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/vmt-chc-benchmarks/lustre/ex3_e8_120.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-55b8104 [2018-06-18 14:59:00,345 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-18 14:59:00,347 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-18 14:59:00,378 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-18 14:59:00,378 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-18 14:59:00,379 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-18 14:59:00,380 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-18 14:59:00,391 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-18 14:59:00,393 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-18 14:59:00,393 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-18 14:59:00,395 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-18 14:59:00,396 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-18 14:59:00,396 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-18 14:59:00,407 INFO L177 SettingsManager]: ChcToBoogie provides no preferences, ignoring... [2018-06-18 14:59:00,407 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-18 14:59:00,408 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-18 14:59:00,410 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-18 14:59:00,419 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-18 14:59:00,421 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-18 14:59:00,435 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-18 14:59:00,436 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-18 14:59:00,449 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-18 14:59:00,449 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-18 14:59:00,449 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-18 14:59:00,450 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-18 14:59:00,451 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-18 14:59:00,452 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-18 14:59:00,453 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-18 14:59:00,463 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-18 14:59:00,464 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-18 14:59:00,464 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-18 14:59:00,465 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-18 14:59:00,466 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-18 14:59:00,466 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-18 14:59:00,467 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-18 14:59:00,467 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chccomp2018/chcToBoogie_automizer.epf [2018-06-18 14:59:00,509 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-18 14:59:00,510 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-18 14:59:00,510 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-18 14:59:00,510 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-18 14:59:00,511 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-18 14:59:00,518 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-18 14:59:00,518 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-18 14:59:00,518 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-18 14:59:00,518 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-18 14:59:00,519 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-18 14:59:00,519 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-18 14:59:00,519 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-18 14:59:00,519 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-18 14:59:00,519 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-18 14:59:00,520 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-18 14:59:00,520 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-18 14:59:00,520 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-18 14:59:00,522 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-18 14:59:00,523 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-18 14:59:00,610 INFO ]: Repository-Root is: /tmp [2018-06-18 14:59:00,638 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-18 14:59:00,648 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-18 14:59:00,650 INFO ]: Initializing SmtParser... [2018-06-18 14:59:00,651 INFO ]: SmtParser initialized [2018-06-18 14:59:00,651 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/ex3_e8_120.smt2 [2018-06-18 14:59:00,653 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 14:59:00,875 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/ex3_e8_120.smt2 unknown [2018-06-18 14:59:01,262 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/ex3_e8_120.smt2 [2018-06-18 14:59:01,268 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-18 14:59:01,274 INFO ]: Walking toolchain with 4 elements. [2018-06-18 14:59:01,274 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-18 14:59:01,274 INFO ]: Initializing ChcToBoogie... [2018-06-18 14:59:01,275 INFO ]: ChcToBoogie initialized [2018-06-18 14:59:01,282 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 02:59:01" (1/1) ... [2018-06-18 14:59:01,346 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 02:59:01 Unit [2018-06-18 14:59:01,346 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-18 14:59:01,348 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-18 14:59:01,348 INFO ]: Initializing Boogie Preprocessor... [2018-06-18 14:59:01,348 INFO ]: Boogie Preprocessor initialized [2018-06-18 14:59:01,370 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 02:59:01" (1/1) ... [2018-06-18 14:59:01,371 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 02:59:01" (1/1) ... [2018-06-18 14:59:01,380 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 02:59:01" (1/1) ... [2018-06-18 14:59:01,380 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 02:59:01" (1/1) ... [2018-06-18 14:59:01,385 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 02:59:01" (1/1) ... [2018-06-18 14:59:01,392 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 02:59:01" (1/1) ... [2018-06-18 14:59:01,393 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 02:59:01" (1/1) ... [2018-06-18 14:59:01,395 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-18 14:59:01,400 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-18 14:59:01,400 INFO ]: Initializing RCFGBuilder... [2018-06-18 14:59:01,400 INFO ]: RCFGBuilder initialized [2018-06-18 14:59:01,401 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 02:59:01" (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 14:59:01,414 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-18 14:59:01,414 INFO ]: Found specification of procedure False [2018-06-18 14:59:01,414 INFO ]: Found implementation of procedure False [2018-06-18 14:59:01,414 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-18 14:59:01,414 INFO ]: Found specification of procedure state [2018-06-18 14:59:01,414 INFO ]: Found implementation of procedure state [2018-06-18 14:59:01,414 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-18 14:59:01,414 INFO ]: Found specification of procedure Ultimate.START [2018-06-18 14:59:01,414 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 14:59:01,750 INFO ]: Using library mode [2018-06-18 14:59:01,751 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 02:59:01 BoogieIcfgContainer [2018-06-18 14:59:01,751 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-18 14:59:01,752 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-18 14:59:01,752 INFO ]: Initializing TraceAbstraction... [2018-06-18 14:59:01,756 INFO ]: TraceAbstraction initialized [2018-06-18 14:59:01,756 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 02:59:01" (1/3) ... [2018-06-18 14:59:01,757 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c248386 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 18.06 02:59:01, skipping insertion in model container [2018-06-18 14:59:01,757 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 02:59:01" (2/3) ... [2018-06-18 14:59:01,757 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c248386 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.06 02:59:01, skipping insertion in model container [2018-06-18 14:59:01,757 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 02:59:01" (3/3) ... [2018-06-18 14:59:01,764 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-18 14:59:01,774 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-18 14:59:01,788 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-18 14:59:01,830 INFO ]: Using default assertion order modulation [2018-06-18 14:59:01,830 INFO ]: Interprodecural is true [2018-06-18 14:59:01,830 INFO ]: Hoare is false [2018-06-18 14:59:01,830 INFO ]: Compute interpolants for FPandBP [2018-06-18 14:59:01,830 INFO ]: Backedges is TWOTRACK [2018-06-18 14:59:01,830 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-18 14:59:01,830 INFO ]: Difference is false [2018-06-18 14:59:01,830 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-18 14:59:01,830 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-18 14:59:01,849 INFO ]: Start isEmpty. Operand 13 states. [2018-06-18 14:59:01,860 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-18 14:59:01,860 INFO ]: Found error trace [2018-06-18 14:59:01,861 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 14:59:01,861 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 14:59:01,869 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-18 14:59:01,871 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 14:59:01,872 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 14:59:01,916 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 14:59:01,916 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 14:59:01,916 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 14:59:01,973 INFO ]: Conjunction of SSA is unsat [2018-06-18 14:59:01,984 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 14:59:02,086 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-18 14:59:02,089 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-18 14:59:02,089 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-18 14:59:02,091 INFO ]: Interpolant automaton has 4 states [2018-06-18 14:59:02,103 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-18 14:59:02,103 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-18 14:59:02,106 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-18 14:59:02,242 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 14:59:02,242 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-18 14:59:02,243 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-18 14:59:02,245 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-18 14:59:02,245 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 14:59:02,263 INFO ]: With dead ends: 13 [2018-06-18 14:59:02,263 INFO ]: Without dead ends: 13 [2018-06-18 14:59:02,265 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 [2018-06-18 14:59:02,284 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-18 14:59:02,309 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-18 14:59:02,310 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-18 14:59:02,313 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-18 14:59:02,315 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-18 14:59:02,315 INFO ]: Finished accepts. word is rejected. [2018-06-18 14:59:02,315 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-18 14:59:02,315 INFO ]: Interpolant automaton has 4 states. [2018-06-18 14:59:02,315 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-18 14:59:02,317 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-18 14:59:02,317 INFO ]: Found error trace [2018-06-18 14:59:02,317 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 14:59:02,317 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 14:59:02,317 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-18 14:59:02,317 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 14:59:02,317 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 14:59:02,318 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 14:59:02,318 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 14:59:02,318 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 14:59:02,372 INFO ]: Conjunction of SSA is unsat [2018-06-18 14:59:02,373 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 14:59:02,568 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 14:59:02,568 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 14:59:02,568 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 14:59:02,579 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 14:59:02,666 INFO ]: Conjunction of SSA is unsat [2018-06-18 14:59:02,675 INFO ]: Computing forward predicates... [2018-06-18 14:59:03,197 WARN ]: Spent 292.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 3 [2018-06-18 14:59:03,309 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 14:59:03,332 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 14:59:03,333 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-06-18 14:59:03,333 INFO ]: Interpolant automaton has 8 states [2018-06-18 14:59:03,333 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-18 14:59:03,334 INFO ]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-06-18 14:59:03,334 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2018-06-18 14:59:03,657 WARN ]: Spent 124.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 9 [2018-06-18 14:59:03,739 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 14:59:03,739 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-18 14:59:03,740 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-18 14:59:03,741 INFO ]: Start accepts. Automaton has 8 states. Word has length 13 [2018-06-18 14:59:03,741 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 14:59:03,741 INFO ]: With dead ends: 15 [2018-06-18 14:59:03,741 INFO ]: Without dead ends: 15 [2018-06-18 14:59:03,756 INFO ]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-06-18 14:59:03,756 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-18 14:59:03,759 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-18 14:59:03,759 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-18 14:59:03,763 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-18 14:59:03,764 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-18 14:59:03,764 INFO ]: Finished accepts. word is rejected. [2018-06-18 14:59:03,764 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-18 14:59:03,764 INFO ]: Interpolant automaton has 8 states. [2018-06-18 14:59:03,764 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-18 14:59:03,764 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-18 14:59:03,764 INFO ]: Found error trace [2018-06-18 14:59:03,764 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 14:59:03,765 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 14:59:03,765 INFO ]: Analyzing trace with hash -1486246934, now seen corresponding path program 2 times [2018-06-18 14:59:03,765 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 14:59:03,765 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 14:59:03,766 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 14:59:03,766 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 14:59:03,766 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 14:59:03,856 INFO ]: Conjunction of SSA is unsat [2018-06-18 14:59:03,864 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 14:59:04,175 WARN ]: Spent 103.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2018-06-18 14:59:04,487 WARN ]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-06-18 14:59:04,731 WARN ]: Spent 102.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 3 [2018-06-18 14:59:04,733 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-18 14:59:04,733 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 14:59:04,733 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 [2018-06-18 14:59:04,750 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-18 14:59:04,820 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-18 14:59:04,820 INFO ]: Conjunction of SSA is unsat [2018-06-18 14:59:04,824 INFO ]: Computing forward predicates... [2018-06-18 14:59:05,020 WARN ]: expecting exponential blowup for input size 10 [2018-06-18 14:59:08,428 WARN ]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-06-18 14:59:08,468 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-18 14:59:08,494 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 14:59:08,494 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2018-06-18 14:59:08,495 INFO ]: Interpolant automaton has 13 states [2018-06-18 14:59:08,495 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-18 14:59:08,495 INFO ]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2018-06-18 14:59:08,495 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 13 states. [2018-06-18 14:59:08,685 WARN ]: Spent 154.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2018-06-18 14:59:09,002 WARN ]: Spent 114.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2018-06-18 14:59:09,033 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 14:59:09,033 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-18 14:59:09,034 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-18 14:59:09,034 INFO ]: Start accepts. Automaton has 13 states. Word has length 17 [2018-06-18 14:59:09,034 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 14:59:09,035 INFO ]: With dead ends: 17 [2018-06-18 14:59:09,035 INFO ]: Without dead ends: 17 [2018-06-18 14:59:09,035 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2018-06-18 14:59:09,035 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-18 14:59:09,038 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-18 14:59:09,038 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-18 14:59:09,039 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-18 14:59:09,039 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-18 14:59:09,039 INFO ]: Finished accepts. word is rejected. [2018-06-18 14:59:09,039 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-18 14:59:09,039 INFO ]: Interpolant automaton has 13 states. [2018-06-18 14:59:09,039 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-18 14:59:09,040 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-18 14:59:09,040 INFO ]: Found error trace [2018-06-18 14:59:09,040 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 14:59:09,040 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 14:59:09,040 INFO ]: Analyzing trace with hash -2056434034, now seen corresponding path program 3 times [2018-06-18 14:59:09,040 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 14:59:09,040 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 14:59:09,041 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 14:59:09,041 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 14:59:09,041 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 14:59:09,076 INFO ]: Conjunction of SSA is unsat [2018-06-18 14:59:09,077 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 14:59:09,521 WARN ]: Spent 259.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 20 [2018-06-18 14:59:09,588 INFO ]: Checked inductivity of 21 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-06-18 14:59:09,588 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 14:59:09,588 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 [2018-06-18 14:59:09,605 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-18 14:59:09,697 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-18 14:59:09,697 INFO ]: Conjunction of SSA is unsat [2018-06-18 14:59:09,705 INFO ]: Computing forward predicates... [2018-06-18 14:59:09,834 WARN ]: expecting exponential blowup for input size 11 [2018-06-18 14:59:11,391 WARN ]: expecting exponential blowup for input size 6 [2018-06-18 14:59:11,393 WARN ]: expecting exponential blowup for input size 6 [2018-06-18 14:59:11,400 WARN ]: expecting exponential blowup for input size 6 [2018-06-18 14:59:11,406 WARN ]: expecting exponential blowup for input size 6 [2018-06-18 14:59:13,311 WARN ]: Spent 362.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 30 [2018-06-18 14:59:15,025 WARN ]: Spent 1.44 s on a formula simplification. DAG size of input: 127 DAG size of output: 66 [2018-06-18 14:59:15,228 WARN ]: Spent 162.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2018-06-18 14:59:16,620 WARN ]: Spent 687.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 53 [2018-06-18 14:59:16,779 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-18 14:59:16,803 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 14:59:16,804 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 13 [2018-06-18 14:59:16,804 INFO ]: Interpolant automaton has 13 states [2018-06-18 14:59:16,804 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-18 14:59:16,804 INFO ]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2018-06-18 14:59:16,804 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 13 states. [2018-06-18 14:59:17,582 WARN ]: Spent 743.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 105 [2018-06-18 14:59:17,988 WARN ]: Spent 333.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 48 [2018-06-18 14:59:18,727 WARN ]: Spent 682.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 79 [2018-06-18 14:59:19,662 WARN ]: Spent 807.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 102 [2018-06-18 14:59:20,419 WARN ]: Spent 707.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 94 [2018-06-18 14:59:20,431 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 14:59:20,431 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-18 14:59:20,431 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-18 14:59:20,431 INFO ]: Start accepts. Automaton has 13 states. Word has length 21 [2018-06-18 14:59:20,432 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 14:59:20,432 INFO ]: With dead ends: 13 [2018-06-18 14:59:20,432 INFO ]: Without dead ends: 0 [2018-06-18 14:59:20,432 INFO ]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2018-06-18 14:59:20,432 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-18 14:59:20,432 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-18 14:59:20,432 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-18 14:59:20,432 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-18 14:59:20,432 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2018-06-18 14:59:20,432 INFO ]: Finished accepts. word is rejected. [2018-06-18 14:59:20,432 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-18 14:59:20,432 INFO ]: Interpolant automaton has 13 states. [2018-06-18 14:59:20,432 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-18 14:59:20,432 INFO ]: Finished isEmpty. No accepting run. [2018-06-18 14:59:20,436 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.06 02:59:20 BoogieIcfgContainer [2018-06-18 14:59:20,436 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-18 14:59:20,437 INFO ]: Toolchain (without parser) took 19168.71 ms. Allocated memory was 308.8 MB in the beginning and 624.4 MB in the end (delta: 315.6 MB). Free memory was 261.2 MB in the beginning and 576.9 MB in the end (delta: -315.7 MB). There was no memory consumed. Max. memory is 3.6 GB. [2018-06-18 14:59:20,438 INFO ]: SmtParser took 0.08 ms. Allocated memory is still 308.8 MB. Free memory is still 274.3 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-18 14:59:20,438 INFO ]: ChcToBoogie took 73.34 ms. Allocated memory is still 308.8 MB. Free memory was 261.2 MB in the beginning and 258.2 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. [2018-06-18 14:59:20,439 INFO ]: Boogie Preprocessor took 47.16 ms. Allocated memory is still 308.8 MB. Free memory was 258.2 MB in the beginning and 257.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 3.6 GB. [2018-06-18 14:59:20,439 INFO ]: RCFGBuilder took 351.29 ms. Allocated memory is still 308.8 MB. Free memory was 257.1 MB in the beginning and 245.1 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 3.6 GB. [2018-06-18 14:59:20,440 INFO ]: TraceAbstraction took 18684.06 ms. Allocated memory was 308.8 MB in the beginning and 624.4 MB in the end (delta: 315.6 MB). Free memory was 245.1 MB in the beginning and 576.9 MB in the end (delta: -331.8 MB). There was no memory consumed. Max. memory is 3.6 GB. [2018-06-18 14:59:20,442 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.08 ms. Allocated memory is still 308.8 MB. Free memory is still 274.3 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 73.34 ms. Allocated memory is still 308.8 MB. Free memory was 261.2 MB in the beginning and 258.2 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 47.16 ms. Allocated memory is still 308.8 MB. Free memory was 258.2 MB in the beginning and 257.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 3.6 GB. * RCFGBuilder took 351.29 ms. Allocated memory is still 308.8 MB. Free memory was 257.1 MB in the beginning and 245.1 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 3.6 GB. * TraceAbstraction took 18684.06 ms. Allocated memory was 308.8 MB in the beginning and 624.4 MB in the end (delta: 315.6 MB). Free memory was 245.1 MB in the beginning and 576.9 MB in the end (delta: -331.8 MB). There was no memory consumed. 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, 18.6s OverallTime, 4 OverallIterations, 4 TraceHistogramMax, 4.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 41 SDtfs, 36 SDslu, 113 SDs, 0 SdLazy, 101 SolverSat, 47 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 84 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 9.4s 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, 0.3s SatisfiabilityAnalysisTime, 13.0s InterpolantComputationTime, 111 NumberOfCodeBlocks, 111 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 104 ConstructedInterpolants, 0 QuantifiedInterpolants, 40036 SizeOfPredicates, 83 NumberOfNonLiveVariables, 717 ConjunctsInSsa, 105 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 30/68 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/ex3_e8_120.smt2_chcToBoogie_automizer.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-18_14-59-20-453.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ex3_e8_120.smt2_chcToBoogie_automizer.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-18_14-59-20-453.csv Received shutdown request...