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_Goto.epf -i /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_3.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 09:17:18,830 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 09:17:18,834 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 09:17:18,847 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 09:17:18,847 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 09:17:18,848 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 09:17:18,849 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 09:17:18,853 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 09:17:18,854 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 09:17:18,856 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 09:17:18,856 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 09:17:18,857 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 09:17:18,857 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 09:17:18,858 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 09:17:18,862 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 09:17:18,863 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 09:17:18,865 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 09:17:18,878 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 09:17:18,879 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 09:17:18,880 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 09:17:18,881 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 09:17:18,883 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 09:17:18,883 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 09:17:18,883 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 09:17:18,888 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 09:17:18,889 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 09:17:18,889 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 09:17:18,890 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 09:17:18,891 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 09:17:18,891 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 09:17:18,892 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 09:17:18,892 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 09:17:18,892 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 09:17:18,897 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 09:17:18,898 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 09:17:18,898 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 09:17:18,919 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 09:17:18,920 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 09:17:18,920 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 09:17:18,920 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 09:17:18,921 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 09:17:18,921 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 09:17:18,922 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 09:17:18,922 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 09:17:18,922 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 09:17:18,922 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 09:17:18,923 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 09:17:18,923 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 09:17:18,923 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 09:17:18,923 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 09:17:18,923 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 09:17:18,924 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 09:17:18,924 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 09:17:18,925 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 09:17:18,925 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 09:17:18,976 INFO ]: Repository-Root is: /tmp [2018-06-22 09:17:18,988 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 09:17:18,994 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 09:17:18,995 INFO ]: Initializing SmtParser... [2018-06-22 09:17:18,995 INFO ]: SmtParser initialized [2018-06-22 09:17:18,996 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_3.smt2 [2018-06-22 09:17:18,997 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 09:17:19,085 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_3.smt2 unknown [2018-06-22 09:17:19,615 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_3.smt2 [2018-06-22 09:17:19,624 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 09:17:19,639 INFO ]: Walking toolchain with 4 elements. [2018-06-22 09:17:19,639 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 09:17:19,639 INFO ]: Initializing ChcToBoogie... [2018-06-22 09:17:19,640 INFO ]: ChcToBoogie initialized [2018-06-22 09:17:19,643 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 09:17:19" (1/1) ... [2018-06-22 09:17:19,736 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 09:17:19 Unit [2018-06-22 09:17:19,736 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 09:17:19,737 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 09:17:19,737 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 09:17:19,737 INFO ]: Boogie Preprocessor initialized [2018-06-22 09:17:19,752 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 09:17:19" (1/1) ... [2018-06-22 09:17:19,752 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 09:17:19" (1/1) ... [2018-06-22 09:17:19,761 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 09:17:19" (1/1) ... [2018-06-22 09:17:19,762 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 09:17:19" (1/1) ... [2018-06-22 09:17:19,768 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 09:17:19" (1/1) ... [2018-06-22 09:17:19,769 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 09:17:19" (1/1) ... [2018-06-22 09:17:19,772 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 09:17:19" (1/1) ... [2018-06-22 09:17:19,775 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 09:17:19,776 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 09:17:19,776 INFO ]: Initializing RCFGBuilder... [2018-06-22 09:17:19,776 INFO ]: RCFGBuilder initialized [2018-06-22 09:17:19,777 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 09:17:19" (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 [2018-06-22 09:17:19,801 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 09:17:19,801 INFO ]: Found specification of procedure gotoProc [2018-06-22 09:17:19,801 INFO ]: Found implementation of procedure gotoProc [2018-06-22 09:17:19,801 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 09:17:19,801 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 09:17:19,801 INFO ]: Found implementation of procedure Ultimate.START [2018-06-22 09:17:20,230 INFO ]: Using library mode [2018-06-22 09:17:20,232 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 09:17:20 BoogieIcfgContainer [2018-06-22 09:17:20,232 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 09:17:20,233 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 09:17:20,233 INFO ]: Initializing TraceAbstraction... [2018-06-22 09:17:20,238 INFO ]: TraceAbstraction initialized [2018-06-22 09:17:20,239 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 09:17:19" (1/3) ... [2018-06-22 09:17:20,239 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@252bd1aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 09:17:20, skipping insertion in model container [2018-06-22 09:17:20,239 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 09:17:19" (2/3) ... [2018-06-22 09:17:20,240 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@252bd1aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 09:17:20, skipping insertion in model container [2018-06-22 09:17:20,240 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 09:17:20" (3/3) ... [2018-06-22 09:17:20,241 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 09:17:20,252 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 09:17:20,260 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 09:17:20,308 INFO ]: Using default assertion order modulation [2018-06-22 09:17:20,309 INFO ]: Interprodecural is true [2018-06-22 09:17:20,309 INFO ]: Hoare is false [2018-06-22 09:17:20,309 INFO ]: Compute interpolants for FPandBP [2018-06-22 09:17:20,309 INFO ]: Backedges is TWOTRACK [2018-06-22 09:17:20,309 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 09:17:20,309 INFO ]: Difference is false [2018-06-22 09:17:20,309 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 09:17:20,309 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 09:17:20,331 INFO ]: Start isEmpty. Operand 10 states. [2018-06-22 09:17:20,346 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-22 09:17:20,346 INFO ]: Found error trace [2018-06-22 09:17:20,347 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-22 09:17:20,347 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 09:17:20,353 INFO ]: Analyzing trace with hash 1284994894, now seen corresponding path program 1 times [2018-06-22 09:17:20,355 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 09:17:20,356 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 09:17:20,399 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 09:17:20,399 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 09:17:20,399 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 09:17:20,498 INFO ]: Conjunction of SSA is unsat [2018-06-22 09:17:20,605 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 09:17:20,607 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 09:17:20,607 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 09:17:20,609 INFO ]: Interpolant automaton has 3 states [2018-06-22 09:17:20,620 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 09:17:20,620 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 09:17:20,622 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-22 09:17:20,701 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 09:17:20,702 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-22 09:17:20,702 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 09:17:20,703 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-22 09:17:20,704 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 09:17:20,714 INFO ]: With dead ends: 9 [2018-06-22 09:17:20,715 INFO ]: Without dead ends: 9 [2018-06-22 09:17:20,718 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 09:17:20,731 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-22 09:17:20,758 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-22 09:17:20,759 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-22 09:17:20,760 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-22 09:17:20,760 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-22 09:17:20,761 INFO ]: Finished accepts. word is rejected. [2018-06-22 09:17:20,761 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-22 09:17:20,761 INFO ]: Interpolant automaton has 3 states. [2018-06-22 09:17:20,761 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-22 09:17:20,761 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 09:17:20,761 INFO ]: Found error trace [2018-06-22 09:17:20,761 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 09:17:20,761 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 09:17:20,761 INFO ]: Analyzing trace with hash 1180964567, now seen corresponding path program 1 times [2018-06-22 09:17:20,761 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 09:17:20,761 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 09:17:20,762 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 09:17:20,762 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 09:17:20,762 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 09:17:20,871 INFO ]: Conjunction of SSA is unsat [2018-06-22 09:17:21,087 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 09:17:21,087 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 09:17:21,087 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 09:17:21,104 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 09:17:21,272 INFO ]: Conjunction of SSA is unsat [2018-06-22 09:17:21,282 INFO ]: Computing forward predicates... [2018-06-22 09:17:21,575 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 09:17:21,608 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 09:17:21,608 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-06-22 09:17:21,609 INFO ]: Interpolant automaton has 6 states [2018-06-22 09:17:21,609 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 09:17:21,609 INFO ]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-06-22 09:17:21,609 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 6 states. [2018-06-22 09:17:21,778 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 09:17:21,779 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-22 09:17:21,779 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-22 09:17:21,780 INFO ]: Start accepts. Automaton has 6 states. Word has length 8 [2018-06-22 09:17:21,780 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 09:17:21,780 INFO ]: With dead ends: 11 [2018-06-22 09:17:21,780 INFO ]: Without dead ends: 11 [2018-06-22 09:17:21,781 INFO ]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-06-22 09:17:21,781 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-22 09:17:21,782 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-22 09:17:21,782 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-22 09:17:21,782 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-22 09:17:21,782 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-06-22 09:17:21,782 INFO ]: Finished accepts. word is rejected. [2018-06-22 09:17:21,782 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-22 09:17:21,782 INFO ]: Interpolant automaton has 6 states. [2018-06-22 09:17:21,783 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-22 09:17:21,783 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-22 09:17:21,783 INFO ]: Found error trace [2018-06-22 09:17:21,783 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 09:17:21,783 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 09:17:21,783 INFO ]: Analyzing trace with hash 1062095287, now seen corresponding path program 2 times [2018-06-22 09:17:21,783 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 09:17:21,783 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 09:17:21,786 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 09:17:21,786 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 09:17:21,786 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 09:17:22,000 INFO ]: Conjunction of SSA is unsat [2018-06-22 09:17:22,374 WARN ]: Spent 163.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 12 [2018-06-22 09:17:22,512 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 09:17:22,512 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 09:17:22,512 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 09:17:22,518 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 09:17:22,739 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 09:17:22,739 INFO ]: Conjunction of SSA is unsat [2018-06-22 09:17:22,748 INFO ]: Computing forward predicates... [2018-06-22 09:17:23,228 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 09:17:23,249 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 09:17:23,249 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2018-06-22 09:17:23,249 INFO ]: Interpolant automaton has 10 states [2018-06-22 09:17:23,249 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-22 09:17:23,249 INFO ]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2018-06-22 09:17:23,250 INFO ]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-06-22 09:17:23,393 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 09:17:23,393 INFO ]: Finished difference Result 13 states and 13 transitions. [2018-06-22 09:17:23,394 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 09:17:23,394 INFO ]: Start accepts. Automaton has 10 states. Word has length 10 [2018-06-22 09:17:23,394 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 09:17:23,394 INFO ]: With dead ends: 13 [2018-06-22 09:17:23,394 INFO ]: Without dead ends: 13 [2018-06-22 09:17:23,395 INFO ]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2018-06-22 09:17:23,395 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 09:17:23,395 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 09:17:23,395 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 09:17:23,396 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-06-22 09:17:23,396 INFO ]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-06-22 09:17:23,396 INFO ]: Finished accepts. word is rejected. [2018-06-22 09:17:23,396 INFO ]: Abstraction has 13 states and 13 transitions. [2018-06-22 09:17:23,396 INFO ]: Interpolant automaton has 10 states. [2018-06-22 09:17:23,396 INFO ]: Start isEmpty. Operand 13 states and 13 transitions. [2018-06-22 09:17:23,396 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-22 09:17:23,396 INFO ]: Found error trace [2018-06-22 09:17:23,396 INFO ]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 09:17:23,396 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 09:17:23,397 INFO ]: Analyzing trace with hash -1502133097, now seen corresponding path program 3 times [2018-06-22 09:17:23,397 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 09:17:23,397 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 09:17:23,397 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 09:17:23,397 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 09:17:23,397 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 09:17:23,663 INFO ]: Conjunction of SSA is unsat [2018-06-22 09:17:29,392 WARN ]: Spent 1.08 s on a formula simplification. DAG size of input: 239 DAG size of output: 12 [2018-06-22 09:17:30,915 WARN ]: Spent 1.38 s on a formula simplification. DAG size of input: 438 DAG size of output: 12 [2018-06-22 09:17:33,006 WARN ]: Spent 2.03 s on a formula simplification. DAG size of input: 328 DAG size of output: 20 [2018-06-22 09:17:34,541 WARN ]: Spent 1.47 s on a formula simplification. DAG size of input: 334 DAG size of output: 31 [2018-06-22 09:17:34,579 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 09:17:34,579 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 09:17:34,579 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 09:17:34,587 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 09:17:34,826 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 09:17:34,827 INFO ]: Conjunction of SSA is unsat [2018-06-22 09:17:34,836 INFO ]: Computing forward predicates... [2018-06-22 09:17:35,152 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 09:17:35,173 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 09:17:35,173 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2018-06-22 09:17:35,173 INFO ]: Interpolant automaton has 14 states [2018-06-22 09:17:35,173 INFO ]: Constructing interpolant automaton starting with 14 interpolants. [2018-06-22 09:17:35,174 INFO ]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2018-06-22 09:17:35,174 INFO ]: Start difference. First operand 13 states and 13 transitions. Second operand 14 states. [2018-06-22 09:17:35,394 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 09:17:35,394 INFO ]: Finished difference Result 15 states and 15 transitions. [2018-06-22 09:17:35,395 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 09:17:35,395 INFO ]: Start accepts. Automaton has 14 states. Word has length 12 [2018-06-22 09:17:35,395 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 09:17:35,395 INFO ]: With dead ends: 15 [2018-06-22 09:17:35,395 INFO ]: Without dead ends: 15 [2018-06-22 09:17:35,396 INFO ]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2018-06-22 09:17:35,396 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 09:17:35,397 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 09:17:35,397 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 09:17:35,398 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-06-22 09:17:35,398 INFO ]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-06-22 09:17:35,398 INFO ]: Finished accepts. word is rejected. [2018-06-22 09:17:35,398 INFO ]: Abstraction has 15 states and 15 transitions. [2018-06-22 09:17:35,398 INFO ]: Interpolant automaton has 14 states. [2018-06-22 09:17:35,398 INFO ]: Start isEmpty. Operand 15 states and 15 transitions. [2018-06-22 09:17:35,398 INFO ]: Finished isEmpty. Found accepting run of length 15 [2018-06-22 09:17:35,398 INFO ]: Found error trace [2018-06-22 09:17:35,398 INFO ]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 09:17:35,399 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 09:17:35,399 INFO ]: Analyzing trace with hash -414382217, now seen corresponding path program 4 times [2018-06-22 09:17:35,399 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 09:17:35,399 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 09:17:35,399 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 09:17:35,399 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 09:17:35,399 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 09:17:36,917 INFO ]: Conjunction of SSA is unsat Received shutdown request... [2018-06-22 09:18:32,956 FATAL]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Timeout exceeded at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.walkLeafNode(Interpolator.java:265) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.access$1(Interpolator.java:263) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator$ProofTreeWalker.walk(Interpolator.java:132) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:122) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:113) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.interpolate(Interpolator.java:220) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:201) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:919) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.managedscript.ManagedScript.getInterpolants(ManagedScript.java:199) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:282) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsTree(InterpolatingTraceCheckCraig.java:271) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:207) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructCraig(TraceCheckConstructor.java:210) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructTraceCheck(TraceCheckConstructor.java:180) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.get(TraceCheckConstructor.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.MultiTrackRefinementStrategy.getTraceCheck(MultiTrackRefinementStrategy.java:228) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.checkFeasibility(BaseRefinementStrategy.java:220) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:194) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:70) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:410) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:425) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:367) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:309) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:151) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:119) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:324) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.runToolchainDefault(DefaultToolchainJob.java:221) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.BasicToolchainJob.run(BasicToolchainJob.java:134) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2018-06-22 09:18:32,960 INFO ]: Toolchain (without parser) took 73335.15 ms. Allocated memory was 306.7 MB in the beginning and 960.5 MB in the end (delta: 653.8 MB). Free memory was 246.1 MB in the beginning and 523.2 MB in the end (delta: -277.0 MB). Peak memory consumption was 645.8 MB. Max. memory is 3.6 GB. [2018-06-22 09:18:32,961 INFO ]: SmtParser took 0.08 ms. Allocated memory is still 306.7 MB. Free memory is still 270.2 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 09:18:32,961 INFO ]: ChcToBoogie took 97.32 ms. Allocated memory is still 306.7 MB. Free memory was 246.1 MB in the beginning and 243.2 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. [2018-06-22 09:18:32,962 INFO ]: Boogie Preprocessor took 38.16 ms. Allocated memory is still 306.7 MB. Free memory was 243.2 MB in the beginning and 242.2 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. [2018-06-22 09:18:32,962 INFO ]: RCFGBuilder took 455.86 ms. Allocated memory is still 306.7 MB. Free memory was 241.2 MB in the beginning and 210.1 MB in the end (delta: 31.1 MB). Peak memory consumption was 31.1 MB. Max. memory is 3.6 GB. [2018-06-22 09:18:32,962 INFO ]: TraceAbstraction took 72725.99 ms. Allocated memory was 306.7 MB in the beginning and 960.5 MB in the end (delta: 653.8 MB). Free memory was 210.1 MB in the beginning and 523.5 MB in the end (delta: -313.5 MB). Peak memory consumption was 609.7 MB. Max. memory is 3.6 GB. [2018-06-22 09:18:32,965 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.08 ms. Allocated memory is still 306.7 MB. Free memory is still 270.2 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 97.32 ms. Allocated memory is still 306.7 MB. Free memory was 246.1 MB in the beginning and 243.2 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 38.16 ms. Allocated memory is still 306.7 MB. Free memory was 243.2 MB in the beginning and 242.2 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. * RCFGBuilder took 455.86 ms. Allocated memory is still 306.7 MB. Free memory was 241.2 MB in the beginning and 210.1 MB in the end (delta: 31.1 MB). Peak memory consumption was 31.1 MB. Max. memory is 3.6 GB. * TraceAbstraction took 72725.99 ms. Allocated memory was 306.7 MB in the beginning and 960.5 MB in the end (delta: 653.8 MB). Free memory was 210.1 MB in the beginning and 523.5 MB in the end (delta: -313.5 MB). Peak memory consumption was 609.7 MB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: Timeout exceeded de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: Timeout exceeded: de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.walkLeafNode(Interpolator.java:265) RESULT: Ultimate could not prove your program: Toolchain returned no result. Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/metros_3.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_09-18-32-975.csv Completed graceful shutdown