/cav12/token_ring.3.smt2 [2018-06-22 04:51:24,187 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 04:51:24,279 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/token_ring.3.smt2 unknown [2018-06-22 04:51:25,303 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/token_ring.3.smt2 [2018-06-22 04:51:25,308 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 04:51:25,319 INFO ]: Walking toolchain with 4 elements. [2018-06-22 04:51:25,319 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 04:51:25,319 INFO ]: Initializing ChcToBoogie... [2018-06-22 04:51:25,319 INFO ]: ChcToBoogie initialized [2018-06-22 04:51:25,332 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 04:51:25" (1/1) ... [2018-06-22 04:51:25,437 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:51:25 Unit [2018-06-22 04:51:25,437 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 04:51:25,438 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 04:51:25,438 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 04:51:25,438 INFO ]: Boogie Preprocessor initialized [2018-06-22 04:51:25,466 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:51:25" (1/1) ... [2018-06-22 04:51:25,467 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:51:25" (1/1) ... [2018-06-22 04:51:25,501 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:51:25" (1/1) ... [2018-06-22 04:51:25,501 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:51:25" (1/1) ... [2018-06-22 04:51:25,527 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:51:25" (1/1) ... [2018-06-22 04:51:25,528 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:51:25" (1/1) ... [2018-06-22 04:51:25,536 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:51:25" (1/1) ... [2018-06-22 04:51:25,549 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 04:51:25,549 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 04:51:25,550 INFO ]: Initializing RCFGBuilder... [2018-06-22 04:51:25,550 INFO ]: RCFGBuilder initialized [2018-06-22 04:51:25,550 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:51:25" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 04:51:25,574 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 04:51:25,574 INFO ]: Found specification of procedure gotoProc [2018-06-22 04:51:25,574 INFO ]: Found implementation of procedure gotoProc [2018-06-22 04:51:25,574 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 04:51:25,574 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 04:51:25,574 INFO ]: Found implementation of procedure Ultimate.START [2018-06-22 04:51:26,370 INFO ]: Using library mode [2018-06-22 04:51:26,370 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 04:51:26 BoogieIcfgContainer [2018-06-22 04:51:26,370 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 04:51:26,404 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 04:51:26,404 INFO ]: Initializing TraceAbstraction... [2018-06-22 04:51:26,407 INFO ]: TraceAbstraction initialized [2018-06-22 04:51:26,408 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 04:51:25" (1/3) ... [2018-06-22 04:51:26,411 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@529487e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 04:51:26, skipping insertion in model container [2018-06-22 04:51:26,411 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:51:25" (2/3) ... [2018-06-22 04:51:26,412 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@529487e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 04:51:26, skipping insertion in model container [2018-06-22 04:51:26,412 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 04:51:26" (3/3) ... [2018-06-22 04:51:26,413 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 04:51:26,423 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 04:51:26,432 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 04:51:26,482 INFO ]: Using default assertion order modulation [2018-06-22 04:51:26,483 INFO ]: Interprodecural is true [2018-06-22 04:51:26,483 INFO ]: Hoare is false [2018-06-22 04:51:26,483 INFO ]: Compute interpolants for FPandBP [2018-06-22 04:51:26,483 INFO ]: Backedges is TWOTRACK [2018-06-22 04:51:26,483 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 04:51:26,483 INFO ]: Difference is false [2018-06-22 04:51:26,483 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 04:51:26,483 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 04:51:26,504 INFO ]: Start isEmpty. Operand 10 states. [2018-06-22 04:51:26,515 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-22 04:51:26,515 INFO ]: Found error trace [2018-06-22 04:51:26,515 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-22 04:51:26,516 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 04:51:26,521 INFO ]: Analyzing trace with hash 1285054476, now seen corresponding path program 1 times [2018-06-22 04:51:26,523 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 04:51:26,523 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 04:51:26,572 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:51:26,572 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 04:51:26,572 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:51:26,709 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:51:26,876 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:51:26,879 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 04:51:26,879 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 04:51:26,881 INFO ]: Interpolant automaton has 3 states [2018-06-22 04:51:26,896 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 04:51:26,897 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 04:51:26,899 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-22 04:51:27,044 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 04:51:27,044 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-22 04:51:27,046 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 04:51:27,048 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-22 04:51:27,048 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 04:51:27,057 INFO ]: With dead ends: 9 [2018-06-22 04:51:27,057 INFO ]: Without dead ends: 9 [2018-06-22 04:51:27,062 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 04:51:27,080 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-22 04:51:27,105 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-22 04:51:27,110 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-22 04:51:27,110 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-22 04:51:27,112 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-22 04:51:27,112 INFO ]: Finished accepts. word is rejected. [2018-06-22 04:51:27,112 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-22 04:51:27,112 INFO ]: Interpolant automaton has 3 states. [2018-06-22 04:51:27,112 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-22 04:51:27,112 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 04:51:27,112 INFO ]: Found error trace [2018-06-22 04:51:27,112 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 04:51:27,112 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 04:51:27,112 INFO ]: Analyzing trace with hash 1180100628, now seen corresponding path program 1 times [2018-06-22 04:51:27,113 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 04:51:27,113 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 04:51:27,114 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:51:27,114 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 04:51:27,114 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:51:27,315 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:51:27,607 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:51:27,607 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 04:51:27,607 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 04:51:27,613 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 04:51:27,926 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:51:27,947 INFO ]: Computing forward predicates... [2018-06-22 04:51:28,970 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:51:28,992 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 04:51:28,992 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-06-22 04:51:28,993 INFO ]: Interpolant automaton has 6 states [2018-06-22 04:51:28,993 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 04:51:28,993 INFO ]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-06-22 04:51:28,993 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 6 states. [2018-06-22 04:51:29,061 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 04:51:29,061 INFO ]: Finished difference Result 10 states and 10 transitions. [2018-06-22 04:51:29,061 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-22 04:51:29,061 INFO ]: Start accepts. Automaton has 6 states. Word has length 8 [2018-06-22 04:51:29,062 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 04:51:29,062 INFO ]: With dead ends: 10 [2018-06-22 04:51:29,062 INFO ]: Without dead ends: 10 [2018-06-22 04:51:29,063 INFO ]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-06-22 04:51:29,063 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-22 04:51:29,063 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-22 04:51:29,063 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-22 04:51:29,064 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-06-22 04:51:29,064 INFO ]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-06-22 04:51:29,064 INFO ]: Finished accepts. word is rejected. [2018-06-22 04:51:29,064 INFO ]: Abstraction has 10 states and 10 transitions. [2018-06-22 04:51:29,064 INFO ]: Interpolant automaton has 6 states. [2018-06-22 04:51:29,064 INFO ]: Start isEmpty. Operand 10 states and 10 transitions. [2018-06-22 04:51:29,064 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 04:51:29,064 INFO ]: Found error trace [2018-06-22 04:51:29,064 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 04:51:29,064 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 04:51:29,064 INFO ]: Analyzing trace with hash -2073468660, now seen corresponding path program 2 times [2018-06-22 04:51:29,064 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 04:51:29,064 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 04:51:29,065 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:51:29,065 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 04:51:29,065 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:51:29,277 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:51:29,681 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:51:29,681 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 04:51:29,681 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 04:51:29,689 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 04:51:30,049 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 04:51:30,049 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:51:30,071 INFO ]: Computing forward predicates... [2018-06-22 04:51:31,511 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:51:31,533 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 04:51:31,534 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2018-06-22 04:51:31,534 INFO ]: Interpolant automaton has 8 states [2018-06-22 04:51:31,534 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 04:51:31,534 INFO ]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-06-22 04:51:31,534 INFO ]: Start difference. First operand 10 states and 10 transitions. Second operand 8 states. [2018-06-22 04:51:31,661 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 04:51:31,661 INFO ]: Finished difference Result 12 states and 12 transitions. [2018-06-22 04:51:31,662 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 04:51:31,662 INFO ]: Start accepts. Automaton has 8 states. Word has length 9 [2018-06-22 04:51:31,662 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 04:51:31,662 INFO ]: With dead ends: 12 [2018-06-22 04:51:31,662 INFO ]: Without dead ends: 12 [2018-06-22 04:51:31,662 INFO ]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2018-06-22 04:51:31,663 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-22 04:51:31,664 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-06-22 04:51:31,664 INFO ]: Start removeUnreachable. Operand 12 states. [2018-06-22 04:51:31,664 INFO ]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-06-22 04:51:31,664 INFO ]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2018-06-22 04:51:31,664 INFO ]: Finished accepts. word is rejected. [2018-06-22 04:51:31,664 INFO ]: Abstraction has 12 states and 12 transitions. [2018-06-22 04:51:31,664 INFO ]: Interpolant automaton has 8 states. [2018-06-22 04:51:31,664 INFO ]: Start isEmpty. Operand 12 states and 12 transitions. [2018-06-22 04:51:31,665 INFO ]: Finished isEmpty. Found accepting run of length 12 [2018-06-22 04:51:31,665 INFO ]: Found error trace [2018-06-22 04:51:31,665 INFO ]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 04:51:31,665 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 04:51:31,665 INFO ]: Analyzing trace with hash 201204236, now seen corresponding path program 3 times [2018-06-22 04:51:31,665 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 04:51:31,665 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 04:51:31,666 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:51:31,666 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 04:51:31,666 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:51:31,960 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:51:32,618 WARN ]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-06-22 04:51:33,019 WARN ]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-06-22 04:51:33,319 WARN ]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-06-22 04:51:33,568 WARN ]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-06-22 04:51:33,569 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:51:33,569 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 04:51:33,569 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 04:51:33,586 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 04:51:34,108 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-22 04:51:34,108 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:51:34,147 INFO ]: Computing forward predicates... Received shutdown request... [2018-06-22 04:52:29,138 INFO ]: Timeout while computing interpolants [2018-06-22 04:52:29,339 WARN ]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 04:52:29,339 WARN ]: Verification canceled [2018-06-22 04:52:29,344 WARN ]: Timeout [2018-06-22 04:52:29,344 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 04:52:29 BoogieIcfgContainer [2018-06-22 04:52:29,344 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 04:52:29,345 INFO ]: Toolchain (without parser) took 64036.19 ms. Allocated memory was 334.5 MB in the beginning and 1.5 GB in the end (delta: 1.1 GB). Free memory was 284.7 MB in the beginning and 1.4 GB in the end (delta: -1.1 GB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-22 04:52:29,346 INFO ]: SmtParser took 0.09 ms. Allocated memory is still 308.8 MB. Free memory is still 273.3 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 04:52:29,346 INFO ]: ChcToBoogie took 118.43 ms. Allocated memory is still 334.5 MB. Free memory was 284.7 MB in the beginning and 282.3 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 3.6 GB. [2018-06-22 04:52:29,346 INFO ]: Boogie Preprocessor took 111.09 ms. Allocated memory is still 334.5 MB. Free memory was 282.3 MB in the beginning and 277.4 MB in the end (delta: 4.9 MB). Peak memory consumption was 4.9 MB. Max. memory is 3.6 GB. [2018-06-22 04:52:29,347 INFO ]: RCFGBuilder took 820.80 ms. Allocated memory is still 334.5 MB. Free memory was 277.4 MB in the beginning and 175.1 MB in the end (delta: 102.2 MB). Peak memory consumption was 102.2 MB. Max. memory is 3.6 GB. [2018-06-22 04:52:29,347 INFO ]: TraceAbstraction took 62939.70 ms. Allocated memory was 385.4 MB in the beginning and 1.5 GB in the end (delta: 1.1 GB). Free memory was 355.1 MB in the beginning and 1.4 GB in the end (delta: -1.0 GB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-22 04:52:29,355 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.09 ms. Allocated memory is still 308.8 MB. Free memory is still 273.3 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 118.43 ms. Allocated memory is still 334.5 MB. Free memory was 284.7 MB in the beginning and 282.3 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 111.09 ms. Allocated memory is still 334.5 MB. Free memory was 282.3 MB in the beginning and 277.4 MB in the end (delta: 4.9 MB). Peak memory consumption was 4.9 MB. Max. memory is 3.6 GB. * RCFGBuilder took 820.80 ms. Allocated memory is still 334.5 MB. Free memory was 277.4 MB in the beginning and 175.1 MB in the end (delta: 102.2 MB). Peak memory consumption was 102.2 MB. Max. memory is 3.6 GB. * TraceAbstraction took 62939.70 ms. Allocated memory was 385.4 MB in the beginning and 1.5 GB in the end (delta: 1.1 GB). Free memory was 355.1 MB in the beginning and 1.4 GB in the end (delta: -1.0 GB). 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 12 with TraceHistMax 4, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 37 quantified variables from 8 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. TIMEOUT Result, 62.8s OverallTime, 4 OverallIterations, 4 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 21 SDtfs, 3 SDslu, 37 SDs, 0 SdLazy, 19 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s 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: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 3.3s InterpolantComputationTime, 41 NumberOfCodeBlocks, 41 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 36 ConstructedInterpolants, 0 QuantifiedInterpolants, 772 SizeOfPredicates, 6 NumberOfNonLiveVariables, 1690 ConjunctsInSsa, 29 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.3.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_04-52-29-370.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/token_ring.3.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_04-52-29-370.csv Completed graceful shutdown