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_Goto.epf -i /storage/chc-comp/vmt-chc-benchmarks/ctigar/nest-len.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 05:44:51,883 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 05:44:51,885 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 05:44:51,898 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 05:44:51,898 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 05:44:51,899 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 05:44:51,900 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 05:44:51,905 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 05:44:51,908 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 05:44:51,908 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 05:44:51,909 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 05:44:51,910 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 05:44:51,910 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 05:44:51,913 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 05:44:51,914 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 05:44:51,914 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 05:44:51,923 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 05:44:51,925 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 05:44:51,926 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 05:44:51,930 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 05:44:51,931 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 05:44:51,935 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 05:44:51,935 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 05:44:51,936 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 05:44:51,936 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 05:44:51,937 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 05:44:51,939 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 05:44:51,940 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 05:44:51,940 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 05:44:51,941 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 05:44:51,941 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 05:44:51,947 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 05:44:51,947 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 05:44:51,948 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 05:44:51,948 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 05:44:51,948 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 05:44:51,966 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 05:44:51,966 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 05:44:51,967 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 05:44:51,967 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 05:44:51,968 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 05:44:51,968 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 05:44:51,968 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 05:44:51,968 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 05:44:51,969 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 05:44:51,969 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 05:44:51,970 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 05:44:51,970 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 05:44:51,970 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 05:44:51,970 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 05:44:51,970 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 05:44:51,970 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 05:44:51,971 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 05:44:51,972 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 05:44:51,972 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 05:44:52,014 INFO ]: Repository-Root is: /tmp [2018-06-22 05:44:52,030 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 05:44:52,036 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 05:44:52,037 INFO ]: Initializing SmtParser... [2018-06-22 05:44:52,037 INFO ]: SmtParser initialized [2018-06-22 05:44:52,038 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/nest-len.c.smt2 [2018-06-22 05:44:52,039 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 05:44:52,118 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/nest-len.c.smt2 unknown [2018-06-22 05:44:52,515 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/nest-len.c.smt2 [2018-06-22 05:44:52,520 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 05:44:52,527 INFO ]: Walking toolchain with 4 elements. [2018-06-22 05:44:52,528 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 05:44:52,528 INFO ]: Initializing ChcToBoogie... [2018-06-22 05:44:52,528 INFO ]: ChcToBoogie initialized [2018-06-22 05:44:52,531 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:44:52" (1/1) ... [2018-06-22 05:44:52,587 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:44:52 Unit [2018-06-22 05:44:52,587 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 05:44:52,587 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 05:44:52,587 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 05:44:52,587 INFO ]: Boogie Preprocessor initialized [2018-06-22 05:44:52,608 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:44:52" (1/1) ... [2018-06-22 05:44:52,608 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:44:52" (1/1) ... [2018-06-22 05:44:52,629 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:44:52" (1/1) ... [2018-06-22 05:44:52,629 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:44:52" (1/1) ... [2018-06-22 05:44:52,635 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:44:52" (1/1) ... [2018-06-22 05:44:52,637 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:44:52" (1/1) ... [2018-06-22 05:44:52,647 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:44:52" (1/1) ... [2018-06-22 05:44:52,650 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 05:44:52,650 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 05:44:52,650 INFO ]: Initializing RCFGBuilder... [2018-06-22 05:44:52,651 INFO ]: RCFGBuilder initialized [2018-06-22 05:44:52,651 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:44:52" (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 05:44:52,685 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 05:44:52,685 INFO ]: Found specification of procedure gotoProc [2018-06-22 05:44:52,685 INFO ]: Found implementation of procedure gotoProc [2018-06-22 05:44:52,685 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 05:44:52,685 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 05:44:52,685 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 05:44:52,977 INFO ]: Using library mode [2018-06-22 05:44:52,977 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:44:52 BoogieIcfgContainer [2018-06-22 05:44:52,977 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 05:44:52,978 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 05:44:52,978 INFO ]: Initializing TraceAbstraction... [2018-06-22 05:44:52,993 INFO ]: TraceAbstraction initialized [2018-06-22 05:44:52,993 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:44:52" (1/3) ... [2018-06-22 05:44:52,994 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@580614b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 05:44:52, skipping insertion in model container [2018-06-22 05:44:52,994 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:44:52" (2/3) ... [2018-06-22 05:44:52,995 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@580614b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 05:44:52, skipping insertion in model container [2018-06-22 05:44:52,995 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:44:52" (3/3) ... [2018-06-22 05:44:52,997 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 05:44:53,010 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 05:44:53,019 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 05:44:53,075 INFO ]: Using default assertion order modulation [2018-06-22 05:44:53,076 INFO ]: Interprodecural is true [2018-06-22 05:44:53,076 INFO ]: Hoare is false [2018-06-22 05:44:53,076 INFO ]: Compute interpolants for FPandBP [2018-06-22 05:44:53,076 INFO ]: Backedges is TWOTRACK [2018-06-22 05:44:53,077 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 05:44:53,077 INFO ]: Difference is false [2018-06-22 05:44:53,077 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 05:44:53,077 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 05:44:53,098 INFO ]: Start isEmpty. Operand 10 states. [2018-06-22 05:44:53,112 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-22 05:44:53,112 INFO ]: Found error trace [2018-06-22 05:44:53,113 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:44:53,113 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:44:53,119 INFO ]: Analyzing trace with hash 1285054476, now seen corresponding path program 1 times [2018-06-22 05:44:53,122 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:44:53,123 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:44:53,160 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:44:53,160 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:44:53,160 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:44:53,211 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:44:53,318 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:44:53,320 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 05:44:53,321 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 05:44:53,322 INFO ]: Interpolant automaton has 3 states [2018-06-22 05:44:53,334 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 05:44:53,334 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 05:44:53,336 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-22 05:44:53,395 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:44:53,395 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-22 05:44:53,395 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 05:44:53,396 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-22 05:44:53,397 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:44:53,405 INFO ]: With dead ends: 9 [2018-06-22 05:44:53,405 INFO ]: Without dead ends: 9 [2018-06-22 05:44:53,406 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 [2018-06-22 05:44:53,421 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-22 05:44:53,443 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-22 05:44:53,444 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-22 05:44:53,445 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-22 05:44:53,446 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-22 05:44:53,446 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:44:53,446 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-22 05:44:53,446 INFO ]: Interpolant automaton has 3 states. [2018-06-22 05:44:53,446 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-22 05:44:53,447 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 05:44:53,447 INFO ]: Found error trace [2018-06-22 05:44:53,447 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:44:53,447 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:44:53,447 INFO ]: Analyzing trace with hash 1180100628, now seen corresponding path program 1 times [2018-06-22 05:44:53,447 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:44:53,447 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:44:53,450 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:44:53,450 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:44:53,450 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:44:53,497 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:44:53,706 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:44:53,706 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:44:53,706 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 05:44:53,713 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:44:53,768 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:44:53,775 INFO ]: Computing forward predicates... [2018-06-22 05:44:54,122 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:44:54,149 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:44:54,149 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-22 05:44:54,150 INFO ]: Interpolant automaton has 5 states [2018-06-22 05:44:54,150 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-22 05:44:54,150 INFO ]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-06-22 05:44:54,150 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-06-22 05:44:54,220 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:44:54,220 INFO ]: Finished difference Result 10 states and 10 transitions. [2018-06-22 05:44:54,220 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-22 05:44:54,220 INFO ]: Start accepts. Automaton has 5 states. Word has length 8 [2018-06-22 05:44:54,220 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:44:54,221 INFO ]: With dead ends: 10 [2018-06-22 05:44:54,221 INFO ]: Without dead ends: 10 [2018-06-22 05:44:54,222 INFO ]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-06-22 05:44:54,222 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-22 05:44:54,223 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-22 05:44:54,223 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-22 05:44:54,223 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-06-22 05:44:54,223 INFO ]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-06-22 05:44:54,223 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:44:54,223 INFO ]: Abstraction has 10 states and 10 transitions. [2018-06-22 05:44:54,223 INFO ]: Interpolant automaton has 5 states. [2018-06-22 05:44:54,223 INFO ]: Start isEmpty. Operand 10 states and 10 transitions. [2018-06-22 05:44:54,224 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 05:44:54,224 INFO ]: Found error trace [2018-06-22 05:44:54,224 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:44:54,224 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:44:54,224 INFO ]: Analyzing trace with hash -2073468660, now seen corresponding path program 2 times [2018-06-22 05:44:54,224 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:44:54,224 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:44:54,225 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:44:54,225 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:44:54,225 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:44:54,286 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:44:54,683 WARN ]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-06-22 05:44:54,856 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:44:54,856 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:44:54,856 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 05:44:54,863 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 05:44:54,961 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 05:44:54,961 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:44:54,965 INFO ]: Computing forward predicates... [2018-06-22 05:44:55,849 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:44:55,868 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:44:55,868 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-06-22 05:44:55,868 INFO ]: Interpolant automaton has 6 states [2018-06-22 05:44:55,868 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 05:44:55,868 INFO ]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-06-22 05:44:55,869 INFO ]: Start difference. First operand 10 states and 10 transitions. Second operand 6 states. [2018-06-22 05:44:56,168 WARN ]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-06-22 05:44:56,240 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:44:56,240 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-22 05:44:56,241 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 05:44:56,241 INFO ]: Start accepts. Automaton has 6 states. Word has length 9 [2018-06-22 05:44:56,241 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:44:56,241 INFO ]: With dead ends: 11 [2018-06-22 05:44:56,241 INFO ]: Without dead ends: 11 [2018-06-22 05:44:56,242 INFO ]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2018-06-22 05:44:56,242 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-22 05:44:56,244 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-22 05:44:56,245 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-22 05:44:56,245 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-22 05:44:56,245 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-06-22 05:44:56,245 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:44:56,245 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-22 05:44:56,245 INFO ]: Interpolant automaton has 6 states. [2018-06-22 05:44:56,245 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-22 05:44:56,245 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-22 05:44:56,245 INFO ]: Found error trace [2018-06-22 05:44:56,246 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:44:56,246 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:44:56,246 INFO ]: Analyzing trace with hash 145098516, now seen corresponding path program 3 times [2018-06-22 05:44:56,246 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:44:56,246 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:44:56,247 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:44:56,247 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:44:56,247 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:44:56,341 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:44:56,514 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:44:56,514 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:44:56,514 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:44:56,536 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 05:44:56,601 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-22 05:44:56,601 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:44:56,604 INFO ]: Computing forward predicates... [2018-06-22 05:45:03,545 WARN ]: expecting exponential blowup for input size 6 Received shutdown request... [2018-06-22 05:46:05,445 INFO ]: Timeout while computing interpolants [2018-06-22 05:46:05,646 WARN ]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:46:05,646 WARN ]: Verification canceled [2018-06-22 05:46:05,650 WARN ]: Timeout [2018-06-22 05:46:05,650 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 05:46:05 BoogieIcfgContainer [2018-06-22 05:46:05,650 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 05:46:05,651 INFO ]: Toolchain (without parser) took 73129.66 ms. Allocated memory was 302.0 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 250.4 MB in the beginning and 255.4 MB in the end (delta: -5.0 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-22 05:46:05,652 INFO ]: SmtParser took 0.09 ms. Allocated memory is still 302.0 MB. Free memory is still 267.5 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 05:46:05,652 INFO ]: ChcToBoogie took 59.44 ms. Allocated memory is still 302.0 MB. Free memory was 250.4 MB in the beginning and 248.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 05:46:05,653 INFO ]: Boogie Preprocessor took 62.68 ms. Allocated memory is still 302.0 MB. Free memory was 248.4 MB in the beginning and 246.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 05:46:05,653 INFO ]: RCFGBuilder took 326.93 ms. Allocated memory is still 302.0 MB. Free memory was 246.4 MB in the beginning and 234.1 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.3 MB. Max. memory is 3.6 GB. [2018-06-22 05:46:05,654 INFO ]: TraceAbstraction took 72671.41 ms. Allocated memory was 302.0 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 233.1 MB in the beginning and 255.4 MB in the end (delta: -22.3 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-22 05:46:05,657 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.09 ms. Allocated memory is still 302.0 MB. Free memory is still 267.5 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 59.44 ms. Allocated memory is still 302.0 MB. Free memory was 250.4 MB in the beginning and 248.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 62.68 ms. Allocated memory is still 302.0 MB. Free memory was 248.4 MB in the beginning and 246.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 326.93 ms. Allocated memory is still 302.0 MB. Free memory was 246.4 MB in the beginning and 234.1 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.3 MB. Max. memory is 3.6 GB. * TraceAbstraction took 72671.41 ms. Allocated memory was 302.0 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 233.1 MB in the beginning and 255.4 MB in the end (delta: -22.3 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 11 with TraceHistMax 3, while TraceCheckSpWp was constructing forward predicates, while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations, while DnfTransformerHelper was transforming 0 conjuction. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. TIMEOUT Result, 72.5s OverallTime, 4 OverallIterations, 3 TraceHistogramMax, 0.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 21 SDtfs, 2 SDslu, 38 SDs, 0 SdLazy, 17 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred 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, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 41 NumberOfCodeBlocks, 41 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 36 ConstructedInterpolants, 0 QuantifiedInterpolants, 647 SizeOfPredicates, 12 NumberOfNonLiveVariables, 285 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 0/8 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/nest-len.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_05-46-05-674.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/nest-len.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_05-46-05-674.csv Completed graceful shutdown