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_4_e1_917.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-14921ce [2018-06-25 16:48:33,057 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-25 16:48:33,059 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-25 16:48:33,069 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-25 16:48:33,070 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-25 16:48:33,071 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-25 16:48:33,074 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-25 16:48:33,076 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-25 16:48:33,078 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-25 16:48:33,078 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-25 16:48:33,080 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-25 16:48:33,081 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-25 16:48:33,081 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-25 16:48:33,082 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-25 16:48:33,085 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-25 16:48:33,086 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-25 16:48:33,087 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-25 16:48:33,098 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-25 16:48:33,100 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-25 16:48:33,101 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-25 16:48:33,102 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-25 16:48:33,104 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-25 16:48:33,104 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-25 16:48:33,105 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-25 16:48:33,105 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-25 16:48:33,111 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-25 16:48:33,112 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-25 16:48:33,113 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-25 16:48:33,114 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-25 16:48:33,114 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-25 16:48:33,115 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-25 16:48:33,115 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-25 16:48:33,115 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-25 16:48:33,121 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-25 16:48:33,122 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-25 16:48:33,122 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-25 16:48:33,142 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-25 16:48:33,142 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-25 16:48:33,142 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-25 16:48:33,146 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-25 16:48:33,147 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-25 16:48:33,147 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-25 16:48:33,148 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-25 16:48:33,148 INFO L133 SettingsManager]: * Use SBE=true [2018-06-25 16:48:33,148 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-25 16:48:33,148 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-25 16:48:33,148 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-25 16:48:33,149 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-25 16:48:33,149 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-25 16:48:33,149 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-25 16:48:33,149 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-25 16:48:33,149 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-25 16:48:33,150 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-25 16:48:33,151 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-25 16:48:33,151 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-25 16:48:33,151 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-25 16:48:33,151 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-25 16:48:33,152 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-25 16:48:33,153 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-25 16:48:33,200 INFO ]: Repository-Root is: /tmp [2018-06-25 16:48:33,211 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-25 16:48:33,214 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-25 16:48:33,216 INFO ]: Initializing SmtParser... [2018-06-25 16:48:33,216 INFO ]: SmtParser initialized [2018-06-25 16:48:33,216 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_4_e1_917.smt2 [2018-06-25 16:48:33,218 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 16:48:33,305 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_4_e1_917.smt2 unknown [2018-06-25 16:48:33,775 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_4_e1_917.smt2 [2018-06-25 16:48:33,788 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-25 16:48:33,795 INFO ]: Walking toolchain with 4 elements. [2018-06-25 16:48:33,795 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-25 16:48:33,795 INFO ]: Initializing ChcToBoogie... [2018-06-25 16:48:33,795 INFO ]: ChcToBoogie initialized [2018-06-25 16:48:33,805 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 04:48:33" (1/1) ... [2018-06-25 16:48:33,882 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:48:33 Unit [2018-06-25 16:48:33,882 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-25 16:48:33,883 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-25 16:48:33,883 INFO ]: Initializing Boogie Preprocessor... [2018-06-25 16:48:33,883 INFO ]: Boogie Preprocessor initialized [2018-06-25 16:48:33,907 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:48:33" (1/1) ... [2018-06-25 16:48:33,908 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:48:33" (1/1) ... [2018-06-25 16:48:33,927 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:48:33" (1/1) ... [2018-06-25 16:48:33,927 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:48:33" (1/1) ... [2018-06-25 16:48:33,941 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:48:33" (1/1) ... [2018-06-25 16:48:33,942 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:48:33" (1/1) ... [2018-06-25 16:48:33,944 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:48:33" (1/1) ... [2018-06-25 16:48:33,947 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-25 16:48:33,956 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-25 16:48:33,956 INFO ]: Initializing RCFGBuilder... [2018-06-25 16:48:33,956 INFO ]: RCFGBuilder initialized [2018-06-25 16:48:33,957 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:48:33" (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) [2018-06-25 16:48:33,980 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-25 16:48:33,980 INFO ]: Found specification of procedure gotoProc [2018-06-25 16:48:33,980 INFO ]: Found implementation of procedure gotoProc [2018-06-25 16:48:33,980 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-25 16:48:33,980 INFO ]: Found specification of procedure Ultimate.START [2018-06-25 16:48:33,980 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 [2018-06-25 16:48:34,413 INFO ]: Using library mode [2018-06-25 16:48:34,414 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 04:48:34 BoogieIcfgContainer [2018-06-25 16:48:34,414 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-25 16:48:34,416 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-25 16:48:34,416 INFO ]: Initializing TraceAbstraction... [2018-06-25 16:48:34,419 INFO ]: TraceAbstraction initialized [2018-06-25 16:48:34,419 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 04:48:33" (1/3) ... [2018-06-25 16:48:34,420 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f790309 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 25.06 04:48:34, skipping insertion in model container [2018-06-25 16:48:34,420 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:48:33" (2/3) ... [2018-06-25 16:48:34,420 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f790309 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.06 04:48:34, skipping insertion in model container [2018-06-25 16:48:34,421 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 04:48:34" (3/3) ... [2018-06-25 16:48:34,422 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-25 16:48:34,431 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-25 16:48:34,440 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-25 16:48:34,494 INFO ]: Using default assertion order modulation [2018-06-25 16:48:34,495 INFO ]: Interprodecural is true [2018-06-25 16:48:34,495 INFO ]: Hoare is false [2018-06-25 16:48:34,495 INFO ]: Compute interpolants for FPandBP [2018-06-25 16:48:34,495 INFO ]: Backedges is TWOTRACK [2018-06-25 16:48:34,495 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-25 16:48:34,495 INFO ]: Difference is false [2018-06-25 16:48:34,495 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-25 16:48:34,495 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-25 16:48:34,509 INFO ]: Start isEmpty. Operand 10 states. [2018-06-25 16:48:34,524 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-25 16:48:34,524 INFO ]: Found error trace [2018-06-25 16:48:34,526 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-25 16:48:34,527 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 16:48:34,531 INFO ]: Analyzing trace with hash 1284994894, now seen corresponding path program 1 times [2018-06-25 16:48:34,534 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 16:48:34,534 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 16:48:34,581 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:48:34,581 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 16:48:34,581 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:48:34,682 INFO ]: Conjunction of SSA is unsat [2018-06-25 16:48:34,812 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 16:48:34,814 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-25 16:48:34,814 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-25 16:48:34,816 INFO ]: Interpolant automaton has 3 states [2018-06-25 16:48:34,831 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-25 16:48:34,831 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 16:48:34,833 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-25 16:48:34,912 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 16:48:34,912 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-25 16:48:34,913 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-25 16:48:34,914 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-25 16:48:34,914 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 16:48:34,925 INFO ]: With dead ends: 9 [2018-06-25 16:48:34,925 INFO ]: Without dead ends: 9 [2018-06-25 16:48:34,927 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 16:48:34,943 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-25 16:48:34,971 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-25 16:48:34,972 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-25 16:48:34,973 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-25 16:48:34,974 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-25 16:48:34,974 INFO ]: Finished accepts. word is rejected. [2018-06-25 16:48:34,974 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-25 16:48:34,974 INFO ]: Interpolant automaton has 3 states. [2018-06-25 16:48:34,974 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-25 16:48:34,974 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-25 16:48:34,974 INFO ]: Found error trace [2018-06-25 16:48:34,974 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 16:48:34,974 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 16:48:34,975 INFO ]: Analyzing trace with hash 1180964567, now seen corresponding path program 1 times [2018-06-25 16:48:34,975 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 16:48:34,975 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 16:48:34,976 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:48:34,976 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 16:48:34,976 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:48:35,090 INFO ]: Conjunction of SSA is unsat [2018-06-25 16:48:35,216 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 16:48:35,216 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 16:48:35,216 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 [2018-06-25 16:48:35,222 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 16:48:35,374 INFO ]: Conjunction of SSA is unsat [2018-06-25 16:48:35,385 INFO ]: Computing forward predicates... [2018-06-25 16:48:35,584 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 16:48:35,616 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 16:48:35,616 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-06-25 16:48:35,617 INFO ]: Interpolant automaton has 6 states [2018-06-25 16:48:35,617 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-25 16:48:35,617 INFO ]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-06-25 16:48:35,617 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 6 states. [2018-06-25 16:48:35,763 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 16:48:35,763 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-25 16:48:35,763 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-25 16:48:35,763 INFO ]: Start accepts. Automaton has 6 states. Word has length 8 [2018-06-25 16:48:35,763 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 16:48:35,763 INFO ]: With dead ends: 11 [2018-06-25 16:48:35,763 INFO ]: Without dead ends: 11 [2018-06-25 16:48:35,764 INFO ]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-06-25 16:48:35,764 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-25 16:48:35,765 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-25 16:48:35,765 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-25 16:48:35,765 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-25 16:48:35,766 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-06-25 16:48:35,766 INFO ]: Finished accepts. word is rejected. [2018-06-25 16:48:35,766 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-25 16:48:35,766 INFO ]: Interpolant automaton has 6 states. [2018-06-25 16:48:35,766 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-25 16:48:35,766 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-25 16:48:35,766 INFO ]: Found error trace [2018-06-25 16:48:35,766 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 16:48:35,766 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 16:48:35,766 INFO ]: Analyzing trace with hash 1062095287, now seen corresponding path program 2 times [2018-06-25 16:48:35,766 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 16:48:35,766 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 16:48:35,767 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:48:35,767 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 16:48:35,767 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:48:35,937 INFO ]: Conjunction of SSA is unsat [2018-06-25 16:48:36,387 WARN ]: Spent 136.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 12 [2018-06-25 16:48:36,475 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 16:48:36,475 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 16:48:36,475 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 16:48:36,482 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-25 16:48:36,672 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-25 16:48:36,672 INFO ]: Conjunction of SSA is unsat [2018-06-25 16:48:36,680 INFO ]: Computing forward predicates... [2018-06-25 16:48:37,224 WARN ]: Spent 114.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 5 [2018-06-25 16:48:37,442 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 16:48:37,462 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 16:48:37,462 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2018-06-25 16:48:37,462 INFO ]: Interpolant automaton has 10 states [2018-06-25 16:48:37,462 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-25 16:48:37,463 INFO ]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-06-25 16:48:37,463 INFO ]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-06-25 16:48:37,748 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 16:48:37,748 INFO ]: Finished difference Result 13 states and 13 transitions. [2018-06-25 16:48:37,748 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-25 16:48:37,748 INFO ]: Start accepts. Automaton has 10 states. Word has length 10 [2018-06-25 16:48:37,748 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 16:48:37,748 INFO ]: With dead ends: 13 [2018-06-25 16:48:37,748 INFO ]: Without dead ends: 13 [2018-06-25 16:48:37,749 INFO ]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2018-06-25 16:48:37,749 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-25 16:48:37,750 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-25 16:48:37,750 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-25 16:48:37,751 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-06-25 16:48:37,751 INFO ]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-06-25 16:48:37,751 INFO ]: Finished accepts. word is rejected. [2018-06-25 16:48:37,751 INFO ]: Abstraction has 13 states and 13 transitions. [2018-06-25 16:48:37,751 INFO ]: Interpolant automaton has 10 states. [2018-06-25 16:48:37,751 INFO ]: Start isEmpty. Operand 13 states and 13 transitions. [2018-06-25 16:48:37,751 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-25 16:48:37,751 INFO ]: Found error trace [2018-06-25 16:48:37,751 INFO ]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 16:48:37,751 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 16:48:37,752 INFO ]: Analyzing trace with hash -1502133097, now seen corresponding path program 3 times [2018-06-25 16:48:37,752 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 16:48:37,752 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 16:48:37,752 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:48:37,753 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 16:48:37,753 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:48:38,041 INFO ]: Conjunction of SSA is unsat [2018-06-25 16:48:39,160 WARN ]: Spent 422.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 12 [2018-06-25 16:48:40,197 WARN ]: Spent 996.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 12 [2018-06-25 16:48:41,046 WARN ]: Spent 727.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 12 [2018-06-25 16:48:41,659 WARN ]: Spent 576.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 29 [2018-06-25 16:48:41,668 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 16:48:41,668 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 16:48:41,668 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 16:48:41,676 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-25 16:48:41,924 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-25 16:48:41,924 INFO ]: Conjunction of SSA is unsat [2018-06-25 16:48:41,932 INFO ]: Computing forward predicates... [2018-06-25 16:48:42,144 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 16:48:42,179 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 16:48:42,179 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2018-06-25 16:48:42,179 INFO ]: Interpolant automaton has 14 states [2018-06-25 16:48:42,180 INFO ]: Constructing interpolant automaton starting with 14 interpolants. [2018-06-25 16:48:42,180 INFO ]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2018-06-25 16:48:42,180 INFO ]: Start difference. First operand 13 states and 13 transitions. Second operand 14 states. [2018-06-25 16:48:42,327 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 16:48:42,327 INFO ]: Finished difference Result 15 states and 15 transitions. [2018-06-25 16:48:42,328 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-25 16:48:42,328 INFO ]: Start accepts. Automaton has 14 states. Word has length 12 [2018-06-25 16:48:42,328 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 16:48:42,328 INFO ]: With dead ends: 15 [2018-06-25 16:48:42,328 INFO ]: Without dead ends: 15 [2018-06-25 16:48:42,329 INFO ]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2018-06-25 16:48:42,329 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-25 16:48:42,330 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-25 16:48:42,330 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-25 16:48:42,331 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-06-25 16:48:42,331 INFO ]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-06-25 16:48:42,331 INFO ]: Finished accepts. word is rejected. [2018-06-25 16:48:42,331 INFO ]: Abstraction has 15 states and 15 transitions. [2018-06-25 16:48:42,331 INFO ]: Interpolant automaton has 14 states. [2018-06-25 16:48:42,331 INFO ]: Start isEmpty. Operand 15 states and 15 transitions. [2018-06-25 16:48:42,331 INFO ]: Finished isEmpty. Found accepting run of length 15 [2018-06-25 16:48:42,331 INFO ]: Found error trace [2018-06-25 16:48:42,331 INFO ]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 16:48:42,331 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 16:48:42,331 INFO ]: Analyzing trace with hash -414382217, now seen corresponding path program 4 times [2018-06-25 16:48:42,331 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 16:48:42,331 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 16:48:42,333 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:48:42,333 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 16:48:42,333 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:48:43,479 INFO ]: Conjunction of SSA is unsat Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown