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_No_Goto.epf -i /storage/chc-comp/vmt-chc-benchmarks/lustre/stalmark.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 19:54:58,956 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 19:54:58,958 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 19:54:58,972 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 19:54:58,973 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 19:54:58,974 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 19:54:58,977 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 19:54:58,978 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 19:54:58,980 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 19:54:58,981 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 19:54:58,982 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 19:54:58,982 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 19:54:58,983 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 19:54:58,984 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 19:54:58,985 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 19:54:58,988 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 19:54:58,989 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 19:54:58,998 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 19:54:59,000 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 19:54:59,001 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 19:54:59,002 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 19:54:59,006 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 19:54:59,006 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 19:54:59,007 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 19:54:59,007 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 19:54:59,008 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 19:54:59,010 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 19:54:59,011 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 19:54:59,012 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 19:54:59,012 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 19:54:59,013 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 19:54:59,013 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 19:54:59,013 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 19:54:59,016 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 19:54:59,017 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 19:54:59,017 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_No_Goto.epf [2018-06-22 19:54:59,030 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 19:54:59,030 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 19:54:59,030 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 19:54:59,030 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 19:54:59,031 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 19:54:59,031 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 19:54:59,033 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 19:54:59,034 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 19:54:59,034 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 19:54:59,034 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 19:54:59,034 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 19:54:59,034 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 19:54:59,034 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 19:54:59,035 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 19:54:59,035 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 19:54:59,035 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 19:54:59,035 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 19:54:59,035 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 19:54:59,035 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 19:54:59,037 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 19:54:59,038 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 19:54:59,086 INFO ]: Repository-Root is: /tmp [2018-06-22 19:54:59,101 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 19:54:59,105 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 19:54:59,106 INFO ]: Initializing SmtParser... [2018-06-22 19:54:59,106 INFO ]: SmtParser initialized [2018-06-22 19:54:59,107 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/stalmark.smt2 [2018-06-22 19:54:59,108 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 19:54:59,205 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/stalmark.smt2 unknown [2018-06-22 19:54:59,440 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/stalmark.smt2 [2018-06-22 19:54:59,444 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 19:54:59,452 INFO ]: Walking toolchain with 4 elements. [2018-06-22 19:54:59,453 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 19:54:59,453 INFO ]: Initializing ChcToBoogie... [2018-06-22 19:54:59,453 INFO ]: ChcToBoogie initialized [2018-06-22 19:54:59,456 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 07:54:59" (1/1) ... [2018-06-22 19:54:59,494 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:54:59 Unit [2018-06-22 19:54:59,494 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 19:54:59,495 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 19:54:59,495 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 19:54:59,495 INFO ]: Boogie Preprocessor initialized [2018-06-22 19:54:59,514 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:54:59" (1/1) ... [2018-06-22 19:54:59,515 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:54:59" (1/1) ... [2018-06-22 19:54:59,522 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:54:59" (1/1) ... [2018-06-22 19:54:59,522 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:54:59" (1/1) ... [2018-06-22 19:54:59,525 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:54:59" (1/1) ... [2018-06-22 19:54:59,526 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:54:59" (1/1) ... [2018-06-22 19:54:59,527 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:54:59" (1/1) ... [2018-06-22 19:54:59,529 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 19:54:59,530 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 19:54:59,530 INFO ]: Initializing RCFGBuilder... [2018-06-22 19:54:59,530 INFO ]: RCFGBuilder initialized [2018-06-22 19:54:59,531 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:54:59" (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 19:54:59,545 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 19:54:59,545 INFO ]: Found specification of procedure False [2018-06-22 19:54:59,545 INFO ]: Found implementation of procedure False [2018-06-22 19:54:59,545 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 19:54:59,545 INFO ]: Found specification of procedure state [2018-06-22 19:54:59,545 INFO ]: Found implementation of procedure state [2018-06-22 19:54:59,545 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 19:54:59,545 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 19:54:59,545 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 19:54:59,753 INFO ]: Using library mode [2018-06-22 19:54:59,754 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 07:54:59 BoogieIcfgContainer [2018-06-22 19:54:59,754 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 19:54:59,755 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 19:54:59,755 INFO ]: Initializing TraceAbstraction... [2018-06-22 19:54:59,764 INFO ]: TraceAbstraction initialized [2018-06-22 19:54:59,765 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 07:54:59" (1/3) ... [2018-06-22 19:54:59,765 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e7c2fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 07:54:59, skipping insertion in model container [2018-06-22 19:54:59,765 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:54:59" (2/3) ... [2018-06-22 19:54:59,766 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e7c2fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 07:54:59, skipping insertion in model container [2018-06-22 19:54:59,766 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 07:54:59" (3/3) ... [2018-06-22 19:54:59,767 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 19:54:59,774 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 19:54:59,781 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 19:54:59,820 INFO ]: Using default assertion order modulation [2018-06-22 19:54:59,820 INFO ]: Interprodecural is true [2018-06-22 19:54:59,820 INFO ]: Hoare is false [2018-06-22 19:54:59,820 INFO ]: Compute interpolants for FPandBP [2018-06-22 19:54:59,820 INFO ]: Backedges is TWOTRACK [2018-06-22 19:54:59,820 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 19:54:59,820 INFO ]: Difference is false [2018-06-22 19:54:59,820 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 19:54:59,820 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 19:54:59,833 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 19:54:59,843 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 19:54:59,843 INFO ]: Found error trace [2018-06-22 19:54:59,844 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:54:59,844 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:54:59,849 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-22 19:54:59,851 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:54:59,852 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:54:59,890 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:54:59,890 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:54:59,890 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:54:59,917 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:55:00,035 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 19:55:00,037 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 19:55:00,037 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 19:55:00,039 INFO ]: Interpolant automaton has 4 states [2018-06-22 19:55:00,055 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 19:55:00,055 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 19:55:00,057 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 19:55:00,121 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:55:00,121 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 19:55:00,121 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 19:55:00,123 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 19:55:00,124 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:55:00,133 INFO ]: With dead ends: 13 [2018-06-22 19:55:00,133 INFO ]: Without dead ends: 13 [2018-06-22 19:55:00,135 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 19:55:00,150 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 19:55:00,180 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 19:55:00,181 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 19:55:00,183 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 19:55:00,185 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 19:55:00,185 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:55:00,185 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 19:55:00,185 INFO ]: Interpolant automaton has 4 states. [2018-06-22 19:55:00,185 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 19:55:00,186 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 19:55:00,186 INFO ]: Found error trace [2018-06-22 19:55:00,186 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:55:00,186 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:55:00,187 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-22 19:55:00,187 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:55:00,187 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:55:00,188 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:55:00,188 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:55:00,188 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:55:00,208 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:55:00,499 WARN ]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2018-06-22 19:55:00,533 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 19:55:00,533 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:55:00,533 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 19:55:00,543 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:55:00,567 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:55:00,577 INFO ]: Computing forward predicates... [2018-06-22 19:55:01,732 WARN ]: Spent 453.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 16 [2018-06-22 19:55:01,846 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 19:55:01,867 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:55:01,867 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-06-22 19:55:01,867 INFO ]: Interpolant automaton has 8 states [2018-06-22 19:55:01,867 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 19:55:01,867 INFO ]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-06-22 19:55:01,868 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2018-06-22 19:55:02,640 WARN ]: Spent 703.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2018-06-22 19:55:02,759 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:55:02,759 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 19:55:02,759 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 19:55:02,759 INFO ]: Start accepts. Automaton has 8 states. Word has length 13 [2018-06-22 19:55:02,760 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:55:02,760 INFO ]: With dead ends: 15 [2018-06-22 19:55:02,760 INFO ]: Without dead ends: 15 [2018-06-22 19:55:02,761 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2018-06-22 19:55:02,761 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 19:55:02,764 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 19:55:02,764 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 19:55:02,764 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 19:55:02,764 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 19:55:02,764 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:55:02,765 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 19:55:02,765 INFO ]: Interpolant automaton has 8 states. [2018-06-22 19:55:02,765 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 19:55:02,765 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 19:55:02,765 INFO ]: Found error trace [2018-06-22 19:55:02,765 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:55:02,765 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:55:02,765 INFO ]: Analyzing trace with hash -1486246934, now seen corresponding path program 2 times [2018-06-22 19:55:02,765 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:55:02,766 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:55:02,766 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:55:02,767 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:55:02,767 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:55:02,795 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:55:03,087 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 19:55:03,087 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:55:03,087 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 19:55:03,097 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 19:55:03,121 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 19:55:03,121 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:55:03,124 INFO ]: Computing forward predicates... [2018-06-22 19:55:03,408 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 19:55:03,430 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:55:03,430 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2018-06-22 19:55:03,430 INFO ]: Interpolant automaton has 12 states [2018-06-22 19:55:03,430 INFO ]: Constructing interpolant automaton starting with 12 interpolants. [2018-06-22 19:55:03,430 INFO ]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2018-06-22 19:55:03,430 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 12 states. [2018-06-22 19:55:03,792 WARN ]: Spent 344.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2018-06-22 19:55:04,053 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:55:04,053 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 19:55:04,058 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 19:55:04,058 INFO ]: Start accepts. Automaton has 12 states. Word has length 17 [2018-06-22 19:55:04,058 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:55:04,059 INFO ]: With dead ends: 17 [2018-06-22 19:55:04,059 INFO ]: Without dead ends: 17 [2018-06-22 19:55:04,059 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2018-06-22 19:55:04,059 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 19:55:04,062 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 19:55:04,062 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 19:55:04,062 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 19:55:04,062 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 19:55:04,063 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:55:04,063 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 19:55:04,063 INFO ]: Interpolant automaton has 12 states. [2018-06-22 19:55:04,063 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 19:55:04,063 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 19:55:04,063 INFO ]: Found error trace [2018-06-22 19:55:04,063 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:55:04,064 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:55:04,066 INFO ]: Analyzing trace with hash -2056434034, now seen corresponding path program 3 times [2018-06-22 19:55:04,066 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:55:04,066 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:55:04,067 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:55:04,067 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 19:55:04,067 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:55:04,090 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:55:04,246 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 19:55:04,246 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:55:04,246 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 19:55:04,261 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 19:55:04,324 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 19:55:04,324 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:55:04,327 INFO ]: Computing forward predicates... [2018-06-22 19:55:04,709 WARN ]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-06-22 19:55:05,099 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 19:55:05,123 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:55:05,124 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2018-06-22 19:55:05,125 INFO ]: Interpolant automaton has 16 states [2018-06-22 19:55:05,125 INFO ]: Constructing interpolant automaton starting with 16 interpolants. [2018-06-22 19:55:05,125 INFO ]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2018-06-22 19:55:05,125 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 16 states. [2018-06-22 19:55:05,489 WARN ]: Spent 299.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2018-06-22 19:55:05,771 WARN ]: Spent 113.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 24 [2018-06-22 19:55:05,855 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:55:05,855 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 19:55:05,855 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 19:55:05,855 INFO ]: Start accepts. Automaton has 16 states. Word has length 21 [2018-06-22 19:55:05,856 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:55:05,856 INFO ]: With dead ends: 17 [2018-06-22 19:55:05,856 INFO ]: Without dead ends: 0 [2018-06-22 19:55:05,856 INFO ]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2018-06-22 19:55:05,856 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-22 19:55:05,856 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-22 19:55:05,856 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-22 19:55:05,856 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-22 19:55:05,856 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2018-06-22 19:55:05,857 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:55:05,857 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-22 19:55:05,857 INFO ]: Interpolant automaton has 16 states. [2018-06-22 19:55:05,857 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-22 19:55:05,857 INFO ]: Finished isEmpty. No accepting run. [2018-06-22 19:55:05,861 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 07:55:05 BoogieIcfgContainer [2018-06-22 19:55:05,861 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 19:55:05,862 INFO ]: Toolchain (without parser) took 6417.08 ms. Allocated memory was 306.2 MB in the beginning and 381.7 MB in the end (delta: 75.5 MB). Free memory was 261.6 MB in the beginning and 316.6 MB in the end (delta: -55.1 MB). Peak memory consumption was 20.4 MB. Max. memory is 3.6 GB. [2018-06-22 19:55:05,863 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 306.2 MB. Free memory is still 271.7 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 19:55:05,863 INFO ]: ChcToBoogie took 41.78 ms. Allocated memory is still 306.2 MB. Free memory was 261.6 MB in the beginning and 259.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 19:55:05,864 INFO ]: Boogie Preprocessor took 34.32 ms. Allocated memory is still 306.2 MB. Free memory was 259.6 MB in the beginning and 257.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 19:55:05,864 INFO ]: RCFGBuilder took 224.12 ms. Allocated memory is still 306.2 MB. Free memory was 257.6 MB in the beginning and 249.5 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 3.6 GB. [2018-06-22 19:55:05,865 INFO ]: TraceAbstraction took 6106.21 ms. Allocated memory was 306.2 MB in the beginning and 381.7 MB in the end (delta: 75.5 MB). Free memory was 249.5 MB in the beginning and 316.6 MB in the end (delta: -67.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 3.6 GB. [2018-06-22 19:55:05,868 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.07 ms. Allocated memory is still 306.2 MB. Free memory is still 271.7 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 41.78 ms. Allocated memory is still 306.2 MB. Free memory was 261.6 MB in the beginning and 259.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 34.32 ms. Allocated memory is still 306.2 MB. Free memory was 259.6 MB in the beginning and 257.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 224.12 ms. Allocated memory is still 306.2 MB. Free memory was 257.6 MB in the beginning and 249.5 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 6106.21 ms. Allocated memory was 306.2 MB in the beginning and 381.7 MB in the end (delta: 75.5 MB). Free memory was 249.5 MB in the beginning and 316.6 MB in the end (delta: -67.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [UNKNOWN] : assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. SAFE Result, 6.0s OverallTime, 4 OverallIterations, 4 TraceHistogramMax, 2.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 44 SDtfs, 38 SDslu, 147 SDs, 0 SdLazy, 136 SolverSat, 52 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 88 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 3.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.2s InterpolantComputationTime, 111 NumberOfCodeBlocks, 111 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 104 ConstructedInterpolants, 0 QuantifiedInterpolants, 11336 SizeOfPredicates, 57 NumberOfNonLiveVariables, 222 ConjunctsInSsa, 81 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 20/68 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/stalmark.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_19-55-05-880.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/stalmark.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_19-55-05-880.csv Received shutdown request...