java -Xss1g -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/chc/AutomizerCHC/AutomizerCHC_No_Goto.epf -i /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_4_e2_968_e3_931.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 19:22:03,714 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 19:22:03,716 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 19:22:03,731 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 19:22:03,731 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 19:22:03,732 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 19:22:03,733 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 19:22:03,735 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 19:22:03,736 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 19:22:03,737 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 19:22:03,738 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 19:22:03,738 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 19:22:03,739 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 19:22:03,740 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 19:22:03,741 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 19:22:03,741 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 19:22:03,743 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 19:22:03,745 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 19:22:03,746 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 19:22:03,747 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 19:22:03,749 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 19:22:03,751 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 19:22:03,751 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 19:22:03,752 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 19:22:03,752 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 19:22:03,753 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 19:22:03,754 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 19:22:03,755 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 19:22:03,756 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 19:22:03,756 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 19:22:03,757 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 19:22:03,757 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 19:22:03,758 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 19:22:03,758 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 19:22:03,759 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 19:22:03,759 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_No_Goto.epf [2018-06-22 19:22:03,773 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 19:22:03,773 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 19:22:03,773 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 19:22:03,774 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 19:22:03,775 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 19:22:03,775 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 19:22:03,775 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 19:22:03,775 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 19:22:03,776 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 19:22:03,776 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 19:22:03,776 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 19:22:03,776 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 19:22:03,777 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 19:22:03,777 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 19:22:03,777 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 19:22:03,777 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 19:22:03,778 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 19:22:03,778 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 19:22:03,778 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 19:22:03,780 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 19:22:03,780 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 19:22:03,824 INFO ]: Repository-Root is: /tmp [2018-06-22 19:22:03,840 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 19:22:03,845 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 19:22:03,847 INFO ]: Initializing SmtParser... [2018-06-22 19:22:03,848 INFO ]: SmtParser initialized [2018-06-22 19:22:03,848 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_4_e2_968_e3_931.smt2 [2018-06-22 19:22:03,849 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 [2018-06-22 19:22:03,944 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_4_e2_968_e3_931.smt2 unknown [2018-06-22 19:22:04,371 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_4_e2_968_e3_931.smt2 [2018-06-22 19:22:04,376 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 19:22:04,396 INFO ]: Walking toolchain with 4 elements. [2018-06-22 19:22:04,396 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 19:22:04,396 INFO ]: Initializing ChcToBoogie... [2018-06-22 19:22:04,396 INFO ]: ChcToBoogie initialized [2018-06-22 19:22:04,399 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 07:22:04" (1/1) ... [2018-06-22 19:22:04,488 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:22:04 Unit [2018-06-22 19:22:04,488 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 19:22:04,490 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 19:22:04,490 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 19:22:04,490 INFO ]: Boogie Preprocessor initialized [2018-06-22 19:22:04,520 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:22:04" (1/1) ... [2018-06-22 19:22:04,521 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:22:04" (1/1) ... [2018-06-22 19:22:04,540 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:22:04" (1/1) ... [2018-06-22 19:22:04,540 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:22:04" (1/1) ... [2018-06-22 19:22:04,555 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:22:04" (1/1) ... [2018-06-22 19:22:04,556 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:22:04" (1/1) ... [2018-06-22 19:22:04,558 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:22:04" (1/1) ... [2018-06-22 19:22:04,561 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 19:22:04,561 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 19:22:04,561 INFO ]: Initializing RCFGBuilder... [2018-06-22 19:22:04,561 INFO ]: RCFGBuilder initialized [2018-06-22 19:22:04,562 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:22:04" (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) [2018-06-22 19:22:04,581 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 19:22:04,581 INFO ]: Found specification of procedure False [2018-06-22 19:22:04,581 INFO ]: Found implementation of procedure False [2018-06-22 19:22:04,581 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 19:22:04,581 INFO ]: Found specification of procedure state [2018-06-22 19:22:04,581 INFO ]: Found implementation of procedure state [2018-06-22 19:22:04,581 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 19:22:04,581 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 19:22:04,581 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 [2018-06-22 19:22:04,902 INFO ]: Using library mode [2018-06-22 19:22:04,902 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 07:22:04 BoogieIcfgContainer [2018-06-22 19:22:04,902 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 19:22:04,908 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 19:22:04,908 INFO ]: Initializing TraceAbstraction... [2018-06-22 19:22:04,914 INFO ]: TraceAbstraction initialized [2018-06-22 19:22:04,914 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 07:22:04" (1/3) ... [2018-06-22 19:22:04,915 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d13e891 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 07:22:04, skipping insertion in model container [2018-06-22 19:22:04,915 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:22:04" (2/3) ... [2018-06-22 19:22:04,915 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d13e891 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 07:22:04, skipping insertion in model container [2018-06-22 19:22:04,915 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 07:22:04" (3/3) ... [2018-06-22 19:22:04,918 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 19:22:04,928 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 19:22:04,939 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 19:22:04,991 INFO ]: Using default assertion order modulation [2018-06-22 19:22:04,992 INFO ]: Interprodecural is true [2018-06-22 19:22:04,992 INFO ]: Hoare is false [2018-06-22 19:22:04,992 INFO ]: Compute interpolants for FPandBP [2018-06-22 19:22:04,992 INFO ]: Backedges is TWOTRACK [2018-06-22 19:22:04,992 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 19:22:04,992 INFO ]: Difference is false [2018-06-22 19:22:04,992 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 19:22:04,992 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 19:22:05,005 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 19:22:05,017 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 19:22:05,017 INFO ]: Found error trace [2018-06-22 19:22:05,018 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:22:05,018 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:22:05,024 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-22 19:22:05,026 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:22:05,027 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:22:05,070 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:22:05,070 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:22:05,070 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:22:05,183 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:22:05,313 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 19:22:05,315 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 19:22:05,315 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 19:22:05,316 INFO ]: Interpolant automaton has 4 states [2018-06-22 19:22:05,327 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 19:22:05,327 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 19:22:05,329 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 19:22:05,462 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:22:05,462 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 19:22:05,463 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 19:22:05,464 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 19:22:05,464 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:22:05,473 INFO ]: With dead ends: 13 [2018-06-22 19:22:05,473 INFO ]: Without dead ends: 13 [2018-06-22 19:22:05,475 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 [2018-06-22 19:22:05,489 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 19:22:05,522 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 19:22:05,523 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 19:22:05,524 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 19:22:05,524 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 19:22:05,525 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:22:05,525 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 19:22:05,525 INFO ]: Interpolant automaton has 4 states. [2018-06-22 19:22:05,525 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 19:22:05,526 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 19:22:05,526 INFO ]: Found error trace [2018-06-22 19:22:05,526 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:22:05,526 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:22:05,526 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-22 19:22:05,526 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:22:05,526 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:22:05,527 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:22:05,527 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:22:05,527 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:22:05,598 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:22:06,011 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 19:22:06,011 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:22:06,011 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 [2018-06-22 19:22:06,019 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:22:06,138 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:22:06,148 INFO ]: Computing forward predicates... [2018-06-22 19:22:06,554 WARN ]: Spent 225.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 7 [2018-06-22 19:22:06,987 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 19:22:07,012 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:22:07,012 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-06-22 19:22:07,013 INFO ]: Interpolant automaton has 9 states [2018-06-22 19:22:07,013 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 19:22:07,013 INFO ]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-06-22 19:22:07,013 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 9 states. [2018-06-22 19:22:07,376 WARN ]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-06-22 19:22:07,734 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:22:07,734 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 19:22:07,735 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 19:22:07,735 INFO ]: Start accepts. Automaton has 9 states. Word has length 13 [2018-06-22 19:22:07,735 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:22:07,736 INFO ]: With dead ends: 15 [2018-06-22 19:22:07,736 INFO ]: Without dead ends: 15 [2018-06-22 19:22:07,737 INFO ]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2018-06-22 19:22:07,737 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 19:22:07,739 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 19:22:07,739 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 19:22:07,739 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 19:22:07,740 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 19:22:07,741 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:22:07,742 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 19:22:07,742 INFO ]: Interpolant automaton has 9 states. [2018-06-22 19:22:07,742 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 19:22:07,742 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 19:22:07,742 INFO ]: Found error trace [2018-06-22 19:22:07,742 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:22:07,742 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:22:07,742 INFO ]: Analyzing trace with hash -1486246934, now seen corresponding path program 2 times [2018-06-22 19:22:07,743 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:22:07,743 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:22:07,743 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:22:07,743 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:22:07,743 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:22:07,871 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:22:08,210 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 19:22:08,210 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:22:08,262 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 [2018-06-22 19:22:08,270 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 19:22:08,392 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 19:22:08,392 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:22:08,398 INFO ]: Computing forward predicates... [2018-06-22 19:22:08,681 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 19:22:08,702 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:22:08,702 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2018-06-22 19:22:08,702 INFO ]: Interpolant automaton has 13 states [2018-06-22 19:22:08,702 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-22 19:22:08,702 INFO ]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2018-06-22 19:22:08,703 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 13 states. [2018-06-22 19:22:08,996 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:22:08,996 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 19:22:08,997 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 19:22:08,997 INFO ]: Start accepts. Automaton has 13 states. Word has length 17 [2018-06-22 19:22:08,997 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:22:08,998 INFO ]: With dead ends: 17 [2018-06-22 19:22:08,998 INFO ]: Without dead ends: 17 [2018-06-22 19:22:08,998 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2018-06-22 19:22:08,998 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 19:22:09,001 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 19:22:09,001 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 19:22:09,002 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 19:22:09,002 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 19:22:09,002 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:22:09,002 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 19:22:09,002 INFO ]: Interpolant automaton has 13 states. [2018-06-22 19:22:09,002 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 19:22:09,003 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 19:22:09,003 INFO ]: Found error trace [2018-06-22 19:22:09,003 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:22:09,003 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:22:09,003 INFO ]: Analyzing trace with hash -2056434034, now seen corresponding path program 3 times [2018-06-22 19:22:09,003 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:22:09,003 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:22:09,004 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:22:09,004 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 19:22:09,004 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:22:09,108 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:22:09,583 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 19:22:09,584 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:22:09,584 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 [2018-06-22 19:22:09,592 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 19:22:09,765 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 19:22:09,765 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:22:09,773 INFO ]: Computing forward predicates... [2018-06-22 19:22:10,152 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 19:22:10,182 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:22:10,182 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2018-06-22 19:22:10,182 INFO ]: Interpolant automaton has 16 states [2018-06-22 19:22:10,182 INFO ]: Constructing interpolant automaton starting with 16 interpolants. [2018-06-22 19:22:10,183 INFO ]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2018-06-22 19:22:10,183 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 16 states. [2018-06-22 19:22:10,382 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:22:10,382 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 19:22:10,382 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 19:22:10,382 INFO ]: Start accepts. Automaton has 16 states. Word has length 21 [2018-06-22 19:22:10,383 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:22:10,383 INFO ]: With dead ends: 13 [2018-06-22 19:22:10,383 INFO ]: Without dead ends: 0 [2018-06-22 19:22:10,383 INFO ]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2018-06-22 19:22:10,383 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-22 19:22:10,383 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-22 19:22:10,383 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-22 19:22:10,383 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-22 19:22:10,383 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2018-06-22 19:22:10,383 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:22:10,383 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-22 19:22:10,383 INFO ]: Interpolant automaton has 16 states. [2018-06-22 19:22:10,383 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-22 19:22:10,383 INFO ]: Finished isEmpty. No accepting run. [2018-06-22 19:22:10,388 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 07:22:10 BoogieIcfgContainer [2018-06-22 19:22:10,388 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 19:22:10,389 INFO ]: Toolchain (without parser) took 6012.24 ms. Allocated memory was 308.3 MB in the beginning and 388.5 MB in the end (delta: 80.2 MB). Free memory was 249.7 MB in the beginning and 320.5 MB in the end (delta: -70.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 3.6 GB. [2018-06-22 19:22:10,390 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 308.3 MB. Free memory is still 273.8 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 19:22:10,390 INFO ]: ChcToBoogie took 92.44 ms. Allocated memory is still 308.3 MB. Free memory was 249.7 MB in the beginning and 247.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 19:22:10,391 INFO ]: Boogie Preprocessor took 70.96 ms. Allocated memory is still 308.3 MB. Free memory was 247.7 MB in the beginning and 245.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 19:22:10,391 INFO ]: RCFGBuilder took 340.82 ms. Allocated memory is still 308.3 MB. Free memory was 245.7 MB in the beginning and 221.7 MB in the end (delta: 24.0 MB). Peak memory consumption was 24.0 MB. Max. memory is 3.6 GB. [2018-06-22 19:22:10,392 INFO ]: TraceAbstraction took 5480.32 ms. Allocated memory was 308.3 MB in the beginning and 388.5 MB in the end (delta: 80.2 MB). Free memory was 221.7 MB in the beginning and 320.5 MB in the end (delta: -98.8 MB). There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 19:22:10,395 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 308.3 MB. Free memory is still 273.8 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 92.44 ms. Allocated memory is still 308.3 MB. Free memory was 249.7 MB in the beginning and 247.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 70.96 ms. Allocated memory is still 308.3 MB. Free memory was 247.7 MB in the beginning and 245.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 340.82 ms. Allocated memory is still 308.3 MB. Free memory was 245.7 MB in the beginning and 221.7 MB in the end (delta: 24.0 MB). Peak memory consumption was 24.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 5480.32 ms. Allocated memory was 308.3 MB in the beginning and 388.5 MB in the end (delta: 80.2 MB). Free memory was 221.7 MB in the beginning and 320.5 MB in the end (delta: -98.8 MB). There was no memory consumed. 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, 5.4s OverallTime, 4 OverallIterations, 4 TraceHistogramMax, 1.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 40 SDtfs, 25 SDslu, 140 SDs, 0 SdLazy, 120 SolverSat, 42 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 85 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 2.4s 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, 2.8s InterpolantComputationTime, 111 NumberOfCodeBlocks, 111 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 104 ConstructedInterpolants, 0 QuantifiedInterpolants, 6952 SizeOfPredicates, 64 NumberOfNonLiveVariables, 1944 ConjunctsInSsa, 78 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_4_e2_968_e3_931.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_19-22-10-404.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/metros_4_e2_968_e3_931.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_19-22-10-404.csv Received shutdown request...