java -Xss4m -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_5_e4_1208_e1_337.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-14921ce [2018-06-25 16:56:53,885 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-25 16:56:53,887 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-25 16:56:53,905 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-25 16:56:53,906 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-25 16:56:53,907 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-25 16:56:53,908 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-25 16:56:53,913 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-25 16:56:53,917 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-25 16:56:53,918 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-25 16:56:53,919 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-25 16:56:53,919 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-25 16:56:53,922 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-25 16:56:53,924 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-25 16:56:53,925 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-25 16:56:53,928 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-25 16:56:53,930 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-25 16:56:53,933 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-25 16:56:53,934 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-25 16:56:53,936 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-25 16:56:53,937 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-25 16:56:53,940 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-25 16:56:53,940 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-25 16:56:53,940 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-25 16:56:53,941 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-25 16:56:53,943 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-25 16:56:53,943 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-25 16:56:53,944 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-25 16:56:53,946 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-25 16:56:53,946 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-25 16:56:53,947 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-25 16:56:53,948 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-25 16:56:53,948 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-25 16:56:53,949 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-25 16:56:53,950 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-25 16:56:53,950 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-25 16:56:53,973 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-25 16:56:53,974 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-25 16:56:53,974 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-25 16:56:53,974 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-25 16:56:53,975 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-25 16:56:53,976 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-25 16:56:53,976 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-25 16:56:53,976 INFO L133 SettingsManager]: * Use SBE=true [2018-06-25 16:56:53,983 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-25 16:56:53,983 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-25 16:56:53,983 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-25 16:56:53,983 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-25 16:56:53,984 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-25 16:56:53,984 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-25 16:56:53,984 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-25 16:56:53,984 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-25 16:56:53,984 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-25 16:56:53,985 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-25 16:56:53,985 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-25 16:56:53,985 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-25 16:56:53,985 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-25 16:56:53,987 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-25 16:56:53,987 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-25 16:56:54,053 INFO ]: Repository-Root is: /tmp [2018-06-25 16:56:54,073 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-25 16:56:54,079 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-25 16:56:54,081 INFO ]: Initializing SmtParser... [2018-06-25 16:56:54,081 INFO ]: SmtParser initialized [2018-06-25 16:56:54,082 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_5_e4_1208_e1_337.smt2 [2018-06-25 16:56:54,083 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 [2018-06-25 16:56:54,209 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_5_e4_1208_e1_337.smt2 unknown [2018-06-25 16:56:54,776 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_5_e4_1208_e1_337.smt2 [2018-06-25 16:56:54,787 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-25 16:56:54,798 INFO ]: Walking toolchain with 4 elements. [2018-06-25 16:56:54,808 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-25 16:56:54,808 INFO ]: Initializing ChcToBoogie... [2018-06-25 16:56:54,808 INFO ]: ChcToBoogie initialized [2018-06-25 16:56:54,812 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 04:56:54" (1/1) ... [2018-06-25 16:56:54,929 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:56:54 Unit [2018-06-25 16:56:54,929 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-25 16:56:54,930 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-25 16:56:54,930 INFO ]: Initializing Boogie Preprocessor... [2018-06-25 16:56:54,930 INFO ]: Boogie Preprocessor initialized [2018-06-25 16:56:54,962 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:56:54" (1/1) ... [2018-06-25 16:56:54,963 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:56:54" (1/1) ... [2018-06-25 16:56:54,985 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:56:54" (1/1) ... [2018-06-25 16:56:54,985 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:56:54" (1/1) ... [2018-06-25 16:56:54,991 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:56:54" (1/1) ... [2018-06-25 16:56:55,007 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:56:54" (1/1) ... [2018-06-25 16:56:55,012 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:56:54" (1/1) ... [2018-06-25 16:56:55,025 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-25 16:56:55,026 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-25 16:56:55,026 INFO ]: Initializing RCFGBuilder... [2018-06-25 16:56:55,026 INFO ]: RCFGBuilder initialized [2018-06-25 16:56:55,027 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:56:54" (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 [2018-06-25 16:56:55,065 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-25 16:56:55,065 INFO ]: Found specification of procedure gotoProc [2018-06-25 16:56:55,065 INFO ]: Found implementation of procedure gotoProc [2018-06-25 16:56:55,065 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-25 16:56:55,066 INFO ]: Found specification of procedure Ultimate.START [2018-06-25 16:56:55,066 INFO ]: Found implementation of procedure Ultimate.START [2018-06-25 16:56:55,568 INFO ]: Using library mode [2018-06-25 16:56:55,569 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 04:56:55 BoogieIcfgContainer [2018-06-25 16:56:55,569 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-25 16:56:55,571 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-25 16:56:55,571 INFO ]: Initializing TraceAbstraction... [2018-06-25 16:56:55,575 INFO ]: TraceAbstraction initialized [2018-06-25 16:56:55,575 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 04:56:54" (1/3) ... [2018-06-25 16:56:55,585 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3af1ca8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 25.06 04:56:55, skipping insertion in model container [2018-06-25 16:56:55,586 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:56:54" (2/3) ... [2018-06-25 16:56:55,586 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3af1ca8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.06 04:56:55, skipping insertion in model container [2018-06-25 16:56:55,586 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 04:56:55" (3/3) ... [2018-06-25 16:56:55,595 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-25 16:56:55,609 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-25 16:56:55,620 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-25 16:56:55,680 INFO ]: Using default assertion order modulation [2018-06-25 16:56:55,680 INFO ]: Interprodecural is true [2018-06-25 16:56:55,680 INFO ]: Hoare is false [2018-06-25 16:56:55,680 INFO ]: Compute interpolants for FPandBP [2018-06-25 16:56:55,680 INFO ]: Backedges is TWOTRACK [2018-06-25 16:56:55,680 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-25 16:56:55,680 INFO ]: Difference is false [2018-06-25 16:56:55,680 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-25 16:56:55,680 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-25 16:56:55,699 INFO ]: Start isEmpty. Operand 10 states. [2018-06-25 16:56:55,719 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-25 16:56:55,719 INFO ]: Found error trace [2018-06-25 16:56:55,720 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-25 16:56:55,720 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 16:56:55,728 INFO ]: Analyzing trace with hash 1284994894, now seen corresponding path program 1 times [2018-06-25 16:56:55,731 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 16:56:55,732 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 16:56:55,788 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:56:55,788 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 16:56:55,788 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:56:55,931 INFO ]: Conjunction of SSA is unsat [2018-06-25 16:56:56,092 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 16:56:56,102 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-25 16:56:56,102 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-25 16:56:56,108 INFO ]: Interpolant automaton has 3 states [2018-06-25 16:56:56,137 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-25 16:56:56,137 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 16:56:56,143 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-25 16:56:56,247 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 16:56:56,248 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-25 16:56:56,250 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-25 16:56:56,257 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-25 16:56:56,257 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 16:56:56,266 INFO ]: With dead ends: 9 [2018-06-25 16:56:56,266 INFO ]: Without dead ends: 9 [2018-06-25 16:56:56,269 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 [2018-06-25 16:56:56,289 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-25 16:56:56,324 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-25 16:56:56,326 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-25 16:56:56,326 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-25 16:56:56,328 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-25 16:56:56,328 INFO ]: Finished accepts. word is rejected. [2018-06-25 16:56:56,328 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-25 16:56:56,328 INFO ]: Interpolant automaton has 3 states. [2018-06-25 16:56:56,328 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-25 16:56:56,328 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-25 16:56:56,328 INFO ]: Found error trace [2018-06-25 16:56:56,328 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 16:56:56,328 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 16:56:56,329 INFO ]: Analyzing trace with hash 1180964567, now seen corresponding path program 1 times [2018-06-25 16:56:56,329 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 16:56:56,329 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 16:56:56,338 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:56:56,338 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 16:56:56,338 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:56:56,530 INFO ]: Conjunction of SSA is unsat [2018-06-25 16:56:56,972 WARN ]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-06-25 16:56:56,973 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 16:56:56,973 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 16:56:56,973 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) [2018-06-25 16:56:57,026 INFO ]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 16:56:57,259 INFO ]: Conjunction of SSA is unsat [2018-06-25 16:56:57,276 INFO ]: Computing forward predicates... [2018-06-25 16:56:57,487 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 16:56:57,543 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 16:56:57,543 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-06-25 16:56:57,544 INFO ]: Interpolant automaton has 6 states [2018-06-25 16:56:57,544 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-25 16:56:57,544 INFO ]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-06-25 16:56:57,544 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 6 states. [2018-06-25 16:56:57,720 WARN ]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2018-06-25 16:56:57,833 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 16:56:57,833 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-25 16:56:57,834 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-25 16:56:57,834 INFO ]: Start accepts. Automaton has 6 states. Word has length 8 [2018-06-25 16:56:57,834 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 16:56:57,834 INFO ]: With dead ends: 11 [2018-06-25 16:56:57,834 INFO ]: Without dead ends: 11 [2018-06-25 16:56:57,835 INFO ]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-06-25 16:56:57,835 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-25 16:56:57,836 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-25 16:56:57,836 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-25 16:56:57,837 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-25 16:56:57,837 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-06-25 16:56:57,837 INFO ]: Finished accepts. word is rejected. [2018-06-25 16:56:57,837 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-25 16:56:57,837 INFO ]: Interpolant automaton has 6 states. [2018-06-25 16:56:57,837 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-25 16:56:57,837 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-25 16:56:57,837 INFO ]: Found error trace [2018-06-25 16:56:57,837 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 16:56:57,837 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 16:56:57,841 INFO ]: Analyzing trace with hash 1062095287, now seen corresponding path program 2 times [2018-06-25 16:56:57,841 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 16:56:57,841 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 16:56:57,842 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:56:57,842 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 16:56:57,842 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:56:58,169 INFO ]: Conjunction of SSA is unsat [2018-06-25 16:56:59,397 WARN ]: Spent 816.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 25 [2018-06-25 16:57:00,097 WARN ]: Spent 648.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 36 [2018-06-25 16:57:00,116 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 16:57:00,116 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 16:57:00,116 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 [2018-06-25 16:57:00,126 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-25 16:57:00,342 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-25 16:57:00,342 INFO ]: Conjunction of SSA is unsat [2018-06-25 16:57:00,351 INFO ]: Computing forward predicates... [2018-06-25 16:57:00,961 WARN ]: Spent 171.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 9 [2018-06-25 16:57:01,161 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 16:57:01,193 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 16:57:01,193 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2018-06-25 16:57:01,194 INFO ]: Interpolant automaton has 10 states [2018-06-25 16:57:01,195 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-25 16:57:01,195 INFO ]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-06-25 16:57:01,195 INFO ]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-06-25 16:57:01,867 WARN ]: Spent 606.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2018-06-25 16:57:02,092 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 16:57:02,092 INFO ]: Finished difference Result 13 states and 13 transitions. [2018-06-25 16:57:02,094 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-25 16:57:02,094 INFO ]: Start accepts. Automaton has 10 states. Word has length 10 [2018-06-25 16:57:02,094 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 16:57:02,094 INFO ]: With dead ends: 13 [2018-06-25 16:57:02,094 INFO ]: Without dead ends: 13 [2018-06-25 16:57:02,095 INFO ]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2018-06-25 16:57:02,095 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-25 16:57:02,096 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-25 16:57:02,096 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-25 16:57:02,096 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-06-25 16:57:02,097 INFO ]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-06-25 16:57:02,097 INFO ]: Finished accepts. word is rejected. [2018-06-25 16:57:02,097 INFO ]: Abstraction has 13 states and 13 transitions. [2018-06-25 16:57:02,097 INFO ]: Interpolant automaton has 10 states. [2018-06-25 16:57:02,097 INFO ]: Start isEmpty. Operand 13 states and 13 transitions. [2018-06-25 16:57:02,097 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-25 16:57:02,097 INFO ]: Found error trace [2018-06-25 16:57:02,097 INFO ]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 16:57:02,097 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 16:57:02,097 INFO ]: Analyzing trace with hash -1502133097, now seen corresponding path program 3 times [2018-06-25 16:57:02,097 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 16:57:02,097 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 16:57:02,099 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:57:02,100 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 16:57:02,100 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:57:02,468 INFO ]: Conjunction of SSA is unsat [2018-06-25 16:57:06,659 WARN ]: Spent 3.22 s on a formula simplification. DAG size of input: 97 DAG size of output: 21 [2018-06-25 16:57:16,787 WARN ]: Spent 9.99 s on a formula simplification. DAG size of input: 288 DAG size of output: 32 [2018-06-25 16:57:23,762 WARN ]: Spent 6.77 s on a formula simplification. DAG size of input: 501 DAG size of output: 32 [2018-06-25 16:57:30,542 WARN ]: Spent 6.53 s on a formula simplification. DAG size of input: 573 DAG size of output: 38 [2018-06-25 16:57:30,622 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 16:57:30,622 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 16:57:30,622 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 [2018-06-25 16:57:30,646 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-25 16:57:30,999 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-25 16:57:30,999 INFO ]: Conjunction of SSA is unsat [2018-06-25 16:57:31,014 INFO ]: Computing forward predicates... [2018-06-25 16:57:31,399 WARN ]: Spent 117.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 9 [2018-06-25 16:57:31,880 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 16:57:31,912 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 16:57:31,912 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2018-06-25 16:57:31,913 INFO ]: Interpolant automaton has 14 states [2018-06-25 16:57:31,913 INFO ]: Constructing interpolant automaton starting with 14 interpolants. [2018-06-25 16:57:31,913 INFO ]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2018-06-25 16:57:31,913 INFO ]: Start difference. First operand 13 states and 13 transitions. Second operand 14 states. [2018-06-25 16:57:32,279 WARN ]: Spent 300.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 35 [2018-06-25 16:57:33,220 WARN ]: Spent 886.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2018-06-25 16:57:33,831 WARN ]: Spent 537.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2018-06-25 16:57:34,804 WARN ]: Spent 765.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2018-06-25 16:57:35,001 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 16:57:35,001 INFO ]: Finished difference Result 15 states and 15 transitions. [2018-06-25 16:57:35,005 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-25 16:57:35,005 INFO ]: Start accepts. Automaton has 14 states. Word has length 12 [2018-06-25 16:57:35,005 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 16:57:35,006 INFO ]: With dead ends: 15 [2018-06-25 16:57:35,006 INFO ]: Without dead ends: 15 [2018-06-25 16:57:35,006 INFO ]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 30.6s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2018-06-25 16:57:35,006 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-25 16:57:35,008 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-25 16:57:35,008 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-25 16:57:35,008 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-06-25 16:57:35,008 INFO ]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-06-25 16:57:35,009 INFO ]: Finished accepts. word is rejected. [2018-06-25 16:57:35,009 INFO ]: Abstraction has 15 states and 15 transitions. [2018-06-25 16:57:35,009 INFO ]: Interpolant automaton has 14 states. [2018-06-25 16:57:35,011 INFO ]: Start isEmpty. Operand 15 states and 15 transitions. [2018-06-25 16:57:35,011 INFO ]: Finished isEmpty. Found accepting run of length 15 [2018-06-25 16:57:35,011 INFO ]: Found error trace [2018-06-25 16:57:35,011 INFO ]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 16:57:35,011 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 16:57:35,011 INFO ]: Analyzing trace with hash -414382217, now seen corresponding path program 4 times [2018-06-25 16:57:35,012 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 16:57:35,012 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 16:57:35,012 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:57:35,012 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 16:57:35,012 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:57:41,305 INFO ]: Conjunction of SSA is unsat Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown