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_2.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 19:36:12,610 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 19:36:12,612 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 19:36:12,625 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 19:36:12,625 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 19:36:12,628 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 19:36:12,629 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 19:36:12,631 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 19:36:12,633 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 19:36:12,633 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 19:36:12,635 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 19:36:12,636 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 19:36:12,636 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 19:36:12,637 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 19:36:12,638 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 19:36:12,639 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 19:36:12,643 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 19:36:12,653 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 19:36:12,654 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 19:36:12,655 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 19:36:12,656 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 19:36:12,658 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 19:36:12,658 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 19:36:12,659 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 19:36:12,659 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 19:36:12,665 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 19:36:12,666 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 19:36:12,666 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 19:36:12,667 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 19:36:12,667 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 19:36:12,669 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 19:36:12,670 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 19:36:12,670 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 19:36:12,671 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 19:36:12,671 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 19:36:12,672 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 19:36:12,684 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 19:36:12,684 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 19:36:12,684 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 19:36:12,685 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 19:36:12,686 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 19:36:12,686 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 19:36:12,686 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 19:36:12,686 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 19:36:12,686 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 19:36:12,686 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 19:36:12,687 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 19:36:12,687 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 19:36:12,687 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 19:36:12,687 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 19:36:12,688 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 19:36:12,688 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 19:36:12,688 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 19:36:12,688 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 19:36:12,688 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 19:36:12,690 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 19:36:12,690 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 19:36:12,736 INFO ]: Repository-Root is: /tmp [2018-06-22 19:36:12,749 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 19:36:12,754 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 19:36:12,755 INFO ]: Initializing SmtParser... [2018-06-22 19:36:12,756 INFO ]: SmtParser initialized [2018-06-22 19:36:12,757 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/peterson_2.smt2 [2018-06-22 19:36:12,758 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 19:36:12,851 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/peterson_2.smt2 unknown [2018-06-22 19:36:13,516 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/peterson_2.smt2 [2018-06-22 19:36:13,520 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 19:36:13,535 INFO ]: Walking toolchain with 4 elements. [2018-06-22 19:36:13,536 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 19:36:13,536 INFO ]: Initializing ChcToBoogie... [2018-06-22 19:36:13,536 INFO ]: ChcToBoogie initialized [2018-06-22 19:36:13,539 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 07:36:13" (1/1) ... [2018-06-22 19:36:13,626 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:36:13 Unit [2018-06-22 19:36:13,626 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 19:36:13,633 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 19:36:13,633 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 19:36:13,633 INFO ]: Boogie Preprocessor initialized [2018-06-22 19:36:13,654 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:36:13" (1/1) ... [2018-06-22 19:36:13,654 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:36:13" (1/1) ... [2018-06-22 19:36:13,676 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:36:13" (1/1) ... [2018-06-22 19:36:13,677 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:36:13" (1/1) ... [2018-06-22 19:36:13,696 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:36:13" (1/1) ... [2018-06-22 19:36:13,697 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:36:13" (1/1) ... [2018-06-22 19:36:13,709 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:36:13" (1/1) ... [2018-06-22 19:36:13,715 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 19:36:13,715 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 19:36:13,715 INFO ]: Initializing RCFGBuilder... [2018-06-22 19:36:13,715 INFO ]: RCFGBuilder initialized [2018-06-22 19:36:13,725 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:36:13" (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 19:36:13,744 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 19:36:13,744 INFO ]: Found specification of procedure False [2018-06-22 19:36:13,744 INFO ]: Found implementation of procedure False [2018-06-22 19:36:13,744 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 19:36:13,744 INFO ]: Found specification of procedure state [2018-06-22 19:36:13,744 INFO ]: Found implementation of procedure state [2018-06-22 19:36:13,744 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 19:36:13,744 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 19:36:13,744 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 19:36:14,324 INFO ]: Using library mode [2018-06-22 19:36:14,325 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 07:36:14 BoogieIcfgContainer [2018-06-22 19:36:14,325 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 19:36:14,326 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 19:36:14,326 INFO ]: Initializing TraceAbstraction... [2018-06-22 19:36:14,333 INFO ]: TraceAbstraction initialized [2018-06-22 19:36:14,333 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 07:36:13" (1/3) ... [2018-06-22 19:36:14,334 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@82f35a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 07:36:14, skipping insertion in model container [2018-06-22 19:36:14,334 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:36:13" (2/3) ... [2018-06-22 19:36:14,334 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@82f35a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 07:36:14, skipping insertion in model container [2018-06-22 19:36:14,334 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 07:36:14" (3/3) ... [2018-06-22 19:36:14,336 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 19:36:14,346 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 19:36:14,355 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 19:36:14,400 INFO ]: Using default assertion order modulation [2018-06-22 19:36:14,401 INFO ]: Interprodecural is true [2018-06-22 19:36:14,401 INFO ]: Hoare is false [2018-06-22 19:36:14,401 INFO ]: Compute interpolants for FPandBP [2018-06-22 19:36:14,401 INFO ]: Backedges is TWOTRACK [2018-06-22 19:36:14,401 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 19:36:14,401 INFO ]: Difference is false [2018-06-22 19:36:14,401 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 19:36:14,401 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 19:36:14,417 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 19:36:14,429 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 19:36:14,430 INFO ]: Found error trace [2018-06-22 19:36:14,430 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:36:14,431 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:36:14,436 INFO ]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times [2018-06-22 19:36:14,438 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:36:14,439 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:36:14,480 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:36:14,480 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:36:14,480 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:36:14,615 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:36:14,827 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 19:36:14,828 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 19:36:14,829 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 19:36:14,830 INFO ]: Interpolant automaton has 4 states [2018-06-22 19:36:14,843 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 19:36:14,844 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 19:36:14,847 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 19:36:15,017 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:36:15,017 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 19:36:15,018 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 19:36:15,019 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 19:36:15,020 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:36:15,033 INFO ]: With dead ends: 13 [2018-06-22 19:36:15,033 INFO ]: Without dead ends: 13 [2018-06-22 19:36:15,035 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 19:36:15,053 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 19:36:15,090 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 19:36:15,091 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 19:36:15,092 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 19:36:15,093 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 19:36:15,093 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:36:15,093 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 19:36:15,093 INFO ]: Interpolant automaton has 4 states. [2018-06-22 19:36:15,093 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 19:36:15,095 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 19:36:15,095 INFO ]: Found error trace [2018-06-22 19:36:15,095 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:36:15,095 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:36:15,095 INFO ]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times [2018-06-22 19:36:15,095 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:36:15,095 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:36:15,096 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:36:15,096 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:36:15,096 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:36:15,217 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:36:16,300 WARN ]: Spent 791.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 69 [2018-06-22 19:36:16,386 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 19:36:16,386 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:36:16,386 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 19:36:16,395 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:36:16,623 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:36:16,637 INFO ]: Computing forward predicates... [2018-06-22 19:36:18,449 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 19:36:18,459 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 19:36:18,462 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 19:36:18,469 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 19:36:18,479 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 19:36:18,488 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 19:36:18,493 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 19:36:18,497 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 19:36:18,515 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 19:36:18,519 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 19:36:18,526 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 19:36:18,527 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 19:36:18,529 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 19:36:18,750 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 19:36:18,760 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 19:36:18,785 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 19:36:18,787 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 19:36:18,792 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 19:36:18,800 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 19:36:18,835 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 19:36:18,839 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 19:36:18,863 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 19:36:18,868 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 19:36:18,876 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 19:36:18,883 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 19:36:18,938 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 19:36:19,128 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 19:36:19,136 WARN ]: expecting exponential blowup for input size 9 [2018-06-22 19:36:19,336 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 19:36:19,338 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 19:36:19,355 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 19:36:19,385 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 19:36:19,389 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 19:36:19,394 WARN ]: expecting exponential blowup for input size 8 [2018-06-22 19:36:19,396 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 19:36:19,409 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 19:36:19,412 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 19:36:19,414 WARN ]: expecting exponential blowup for input size 8 [2018-06-22 19:36:19,417 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 19:36:19,418 WARN ]: expecting exponential blowup for input size 8 [2018-06-22 19:36:19,422 WARN ]: expecting exponential blowup for input size 8 [2018-06-22 19:36:19,439 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 19:36:19,445 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 19:36:19,448 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 19:36:19,449 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 19:36:19,454 WARN ]: expecting exponential blowup for input size 10 [2018-06-22 19:36:19,888 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 19:36:19,889 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 19:36:19,895 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 19:36:19,896 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 19:36:19,954 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 19:36:19,955 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 19:36:19,956 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 19:36:19,956 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 19:36:19,957 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 19:36:19,961 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 19:36:19,963 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 19:36:19,964 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 19:36:19,965 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 19:36:19,967 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 19:36:42,194 WARN ]: Spent 721.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 13 [2018-06-22 19:36:42,287 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 19:36:42,332 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:36:42,332 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-06-22 19:36:42,333 INFO ]: Interpolant automaton has 8 states [2018-06-22 19:36:42,333 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 19:36:42,333 INFO ]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-06-22 19:36:42,333 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2018-06-22 19:36:42,569 WARN ]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2018-06-22 19:36:42,726 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:36:42,727 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 19:36:42,727 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 19:36:42,727 INFO ]: Start accepts. Automaton has 8 states. Word has length 13 [2018-06-22 19:36:42,727 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:36:42,728 INFO ]: With dead ends: 15 [2018-06-22 19:36:42,728 INFO ]: Without dead ends: 15 [2018-06-22 19:36:42,729 INFO ]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-06-22 19:36:42,729 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 19:36:42,731 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 19:36:42,731 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 19:36:42,732 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 19:36:42,732 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 19:36:42,732 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:36:42,732 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 19:36:42,732 INFO ]: Interpolant automaton has 8 states. [2018-06-22 19:36:42,732 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 19:36:42,732 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 19:36:42,732 INFO ]: Found error trace [2018-06-22 19:36:42,732 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:36:42,733 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:36:42,733 INFO ]: Analyzing trace with hash -1649658231, now seen corresponding path program 2 times [2018-06-22 19:36:42,733 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:36:42,733 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:36:42,734 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:36:42,734 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:36:42,734 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:36:42,903 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:36:43,968 WARN ]: Spent 611.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 54 [2018-06-22 19:36:44,510 WARN ]: Spent 456.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 89 [2018-06-22 19:36:44,761 WARN ]: Spent 204.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2018-06-22 19:36:44,809 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 19:36:44,809 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:36:44,809 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 19:36:44,825 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 19:36:45,077 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 19:36:45,077 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:36:45,087 INFO ]: Computing forward predicates... Received shutdown request... [2018-06-22 19:37:19,801 INFO ]: Timeout while computing interpolants [2018-06-22 19:37:20,002 WARN ]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 19:37:20,002 WARN ]: Verification canceled [2018-06-22 19:37:20,006 WARN ]: Timeout [2018-06-22 19:37:20,006 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 07:37:20 BoogieIcfgContainer [2018-06-22 19:37:20,007 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 19:37:20,007 INFO ]: Toolchain (without parser) took 66486.86 ms. Allocated memory was 304.6 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 642.0 MB in the end (delta: -423.0 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-22 19:37:20,008 INFO ]: SmtParser took 0.08 ms. Allocated memory is still 304.6 MB. Free memory is still 270.1 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 19:37:20,010 INFO ]: ChcToBoogie took 91.00 ms. Allocated memory is still 304.6 MB. Free memory was 219.0 MB in the beginning and 216.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 3.6 GB. [2018-06-22 19:37:20,010 INFO ]: Boogie Preprocessor took 81.93 ms. Allocated memory is still 304.6 MB. Free memory was 216.0 MB in the beginning and 213.0 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. [2018-06-22 19:37:20,010 INFO ]: RCFGBuilder took 609.94 ms. Allocated memory was 304.6 MB in the beginning and 329.8 MB in the end (delta: 25.2 MB). Free memory was 213.0 MB in the beginning and 275.6 MB in the end (delta: -62.7 MB). Peak memory consumption was 34.8 MB. Max. memory is 3.6 GB. [2018-06-22 19:37:20,011 INFO ]: TraceAbstraction took 65680.14 ms. Allocated memory was 329.8 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 275.6 MB in the beginning and 643.5 MB in the end (delta: -367.8 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-22 19:37:20,013 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 304.6 MB. Free memory is still 270.1 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 91.00 ms. Allocated memory is still 304.6 MB. Free memory was 219.0 MB in the beginning and 216.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 81.93 ms. Allocated memory is still 304.6 MB. Free memory was 216.0 MB in the beginning and 213.0 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 609.94 ms. Allocated memory was 304.6 MB in the beginning and 329.8 MB in the end (delta: 25.2 MB). Free memory was 213.0 MB in the beginning and 275.6 MB in the end (delta: -62.7 MB). Peak memory consumption was 34.8 MB. Max. memory is 3.6 GB. * TraceAbstraction took 65680.14 ms. Allocated memory was 329.8 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 275.6 MB in the beginning and 643.5 MB in the end (delta: -367.8 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 30 quantified variables from 39 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 65.6s 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, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.0s 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, 0.3s SatisfiabilityAnalysisTime, 27.0s 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_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_19-37-20-027.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/peterson_2.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_19-37-20-027.csv Completed graceful shutdown