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/metros_1_e2_1102_e2_943.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-55b8104 [2018-06-18 16:04:06,647 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-18 16:04:06,650 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-18 16:04:06,664 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-18 16:04:06,665 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-18 16:04:06,666 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-18 16:04:06,667 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-18 16:04:06,669 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-18 16:04:06,670 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-18 16:04:06,671 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-18 16:04:06,672 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-18 16:04:06,672 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-18 16:04:06,673 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-18 16:04:06,675 INFO L177 SettingsManager]: ChcToBoogie provides no preferences, ignoring... [2018-06-18 16:04:06,675 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-18 16:04:06,676 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-18 16:04:06,678 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-18 16:04:06,680 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-18 16:04:06,681 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-18 16:04:06,683 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-18 16:04:06,684 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-18 16:04:06,687 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-18 16:04:06,687 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-18 16:04:06,687 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-18 16:04:06,688 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-18 16:04:06,689 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-18 16:04:06,690 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-18 16:04:06,691 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-18 16:04:06,692 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-18 16:04:06,693 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-18 16:04:06,693 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-18 16:04:06,694 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-18 16:04:06,695 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-18 16:04:06,696 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-18 16:04:06,696 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-18 16:04:06,697 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chccomp2018/chcToBoogie_automizer.epf [2018-06-18 16:04:06,710 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-18 16:04:06,710 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-18 16:04:06,711 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-18 16:04:06,711 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-18 16:04:06,712 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-18 16:04:06,713 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-18 16:04:06,713 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-18 16:04:06,713 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-18 16:04:06,713 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-18 16:04:06,714 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-18 16:04:06,714 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-18 16:04:06,714 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-18 16:04:06,714 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-18 16:04:06,715 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-18 16:04:06,715 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-18 16:04:06,715 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-18 16:04:06,715 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-18 16:04:06,717 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-18 16:04:06,717 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-18 16:04:06,765 INFO ]: Repository-Root is: /tmp [2018-06-18 16:04:06,778 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-18 16:04:06,783 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-18 16:04:06,785 INFO ]: Initializing SmtParser... [2018-06-18 16:04:06,785 INFO ]: SmtParser initialized [2018-06-18 16:04:06,786 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_1_e2_1102_e2_943.smt2 [2018-06-18 16:04:06,787 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 16:04:06,891 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_1_e2_1102_e2_943.smt2 unknown [2018-06-18 16:04:07,334 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_1_e2_1102_e2_943.smt2 [2018-06-18 16:04:07,339 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-18 16:04:07,344 INFO ]: Walking toolchain with 4 elements. [2018-06-18 16:04:07,344 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-18 16:04:07,344 INFO ]: Initializing ChcToBoogie... [2018-06-18 16:04:07,345 INFO ]: ChcToBoogie initialized [2018-06-18 16:04:07,352 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 04:04:07" (1/1) ... [2018-06-18 16:04:07,429 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:04:07 Unit [2018-06-18 16:04:07,429 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-18 16:04:07,430 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-18 16:04:07,430 INFO ]: Initializing Boogie Preprocessor... [2018-06-18 16:04:07,430 INFO ]: Boogie Preprocessor initialized [2018-06-18 16:04:07,453 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:04:07" (1/1) ... [2018-06-18 16:04:07,453 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:04:07" (1/1) ... [2018-06-18 16:04:07,468 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:04:07" (1/1) ... [2018-06-18 16:04:07,479 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:04:07" (1/1) ... [2018-06-18 16:04:07,485 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:04:07" (1/1) ... [2018-06-18 16:04:07,486 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:04:07" (1/1) ... [2018-06-18 16:04:07,497 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:04:07" (1/1) ... [2018-06-18 16:04:07,501 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-18 16:04:07,501 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-18 16:04:07,501 INFO ]: Initializing RCFGBuilder... [2018-06-18 16:04:07,501 INFO ]: RCFGBuilder initialized [2018-06-18 16:04:07,502 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:04:07" (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) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-18 16:04:07,529 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-18 16:04:07,529 INFO ]: Found specification of procedure False [2018-06-18 16:04:07,529 INFO ]: Found implementation of procedure False [2018-06-18 16:04:07,529 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-18 16:04:07,529 INFO ]: Found specification of procedure state [2018-06-18 16:04:07,529 INFO ]: Found implementation of procedure state [2018-06-18 16:04:07,529 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-18 16:04:07,529 INFO ]: Found specification of procedure Ultimate.START [2018-06-18 16:04:07,529 INFO ]: Found implementation of procedure Ultimate.START [2018-06-18 16:04:07,989 INFO ]: Using library mode [2018-06-18 16:04:07,990 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 04:04:07 BoogieIcfgContainer [2018-06-18 16:04:07,990 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-18 16:04:07,992 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-18 16:04:07,992 INFO ]: Initializing TraceAbstraction... [2018-06-18 16:04:07,995 INFO ]: TraceAbstraction initialized [2018-06-18 16:04:07,996 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 04:04:07" (1/3) ... [2018-06-18 16:04:07,997 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7890d535 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 18.06 04:04:07, skipping insertion in model container [2018-06-18 16:04:08,001 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:04:07" (2/3) ... [2018-06-18 16:04:08,001 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7890d535 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.06 04:04:08, skipping insertion in model container [2018-06-18 16:04:08,001 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 04:04:07" (3/3) ... [2018-06-18 16:04:08,003 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-18 16:04:08,015 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-18 16:04:08,028 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-18 16:04:08,080 INFO ]: Using default assertion order modulation [2018-06-18 16:04:08,080 INFO ]: Interprodecural is true [2018-06-18 16:04:08,080 INFO ]: Hoare is false [2018-06-18 16:04:08,080 INFO ]: Compute interpolants for FPandBP [2018-06-18 16:04:08,080 INFO ]: Backedges is TWOTRACK [2018-06-18 16:04:08,080 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-18 16:04:08,080 INFO ]: Difference is false [2018-06-18 16:04:08,080 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-18 16:04:08,080 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-18 16:04:08,095 INFO ]: Start isEmpty. Operand 13 states. [2018-06-18 16:04:08,107 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-18 16:04:08,107 INFO ]: Found error trace [2018-06-18 16:04:08,108 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 16:04:08,109 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 16:04:08,112 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-18 16:04:08,114 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 16:04:08,114 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 16:04:08,157 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:04:08,157 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 16:04:08,157 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:04:08,256 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:04:08,267 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 16:04:08,443 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-18 16:04:08,446 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-18 16:04:08,446 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-18 16:04:08,448 INFO ]: Interpolant automaton has 4 states [2018-06-18 16:04:08,464 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-18 16:04:08,464 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-18 16:04:08,467 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-18 16:04:08,591 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 16:04:08,591 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-18 16:04:08,592 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-18 16:04:08,593 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-18 16:04:08,594 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 16:04:08,608 INFO ]: With dead ends: 13 [2018-06-18 16:04:08,608 INFO ]: Without dead ends: 13 [2018-06-18 16:04:08,610 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 16:04:08,628 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-18 16:04:08,654 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-18 16:04:08,655 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-18 16:04:08,656 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-18 16:04:08,657 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-18 16:04:08,657 INFO ]: Finished accepts. word is rejected. [2018-06-18 16:04:08,657 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-18 16:04:08,657 INFO ]: Interpolant automaton has 4 states. [2018-06-18 16:04:08,657 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-18 16:04:08,658 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-18 16:04:08,658 INFO ]: Found error trace [2018-06-18 16:04:08,659 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 16:04:08,659 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 16:04:08,659 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-18 16:04:08,659 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 16:04:08,659 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 16:04:08,660 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:04:08,660 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 16:04:08,660 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:04:08,725 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:04:08,731 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 16:04:09,025 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 16:04:09,025 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 16:04:09,025 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 16:04:09,035 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 16:04:09,179 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:04:09,190 INFO ]: Computing forward predicates... [2018-06-18 16:04:09,624 WARN ]: Spent 207.00 ms on a formula simplification. DAG size of input: 5 DAG size of output: 4 [2018-06-18 16:04:09,853 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 16:04:09,889 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 16:04:09,889 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-06-18 16:04:09,890 INFO ]: Interpolant automaton has 8 states [2018-06-18 16:04:09,890 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-18 16:04:09,890 INFO ]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-06-18 16:04:09,891 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2018-06-18 16:04:10,520 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 16:04:10,520 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-18 16:04:10,522 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-18 16:04:10,522 INFO ]: Start accepts. Automaton has 8 states. Word has length 13 [2018-06-18 16:04:10,522 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 16:04:10,523 INFO ]: With dead ends: 15 [2018-06-18 16:04:10,523 INFO ]: Without dead ends: 15 [2018-06-18 16:04:10,524 INFO ]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-06-18 16:04:10,524 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-18 16:04:10,527 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-18 16:04:10,527 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-18 16:04:10,528 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-18 16:04:10,528 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-18 16:04:10,528 INFO ]: Finished accepts. word is rejected. [2018-06-18 16:04:10,528 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-18 16:04:10,528 INFO ]: Interpolant automaton has 8 states. [2018-06-18 16:04:10,528 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-18 16:04:10,529 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-18 16:04:10,529 INFO ]: Found error trace [2018-06-18 16:04:10,529 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 16:04:10,529 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 16:04:10,529 INFO ]: Analyzing trace with hash -1486246934, now seen corresponding path program 2 times [2018-06-18 16:04:10,529 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 16:04:10,529 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 16:04:10,531 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:04:10,531 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 16:04:10,531 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:04:10,646 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:04:10,649 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 16:04:10,929 WARN ]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-18 16:04:11,265 WARN ]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-06-18 16:04:11,320 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-18 16:04:11,320 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 16:04:11,320 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 16:04:11,334 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-18 16:04:11,471 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-18 16:04:11,471 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:04:11,477 INFO ]: Computing forward predicates... [2018-06-18 16:04:11,671 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-18 16:04:11,706 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 16:04:11,706 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2018-06-18 16:04:11,707 INFO ]: Interpolant automaton has 12 states [2018-06-18 16:04:11,707 INFO ]: Constructing interpolant automaton starting with 12 interpolants. [2018-06-18 16:04:11,707 INFO ]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2018-06-18 16:04:11,707 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 12 states. [2018-06-18 16:04:12,111 WARN ]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2018-06-18 16:04:12,356 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 16:04:12,356 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-18 16:04:12,357 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-18 16:04:12,357 INFO ]: Start accepts. Automaton has 12 states. Word has length 17 [2018-06-18 16:04:12,357 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 16:04:12,357 INFO ]: With dead ends: 17 [2018-06-18 16:04:12,357 INFO ]: Without dead ends: 17 [2018-06-18 16:04:12,358 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2018-06-18 16:04:12,358 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-18 16:04:12,361 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-18 16:04:12,361 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-18 16:04:12,362 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-18 16:04:12,362 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-18 16:04:12,362 INFO ]: Finished accepts. word is rejected. [2018-06-18 16:04:12,362 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-18 16:04:12,362 INFO ]: Interpolant automaton has 12 states. [2018-06-18 16:04:12,362 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-18 16:04:12,363 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-18 16:04:12,363 INFO ]: Found error trace [2018-06-18 16:04:12,363 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 16:04:12,363 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 16:04:12,363 INFO ]: Analyzing trace with hash -2056434034, now seen corresponding path program 3 times [2018-06-18 16:04:12,363 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 16:04:12,363 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 16:04:12,364 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:04:12,364 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 16:04:12,364 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:04:12,539 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:04:12,540 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 16:04:13,065 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-18 16:04:13,065 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 16:04:13,065 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 16:04:13,081 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-18 16:04:13,237 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-18 16:04:13,237 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:04:13,245 INFO ]: Computing forward predicates... [2018-06-18 16:04:13,833 WARN ]: expecting exponential blowup for input size 6 [2018-06-18 16:04:13,892 WARN ]: expecting exponential blowup for input size 6 [2018-06-18 16:04:13,929 WARN ]: expecting exponential blowup for input size 8 [2018-06-18 16:04:14,132 WARN ]: expecting exponential blowup for input size 6 [2018-06-18 16:04:14,150 WARN ]: expecting exponential blowup for input size 6 [2018-06-18 16:04:14,162 WARN ]: expecting exponential blowup for input size 8 [2018-06-18 16:04:16,343 WARN ]: Spent 693.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 52 [2018-06-18 16:04:16,614 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-18 16:04:16,641 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 16:04:16,641 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2018-06-18 16:04:16,642 INFO ]: Interpolant automaton has 16 states [2018-06-18 16:04:16,642 INFO ]: Constructing interpolant automaton starting with 16 interpolants. [2018-06-18 16:04:16,642 INFO ]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2018-06-18 16:04:16,642 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 16 states. [2018-06-18 16:04:17,271 WARN ]: Spent 523.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 115 [2018-06-18 16:04:17,781 WARN ]: Spent 247.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 79 [2018-06-18 16:04:18,245 WARN ]: Spent 405.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 95 [2018-06-18 16:04:18,980 WARN ]: Spent 517.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 101 [2018-06-18 16:04:19,029 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 16:04:19,029 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-18 16:04:19,030 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-18 16:04:19,031 INFO ]: Start accepts. Automaton has 16 states. Word has length 21 [2018-06-18 16:04:19,031 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 16:04:19,031 INFO ]: With dead ends: 19 [2018-06-18 16:04:19,031 INFO ]: Without dead ends: 19 [2018-06-18 16:04:19,032 INFO ]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2018-06-18 16:04:19,032 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-18 16:04:19,036 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-18 16:04:19,036 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-18 16:04:19,036 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-18 16:04:19,036 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-18 16:04:19,036 INFO ]: Finished accepts. word is rejected. [2018-06-18 16:04:19,037 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-18 16:04:19,037 INFO ]: Interpolant automaton has 16 states. [2018-06-18 16:04:19,037 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-18 16:04:19,037 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-18 16:04:19,037 INFO ]: Found error trace [2018-06-18 16:04:19,037 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 16:04:19,037 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 16:04:19,038 INFO ]: Analyzing trace with hash -434924750, now seen corresponding path program 4 times [2018-06-18 16:04:19,038 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 16:04:19,038 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 16:04:19,038 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:04:19,038 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 16:04:19,038 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:04:19,206 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:04:19,207 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 16:04:19,826 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-18 16:04:19,826 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 16:04:19,826 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-18 16:04:19,841 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-18 16:04:20,061 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-18 16:04:20,061 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:04:20,071 INFO ]: Computing forward predicates... [2018-06-18 16:04:20,492 WARN ]: Spent 100.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 21 [2018-06-18 16:04:23,233 WARN ]: Spent 1.07 s on a formula simplification. DAG size of input: 132 DAG size of output: 48 [2018-06-18 16:04:25,756 WARN ]: Spent 722.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 60 [2018-06-18 16:04:29,710 WARN ]: Spent 878.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 28 [2018-06-18 16:04:29,813 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-18 16:04:29,845 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 16:04:29,845 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2018-06-18 16:04:29,845 INFO ]: Interpolant automaton has 20 states [2018-06-18 16:04:29,845 INFO ]: Constructing interpolant automaton starting with 20 interpolants. [2018-06-18 16:04:29,846 INFO ]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2018-06-18 16:04:29,846 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 20 states. [2018-06-18 16:04:30,828 WARN ]: Spent 925.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 173 [2018-06-18 16:04:31,074 WARN ]: Spent 220.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 75 [2018-06-18 16:04:32,137 WARN ]: Spent 993.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 158 [2018-06-18 16:04:32,817 WARN ]: Spent 621.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 151 [2018-06-18 16:04:34,529 WARN ]: Spent 1.65 s on a formula simplification. DAG size of input: 204 DAG size of output: 170 [2018-06-18 16:04:35,694 WARN ]: Spent 1.10 s on a formula simplification. DAG size of input: 203 DAG size of output: 172 [2018-06-18 16:04:35,713 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 16:04:35,713 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-18 16:04:35,714 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-18 16:04:35,714 INFO ]: Start accepts. Automaton has 20 states. Word has length 25 [2018-06-18 16:04:35,714 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 16:04:35,714 INFO ]: With dead ends: 15 [2018-06-18 16:04:35,714 INFO ]: Without dead ends: 0 [2018-06-18 16:04:35,715 INFO ]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2018-06-18 16:04:35,715 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-18 16:04:35,715 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-18 16:04:35,715 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-18 16:04:35,715 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-18 16:04:35,715 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2018-06-18 16:04:35,715 INFO ]: Finished accepts. word is rejected. [2018-06-18 16:04:35,715 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-18 16:04:35,715 INFO ]: Interpolant automaton has 20 states. [2018-06-18 16:04:35,715 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-18 16:04:35,715 INFO ]: Finished isEmpty. No accepting run. [2018-06-18 16:04:35,720 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.06 04:04:35 BoogieIcfgContainer [2018-06-18 16:04:35,720 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-18 16:04:35,721 INFO ]: Toolchain (without parser) took 28381.33 ms. Allocated memory was 302.0 MB in the beginning and 741.3 MB in the end (delta: 439.4 MB). Free memory was 243.4 MB in the beginning and 618.0 MB in the end (delta: -374.7 MB). Peak memory consumption was 64.7 MB. Max. memory is 3.6 GB. [2018-06-18 16:04:35,721 INFO ]: SmtParser took 0.10 ms. Allocated memory is still 302.0 MB. Free memory is still 267.5 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-18 16:04:35,722 INFO ]: ChcToBoogie took 85.16 ms. Allocated memory is still 302.0 MB. Free memory was 242.4 MB in the beginning and 239.4 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. [2018-06-18 16:04:35,722 INFO ]: Boogie Preprocessor took 70.94 ms. Allocated memory is still 302.0 MB. Free memory was 239.4 MB in the beginning and 238.4 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. [2018-06-18 16:04:35,722 INFO ]: RCFGBuilder took 488.62 ms. Allocated memory is still 302.0 MB. Free memory was 237.4 MB in the beginning and 213.4 MB in the end (delta: 24.0 MB). Peak memory consumption was 24.0 MB. Max. memory is 3.6 GB. [2018-06-18 16:04:35,723 INFO ]: TraceAbstraction took 27728.01 ms. Allocated memory was 302.0 MB in the beginning and 741.3 MB in the end (delta: 439.4 MB). Free memory was 212.4 MB in the beginning and 618.0 MB in the end (delta: -405.6 MB). Peak memory consumption was 33.7 MB. Max. memory is 3.6 GB. [2018-06-18 16:04:35,725 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.10 ms. Allocated memory is still 302.0 MB. Free memory is still 267.5 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 85.16 ms. Allocated memory is still 302.0 MB. Free memory was 242.4 MB in the beginning and 239.4 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 70.94 ms. Allocated memory is still 302.0 MB. Free memory was 239.4 MB in the beginning and 238.4 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. * RCFGBuilder took 488.62 ms. Allocated memory is still 302.0 MB. Free memory was 237.4 MB in the beginning and 213.4 MB in the end (delta: 24.0 MB). Peak memory consumption was 24.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 27728.01 ms. Allocated memory was 302.0 MB in the beginning and 741.3 MB in the end (delta: 439.4 MB). Free memory was 212.4 MB in the beginning and 618.0 MB in the end (delta: -405.6 MB). Peak memory consumption was 33.7 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, 27.6s OverallTime, 5 OverallIterations, 5 TraceHistogramMax, 9.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 52 SDtfs, 77 SDslu, 199 SDs, 0 SdLazy, 172 SolverSat, 108 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 129 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 15.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=4, 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, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 16.2s InterpolantComputationTime, 161 NumberOfCodeBlocks, 161 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 152 ConstructedInterpolants, 0 QuantifiedInterpolants, 63964 SizeOfPredicates, 152 NumberOfNonLiveVariables, 3136 ConjunctsInSsa, 182 ConjunctsInUnsatCore, 9 InterpolantComputations, 1 PerfectInterpolantSequences, 40/140 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/metros_1_e2_1102_e2_943.smt2_chcToBoogie_automizer.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-18_16-04-35-734.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/metros_1_e2_1102_e2_943.smt2_chcToBoogie_automizer.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-18_16-04-35-734.csv Received shutdown request...