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_389_e7_358.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-55b8104 [2018-06-18 14:56:02,474 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-18 14:56:02,476 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-18 14:56:02,489 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-18 14:56:02,489 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-18 14:56:02,490 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-18 14:56:02,492 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-18 14:56:02,494 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-18 14:56:02,496 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-18 14:56:02,497 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-18 14:56:02,498 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-18 14:56:02,499 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-18 14:56:02,500 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-18 14:56:02,501 INFO L177 SettingsManager]: ChcToBoogie provides no preferences, ignoring... [2018-06-18 14:56:02,501 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-18 14:56:02,502 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-18 14:56:02,505 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-18 14:56:02,507 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-18 14:56:02,509 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-18 14:56:02,510 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-18 14:56:02,512 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-18 14:56:02,514 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-18 14:56:02,515 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-18 14:56:02,515 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-18 14:56:02,516 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-18 14:56:02,517 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-18 14:56:02,518 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-18 14:56:02,519 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-18 14:56:02,521 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-18 14:56:02,521 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-18 14:56:02,522 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-18 14:56:02,523 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-18 14:56:02,523 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-18 14:56:02,524 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-18 14:56:02,525 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-18 14:56:02,526 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chccomp2018/chcToBoogie_automizer.epf [2018-06-18 14:56:02,544 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-18 14:56:02,545 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-18 14:56:02,545 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-18 14:56:02,545 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-18 14:56:02,547 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-18 14:56:02,547 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-18 14:56:02,547 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-18 14:56:02,548 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-18 14:56:02,548 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-18 14:56:02,548 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-18 14:56:02,548 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-18 14:56:02,549 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-18 14:56:02,549 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-18 14:56:02,549 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-18 14:56:02,549 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-18 14:56:02,549 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-18 14:56:02,550 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-18 14:56:02,551 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-18 14:56:02,556 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-18 14:56:02,611 INFO ]: Repository-Root is: /tmp [2018-06-18 14:56:02,629 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-18 14:56:02,635 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-18 14:56:02,637 INFO ]: Initializing SmtParser... [2018-06-18 14:56:02,637 INFO ]: SmtParser initialized [2018-06-18 14:56:02,638 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/durationThm_1_e3_389_e7_358.smt2 [2018-06-18 14:56:02,639 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 14:56:02,743 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/durationThm_1_e3_389_e7_358.smt2 unknown [2018-06-18 14:56:03,012 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/durationThm_1_e3_389_e7_358.smt2 [2018-06-18 14:56:03,019 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-18 14:56:03,026 INFO ]: Walking toolchain with 4 elements. [2018-06-18 14:56:03,026 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-18 14:56:03,026 INFO ]: Initializing ChcToBoogie... [2018-06-18 14:56:03,026 INFO ]: ChcToBoogie initialized [2018-06-18 14:56:03,034 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 02:56:03" (1/1) ... [2018-06-18 14:56:03,105 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 02:56:03 Unit [2018-06-18 14:56:03,105 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-18 14:56:03,106 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-18 14:56:03,106 INFO ]: Initializing Boogie Preprocessor... [2018-06-18 14:56:03,106 INFO ]: Boogie Preprocessor initialized [2018-06-18 14:56:03,132 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 02:56:03" (1/1) ... [2018-06-18 14:56:03,132 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 02:56:03" (1/1) ... [2018-06-18 14:56:03,139 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 02:56:03" (1/1) ... [2018-06-18 14:56:03,139 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 02:56:03" (1/1) ... [2018-06-18 14:56:03,143 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 02:56:03" (1/1) ... [2018-06-18 14:56:03,144 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 02:56:03" (1/1) ... [2018-06-18 14:56:03,145 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 02:56:03" (1/1) ... [2018-06-18 14:56:03,147 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-18 14:56:03,148 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-18 14:56:03,148 INFO ]: Initializing RCFGBuilder... [2018-06-18 14:56:03,148 INFO ]: RCFGBuilder initialized [2018-06-18 14:56:03,151 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 02:56:03" (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 14:56:03,167 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-18 14:56:03,167 INFO ]: Found specification of procedure False [2018-06-18 14:56:03,168 INFO ]: Found implementation of procedure False [2018-06-18 14:56:03,168 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-18 14:56:03,168 INFO ]: Found specification of procedure state [2018-06-18 14:56:03,168 INFO ]: Found implementation of procedure state [2018-06-18 14:56:03,168 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-18 14:56:03,168 INFO ]: Found specification of procedure Ultimate.START [2018-06-18 14:56:03,168 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 14:56:03,501 INFO ]: Using library mode [2018-06-18 14:56:03,502 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 02:56:03 BoogieIcfgContainer [2018-06-18 14:56:03,502 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-18 14:56:03,504 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-18 14:56:03,504 INFO ]: Initializing TraceAbstraction... [2018-06-18 14:56:03,507 INFO ]: TraceAbstraction initialized [2018-06-18 14:56:03,507 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 02:56:03" (1/3) ... [2018-06-18 14:56:03,508 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25208564 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 18.06 02:56:03, skipping insertion in model container [2018-06-18 14:56:03,508 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 02:56:03" (2/3) ... [2018-06-18 14:56:03,509 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25208564 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.06 02:56:03, skipping insertion in model container [2018-06-18 14:56:03,509 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 02:56:03" (3/3) ... [2018-06-18 14:56:03,511 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-18 14:56:03,521 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-18 14:56:03,529 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-18 14:56:03,578 INFO ]: Using default assertion order modulation [2018-06-18 14:56:03,578 INFO ]: Interprodecural is true [2018-06-18 14:56:03,578 INFO ]: Hoare is false [2018-06-18 14:56:03,579 INFO ]: Compute interpolants for FPandBP [2018-06-18 14:56:03,579 INFO ]: Backedges is TWOTRACK [2018-06-18 14:56:03,579 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-18 14:56:03,579 INFO ]: Difference is false [2018-06-18 14:56:03,579 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-18 14:56:03,579 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-18 14:56:03,602 INFO ]: Start isEmpty. Operand 13 states. [2018-06-18 14:56:03,613 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-18 14:56:03,613 INFO ]: Found error trace [2018-06-18 14:56:03,614 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 14:56:03,615 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 14:56:03,620 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-18 14:56:03,622 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 14:56:03,624 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 14:56:03,667 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 14:56:03,667 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 14:56:03,667 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 14:56:03,723 INFO ]: Conjunction of SSA is unsat [2018-06-18 14:56:03,730 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 14:56:03,848 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-18 14:56:03,851 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-18 14:56:03,851 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-18 14:56:03,853 INFO ]: Interpolant automaton has 4 states [2018-06-18 14:56:03,866 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-18 14:56:03,867 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-18 14:56:03,868 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-18 14:56:03,975 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 14:56:03,975 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-18 14:56:03,975 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-18 14:56:03,977 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-18 14:56:03,977 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 14:56:03,989 INFO ]: With dead ends: 13 [2018-06-18 14:56:03,989 INFO ]: Without dead ends: 13 [2018-06-18 14:56:03,991 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 14:56:04,007 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-18 14:56:04,031 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-18 14:56:04,035 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-18 14:56:04,036 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-18 14:56:04,037 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-18 14:56:04,038 INFO ]: Finished accepts. word is rejected. [2018-06-18 14:56:04,038 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-18 14:56:04,038 INFO ]: Interpolant automaton has 4 states. [2018-06-18 14:56:04,038 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-18 14:56:04,040 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-18 14:56:04,040 INFO ]: Found error trace [2018-06-18 14:56:04,040 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 14:56:04,040 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 14:56:04,040 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-18 14:56:04,040 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 14:56:04,040 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 14:56:04,041 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 14:56:04,041 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 14:56:04,041 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 14:56:04,110 INFO ]: Conjunction of SSA is unsat [2018-06-18 14:56:04,111 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 14:56:04,758 WARN ]: Spent 479.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2018-06-18 14:56:04,902 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 14:56:04,902 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 14:56:04,902 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 14:56:04,912 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 14:56:04,977 INFO ]: Conjunction of SSA is unsat [2018-06-18 14:56:04,991 INFO ]: Computing forward predicates... [2018-06-18 14:56:05,111 WARN ]: expecting exponential blowup for input size 7 [2018-06-18 14:56:05,228 WARN ]: expecting exponential blowup for input size 7 [2018-06-18 14:56:07,922 WARN ]: Spent 547.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 17 [2018-06-18 14:56:08,017 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 14:56:08,046 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 14:56:08,046 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-06-18 14:56:08,046 INFO ]: Interpolant automaton has 7 states [2018-06-18 14:56:08,047 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-18 14:56:08,047 INFO ]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-06-18 14:56:08,047 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 7 states. [2018-06-18 14:56:08,312 WARN ]: Spent 210.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2018-06-18 14:56:08,406 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 14:56:08,406 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-18 14:56:08,408 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-18 14:56:08,408 INFO ]: Start accepts. Automaton has 7 states. Word has length 13 [2018-06-18 14:56:08,409 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 14:56:08,409 INFO ]: With dead ends: 15 [2018-06-18 14:56:08,409 INFO ]: Without dead ends: 15 [2018-06-18 14:56:08,410 INFO ]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-06-18 14:56:08,410 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-18 14:56:08,414 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-18 14:56:08,415 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-18 14:56:08,415 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-18 14:56:08,415 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-18 14:56:08,415 INFO ]: Finished accepts. word is rejected. [2018-06-18 14:56:08,415 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-18 14:56:08,415 INFO ]: Interpolant automaton has 7 states. [2018-06-18 14:56:08,415 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-18 14:56:08,416 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-18 14:56:08,416 INFO ]: Found error trace [2018-06-18 14:56:08,416 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 14:56:08,416 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 14:56:08,416 INFO ]: Analyzing trace with hash -1486246934, now seen corresponding path program 2 times [2018-06-18 14:56:08,417 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 14:56:08,417 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 14:56:08,418 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 14:56:08,418 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 14:56:08,418 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 14:56:08,478 INFO ]: Conjunction of SSA is unsat [2018-06-18 14:56:08,479 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 14:56:08,997 WARN ]: Spent 285.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2018-06-18 14:56:09,130 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-18 14:56:09,131 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 14:56:09,131 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 14:56:09,150 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-18 14:56:09,212 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-18 14:56:09,212 INFO ]: Conjunction of SSA is unsat [2018-06-18 14:56:09,217 INFO ]: Computing forward predicates... [2018-06-18 14:56:09,283 WARN ]: expecting exponential blowup for input size 7 [2018-06-18 14:56:09,307 WARN ]: expecting exponential blowup for input size 7 [2018-06-18 14:56:09,901 WARN ]: Spent 131.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 22 [2018-06-18 14:56:10,318 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-18 14:56:10,344 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 14:56:10,344 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2018-06-18 14:56:10,345 INFO ]: Interpolant automaton has 13 states [2018-06-18 14:56:10,345 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-18 14:56:10,345 INFO ]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2018-06-18 14:56:10,345 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 13 states. [2018-06-18 14:56:10,792 WARN ]: Spent 407.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 79 [2018-06-18 14:56:10,922 WARN ]: Spent 110.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2018-06-18 14:56:11,071 WARN ]: Spent 110.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 41 [2018-06-18 14:56:11,304 WARN ]: Spent 192.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2018-06-18 14:56:11,352 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 14:56:11,352 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-18 14:56:11,354 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-18 14:56:11,354 INFO ]: Start accepts. Automaton has 13 states. Word has length 17 [2018-06-18 14:56:11,354 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 14:56:11,354 INFO ]: With dead ends: 17 [2018-06-18 14:56:11,354 INFO ]: Without dead ends: 17 [2018-06-18 14:56:11,355 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2018-06-18 14:56:11,355 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-18 14:56:11,358 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-18 14:56:11,358 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-18 14:56:11,359 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-18 14:56:11,359 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-18 14:56:11,359 INFO ]: Finished accepts. word is rejected. [2018-06-18 14:56:11,359 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-18 14:56:11,359 INFO ]: Interpolant automaton has 13 states. [2018-06-18 14:56:11,359 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-18 14:56:11,360 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-18 14:56:11,360 INFO ]: Found error trace [2018-06-18 14:56:11,360 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 14:56:11,360 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 14:56:11,360 INFO ]: Analyzing trace with hash -2056434034, now seen corresponding path program 3 times [2018-06-18 14:56:11,360 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 14:56:11,360 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 14:56:11,361 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 14:56:11,361 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 14:56:11,361 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 14:56:11,410 INFO ]: Conjunction of SSA is unsat [2018-06-18 14:56:11,411 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 14:56:11,789 WARN ]: Spent 116.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2018-06-18 14:56:12,077 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-18 14:56:12,077 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 14:56:12,077 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 14:56:12,083 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-18 14:56:12,126 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-18 14:56:12,126 INFO ]: Conjunction of SSA is unsat [2018-06-18 14:56:12,131 INFO ]: Computing forward predicates... [2018-06-18 14:56:12,175 WARN ]: expecting exponential blowup for input size 7 [2018-06-18 14:56:12,189 WARN ]: expecting exponential blowup for input size 7 [2018-06-18 14:56:12,627 WARN ]: Spent 116.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 22 [2018-06-18 14:56:13,406 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-18 14:56:13,427 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 14:56:13,427 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2018-06-18 14:56:13,428 INFO ]: Interpolant automaton has 17 states [2018-06-18 14:56:13,428 INFO ]: Constructing interpolant automaton starting with 17 interpolants. [2018-06-18 14:56:13,428 INFO ]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2018-06-18 14:56:13,428 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 17 states. [2018-06-18 14:56:13,860 WARN ]: Spent 390.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 81 [2018-06-18 14:56:14,342 WARN ]: Spent 290.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 70 [2018-06-18 14:56:14,368 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 14:56:14,377 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-18 14:56:14,377 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-18 14:56:14,377 INFO ]: Start accepts. Automaton has 17 states. Word has length 21 [2018-06-18 14:56:14,377 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 14:56:14,377 INFO ]: With dead ends: 13 [2018-06-18 14:56:14,377 INFO ]: Without dead ends: 0 [2018-06-18 14:56:14,378 INFO ]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2018-06-18 14:56:14,378 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-18 14:56:14,378 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-18 14:56:14,378 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-18 14:56:14,378 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-18 14:56:14,378 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2018-06-18 14:56:14,378 INFO ]: Finished accepts. word is rejected. [2018-06-18 14:56:14,378 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-18 14:56:14,378 INFO ]: Interpolant automaton has 17 states. [2018-06-18 14:56:14,378 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-18 14:56:14,378 INFO ]: Finished isEmpty. No accepting run. [2018-06-18 14:56:14,383 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.06 02:56:14 BoogieIcfgContainer [2018-06-18 14:56:14,383 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-18 14:56:14,383 INFO ]: Toolchain (without parser) took 11363.64 ms. Allocated memory was 308.8 MB in the beginning and 438.8 MB in the end (delta: 130.0 MB). Free memory was 262.2 MB in the beginning and 214.0 MB in the end (delta: 48.2 MB). Peak memory consumption was 178.2 MB. Max. memory is 3.6 GB. [2018-06-18 14:56:14,384 INFO ]: SmtParser took 0.11 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 14:56:14,385 INFO ]: ChcToBoogie took 79.05 ms. Allocated memory is still 308.8 MB. Free memory was 261.2 MB in the beginning and 259.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-18 14:56:14,385 INFO ]: Boogie Preprocessor took 41.49 ms. Allocated memory is still 308.8 MB. Free memory was 259.2 MB in the beginning and 258.2 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. [2018-06-18 14:56:14,386 INFO ]: RCFGBuilder took 354.17 ms. Allocated memory is still 308.8 MB. Free memory was 258.2 MB in the beginning and 247.2 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 3.6 GB. [2018-06-18 14:56:14,386 INFO ]: TraceAbstraction took 10879.11 ms. Allocated memory was 308.8 MB in the beginning and 438.8 MB in the end (delta: 130.0 MB). Free memory was 246.2 MB in the beginning and 214.0 MB in the end (delta: 32.2 MB). Peak memory consumption was 162.2 MB. Max. memory is 3.6 GB. [2018-06-18 14:56:14,390 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.11 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 79.05 ms. Allocated memory is still 308.8 MB. Free memory was 261.2 MB in the beginning and 259.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 41.49 ms. Allocated memory is still 308.8 MB. Free memory was 259.2 MB in the beginning and 258.2 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. * RCFGBuilder took 354.17 ms. Allocated memory is still 308.8 MB. Free memory was 258.2 MB in the beginning and 247.2 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 10879.11 ms. Allocated memory was 308.8 MB in the beginning and 438.8 MB in the end (delta: 130.0 MB). Free memory was 246.2 MB in the beginning and 214.0 MB in the end (delta: 32.2 MB). Peak memory consumption was 162.2 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, 10.8s OverallTime, 4 OverallIterations, 4 TraceHistogramMax, 2.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 40 SDtfs, 27 SDslu, 152 SDs, 0 SdLazy, 130 SolverSat, 46 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 85 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 5.3s 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, 7.6s InterpolantComputationTime, 111 NumberOfCodeBlocks, 111 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 104 ConstructedInterpolants, 0 QuantifiedInterpolants, 28356 SizeOfPredicates, 133 NumberOfNonLiveVariables, 744 ConjunctsInSsa, 172 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/durationThm_1_e3_389_e7_358.smt2_chcToBoogie_automizer.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-18_14-56-14-401.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/durationThm_1_e3_389_e7_358.smt2_chcToBoogie_automizer.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-18_14-56-14-401.csv Received shutdown request...