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.lemma1.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-14921ce [2018-06-25 10:18:22,871 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-25 10:18:22,878 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-25 10:18:22,891 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-25 10:18:22,891 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-25 10:18:22,892 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-25 10:18:22,893 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-25 10:18:22,895 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-25 10:18:22,897 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-25 10:18:22,897 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-25 10:18:22,898 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-25 10:18:22,898 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-25 10:18:22,899 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-25 10:18:22,900 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-25 10:18:22,901 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-25 10:18:22,902 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-25 10:18:22,907 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-25 10:18:22,909 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-25 10:18:22,911 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-25 10:18:22,912 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-25 10:18:22,913 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-25 10:18:22,916 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-06-25 10:18:22,924 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-25 10:18:22,939 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-25 10:18:22,939 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-25 10:18:22,939 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-25 10:18:22,940 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-25 10:18:22,940 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-25 10:18:22,941 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-25 10:18:22,941 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-25 10:18:22,941 INFO L133 SettingsManager]: * Use SBE=true [2018-06-25 10:18:22,941 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-25 10:18:22,942 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-25 10:18:22,942 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-25 10:18:22,942 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-25 10:18:22,942 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-25 10:18:22,942 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-25 10:18:22,942 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-25 10:18:22,943 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-25 10:18:22,943 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-25 10:18:22,943 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-25 10:18:22,943 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-25 10:18:22,943 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-25 10:18:22,943 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-25 10:18:22,945 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-25 10:18:22,945 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-25 10:18:22,993 INFO ]: Repository-Root is: /tmp [2018-06-25 10:18:23,013 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-25 10:18:23,020 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-25 10:18:23,022 INFO ]: Initializing SmtParser... [2018-06-25 10:18:23,022 INFO ]: SmtParser initialized [2018-06-25 10:18:23,022 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/sally-chc-benchmarks/lfht/lfht_2_mini_cleaned.lemma1.smt2 [2018-06-25 10:18:23,024 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 10:18:23,120 INFO ]: Executing SMT file /storage/chc-comp/sally-chc-benchmarks/lfht/lfht_2_mini_cleaned.lemma1.smt2 unknown [2018-06-25 10:18:23,444 INFO ]: Succesfully executed SMT file /storage/chc-comp/sally-chc-benchmarks/lfht/lfht_2_mini_cleaned.lemma1.smt2 [2018-06-25 10:18:23,450 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-25 10:18:23,457 INFO ]: Walking toolchain with 4 elements. [2018-06-25 10:18:23,457 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-25 10:18:23,458 INFO ]: Initializing ChcToBoogie... [2018-06-25 10:18:23,458 INFO ]: ChcToBoogie initialized [2018-06-25 10:18:23,461 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 10:18:23" (1/1) ... [2018-06-25 10:18:23,526 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 10:18:23 Unit [2018-06-25 10:18:23,526 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-25 10:18:23,527 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-25 10:18:23,527 INFO ]: Initializing Boogie Preprocessor... [2018-06-25 10:18:23,527 INFO ]: Boogie Preprocessor initialized [2018-06-25 10:18:23,546 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 10:18:23" (1/1) ... [2018-06-25 10:18:23,546 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 10:18:23" (1/1) ... [2018-06-25 10:18:23,553 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 10:18:23" (1/1) ... [2018-06-25 10:18:23,553 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 10:18:23" (1/1) ... [2018-06-25 10:18:23,560 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 10:18:23" (1/1) ... [2018-06-25 10:18:23,562 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 10:18:23" (1/1) ... [2018-06-25 10:18:23,564 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 10:18:23" (1/1) ... [2018-06-25 10:18:23,567 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-25 10:18:23,568 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-25 10:18:23,568 INFO ]: Initializing RCFGBuilder... [2018-06-25 10:18:23,568 INFO ]: RCFGBuilder initialized [2018-06-25 10:18:23,569 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 10:18:23" (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 10:18:23,600 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-25 10:18:23,600 INFO ]: Found specification of procedure gotoProc [2018-06-25 10:18:23,600 INFO ]: Found implementation of procedure gotoProc [2018-06-25 10:18:23,600 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-25 10:18:23,600 INFO ]: Found specification of procedure Ultimate.START [2018-06-25 10:18:23,600 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 10:18:23,924 INFO ]: Using library mode [2018-06-25 10:18:23,925 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 10:18:23 BoogieIcfgContainer [2018-06-25 10:18:23,925 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-25 10:18:23,926 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-25 10:18:23,926 INFO ]: Initializing TraceAbstraction... [2018-06-25 10:18:23,930 INFO ]: TraceAbstraction initialized [2018-06-25 10:18:23,930 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 10:18:23" (1/3) ... [2018-06-25 10:18:23,931 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@413bf65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 25.06 10:18:23, skipping insertion in model container [2018-06-25 10:18:23,931 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 10:18:23" (2/3) ... [2018-06-25 10:18:23,932 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@413bf65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.06 10:18:23, skipping insertion in model container [2018-06-25 10:18:23,932 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 10:18:23" (3/3) ... [2018-06-25 10:18:23,934 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-25 10:18:23,941 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-25 10:18:23,949 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-25 10:18:23,999 INFO ]: Using default assertion order modulation [2018-06-25 10:18:23,999 INFO ]: Interprodecural is true [2018-06-25 10:18:23,999 INFO ]: Hoare is false [2018-06-25 10:18:23,999 INFO ]: Compute interpolants for FPandBP [2018-06-25 10:18:23,999 INFO ]: Backedges is TWOTRACK [2018-06-25 10:18:23,999 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-25 10:18:23,999 INFO ]: Difference is false [2018-06-25 10:18:23,999 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-25 10:18:23,999 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-25 10:18:24,011 INFO ]: Start isEmpty. Operand 10 states. [2018-06-25 10:18:24,021 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-25 10:18:24,021 INFO ]: Found error trace [2018-06-25 10:18:24,022 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-25 10:18:24,022 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 10:18:24,025 INFO ]: Analyzing trace with hash 1285054476, now seen corresponding path program 1 times [2018-06-25 10:18:24,027 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 10:18:24,027 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 10:18:24,060 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 10:18:24,060 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 10:18:24,060 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 10:18:24,121 INFO ]: Conjunction of SSA is unsat [2018-06-25 10:18:24,234 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 10:18:24,236 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-25 10:18:24,236 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-25 10:18:24,237 INFO ]: Interpolant automaton has 3 states [2018-06-25 10:18:24,248 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-25 10:18:24,248 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 10:18:24,250 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-25 10:18:24,317 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 10:18:24,318 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-25 10:18:24,318 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-25 10:18:24,320 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-25 10:18:24,320 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 10:18:24,328 INFO ]: With dead ends: 9 [2018-06-25 10:18:24,328 INFO ]: Without dead ends: 9 [2018-06-25 10:18:24,330 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 [2018-06-25 10:18:24,345 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-25 10:18:24,372 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-25 10:18:24,380 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-25 10:18:24,380 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-25 10:18:24,381 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-25 10:18:24,382 INFO ]: Finished accepts. word is rejected. [2018-06-25 10:18:24,382 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-25 10:18:24,382 INFO ]: Interpolant automaton has 3 states. [2018-06-25 10:18:24,382 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-25 10:18:24,382 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-25 10:18:24,382 INFO ]: Found error trace [2018-06-25 10:18:24,382 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 10:18:24,382 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 10:18:24,382 INFO ]: Analyzing trace with hash 1180100628, now seen corresponding path program 1 times [2018-06-25 10:18:24,382 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 10:18:24,382 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 10:18:24,383 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 10:18:24,383 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 10:18:24,383 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 10:18:24,536 INFO ]: Conjunction of SSA is unsat [2018-06-25 10:18:25,108 WARN ]: Spent 298.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2018-06-25 10:18:25,110 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 10:18:25,110 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 10:18:25,110 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 10:18:25,118 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 10:18:25,216 INFO ]: Conjunction of SSA is unsat [2018-06-25 10:18:25,228 INFO ]: Computing forward predicates... Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown