java -Xss4m -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.5.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-14921ce [2018-06-25 12:29:42,485 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-25 12:29:42,487 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-25 12:29:42,503 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-25 12:29:42,503 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-25 12:29:42,504 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-25 12:29:42,505 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-25 12:29:42,508 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-25 12:29:42,509 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-25 12:29:42,511 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-25 12:29:42,512 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-25 12:29:42,512 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-25 12:29:42,513 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-25 12:29:42,514 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-25 12:29:42,518 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-25 12:29:42,519 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-25 12:29:42,521 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-25 12:29:42,530 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-25 12:29:42,531 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-25 12:29:42,532 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-25 12:29:42,535 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-25 12:29:42,537 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-25 12:29:42,538 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-25 12:29:42,538 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-25 12:29:42,538 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-25 12:29:42,541 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-25 12:29:42,542 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-25 12:29:42,542 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-25 12:29:42,543 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-25 12:29:42,543 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-25 12:29:42,548 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-25 12:29:42,549 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-25 12:29:42,549 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-25 12:29:42,550 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-25 12:29:42,550 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-25 12:29:42,551 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-25 12:29:42,564 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-25 12:29:42,565 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-25 12:29:42,565 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-25 12:29:42,565 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-25 12:29:42,566 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-25 12:29:42,566 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-25 12:29:42,567 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-25 12:29:42,567 INFO L133 SettingsManager]: * Use SBE=true [2018-06-25 12:29:42,567 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-25 12:29:42,567 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-25 12:29:42,567 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-25 12:29:42,568 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-25 12:29:42,568 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-25 12:29:42,568 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-25 12:29:42,568 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-25 12:29:42,568 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-25 12:29:42,569 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-25 12:29:42,569 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-25 12:29:42,569 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-25 12:29:42,569 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-25 12:29:42,569 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-25 12:29:42,571 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-25 12:29:42,571 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-25 12:29:42,604 INFO ]: Repository-Root is: /tmp [2018-06-25 12:29:42,623 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-25 12:29:42,628 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-25 12:29:42,629 INFO ]: Initializing SmtParser... [2018-06-25 12:29:42,630 INFO ]: SmtParser initialized [2018-06-25 12:29:42,630 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/cav12/token_ring.5.smt2 [2018-06-25 12:29:42,631 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 [2018-06-25 12:29:42,721 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/token_ring.5.smt2 unknown [2018-06-25 12:29:44,513 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/token_ring.5.smt2 [2018-06-25 12:29:44,518 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-25 12:29:44,523 INFO ]: Walking toolchain with 4 elements. [2018-06-25 12:29:44,523 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-25 12:29:44,523 INFO ]: Initializing ChcToBoogie... [2018-06-25 12:29:44,523 INFO ]: ChcToBoogie initialized [2018-06-25 12:29:44,526 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 12:29:44" (1/1) ... [2018-06-25 12:29:44,649 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:29:44 Unit [2018-06-25 12:29:44,649 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-25 12:29:44,650 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-25 12:29:44,650 INFO ]: Initializing Boogie Preprocessor... [2018-06-25 12:29:44,650 INFO ]: Boogie Preprocessor initialized [2018-06-25 12:29:44,670 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:29:44" (1/1) ... [2018-06-25 12:29:44,671 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:29:44" (1/1) ... [2018-06-25 12:29:44,715 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:29:44" (1/1) ... [2018-06-25 12:29:44,715 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:29:44" (1/1) ... [2018-06-25 12:29:44,754 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:29:44" (1/1) ... [2018-06-25 12:29:44,755 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:29:44" (1/1) ... [2018-06-25 12:29:44,765 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:29:44" (1/1) ... [2018-06-25 12:29:44,776 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-25 12:29:44,777 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-25 12:29:44,777 INFO ]: Initializing RCFGBuilder... [2018-06-25 12:29:44,777 INFO ]: RCFGBuilder initialized [2018-06-25 12:29:44,777 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:29:44" (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 [2018-06-25 12:29:44,798 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-25 12:29:44,798 INFO ]: Found specification of procedure gotoProc [2018-06-25 12:29:44,798 INFO ]: Found implementation of procedure gotoProc [2018-06-25 12:29:44,798 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-25 12:29:44,798 INFO ]: Found specification of procedure Ultimate.START [2018-06-25 12:29:44,798 INFO ]: Found implementation of procedure Ultimate.START [2018-06-25 12:29:45,945 INFO ]: Using library mode [2018-06-25 12:29:45,946 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 12:29:45 BoogieIcfgContainer [2018-06-25 12:29:45,946 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-25 12:29:45,949 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-25 12:29:45,949 INFO ]: Initializing TraceAbstraction... [2018-06-25 12:29:45,951 INFO ]: TraceAbstraction initialized [2018-06-25 12:29:45,952 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 12:29:44" (1/3) ... [2018-06-25 12:29:45,952 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@701c714a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 25.06 12:29:45, skipping insertion in model container [2018-06-25 12:29:45,952 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:29:44" (2/3) ... [2018-06-25 12:29:45,953 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@701c714a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.06 12:29:45, skipping insertion in model container [2018-06-25 12:29:45,953 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 12:29:45" (3/3) ... [2018-06-25 12:29:45,954 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-25 12:29:45,964 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-25 12:29:45,973 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-25 12:29:46,024 INFO ]: Using default assertion order modulation [2018-06-25 12:29:46,024 INFO ]: Interprodecural is true [2018-06-25 12:29:46,024 INFO ]: Hoare is false [2018-06-25 12:29:46,024 INFO ]: Compute interpolants for FPandBP [2018-06-25 12:29:46,024 INFO ]: Backedges is TWOTRACK [2018-06-25 12:29:46,024 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-25 12:29:46,024 INFO ]: Difference is false [2018-06-25 12:29:46,024 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-25 12:29:46,025 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-25 12:29:46,039 INFO ]: Start isEmpty. Operand 10 states. [2018-06-25 12:29:46,049 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-25 12:29:46,050 INFO ]: Found error trace [2018-06-25 12:29:46,050 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-25 12:29:46,051 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 12:29:46,056 INFO ]: Analyzing trace with hash 1285054476, now seen corresponding path program 1 times [2018-06-25 12:29:46,058 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 12:29:46,058 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 12:29:46,100 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 12:29:46,100 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 12:29:46,100 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 12:29:46,274 INFO ]: Conjunction of SSA is unsat [2018-06-25 12:29:46,426 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 12:29:46,427 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-25 12:29:46,427 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-25 12:29:46,429 INFO ]: Interpolant automaton has 3 states [2018-06-25 12:29:46,439 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-25 12:29:46,440 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 12:29:46,442 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-25 12:29:46,592 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 12:29:46,592 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-25 12:29:46,593 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-25 12:29:46,594 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-25 12:29:46,594 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 12:29:46,603 INFO ]: With dead ends: 9 [2018-06-25 12:29:46,603 INFO ]: Without dead ends: 9 [2018-06-25 12:29:46,605 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 [2018-06-25 12:29:46,623 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-25 12:29:46,651 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-25 12:29:46,657 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-25 12:29:46,658 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-25 12:29:46,659 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-25 12:29:46,659 INFO ]: Finished accepts. word is rejected. [2018-06-25 12:29:46,659 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-25 12:29:46,659 INFO ]: Interpolant automaton has 3 states. [2018-06-25 12:29:46,659 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-25 12:29:46,659 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-25 12:29:46,659 INFO ]: Found error trace [2018-06-25 12:29:46,660 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 12:29:46,660 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 12:29:46,660 INFO ]: Analyzing trace with hash 1180100628, now seen corresponding path program 1 times [2018-06-25 12:29:46,660 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 12:29:46,660 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 12:29:46,661 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 12:29:46,661 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 12:29:46,661 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 12:29:47,033 INFO ]: Conjunction of SSA is unsat [2018-06-25 12:29:47,456 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 12:29:47,456 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 12:29:47,456 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 [2018-06-25 12:29:47,466 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 12:29:47,876 INFO ]: Conjunction of SSA is unsat [2018-06-25 12:29:47,901 INFO ]: Computing forward predicates... [2018-06-25 12:29:49,345 WARN ]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-25 12:29:49,359 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 12:29:49,381 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 12:29:49,381 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-06-25 12:29:49,382 INFO ]: Interpolant automaton has 6 states [2018-06-25 12:29:49,382 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-25 12:29:49,382 INFO ]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-06-25 12:29:49,382 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 6 states. [2018-06-25 12:29:49,516 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 12:29:49,516 INFO ]: Finished difference Result 10 states and 10 transitions. [2018-06-25 12:29:49,547 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-25 12:29:49,548 INFO ]: Start accepts. Automaton has 6 states. Word has length 8 [2018-06-25 12:29:49,548 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 12:29:49,548 INFO ]: With dead ends: 10 [2018-06-25 12:29:49,548 INFO ]: Without dead ends: 10 [2018-06-25 12:29:49,549 INFO ]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-06-25 12:29:49,549 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-25 12:29:49,549 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-25 12:29:49,550 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-25 12:29:49,550 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-06-25 12:29:49,550 INFO ]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-06-25 12:29:49,550 INFO ]: Finished accepts. word is rejected. [2018-06-25 12:29:49,550 INFO ]: Abstraction has 10 states and 10 transitions. [2018-06-25 12:29:49,550 INFO ]: Interpolant automaton has 6 states. [2018-06-25 12:29:49,550 INFO ]: Start isEmpty. Operand 10 states and 10 transitions. [2018-06-25 12:29:49,550 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-25 12:29:49,550 INFO ]: Found error trace [2018-06-25 12:29:49,550 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 12:29:49,551 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 12:29:49,551 INFO ]: Analyzing trace with hash -2073468660, now seen corresponding path program 2 times [2018-06-25 12:29:49,551 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 12:29:49,551 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 12:29:49,551 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 12:29:49,551 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 12:29:49,551 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 12:29:49,890 INFO ]: Conjunction of SSA is unsat [2018-06-25 12:29:50,658 WARN ]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-06-25 12:29:50,972 WARN ]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-25 12:29:50,973 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 12:29:50,973 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 12:29:50,973 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) [2018-06-25 12:29:50,987 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 12:29:51,420 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-25 12:29:51,420 INFO ]: Conjunction of SSA is unsat [2018-06-25 12:29:51,455 INFO ]: Computing forward predicates... [2018-06-25 12:29:53,105 WARN ]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-25 12:30:03,181 WARN ]: Spent 120.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2018-06-25 12:30:03,202 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 12:30:03,240 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 12:30:03,240 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2018-06-25 12:30:03,241 INFO ]: Interpolant automaton has 8 states [2018-06-25 12:30:03,241 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-25 12:30:03,241 INFO ]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-06-25 12:30:03,241 INFO ]: Start difference. First operand 10 states and 10 transitions. Second operand 8 states. [2018-06-25 12:30:03,418 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 12:30:03,418 INFO ]: Finished difference Result 12 states and 12 transitions. [2018-06-25 12:30:03,418 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-25 12:30:03,418 INFO ]: Start accepts. Automaton has 8 states. Word has length 9 [2018-06-25 12:30:03,418 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 12:30:03,419 INFO ]: With dead ends: 12 [2018-06-25 12:30:03,419 INFO ]: Without dead ends: 12 [2018-06-25 12:30:03,419 INFO ]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2018-06-25 12:30:03,419 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-25 12:30:03,420 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-06-25 12:30:03,420 INFO ]: Start removeUnreachable. Operand 12 states. [2018-06-25 12:30:03,421 INFO ]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-06-25 12:30:03,421 INFO ]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2018-06-25 12:30:03,421 INFO ]: Finished accepts. word is rejected. [2018-06-25 12:30:03,421 INFO ]: Abstraction has 12 states and 12 transitions. [2018-06-25 12:30:03,421 INFO ]: Interpolant automaton has 8 states. [2018-06-25 12:30:03,421 INFO ]: Start isEmpty. Operand 12 states and 12 transitions. [2018-06-25 12:30:03,421 INFO ]: Finished isEmpty. Found accepting run of length 12 [2018-06-25 12:30:03,421 INFO ]: Found error trace [2018-06-25 12:30:03,421 INFO ]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 12:30:03,421 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 12:30:03,421 INFO ]: Analyzing trace with hash 201204236, now seen corresponding path program 3 times [2018-06-25 12:30:03,422 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 12:30:03,422 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 12:30:03,422 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 12:30:03,422 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 12:30:03,422 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 12:30:03,863 INFO ]: Conjunction of SSA is unsat [2018-06-25 12:30:04,677 WARN ]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-06-25 12:30:04,917 WARN ]: Spent 191.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 8 [2018-06-25 12:30:04,992 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 12:30:04,992 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 12:30:04,992 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 [2018-06-25 12:30:05,001 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-25 12:30:05,566 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-25 12:30:05,566 INFO ]: Conjunction of SSA is unsat [2018-06-25 12:30:05,620 INFO ]: Computing forward predicates... Received shutdown request... [2018-06-25 12:30:46,398 INFO ]: Timeout while computing interpolants [2018-06-25 12:30:46,599 WARN ]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 12:30:46,599 WARN ]: Verification canceled [2018-06-25 12:30:46,604 WARN ]: Timeout [2018-06-25 12:30:46,604 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.06 12:30:46 BoogieIcfgContainer [2018-06-25 12:30:46,605 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-25 12:30:46,605 INFO ]: Toolchain (without parser) took 62087.27 ms. Allocated memory was 380.1 MB in the beginning and 1.5 GB in the end (delta: 1.1 GB). Free memory was 308.9 MB in the beginning and 520.6 MB in the end (delta: -211.6 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-25 12:30:46,606 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 303.0 MB. Free memory is still 268.8 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-25 12:30:46,606 INFO ]: ChcToBoogie took 126.54 ms. Allocated memory is still 380.1 MB. Free memory was 308.9 MB in the beginning and 303.4 MB in the end (delta: 5.5 MB). Peak memory consumption was 5.5 MB. Max. memory is 3.6 GB. [2018-06-25 12:30:46,607 INFO ]: Boogie Preprocessor took 126.06 ms. Allocated memory is still 380.1 MB. Free memory was 303.4 MB in the beginning and 300.6 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 3.6 GB. [2018-06-25 12:30:46,607 INFO ]: RCFGBuilder took 1169.25 ms. Allocated memory was 380.1 MB in the beginning and 388.5 MB in the end (delta: 8.4 MB). Free memory was 300.6 MB in the beginning and 214.6 MB in the end (delta: 86.1 MB). Peak memory consumption was 135.0 MB. Max. memory is 3.6 GB. [2018-06-25 12:30:46,608 INFO ]: TraceAbstraction took 60656.06 ms. Allocated memory was 388.5 MB in the beginning and 1.5 GB in the end (delta: 1.1 GB). Free memory was 214.6 MB in the beginning and 520.6 MB in the end (delta: -306.0 MB). Peak memory consumption was 1.2 GB. Max. memory is 3.6 GB. [2018-06-25 12:30:46,621 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 303.0 MB. Free memory is still 268.8 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 126.54 ms. Allocated memory is still 380.1 MB. Free memory was 308.9 MB in the beginning and 303.4 MB in the end (delta: 5.5 MB). Peak memory consumption was 5.5 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 126.06 ms. Allocated memory is still 380.1 MB. Free memory was 303.4 MB in the beginning and 300.6 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 3.6 GB. * RCFGBuilder took 1169.25 ms. Allocated memory was 380.1 MB in the beginning and 388.5 MB in the end (delta: 8.4 MB). Free memory was 300.6 MB in the beginning and 214.6 MB in the end (delta: 86.1 MB). Peak memory consumption was 135.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 60656.06 ms. Allocated memory was 388.5 MB in the beginning and 1.5 GB in the end (delta: 1.1 GB). Free memory was 214.6 MB in the beginning and 520.6 MB in the end (delta: -306.0 MB). Peak memory consumption was 1.2 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 50 quantified variables from 15 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. TIMEOUT Result, 60.5s OverallTime, 4 OverallIterations, 4 TraceHistogramMax, 0.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 21 SDtfs, 2 SDslu, 37 SDs, 0 SdLazy, 18 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.5s 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: 0.3s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 14.9s InterpolantComputationTime, 41 NumberOfCodeBlocks, 41 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 36 ConstructedInterpolants, 0 QuantifiedInterpolants, 1035 SizeOfPredicates, 7 NumberOfNonLiveVariables, 2894 ConjunctsInSsa, 31 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.5.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-25_12-30-46-631.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/token_ring.5.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-25_12-30-46-631.csv Completed graceful shutdown