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_e1_846_e2_1394.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-55b8104 [2018-06-18 16:03:26,625 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-18 16:03:26,627 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-18 16:03:26,639 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-18 16:03:26,639 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-18 16:03:26,640 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-18 16:03:26,641 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-18 16:03:26,643 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-18 16:03:26,645 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-18 16:03:26,646 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-18 16:03:26,647 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-18 16:03:26,648 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-18 16:03:26,649 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-18 16:03:26,650 INFO L177 SettingsManager]: ChcToBoogie provides no preferences, ignoring... [2018-06-18 16:03:26,650 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-18 16:03:26,651 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-18 16:03:26,653 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-18 16:03:26,655 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-18 16:03:26,657 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-18 16:03:26,658 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-18 16:03:26,659 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-18 16:03:26,662 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-18 16:03:26,662 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-18 16:03:26,663 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-18 16:03:26,664 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-18 16:03:26,665 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-18 16:03:26,666 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-18 16:03:26,666 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-18 16:03:26,667 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-18 16:03:26,668 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-18 16:03:26,668 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-18 16:03:26,669 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-18 16:03:26,670 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-18 16:03:26,670 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-18 16:03:26,671 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-18 16:03:26,672 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chccomp2018/chcToBoogie_automizer.epf [2018-06-18 16:03:26,690 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-18 16:03:26,690 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-18 16:03:26,691 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-18 16:03:26,691 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-18 16:03:26,692 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-18 16:03:26,693 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-18 16:03:26,693 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-18 16:03:26,693 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-18 16:03:26,694 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-18 16:03:26,694 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-18 16:03:26,694 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-18 16:03:26,694 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-18 16:03:26,695 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-18 16:03:26,695 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-18 16:03:26,695 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-18 16:03:26,695 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-18 16:03:26,696 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-18 16:03:26,702 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-18 16:03:26,703 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-18 16:03:26,750 INFO ]: Repository-Root is: /tmp [2018-06-18 16:03:26,766 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-18 16:03:26,772 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-18 16:03:26,773 INFO ]: Initializing SmtParser... [2018-06-18 16:03:26,774 INFO ]: SmtParser initialized [2018-06-18 16:03:26,774 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_1_e1_846_e2_1394.smt2 [2018-06-18 16:03:26,776 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 16:03:26,866 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_1_e1_846_e2_1394.smt2 unknown [2018-06-18 16:03:27,361 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_1_e1_846_e2_1394.smt2 [2018-06-18 16:03:27,366 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-18 16:03:27,372 INFO ]: Walking toolchain with 4 elements. [2018-06-18 16:03:27,372 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-18 16:03:27,372 INFO ]: Initializing ChcToBoogie... [2018-06-18 16:03:27,373 INFO ]: ChcToBoogie initialized [2018-06-18 16:03:27,380 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 04:03:27" (1/1) ... [2018-06-18 16:03:27,459 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:03:27 Unit [2018-06-18 16:03:27,460 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-18 16:03:27,460 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-18 16:03:27,460 INFO ]: Initializing Boogie Preprocessor... [2018-06-18 16:03:27,460 INFO ]: Boogie Preprocessor initialized [2018-06-18 16:03:27,507 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:03:27" (1/1) ... [2018-06-18 16:03:27,507 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:03:27" (1/1) ... [2018-06-18 16:03:27,531 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:03:27" (1/1) ... [2018-06-18 16:03:27,532 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:03:27" (1/1) ... [2018-06-18 16:03:27,538 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:03:27" (1/1) ... [2018-06-18 16:03:27,539 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:03:27" (1/1) ... [2018-06-18 16:03:27,551 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:03:27" (1/1) ... [2018-06-18 16:03:27,554 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-18 16:03:27,555 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-18 16:03:27,555 INFO ]: Initializing RCFGBuilder... [2018-06-18 16:03:27,555 INFO ]: RCFGBuilder initialized [2018-06-18 16:03:27,556 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:03:27" (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 16:03:27,572 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-18 16:03:27,572 INFO ]: Found specification of procedure False [2018-06-18 16:03:27,572 INFO ]: Found implementation of procedure False [2018-06-18 16:03:27,572 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-18 16:03:27,572 INFO ]: Found specification of procedure state [2018-06-18 16:03:27,572 INFO ]: Found implementation of procedure state [2018-06-18 16:03:27,573 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-18 16:03:27,573 INFO ]: Found specification of procedure Ultimate.START [2018-06-18 16:03:27,573 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 16:03:27,956 INFO ]: Using library mode [2018-06-18 16:03:27,958 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 04:03:27 BoogieIcfgContainer [2018-06-18 16:03:27,958 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-18 16:03:27,960 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-18 16:03:27,960 INFO ]: Initializing TraceAbstraction... [2018-06-18 16:03:27,969 INFO ]: TraceAbstraction initialized [2018-06-18 16:03:27,969 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 04:03:27" (1/3) ... [2018-06-18 16:03:27,970 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 04:03:27, skipping insertion in model container [2018-06-18 16:03:27,970 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:03:27" (2/3) ... [2018-06-18 16:03:27,971 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 04:03:27, skipping insertion in model container [2018-06-18 16:03:27,971 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 04:03:27" (3/3) ... [2018-06-18 16:03:27,973 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-18 16:03:27,984 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-18 16:03:27,995 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-18 16:03:28,037 INFO ]: Using default assertion order modulation [2018-06-18 16:03:28,038 INFO ]: Interprodecural is true [2018-06-18 16:03:28,038 INFO ]: Hoare is false [2018-06-18 16:03:28,038 INFO ]: Compute interpolants for FPandBP [2018-06-18 16:03:28,038 INFO ]: Backedges is TWOTRACK [2018-06-18 16:03:28,038 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-18 16:03:28,038 INFO ]: Difference is false [2018-06-18 16:03:28,038 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-18 16:03:28,038 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-18 16:03:28,062 INFO ]: Start isEmpty. Operand 13 states. [2018-06-18 16:03:28,082 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-18 16:03:28,082 INFO ]: Found error trace [2018-06-18 16:03:28,083 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 16:03:28,083 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 16:03:28,089 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-18 16:03:28,091 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 16:03:28,091 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 16:03:28,144 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:03:28,144 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 16:03:28,144 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:03:28,258 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:03:28,275 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 16:03:28,508 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-18 16:03:28,511 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-18 16:03:28,512 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-18 16:03:28,515 INFO ]: Interpolant automaton has 4 states [2018-06-18 16:03:28,532 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-18 16:03:28,533 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-18 16:03:28,536 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-18 16:03:28,696 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 16:03:28,696 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-18 16:03:28,698 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-18 16:03:28,700 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-18 16:03:28,700 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 16:03:28,714 INFO ]: With dead ends: 13 [2018-06-18 16:03:28,714 INFO ]: Without dead ends: 13 [2018-06-18 16:03:28,715 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 16:03:28,729 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-18 16:03:28,756 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-18 16:03:28,758 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-18 16:03:28,758 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-18 16:03:28,762 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-18 16:03:28,762 INFO ]: Finished accepts. word is rejected. [2018-06-18 16:03:28,762 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-18 16:03:28,762 INFO ]: Interpolant automaton has 4 states. [2018-06-18 16:03:28,762 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-18 16:03:28,764 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-18 16:03:28,764 INFO ]: Found error trace [2018-06-18 16:03:28,764 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 16:03:28,764 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 16:03:28,764 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-18 16:03:28,764 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 16:03:28,764 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 16:03:28,765 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:03:28,765 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 16:03:28,765 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:03:28,825 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:03:28,826 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 16:03:29,120 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 16:03:29,120 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 16:03:29,120 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 16:03:29,131 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 16:03:29,262 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:03:29,272 INFO ]: Computing forward predicates... [2018-06-18 16:03:29,609 WARN ]: Spent 109.00 ms on a formula simplification. DAG size of input: 5 DAG size of output: 4 [2018-06-18 16:03:29,747 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 16:03:29,783 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 16:03:29,783 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-06-18 16:03:29,784 INFO ]: Interpolant automaton has 8 states [2018-06-18 16:03:29,784 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-18 16:03:29,784 INFO ]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-06-18 16:03:29,784 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2018-06-18 16:03:30,060 WARN ]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 4 [2018-06-18 16:03:30,333 WARN ]: Spent 125.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 7 [2018-06-18 16:03:30,481 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 16:03:30,481 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-18 16:03:30,482 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-18 16:03:30,482 INFO ]: Start accepts. Automaton has 8 states. Word has length 13 [2018-06-18 16:03:30,483 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 16:03:30,483 INFO ]: With dead ends: 15 [2018-06-18 16:03:30,483 INFO ]: Without dead ends: 15 [2018-06-18 16:03:30,484 INFO ]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-06-18 16:03:30,484 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-18 16:03:30,488 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-18 16:03:30,488 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-18 16:03:30,488 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-18 16:03:30,488 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-18 16:03:30,488 INFO ]: Finished accepts. word is rejected. [2018-06-18 16:03:30,488 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-18 16:03:30,488 INFO ]: Interpolant automaton has 8 states. [2018-06-18 16:03:30,488 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-18 16:03:30,489 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-18 16:03:30,489 INFO ]: Found error trace [2018-06-18 16:03:30,489 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 16:03:30,489 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 16:03:30,489 INFO ]: Analyzing trace with hash -1486246934, now seen corresponding path program 2 times [2018-06-18 16:03:30,489 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 16:03:30,489 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 16:03:30,490 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:03:30,490 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 16:03:30,490 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:03:30,604 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:03:30,605 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 16:03:30,951 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-18 16:03:30,951 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 16:03:30,951 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 16:03:30,966 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-18 16:03:31,106 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-18 16:03:31,106 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:03:31,112 INFO ]: Computing forward predicates... [2018-06-18 16:03:31,548 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-18 16:03:31,570 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 16:03:31,570 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2018-06-18 16:03:31,571 INFO ]: Interpolant automaton has 12 states [2018-06-18 16:03:31,571 INFO ]: Constructing interpolant automaton starting with 12 interpolants. [2018-06-18 16:03:31,571 INFO ]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2018-06-18 16:03:31,571 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 12 states. [2018-06-18 16:03:31,921 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 16:03:31,922 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-18 16:03:31,970 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-18 16:03:31,970 INFO ]: Start accepts. Automaton has 12 states. Word has length 17 [2018-06-18 16:03:31,970 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 16:03:31,971 INFO ]: With dead ends: 17 [2018-06-18 16:03:31,971 INFO ]: Without dead ends: 17 [2018-06-18 16:03:31,971 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2018-06-18 16:03:31,971 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-18 16:03:31,975 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-18 16:03:31,975 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-18 16:03:31,975 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-18 16:03:31,976 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-18 16:03:31,976 INFO ]: Finished accepts. word is rejected. [2018-06-18 16:03:31,976 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-18 16:03:31,976 INFO ]: Interpolant automaton has 12 states. [2018-06-18 16:03:31,976 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-18 16:03:31,976 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-18 16:03:31,976 INFO ]: Found error trace [2018-06-18 16:03:31,976 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 16:03:31,977 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 16:03:31,977 INFO ]: Analyzing trace with hash -2056434034, now seen corresponding path program 3 times [2018-06-18 16:03:31,977 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 16:03:31,977 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 16:03:31,978 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:03:31,978 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 16:03:31,978 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:03:32,069 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:03:32,070 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 16:03:32,451 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-18 16:03:32,451 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 16:03:32,452 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 16:03:32,461 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-18 16:03:32,632 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-18 16:03:32,632 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:03:32,641 INFO ]: Computing forward predicates... [2018-06-18 16:03:33,145 WARN ]: expecting exponential blowup for input size 6 [2018-06-18 16:03:33,193 WARN ]: expecting exponential blowup for input size 6 [2018-06-18 16:03:33,237 WARN ]: expecting exponential blowup for input size 8 [2018-06-18 16:03:33,428 WARN ]: expecting exponential blowup for input size 6 [2018-06-18 16:03:33,446 WARN ]: expecting exponential blowup for input size 6 [2018-06-18 16:03:33,457 WARN ]: expecting exponential blowup for input size 8 [2018-06-18 16:03:35,809 WARN ]: Spent 731.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 52 [2018-06-18 16:03:36,165 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-18 16:03:36,197 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 16:03:36,197 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2018-06-18 16:03:36,197 INFO ]: Interpolant automaton has 16 states [2018-06-18 16:03:36,197 INFO ]: Constructing interpolant automaton starting with 16 interpolants. [2018-06-18 16:03:36,197 INFO ]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2018-06-18 16:03:36,197 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 16 states. [2018-06-18 16:03:36,687 WARN ]: Spent 441.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 88 [2018-06-18 16:03:37,081 WARN ]: Spent 247.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 61 [2018-06-18 16:03:37,450 WARN ]: Spent 331.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 77 [2018-06-18 16:03:37,910 WARN ]: Spent 432.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 81 [2018-06-18 16:03:37,987 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 16:03:37,987 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-18 16:03:37,987 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-18 16:03:37,987 INFO ]: Start accepts. Automaton has 16 states. Word has length 21 [2018-06-18 16:03:37,988 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 16:03:37,988 INFO ]: With dead ends: 13 [2018-06-18 16:03:37,988 INFO ]: Without dead ends: 0 [2018-06-18 16:03:37,988 INFO ]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2018-06-18 16:03:37,988 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-18 16:03:37,988 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-18 16:03:37,988 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-18 16:03:37,988 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-18 16:03:37,988 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2018-06-18 16:03:37,988 INFO ]: Finished accepts. word is rejected. [2018-06-18 16:03:37,988 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-18 16:03:37,988 INFO ]: Interpolant automaton has 16 states. [2018-06-18 16:03:37,988 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-18 16:03:37,988 INFO ]: Finished isEmpty. No accepting run. [2018-06-18 16:03:37,992 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.06 04:03:37 BoogieIcfgContainer [2018-06-18 16:03:37,992 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-18 16:03:37,993 INFO ]: Toolchain (without parser) took 10626.59 ms. Allocated memory was 304.6 MB in the beginning and 543.7 MB in the end (delta: 239.1 MB). Free memory was 246.0 MB in the beginning and 385.4 MB in the end (delta: -139.4 MB). Peak memory consumption was 99.7 MB. Max. memory is 3.6 GB. [2018-06-18 16:03:37,994 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 304.6 MB. Free memory is still 270.1 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-18 16:03:37,994 INFO ]: ChcToBoogie took 87.42 ms. Allocated memory is still 304.6 MB. Free memory was 245.0 MB in the beginning and 242.0 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. [2018-06-18 16:03:37,994 INFO ]: Boogie Preprocessor took 93.83 ms. Allocated memory is still 304.6 MB. Free memory was 242.0 MB in the beginning and 240.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-18 16:03:37,994 INFO ]: RCFGBuilder took 403.61 ms. Allocated memory is still 304.6 MB. Free memory was 240.0 MB in the beginning and 216.0 MB in the end (delta: 24.0 MB). Peak memory consumption was 24.0 MB. Max. memory is 3.6 GB. [2018-06-18 16:03:37,995 INFO ]: TraceAbstraction took 10032.20 ms. Allocated memory was 304.6 MB in the beginning and 543.7 MB in the end (delta: 239.1 MB). Free memory was 215.0 MB in the beginning and 385.4 MB in the end (delta: -170.4 MB). Peak memory consumption was 68.7 MB. Max. memory is 3.6 GB. [2018-06-18 16:03:37,997 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 304.6 MB. Free memory is still 270.1 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 87.42 ms. Allocated memory is still 304.6 MB. Free memory was 245.0 MB in the beginning and 242.0 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 93.83 ms. Allocated memory is still 304.6 MB. Free memory was 242.0 MB in the beginning and 240.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 403.61 ms. Allocated memory is still 304.6 MB. Free memory was 240.0 MB in the beginning and 216.0 MB in the end (delta: 24.0 MB). Peak memory consumption was 24.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 10032.20 ms. Allocated memory was 304.6 MB in the beginning and 543.7 MB in the end (delta: 239.1 MB). Free memory was 215.0 MB in the beginning and 385.4 MB in the end (delta: -170.4 MB). Peak memory consumption was 68.7 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, 9.9s OverallTime, 4 OverallIterations, 4 TraceHistogramMax, 3.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 41 SDtfs, 35 SDslu, 113 SDs, 0 SdLazy, 104 SolverSat, 50 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 87 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 4.5s 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: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 5.7s InterpolantComputationTime, 111 NumberOfCodeBlocks, 111 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 104 ConstructedInterpolants, 0 QuantifiedInterpolants, 11820 SizeOfPredicates, 75 NumberOfNonLiveVariables, 1986 ConjunctsInSsa, 85 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/metros_1_e1_846_e2_1394.smt2_chcToBoogie_automizer.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-18_16-03-38-006.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/metros_1_e1_846_e2_1394.smt2_chcToBoogie_automizer.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-18_16-03-38-006.csv Received shutdown request...