java -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/chccomp2018/chcToBoogie_automizer.epf -i /storage/chc-comp/sally-chc-benchmarks/lfht/lfht_2_mini_cleaned.lemma2.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-55b8104 [2018-06-18 11:56:17,955 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-18 11:56:17,957 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-18 11:56:17,974 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-18 11:56:17,974 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-18 11:56:17,975 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-18 11:56:17,977 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-18 11:56:17,981 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-18 11:56:17,983 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-18 11:56:17,985 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-18 11:56:17,986 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-18 11:56:17,987 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-18 11:56:17,987 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-18 11:56:17,989 INFO L177 SettingsManager]: ChcToBoogie provides no preferences, ignoring... [2018-06-18 11:56:17,992 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-18 11:56:17,993 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-18 11:56:17,995 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-18 11:56:18,009 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-18 11:56:18,011 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-18 11:56:18,012 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-18 11:56:18,013 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-18 11:56:18,015 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-18 11:56:18,016 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-18 11:56:18,016 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-18 11:56:18,020 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-18 11:56:18,021 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-18 11:56:18,022 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-18 11:56:18,022 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-18 11:56:18,024 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-18 11:56:18,024 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-18 11:56:18,025 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-18 11:56:18,026 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-18 11:56:18,026 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-18 11:56:18,030 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-18 11:56:18,031 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-18 11:56:18,033 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chccomp2018/chcToBoogie_automizer.epf [2018-06-18 11:56:18,056 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-18 11:56:18,056 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-18 11:56:18,056 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-18 11:56:18,057 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-18 11:56:18,058 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-18 11:56:18,058 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-18 11:56:18,059 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-18 11:56:18,059 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-18 11:56:18,059 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-18 11:56:18,059 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-18 11:56:18,059 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-18 11:56:18,060 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-18 11:56:18,060 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-18 11:56:18,060 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-18 11:56:18,060 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-18 11:56:18,060 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-18 11:56:18,060 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-18 11:56:18,065 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-18 11:56:18,065 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-18 11:56:18,112 INFO ]: Repository-Root is: /tmp [2018-06-18 11:56:18,131 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-18 11:56:18,136 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-18 11:56:18,138 INFO ]: Initializing SmtParser... [2018-06-18 11:56:18,138 INFO ]: SmtParser initialized [2018-06-18 11:56:18,139 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/sally-chc-benchmarks/lfht/lfht_2_mini_cleaned.lemma2.smt2 [2018-06-18 11:56:18,141 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 [2018-06-18 11:56:18,242 INFO ]: Executing SMT file /storage/chc-comp/sally-chc-benchmarks/lfht/lfht_2_mini_cleaned.lemma2.smt2 unknown [2018-06-18 11:56:18,625 INFO ]: Succesfully executed SMT file /storage/chc-comp/sally-chc-benchmarks/lfht/lfht_2_mini_cleaned.lemma2.smt2 [2018-06-18 11:56:18,631 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-18 11:56:18,643 INFO ]: Walking toolchain with 4 elements. [2018-06-18 11:56:18,644 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-18 11:56:18,644 INFO ]: Initializing ChcToBoogie... [2018-06-18 11:56:18,644 INFO ]: ChcToBoogie initialized [2018-06-18 11:56:18,654 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 11:56:18" (1/1) ... [2018-06-18 11:56:19,025 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 11:56:19 Unit [2018-06-18 11:56:19,025 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-18 11:56:19,027 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-18 11:56:19,028 INFO ]: Initializing Boogie Preprocessor... [2018-06-18 11:56:19,028 INFO ]: Boogie Preprocessor initialized [2018-06-18 11:56:19,054 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 11:56:19" (1/1) ... [2018-06-18 11:56:19,055 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 11:56:19" (1/1) ... [2018-06-18 11:56:19,088 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 11:56:19" (1/1) ... [2018-06-18 11:56:19,089 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 11:56:19" (1/1) ... [2018-06-18 11:56:19,133 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 11:56:19" (1/1) ... [2018-06-18 11:56:19,134 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 11:56:19" (1/1) ... [2018-06-18 11:56:19,145 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 11:56:19" (1/1) ... [2018-06-18 11:56:19,152 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-18 11:56:19,152 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-18 11:56:19,152 INFO ]: Initializing RCFGBuilder... [2018-06-18 11:56:19,152 INFO ]: RCFGBuilder initialized [2018-06-18 11:56:19,156 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 11:56:19" (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) [2018-06-18 11:56:19,173 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-18 11:56:19,173 INFO ]: Found specification of procedure False [2018-06-18 11:56:19,173 INFO ]: Found implementation of procedure False [2018-06-18 11:56:19,173 INFO ]: Specification and implementation of procedure invariant given in one single declaration [2018-06-18 11:56:19,173 INFO ]: Found specification of procedure invariant [2018-06-18 11:56:19,173 INFO ]: Found implementation of procedure invariant [2018-06-18 11:56:19,173 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-18 11:56:19,173 INFO ]: Found specification of procedure Ultimate.START [2018-06-18 11:56:19,173 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 [2018-06-18 11:56:19,802 INFO ]: Using library mode [2018-06-18 11:56:19,802 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 11:56:19 BoogieIcfgContainer [2018-06-18 11:56:19,803 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-18 11:56:19,804 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-18 11:56:19,804 INFO ]: Initializing TraceAbstraction... [2018-06-18 11:56:19,808 INFO ]: TraceAbstraction initialized [2018-06-18 11:56:19,808 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 11:56:18" (1/3) ... [2018-06-18 11:56:19,809 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21b86af1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 18.06 11:56:19, skipping insertion in model container [2018-06-18 11:56:19,809 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 11:56:19" (2/3) ... [2018-06-18 11:56:19,809 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21b86af1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.06 11:56:19, skipping insertion in model container [2018-06-18 11:56:19,809 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 11:56:19" (3/3) ... [2018-06-18 11:56:19,813 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-18 11:56:19,824 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-18 11:56:19,835 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-18 11:56:19,884 INFO ]: Using default assertion order modulation [2018-06-18 11:56:19,885 INFO ]: Interprodecural is true [2018-06-18 11:56:19,885 INFO ]: Hoare is false [2018-06-18 11:56:19,885 INFO ]: Compute interpolants for FPandBP [2018-06-18 11:56:19,885 INFO ]: Backedges is TWOTRACK [2018-06-18 11:56:19,885 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-18 11:56:19,885 INFO ]: Difference is false [2018-06-18 11:56:19,885 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-18 11:56:19,885 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-18 11:56:19,912 INFO ]: Start isEmpty. Operand 13 states. [2018-06-18 11:56:19,935 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-18 11:56:19,935 INFO ]: Found error trace [2018-06-18 11:56:19,936 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 11:56:19,937 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 11:56:19,943 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-18 11:56:19,945 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 11:56:19,946 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 11:56:20,029 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 11:56:20,029 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 11:56:20,030 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 11:56:20,151 INFO ]: Conjunction of SSA is unsat [2018-06-18 11:56:20,161 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 11:56:20,543 WARN ]: Spent 229.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 19 [2018-06-18 11:56:20,786 WARN ]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-06-18 11:56:20,790 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-18 11:56:20,798 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-18 11:56:20,798 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-18 11:56:20,800 INFO ]: Interpolant automaton has 4 states [2018-06-18 11:56:20,829 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-18 11:56:20,829 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-18 11:56:20,832 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-18 11:56:20,938 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 11:56:20,938 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-18 11:56:20,939 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-18 11:56:20,941 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-18 11:56:20,941 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 11:56:20,952 INFO ]: With dead ends: 13 [2018-06-18 11:56:20,952 INFO ]: Without dead ends: 13 [2018-06-18 11:56:20,953 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-18 11:56:20,977 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-18 11:56:21,003 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-18 11:56:21,005 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-18 11:56:21,005 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-18 11:56:21,006 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-18 11:56:21,006 INFO ]: Finished accepts. word is rejected. [2018-06-18 11:56:21,006 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-18 11:56:21,006 INFO ]: Interpolant automaton has 4 states. [2018-06-18 11:56:21,006 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-18 11:56:21,007 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-18 11:56:21,008 INFO ]: Found error trace [2018-06-18 11:56:21,008 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 11:56:21,008 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 11:56:21,008 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-18 11:56:21,008 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 11:56:21,008 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 11:56:21,009 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 11:56:21,009 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 11:56:21,009 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 11:56:21,261 INFO ]: Conjunction of SSA is unsat [2018-06-18 11:56:21,262 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 11:56:21,683 WARN ]: Spent 197.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2018-06-18 11:56:22,335 WARN ]: Spent 570.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2018-06-18 11:56:22,492 WARN ]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2018-06-18 11:56:22,628 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 11:56:22,629 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 11:56:22,629 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 [2018-06-18 11:56:22,637 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 11:56:22,698 INFO ]: Conjunction of SSA is unsat [2018-06-18 11:56:22,712 INFO ]: Computing forward predicates... [2018-06-18 11:56:23,053 WARN ]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 36 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown