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.13.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 04:49:25,270 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 04:49:25,273 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 04:49:25,286 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 04:49:25,286 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 04:49:25,287 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 04:49:25,288 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 04:49:25,292 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 04:49:25,293 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 04:49:25,295 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 04:49:25,296 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 04:49:25,296 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 04:49:25,297 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 04:49:25,298 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 04:49:25,298 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 04:49:25,302 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 04:49:25,303 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 04:49:25,312 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 04:49:25,314 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 04:49:25,315 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 04:49:25,316 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 04:49:25,321 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 04:49:25,322 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 04:49:25,322 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 04:49:25,322 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 04:49:25,323 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 04:49:25,326 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 04:49:25,327 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 04:49:25,327 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 04:49:25,328 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 04:49:25,328 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 04:49:25,332 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 04:49:25,332 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 04:49:25,333 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 04:49:25,333 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 04:49:25,333 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 04:49:25,354 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 04:49:25,354 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 04:49:25,355 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 04:49:25,355 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 04:49:25,356 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 04:49:25,356 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 04:49:25,356 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 04:49:25,356 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 04:49:25,357 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 04:49:25,357 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 04:49:25,357 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 04:49:25,357 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 04:49:25,357 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 04:49:25,357 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 04:49:25,358 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 04:49:25,358 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 04:49:25,358 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 04:49:25,360 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 04:49:25,361 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 04:49:25,404 INFO ]: Repository-Root is: /tmp [2018-06-22 04:49:25,418 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 04:49:25,422 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 04:49:25,424 INFO ]: Initializing SmtParser... [2018-06-22 04:49:25,424 INFO ]: SmtParser initialized [2018-06-22 04:49:25,424 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/cav12/token_ring.13.smt2 [2018-06-22 04:49:25,426 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 04:49:25,510 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/token_ring.13.smt2 unknown [2018-06-22 04:49:35,106 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/token_ring.13.smt2 [2018-06-22 04:49:35,111 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 04:49:35,116 INFO ]: Walking toolchain with 4 elements. [2018-06-22 04:49:35,116 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 04:49:35,116 INFO ]: Initializing ChcToBoogie... [2018-06-22 04:49:35,116 INFO ]: ChcToBoogie initialized [2018-06-22 04:49:35,119 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 04:49:35" (1/1) ... [2018-06-22 04:49:35,302 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:49:35 Unit [2018-06-22 04:49:35,302 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 04:49:35,302 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 04:49:35,302 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 04:49:35,302 INFO ]: Boogie Preprocessor initialized [2018-06-22 04:49:35,323 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:49:35" (1/1) ... [2018-06-22 04:49:35,323 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:49:35" (1/1) ... [2018-06-22 04:49:35,436 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:49:35" (1/1) ... [2018-06-22 04:49:35,436 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:49:35" (1/1) ... [2018-06-22 04:49:35,527 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:49:35" (1/1) ... [2018-06-22 04:49:35,529 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:49:35" (1/1) ... [2018-06-22 04:49:35,567 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:49:35" (1/1) ... [2018-06-22 04:49:35,606 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 04:49:35,607 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 04:49:35,607 INFO ]: Initializing RCFGBuilder... [2018-06-22 04:49:35,607 INFO ]: RCFGBuilder initialized [2018-06-22 04:49:35,608 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:49:35" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2018-06-22 04:49:35,626 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 04:49:35,626 INFO ]: Found specification of procedure gotoProc [2018-06-22 04:49:35,626 INFO ]: Found implementation of procedure gotoProc [2018-06-22 04:49:35,626 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 04:49:35,626 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 04:49:35,626 INFO ]: Found implementation of procedure Ultimate.START Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 04:49:43,898 INFO ]: Using library mode [2018-06-22 04:49:43,898 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 04:49:43 BoogieIcfgContainer [2018-06-22 04:49:43,898 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 04:49:43,899 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 04:49:43,899 INFO ]: Initializing TraceAbstraction... [2018-06-22 04:49:43,902 INFO ]: TraceAbstraction initialized [2018-06-22 04:49:43,903 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 04:49:35" (1/3) ... [2018-06-22 04:49:43,903 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bdc90a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 04:49:43, skipping insertion in model container [2018-06-22 04:49:43,903 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:49:35" (2/3) ... [2018-06-22 04:49:43,904 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bdc90a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 04:49:43, skipping insertion in model container [2018-06-22 04:49:43,904 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 04:49:43" (3/3) ... [2018-06-22 04:49:43,905 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 04:49:43,914 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 04:49:43,923 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 04:49:43,980 INFO ]: Using default assertion order modulation [2018-06-22 04:49:43,980 INFO ]: Interprodecural is true [2018-06-22 04:49:43,980 INFO ]: Hoare is false [2018-06-22 04:49:43,980 INFO ]: Compute interpolants for FPandBP [2018-06-22 04:49:43,980 INFO ]: Backedges is TWOTRACK [2018-06-22 04:49:43,980 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 04:49:43,980 INFO ]: Difference is false [2018-06-22 04:49:43,980 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 04:49:43,980 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 04:49:44,002 INFO ]: Start isEmpty. Operand 10 states. [2018-06-22 04:49:44,016 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-22 04:49:44,016 INFO ]: Found error trace [2018-06-22 04:49:44,017 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-22 04:49:44,017 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 04:49:44,023 INFO ]: Analyzing trace with hash 1284994894, now seen corresponding path program 1 times [2018-06-22 04:49:44,025 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 04:49:44,025 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 04:49:44,074 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:49:44,075 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 04:49:44,075 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:49:44,433 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:49:44,665 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:49:44,669 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 04:49:44,669 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 04:49:44,670 INFO ]: Interpolant automaton has 3 states [2018-06-22 04:49:44,685 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 04:49:44,686 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 04:49:44,689 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-22 04:49:45,115 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 04:49:45,115 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-22 04:49:45,145 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 04:49:45,146 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-22 04:49:45,146 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 04:49:45,152 INFO ]: With dead ends: 9 [2018-06-22 04:49:45,152 INFO ]: Without dead ends: 9 [2018-06-22 04:49:45,154 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 04:49:45,166 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-22 04:49:45,181 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-22 04:49:45,182 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-22 04:49:45,182 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-22 04:49:45,183 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-22 04:49:45,183 INFO ]: Finished accepts. word is rejected. [2018-06-22 04:49:45,184 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-22 04:49:45,184 INFO ]: Interpolant automaton has 3 states. [2018-06-22 04:49:45,184 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-22 04:49:45,184 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 04:49:45,184 INFO ]: Found error trace [2018-06-22 04:49:45,184 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 04:49:45,184 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 04:49:45,184 INFO ]: Analyzing trace with hash 1180964567, now seen corresponding path program 1 times [2018-06-22 04:49:45,184 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 04:49:45,184 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 04:49:45,185 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:49:45,185 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 04:49:45,185 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:49:46,253 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:49:47,968 WARN ]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2018-06-22 04:49:48,032 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:49:48,032 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 04:49:48,032 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 04:49:48,042 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 04:49:49,116 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:49:49,217 INFO ]: Computing forward predicates... [2018-06-22 04:49:49,542 WARN ]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-06-22 04:49:51,959 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:49:52,005 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 04:49:52,006 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-06-22 04:49:52,006 INFO ]: Interpolant automaton has 6 states [2018-06-22 04:49:52,006 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 04:49:52,006 INFO ]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-06-22 04:49:52,007 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 6 states. [2018-06-22 04:49:52,676 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 04:49:52,676 INFO ]: Finished difference Result 10 states and 10 transitions. [2018-06-22 04:49:52,676 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 04:49:52,676 INFO ]: Start accepts. Automaton has 6 states. Word has length 8 [2018-06-22 04:49:52,676 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 04:49:52,676 INFO ]: With dead ends: 10 [2018-06-22 04:49:52,676 INFO ]: Without dead ends: 10 [2018-06-22 04:49:52,677 INFO ]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2018-06-22 04:49:52,677 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-22 04:49:52,678 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-22 04:49:52,678 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-22 04:49:52,678 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-06-22 04:49:52,678 INFO ]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-06-22 04:49:52,678 INFO ]: Finished accepts. word is rejected. [2018-06-22 04:49:52,678 INFO ]: Abstraction has 10 states and 10 transitions. [2018-06-22 04:49:52,678 INFO ]: Interpolant automaton has 6 states. [2018-06-22 04:49:52,678 INFO ]: Start isEmpty. Operand 10 states and 10 transitions. [2018-06-22 04:49:52,679 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 04:49:52,679 INFO ]: Found error trace [2018-06-22 04:49:52,679 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 04:49:52,679 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 04:49:52,679 INFO ]: Analyzing trace with hash -2043975570, now seen corresponding path program 2 times [2018-06-22 04:49:52,679 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 04:49:52,679 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 04:49:52,680 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:49:52,680 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 04:49:52,680 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:49:53,948 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:49:56,020 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:49:56,020 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 04:49:56,020 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 04:49:56,026 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 04:49:57,767 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 04:49:57,767 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:49:57,906 INFO ]: Computing forward predicates... [2018-06-22 04:50:06,227 WARN ]: Spent 224.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 22 [2018-06-22 04:50:06,233 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:50:06,266 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 04:50:06,266 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2018-06-22 04:50:06,266 INFO ]: Interpolant automaton has 8 states [2018-06-22 04:50:06,266 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 04:50:06,266 INFO ]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-06-22 04:50:06,266 INFO ]: Start difference. First operand 10 states and 10 transitions. Second operand 8 states. [2018-06-22 04:50:06,904 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 04:50:06,904 INFO ]: Finished difference Result 12 states and 12 transitions. [2018-06-22 04:50:06,904 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 04:50:06,904 INFO ]: Start accepts. Automaton has 8 states. Word has length 9 [2018-06-22 04:50:06,904 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 04:50:06,905 INFO ]: With dead ends: 12 [2018-06-22 04:50:06,905 INFO ]: Without dead ends: 12 [2018-06-22 04:50:06,905 INFO ]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2018-06-22 04:50:06,905 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-22 04:50:06,907 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-06-22 04:50:06,907 INFO ]: Start removeUnreachable. Operand 12 states. [2018-06-22 04:50:06,907 INFO ]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-06-22 04:50:06,907 INFO ]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2018-06-22 04:50:06,907 INFO ]: Finished accepts. word is rejected. [2018-06-22 04:50:06,907 INFO ]: Abstraction has 12 states and 12 transitions. [2018-06-22 04:50:06,907 INFO ]: Interpolant automaton has 8 states. [2018-06-22 04:50:06,907 INFO ]: Start isEmpty. Operand 12 states and 12 transitions. [2018-06-22 04:50:06,908 INFO ]: Finished isEmpty. Found accepting run of length 12 [2018-06-22 04:50:06,908 INFO ]: Found error trace [2018-06-22 04:50:06,908 INFO ]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 04:50:06,908 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 04:50:06,908 INFO ]: Analyzing trace with hash -1433955954, now seen corresponding path program 3 times [2018-06-22 04:50:06,908 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 04:50:06,908 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 04:50:06,909 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:50:06,909 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 04:50:06,909 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:50:08,811 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:50:16,068 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:50:16,068 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 04:50:16,068 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 04:50:16,080 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Received shutdown request... [2018-06-22 04:50:18,612 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-22 04:50:18,612 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:50:18,824 INFO ]: Computing forward predicates... [2018-06-22 04:50:18,826 INFO ]: Timeout while computing interpolants [2018-06-22 04:50:19,027 WARN ]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 04:50:19,027 WARN ]: Verification canceled [2018-06-22 04:50:19,032 WARN ]: Timeout [2018-06-22 04:50:19,032 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 04:50:19 BoogieIcfgContainer [2018-06-22 04:50:19,032 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 04:50:19,033 INFO ]: Toolchain (without parser) took 43921.95 ms. Allocated memory was 1.3 GB in the beginning and 1.9 GB in the end (delta: 567.3 MB). Free memory was 546.3 MB in the beginning and 571.7 MB in the end (delta: -25.3 MB). Peak memory consumption was 542.0 MB. Max. memory is 3.6 GB. [2018-06-22 04:50:19,034 INFO ]: SmtParser took 0.08 ms. Allocated memory is still 309.9 MB. Free memory is still 274.3 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 04:50:19,034 INFO ]: ChcToBoogie took 185.69 ms. Allocated memory is still 1.3 GB. Free memory is still 546.3 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 04:50:19,034 INFO ]: Boogie Preprocessor took 304.23 ms. Allocated memory is still 1.3 GB. Free memory was 546.3 MB in the beginning and 504.7 MB in the end (delta: 41.7 MB). Peak memory consumption was 41.7 MB. Max. memory is 3.6 GB. [2018-06-22 04:50:19,034 INFO ]: RCFGBuilder took 8291.41 ms. Allocated memory was 1.3 GB in the beginning and 1.6 GB in the end (delta: 298.3 MB). Free memory was 504.7 MB in the beginning and 1.1 GB in the end (delta: -638.6 MB). Peak memory consumption was 671.3 MB. Max. memory is 3.6 GB. [2018-06-22 04:50:19,035 INFO ]: TraceAbstraction took 35132.72 ms. Allocated memory was 1.6 GB in the beginning and 1.9 GB in the end (delta: 269.0 MB). Free memory was 1.1 GB in the beginning and 571.7 MB in the end (delta: 571.6 MB). Peak memory consumption was 840.5 MB. Max. memory is 3.6 GB. [2018-06-22 04:50:19,036 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 309.9 MB. Free memory is still 274.3 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 185.69 ms. Allocated memory is still 1.3 GB. Free memory is still 546.3 MB. There was no memory consumed. Max. memory is 3.6 GB. * Boogie Preprocessor took 304.23 ms. Allocated memory is still 1.3 GB. Free memory was 546.3 MB in the beginning and 504.7 MB in the end (delta: 41.7 MB). Peak memory consumption was 41.7 MB. Max. memory is 3.6 GB. * RCFGBuilder took 8291.41 ms. Allocated memory was 1.3 GB in the beginning and 1.6 GB in the end (delta: 298.3 MB). Free memory was 504.7 MB in the beginning and 1.1 GB in the end (delta: -638.6 MB). Peak memory consumption was 671.3 MB. Max. memory is 3.6 GB. * TraceAbstraction took 35132.72 ms. Allocated memory was 1.6 GB in the beginning and 1.9 GB in the end (delta: 269.0 MB). Free memory was 1.1 GB in the beginning and 571.7 MB in the end (delta: 571.6 MB). Peak memory consumption was 840.5 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 12 with TraceHistMax 4, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 1 quantified variables from 2 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. TIMEOUT Result, 35.0s OverallTime, 4 OverallIterations, 4 TraceHistogramMax, 1.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 21 SDtfs, 0 SDslu, 40 SDs, 0 SdLazy, 21 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.0s SsaConstructionTime, 4.4s SatisfiabilityAnalysisTime, 15.3s InterpolantComputationTime, 41 NumberOfCodeBlocks, 41 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 36 ConstructedInterpolants, 0 QuantifiedInterpolants, 986 SizeOfPredicates, 6 NumberOfNonLiveVariables, 11081 ConjunctsInSsa, 42 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 0/8 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/token_ring.13.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_04-50-19-045.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/token_ring.13.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_04-50-19-045.csv Completed graceful shutdown