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/lustre/peterson_1.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 19:35:13,306 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 19:35:13,308 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 19:35:13,322 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 19:35:13,322 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 19:35:13,323 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 19:35:13,326 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 19:35:13,328 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 19:35:13,329 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 19:35:13,331 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 19:35:13,332 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 19:35:13,332 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 19:35:13,333 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 19:35:13,334 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 19:35:13,337 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 19:35:13,337 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 19:35:13,339 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 19:35:13,348 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 19:35:13,349 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 19:35:13,350 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 19:35:13,351 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 19:35:13,356 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 19:35:13,356 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 19:35:13,356 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 19:35:13,357 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 19:35:13,358 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 19:35:13,360 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 19:35:13,361 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 19:35:13,362 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 19:35:13,362 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 19:35:13,362 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 19:35:13,365 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 19:35:13,366 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 19:35:13,366 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 19:35:13,367 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 19:35:13,367 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 19:35:13,388 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 19:35:13,388 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 19:35:13,388 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 19:35:13,388 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 19:35:13,389 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 19:35:13,389 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 19:35:13,390 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 19:35:13,390 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 19:35:13,390 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 19:35:13,390 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 19:35:13,390 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 19:35:13,391 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 19:35:13,391 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 19:35:13,391 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 19:35:13,392 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 19:35:13,392 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 19:35:13,392 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 19:35:13,392 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 19:35:13,392 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 19:35:13,394 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 19:35:13,394 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 19:35:13,441 INFO ]: Repository-Root is: /tmp [2018-06-22 19:35:13,452 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 19:35:13,459 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 19:35:13,460 INFO ]: Initializing SmtParser... [2018-06-22 19:35:13,460 INFO ]: SmtParser initialized [2018-06-22 19:35:13,461 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/peterson_1.smt2 [2018-06-22 19:35:13,463 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 19:35:13,556 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/peterson_1.smt2 unknown [2018-06-22 19:35:14,174 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/peterson_1.smt2 [2018-06-22 19:35:14,178 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 19:35:14,185 INFO ]: Walking toolchain with 4 elements. [2018-06-22 19:35:14,185 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 19:35:14,185 INFO ]: Initializing ChcToBoogie... [2018-06-22 19:35:14,185 INFO ]: ChcToBoogie initialized [2018-06-22 19:35:14,188 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 07:35:14" (1/1) ... [2018-06-22 19:35:14,272 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:35:14 Unit [2018-06-22 19:35:14,272 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 19:35:14,273 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 19:35:14,273 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 19:35:14,273 INFO ]: Boogie Preprocessor initialized [2018-06-22 19:35:14,314 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:35:14" (1/1) ... [2018-06-22 19:35:14,314 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:35:14" (1/1) ... [2018-06-22 19:35:14,346 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:35:14" (1/1) ... [2018-06-22 19:35:14,346 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:35:14" (1/1) ... [2018-06-22 19:35:14,366 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:35:14" (1/1) ... [2018-06-22 19:35:14,368 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:35:14" (1/1) ... [2018-06-22 19:35:14,381 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:35:14" (1/1) ... [2018-06-22 19:35:14,386 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 19:35:14,387 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 19:35:14,387 INFO ]: Initializing RCFGBuilder... [2018-06-22 19:35:14,387 INFO ]: RCFGBuilder initialized [2018-06-22 19:35:14,388 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:35:14" (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 19:35:14,413 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 19:35:14,413 INFO ]: Found specification of procedure False [2018-06-22 19:35:14,414 INFO ]: Found implementation of procedure False [2018-06-22 19:35:14,414 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 19:35:14,414 INFO ]: Found specification of procedure state [2018-06-22 19:35:14,414 INFO ]: Found implementation of procedure state [2018-06-22 19:35:14,414 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 19:35:14,414 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 19:35:14,414 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 19:35:15,013 INFO ]: Using library mode [2018-06-22 19:35:15,014 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 07:35:15 BoogieIcfgContainer [2018-06-22 19:35:15,014 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 19:35:15,015 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 19:35:15,015 INFO ]: Initializing TraceAbstraction... [2018-06-22 19:35:15,020 INFO ]: TraceAbstraction initialized [2018-06-22 19:35:15,021 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 07:35:14" (1/3) ... [2018-06-22 19:35:15,021 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63b388aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 07:35:15, skipping insertion in model container [2018-06-22 19:35:15,021 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:35:14" (2/3) ... [2018-06-22 19:35:15,022 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63b388aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 07:35:15, skipping insertion in model container [2018-06-22 19:35:15,022 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 07:35:15" (3/3) ... [2018-06-22 19:35:15,024 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 19:35:15,034 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 19:35:15,044 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 19:35:15,093 INFO ]: Using default assertion order modulation [2018-06-22 19:35:15,094 INFO ]: Interprodecural is true [2018-06-22 19:35:15,094 INFO ]: Hoare is false [2018-06-22 19:35:15,094 INFO ]: Compute interpolants for FPandBP [2018-06-22 19:35:15,094 INFO ]: Backedges is TWOTRACK [2018-06-22 19:35:15,094 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 19:35:15,094 INFO ]: Difference is false [2018-06-22 19:35:15,094 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 19:35:15,094 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 19:35:15,106 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 19:35:15,117 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 19:35:15,117 INFO ]: Found error trace [2018-06-22 19:35:15,118 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:35:15,118 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:35:15,123 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-22 19:35:15,125 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:35:15,125 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:35:15,162 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:35:15,162 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:35:15,162 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:35:15,310 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:35:15,556 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 19:35:15,558 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 19:35:15,558 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 19:35:15,560 INFO ]: Interpolant automaton has 4 states [2018-06-22 19:35:15,575 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 19:35:15,576 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 19:35:15,579 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 19:35:15,760 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:35:15,760 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 19:35:15,761 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 19:35:15,763 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 19:35:15,763 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:35:15,779 INFO ]: With dead ends: 13 [2018-06-22 19:35:15,779 INFO ]: Without dead ends: 13 [2018-06-22 19:35:15,782 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 19:35:15,800 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 19:35:15,839 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 19:35:15,840 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 19:35:15,841 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 19:35:15,842 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 19:35:15,842 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:35:15,842 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 19:35:15,842 INFO ]: Interpolant automaton has 4 states. [2018-06-22 19:35:15,842 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 19:35:15,843 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 19:35:15,843 INFO ]: Found error trace [2018-06-22 19:35:15,843 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:35:15,843 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:35:15,843 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-22 19:35:15,843 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:35:15,843 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:35:15,844 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:35:15,844 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:35:15,844 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:35:15,955 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:35:17,312 WARN ]: Spent 1.05 s on a formula simplification. DAG size of input: 82 DAG size of output: 49 [2018-06-22 19:35:17,343 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 19:35:17,344 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:35:17,344 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 19:35:17,351 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:35:17,588 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:35:17,600 INFO ]: Computing forward predicates... [2018-06-22 19:35:18,940 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 19:35:18,975 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:35:18,975 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-06-22 19:35:18,976 INFO ]: Interpolant automaton has 8 states [2018-06-22 19:35:18,976 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 19:35:18,976 INFO ]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-06-22 19:35:18,976 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2018-06-22 19:35:19,391 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:35:19,391 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 19:35:19,392 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 19:35:19,392 INFO ]: Start accepts. Automaton has 8 states. Word has length 13 [2018-06-22 19:35:19,392 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:35:19,392 INFO ]: With dead ends: 15 [2018-06-22 19:35:19,393 INFO ]: Without dead ends: 15 [2018-06-22 19:35:19,393 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-06-22 19:35:19,393 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 19:35:19,396 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 19:35:19,396 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 19:35:19,396 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 19:35:19,396 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 19:35:19,397 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:35:19,397 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 19:35:19,397 INFO ]: Interpolant automaton has 8 states. [2018-06-22 19:35:19,397 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 19:35:19,397 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 19:35:19,397 INFO ]: Found error trace [2018-06-22 19:35:19,397 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:35:19,397 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:35:19,397 INFO ]: Analyzing trace with hash -1486246934, now seen corresponding path program 2 times [2018-06-22 19:35:19,397 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:35:19,397 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:35:19,398 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:35:19,398 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:35:19,398 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:35:19,528 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:35:20,171 WARN ]: Spent 250.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 77 [2018-06-22 19:35:20,311 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 19:35:20,311 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:35:20,311 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 19:35:20,319 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 19:35:20,579 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 19:35:20,579 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:35:20,591 INFO ]: Computing forward predicates... Received shutdown request... [2018-06-22 19:36:25,173 INFO ]: Timeout while computing interpolants [2018-06-22 19:36:25,373 WARN ]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 19:36:25,374 WARN ]: Verification canceled [2018-06-22 19:36:25,392 WARN ]: Timeout [2018-06-22 19:36:25,392 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 07:36:25 BoogieIcfgContainer [2018-06-22 19:36:25,392 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 19:36:25,394 INFO ]: Toolchain (without parser) took 71213.99 ms. Allocated memory was 309.9 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 226.2 MB in the beginning and 201.3 MB in the end (delta: 25.0 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-22 19:36:25,395 INFO ]: SmtParser took 0.08 ms. Allocated memory is still 309.9 MB. Free memory is still 275.3 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 19:36:25,395 INFO ]: ChcToBoogie took 87.32 ms. Allocated memory is still 309.9 MB. Free memory was 226.2 MB in the beginning and 223.2 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 3.6 GB. [2018-06-22 19:36:25,396 INFO ]: Boogie Preprocessor took 113.44 ms. Allocated memory is still 309.9 MB. Free memory was 223.2 MB in the beginning and 220.2 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. [2018-06-22 19:36:25,396 INFO ]: RCFGBuilder took 627.30 ms. Allocated memory was 309.9 MB in the beginning and 326.6 MB in the end (delta: 16.8 MB). Free memory was 220.2 MB in the beginning and 274.1 MB in the end (delta: -53.9 MB). Peak memory consumption was 37.1 MB. Max. memory is 3.6 GB. [2018-06-22 19:36:25,411 INFO ]: TraceAbstraction took 70376.88 ms. Allocated memory was 326.6 MB in the beginning and 1.5 GB in the end (delta: 1.1 GB). Free memory was 274.1 MB in the beginning and 201.3 MB in the end (delta: 72.8 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-22 19:36:25,414 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 275.3 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 87.32 ms. Allocated memory is still 309.9 MB. Free memory was 226.2 MB in the beginning and 223.2 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 113.44 ms. Allocated memory is still 309.9 MB. Free memory was 223.2 MB in the beginning and 220.2 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 627.30 ms. Allocated memory was 309.9 MB in the beginning and 326.6 MB in the end (delta: 16.8 MB). Free memory was 220.2 MB in the beginning and 274.1 MB in the end (delta: -53.9 MB). Peak memory consumption was 37.1 MB. Max. memory is 3.6 GB. * TraceAbstraction took 70376.88 ms. Allocated memory was 326.6 MB in the beginning and 1.5 GB in the end (delta: 1.1 GB). Free memory was 274.1 MB in the beginning and 201.3 MB in the end (delta: 72.8 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 17 quantified variables from 20 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 70.2s OverallTime, 3 OverallIterations, 3 TraceHistogramMax, 0.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 22 SDtfs, 7 SDslu, 47 SDs, 0 SdLazy, 33 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.6s 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: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 2.9s InterpolantComputationTime, 35 NumberOfCodeBlocks, 35 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 32 ConstructedInterpolants, 0 QuantifiedInterpolants, 1776 SizeOfPredicates, 20 NumberOfNonLiveVariables, 1027 ConjunctsInSsa, 23 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_1.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_19-36-25-435.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/peterson_1.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_19-36-25-435.csv Completed graceful shutdown