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/durationThm_1_e3_173.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-55b8104 [2018-06-18 14:55:42,417 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-18 14:55:42,419 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-18 14:55:42,433 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-18 14:55:42,434 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-18 14:55:42,435 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-18 14:55:42,436 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-18 14:55:42,440 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-18 14:55:42,443 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-18 14:55:42,444 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-18 14:55:42,444 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-18 14:55:42,445 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-18 14:55:42,447 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-18 14:55:42,448 INFO L177 SettingsManager]: ChcToBoogie provides no preferences, ignoring... [2018-06-18 14:55:42,448 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-18 14:55:42,449 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-18 14:55:42,458 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-18 14:55:42,460 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-18 14:55:42,461 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-18 14:55:42,462 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-18 14:55:42,467 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-18 14:55:42,471 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-18 14:55:42,471 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-18 14:55:42,471 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-18 14:55:42,472 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-18 14:55:42,473 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-18 14:55:42,473 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-18 14:55:42,476 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-18 14:55:42,477 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-18 14:55:42,477 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-18 14:55:42,478 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-18 14:55:42,479 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-18 14:55:42,479 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-18 14:55:42,480 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-18 14:55:42,485 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-18 14:55:42,485 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chccomp2018/chcToBoogie_automizer.epf [2018-06-18 14:55:42,510 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-18 14:55:42,510 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-18 14:55:42,510 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-18 14:55:42,511 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-18 14:55:42,513 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-18 14:55:42,513 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-18 14:55:42,513 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-18 14:55:42,513 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-18 14:55:42,513 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-18 14:55:42,514 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-18 14:55:42,514 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-18 14:55:42,514 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-18 14:55:42,514 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-18 14:55:42,514 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-18 14:55:42,515 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-18 14:55:42,515 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-18 14:55:42,515 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-18 14:55:42,519 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-18 14:55:42,520 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-18 14:55:42,568 INFO ]: Repository-Root is: /tmp [2018-06-18 14:55:42,584 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-18 14:55:42,591 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-18 14:55:42,592 INFO ]: Initializing SmtParser... [2018-06-18 14:55:42,592 INFO ]: SmtParser initialized [2018-06-18 14:55:42,593 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/durationThm_1_e3_173.smt2 [2018-06-18 14:55:42,594 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 14:55:42,697 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/durationThm_1_e3_173.smt2 unknown [2018-06-18 14:55:42,938 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/durationThm_1_e3_173.smt2 [2018-06-18 14:55:42,943 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-18 14:55:42,948 INFO ]: Walking toolchain with 4 elements. [2018-06-18 14:55:42,948 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-18 14:55:42,949 INFO ]: Initializing ChcToBoogie... [2018-06-18 14:55:42,949 INFO ]: ChcToBoogie initialized [2018-06-18 14:55:42,956 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 02:55:42" (1/1) ... [2018-06-18 14:55:43,023 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 02:55:43 Unit [2018-06-18 14:55:43,023 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-18 14:55:43,024 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-18 14:55:43,024 INFO ]: Initializing Boogie Preprocessor... [2018-06-18 14:55:43,024 INFO ]: Boogie Preprocessor initialized [2018-06-18 14:55:43,049 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 02:55:43" (1/1) ... [2018-06-18 14:55:43,050 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 02:55:43" (1/1) ... [2018-06-18 14:55:43,060 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 02:55:43" (1/1) ... [2018-06-18 14:55:43,060 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 02:55:43" (1/1) ... [2018-06-18 14:55:43,072 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 02:55:43" (1/1) ... [2018-06-18 14:55:43,073 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 02:55:43" (1/1) ... [2018-06-18 14:55:43,074 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 02:55:43" (1/1) ... [2018-06-18 14:55:43,076 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-18 14:55:43,076 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-18 14:55:43,077 INFO ]: Initializing RCFGBuilder... [2018-06-18 14:55:43,077 INFO ]: RCFGBuilder initialized [2018-06-18 14:55:43,077 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 02:55:43" (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 14:55:43,098 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-18 14:55:43,098 INFO ]: Found specification of procedure False [2018-06-18 14:55:43,098 INFO ]: Found implementation of procedure False [2018-06-18 14:55:43,098 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-18 14:55:43,098 INFO ]: Found specification of procedure state [2018-06-18 14:55:43,098 INFO ]: Found implementation of procedure state [2018-06-18 14:55:43,098 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-18 14:55:43,098 INFO ]: Found specification of procedure Ultimate.START [2018-06-18 14:55:43,098 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 14:55:43,479 INFO ]: Using library mode [2018-06-18 14:55:43,487 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 02:55:43 BoogieIcfgContainer [2018-06-18 14:55:43,488 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-18 14:55:43,489 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-18 14:55:43,489 INFO ]: Initializing TraceAbstraction... [2018-06-18 14:55:43,492 INFO ]: TraceAbstraction initialized [2018-06-18 14:55:43,493 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 02:55:42" (1/3) ... [2018-06-18 14:55:43,494 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21063cdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 18.06 02:55:43, skipping insertion in model container [2018-06-18 14:55:43,494 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 02:55:43" (2/3) ... [2018-06-18 14:55:43,494 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21063cdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.06 02:55:43, skipping insertion in model container [2018-06-18 14:55:43,494 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 02:55:43" (3/3) ... [2018-06-18 14:55:43,497 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-18 14:55:43,508 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-18 14:55:43,519 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-18 14:55:43,568 INFO ]: Using default assertion order modulation [2018-06-18 14:55:43,568 INFO ]: Interprodecural is true [2018-06-18 14:55:43,568 INFO ]: Hoare is false [2018-06-18 14:55:43,568 INFO ]: Compute interpolants for FPandBP [2018-06-18 14:55:43,568 INFO ]: Backedges is TWOTRACK [2018-06-18 14:55:43,568 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-18 14:55:43,569 INFO ]: Difference is false [2018-06-18 14:55:43,569 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-18 14:55:43,569 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-18 14:55:43,585 INFO ]: Start isEmpty. Operand 13 states. [2018-06-18 14:55:43,597 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-18 14:55:43,597 INFO ]: Found error trace [2018-06-18 14:55:43,598 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 14:55:43,598 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 14:55:43,602 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-18 14:55:43,604 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 14:55:43,604 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 14:55:43,642 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 14:55:43,642 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 14:55:43,642 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 14:55:43,701 INFO ]: Conjunction of SSA is unsat [2018-06-18 14:55:43,711 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 14:55:43,810 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-18 14:55:43,812 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-18 14:55:43,812 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-18 14:55:43,815 INFO ]: Interpolant automaton has 4 states [2018-06-18 14:55:43,831 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-18 14:55:43,831 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-18 14:55:43,833 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-18 14:55:43,950 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 14:55:43,950 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-18 14:55:43,956 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-18 14:55:43,958 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-18 14:55:43,958 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 14:55:43,973 INFO ]: With dead ends: 13 [2018-06-18 14:55:43,973 INFO ]: Without dead ends: 13 [2018-06-18 14:55:43,974 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 14:55:43,988 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-18 14:55:44,012 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-18 14:55:44,014 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-18 14:55:44,015 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-18 14:55:44,016 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-18 14:55:44,016 INFO ]: Finished accepts. word is rejected. [2018-06-18 14:55:44,016 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-18 14:55:44,016 INFO ]: Interpolant automaton has 4 states. [2018-06-18 14:55:44,016 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-18 14:55:44,018 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-18 14:55:44,018 INFO ]: Found error trace [2018-06-18 14:55:44,018 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 14:55:44,018 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 14:55:44,018 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-18 14:55:44,018 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 14:55:44,018 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 14:55:44,019 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 14:55:44,019 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 14:55:44,019 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 14:55:44,100 INFO ]: Conjunction of SSA is unsat [2018-06-18 14:55:44,101 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 14:55:44,533 WARN ]: Spent 268.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 22 [2018-06-18 14:55:44,742 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 14:55:44,742 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 14:55:44,742 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 14:55:44,750 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 14:55:44,817 INFO ]: Conjunction of SSA is unsat [2018-06-18 14:55:44,830 INFO ]: Computing forward predicates... [2018-06-18 14:55:45,378 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 14:55:45,416 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 14:55:45,416 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-06-18 14:55:45,417 INFO ]: Interpolant automaton has 8 states [2018-06-18 14:55:45,417 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-18 14:55:45,417 INFO ]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-06-18 14:55:45,417 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2018-06-18 14:55:45,786 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 14:55:45,786 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-18 14:55:45,787 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-18 14:55:45,787 INFO ]: Start accepts. Automaton has 8 states. Word has length 13 [2018-06-18 14:55:45,787 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 14:55:45,788 INFO ]: With dead ends: 15 [2018-06-18 14:55:45,788 INFO ]: Without dead ends: 15 [2018-06-18 14:55:45,789 INFO ]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-06-18 14:55:45,789 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-18 14:55:45,791 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-18 14:55:45,791 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-18 14:55:45,793 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-18 14:55:45,793 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-18 14:55:45,793 INFO ]: Finished accepts. word is rejected. [2018-06-18 14:55:45,793 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-18 14:55:45,793 INFO ]: Interpolant automaton has 8 states. [2018-06-18 14:55:45,793 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-18 14:55:45,794 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-18 14:55:45,794 INFO ]: Found error trace [2018-06-18 14:55:45,794 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 14:55:45,794 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 14:55:45,794 INFO ]: Analyzing trace with hash -1486246934, now seen corresponding path program 2 times [2018-06-18 14:55:45,794 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 14:55:45,794 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 14:55:45,795 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 14:55:45,795 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 14:55:45,795 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 14:55:45,877 INFO ]: Conjunction of SSA is unsat [2018-06-18 14:55:45,878 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 14:55:46,652 WARN ]: Spent 479.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2018-06-18 14:55:46,821 WARN ]: Spent 141.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 6 [2018-06-18 14:55:47,024 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-18 14:55:47,024 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 14:55:47,024 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 14:55:47,049 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-18 14:55:47,124 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-18 14:55:47,124 INFO ]: Conjunction of SSA is unsat [2018-06-18 14:55:47,128 INFO ]: Computing forward predicates... [2018-06-18 14:55:47,786 WARN ]: Spent 148.00 ms on a formula simplification. DAG size of input: 7 DAG size of output: 5 [2018-06-18 14:55:47,862 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-18 14:55:47,891 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 14:55:47,892 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2018-06-18 14:55:47,893 INFO ]: Interpolant automaton has 12 states [2018-06-18 14:55:47,893 INFO ]: Constructing interpolant automaton starting with 12 interpolants. [2018-06-18 14:55:47,894 INFO ]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2018-06-18 14:55:47,894 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 12 states. [2018-06-18 14:55:48,131 WARN ]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2018-06-18 14:55:48,460 WARN ]: Spent 143.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2018-06-18 14:55:48,576 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 14:55:48,576 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-18 14:55:48,577 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-18 14:55:48,577 INFO ]: Start accepts. Automaton has 12 states. Word has length 17 [2018-06-18 14:55:48,577 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 14:55:48,577 INFO ]: With dead ends: 17 [2018-06-18 14:55:48,578 INFO ]: Without dead ends: 17 [2018-06-18 14:55:48,578 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2018-06-18 14:55:48,578 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-18 14:55:48,581 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-18 14:55:48,581 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-18 14:55:48,582 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-18 14:55:48,582 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-18 14:55:48,582 INFO ]: Finished accepts. word is rejected. [2018-06-18 14:55:48,582 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-18 14:55:48,582 INFO ]: Interpolant automaton has 12 states. [2018-06-18 14:55:48,582 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-18 14:55:48,583 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-18 14:55:48,583 INFO ]: Found error trace [2018-06-18 14:55:48,583 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 14:55:48,583 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 14:55:48,583 INFO ]: Analyzing trace with hash -2056434034, now seen corresponding path program 3 times [2018-06-18 14:55:48,583 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 14:55:48,583 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 14:55:48,584 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 14:55:48,584 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 14:55:48,584 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 14:55:48,620 INFO ]: Conjunction of SSA is unsat [2018-06-18 14:55:48,621 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 14:55:48,858 INFO ]: Checked inductivity of 21 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-06-18 14:55:48,859 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 14:55:48,859 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) [2018-06-18 14:55:48,873 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-18 14:55:48,983 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-18 14:55:48,994 INFO ]: Conjunction of SSA is unsat [2018-06-18 14:55:48,999 INFO ]: Computing forward predicates... [2018-06-18 14:55:50,134 INFO ]: Checked inductivity of 21 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-06-18 14:55:50,172 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 14:55:50,172 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2018-06-18 14:55:50,172 INFO ]: Interpolant automaton has 14 states [2018-06-18 14:55:50,172 INFO ]: Constructing interpolant automaton starting with 14 interpolants. [2018-06-18 14:55:50,173 INFO ]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2018-06-18 14:55:50,173 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 14 states. [2018-06-18 14:55:50,756 WARN ]: Spent 298.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2018-06-18 14:55:50,877 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 14:55:50,877 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-18 14:55:50,878 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-18 14:55:50,878 INFO ]: Start accepts. Automaton has 14 states. Word has length 21 [2018-06-18 14:55:50,878 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 14:55:50,878 INFO ]: With dead ends: 13 [2018-06-18 14:55:50,879 INFO ]: Without dead ends: 0 [2018-06-18 14:55:50,879 INFO ]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2018-06-18 14:55:50,879 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-18 14:55:50,879 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-18 14:55:50,879 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-18 14:55:50,879 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-18 14:55:50,879 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2018-06-18 14:55:50,879 INFO ]: Finished accepts. word is rejected. [2018-06-18 14:55:50,879 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-18 14:55:50,879 INFO ]: Interpolant automaton has 14 states. [2018-06-18 14:55:50,879 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-18 14:55:50,879 INFO ]: Finished isEmpty. No accepting run. [2018-06-18 14:55:50,886 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.06 02:55:50 BoogieIcfgContainer [2018-06-18 14:55:50,886 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-18 14:55:50,887 INFO ]: Toolchain (without parser) took 7943.31 ms. Allocated memory was 299.9 MB in the beginning and 344.5 MB in the end (delta: 44.6 MB). Free memory was 252.3 MB in the beginning and 213.4 MB in the end (delta: 38.9 MB). Peak memory consumption was 83.5 MB. Max. memory is 3.6 GB. [2018-06-18 14:55:50,888 INFO ]: SmtParser took 0.08 ms. Allocated memory is still 299.9 MB. Free memory is still 264.4 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-18 14:55:50,888 INFO ]: ChcToBoogie took 74.97 ms. Allocated memory is still 299.9 MB. Free memory was 252.3 MB in the beginning and 250.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-18 14:55:50,893 INFO ]: Boogie Preprocessor took 52.15 ms. Allocated memory is still 299.9 MB. Free memory was 250.3 MB in the beginning and 248.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-18 14:55:50,893 INFO ]: RCFGBuilder took 411.07 ms. Allocated memory is still 299.9 MB. Free memory was 248.3 MB in the beginning and 238.3 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 3.6 GB. [2018-06-18 14:55:50,894 INFO ]: TraceAbstraction took 7396.87 ms. Allocated memory was 299.9 MB in the beginning and 344.5 MB in the end (delta: 44.6 MB). Free memory was 236.3 MB in the beginning and 213.4 MB in the end (delta: 23.0 MB). Peak memory consumption was 67.5 MB. Max. memory is 3.6 GB. [2018-06-18 14:55:50,900 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 299.9 MB. Free memory is still 264.4 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 74.97 ms. Allocated memory is still 299.9 MB. Free memory was 252.3 MB in the beginning and 250.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 52.15 ms. Allocated memory is still 299.9 MB. Free memory was 250.3 MB in the beginning and 248.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 411.07 ms. Allocated memory is still 299.9 MB. Free memory was 248.3 MB in the beginning and 238.3 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 7396.87 ms. Allocated memory was 299.9 MB in the beginning and 344.5 MB in the end (delta: 44.6 MB). Free memory was 236.3 MB in the beginning and 213.4 MB in the end (delta: 23.0 MB). Peak memory consumption was 67.5 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, 7.3s OverallTime, 4 OverallIterations, 4 TraceHistogramMax, 1.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 40 SDtfs, 31 SDslu, 123 SDs, 0 SdLazy, 102 SolverSat, 40 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 85 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 4.1s 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, 0.4s SatisfiabilityAnalysisTime, 4.5s InterpolantComputationTime, 111 NumberOfCodeBlocks, 111 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 104 ConstructedInterpolants, 0 QuantifiedInterpolants, 6776 SizeOfPredicates, 66 NumberOfNonLiveVariables, 744 ConjunctsInSsa, 57 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 24/68 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/durationThm_1_e3_173.smt2_chcToBoogie_automizer.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-18_14-55-50-919.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/durationThm_1_e3_173.smt2_chcToBoogie_automizer.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-18_14-55-50-919.csv Received shutdown request...