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/sally-chc-benchmarks/lfht/lfht_2_mini_cleaned.lemma4.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 02:39:47,821 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 02:39:47,824 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 02:39:47,836 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 02:39:47,837 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 02:39:47,840 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 02:39:47,842 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 02:39:47,844 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 02:39:47,847 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 02:39:47,847 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 02:39:47,848 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 02:39:47,848 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 02:39:47,849 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 02:39:47,862 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 02:39:47,863 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 02:39:47,864 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 02:39:47,865 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 02:39:47,867 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 02:39:47,868 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 02:39:47,872 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 02:39:47,873 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 02:39:47,875 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 02:39:47,875 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 02:39:47,876 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 02:39:47,880 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 02:39:47,881 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 02:39:47,882 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 02:39:47,882 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 02:39:47,888 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... 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[2018-06-22 02:39:47,892 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 02:39:47,913 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 02:39:47,914 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 02:39:47,916 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 02:39:47,916 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 02:39:47,917 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 02:39:47,917 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 02:39:47,917 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 02:39:47,917 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 02:39:47,918 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 02:39:47,918 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 02:39:47,918 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 02:39:47,918 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 02:39:47,918 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 02:39:47,919 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 02:39:47,921 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 02:39:47,922 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 02:39:47,922 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 02:39:47,926 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 02:39:47,926 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 02:39:47,982 INFO ]: Repository-Root is: /tmp [2018-06-22 02:39:47,999 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 02:39:48,003 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 02:39:48,005 INFO ]: Initializing SmtParser... [2018-06-22 02:39:48,005 INFO ]: SmtParser initialized [2018-06-22 02:39:48,006 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/sally-chc-benchmarks/lfht/lfht_2_mini_cleaned.lemma4.smt2 [2018-06-22 02:39:48,007 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 02:39:48,105 INFO ]: Executing SMT file /storage/chc-comp/sally-chc-benchmarks/lfht/lfht_2_mini_cleaned.lemma4.smt2 unknown [2018-06-22 02:39:48,429 INFO ]: Succesfully executed SMT file /storage/chc-comp/sally-chc-benchmarks/lfht/lfht_2_mini_cleaned.lemma4.smt2 [2018-06-22 02:39:48,433 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 02:39:48,439 INFO ]: Walking toolchain with 4 elements. [2018-06-22 02:39:48,439 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 02:39:48,439 INFO ]: Initializing ChcToBoogie... [2018-06-22 02:39:48,440 INFO ]: ChcToBoogie initialized [2018-06-22 02:39:48,443 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:39:48" (1/1) ... [2018-06-22 02:39:48,511 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:39:48 Unit [2018-06-22 02:39:48,511 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 02:39:48,511 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 02:39:48,512 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 02:39:48,512 INFO ]: Boogie Preprocessor initialized [2018-06-22 02:39:48,533 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:39:48" (1/1) ... [2018-06-22 02:39:48,534 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:39:48" (1/1) ... [2018-06-22 02:39:48,553 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:39:48" (1/1) ... [2018-06-22 02:39:48,553 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:39:48" (1/1) ... [2018-06-22 02:39:48,561 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:39:48" (1/1) ... [2018-06-22 02:39:48,571 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:39:48" (1/1) ... [2018-06-22 02:39:48,574 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:39:48" (1/1) ... [2018-06-22 02:39:48,577 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 02:39:48,577 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 02:39:48,577 INFO ]: Initializing RCFGBuilder... [2018-06-22 02:39:48,577 INFO ]: RCFGBuilder initialized [2018-06-22 02:39:48,578 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:39:48" (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) [2018-06-22 02:39:48,593 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 02:39:48,594 INFO ]: Found specification of procedure gotoProc [2018-06-22 02:39:48,594 INFO ]: Found implementation of procedure gotoProc [2018-06-22 02:39:48,594 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 02:39:48,594 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 02:39:48,594 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 02:39:48,930 INFO ]: Using library mode [2018-06-22 02:39:48,930 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:39:48 BoogieIcfgContainer [2018-06-22 02:39:48,930 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 02:39:48,936 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 02:39:48,936 INFO ]: Initializing TraceAbstraction... [2018-06-22 02:39:48,939 INFO ]: TraceAbstraction initialized [2018-06-22 02:39:48,939 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:39:48" (1/3) ... [2018-06-22 02:39:48,940 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1af29af9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 02:39:48, skipping insertion in model container [2018-06-22 02:39:48,940 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:39:48" (2/3) ... [2018-06-22 02:39:48,940 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1af29af9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 02:39:48, skipping insertion in model container [2018-06-22 02:39:48,940 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:39:48" (3/3) ... [2018-06-22 02:39:48,942 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 02:39:48,953 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 02:39:48,963 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 02:39:49,011 INFO ]: Using default assertion order modulation [2018-06-22 02:39:49,012 INFO ]: Interprodecural is true [2018-06-22 02:39:49,012 INFO ]: Hoare is false [2018-06-22 02:39:49,012 INFO ]: Compute interpolants for FPandBP [2018-06-22 02:39:49,012 INFO ]: Backedges is TWOTRACK [2018-06-22 02:39:49,012 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 02:39:49,012 INFO ]: Difference is false [2018-06-22 02:39:49,012 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 02:39:49,012 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 02:39:49,025 INFO ]: Start isEmpty. Operand 10 states. [2018-06-22 02:39:49,042 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-22 02:39:49,042 INFO ]: Found error trace [2018-06-22 02:39:49,043 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-22 02:39:49,043 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 02:39:49,049 INFO ]: Analyzing trace with hash 1284994894, now seen corresponding path program 1 times [2018-06-22 02:39:49,050 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 02:39:49,051 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 02:39:49,087 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:39:49,087 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 02:39:49,087 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:39:49,150 INFO ]: Conjunction of SSA is unsat [2018-06-22 02:39:49,338 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 02:39:49,341 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 02:39:49,341 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 02:39:49,344 INFO ]: Interpolant automaton has 3 states [2018-06-22 02:39:49,360 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 02:39:49,361 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 02:39:49,363 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-22 02:39:49,439 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 02:39:49,439 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-22 02:39:49,444 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 02:39:49,445 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-22 02:39:49,446 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 02:39:49,455 INFO ]: With dead ends: 9 [2018-06-22 02:39:49,455 INFO ]: Without dead ends: 9 [2018-06-22 02:39:49,457 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 [2018-06-22 02:39:49,486 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-22 02:39:49,526 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-22 02:39:49,527 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-22 02:39:49,528 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-22 02:39:49,529 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-22 02:39:49,530 INFO ]: Finished accepts. word is rejected. [2018-06-22 02:39:49,530 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-22 02:39:49,530 INFO ]: Interpolant automaton has 3 states. [2018-06-22 02:39:49,530 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-22 02:39:49,530 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 02:39:49,530 INFO ]: Found error trace [2018-06-22 02:39:49,530 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 02:39:49,530 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 02:39:49,531 INFO ]: Analyzing trace with hash 1180964567, now seen corresponding path program 1 times [2018-06-22 02:39:49,531 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 02:39:49,531 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 02:39:49,532 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:39:49,532 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 02:39:49,532 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:39:49,718 INFO ]: Conjunction of SSA is unsat [2018-06-22 02:39:50,459 WARN ]: Spent 463.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2018-06-22 02:39:50,461 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 02:39:50,461 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 02:39:50,461 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 02:39:50,472 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 02:39:50,575 INFO ]: Conjunction of SSA is unsat [2018-06-22 02:39:50,588 INFO ]: Computing forward predicates... Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown