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_3_e3_442_e5_260.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-55b8104 [2018-06-18 14:58:11,205 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-18 14:58:11,207 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-18 14:58:11,222 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-18 14:58:11,223 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-18 14:58:11,226 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-18 14:58:11,227 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-18 14:58:11,229 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-18 14:58:11,231 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-18 14:58:11,233 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-18 14:58:11,234 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-18 14:58:11,234 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-18 14:58:11,235 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-18 14:58:11,238 INFO L177 SettingsManager]: ChcToBoogie provides no preferences, ignoring... [2018-06-18 14:58:11,239 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-18 14:58:11,240 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-18 14:58:11,241 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-18 14:58:11,252 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-18 14:58:11,253 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-18 14:58:11,254 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-18 14:58:11,255 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-18 14:58:11,259 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-18 14:58:11,260 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-18 14:58:11,260 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-18 14:58:11,261 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-18 14:58:11,262 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-18 14:58:11,265 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-18 14:58:11,266 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-18 14:58:11,267 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-18 14:58:11,267 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-18 14:58:11,271 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-18 14:58:11,272 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-18 14:58:11,272 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-18 14:58:11,273 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-18 14:58:11,273 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-18 14:58:11,275 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chccomp2018/chcToBoogie_automizer.epf [2018-06-18 14:58:11,298 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-18 14:58:11,298 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-18 14:58:11,299 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-18 14:58:11,299 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-18 14:58:11,303 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-18 14:58:11,303 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-18 14:58:11,303 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-18 14:58:11,304 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-18 14:58:11,304 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-18 14:58:11,304 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-18 14:58:11,304 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-18 14:58:11,304 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-18 14:58:11,305 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-18 14:58:11,305 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-18 14:58:11,305 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-18 14:58:11,305 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-18 14:58:11,305 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-18 14:58:11,307 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-18 14:58:11,308 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-18 14:58:11,354 INFO ]: Repository-Root is: /tmp [2018-06-18 14:58:11,371 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-18 14:58:11,375 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-18 14:58:11,377 INFO ]: Initializing SmtParser... [2018-06-18 14:58:11,377 INFO ]: SmtParser initialized [2018-06-18 14:58:11,378 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/durationThm_3_e3_442_e5_260.smt2 [2018-06-18 14:58:11,379 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 14:58:11,463 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/durationThm_3_e3_442_e5_260.smt2 unknown [2018-06-18 14:58:11,742 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/durationThm_3_e3_442_e5_260.smt2 [2018-06-18 14:58:11,747 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-18 14:58:11,755 INFO ]: Walking toolchain with 4 elements. [2018-06-18 14:58:11,756 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-18 14:58:11,756 INFO ]: Initializing ChcToBoogie... [2018-06-18 14:58:11,756 INFO ]: ChcToBoogie initialized [2018-06-18 14:58:11,763 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 02:58:11" (1/1) ... [2018-06-18 14:58:11,824 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 02:58:11 Unit [2018-06-18 14:58:11,824 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-18 14:58:11,825 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-18 14:58:11,825 INFO ]: Initializing Boogie Preprocessor... [2018-06-18 14:58:11,825 INFO ]: Boogie Preprocessor initialized [2018-06-18 14:58:11,850 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 02:58:11" (1/1) ... [2018-06-18 14:58:11,850 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 02:58:11" (1/1) ... [2018-06-18 14:58:11,859 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 02:58:11" (1/1) ... [2018-06-18 14:58:11,859 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 02:58:11" (1/1) ... [2018-06-18 14:58:11,863 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 02:58:11" (1/1) ... [2018-06-18 14:58:11,864 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 02:58:11" (1/1) ... [2018-06-18 14:58:11,866 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 02:58:11" (1/1) ... [2018-06-18 14:58:11,868 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-18 14:58:11,868 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-18 14:58:11,868 INFO ]: Initializing RCFGBuilder... [2018-06-18 14:58:11,868 INFO ]: RCFGBuilder initialized [2018-06-18 14:58:11,869 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 02:58:11" (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 14:58:11,893 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-18 14:58:11,894 INFO ]: Found specification of procedure False [2018-06-18 14:58:11,894 INFO ]: Found implementation of procedure False [2018-06-18 14:58:11,894 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-18 14:58:11,894 INFO ]: Found specification of procedure state [2018-06-18 14:58:11,894 INFO ]: Found implementation of procedure state [2018-06-18 14:58:11,894 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-18 14:58:11,894 INFO ]: Found specification of procedure Ultimate.START [2018-06-18 14:58:11,894 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 14:58:12,349 INFO ]: Using library mode [2018-06-18 14:58:12,350 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 02:58:12 BoogieIcfgContainer [2018-06-18 14:58:12,350 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-18 14:58:12,351 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-18 14:58:12,351 INFO ]: Initializing TraceAbstraction... [2018-06-18 14:58:12,373 INFO ]: TraceAbstraction initialized [2018-06-18 14:58:12,373 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 02:58:11" (1/3) ... [2018-06-18 14:58:12,374 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d95230 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 18.06 02:58:12, skipping insertion in model container [2018-06-18 14:58:12,374 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 02:58:11" (2/3) ... [2018-06-18 14:58:12,374 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d95230 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.06 02:58:12, skipping insertion in model container [2018-06-18 14:58:12,374 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 02:58:12" (3/3) ... [2018-06-18 14:58:12,376 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-18 14:58:12,400 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-18 14:58:12,422 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-18 14:58:12,510 INFO ]: Using default assertion order modulation [2018-06-18 14:58:12,511 INFO ]: Interprodecural is true [2018-06-18 14:58:12,516 INFO ]: Hoare is false [2018-06-18 14:58:12,516 INFO ]: Compute interpolants for FPandBP [2018-06-18 14:58:12,516 INFO ]: Backedges is TWOTRACK [2018-06-18 14:58:12,516 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-18 14:58:12,516 INFO ]: Difference is false [2018-06-18 14:58:12,516 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-18 14:58:12,516 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-18 14:58:12,541 INFO ]: Start isEmpty. Operand 13 states. [2018-06-18 14:58:12,555 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-18 14:58:12,556 INFO ]: Found error trace [2018-06-18 14:58:12,556 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 14:58:12,557 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 14:58:12,561 INFO ]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times [2018-06-18 14:58:12,562 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 14:58:12,563 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 14:58:12,629 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 14:58:12,629 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 14:58:12,629 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 14:58:12,729 INFO ]: Conjunction of SSA is unsat [2018-06-18 14:58:12,748 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 14:58:13,047 WARN ]: Spent 103.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 1 [2018-06-18 14:58:13,051 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-18 14:58:13,054 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-18 14:58:13,054 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-18 14:58:13,056 INFO ]: Interpolant automaton has 4 states [2018-06-18 14:58:13,072 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-18 14:58:13,074 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-18 14:58:13,076 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-18 14:58:13,250 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 14:58:13,250 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-18 14:58:13,252 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-18 14:58:13,253 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-18 14:58:13,253 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 14:58:13,284 INFO ]: With dead ends: 13 [2018-06-18 14:58:13,284 INFO ]: Without dead ends: 13 [2018-06-18 14:58:13,286 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-18 14:58:13,323 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-18 14:58:13,399 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-18 14:58:13,400 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-18 14:58:13,401 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-18 14:58:13,403 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-18 14:58:13,403 INFO ]: Finished accepts. word is rejected. [2018-06-18 14:58:13,403 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-18 14:58:13,403 INFO ]: Interpolant automaton has 4 states. [2018-06-18 14:58:13,403 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-18 14:58:13,404 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-18 14:58:13,404 INFO ]: Found error trace [2018-06-18 14:58:13,404 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 14:58:13,405 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 14:58:13,405 INFO ]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times [2018-06-18 14:58:13,405 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 14:58:13,405 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 14:58:13,407 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 14:58:13,407 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 14:58:13,407 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 14:58:13,513 INFO ]: Conjunction of SSA is unsat [2018-06-18 14:58:13,513 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 14:58:14,544 WARN ]: Spent 714.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2018-06-18 14:58:14,615 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 14:58:14,616 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 14:58:14,616 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 14:58:14,623 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 14:58:14,687 INFO ]: Conjunction of SSA is unsat [2018-06-18 14:58:14,698 INFO ]: Computing forward predicates... [2018-06-18 14:58:15,037 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 14:58:15,074 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 14:58:15,074 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-06-18 14:58:15,074 INFO ]: Interpolant automaton has 8 states [2018-06-18 14:58:15,075 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-18 14:58:15,075 INFO ]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-06-18 14:58:15,075 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2018-06-18 14:58:15,586 WARN ]: Spent 278.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2018-06-18 14:58:15,800 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 14:58:15,800 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-18 14:58:15,801 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-18 14:58:15,801 INFO ]: Start accepts. Automaton has 8 states. Word has length 13 [2018-06-18 14:58:15,801 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 14:58:15,802 INFO ]: With dead ends: 15 [2018-06-18 14:58:15,802 INFO ]: Without dead ends: 15 [2018-06-18 14:58:15,803 INFO ]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-06-18 14:58:15,803 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-18 14:58:15,807 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-18 14:58:15,807 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-18 14:58:15,808 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-18 14:58:15,808 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-18 14:58:15,808 INFO ]: Finished accepts. word is rejected. [2018-06-18 14:58:15,808 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-18 14:58:15,808 INFO ]: Interpolant automaton has 8 states. [2018-06-18 14:58:15,808 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-18 14:58:15,808 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-18 14:58:15,808 INFO ]: Found error trace [2018-06-18 14:58:15,809 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 14:58:15,809 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 14:58:15,809 INFO ]: Analyzing trace with hash -1649658231, now seen corresponding path program 2 times [2018-06-18 14:58:15,809 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 14:58:15,809 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 14:58:15,811 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 14:58:15,811 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 14:58:15,811 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 14:58:15,897 INFO ]: Conjunction of SSA is unsat [2018-06-18 14:58:15,897 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 14:58:16,278 WARN ]: Spent 159.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 18 [2018-06-18 14:58:16,493 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-18 14:58:16,493 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 14:58:16,493 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 14:58:16,500 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-18 14:58:16,568 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-18 14:58:16,568 INFO ]: Conjunction of SSA is unsat [2018-06-18 14:58:16,572 INFO ]: Computing forward predicates... [2018-06-18 14:58:18,270 INFO ]: Checked inductivity of 10 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-18 14:58:18,298 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 14:58:18,298 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2018-06-18 14:58:18,298 INFO ]: Interpolant automaton has 12 states [2018-06-18 14:58:18,298 INFO ]: Constructing interpolant automaton starting with 12 interpolants. [2018-06-18 14:58:18,299 INFO ]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2018-06-18 14:58:18,299 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 12 states. [2018-06-18 14:58:18,532 WARN ]: Spent 147.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2018-06-18 14:58:18,698 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 14:58:18,698 INFO ]: Finished difference Result 11 states and 12 transitions. [2018-06-18 14:58:18,699 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-18 14:58:18,699 INFO ]: Start accepts. Automaton has 12 states. Word has length 17 [2018-06-18 14:58:18,699 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 14:58:18,699 INFO ]: With dead ends: 11 [2018-06-18 14:58:18,699 INFO ]: Without dead ends: 0 [2018-06-18 14:58:18,699 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2018-06-18 14:58:18,699 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-18 14:58:18,700 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-18 14:58:18,700 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-18 14:58:18,700 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-18 14:58:18,700 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2018-06-18 14:58:18,700 INFO ]: Finished accepts. word is rejected. [2018-06-18 14:58:18,700 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-18 14:58:18,700 INFO ]: Interpolant automaton has 12 states. [2018-06-18 14:58:18,700 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-18 14:58:18,700 INFO ]: Finished isEmpty. No accepting run. [2018-06-18 14:58:18,705 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.06 02:58:18 BoogieIcfgContainer [2018-06-18 14:58:18,705 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-18 14:58:18,706 INFO ]: Toolchain (without parser) took 6958.61 ms. Allocated memory was 309.3 MB in the beginning and 337.1 MB in the end (delta: 27.8 MB). Free memory was 261.7 MB in the beginning and 213.0 MB in the end (delta: 48.7 MB). Peak memory consumption was 76.4 MB. Max. memory is 3.6 GB. [2018-06-18 14:58:18,708 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 309.3 MB. Free memory is still 273.8 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-18 14:58:18,708 INFO ]: ChcToBoogie took 68.48 ms. Allocated memory is still 309.3 MB. Free memory was 261.7 MB in the beginning and 259.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-18 14:58:18,709 INFO ]: Boogie Preprocessor took 43.08 ms. Allocated memory is still 309.3 MB. Free memory was 259.7 MB in the beginning and 257.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-18 14:58:18,710 INFO ]: RCFGBuilder took 482.06 ms. Allocated memory is still 309.3 MB. Free memory was 257.7 MB in the beginning and 247.8 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 3.6 GB. [2018-06-18 14:58:18,710 INFO ]: TraceAbstraction took 6353.82 ms. Allocated memory was 309.3 MB in the beginning and 337.1 MB in the end (delta: 27.8 MB). Free memory was 247.8 MB in the beginning and 213.0 MB in the end (delta: 34.7 MB). Peak memory consumption was 62.5 MB. Max. memory is 3.6 GB. [2018-06-18 14:58:18,714 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.07 ms. Allocated memory is still 309.3 MB. Free memory is still 273.8 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 68.48 ms. Allocated memory is still 309.3 MB. Free memory was 261.7 MB in the beginning and 259.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 43.08 ms. Allocated memory is still 309.3 MB. Free memory was 259.7 MB in the beginning and 257.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 482.06 ms. Allocated memory is still 309.3 MB. Free memory was 257.7 MB in the beginning and 247.8 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 6353.82 ms. Allocated memory was 309.3 MB in the beginning and 337.1 MB in the end (delta: 27.8 MB). Free memory was 247.8 MB in the beginning and 213.0 MB in the end (delta: 34.7 MB). Peak memory consumption was 62.5 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, 6.2s OverallTime, 3 OverallIterations, 3 TraceHistogramMax, 1.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 29 SDtfs, 18 SDslu, 72 SDs, 0 SdLazy, 60 SolverSat, 27 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 2.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred in iteration=2, 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, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 4.0s InterpolantComputationTime, 69 NumberOfCodeBlocks, 69 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 64 ConstructedInterpolants, 0 QuantifiedInterpolants, 4208 SizeOfPredicates, 61 NumberOfNonLiveVariables, 395 ConjunctsInSsa, 50 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 10/26 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_3_e3_442_e5_260.smt2_chcToBoogie_automizer.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-18_14-58-18-725.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/durationThm_3_e3_442_e5_260.smt2_chcToBoogie_automizer.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-18_14-58-18-725.csv Received shutdown request...