java -Xss1g -Xmx4000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCHC.xml --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_No_Goto.epf -i /storage/chc-comp/vmt-chc-benchmarks/cav12/token_ring.12.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 14:29:34,943 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 14:29:34,944 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 14:29:34,956 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 14:29:34,956 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 14:29:34,957 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 14:29:34,960 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 14:29:34,962 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 14:29:34,964 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 14:29:34,964 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 14:29:34,966 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 14:29:34,966 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 14:29:34,967 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 14:29:34,968 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 14:29:34,969 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 14:29:34,970 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 14:29:34,973 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 14:29:34,986 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 14:29:34,987 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 14:29:34,988 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 14:29:34,989 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 14:29:34,991 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 14:29:34,992 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 14:29:34,992 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 14:29:34,993 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 14:29:34,993 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 14:29:34,994 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 14:29:35,002 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 14:29:35,003 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 14:29:35,003 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 14:29:35,004 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 14:29:35,004 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 14:29:35,004 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 14:29:35,005 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 14:29:35,006 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 14:29:35,006 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_No_Goto.epf [2018-06-22 14:29:35,021 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 14:29:35,021 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 14:29:35,022 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 14:29:35,022 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 14:29:35,023 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 14:29:35,023 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 14:29:35,023 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 14:29:35,023 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 14:29:35,024 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 14:29:35,024 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 14:29:35,024 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 14:29:35,024 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 14:29:35,024 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 14:29:35,025 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 14:29:35,025 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 14:29:35,025 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 14:29:35,025 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 14:29:35,025 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 14:29:35,026 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 14:29:35,027 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 14:29:35,027 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 14:29:35,077 INFO ]: Repository-Root is: /tmp [2018-06-22 14:29:35,092 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 14:29:35,097 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 14:29:35,098 INFO ]: Initializing SmtParser... [2018-06-22 14:29:35,098 INFO ]: SmtParser initialized [2018-06-22 14:29:35,099 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/cav12/token_ring.12.smt2 [2018-06-22 14:29:35,101 INFO ]: Parsing .smt2 file as a set of Horn Clauses No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-06-22 14:29:35,192 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/token_ring.12.smt2 unknown [2018-06-22 14:29:43,367 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/token_ring.12.smt2 [2018-06-22 14:29:43,371 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 14:29:43,381 INFO ]: Walking toolchain with 4 elements. [2018-06-22 14:29:43,381 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 14:29:43,382 INFO ]: Initializing ChcToBoogie... [2018-06-22 14:29:43,382 INFO ]: ChcToBoogie initialized [2018-06-22 14:29:43,385 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:29:43" (1/1) ... [2018-06-22 14:29:43,519 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:29:43 Unit [2018-06-22 14:29:43,519 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 14:29:43,519 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 14:29:43,519 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 14:29:43,519 INFO ]: Boogie Preprocessor initialized [2018-06-22 14:29:43,541 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:29:43" (1/1) ... [2018-06-22 14:29:43,541 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:29:43" (1/1) ... [2018-06-22 14:29:43,624 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:29:43" (1/1) ... [2018-06-22 14:29:43,624 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:29:43" (1/1) ... [2018-06-22 14:29:43,694 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:29:43" (1/1) ... [2018-06-22 14:29:43,695 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:29:43" (1/1) ... [2018-06-22 14:29:43,735 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:29:43" (1/1) ... [2018-06-22 14:29:43,769 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 14:29:43,770 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 14:29:43,770 INFO ]: Initializing RCFGBuilder... [2018-06-22 14:29:43,770 INFO ]: RCFGBuilder initialized [2018-06-22 14:29:43,773 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:29:43" (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 14:29:43,787 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 14:29:43,787 INFO ]: Found specification of procedure False [2018-06-22 14:29:43,787 INFO ]: Found implementation of procedure False [2018-06-22 14:29:43,787 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 14:29:43,787 INFO ]: Found specification of procedure state [2018-06-22 14:29:43,787 INFO ]: Found implementation of procedure state [2018-06-22 14:29:43,787 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 14:29:43,787 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 14:29:43,787 INFO ]: Found implementation of procedure Ultimate.START [2018-06-22 14:29:51,402 INFO ]: Using library mode [2018-06-22 14:29:51,403 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:29:51 BoogieIcfgContainer [2018-06-22 14:29:51,403 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 14:29:51,404 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 14:29:51,404 INFO ]: Initializing TraceAbstraction... [2018-06-22 14:29:51,407 INFO ]: TraceAbstraction initialized [2018-06-22 14:29:51,407 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:29:43" (1/3) ... [2018-06-22 14:29:51,408 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2abddbaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 02:29:51, skipping insertion in model container [2018-06-22 14:29:51,408 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:29:43" (2/3) ... [2018-06-22 14:29:51,408 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2abddbaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 02:29:51, skipping insertion in model container [2018-06-22 14:29:51,408 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:29:51" (3/3) ... [2018-06-22 14:29:51,411 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 14:29:51,420 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 14:29:51,430 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 14:29:51,478 INFO ]: Using default assertion order modulation [2018-06-22 14:29:51,479 INFO ]: Interprodecural is true [2018-06-22 14:29:51,479 INFO ]: Hoare is false [2018-06-22 14:29:51,479 INFO ]: Compute interpolants for FPandBP [2018-06-22 14:29:51,479 INFO ]: Backedges is TWOTRACK [2018-06-22 14:29:51,479 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 14:29:51,479 INFO ]: Difference is false [2018-06-22 14:29:51,479 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 14:29:51,479 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 14:29:51,495 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 14:29:51,511 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 14:29:51,511 INFO ]: Found error trace [2018-06-22 14:29:51,512 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:29:51,512 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:29:51,519 INFO ]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times [2018-06-22 14:29:51,521 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:29:51,521 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:29:51,559 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:29:51,559 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:29:51,559 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:29:51,747 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:29:52,073 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 14:29:52,075 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 14:29:52,076 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 14:29:52,077 INFO ]: Interpolant automaton has 4 states [2018-06-22 14:29:52,092 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 14:29:52,093 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 14:29:52,096 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 14:29:52,625 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:29:52,625 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 14:29:52,627 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 14:29:52,628 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 14:29:52,629 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:29:52,643 INFO ]: With dead ends: 13 [2018-06-22 14:29:52,643 INFO ]: Without dead ends: 13 [2018-06-22 14:29:52,645 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 14:29:52,663 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 14:29:52,698 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 14:29:52,699 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 14:29:52,700 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 14:29:52,701 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 14:29:52,701 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:29:52,701 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 14:29:52,701 INFO ]: Interpolant automaton has 4 states. [2018-06-22 14:29:52,701 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 14:29:52,703 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 14:29:52,703 INFO ]: Found error trace [2018-06-22 14:29:52,703 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:29:52,703 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:29:52,703 INFO ]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times [2018-06-22 14:29:52,703 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:29:52,703 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:29:52,704 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:29:52,704 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:29:52,704 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:29:53,700 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:29:55,415 WARN ]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-06-22 14:29:55,663 WARN ]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-06-22 14:29:56,042 WARN ]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-06-22 14:29:56,044 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:29:56,045 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:29:56,045 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:29:56,062 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:29:56,791 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:29:56,858 INFO ]: Computing forward predicates... [2018-06-22 14:29:57,072 WARN ]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2018-06-22 14:30:03,940 WARN ]: Spent 296.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 26 [2018-06-22 14:30:04,146 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:30:04,175 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:30:04,175 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2018-06-22 14:30:04,175 INFO ]: Interpolant automaton has 10 states [2018-06-22 14:30:04,176 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-22 14:30:04,176 INFO ]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2018-06-22 14:30:04,176 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 10 states. [2018-06-22 14:30:04,662 WARN ]: Spent 188.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2018-06-22 14:30:04,882 WARN ]: Spent 138.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2018-06-22 14:30:04,993 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:30:04,994 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 14:30:04,995 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 14:30:04,995 INFO ]: Start accepts. Automaton has 10 states. Word has length 13 [2018-06-22 14:30:04,995 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:30:04,996 INFO ]: With dead ends: 15 [2018-06-22 14:30:04,996 INFO ]: Without dead ends: 15 [2018-06-22 14:30:04,996 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2018-06-22 14:30:04,997 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 14:30:04,999 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 14:30:04,999 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 14:30:05,000 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 14:30:05,000 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 14:30:05,000 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:30:05,000 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 14:30:05,000 INFO ]: Interpolant automaton has 10 states. [2018-06-22 14:30:05,000 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 14:30:05,000 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 14:30:05,000 INFO ]: Found error trace [2018-06-22 14:30:05,001 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:30:05,001 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:30:05,001 INFO ]: Analyzing trace with hash -1649658231, now seen corresponding path program 2 times [2018-06-22 14:30:05,001 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:30:05,001 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:30:05,002 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:30:05,002 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:30:05,002 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:30:06,360 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:30:08,048 WARN ]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-06-22 14:30:08,287 WARN ]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-06-22 14:30:08,338 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 14:30:08,339 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:30:08,339 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:30:08,347 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 14:30:09,503 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 14:30:09,503 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:30:09,607 INFO ]: Computing forward predicates... [2018-06-22 14:30:14,088 WARN ]: Spent 177.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 25 [2018-06-22 14:30:17,797 WARN ]: Spent 1.05 s on a formula simplification. DAG size of input: 76 DAG size of output: 44 [2018-06-22 14:30:18,018 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 14:30:18,065 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:30:18,065 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2018-06-22 14:30:18,065 INFO ]: Interpolant automaton has 13 states [2018-06-22 14:30:18,065 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-22 14:30:18,065 INFO ]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2018-06-22 14:30:18,066 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 13 states. [2018-06-22 14:30:19,862 WARN ]: Spent 1.24 s on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2018-06-22 14:30:20,067 WARN ]: Spent 121.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 32 [2018-06-22 14:30:20,498 WARN ]: Spent 352.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2018-06-22 14:30:20,609 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:30:20,609 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 14:30:20,610 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 14:30:20,610 INFO ]: Start accepts. Automaton has 13 states. Word has length 17 [2018-06-22 14:30:20,610 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:30:20,610 INFO ]: With dead ends: 17 [2018-06-22 14:30:20,610 INFO ]: Without dead ends: 17 [2018-06-22 14:30:20,611 INFO ]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2018-06-22 14:30:20,611 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 14:30:20,613 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 14:30:20,613 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 14:30:20,614 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 14:30:20,614 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 14:30:20,614 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:30:20,614 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 14:30:20,614 INFO ]: Interpolant automaton has 13 states. [2018-06-22 14:30:20,614 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 14:30:20,615 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 14:30:20,615 INFO ]: Found error trace [2018-06-22 14:30:20,615 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:30:20,615 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:30:20,615 INFO ]: Analyzing trace with hash 2119922091, now seen corresponding path program 3 times [2018-06-22 14:30:20,615 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:30:20,615 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:30:20,616 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:30:20,616 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:30:20,616 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:30:22,053 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:30:24,056 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 14:30:24,056 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:30:24,056 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:30:24,063 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 14:30:25,505 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 14:30:25,505 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:30:25,644 INFO ]: Computing forward predicates... Received shutdown request... [2018-06-22 14:30:26,021 INFO ]: Timeout while computing interpolants [2018-06-22 14:30:26,222 WARN ]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:30:26,222 WARN ]: Verification canceled [2018-06-22 14:30:26,227 WARN ]: Timeout [2018-06-22 14:30:26,227 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 02:30:26 BoogieIcfgContainer [2018-06-22 14:30:26,227 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 14:30:26,228 INFO ]: Toolchain (without parser) took 42855.98 ms. Allocated memory was 1.1 GB in the beginning and 1.6 GB in the end (delta: 506.5 MB). Free memory was 616.8 MB in the beginning and 1.3 GB in the end (delta: -642.9 MB). Peak memory consumption was 960.9 MB. Max. memory is 3.6 GB. [2018-06-22 14:30:26,228 INFO ]: SmtParser took 0.08 ms. Allocated memory is still 308.3 MB. Free memory is still 273.8 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 14:30:26,228 INFO ]: ChcToBoogie took 137.48 ms. Allocated memory is still 1.1 GB. Free memory is still 616.8 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 14:30:26,229 INFO ]: Boogie Preprocessor took 249.95 ms. Allocated memory is still 1.1 GB. Free memory was 616.8 MB in the beginning and 599.3 MB in the end (delta: 17.5 MB). Peak memory consumption was 17.5 MB. Max. memory is 3.6 GB. [2018-06-22 14:30:26,229 INFO ]: RCFGBuilder took 7633.05 ms. Allocated memory was 1.1 GB in the beginning and 1.7 GB in the end (delta: 537.9 MB). Free memory was 599.3 MB in the beginning and 403.3 MB in the end (delta: 195.9 MB). Peak memory consumption was 924.7 MB. Max. memory is 3.6 GB. [2018-06-22 14:30:26,229 INFO ]: TraceAbstraction took 34822.81 ms. Allocated memory was 1.7 GB in the beginning and 1.6 GB in the end (delta: -31.5 MB). Free memory was 403.3 MB in the beginning and 1.3 GB in the end (delta: -856.4 MB). Peak memory consumption was 209.6 MB. Max. memory is 3.6 GB. [2018-06-22 14:30:26,231 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 308.3 MB. Free memory is still 273.8 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 137.48 ms. Allocated memory is still 1.1 GB. Free memory is still 616.8 MB. There was no memory consumed. Max. memory is 3.6 GB. * Boogie Preprocessor took 249.95 ms. Allocated memory is still 1.1 GB. Free memory was 616.8 MB in the beginning and 599.3 MB in the end (delta: 17.5 MB). Peak memory consumption was 17.5 MB. Max. memory is 3.6 GB. * RCFGBuilder took 7633.05 ms. Allocated memory was 1.1 GB in the beginning and 1.7 GB in the end (delta: 537.9 MB). Free memory was 599.3 MB in the beginning and 403.3 MB in the end (delta: 195.9 MB). Peak memory consumption was 924.7 MB. Max. memory is 3.6 GB. * TraceAbstraction took 34822.81 ms. Allocated memory was 1.7 GB in the beginning and 1.6 GB in the end (delta: -31.5 MB). Free memory was 403.3 MB in the beginning and 1.3 GB in the end (delta: -856.4 MB). Peak memory consumption was 209.6 MB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [UNKNOWN] : Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 0). Cancelled while BasicCegarLoop was analyzing trace of length 22 with TraceHistMax 4, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 91 quantified variables from 25 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 34.7s OverallTime, 4 OverallIterations, 4 TraceHistogramMax, 3.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 33 SDtfs, 22 SDslu, 93 SDs, 0 SdLazy, 63 SolverSat, 29 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 5.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.7s SsaConstructionTime, 3.7s SatisfiabilityAnalysisTime, 20.5s InterpolantComputationTime, 69 NumberOfCodeBlocks, 69 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 64 ConstructedInterpolants, 0 QuantifiedInterpolants, 11240 SizeOfPredicates, 4459 NumberOfNonLiveVariables, 7003 ConjunctsInSsa, 37 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 8/26 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/token_ring.12.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_14-30-26-241.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/token_ring.12.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_14-30-26-241.csv Completed graceful shutdown