java -Xss4m -Xmx4000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCHC_wBE.xml --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf -i /storage/chc-comp/llreve-bench/smt2/loop__loop2.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-14921ce [2018-06-24 21:42:27,917 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-24 21:42:27,919 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-24 21:42:27,933 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-24 21:42:27,933 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-24 21:42:27,935 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-24 21:42:27,936 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-24 21:42:27,940 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-24 21:42:27,941 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-24 21:42:27,943 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-24 21:42:27,944 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-24 21:42:27,944 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-24 21:42:27,945 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-24 21:42:27,949 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-24 21:42:27,950 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-24 21:42:27,950 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-24 21:42:27,952 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-24 21:42:27,962 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-24 21:42:27,963 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-24 21:42:27,964 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-24 21:42:27,965 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-24 21:42:27,974 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-24 21:42:27,974 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-24 21:42:27,974 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-24 21:42:27,975 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-24 21:42:27,976 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-24 21:42:27,976 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-24 21:42:27,977 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-24 21:42:27,981 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-24 21:42:27,981 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-24 21:42:27,982 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-24 21:42:27,983 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-24 21:42:27,983 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-24 21:42:27,984 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-24 21:42:27,984 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-24 21:42:27,985 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-24 21:42:28,006 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-24 21:42:28,007 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-24 21:42:28,007 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-24 21:42:28,007 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-24 21:42:28,008 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-24 21:42:28,008 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-24 21:42:28,009 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-24 21:42:28,009 INFO L133 SettingsManager]: * Use SBE=true [2018-06-24 21:42:28,009 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-24 21:42:28,009 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-24 21:42:28,009 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-24 21:42:28,010 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-24 21:42:28,010 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-24 21:42:28,010 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-24 21:42:28,010 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-24 21:42:28,010 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-24 21:42:28,011 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-24 21:42:28,011 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-24 21:42:28,011 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-24 21:42:28,011 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-24 21:42:28,011 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-24 21:42:28,013 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-24 21:42:28,013 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-24 21:42:28,049 INFO ]: Repository-Root is: /tmp [2018-06-24 21:42:28,064 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-24 21:42:28,070 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-24 21:42:28,071 INFO ]: Initializing SmtParser... [2018-06-24 21:42:28,071 INFO ]: SmtParser initialized [2018-06-24 21:42:28,072 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/llreve-bench/smt2/loop__loop2.smt2 [2018-06-24 21:42:28,073 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 [2018-06-24 21:42:28,161 INFO ]: Executing SMT file /storage/chc-comp/llreve-bench/smt2/loop__loop2.smt2 unknown de.uni_freiburg.informatik.ultimate.plugins.generator.treeautomizer.parsing.HornClauseParserScript$1@64d1d806 [2018-06-24 21:42:28,324 INFO ]: Succesfully executed SMT file /storage/chc-comp/llreve-bench/smt2/loop__loop2.smt2 [2018-06-24 21:42:28,328 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-24 21:42:28,343 INFO ]: Walking toolchain with 5 elements. [2018-06-24 21:42:28,344 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-24 21:42:28,344 INFO ]: Initializing ChcToBoogie... [2018-06-24 21:42:28,344 INFO ]: ChcToBoogie initialized [2018-06-24 21:42:28,348 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 24.06 09:42:28" (1/1) ... [2018-06-24 21:42:28,403 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:42:28 Unit [2018-06-24 21:42:28,403 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-24 21:42:28,403 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-24 21:42:28,403 INFO ]: Initializing Boogie Preprocessor... [2018-06-24 21:42:28,404 INFO ]: Boogie Preprocessor initialized [2018-06-24 21:42:28,424 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:42:28" (1/1) ... [2018-06-24 21:42:28,424 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:42:28" (1/1) ... [2018-06-24 21:42:28,431 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:42:28" (1/1) ... [2018-06-24 21:42:28,432 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:42:28" (1/1) ... [2018-06-24 21:42:28,434 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:42:28" (1/1) ... [2018-06-24 21:42:28,436 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:42:28" (1/1) ... [2018-06-24 21:42:28,438 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:42:28" (1/1) ... [2018-06-24 21:42:28,439 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-24 21:42:28,439 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-24 21:42:28,440 INFO ]: Initializing RCFGBuilder... [2018-06-24 21:42:28,440 INFO ]: RCFGBuilder initialized [2018-06-24 21:42:28,440 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:42:28" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2018-06-24 21:42:28,456 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-24 21:42:28,456 INFO ]: Found specification of procedure gotoProc [2018-06-24 21:42:28,456 INFO ]: Found implementation of procedure gotoProc [2018-06-24 21:42:28,456 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-24 21:42:28,456 INFO ]: Found specification of procedure Ultimate.START [2018-06-24 21:42:28,456 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 [2018-06-24 21:42:28,657 INFO ]: Using library mode [2018-06-24 21:42:28,657 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.06 09:42:28 BoogieIcfgContainer [2018-06-24 21:42:28,658 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-24 21:42:28,658 INFO ]: ------------------------BlockEncodingV2---------------------------- [2018-06-24 21:42:28,658 INFO ]: Initializing BlockEncodingV2... [2018-06-24 21:42:28,664 INFO ]: BlockEncodingV2 initialized [2018-06-24 21:42:28,664 INFO ]: Executing the observer BlockEncodingObserver from plugin BlockEncodingV2 for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.06 09:42:28" (1/1) ... [2018-06-24 21:42:28,687 INFO ]: Initial Icfg 10 locations, 12 edges [2018-06-24 21:42:28,694 INFO ]: Using Remove infeasible edges [2018-06-24 21:42:28,695 INFO ]: Using Maximize final states [2018-06-24 21:42:28,695 INFO ]: Using Minimize states even if more edges are added than removed.=false [2018-06-24 21:42:28,695 INFO ]: Using Minimize states using LBE with the strategy=MULTI [2018-06-24 21:42:28,697 INFO ]: Using Remove sink states [2018-06-24 21:42:28,697 INFO ]: Using Apply optimizations until nothing changes=true [2018-06-24 21:42:28,697 INFO ]: Using Use SBE [2018-06-24 21:42:28,704 INFO ]: SBE split 0 edges [2018-06-24 21:42:28,712 INFO ]: Removed 2 edges and 2 locations because of local infeasibility [2018-06-24 21:42:28,715 INFO ]: 0 new accepting states [2018-06-24 21:42:28,744 INFO ]: Removed 4 edges and 2 locations by large block encoding [2018-06-24 21:42:28,746 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-24 21:42:28,750 INFO ]: Removed 0 edges and 0 locations because of local infeasibility [2018-06-24 21:42:28,750 INFO ]: 0 new accepting states [2018-06-24 21:42:28,750 INFO ]: Removed 0 edges and 0 locations by large block encoding [2018-06-24 21:42:28,750 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-24 21:42:28,755 INFO ]: Encoded RCFG 6 locations, 8 edges [2018-06-24 21:42:28,756 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 24.06 09:42:28 BasicIcfg [2018-06-24 21:42:28,756 INFO ]: ------------------------ END BlockEncodingV2---------------------------- [2018-06-24 21:42:28,757 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-24 21:42:28,757 INFO ]: Initializing TraceAbstraction... [2018-06-24 21:42:28,761 INFO ]: TraceAbstraction initialized [2018-06-24 21:42:28,761 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 24.06 09:42:28" (1/4) ... [2018-06-24 21:42:28,762 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c77569d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 24.06 09:42:28, skipping insertion in model container [2018-06-24 21:42:28,762 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:42:28" (2/4) ... [2018-06-24 21:42:28,762 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c77569d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.06 09:42:28, skipping insertion in model container [2018-06-24 21:42:28,762 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.06 09:42:28" (3/4) ... [2018-06-24 21:42:28,762 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c77569d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.06 09:42:28, skipping insertion in model container [2018-06-24 21:42:28,763 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 24.06 09:42:28" (4/4) ... [2018-06-24 21:42:28,764 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver_BEv2 [2018-06-24 21:42:28,776 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-24 21:42:28,782 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-24 21:42:28,826 INFO ]: Using default assertion order modulation [2018-06-24 21:42:28,826 INFO ]: Interprodecural is true [2018-06-24 21:42:28,826 INFO ]: Hoare is false [2018-06-24 21:42:28,826 INFO ]: Compute interpolants for FPandBP [2018-06-24 21:42:28,826 INFO ]: Backedges is TWOTRACK [2018-06-24 21:42:28,826 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-24 21:42:28,826 INFO ]: Difference is false [2018-06-24 21:42:28,826 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-24 21:42:28,826 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-24 21:42:28,836 INFO ]: Start isEmpty. Operand 6 states. [2018-06-24 21:42:28,848 INFO ]: Finished isEmpty. Found accepting run of length 6 [2018-06-24 21:42:28,848 INFO ]: Found error trace [2018-06-24 21:42:28,848 INFO ]: trace histogram [1, 1, 1, 1, 1] [2018-06-24 21:42:28,849 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:42:28,853 INFO ]: Analyzing trace with hash 37311172, now seen corresponding path program 1 times [2018-06-24 21:42:28,855 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:42:28,856 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:42:28,893 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:42:28,894 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:42:28,894 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:42:28,928 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:42:28,980 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 21:42:28,982 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-24 21:42:28,982 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-24 21:42:28,983 INFO ]: Interpolant automaton has 3 states [2018-06-24 21:42:28,994 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-24 21:42:28,995 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-24 21:42:28,998 INFO ]: Start difference. First operand 6 states. Second operand 3 states. [2018-06-24 21:42:29,133 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:42:29,134 INFO ]: Finished difference Result 7 states and 11 transitions. [2018-06-24 21:42:29,136 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-24 21:42:29,137 INFO ]: Start accepts. Automaton has 3 states. Word has length 5 [2018-06-24 21:42:29,137 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:42:29,144 INFO ]: With dead ends: 7 [2018-06-24 21:42:29,144 INFO ]: Without dead ends: 7 [2018-06-24 21:42:29,146 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-24 21:42:29,158 INFO ]: Start minimizeSevpa. Operand 7 states. [2018-06-24 21:42:29,190 INFO ]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-06-24 21:42:29,191 INFO ]: Start removeUnreachable. Operand 7 states. [2018-06-24 21:42:29,191 INFO ]: Finished removeUnreachable. Reduced from 7 states to 7 states and 11 transitions. [2018-06-24 21:42:29,193 INFO ]: Start accepts. Automaton has 7 states and 11 transitions. Word has length 5 [2018-06-24 21:42:29,193 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:42:29,193 INFO ]: Abstraction has 7 states and 11 transitions. [2018-06-24 21:42:29,193 INFO ]: Interpolant automaton has 3 states. [2018-06-24 21:42:29,193 INFO ]: Start isEmpty. Operand 7 states and 11 transitions. [2018-06-24 21:42:29,193 INFO ]: Finished isEmpty. Found accepting run of length 7 [2018-06-24 21:42:29,193 INFO ]: Found error trace [2018-06-24 21:42:29,193 INFO ]: trace histogram [1, 1, 1, 1, 1, 1] [2018-06-24 21:42:29,193 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:42:29,193 INFO ]: Analyzing trace with hash 1156261132, now seen corresponding path program 1 times [2018-06-24 21:42:29,193 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:42:29,193 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:42:29,194 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:42:29,194 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:42:29,194 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:42:29,215 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:42:29,355 INFO ]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 21:42:29,355 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-24 21:42:29,355 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-24 21:42:29,357 INFO ]: Interpolant automaton has 3 states [2018-06-24 21:42:29,357 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-24 21:42:29,357 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-24 21:42:29,357 INFO ]: Start difference. First operand 7 states and 11 transitions. Second operand 3 states. [2018-06-24 21:42:29,476 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:42:29,476 INFO ]: Finished difference Result 8 states and 14 transitions. [2018-06-24 21:42:29,476 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-24 21:42:29,477 INFO ]: Start accepts. Automaton has 3 states. Word has length 6 [2018-06-24 21:42:29,477 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:42:29,477 INFO ]: With dead ends: 8 [2018-06-24 21:42:29,477 INFO ]: Without dead ends: 7 [2018-06-24 21:42:29,478 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-24 21:42:29,478 INFO ]: Start minimizeSevpa. Operand 7 states. [2018-06-24 21:42:29,479 INFO ]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-06-24 21:42:29,479 INFO ]: Start removeUnreachable. Operand 7 states. [2018-06-24 21:42:29,479 INFO ]: Finished removeUnreachable. Reduced from 7 states to 7 states and 9 transitions. [2018-06-24 21:42:29,479 INFO ]: Start accepts. Automaton has 7 states and 9 transitions. Word has length 6 [2018-06-24 21:42:29,479 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:42:29,479 INFO ]: Abstraction has 7 states and 9 transitions. [2018-06-24 21:42:29,479 INFO ]: Interpolant automaton has 3 states. [2018-06-24 21:42:29,479 INFO ]: Start isEmpty. Operand 7 states and 9 transitions. [2018-06-24 21:42:29,480 INFO ]: Finished isEmpty. Found accepting run of length 7 [2018-06-24 21:42:29,480 INFO ]: Found error trace [2018-06-24 21:42:29,481 INFO ]: trace histogram [1, 1, 1, 1, 1, 1] [2018-06-24 21:42:29,481 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:42:29,481 INFO ]: Analyzing trace with hash 1156320714, now seen corresponding path program 1 times [2018-06-24 21:42:29,481 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:42:29,481 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:42:29,482 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:42:29,482 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:42:29,482 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:42:29,496 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:42:29,608 INFO ]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 21:42:29,608 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-24 21:42:29,608 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-24 21:42:29,608 INFO ]: Interpolant automaton has 3 states [2018-06-24 21:42:29,608 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-24 21:42:29,608 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-24 21:42:29,609 INFO ]: Start difference. First operand 7 states and 9 transitions. Second operand 3 states. [2018-06-24 21:42:29,640 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:42:29,640 INFO ]: Finished difference Result 8 states and 11 transitions. [2018-06-24 21:42:29,640 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-24 21:42:29,640 INFO ]: Start accepts. Automaton has 3 states. Word has length 6 [2018-06-24 21:42:29,641 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:42:29,641 INFO ]: With dead ends: 8 [2018-06-24 21:42:29,641 INFO ]: Without dead ends: 8 [2018-06-24 21:42:29,641 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-24 21:42:29,641 INFO ]: Start minimizeSevpa. Operand 8 states. [2018-06-24 21:42:29,642 INFO ]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-06-24 21:42:29,642 INFO ]: Start removeUnreachable. Operand 8 states. [2018-06-24 21:42:29,643 INFO ]: Finished removeUnreachable. Reduced from 8 states to 8 states and 11 transitions. [2018-06-24 21:42:29,643 INFO ]: Start accepts. Automaton has 8 states and 11 transitions. Word has length 6 [2018-06-24 21:42:29,643 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:42:29,643 INFO ]: Abstraction has 8 states and 11 transitions. [2018-06-24 21:42:29,643 INFO ]: Interpolant automaton has 3 states. [2018-06-24 21:42:29,643 INFO ]: Start isEmpty. Operand 8 states and 11 transitions. [2018-06-24 21:42:29,643 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-24 21:42:29,643 INFO ]: Found error trace [2018-06-24 21:42:29,643 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-24 21:42:29,643 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:42:29,643 INFO ]: Analyzing trace with hash 1485848357, now seen corresponding path program 1 times [2018-06-24 21:42:29,643 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:42:29,643 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:42:29,644 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:42:29,644 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:42:29,644 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:42:29,670 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:42:29,751 INFO ]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 21:42:29,751 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:42:29,751 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 [2018-06-24 21:42:29,758 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:42:29,789 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:42:29,797 INFO ]: Computing forward predicates... [2018-06-24 21:42:30,087 INFO ]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 21:42:30,107 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-24 21:42:30,107 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2018-06-24 21:42:30,107 INFO ]: Interpolant automaton has 7 states [2018-06-24 21:42:30,108 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-24 21:42:30,108 INFO ]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-06-24 21:42:30,108 INFO ]: Start difference. First operand 8 states and 11 transitions. Second operand 7 states. [2018-06-24 21:42:30,274 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:42:30,274 INFO ]: Finished difference Result 8 states and 14 transitions. [2018-06-24 21:42:30,275 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-24 21:42:30,275 INFO ]: Start accepts. Automaton has 7 states. Word has length 7 [2018-06-24 21:42:30,275 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:42:30,276 INFO ]: With dead ends: 8 [2018-06-24 21:42:30,276 INFO ]: Without dead ends: 0 [2018-06-24 21:42:30,276 INFO ]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-06-24 21:42:30,276 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-24 21:42:30,276 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-24 21:42:30,276 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-24 21:42:30,276 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-24 21:42:30,276 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 7 [2018-06-24 21:42:30,276 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:42:30,276 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-24 21:42:30,276 INFO ]: Interpolant automaton has 7 states. [2018-06-24 21:42:30,276 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-24 21:42:30,276 INFO ]: Finished isEmpty. No accepting run. [2018-06-24 21:42:30,279 INFO ]: Did not count any witness invariants because Icfg is not BoogieIcfg [2018-06-24 21:42:30,281 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.06 09:42:30 BasicIcfg [2018-06-24 21:42:30,281 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-24 21:42:30,282 INFO ]: Toolchain (without parser) took 1943.79 ms. Allocated memory is still 307.2 MB. Free memory was 263.6 MB in the beginning and 205.9 MB in the end (delta: 57.7 MB). Peak memory consumption was 57.7 MB. Max. memory is 3.6 GB. [2018-06-24 21:42:30,283 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 307.2 MB. Free memory is still 272.7 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-24 21:42:30,287 INFO ]: ChcToBoogie took 59.41 ms. Allocated memory is still 307.2 MB. Free memory was 263.6 MB in the beginning and 261.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-24 21:42:30,287 INFO ]: Boogie Preprocessor took 35.54 ms. Allocated memory is still 307.2 MB. Free memory was 261.6 MB in the beginning and 260.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 3.6 GB. [2018-06-24 21:42:30,288 INFO ]: RCFGBuilder took 218.07 ms. Allocated memory is still 307.2 MB. Free memory was 260.6 MB in the beginning and 252.5 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 3.6 GB. [2018-06-24 21:42:30,288 INFO ]: BlockEncodingV2 took 97.72 ms. Allocated memory is still 307.2 MB. Free memory was 252.5 MB in the beginning and 249.6 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. [2018-06-24 21:42:30,289 INFO ]: TraceAbstraction took 1524.39 ms. Allocated memory is still 307.2 MB. Free memory was 249.6 MB in the beginning and 205.9 MB in the end (delta: 43.6 MB). Peak memory consumption was 43.6 MB. Max. memory is 3.6 GB. [2018-06-24 21:42:30,297 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.plugins.blockencoding: - StatisticsResult: Initial Icfg 10 locations, 12 edges - StatisticsResult: Encoded RCFG 6 locations, 8 edges * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.07 ms. Allocated memory is still 307.2 MB. Free memory is still 272.7 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 59.41 ms. Allocated memory is still 307.2 MB. Free memory was 263.6 MB in the beginning and 261.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 35.54 ms. Allocated memory is still 307.2 MB. Free memory was 261.6 MB in the beginning and 260.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 3.6 GB. * RCFGBuilder took 218.07 ms. Allocated memory is still 307.2 MB. Free memory was 260.6 MB in the beginning and 252.5 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 3.6 GB. * BlockEncodingV2 took 97.72 ms. Allocated memory is still 307.2 MB. Free memory was 252.5 MB in the beginning and 249.6 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 1524.39 ms. Allocated memory is still 307.2 MB. Free memory was 249.6 MB in the beginning and 205.9 MB in the end (delta: 43.6 MB). Peak memory consumption was 43.6 MB. 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 2 procedures, 6 locations, 1 error locations. SAFE Result, 1.4s OverallTime, 4 OverallIterations, 1 TraceHistogramMax, 0.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 22 SDtfs, 0 SDslu, 12 SDs, 0 SdLazy, 39 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=8occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 31 NumberOfCodeBlocks, 31 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 26 ConstructedInterpolants, 0 QuantifiedInterpolants, 497 SizeOfPredicates, 4 NumberOfNonLiveVariables, 87 ConjunctsInSsa, 17 ConjunctsInUnsatCore, 5 InterpolantComputations, 3 PerfectInterpolantSequences, 5/8 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/loop__loop2.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-GraphSizeCsvProvider-0-2018-06-24_21-42-30-319.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/loop__loop2.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-GraphSizeCsvProvider-1-2018-06-24_21-42-30-319.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/loop__loop2.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-Benchmark-0-2018-06-24_21-42-30-319.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/loop__loop2.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-24_21-42-30-319.csv Received shutdown request...