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.lemma5e.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-55b8104 [2018-06-18 11:58:46,693 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-18 11:58:46,695 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-18 11:58:46,732 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-18 11:58:46,732 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-18 11:58:46,733 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-18 11:58:46,734 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-18 11:58:46,736 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-18 11:58:46,738 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-18 11:58:46,739 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-18 11:58:46,739 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-18 11:58:46,740 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-18 11:58:46,743 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-18 11:58:46,744 INFO L177 SettingsManager]: ChcToBoogie provides no preferences, ignoring... [2018-06-18 11:58:46,745 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-18 11:58:46,745 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-18 11:58:46,759 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-18 11:58:46,760 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-18 11:58:46,762 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-18 11:58:46,763 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-18 11:58:46,766 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-18 11:58:46,769 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-18 11:58:46,769 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-18 11:58:46,769 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-18 11:58:46,770 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-18 11:58:46,771 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-18 11:58:46,771 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-18 11:58:46,772 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-18 11:58:46,773 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-18 11:58:46,773 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-18 11:58:46,774 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-18 11:58:46,775 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-18 11:58:46,775 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-18 11:58:46,776 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-18 11:58:46,776 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-18 11:58:46,776 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chccomp2018/chcToBoogie_automizer.epf [2018-06-18 11:58:46,792 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-18 11:58:46,792 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-18 11:58:46,793 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-18 11:58:46,793 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-18 11:58:46,794 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-18 11:58:46,794 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-18 11:58:46,795 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-18 11:58:46,795 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-18 11:58:46,795 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-18 11:58:46,795 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-18 11:58:46,795 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-18 11:58:46,796 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-18 11:58:46,796 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-18 11:58:46,796 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-18 11:58:46,796 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-18 11:58:46,796 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-18 11:58:46,797 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-18 11:58:46,798 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-18 11:58:46,798 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-18 11:58:46,872 INFO ]: Repository-Root is: /tmp [2018-06-18 11:58:46,892 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-18 11:58:46,896 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-18 11:58:46,897 INFO ]: Initializing SmtParser... [2018-06-18 11:58:46,898 INFO ]: SmtParser initialized [2018-06-18 11:58:46,898 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/sally-chc-benchmarks/lfht/lfht_2_mini_cleaned.lemma5e.smt2 [2018-06-18 11:58:46,899 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 11:58:47,103 INFO ]: Executing SMT file /storage/chc-comp/sally-chc-benchmarks/lfht/lfht_2_mini_cleaned.lemma5e.smt2 unknown [2018-06-18 11:58:47,589 INFO ]: Succesfully executed SMT file /storage/chc-comp/sally-chc-benchmarks/lfht/lfht_2_mini_cleaned.lemma5e.smt2 [2018-06-18 11:58:47,603 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-18 11:58:47,614 INFO ]: Walking toolchain with 4 elements. [2018-06-18 11:58:47,614 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-18 11:58:47,614 INFO ]: Initializing ChcToBoogie... [2018-06-18 11:58:47,614 INFO ]: ChcToBoogie initialized [2018-06-18 11:58:47,628 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 11:58:47" (1/1) ... [2018-06-18 11:58:48,064 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 11:58:48 Unit [2018-06-18 11:58:48,064 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-18 11:58:48,065 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-18 11:58:48,065 INFO ]: Initializing Boogie Preprocessor... [2018-06-18 11:58:48,065 INFO ]: Boogie Preprocessor initialized [2018-06-18 11:58:48,101 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 11:58:48" (1/1) ... [2018-06-18 11:58:48,101 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 11:58:48" (1/1) ... [2018-06-18 11:58:48,143 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 11:58:48" (1/1) ... [2018-06-18 11:58:48,143 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 11:58:48" (1/1) ... [2018-06-18 11:58:48,179 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 11:58:48" (1/1) ... [2018-06-18 11:58:48,180 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 11:58:48" (1/1) ... [2018-06-18 11:58:48,188 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 11:58:48" (1/1) ... [2018-06-18 11:58:48,196 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-18 11:58:48,196 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-18 11:58:48,196 INFO ]: Initializing RCFGBuilder... [2018-06-18 11:58:48,196 INFO ]: RCFGBuilder initialized [2018-06-18 11:58:48,199 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 11:58:48" (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 11:58:48,216 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-18 11:58:48,216 INFO ]: Found specification of procedure False [2018-06-18 11:58:48,216 INFO ]: Found implementation of procedure False [2018-06-18 11:58:48,216 INFO ]: Specification and implementation of procedure invariant given in one single declaration [2018-06-18 11:58:48,216 INFO ]: Found specification of procedure invariant [2018-06-18 11:58:48,216 INFO ]: Found implementation of procedure invariant [2018-06-18 11:58:48,216 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-18 11:58:48,216 INFO ]: Found specification of procedure Ultimate.START [2018-06-18 11:58:48,216 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 11:58:48,841 INFO ]: Using library mode [2018-06-18 11:58:48,842 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 11:58:48 BoogieIcfgContainer [2018-06-18 11:58:48,842 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-18 11:58:48,844 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-18 11:58:48,844 INFO ]: Initializing TraceAbstraction... [2018-06-18 11:58:48,849 INFO ]: TraceAbstraction initialized [2018-06-18 11:58:48,849 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 11:58:47" (1/3) ... [2018-06-18 11:58:48,850 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@707fe4da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 18.06 11:58:48, skipping insertion in model container [2018-06-18 11:58:48,850 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 11:58:48" (2/3) ... [2018-06-18 11:58:48,850 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@707fe4da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.06 11:58:48, skipping insertion in model container [2018-06-18 11:58:48,850 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 11:58:48" (3/3) ... [2018-06-18 11:58:48,852 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-18 11:58:48,862 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-18 11:58:48,877 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-18 11:58:48,939 INFO ]: Using default assertion order modulation [2018-06-18 11:58:48,940 INFO ]: Interprodecural is true [2018-06-18 11:58:48,940 INFO ]: Hoare is false [2018-06-18 11:58:48,940 INFO ]: Compute interpolants for FPandBP [2018-06-18 11:58:48,940 INFO ]: Backedges is TWOTRACK [2018-06-18 11:58:48,940 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-18 11:58:48,940 INFO ]: Difference is false [2018-06-18 11:58:48,940 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-18 11:58:48,940 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-18 11:58:48,956 INFO ]: Start isEmpty. Operand 13 states. [2018-06-18 11:58:48,989 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-18 11:58:48,994 INFO ]: Found error trace [2018-06-18 11:58:48,995 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 11:58:48,995 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 11:58:49,006 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-18 11:58:49,007 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 11:58:49,009 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 11:58:49,060 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 11:58:49,060 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 11:58:49,060 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 11:58:49,124 INFO ]: Conjunction of SSA is unsat [2018-06-18 11:58:49,136 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 11:58:49,374 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-18 11:58:49,379 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-18 11:58:49,379 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-18 11:58:49,383 INFO ]: Interpolant automaton has 4 states [2018-06-18 11:58:49,402 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-18 11:58:49,403 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-18 11:58:49,405 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-18 11:58:49,568 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 11:58:49,568 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-18 11:58:49,570 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-18 11:58:49,572 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-18 11:58:49,572 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 11:58:49,586 INFO ]: With dead ends: 13 [2018-06-18 11:58:49,586 INFO ]: Without dead ends: 13 [2018-06-18 11:58:49,588 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-18 11:58:49,611 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-18 11:58:49,642 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-18 11:58:49,643 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-18 11:58:49,644 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-18 11:58:49,645 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-18 11:58:49,646 INFO ]: Finished accepts. word is rejected. [2018-06-18 11:58:49,646 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-18 11:58:49,646 INFO ]: Interpolant automaton has 4 states. [2018-06-18 11:58:49,646 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-18 11:58:49,647 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-18 11:58:49,647 INFO ]: Found error trace [2018-06-18 11:58:49,647 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 11:58:49,648 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 11:58:49,648 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-18 11:58:49,648 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 11:58:49,648 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 11:58:49,649 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 11:58:49,649 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 11:58:49,649 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 11:58:49,812 INFO ]: Conjunction of SSA is unsat [2018-06-18 11:58:49,813 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 11:58:50,175 WARN ]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 4 [2018-06-18 11:58:50,559 WARN ]: Spent 329.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 25 [2018-06-18 11:58:50,749 WARN ]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-06-18 11:58:50,798 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 11:58:50,798 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 11:58:50,798 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 11:58:50,807 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 11:58:50,885 INFO ]: Conjunction of SSA is unsat [2018-06-18 11:58:50,898 INFO ]: Computing forward predicates... Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown