java -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/chccomp2018/chcToBoogie_automizer.epf -i /storage/chc-comp/vmt-chc-benchmarks/lustre/peterson_2.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-55b8104 [2018-06-18 16:25:27,245 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-18 16:25:27,248 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-18 16:25:27,263 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-18 16:25:27,263 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-18 16:25:27,264 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-18 16:25:27,266 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-18 16:25:27,268 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-18 16:25:27,270 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-18 16:25:27,272 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-18 16:25:27,273 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-18 16:25:27,273 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-18 16:25:27,274 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-18 16:25:27,278 INFO L177 SettingsManager]: ChcToBoogie provides no preferences, ignoring... [2018-06-18 16:25:27,278 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-18 16:25:27,279 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-18 16:25:27,288 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-18 16:25:27,290 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-18 16:25:27,292 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-18 16:25:27,293 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-18 16:25:27,296 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-18 16:25:27,298 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-18 16:25:27,298 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-18 16:25:27,300 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-18 16:25:27,301 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-18 16:25:27,302 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-18 16:25:27,303 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-18 16:25:27,303 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-18 16:25:27,306 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-18 16:25:27,306 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-18 16:25:27,307 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-18 16:25:27,308 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-18 16:25:27,308 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-18 16:25:27,309 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-18 16:25:27,313 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-18 16:25:27,313 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chccomp2018/chcToBoogie_automizer.epf [2018-06-18 16:25:27,334 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-18 16:25:27,335 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-18 16:25:27,335 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-18 16:25:27,335 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-18 16:25:27,340 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-18 16:25:27,340 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-18 16:25:27,340 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-18 16:25:27,341 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-18 16:25:27,341 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-18 16:25:27,341 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-18 16:25:27,341 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-18 16:25:27,341 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-18 16:25:27,341 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-18 16:25:27,342 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-18 16:25:27,342 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-18 16:25:27,342 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-18 16:25:27,342 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-18 16:25:27,344 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-18 16:25:27,344 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-18 16:25:27,399 INFO ]: Repository-Root is: /tmp [2018-06-18 16:25:27,413 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-18 16:25:27,418 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-18 16:25:27,420 INFO ]: Initializing SmtParser... [2018-06-18 16:25:27,421 INFO ]: SmtParser initialized [2018-06-18 16:25:27,421 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/peterson_2.smt2 [2018-06-18 16:25:27,422 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 [2018-06-18 16:25:27,518 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/peterson_2.smt2 unknown [2018-06-18 16:25:28,299 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/peterson_2.smt2 [2018-06-18 16:25:28,304 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-18 16:25:28,309 INFO ]: Walking toolchain with 4 elements. [2018-06-18 16:25:28,310 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-18 16:25:28,310 INFO ]: Initializing ChcToBoogie... [2018-06-18 16:25:28,310 INFO ]: ChcToBoogie initialized [2018-06-18 16:25:28,317 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 04:25:28" (1/1) ... [2018-06-18 16:25:28,430 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:25:28 Unit [2018-06-18 16:25:28,430 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-18 16:25:28,430 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-18 16:25:28,430 INFO ]: Initializing Boogie Preprocessor... [2018-06-18 16:25:28,430 INFO ]: Boogie Preprocessor initialized [2018-06-18 16:25:28,451 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:25:28" (1/1) ... [2018-06-18 16:25:28,451 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:25:28" (1/1) ... [2018-06-18 16:25:28,468 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:25:28" (1/1) ... [2018-06-18 16:25:28,468 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:25:28" (1/1) ... [2018-06-18 16:25:28,482 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:25:28" (1/1) ... [2018-06-18 16:25:28,483 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:25:28" (1/1) ... [2018-06-18 16:25:28,488 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:25:28" (1/1) ... [2018-06-18 16:25:28,495 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-18 16:25:28,499 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-18 16:25:28,499 INFO ]: Initializing RCFGBuilder... [2018-06-18 16:25:28,499 INFO ]: RCFGBuilder initialized [2018-06-18 16:25:28,500 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:25:28" (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) [2018-06-18 16:25:28,513 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-18 16:25:28,513 INFO ]: Found specification of procedure False [2018-06-18 16:25:28,513 INFO ]: Found implementation of procedure False [2018-06-18 16:25:28,513 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-18 16:25:28,513 INFO ]: Found specification of procedure state [2018-06-18 16:25:28,513 INFO ]: Found implementation of procedure state [2018-06-18 16:25:28,513 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-18 16:25:28,513 INFO ]: Found specification of procedure Ultimate.START [2018-06-18 16:25:28,513 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 [2018-06-18 16:25:29,063 INFO ]: Using library mode [2018-06-18 16:25:29,063 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 04:25:29 BoogieIcfgContainer [2018-06-18 16:25:29,063 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-18 16:25:29,064 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-18 16:25:29,064 INFO ]: Initializing TraceAbstraction... [2018-06-18 16:25:29,070 INFO ]: TraceAbstraction initialized [2018-06-18 16:25:29,071 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 04:25:28" (1/3) ... [2018-06-18 16:25:29,072 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2536f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 18.06 04:25:29, skipping insertion in model container [2018-06-18 16:25:29,072 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:25:28" (2/3) ... [2018-06-18 16:25:29,072 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2536f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.06 04:25:29, skipping insertion in model container [2018-06-18 16:25:29,072 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 04:25:29" (3/3) ... [2018-06-18 16:25:29,074 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-18 16:25:29,084 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-18 16:25:29,094 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-18 16:25:29,143 INFO ]: Using default assertion order modulation [2018-06-18 16:25:29,144 INFO ]: Interprodecural is true [2018-06-18 16:25:29,144 INFO ]: Hoare is false [2018-06-18 16:25:29,144 INFO ]: Compute interpolants for FPandBP [2018-06-18 16:25:29,144 INFO ]: Backedges is TWOTRACK [2018-06-18 16:25:29,144 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-18 16:25:29,144 INFO ]: Difference is false [2018-06-18 16:25:29,144 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-18 16:25:29,144 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-18 16:25:29,163 INFO ]: Start isEmpty. Operand 13 states. [2018-06-18 16:25:29,181 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-18 16:25:29,181 INFO ]: Found error trace [2018-06-18 16:25:29,183 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 16:25:29,183 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 16:25:29,189 INFO ]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times [2018-06-18 16:25:29,191 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 16:25:29,191 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 16:25:29,244 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:25:29,244 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 16:25:29,245 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:25:29,403 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:25:29,413 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 16:25:29,754 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-18 16:25:29,757 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-18 16:25:29,757 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-18 16:25:29,759 INFO ]: Interpolant automaton has 4 states [2018-06-18 16:25:29,775 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-18 16:25:29,775 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-18 16:25:29,778 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-18 16:25:29,938 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 16:25:29,938 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-18 16:25:29,939 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-18 16:25:29,940 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-18 16:25:29,941 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 16:25:29,955 INFO ]: With dead ends: 13 [2018-06-18 16:25:29,955 INFO ]: Without dead ends: 13 [2018-06-18 16:25:29,957 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-18 16:25:29,976 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-18 16:25:30,016 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-18 16:25:30,018 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-18 16:25:30,018 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-18 16:25:30,021 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-18 16:25:30,022 INFO ]: Finished accepts. word is rejected. [2018-06-18 16:25:30,022 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-18 16:25:30,022 INFO ]: Interpolant automaton has 4 states. [2018-06-18 16:25:30,022 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-18 16:25:30,023 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-18 16:25:30,023 INFO ]: Found error trace [2018-06-18 16:25:30,023 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 16:25:30,023 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 16:25:30,024 INFO ]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times [2018-06-18 16:25:30,024 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 16:25:30,024 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 16:25:30,025 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:25:30,025 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 16:25:30,025 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:25:30,139 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:25:30,141 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 16:25:31,911 WARN ]: Spent 1.46 s on a formula simplification. DAG size of input: 108 DAG size of output: 69 [2018-06-18 16:25:32,016 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 16:25:32,016 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 16:25:32,016 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 [2018-06-18 16:25:32,027 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 16:25:32,247 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:25:32,262 INFO ]: Computing forward predicates... [2018-06-18 16:25:34,418 WARN ]: expecting exponential blowup for input size 6 [2018-06-18 16:25:34,426 WARN ]: expecting exponential blowup for input size 7 [2018-06-18 16:25:34,431 WARN ]: expecting exponential blowup for input size 7 [2018-06-18 16:25:34,438 WARN ]: expecting exponential blowup for input size 7 [2018-06-18 16:25:34,449 WARN ]: expecting exponential blowup for input size 6 [2018-06-18 16:25:34,458 WARN ]: expecting exponential blowup for input size 6 [2018-06-18 16:25:34,469 WARN ]: expecting exponential blowup for input size 6 [2018-06-18 16:25:34,470 WARN ]: expecting exponential blowup for input size 7 [2018-06-18 16:25:34,489 WARN ]: expecting exponential blowup for input size 7 [2018-06-18 16:25:34,492 WARN ]: expecting exponential blowup for input size 7 [2018-06-18 16:25:34,498 WARN ]: expecting exponential blowup for input size 7 [2018-06-18 16:25:34,500 WARN ]: expecting exponential blowup for input size 6 [2018-06-18 16:25:34,501 WARN ]: expecting exponential blowup for input size 7 [2018-06-18 16:25:34,660 WARN ]: expecting exponential blowup for input size 7 [2018-06-18 16:25:34,671 WARN ]: expecting exponential blowup for input size 7 [2018-06-18 16:25:34,695 WARN ]: expecting exponential blowup for input size 7 [2018-06-18 16:25:34,697 WARN ]: expecting exponential blowup for input size 7 [2018-06-18 16:25:34,701 WARN ]: expecting exponential blowup for input size 7 [2018-06-18 16:25:34,716 WARN ]: expecting exponential blowup for input size 7 [2018-06-18 16:25:34,741 WARN ]: expecting exponential blowup for input size 6 [2018-06-18 16:25:34,742 WARN ]: expecting exponential blowup for input size 7 [2018-06-18 16:25:34,761 WARN ]: expecting exponential blowup for input size 7 [2018-06-18 16:25:34,768 WARN ]: expecting exponential blowup for input size 6 [2018-06-18 16:25:34,776 WARN ]: expecting exponential blowup for input size 7 [2018-06-18 16:25:34,782 WARN ]: expecting exponential blowup for input size 7 [2018-06-18 16:25:34,796 WARN ]: expecting exponential blowup for input size 6 [2018-06-18 16:25:35,103 WARN ]: expecting exponential blowup for input size 6 [2018-06-18 16:25:35,113 WARN ]: expecting exponential blowup for input size 9 [2018-06-18 16:25:35,309 WARN ]: expecting exponential blowup for input size 6 [2018-06-18 16:25:35,310 WARN ]: expecting exponential blowup for input size 6 [2018-06-18 16:25:35,312 WARN ]: expecting exponential blowup for input size 6 [2018-06-18 16:25:35,341 WARN ]: expecting exponential blowup for input size 7 [2018-06-18 16:25:35,344 WARN ]: expecting exponential blowup for input size 7 [2018-06-18 16:25:35,346 WARN ]: expecting exponential blowup for input size 8 [2018-06-18 16:25:35,348 WARN ]: expecting exponential blowup for input size 7 [2018-06-18 16:25:35,359 WARN ]: expecting exponential blowup for input size 7 [2018-06-18 16:25:35,362 WARN ]: expecting exponential blowup for input size 7 [2018-06-18 16:25:35,365 WARN ]: expecting exponential blowup for input size 8 [2018-06-18 16:25:35,367 WARN ]: expecting exponential blowup for input size 7 [2018-06-18 16:25:35,369 WARN ]: expecting exponential blowup for input size 8 [2018-06-18 16:25:35,370 WARN ]: expecting exponential blowup for input size 8 [2018-06-18 16:25:35,387 WARN ]: expecting exponential blowup for input size 6 [2018-06-18 16:25:35,391 WARN ]: expecting exponential blowup for input size 6 [2018-06-18 16:25:35,394 WARN ]: expecting exponential blowup for input size 6 [2018-06-18 16:25:35,396 WARN ]: expecting exponential blowup for input size 7 [2018-06-18 16:25:35,399 WARN ]: expecting exponential blowup for input size 10 [2018-06-18 16:25:35,846 WARN ]: expecting exponential blowup for input size 6 [2018-06-18 16:25:35,847 WARN ]: expecting exponential blowup for input size 6 [2018-06-18 16:25:35,850 WARN ]: expecting exponential blowup for input size 6 [2018-06-18 16:25:35,851 WARN ]: expecting exponential blowup for input size 7 [2018-06-18 16:25:35,903 WARN ]: expecting exponential blowup for input size 6 [2018-06-18 16:25:35,904 WARN ]: expecting exponential blowup for input size 6 [2018-06-18 16:25:35,904 WARN ]: expecting exponential blowup for input size 6 [2018-06-18 16:25:35,905 WARN ]: expecting exponential blowup for input size 7 [2018-06-18 16:25:35,905 WARN ]: expecting exponential blowup for input size 6 [2018-06-18 16:25:35,908 WARN ]: expecting exponential blowup for input size 6 [2018-06-18 16:25:35,909 WARN ]: expecting exponential blowup for input size 7 [2018-06-18 16:25:35,910 WARN ]: expecting exponential blowup for input size 6 [2018-06-18 16:25:35,911 WARN ]: expecting exponential blowup for input size 7 [2018-06-18 16:25:35,911 WARN ]: expecting exponential blowup for input size 7 [2018-06-18 16:26:01,063 WARN ]: Spent 1.09 s on a formula simplification. DAG size of input: 45 DAG size of output: 13 [2018-06-18 16:26:01,174 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 16:26:01,208 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 16:26:01,208 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-06-18 16:26:01,208 INFO ]: Interpolant automaton has 8 states [2018-06-18 16:26:01,209 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-18 16:26:01,209 INFO ]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-06-18 16:26:01,209 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2018-06-18 16:26:01,531 WARN ]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2018-06-18 16:26:01,644 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 16:26:01,644 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-18 16:26:01,645 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-18 16:26:01,645 INFO ]: Start accepts. Automaton has 8 states. Word has length 13 [2018-06-18 16:26:01,645 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 16:26:01,646 INFO ]: With dead ends: 15 [2018-06-18 16:26:01,646 INFO ]: Without dead ends: 15 [2018-06-18 16:26:01,647 INFO ]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-06-18 16:26:01,647 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-18 16:26:01,649 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-18 16:26:01,649 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-18 16:26:01,650 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-18 16:26:01,650 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-18 16:26:01,650 INFO ]: Finished accepts. word is rejected. [2018-06-18 16:26:01,650 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-18 16:26:01,650 INFO ]: Interpolant automaton has 8 states. [2018-06-18 16:26:01,650 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-18 16:26:01,651 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-18 16:26:01,651 INFO ]: Found error trace [2018-06-18 16:26:01,651 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 16:26:01,651 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 16:26:01,651 INFO ]: Analyzing trace with hash -1649658231, now seen corresponding path program 2 times [2018-06-18 16:26:01,651 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 16:26:01,651 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 16:26:01,653 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:26:01,653 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 16:26:01,653 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:26:01,800 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:26:01,801 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 16:26:02,335 WARN ]: Spent 279.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 51 [2018-06-18 16:26:02,741 WARN ]: Spent 395.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 86 [2018-06-18 16:26:02,861 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-18 16:26:02,862 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 16:26:02,862 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 [2018-06-18 16:26:02,878 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-18 16:26:03,128 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-18 16:26:03,128 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:26:03,137 INFO ]: Computing forward predicates... Received shutdown request... [2018-06-18 16:26:33,708 INFO ]: Timeout while computing interpolants [2018-06-18 16:26:33,909 WARN ]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-18 16:26:33,909 WARN ]: Verification canceled [2018-06-18 16:26:33,912 WARN ]: Timeout [2018-06-18 16:26:33,913 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.06 04:26:33 BoogieIcfgContainer [2018-06-18 16:26:33,913 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-18 16:26:33,913 INFO ]: Toolchain (without parser) took 65608.92 ms. Allocated memory was 303.6 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 219.0 MB in the beginning and 750.6 MB in the end (delta: -531.6 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-18 16:26:33,914 INFO ]: SmtParser took 0.06 ms. Allocated memory is still 303.6 MB. Free memory is still 269.0 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-18 16:26:33,914 INFO ]: ChcToBoogie took 120.21 ms. Allocated memory is still 303.6 MB. Free memory was 218.0 MB in the beginning and 211.0 MB in the end (delta: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 3.6 GB. [2018-06-18 16:26:33,914 INFO ]: Boogie Preprocessor took 65.11 ms. Allocated memory is still 303.6 MB. Free memory was 211.0 MB in the beginning and 209.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-18 16:26:33,915 INFO ]: RCFGBuilder took 564.54 ms. Allocated memory was 303.6 MB in the beginning and 324.0 MB in the end (delta: 20.4 MB). Free memory was 209.0 MB in the beginning and 265.3 MB in the end (delta: -56.3 MB). Peak memory consumption was 32.3 MB. Max. memory is 3.6 GB. [2018-06-18 16:26:33,915 INFO ]: TraceAbstraction took 64848.31 ms. Allocated memory was 324.0 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 265.3 MB in the beginning and 750.6 MB in the end (delta: -485.2 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-18 16:26:33,917 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.06 ms. Allocated memory is still 303.6 MB. Free memory is still 269.0 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 120.21 ms. Allocated memory is still 303.6 MB. Free memory was 218.0 MB in the beginning and 211.0 MB in the end (delta: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 65.11 ms. Allocated memory is still 303.6 MB. Free memory was 211.0 MB in the beginning and 209.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 564.54 ms. Allocated memory was 303.6 MB in the beginning and 324.0 MB in the end (delta: 20.4 MB). Free memory was 209.0 MB in the beginning and 265.3 MB in the end (delta: -56.3 MB). Peak memory consumption was 32.3 MB. Max. memory is 3.6 GB. * TraceAbstraction took 64848.31 ms. Allocated memory was 324.0 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 265.3 MB in the beginning and 750.6 MB in the end (delta: -485.2 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [UNKNOWN] : Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 0). Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 3, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 29 quantified variables from 34 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 64.7s OverallTime, 3 OverallIterations, 3 TraceHistogramMax, 0.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 21 SDtfs, 8 SDslu, 45 SDs, 0 SdLazy, 28 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 3.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred in iteration=2, 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 31.1s InterpolantComputationTime, 35 NumberOfCodeBlocks, 35 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 32 ConstructedInterpolants, 0 QuantifiedInterpolants, 2508 SizeOfPredicates, 27 NumberOfNonLiveVariables, 1027 ConjunctsInSsa, 33 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 2/6 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/peterson_2.smt2_chcToBoogie_automizer.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-18_16-26-33-929.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/peterson_2.smt2_chcToBoogie_automizer.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-18_16-26-33-929.csv Completed graceful shutdown