java -Xss4m -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/sally-chc-benchmarks/lfht/lfht_2_mini_cleaned.lemma2.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-14921ce [2018-06-25 10:19:32,447 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-25 10:19:32,449 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-25 10:19:32,461 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-25 10:19:32,462 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-25 10:19:32,462 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-25 10:19:32,463 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-25 10:19:32,467 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-25 10:19:32,468 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-25 10:19:32,470 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-25 10:19:32,471 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-25 10:19:32,471 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-25 10:19:32,472 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-25 10:19:32,473 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-25 10:19:32,476 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-25 10:19:32,477 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-25 10:19:32,478 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-25 10:19:32,488 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-25 10:19:32,489 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-25 10:19:32,490 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-25 10:19:32,491 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-25 10:19:32,492 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-25 10:19:32,493 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-25 10:19:32,493 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-25 10:19:32,494 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-25 10:19:32,494 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-25 10:19:32,495 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-25 10:19:32,496 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-25 10:19:32,499 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-25 10:19:32,500 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-25 10:19:32,500 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-25 10:19:32,501 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-25 10:19:32,501 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-25 10:19:32,502 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-25 10:19:32,506 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-25 10:19:32,507 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-25 10:19:32,528 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-25 10:19:32,528 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-25 10:19:32,528 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-25 10:19:32,528 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-25 10:19:32,531 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-25 10:19:32,532 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-25 10:19:32,532 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-25 10:19:32,532 INFO L133 SettingsManager]: * Use SBE=true [2018-06-25 10:19:32,532 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-25 10:19:32,532 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-25 10:19:32,533 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-25 10:19:32,533 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-25 10:19:32,533 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-25 10:19:32,533 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-25 10:19:32,533 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-25 10:19:32,533 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-25 10:19:32,534 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-25 10:19:32,535 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-25 10:19:32,535 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-25 10:19:32,535 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-25 10:19:32,535 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-25 10:19:32,536 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-25 10:19:32,537 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-25 10:19:32,579 INFO ]: Repository-Root is: /tmp [2018-06-25 10:19:32,597 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-25 10:19:32,601 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-25 10:19:32,602 INFO ]: Initializing SmtParser... [2018-06-25 10:19:32,603 INFO ]: SmtParser initialized [2018-06-25 10:19:32,603 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/sally-chc-benchmarks/lfht/lfht_2_mini_cleaned.lemma2.smt2 [2018-06-25 10:19:32,605 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 [2018-06-25 10:19:32,695 INFO ]: Executing SMT file /storage/chc-comp/sally-chc-benchmarks/lfht/lfht_2_mini_cleaned.lemma2.smt2 unknown [2018-06-25 10:19:32,988 INFO ]: Succesfully executed SMT file /storage/chc-comp/sally-chc-benchmarks/lfht/lfht_2_mini_cleaned.lemma2.smt2 [2018-06-25 10:19:32,995 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-25 10:19:33,003 INFO ]: Walking toolchain with 4 elements. [2018-06-25 10:19:33,003 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-25 10:19:33,003 INFO ]: Initializing ChcToBoogie... [2018-06-25 10:19:33,004 INFO ]: ChcToBoogie initialized [2018-06-25 10:19:33,008 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 10:19:32" (1/1) ... [2018-06-25 10:19:33,075 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 10:19:33 Unit [2018-06-25 10:19:33,076 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-25 10:19:33,076 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-25 10:19:33,076 INFO ]: Initializing Boogie Preprocessor... [2018-06-25 10:19:33,076 INFO ]: Boogie Preprocessor initialized [2018-06-25 10:19:33,097 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 10:19:33" (1/1) ... [2018-06-25 10:19:33,097 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 10:19:33" (1/1) ... [2018-06-25 10:19:33,104 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 10:19:33" (1/1) ... [2018-06-25 10:19:33,104 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 10:19:33" (1/1) ... [2018-06-25 10:19:33,112 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 10:19:33" (1/1) ... [2018-06-25 10:19:33,113 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 10:19:33" (1/1) ... [2018-06-25 10:19:33,115 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 10:19:33" (1/1) ... [2018-06-25 10:19:33,118 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-25 10:19:33,118 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-25 10:19:33,119 INFO ]: Initializing RCFGBuilder... [2018-06-25 10:19:33,119 INFO ]: RCFGBuilder initialized [2018-06-25 10:19:33,119 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 10:19:33" (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) [2018-06-25 10:19:33,149 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-25 10:19:33,149 INFO ]: Found specification of procedure gotoProc [2018-06-25 10:19:33,149 INFO ]: Found implementation of procedure gotoProc [2018-06-25 10:19:33,149 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-25 10:19:33,149 INFO ]: Found specification of procedure Ultimate.START [2018-06-25 10:19:33,149 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 [2018-06-25 10:19:33,501 INFO ]: Using library mode [2018-06-25 10:19:33,502 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 10:19:33 BoogieIcfgContainer [2018-06-25 10:19:33,502 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-25 10:19:33,507 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-25 10:19:33,507 INFO ]: Initializing TraceAbstraction... [2018-06-25 10:19:33,510 INFO ]: TraceAbstraction initialized [2018-06-25 10:19:33,511 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 10:19:32" (1/3) ... [2018-06-25 10:19:33,511 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ade39cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 25.06 10:19:33, skipping insertion in model container [2018-06-25 10:19:33,512 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 10:19:33" (2/3) ... [2018-06-25 10:19:33,512 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ade39cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.06 10:19:33, skipping insertion in model container [2018-06-25 10:19:33,512 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 10:19:33" (3/3) ... [2018-06-25 10:19:33,514 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-25 10:19:33,523 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-25 10:19:33,531 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-25 10:19:33,578 INFO ]: Using default assertion order modulation [2018-06-25 10:19:33,578 INFO ]: Interprodecural is true [2018-06-25 10:19:33,578 INFO ]: Hoare is false [2018-06-25 10:19:33,579 INFO ]: Compute interpolants for FPandBP [2018-06-25 10:19:33,579 INFO ]: Backedges is TWOTRACK [2018-06-25 10:19:33,579 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-25 10:19:33,579 INFO ]: Difference is false [2018-06-25 10:19:33,579 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-25 10:19:33,579 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-25 10:19:33,594 INFO ]: Start isEmpty. Operand 10 states. [2018-06-25 10:19:33,604 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-25 10:19:33,605 INFO ]: Found error trace [2018-06-25 10:19:33,605 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-25 10:19:33,606 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 10:19:33,611 INFO ]: Analyzing trace with hash 1285054476, now seen corresponding path program 1 times [2018-06-25 10:19:33,613 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 10:19:33,613 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 10:19:33,655 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 10:19:33,655 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 10:19:33,655 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 10:19:33,729 INFO ]: Conjunction of SSA is unsat [2018-06-25 10:19:33,923 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 10:19:33,925 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-25 10:19:33,925 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-25 10:19:33,927 INFO ]: Interpolant automaton has 3 states [2018-06-25 10:19:33,937 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-25 10:19:33,937 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 10:19:33,939 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-25 10:19:34,024 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 10:19:34,024 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-25 10:19:34,027 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-25 10:19:34,028 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-25 10:19:34,028 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 10:19:34,037 INFO ]: With dead ends: 9 [2018-06-25 10:19:34,037 INFO ]: Without dead ends: 9 [2018-06-25 10:19:34,040 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 10:19:34,057 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-25 10:19:34,092 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-25 10:19:34,093 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-25 10:19:34,093 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-25 10:19:34,095 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-25 10:19:34,095 INFO ]: Finished accepts. word is rejected. [2018-06-25 10:19:34,095 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-25 10:19:34,095 INFO ]: Interpolant automaton has 3 states. [2018-06-25 10:19:34,095 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-25 10:19:34,095 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-25 10:19:34,095 INFO ]: Found error trace [2018-06-25 10:19:34,095 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 10:19:34,095 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 10:19:34,096 INFO ]: Analyzing trace with hash 1180100628, now seen corresponding path program 1 times [2018-06-25 10:19:34,096 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 10:19:34,096 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 10:19:34,096 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 10:19:34,096 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 10:19:34,096 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 10:19:34,263 INFO ]: Conjunction of SSA is unsat [2018-06-25 10:19:34,585 WARN ]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-06-25 10:19:35,064 WARN ]: Spent 459.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2018-06-25 10:19:35,065 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 10:19:35,066 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 10:19:35,066 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 [2018-06-25 10:19:35,075 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 10:19:35,138 INFO ]: Conjunction of SSA is unsat [2018-06-25 10:19:35,149 INFO ]: Computing forward predicates... [2018-06-25 10:19:36,105 WARN ]: Spent 822.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown