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/hopv/lia/termination/x_plus_2_pow_n04.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 11:41:55,742 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 11:41:55,744 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 11:41:55,757 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 11:41:55,757 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 11:41:55,758 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 11:41:55,759 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 11:41:55,761 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 11:41:55,762 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 11:41:55,765 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 11:41:55,766 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 11:41:55,766 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 11:41:55,767 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 11:41:55,768 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 11:41:55,769 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 11:41:55,769 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 11:41:55,771 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 11:41:55,776 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 11:41:55,782 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 11:41:55,784 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 11:41:55,786 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 11:41:55,788 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 11:41:55,793 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 11:41:55,793 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 11:41:55,794 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 11:41:55,795 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 11:41:55,796 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 11:41:55,796 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 11:41:55,797 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 11:41:55,797 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 11:41:55,802 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 11:41:55,803 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 11:41:55,803 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 11:41:55,804 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 11:41:55,804 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 11:41:55,804 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 11:41:55,826 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 11:41:55,827 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 11:41:55,827 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 11:41:55,827 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 11:41:55,828 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 11:41:55,828 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 11:41:55,829 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 11:41:55,829 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 11:41:55,829 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 11:41:55,829 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 11:41:55,829 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 11:41:55,830 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 11:41:55,831 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 11:41:55,831 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 11:41:55,831 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 11:41:55,831 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 11:41:55,831 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 11:41:55,832 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 11:41:55,832 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 11:41:55,833 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 11:41:55,833 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 11:41:55,878 INFO ]: Repository-Root is: /tmp [2018-06-22 11:41:55,892 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 11:41:55,899 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 11:41:55,901 INFO ]: Initializing SmtParser... [2018-06-22 11:41:55,901 INFO ]: SmtParser initialized [2018-06-22 11:41:55,902 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/hopv/lia/termination/x_plus_2_pow_n04.smt2 [2018-06-22 11:41:55,903 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 11:41:56,023 INFO ]: Executing SMT file /storage/chc-comp/hopv/lia/termination/x_plus_2_pow_n04.smt2 unknown [2018-06-22 11:41:56,998 INFO ]: Succesfully executed SMT file /storage/chc-comp/hopv/lia/termination/x_plus_2_pow_n04.smt2 [2018-06-22 11:41:57,006 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 11:41:57,014 INFO ]: Walking toolchain with 4 elements. [2018-06-22 11:41:57,015 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 11:41:57,015 INFO ]: Initializing ChcToBoogie... [2018-06-22 11:41:57,015 INFO ]: ChcToBoogie initialized [2018-06-22 11:41:57,021 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 11:41:57" (1/1) ... [2018-06-22 11:41:57,072 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:41:57 Unit [2018-06-22 11:41:57,073 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 11:41:57,073 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 11:41:57,073 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 11:41:57,074 INFO ]: Boogie Preprocessor initialized [2018-06-22 11:41:57,101 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:41:57" (1/1) ... [2018-06-22 11:41:57,102 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:41:57" (1/1) ... [2018-06-22 11:41:57,112 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:41:57" (1/1) ... [2018-06-22 11:41:57,113 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:41:57" (1/1) ... [2018-06-22 11:41:57,130 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:41:57" (1/1) ... [2018-06-22 11:41:57,135 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:41:57" (1/1) ... [2018-06-22 11:41:57,148 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:41:57" (1/1) ... [2018-06-22 11:41:57,150 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 11:41:57,150 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 11:41:57,150 INFO ]: Initializing RCFGBuilder... [2018-06-22 11:41:57,150 INFO ]: RCFGBuilder initialized [2018-06-22 11:41:57,151 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:41:57" (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 11:41:57,165 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 11:41:57,165 INFO ]: Found specification of procedure False [2018-06-22 11:41:57,165 INFO ]: Found implementation of procedure False [2018-06-22 11:41:57,165 INFO ]: Specification and implementation of procedure failDLRunknownCLN24 given in one single declaration [2018-06-22 11:41:57,165 INFO ]: Found specification of procedure failDLRunknownCLN24 [2018-06-22 11:41:57,165 INFO ]: Found implementation of procedure failDLRunknownCLN24 [2018-06-22 11:41:57,165 INFO ]: Specification and implementation of procedure f_1035DLRunknownCLN12 given in one single declaration [2018-06-22 11:41:57,165 INFO ]: Found specification of procedure f_1035DLRunknownCLN12 [2018-06-22 11:41:57,165 INFO ]: Found implementation of procedure f_1035DLRunknownCLN12 [2018-06-22 11:41:57,165 INFO ]: Specification and implementation of procedure f_without_checking_1189DLRunknownCLN19 given in one single declaration [2018-06-22 11:41:57,165 INFO ]: Found specification of procedure f_without_checking_1189DLRunknownCLN19 [2018-06-22 11:41:57,165 INFO ]: Found implementation of procedure f_without_checking_1189DLRunknownCLN19 [2018-06-22 11:41:57,165 INFO ]: Specification and implementation of procedure f_1035DLRunknownCLN5 given in one single declaration [2018-06-22 11:41:57,165 INFO ]: Found specification of procedure f_1035DLRunknownCLN5 [2018-06-22 11:41:57,165 INFO ]: Found implementation of procedure f_1035DLRunknownCLN5 [2018-06-22 11:41:57,165 INFO ]: Specification and implementation of procedure botDLRunknownCLN2 given in one single declaration [2018-06-22 11:41:57,165 INFO ]: Found specification of procedure botDLRunknownCLN2 [2018-06-22 11:41:57,165 INFO ]: Found implementation of procedure botDLRunknownCLN2 [2018-06-22 11:41:57,165 INFO ]: Specification and implementation of procedure failDLRunknownCLN25 given in one single declaration [2018-06-22 11:41:57,165 INFO ]: Found specification of procedure failDLRunknownCLN25 [2018-06-22 11:41:57,166 INFO ]: Found implementation of procedure failDLRunknownCLN25 [2018-06-22 11:41:57,166 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 11:41:57,166 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 11:41:57,166 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 11:41:57,643 INFO ]: Using library mode [2018-06-22 11:41:57,644 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 11:41:57 BoogieIcfgContainer [2018-06-22 11:41:57,644 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 11:41:57,645 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 11:41:57,645 INFO ]: Initializing TraceAbstraction... [2018-06-22 11:41:57,648 INFO ]: TraceAbstraction initialized [2018-06-22 11:41:57,648 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 11:41:57" (1/3) ... [2018-06-22 11:41:57,649 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eeac471 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 11:41:57, skipping insertion in model container [2018-06-22 11:41:57,649 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:41:57" (2/3) ... [2018-06-22 11:41:57,649 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eeac471 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 11:41:57, skipping insertion in model container [2018-06-22 11:41:57,649 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 11:41:57" (3/3) ... [2018-06-22 11:41:57,651 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 11:41:57,659 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 11:41:57,668 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 11:41:57,705 INFO ]: Using default assertion order modulation [2018-06-22 11:41:57,706 INFO ]: Interprodecural is true [2018-06-22 11:41:57,706 INFO ]: Hoare is false [2018-06-22 11:41:57,706 INFO ]: Compute interpolants for FPandBP [2018-06-22 11:41:57,706 INFO ]: Backedges is TWOTRACK [2018-06-22 11:41:57,706 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 11:41:57,706 INFO ]: Difference is false [2018-06-22 11:41:57,706 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 11:41:57,706 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 11:41:57,718 INFO ]: Start isEmpty. Operand 37 states. [2018-06-22 11:41:57,729 INFO ]: Finished isEmpty. Found accepting run of length 6 [2018-06-22 11:41:57,729 INFO ]: Found error trace [2018-06-22 11:41:57,729 INFO ]: trace histogram [1, 1, 1, 1, 1] [2018-06-22 11:41:57,730 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:41:57,733 INFO ]: Analyzing trace with hash 265420687, now seen corresponding path program 1 times [2018-06-22 11:41:57,734 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:41:57,734 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:41:57,766 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:41:57,766 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:41:57,766 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:41:57,780 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:41:57,800 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 11:41:57,811 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 11:41:57,811 INFO ]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-06-22 11:41:57,812 INFO ]: Interpolant automaton has 2 states [2018-06-22 11:41:57,824 INFO ]: Constructing interpolant automaton starting with 2 interpolants. [2018-06-22 11:41:57,824 INFO ]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-06-22 11:41:57,826 INFO ]: Start difference. First operand 37 states. Second operand 2 states. [2018-06-22 11:41:57,844 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:41:57,844 INFO ]: Finished difference Result 29 states and 33 transitions. [2018-06-22 11:41:57,844 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-06-22 11:41:57,845 INFO ]: Start accepts. Automaton has 2 states. Word has length 5 [2018-06-22 11:41:57,845 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:41:57,864 INFO ]: With dead ends: 29 [2018-06-22 11:41:57,864 INFO ]: Without dead ends: 25 [2018-06-22 11:41:57,866 INFO ]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-06-22 11:41:57,882 INFO ]: Start minimizeSevpa. Operand 25 states. [2018-06-22 11:41:57,900 INFO ]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-06-22 11:41:57,901 INFO ]: Start removeUnreachable. Operand 25 states. [2018-06-22 11:41:57,902 INFO ]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2018-06-22 11:41:57,903 INFO ]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 5 [2018-06-22 11:41:57,903 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:41:57,903 INFO ]: Abstraction has 25 states and 29 transitions. [2018-06-22 11:41:57,903 INFO ]: Interpolant automaton has 2 states. [2018-06-22 11:41:57,904 INFO ]: Start isEmpty. Operand 25 states and 29 transitions. [2018-06-22 11:41:57,905 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 11:41:57,905 INFO ]: Found error trace [2018-06-22 11:41:57,905 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:41:57,905 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:41:57,905 INFO ]: Analyzing trace with hash 1936785238, now seen corresponding path program 1 times [2018-06-22 11:41:57,905 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:41:57,906 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:41:57,906 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:41:57,906 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:41:57,906 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:41:57,957 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:41:58,392 WARN ]: Spent 225.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 9 [2018-06-22 11:41:58,537 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 11:41:58,537 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 11:41:58,537 INFO ]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-06-22 11:41:58,538 INFO ]: Interpolant automaton has 6 states [2018-06-22 11:41:58,538 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 11:41:58,538 INFO ]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-06-22 11:41:58,539 INFO ]: Start difference. First operand 25 states and 29 transitions. Second operand 6 states. [2018-06-22 11:41:58,624 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:41:58,624 INFO ]: Finished difference Result 29 states and 35 transitions. [2018-06-22 11:41:58,624 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 11:41:58,624 INFO ]: Start accepts. Automaton has 6 states. Word has length 17 [2018-06-22 11:41:58,625 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:41:58,625 INFO ]: With dead ends: 29 [2018-06-22 11:41:58,625 INFO ]: Without dead ends: 29 [2018-06-22 11:41:58,626 INFO ]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-06-22 11:41:58,626 INFO ]: Start minimizeSevpa. Operand 29 states. [2018-06-22 11:41:58,633 INFO ]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-06-22 11:41:58,633 INFO ]: Start removeUnreachable. Operand 29 states. [2018-06-22 11:41:58,634 INFO ]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2018-06-22 11:41:58,635 INFO ]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 17 [2018-06-22 11:41:58,635 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:41:58,635 INFO ]: Abstraction has 29 states and 35 transitions. [2018-06-22 11:41:58,635 INFO ]: Interpolant automaton has 6 states. [2018-06-22 11:41:58,635 INFO ]: Start isEmpty. Operand 29 states and 35 transitions. [2018-06-22 11:41:58,636 INFO ]: Finished isEmpty. Found accepting run of length 34 [2018-06-22 11:41:58,636 INFO ]: Found error trace [2018-06-22 11:41:58,636 INFO ]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:41:58,636 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:41:58,636 INFO ]: Analyzing trace with hash -1667243742, now seen corresponding path program 1 times [2018-06-22 11:41:58,636 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:41:58,636 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:41:58,637 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:41:58,637 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:41:58,637 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:41:58,658 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:41:58,727 INFO ]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 11:41:58,728 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 11:41:58,728 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 11:41:58,728 INFO ]: Interpolant automaton has 4 states [2018-06-22 11:41:58,728 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 11:41:58,728 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 11:41:58,728 INFO ]: Start difference. First operand 29 states and 35 transitions. Second operand 4 states. [2018-06-22 11:41:58,756 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:41:58,756 INFO ]: Finished difference Result 29 states and 33 transitions. [2018-06-22 11:41:58,757 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 11:41:58,757 INFO ]: Start accepts. Automaton has 4 states. Word has length 33 [2018-06-22 11:41:58,757 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:41:58,758 INFO ]: With dead ends: 29 [2018-06-22 11:41:58,758 INFO ]: Without dead ends: 28 [2018-06-22 11:41:58,758 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 11:41:58,758 INFO ]: Start minimizeSevpa. Operand 28 states. [2018-06-22 11:41:58,763 INFO ]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-06-22 11:41:58,764 INFO ]: Start removeUnreachable. Operand 28 states. [2018-06-22 11:41:58,764 INFO ]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2018-06-22 11:41:58,765 INFO ]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 33 [2018-06-22 11:41:58,765 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:41:58,765 INFO ]: Abstraction has 28 states and 31 transitions. [2018-06-22 11:41:58,765 INFO ]: Interpolant automaton has 4 states. [2018-06-22 11:41:58,765 INFO ]: Start isEmpty. Operand 28 states and 31 transitions. [2018-06-22 11:41:58,766 INFO ]: Finished isEmpty. Found accepting run of length 34 [2018-06-22 11:41:58,766 INFO ]: Found error trace [2018-06-22 11:41:58,766 INFO ]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:41:58,766 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:41:58,766 INFO ]: Analyzing trace with hash -29527425, now seen corresponding path program 1 times [2018-06-22 11:41:58,766 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:41:58,766 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:41:58,767 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:41:58,767 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:41:58,767 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:41:58,810 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:41:59,210 INFO ]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-06-22 11:41:59,210 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 11:41:59,210 INFO ]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-06-22 11:41:59,210 INFO ]: Interpolant automaton has 7 states [2018-06-22 11:41:59,210 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-22 11:41:59,210 INFO ]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-06-22 11:41:59,211 INFO ]: Start difference. First operand 28 states and 31 transitions. Second operand 7 states. [2018-06-22 11:41:59,371 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:41:59,371 INFO ]: Finished difference Result 22 states and 25 transitions. [2018-06-22 11:41:59,373 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 11:41:59,373 INFO ]: Start accepts. Automaton has 7 states. Word has length 33 [2018-06-22 11:41:59,374 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:41:59,374 INFO ]: With dead ends: 22 [2018-06-22 11:41:59,374 INFO ]: Without dead ends: 0 [2018-06-22 11:41:59,374 INFO ]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-06-22 11:41:59,374 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-22 11:41:59,374 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-22 11:41:59,374 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-22 11:41:59,374 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-22 11:41:59,374 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 33 [2018-06-22 11:41:59,374 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:41:59,375 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-22 11:41:59,375 INFO ]: Interpolant automaton has 7 states. [2018-06-22 11:41:59,375 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-22 11:41:59,375 INFO ]: Finished isEmpty. No accepting run. [2018-06-22 11:41:59,381 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 11:41:59 BoogieIcfgContainer [2018-06-22 11:41:59,381 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 11:41:59,382 INFO ]: Toolchain (without parser) took 2375.08 ms. Allocated memory was 305.1 MB in the beginning and 327.2 MB in the end (delta: 22.0 MB). Free memory was 248.7 MB in the beginning and 272.9 MB in the end (delta: -24.2 MB). There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 11:41:59,383 INFO ]: SmtParser took 0.08 ms. Allocated memory is still 305.1 MB. Free memory is still 269.8 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 11:41:59,383 INFO ]: ChcToBoogie took 58.16 ms. Allocated memory is still 305.1 MB. Free memory was 248.7 MB in the beginning and 244.7 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 3.6 GB. [2018-06-22 11:41:59,383 INFO ]: Boogie Preprocessor took 76.56 ms. Allocated memory is still 305.1 MB. Free memory is still 244.7 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 11:41:59,384 INFO ]: RCFGBuilder took 493.71 ms. Allocated memory is still 305.1 MB. Free memory was 244.7 MB in the beginning and 226.7 MB in the end (delta: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 3.6 GB. [2018-06-22 11:41:59,387 INFO ]: TraceAbstraction took 1735.82 ms. Allocated memory was 305.1 MB in the beginning and 327.2 MB in the end (delta: 22.0 MB). Free memory was 226.7 MB in the beginning and 272.9 MB in the end (delta: -46.2 MB). There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 11:41:59,389 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 305.1 MB. Free memory is still 269.8 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 58.16 ms. Allocated memory is still 305.1 MB. Free memory was 248.7 MB in the beginning and 244.7 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 76.56 ms. Allocated memory is still 305.1 MB. Free memory is still 244.7 MB. There was no memory consumed. Max. memory is 3.6 GB. * RCFGBuilder took 493.71 ms. Allocated memory is still 305.1 MB. Free memory was 244.7 MB in the beginning and 226.7 MB in the end (delta: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 1735.82 ms. Allocated memory was 305.1 MB in the beginning and 327.2 MB in the end (delta: 22.0 MB). Free memory was 226.7 MB in the beginning and 272.9 MB in the end (delta: -46.2 MB). There was no memory consumed. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [UNKNOWN] : assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 8 procedures, 37 locations, 1 error locations. SAFE Result, 1.6s OverallTime, 4 OverallIterations, 3 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 99 SDtfs, 4 SDslu, 158 SDs, 0 SdLazy, 59 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=0, 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, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 88 NumberOfCodeBlocks, 88 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 84 ConstructedInterpolants, 0 QuantifiedInterpolants, 6048 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 26/26 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/x_plus_2_pow_n04.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_11-41-59-410.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/x_plus_2_pow_n04.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_11-41-59-410.csv Received shutdown request...