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/cav12/token_ring.2.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 04:50:22,163 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 04:50:22,165 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 04:50:22,178 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 04:50:22,179 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 04:50:22,180 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 04:50:22,183 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 04:50:22,186 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 04:50:22,187 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 04:50:22,189 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 04:50:22,190 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 04:50:22,190 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 04:50:22,191 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 04:50:22,192 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 04:50:22,196 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 04:50:22,197 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 04:50:22,199 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 04:50:22,209 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 04:50:22,210 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 04:50:22,211 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 04:50:22,212 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 04:50:22,217 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 04:50:22,218 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 04:50:22,218 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 04:50:22,219 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 04:50:22,219 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 04:50:22,221 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 04:50:22,222 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 04:50:22,223 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 04:50:22,223 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 04:50:22,223 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 04:50:22,224 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 04:50:22,224 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 04:50:22,229 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 04:50:22,229 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 04:50:22,230 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 04:50:22,251 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 04:50:22,251 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 04:50:22,251 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 04:50:22,252 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 04:50:22,253 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 04:50:22,253 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 04:50:22,253 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 04:50:22,253 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 04:50:22,253 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 04:50:22,254 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 04:50:22,254 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 04:50:22,254 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 04:50:22,254 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 04:50:22,254 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 04:50:22,255 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 04:50:22,255 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 04:50:22,255 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 04:50:22,257 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 04:50:22,257 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 04:50:22,307 INFO ]: Repository-Root is: /tmp [2018-06-22 04:50:22,322 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 04:50:22,328 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 04:50:22,329 INFO ]: Initializing SmtParser... [2018-06-22 04:50:22,330 INFO ]: SmtParser initialized [2018-06-22 04:50:22,330 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/cav12/token_ring.2.smt2 [2018-06-22 04:50:22,332 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 04:50:22,423 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/token_ring.2.smt2 unknown [2018-06-22 04:50:23,168 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/token_ring.2.smt2 [2018-06-22 04:50:23,173 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 04:50:23,179 INFO ]: Walking toolchain with 4 elements. [2018-06-22 04:50:23,180 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 04:50:23,180 INFO ]: Initializing ChcToBoogie... [2018-06-22 04:50:23,180 INFO ]: ChcToBoogie initialized [2018-06-22 04:50:23,183 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 04:50:23" (1/1) ... [2018-06-22 04:50:23,255 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:50:23 Unit [2018-06-22 04:50:23,255 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 04:50:23,256 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 04:50:23,256 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 04:50:23,256 INFO ]: Boogie Preprocessor initialized [2018-06-22 04:50:23,290 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:50:23" (1/1) ... [2018-06-22 04:50:23,290 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:50:23" (1/1) ... [2018-06-22 04:50:23,308 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:50:23" (1/1) ... [2018-06-22 04:50:23,308 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:50:23" (1/1) ... [2018-06-22 04:50:23,333 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:50:23" (1/1) ... [2018-06-22 04:50:23,335 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:50:23" (1/1) ... [2018-06-22 04:50:23,339 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:50:23" (1/1) ... [2018-06-22 04:50:23,346 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 04:50:23,346 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 04:50:23,347 INFO ]: Initializing RCFGBuilder... [2018-06-22 04:50:23,347 INFO ]: RCFGBuilder initialized [2018-06-22 04:50:23,347 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:50:23" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2018-06-22 04:50:23,368 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 04:50:23,368 INFO ]: Found specification of procedure gotoProc [2018-06-22 04:50:23,368 INFO ]: Found implementation of procedure gotoProc [2018-06-22 04:50:23,368 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 04:50:23,368 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 04:50:23,368 INFO ]: Found implementation of procedure Ultimate.START Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 04:50:23,944 INFO ]: Using library mode [2018-06-22 04:50:23,945 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 04:50:23 BoogieIcfgContainer [2018-06-22 04:50:23,945 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 04:50:23,948 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 04:50:23,948 INFO ]: Initializing TraceAbstraction... [2018-06-22 04:50:23,951 INFO ]: TraceAbstraction initialized [2018-06-22 04:50:23,952 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 04:50:23" (1/3) ... [2018-06-22 04:50:23,953 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@724c8d73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 04:50:23, skipping insertion in model container [2018-06-22 04:50:23,953 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:50:23" (2/3) ... [2018-06-22 04:50:23,953 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@724c8d73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 04:50:23, skipping insertion in model container [2018-06-22 04:50:23,954 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 04:50:23" (3/3) ... [2018-06-22 04:50:23,955 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 04:50:23,965 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 04:50:23,974 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 04:50:24,031 INFO ]: Using default assertion order modulation [2018-06-22 04:50:24,031 INFO ]: Interprodecural is true [2018-06-22 04:50:24,031 INFO ]: Hoare is false [2018-06-22 04:50:24,031 INFO ]: Compute interpolants for FPandBP [2018-06-22 04:50:24,032 INFO ]: Backedges is TWOTRACK [2018-06-22 04:50:24,032 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 04:50:24,032 INFO ]: Difference is false [2018-06-22 04:50:24,032 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 04:50:24,032 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 04:50:24,047 INFO ]: Start isEmpty. Operand 10 states. [2018-06-22 04:50:24,059 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-22 04:50:24,059 INFO ]: Found error trace [2018-06-22 04:50:24,060 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-22 04:50:24,060 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 04:50:24,066 INFO ]: Analyzing trace with hash 1285054476, now seen corresponding path program 1 times [2018-06-22 04:50:24,068 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 04:50:24,068 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 04:50:24,106 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:50:24,106 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 04:50:24,106 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:50:24,213 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:50:24,316 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:50:24,318 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 04:50:24,318 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 04:50:24,320 INFO ]: Interpolant automaton has 3 states [2018-06-22 04:50:24,331 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 04:50:24,331 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 04:50:24,334 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-22 04:50:24,427 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 04:50:24,427 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-22 04:50:24,428 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 04:50:24,429 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-22 04:50:24,429 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 04:50:24,441 INFO ]: With dead ends: 9 [2018-06-22 04:50:24,441 INFO ]: Without dead ends: 9 [2018-06-22 04:50:24,486 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 04:50:24,499 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-22 04:50:24,519 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-22 04:50:24,520 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-22 04:50:24,521 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-22 04:50:24,522 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-22 04:50:24,522 INFO ]: Finished accepts. word is rejected. [2018-06-22 04:50:24,522 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-22 04:50:24,522 INFO ]: Interpolant automaton has 3 states. [2018-06-22 04:50:24,522 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-22 04:50:24,522 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 04:50:24,522 INFO ]: Found error trace [2018-06-22 04:50:24,522 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 04:50:24,523 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 04:50:24,523 INFO ]: Analyzing trace with hash 1180100628, now seen corresponding path program 1 times [2018-06-22 04:50:24,523 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 04:50:24,523 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 04:50:24,524 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:50:24,524 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 04:50:24,524 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:50:24,698 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:50:25,048 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:50:25,048 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 04:50:25,048 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 04:50:25,068 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 04:50:25,248 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:50:25,266 INFO ]: Computing forward predicates... [2018-06-22 04:50:25,838 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:50:25,875 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 04:50:25,875 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-06-22 04:50:25,875 INFO ]: Interpolant automaton has 4 states [2018-06-22 04:50:25,876 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 04:50:25,876 INFO ]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-06-22 04:50:25,876 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 4 states. [2018-06-22 04:50:25,989 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 04:50:25,989 INFO ]: Finished difference Result 10 states and 10 transitions. [2018-06-22 04:50:25,990 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 04:50:25,990 INFO ]: Start accepts. Automaton has 4 states. Word has length 8 [2018-06-22 04:50:25,990 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 04:50:25,990 INFO ]: With dead ends: 10 [2018-06-22 04:50:25,990 INFO ]: Without dead ends: 10 [2018-06-22 04:50:25,991 INFO ]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-06-22 04:50:25,991 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-22 04:50:25,992 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-22 04:50:25,992 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-22 04:50:25,993 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-06-22 04:50:25,993 INFO ]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-06-22 04:50:25,993 INFO ]: Finished accepts. word is rejected. [2018-06-22 04:50:25,993 INFO ]: Abstraction has 10 states and 10 transitions. [2018-06-22 04:50:25,993 INFO ]: Interpolant automaton has 4 states. [2018-06-22 04:50:25,993 INFO ]: Start isEmpty. Operand 10 states and 10 transitions. [2018-06-22 04:50:25,993 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 04:50:25,993 INFO ]: Found error trace [2018-06-22 04:50:25,993 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 04:50:25,993 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 04:50:25,994 INFO ]: Analyzing trace with hash -2073468660, now seen corresponding path program 2 times [2018-06-22 04:50:25,994 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 04:50:25,994 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 04:50:25,996 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:50:25,996 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 04:50:25,996 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:50:26,137 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:50:26,467 WARN ]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-22 04:50:26,557 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:50:26,557 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 04:50:26,557 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 04:50:26,566 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 04:50:26,777 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 04:50:26,777 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:50:26,796 INFO ]: Computing forward predicates... [2018-06-22 04:50:27,844 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:50:27,864 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 04:50:27,864 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-06-22 04:50:27,864 INFO ]: Interpolant automaton has 6 states [2018-06-22 04:50:27,864 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 04:50:27,865 INFO ]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-06-22 04:50:27,865 INFO ]: Start difference. First operand 10 states and 10 transitions. Second operand 6 states. [2018-06-22 04:50:27,941 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 04:50:27,941 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-22 04:50:27,942 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-22 04:50:27,942 INFO ]: Start accepts. Automaton has 6 states. Word has length 9 [2018-06-22 04:50:27,942 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 04:50:27,942 INFO ]: With dead ends: 11 [2018-06-22 04:50:27,942 INFO ]: Without dead ends: 11 [2018-06-22 04:50:27,942 INFO ]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2018-06-22 04:50:27,942 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-22 04:50:27,943 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-22 04:50:27,943 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-22 04:50:27,943 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-22 04:50:27,943 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-06-22 04:50:27,943 INFO ]: Finished accepts. word is rejected. [2018-06-22 04:50:27,943 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-22 04:50:27,943 INFO ]: Interpolant automaton has 6 states. [2018-06-22 04:50:27,944 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-22 04:50:27,944 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-22 04:50:27,944 INFO ]: Found error trace [2018-06-22 04:50:27,944 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 04:50:27,944 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 04:50:27,944 INFO ]: Analyzing trace with hash 145098516, now seen corresponding path program 3 times [2018-06-22 04:50:27,944 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 04:50:27,944 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 04:50:27,945 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:50:27,945 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 04:50:27,945 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:50:28,062 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:50:28,401 WARN ]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-22 04:50:28,419 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:50:28,419 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 04:50:28,419 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 04:50:28,425 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 04:50:28,688 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-22 04:50:28,688 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:50:28,706 INFO ]: Computing forward predicates... [2018-06-22 04:50:31,339 WARN ]: Spent 134.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2018-06-22 04:50:31,342 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:50:31,368 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 04:50:31,369 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-06-22 04:50:31,369 INFO ]: Interpolant automaton has 8 states [2018-06-22 04:50:31,369 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 04:50:31,369 INFO ]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-06-22 04:50:31,369 INFO ]: Start difference. First operand 11 states and 11 transitions. Second operand 8 states. [2018-06-22 04:50:31,499 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 04:50:31,500 INFO ]: Finished difference Result 12 states and 12 transitions. [2018-06-22 04:50:31,500 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 04:50:31,500 INFO ]: Start accepts. Automaton has 8 states. Word has length 10 [2018-06-22 04:50:31,500 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 04:50:31,500 INFO ]: With dead ends: 12 [2018-06-22 04:50:31,500 INFO ]: Without dead ends: 12 [2018-06-22 04:50:31,500 INFO ]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2018-06-22 04:50:31,500 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-22 04:50:31,502 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-06-22 04:50:31,502 INFO ]: Start removeUnreachable. Operand 12 states. [2018-06-22 04:50:31,502 INFO ]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-06-22 04:50:31,502 INFO ]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-06-22 04:50:31,502 INFO ]: Finished accepts. word is rejected. [2018-06-22 04:50:31,502 INFO ]: Abstraction has 12 states and 12 transitions. [2018-06-22 04:50:31,502 INFO ]: Interpolant automaton has 8 states. [2018-06-22 04:50:31,502 INFO ]: Start isEmpty. Operand 12 states and 12 transitions. [2018-06-22 04:50:31,503 INFO ]: Finished isEmpty. Found accepting run of length 12 [2018-06-22 04:50:31,503 INFO ]: Found error trace [2018-06-22 04:50:31,503 INFO ]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 04:50:31,503 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 04:50:31,503 INFO ]: Analyzing trace with hash 201204236, now seen corresponding path program 4 times [2018-06-22 04:50:31,503 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 04:50:31,503 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 04:50:31,503 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:50:31,504 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 04:50:31,504 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:50:31,657 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:50:32,033 WARN ]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-22 04:50:32,136 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:50:32,136 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 04:50:32,136 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 04:50:32,144 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown