java -Xss1g -Xmx4000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCHC.xml --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_No_Goto.epf -i /storage/chc-comp/llreve-bench/smt2/rec__ackermann.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 12:15:52,231 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 12:15:52,233 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 12:15:52,244 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 12:15:52,245 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 12:15:52,246 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 12:15:52,247 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 12:15:52,249 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 12:15:52,250 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 12:15:52,251 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 12:15:52,252 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 12:15:52,252 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 12:15:52,253 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 12:15:52,254 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 12:15:52,255 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 12:15:52,255 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 12:15:52,261 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 12:15:52,263 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 12:15:52,273 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 12:15:52,274 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 12:15:52,275 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 12:15:52,278 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 12:15:52,278 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 12:15:52,278 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 12:15:52,279 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 12:15:52,280 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 12:15:52,281 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 12:15:52,281 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 12:15:52,289 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 12:15:52,289 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 12:15:52,290 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 12:15:52,291 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 12:15:52,291 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 12:15:52,291 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 12:15:52,292 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 12:15:52,292 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_No_Goto.epf [2018-06-22 12:15:52,316 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 12:15:52,317 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 12:15:52,317 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 12:15:52,317 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 12:15:52,321 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 12:15:52,321 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 12:15:52,321 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 12:15:52,322 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 12:15:52,322 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 12:15:52,322 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 12:15:52,322 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 12:15:52,322 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 12:15:52,322 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 12:15:52,323 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 12:15:52,323 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 12:15:52,323 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 12:15:52,323 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 12:15:52,323 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 12:15:52,323 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 12:15:52,326 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 12:15:52,326 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 12:15:52,366 INFO ]: Repository-Root is: /tmp [2018-06-22 12:15:52,380 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 12:15:52,384 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 12:15:52,385 INFO ]: Initializing SmtParser... [2018-06-22 12:15:52,386 INFO ]: SmtParser initialized [2018-06-22 12:15:52,386 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/llreve-bench/smt2/rec__ackermann.smt2 [2018-06-22 12:15:52,388 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 12:15:52,476 INFO ]: Executing SMT file /storage/chc-comp/llreve-bench/smt2/rec__ackermann.smt2 unknown de.uni_freiburg.informatik.ultimate.plugins.generator.treeautomizer.parsing.HornClauseParserScript$1@2917fa9c [2018-06-22 12:15:52,890 INFO ]: Succesfully executed SMT file /storage/chc-comp/llreve-bench/smt2/rec__ackermann.smt2 [2018-06-22 12:15:52,897 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 12:15:52,903 INFO ]: Walking toolchain with 4 elements. [2018-06-22 12:15:52,903 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 12:15:52,903 INFO ]: Initializing ChcToBoogie... [2018-06-22 12:15:52,903 INFO ]: ChcToBoogie initialized [2018-06-22 12:15:52,906 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 12:15:52" (1/1) ... [2018-06-22 12:15:52,954 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:15:52 Unit [2018-06-22 12:15:52,954 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 12:15:52,955 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 12:15:52,955 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 12:15:52,955 INFO ]: Boogie Preprocessor initialized [2018-06-22 12:15:52,977 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:15:52" (1/1) ... [2018-06-22 12:15:52,977 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:15:52" (1/1) ... [2018-06-22 12:15:52,996 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:15:52" (1/1) ... [2018-06-22 12:15:52,996 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:15:52" (1/1) ... [2018-06-22 12:15:53,005 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:15:52" (1/1) ... [2018-06-22 12:15:53,009 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:15:52" (1/1) ... [2018-06-22 12:15:53,011 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:15:52" (1/1) ... [2018-06-22 12:15:53,013 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 12:15:53,014 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 12:15:53,014 INFO ]: Initializing RCFGBuilder... [2018-06-22 12:15:53,014 INFO ]: RCFGBuilder initialized [2018-06-22 12:15:53,015 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:15:52" (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 12:15:53,027 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 12:15:53,027 INFO ]: Found specification of procedure False [2018-06-22 12:15:53,027 INFO ]: Found implementation of procedure False [2018-06-22 12:15:53,027 INFO ]: Specification and implementation of procedure INV_REC_f^f given in one single declaration [2018-06-22 12:15:53,027 INFO ]: Found specification of procedure INV_REC_f^f [2018-06-22 12:15:53,027 INFO ]: Found implementation of procedure INV_REC_f^f [2018-06-22 12:15:53,027 INFO ]: Specification and implementation of procedure INV_REC_f^f_PRE given in one single declaration [2018-06-22 12:15:53,027 INFO ]: Found specification of procedure INV_REC_f^f_PRE [2018-06-22 12:15:53,027 INFO ]: Found implementation of procedure INV_REC_f^f_PRE [2018-06-22 12:15:53,027 INFO ]: Specification and implementation of procedure INV_REC_f__2 given in one single declaration [2018-06-22 12:15:53,027 INFO ]: Found specification of procedure INV_REC_f__2 [2018-06-22 12:15:53,027 INFO ]: Found implementation of procedure INV_REC_f__2 [2018-06-22 12:15:53,027 INFO ]: Specification and implementation of procedure INV_REC_f__2_PRE given in one single declaration [2018-06-22 12:15:53,027 INFO ]: Found specification of procedure INV_REC_f__2_PRE [2018-06-22 12:15:53,027 INFO ]: Found implementation of procedure INV_REC_f__2_PRE [2018-06-22 12:15:53,027 INFO ]: Specification and implementation of procedure INV_REC_f__1 given in one single declaration [2018-06-22 12:15:53,027 INFO ]: Found specification of procedure INV_REC_f__1 [2018-06-22 12:15:53,027 INFO ]: Found implementation of procedure INV_REC_f__1 [2018-06-22 12:15:53,027 INFO ]: Specification and implementation of procedure INV_REC_f__1_PRE given in one single declaration [2018-06-22 12:15:53,027 INFO ]: Found specification of procedure INV_REC_f__1_PRE [2018-06-22 12:15:53,027 INFO ]: Found implementation of procedure INV_REC_f__1_PRE [2018-06-22 12:15:53,027 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 12:15:53,027 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 12:15:53,028 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 12:15:54,196 INFO ]: Using library mode [2018-06-22 12:15:54,197 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 12:15:54 BoogieIcfgContainer [2018-06-22 12:15:54,197 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 12:15:54,198 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 12:15:54,198 INFO ]: Initializing TraceAbstraction... [2018-06-22 12:15:54,201 INFO ]: TraceAbstraction initialized [2018-06-22 12:15:54,202 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 12:15:52" (1/3) ... [2018-06-22 12:15:54,203 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35df4449 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 12:15:54, skipping insertion in model container [2018-06-22 12:15:54,203 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:15:52" (2/3) ... [2018-06-22 12:15:54,203 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35df4449 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 12:15:54, skipping insertion in model container [2018-06-22 12:15:54,203 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 12:15:54" (3/3) ... [2018-06-22 12:15:54,205 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 12:15:54,214 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 12:15:54,222 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 12:15:54,265 INFO ]: Using default assertion order modulation [2018-06-22 12:15:54,266 INFO ]: Interprodecural is true [2018-06-22 12:15:54,266 INFO ]: Hoare is false [2018-06-22 12:15:54,266 INFO ]: Compute interpolants for FPandBP [2018-06-22 12:15:54,266 INFO ]: Backedges is TWOTRACK [2018-06-22 12:15:54,266 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 12:15:54,266 INFO ]: Difference is false [2018-06-22 12:15:54,266 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 12:15:54,266 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 12:15:54,284 INFO ]: Start isEmpty. Operand 104 states. [2018-06-22 12:15:54,308 INFO ]: Finished isEmpty. Found accepting run of length 6 [2018-06-22 12:15:54,308 INFO ]: Found error trace [2018-06-22 12:15:54,309 INFO ]: trace histogram [1, 1, 1, 1, 1] [2018-06-22 12:15:54,309 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:15:54,314 INFO ]: Analyzing trace with hash 367414172, now seen corresponding path program 1 times [2018-06-22 12:15:54,316 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:15:54,316 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:15:54,363 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:15:54,363 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:15:54,363 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:15:54,382 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:15:54,406 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 12:15:54,408 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 12:15:54,409 INFO ]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-06-22 12:15:54,410 INFO ]: Interpolant automaton has 2 states [2018-06-22 12:15:54,426 INFO ]: Constructing interpolant automaton starting with 2 interpolants. [2018-06-22 12:15:54,427 INFO ]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-06-22 12:15:54,429 INFO ]: Start difference. First operand 104 states. Second operand 2 states. [2018-06-22 12:15:54,474 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 12:15:54,474 INFO ]: Finished difference Result 88 states and 177 transitions. [2018-06-22 12:15:54,474 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-06-22 12:15:54,476 INFO ]: Start accepts. Automaton has 2 states. Word has length 5 [2018-06-22 12:15:54,476 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 12:15:54,501 INFO ]: With dead ends: 88 [2018-06-22 12:15:54,501 INFO ]: Without dead ends: 88 [2018-06-22 12:15:54,504 INFO ]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-06-22 12:15:54,521 INFO ]: Start minimizeSevpa. Operand 88 states. [2018-06-22 12:15:54,587 INFO ]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-06-22 12:15:54,588 INFO ]: Start removeUnreachable. Operand 88 states. [2018-06-22 12:15:54,594 INFO ]: Finished removeUnreachable. Reduced from 88 states to 88 states and 177 transitions. [2018-06-22 12:15:54,595 INFO ]: Start accepts. Automaton has 88 states and 177 transitions. Word has length 5 [2018-06-22 12:15:54,596 INFO ]: Finished accepts. word is rejected. [2018-06-22 12:15:54,596 INFO ]: Abstraction has 88 states and 177 transitions. [2018-06-22 12:15:54,596 INFO ]: Interpolant automaton has 2 states. [2018-06-22 12:15:54,596 INFO ]: Start isEmpty. Operand 88 states and 177 transitions. [2018-06-22 12:15:54,603 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 12:15:54,603 INFO ]: Found error trace [2018-06-22 12:15:54,603 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 12:15:54,603 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:15:54,603 INFO ]: Analyzing trace with hash 1626482263, now seen corresponding path program 1 times [2018-06-22 12:15:54,604 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:15:54,604 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:15:54,604 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:15:54,604 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:15:54,604 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:15:54,642 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:15:54,755 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 12:15:54,755 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 12:15:54,755 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 12:15:54,756 INFO ]: Interpolant automaton has 4 states [2018-06-22 12:15:54,757 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 12:15:54,757 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 12:15:54,757 INFO ]: Start difference. First operand 88 states and 177 transitions. Second operand 4 states. [2018-06-22 12:15:55,101 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 12:15:55,101 INFO ]: Finished difference Result 93 states and 191 transitions. [2018-06-22 12:15:55,101 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 12:15:55,102 INFO ]: Start accepts. Automaton has 4 states. Word has length 13 [2018-06-22 12:15:55,102 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 12:15:55,107 INFO ]: With dead ends: 93 [2018-06-22 12:15:55,107 INFO ]: Without dead ends: 93 [2018-06-22 12:15:55,108 INFO ]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 12:15:55,108 INFO ]: Start minimizeSevpa. Operand 93 states. [2018-06-22 12:15:55,128 INFO ]: Finished minimizeSevpa. Reduced states from 93 to 91. [2018-06-22 12:15:55,128 INFO ]: Start removeUnreachable. Operand 91 states. [2018-06-22 12:15:55,132 INFO ]: Finished removeUnreachable. Reduced from 91 states to 91 states and 189 transitions. [2018-06-22 12:15:55,135 INFO ]: Start accepts. Automaton has 91 states and 189 transitions. Word has length 13 [2018-06-22 12:15:55,136 INFO ]: Finished accepts. word is rejected. [2018-06-22 12:15:55,136 INFO ]: Abstraction has 91 states and 189 transitions. [2018-06-22 12:15:55,136 INFO ]: Interpolant automaton has 4 states. [2018-06-22 12:15:55,136 INFO ]: Start isEmpty. Operand 91 states and 189 transitions. [2018-06-22 12:15:55,147 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 12:15:55,147 INFO ]: Found error trace [2018-06-22 12:15:55,148 INFO ]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 12:15:55,148 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:15:55,148 INFO ]: Analyzing trace with hash 1970346122, now seen corresponding path program 1 times [2018-06-22 12:15:55,148 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:15:55,148 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:15:55,149 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:15:55,149 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:15:55,149 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:15:55,179 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:15:55,219 INFO ]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-06-22 12:15:55,220 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 12:15:55,220 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 12:15:55,220 INFO ]: Interpolant automaton has 4 states [2018-06-22 12:15:55,220 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 12:15:55,220 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 12:15:55,220 INFO ]: Start difference. First operand 91 states and 189 transitions. Second operand 4 states. [2018-06-22 12:15:55,499 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 12:15:55,499 INFO ]: Finished difference Result 95 states and 208 transitions. [2018-06-22 12:15:55,500 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 12:15:55,500 INFO ]: Start accepts. Automaton has 4 states. Word has length 21 [2018-06-22 12:15:55,500 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 12:15:55,503 INFO ]: With dead ends: 95 [2018-06-22 12:15:55,503 INFO ]: Without dead ends: 95 [2018-06-22 12:15:55,503 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 12:15:55,503 INFO ]: Start minimizeSevpa. Operand 95 states. [2018-06-22 12:15:55,520 INFO ]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-06-22 12:15:55,520 INFO ]: Start removeUnreachable. Operand 95 states. [2018-06-22 12:15:55,523 INFO ]: Finished removeUnreachable. Reduced from 95 states to 95 states and 208 transitions. [2018-06-22 12:15:55,523 INFO ]: Start accepts. Automaton has 95 states and 208 transitions. Word has length 21 [2018-06-22 12:15:55,523 INFO ]: Finished accepts. word is rejected. [2018-06-22 12:15:55,524 INFO ]: Abstraction has 95 states and 208 transitions. [2018-06-22 12:15:55,524 INFO ]: Interpolant automaton has 4 states. [2018-06-22 12:15:55,524 INFO ]: Start isEmpty. Operand 95 states and 208 transitions. [2018-06-22 12:15:55,528 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 12:15:55,528 INFO ]: Found error trace [2018-06-22 12:15:55,528 INFO ]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 12:15:55,528 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:15:55,529 INFO ]: Analyzing trace with hash 954135196, now seen corresponding path program 1 times [2018-06-22 12:15:55,529 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:15:55,529 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:15:55,530 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:15:55,531 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:15:55,531 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:15:55,555 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:15:55,876 INFO ]: Checked inductivity of 19 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-06-22 12:15:55,876 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 12:15:55,876 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 12:15:55,892 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:15:55,948 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:15:55,959 INFO ]: Computing forward predicates... [2018-06-22 12:15:56,564 INFO ]: Checked inductivity of 19 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-06-22 12:15:56,595 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 12:15:56,595 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2018-06-22 12:15:56,595 INFO ]: Interpolant automaton has 12 states [2018-06-22 12:15:56,596 INFO ]: Constructing interpolant automaton starting with 12 interpolants. [2018-06-22 12:15:56,596 INFO ]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2018-06-22 12:15:56,596 INFO ]: Start difference. First operand 95 states and 208 transitions. Second operand 12 states. [2018-06-22 12:16:00,970 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 12:16:00,971 INFO ]: Finished difference Result 259 states and 1143 transitions. [2018-06-22 12:16:00,971 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-06-22 12:16:00,971 INFO ]: Start accepts. Automaton has 12 states. Word has length 29 [2018-06-22 12:16:00,971 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 12:16:00,989 INFO ]: With dead ends: 259 [2018-06-22 12:16:00,989 INFO ]: Without dead ends: 259 [2018-06-22 12:16:00,991 INFO ]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2018-06-22 12:16:00,991 INFO ]: Start minimizeSevpa. Operand 259 states. [2018-06-22 12:16:01,124 INFO ]: Finished minimizeSevpa. Reduced states from 259 to 222. [2018-06-22 12:16:01,124 INFO ]: Start removeUnreachable. Operand 222 states. [2018-06-22 12:16:01,133 INFO ]: Finished removeUnreachable. Reduced from 222 states to 222 states and 891 transitions. [2018-06-22 12:16:01,134 INFO ]: Start accepts. Automaton has 222 states and 891 transitions. Word has length 29 [2018-06-22 12:16:01,134 INFO ]: Finished accepts. word is rejected. [2018-06-22 12:16:01,134 INFO ]: Abstraction has 222 states and 891 transitions. [2018-06-22 12:16:01,134 INFO ]: Interpolant automaton has 12 states. [2018-06-22 12:16:01,134 INFO ]: Start isEmpty. Operand 222 states and 891 transitions. [2018-06-22 12:16:01,143 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 12:16:01,144 INFO ]: Found error trace [2018-06-22 12:16:01,144 INFO ]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 12:16:01,144 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:16:01,145 INFO ]: Analyzing trace with hash 686108184, now seen corresponding path program 1 times [2018-06-22 12:16:01,145 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:16:01,145 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:16:01,146 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:16:01,146 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:16:01,146 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:16:01,171 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:16:01,207 INFO ]: Checked inductivity of 19 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-06-22 12:16:01,207 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 12:16:01,207 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 12:16:01,207 INFO ]: Interpolant automaton has 4 states [2018-06-22 12:16:01,207 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 12:16:01,207 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 12:16:01,207 INFO ]: Start difference. First operand 222 states and 891 transitions. Second operand 4 states. [2018-06-22 12:16:01,459 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 12:16:01,460 INFO ]: Finished difference Result 232 states and 985 transitions. [2018-06-22 12:16:01,545 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 12:16:01,545 INFO ]: Start accepts. Automaton has 4 states. Word has length 29 [2018-06-22 12:16:01,545 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 12:16:01,558 INFO ]: With dead ends: 232 [2018-06-22 12:16:01,558 INFO ]: Without dead ends: 232 [2018-06-22 12:16:01,558 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 12:16:01,558 INFO ]: Start minimizeSevpa. Operand 232 states. [2018-06-22 12:16:01,645 INFO ]: Finished minimizeSevpa. Reduced states from 232 to 231. [2018-06-22 12:16:01,645 INFO ]: Start removeUnreachable. Operand 231 states. [2018-06-22 12:16:01,652 INFO ]: Finished removeUnreachable. Reduced from 231 states to 231 states and 983 transitions. [2018-06-22 12:16:01,653 INFO ]: Start accepts. Automaton has 231 states and 983 transitions. Word has length 29 [2018-06-22 12:16:01,653 INFO ]: Finished accepts. word is rejected. [2018-06-22 12:16:01,653 INFO ]: Abstraction has 231 states and 983 transitions. [2018-06-22 12:16:01,653 INFO ]: Interpolant automaton has 4 states. [2018-06-22 12:16:01,653 INFO ]: Start isEmpty. Operand 231 states and 983 transitions. [2018-06-22 12:16:01,661 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 12:16:01,661 INFO ]: Found error trace [2018-06-22 12:16:01,661 INFO ]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 12:16:01,661 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:16:01,662 INFO ]: Analyzing trace with hash -932585068, now seen corresponding path program 2 times [2018-06-22 12:16:01,662 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:16:01,662 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:16:01,663 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:16:01,663 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:16:01,663 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:16:01,680 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:16:01,770 INFO ]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 12:16:01,770 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 12:16:01,770 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 12:16:01,783 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 12:16:01,823 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 12:16:01,823 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:16:01,826 INFO ]: Computing forward predicates... [2018-06-22 12:16:01,864 INFO ]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 12:16:01,887 INFO ]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-06-22 12:16:01,887 INFO ]: Number of different interpolants: perfect sequences [6] imperfect sequences [4] total 8 [2018-06-22 12:16:01,887 INFO ]: Interpolant automaton has 8 states [2018-06-22 12:16:01,887 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 12:16:01,887 INFO ]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-06-22 12:16:01,887 INFO ]: Start difference. First operand 231 states and 983 transitions. Second operand 8 states. [2018-06-22 12:16:02,665 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 12:16:02,665 INFO ]: Finished difference Result 357 states and 2185 transitions. [2018-06-22 12:16:02,666 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-22 12:16:02,666 INFO ]: Start accepts. Automaton has 8 states. Word has length 29 [2018-06-22 12:16:02,666 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 12:16:02,687 INFO ]: With dead ends: 357 [2018-06-22 12:16:02,687 INFO ]: Without dead ends: 357 [2018-06-22 12:16:02,688 INFO ]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2018-06-22 12:16:02,688 INFO ]: Start minimizeSevpa. Operand 357 states. [2018-06-22 12:16:02,852 INFO ]: Finished minimizeSevpa. Reduced states from 357 to 341. [2018-06-22 12:16:02,852 INFO ]: Start removeUnreachable. Operand 341 states. [2018-06-22 12:16:02,868 INFO ]: Finished removeUnreachable. Reduced from 341 states to 341 states and 2067 transitions. [2018-06-22 12:16:02,868 INFO ]: Start accepts. Automaton has 341 states and 2067 transitions. Word has length 29 [2018-06-22 12:16:02,868 INFO ]: Finished accepts. word is rejected. [2018-06-22 12:16:02,868 INFO ]: Abstraction has 341 states and 2067 transitions. [2018-06-22 12:16:02,868 INFO ]: Interpolant automaton has 8 states. [2018-06-22 12:16:02,868 INFO ]: Start isEmpty. Operand 341 states and 2067 transitions. [2018-06-22 12:16:02,885 INFO ]: Finished isEmpty. Found accepting run of length 78 [2018-06-22 12:16:02,885 INFO ]: Found error trace [2018-06-22 12:16:02,886 INFO ]: trace histogram [8, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 12:16:02,886 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:16:02,886 INFO ]: Analyzing trace with hash -840187147, now seen corresponding path program 1 times [2018-06-22 12:16:02,886 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:16:02,886 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:16:02,887 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:16:02,887 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 12:16:02,887 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:16:02,912 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:16:03,086 INFO ]: Checked inductivity of 112 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2018-06-22 12:16:03,086 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 12:16:03,086 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 12:16:03,101 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:16:03,167 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:16:03,172 INFO ]: Computing forward predicates... [2018-06-22 12:16:03,466 INFO ]: Checked inductivity of 112 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-06-22 12:16:03,498 INFO ]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-06-22 12:16:03,498 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2018-06-22 12:16:03,499 INFO ]: Interpolant automaton has 6 states [2018-06-22 12:16:03,499 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 12:16:03,499 INFO ]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-06-22 12:16:03,499 INFO ]: Start difference. First operand 341 states and 2067 transitions. Second operand 6 states. [2018-06-22 12:16:04,157 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 12:16:04,157 INFO ]: Finished difference Result 387 states and 2557 transitions. [2018-06-22 12:16:04,157 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 12:16:04,158 INFO ]: Start accepts. Automaton has 6 states. Word has length 77 [2018-06-22 12:16:04,158 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 12:16:04,177 INFO ]: With dead ends: 387 [2018-06-22 12:16:04,177 INFO ]: Without dead ends: 387 [2018-06-22 12:16:04,177 INFO ]: 0 DeclaredPredicates, 80 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-06-22 12:16:04,178 INFO ]: Start minimizeSevpa. Operand 387 states. [2018-06-22 12:16:04,334 INFO ]: Finished minimizeSevpa. Reduced states from 387 to 379. [2018-06-22 12:16:04,334 INFO ]: Start removeUnreachable. Operand 379 states. [2018-06-22 12:16:04,348 INFO ]: Finished removeUnreachable. Reduced from 379 states to 379 states and 2532 transitions. [2018-06-22 12:16:04,349 INFO ]: Start accepts. Automaton has 379 states and 2532 transitions. Word has length 77 [2018-06-22 12:16:04,349 INFO ]: Finished accepts. word is rejected. [2018-06-22 12:16:04,349 INFO ]: Abstraction has 379 states and 2532 transitions. [2018-06-22 12:16:04,349 INFO ]: Interpolant automaton has 6 states. [2018-06-22 12:16:04,349 INFO ]: Start isEmpty. Operand 379 states and 2532 transitions. [2018-06-22 12:16:04,367 INFO ]: Finished isEmpty. Found accepting run of length 38 [2018-06-22 12:16:04,367 INFO ]: Found error trace [2018-06-22 12:16:04,367 INFO ]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 12:16:04,367 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:16:04,367 INFO ]: Analyzing trace with hash -8834622, now seen corresponding path program 1 times [2018-06-22 12:16:04,367 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:16:04,367 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:16:04,369 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:16:04,369 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:16:04,369 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:16:04,393 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:16:04,557 INFO ]: Checked inductivity of 37 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-06-22 12:16:04,557 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 12:16:04,557 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) [2018-06-22 12:16:04,571 INFO ]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 12:16:04,618 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:16:04,621 INFO ]: Computing forward predicates... [2018-06-22 12:16:04,900 INFO ]: Checked inductivity of 37 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-06-22 12:16:04,918 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 12:16:04,918 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2018-06-22 12:16:04,919 INFO ]: Interpolant automaton has 12 states [2018-06-22 12:16:04,919 INFO ]: Constructing interpolant automaton starting with 12 interpolants. [2018-06-22 12:16:04,919 INFO ]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2018-06-22 12:16:04,919 INFO ]: Start difference. First operand 379 states and 2532 transitions. Second operand 12 states. [2018-06-22 12:16:09,243 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 12:16:09,244 INFO ]: Finished difference Result 912 states and 10657 transitions. [2018-06-22 12:16:09,245 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-06-22 12:16:09,245 INFO ]: Start accepts. Automaton has 12 states. Word has length 37 [2018-06-22 12:16:09,245 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 12:16:09,378 INFO ]: With dead ends: 912 [2018-06-22 12:16:09,378 INFO ]: Without dead ends: 912 [2018-06-22 12:16:09,379 INFO ]: 0 DeclaredPredicates, 89 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 811 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=549, Invalid=2313, Unknown=0, NotChecked=0, Total=2862 [2018-06-22 12:16:09,380 INFO ]: Start minimizeSevpa. Operand 912 states. [2018-06-22 12:16:10,519 INFO ]: Finished minimizeSevpa. Reduced states from 912 to 493. [2018-06-22 12:16:10,519 INFO ]: Start removeUnreachable. Operand 493 states. [2018-06-22 12:16:10,541 INFO ]: Finished removeUnreachable. Reduced from 493 states to 493 states and 4173 transitions. [2018-06-22 12:16:10,541 INFO ]: Start accepts. Automaton has 493 states and 4173 transitions. Word has length 37 [2018-06-22 12:16:10,542 INFO ]: Finished accepts. word is rejected. [2018-06-22 12:16:10,542 INFO ]: Abstraction has 493 states and 4173 transitions. [2018-06-22 12:16:10,542 INFO ]: Interpolant automaton has 12 states. [2018-06-22 12:16:10,542 INFO ]: Start isEmpty. Operand 493 states and 4173 transitions. [2018-06-22 12:16:10,564 INFO ]: Finished isEmpty. Found accepting run of length 46 [2018-06-22 12:16:10,564 INFO ]: Found error trace [2018-06-22 12:16:10,564 INFO ]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 12:16:10,564 INFO ]: === Iteration 9 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:16:10,564 INFO ]: Analyzing trace with hash 759942228, now seen corresponding path program 1 times [2018-06-22 12:16:10,564 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:16:10,564 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:16:10,565 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:16:10,565 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:16:10,565 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:16:10,582 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:16:10,821 INFO ]: Checked inductivity of 67 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2018-06-22 12:16:10,821 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 12:16:10,821 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-06-22 12:16:10,834 INFO ]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 12:16:10,876 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:16:10,879 INFO ]: Computing forward predicates... [2018-06-22 12:16:10,943 INFO ]: Checked inductivity of 67 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2018-06-22 12:16:10,974 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 12:16:10,974 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2018-06-22 12:16:10,975 INFO ]: Interpolant automaton has 9 states [2018-06-22 12:16:10,975 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 12:16:10,975 INFO ]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2018-06-22 12:16:10,975 INFO ]: Start difference. First operand 493 states and 4173 transitions. Second operand 9 states. [2018-06-22 12:16:11,357 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 12:16:11,357 INFO ]: Finished difference Result 600 states and 4181 transitions. [2018-06-22 12:16:11,357 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-06-22 12:16:11,357 INFO ]: Start accepts. Automaton has 9 states. Word has length 45 [2018-06-22 12:16:11,358 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 12:16:11,384 INFO ]: With dead ends: 600 [2018-06-22 12:16:11,384 INFO ]: Without dead ends: 598 [2018-06-22 12:16:11,384 INFO ]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2018-06-22 12:16:11,385 INFO ]: Start minimizeSevpa. Operand 598 states. [2018-06-22 12:16:11,691 INFO ]: Finished minimizeSevpa. Reduced states from 598 to 598. [2018-06-22 12:16:11,691 INFO ]: Start removeUnreachable. Operand 598 states. [2018-06-22 12:16:11,768 INFO ]: Finished removeUnreachable. Reduced from 598 states to 598 states and 4168 transitions. [2018-06-22 12:16:11,769 INFO ]: Start accepts. Automaton has 598 states and 4168 transitions. Word has length 45 [2018-06-22 12:16:11,769 INFO ]: Finished accepts. word is rejected. [2018-06-22 12:16:11,769 INFO ]: Abstraction has 598 states and 4168 transitions. [2018-06-22 12:16:11,769 INFO ]: Interpolant automaton has 9 states. [2018-06-22 12:16:11,769 INFO ]: Start isEmpty. Operand 598 states and 4168 transitions. [2018-06-22 12:16:11,791 INFO ]: Finished isEmpty. Found accepting run of length 38 [2018-06-22 12:16:11,791 INFO ]: Found error trace [2018-06-22 12:16:11,791 INFO ]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 12:16:11,791 INFO ]: === Iteration 10 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:16:11,791 INFO ]: Analyzing trace with hash 760163530, now seen corresponding path program 1 times [2018-06-22 12:16:11,791 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:16:11,791 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:16:11,792 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:16:11,792 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:16:11,792 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:16:11,802 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:16:12,032 INFO ]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-06-22 12:16:12,032 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 12:16:12,032 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-06-22 12:16:12,042 INFO ]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 12:16:12,120 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:16:12,124 INFO ]: Computing forward predicates... [2018-06-22 12:16:12,408 INFO ]: Checked inductivity of 17 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-06-22 12:16:12,427 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 12:16:12,427 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 8 [2018-06-22 12:16:12,427 INFO ]: Interpolant automaton has 8 states [2018-06-22 12:16:12,427 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 12:16:12,427 INFO ]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2018-06-22 12:16:12,427 INFO ]: Start difference. First operand 598 states and 4168 transitions. Second operand 8 states. [2018-06-22 12:16:14,108 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 12:16:14,108 INFO ]: Finished difference Result 604 states and 4213 transitions. [2018-06-22 12:16:14,110 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 12:16:14,110 INFO ]: Start accepts. Automaton has 8 states. Word has length 37 [2018-06-22 12:16:14,110 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 12:16:14,154 INFO ]: With dead ends: 604 [2018-06-22 12:16:14,154 INFO ]: Without dead ends: 602 [2018-06-22 12:16:14,154 INFO ]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2018-06-22 12:16:14,155 INFO ]: Start minimizeSevpa. Operand 602 states. [2018-06-22 12:16:14,409 INFO ]: Finished minimizeSevpa. Reduced states from 602 to 598. [2018-06-22 12:16:14,409 INFO ]: Start removeUnreachable. Operand 598 states. [2018-06-22 12:16:14,436 INFO ]: Finished removeUnreachable. Reduced from 598 states to 598 states and 4162 transitions. [2018-06-22 12:16:14,436 INFO ]: Start accepts. Automaton has 598 states and 4162 transitions. Word has length 37 [2018-06-22 12:16:14,436 INFO ]: Finished accepts. word is rejected. [2018-06-22 12:16:14,436 INFO ]: Abstraction has 598 states and 4162 transitions. [2018-06-22 12:16:14,436 INFO ]: Interpolant automaton has 8 states. [2018-06-22 12:16:14,436 INFO ]: Start isEmpty. Operand 598 states and 4162 transitions. [2018-06-22 12:16:14,460 INFO ]: Finished isEmpty. Found accepting run of length 46 [2018-06-22 12:16:14,460 INFO ]: Found error trace [2018-06-22 12:16:14,460 INFO ]: trace histogram [5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 12:16:14,460 INFO ]: === Iteration 11 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:16:14,460 INFO ]: Analyzing trace with hash -339667877, now seen corresponding path program 1 times [2018-06-22 12:16:14,460 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:16:14,460 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:16:14,461 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:16:14,461 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:16:14,461 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:16:14,469 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:16:14,692 WARN ]: Spent 153.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 7 [2018-06-22 12:16:14,789 INFO ]: Checked inductivity of 40 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-06-22 12:16:14,789 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 12:16:14,789 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 12:16:14,800 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:16:14,837 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:16:14,839 INFO ]: Computing forward predicates... [2018-06-22 12:16:14,881 INFO ]: Checked inductivity of 40 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-06-22 12:16:14,902 INFO ]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-06-22 12:16:14,902 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2018-06-22 12:16:14,902 INFO ]: Interpolant automaton has 6 states [2018-06-22 12:16:14,902 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 12:16:14,903 INFO ]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-06-22 12:16:14,903 INFO ]: Start difference. First operand 598 states and 4162 transitions. Second operand 6 states. [2018-06-22 12:16:15,019 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 12:16:15,019 INFO ]: Finished difference Result 608 states and 4325 transitions. [2018-06-22 12:16:15,019 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 12:16:15,019 INFO ]: Start accepts. Automaton has 6 states. Word has length 45 [2018-06-22 12:16:15,019 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 12:16:15,045 INFO ]: With dead ends: 608 [2018-06-22 12:16:15,045 INFO ]: Without dead ends: 608 [2018-06-22 12:16:15,045 INFO ]: 0 DeclaredPredicates, 51 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-06-22 12:16:15,045 INFO ]: Start minimizeSevpa. Operand 608 states. [2018-06-22 12:16:15,258 INFO ]: Finished minimizeSevpa. Reduced states from 608 to 600. [2018-06-22 12:16:15,258 INFO ]: Start removeUnreachable. Operand 600 states. [2018-06-22 12:16:15,286 INFO ]: Finished removeUnreachable. Reduced from 600 states to 600 states and 4220 transitions. [2018-06-22 12:16:15,286 INFO ]: Start accepts. Automaton has 600 states and 4220 transitions. Word has length 45 [2018-06-22 12:16:15,286 INFO ]: Finished accepts. word is rejected. [2018-06-22 12:16:15,286 INFO ]: Abstraction has 600 states and 4220 transitions. [2018-06-22 12:16:15,286 INFO ]: Interpolant automaton has 6 states. [2018-06-22 12:16:15,286 INFO ]: Start isEmpty. Operand 600 states and 4220 transitions. [2018-06-22 12:16:15,314 INFO ]: Finished isEmpty. Found accepting run of length 46 [2018-06-22 12:16:15,314 INFO ]: Found error trace [2018-06-22 12:16:15,314 INFO ]: trace histogram [5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 12:16:15,314 INFO ]: === Iteration 12 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:16:15,315 INFO ]: Analyzing trace with hash 1896580823, now seen corresponding path program 2 times [2018-06-22 12:16:15,315 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:16:15,315 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:16:15,315 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:16:15,315 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:16:15,315 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:16:15,324 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:16:15,506 INFO ]: Checked inductivity of 40 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-22 12:16:15,506 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 12:16:15,506 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-06-22 12:16:15,518 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 12:16:15,566 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 12:16:15,566 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:16:15,569 INFO ]: Computing forward predicates... [2018-06-22 12:16:16,054 INFO ]: Checked inductivity of 40 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 12:16:16,082 INFO ]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-06-22 12:16:16,082 INFO ]: Number of different interpolants: perfect sequences [6] imperfect sequences [4] total 8 [2018-06-22 12:16:16,082 INFO ]: Interpolant automaton has 8 states [2018-06-22 12:16:16,082 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 12:16:16,082 INFO ]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2018-06-22 12:16:16,082 INFO ]: Start difference. First operand 600 states and 4220 transitions. Second operand 8 states. [2018-06-22 12:16:16,374 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 12:16:16,374 INFO ]: Finished difference Result 773 states and 6465 transitions. [2018-06-22 12:16:16,374 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-22 12:16:16,374 INFO ]: Start accepts. Automaton has 8 states. Word has length 45 [2018-06-22 12:16:16,374 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 12:16:16,419 INFO ]: With dead ends: 773 [2018-06-22 12:16:16,419 INFO ]: Without dead ends: 773 [2018-06-22 12:16:16,419 INFO ]: 0 DeclaredPredicates, 50 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2018-06-22 12:16:16,419 INFO ]: Start minimizeSevpa. Operand 773 states. [2018-06-22 12:16:16,683 INFO ]: Finished minimizeSevpa. Reduced states from 773 to 687. [2018-06-22 12:16:16,683 INFO ]: Start removeUnreachable. Operand 687 states. [2018-06-22 12:16:16,704 INFO ]: Finished removeUnreachable. Reduced from 687 states to 687 states and 5130 transitions. [2018-06-22 12:16:16,704 INFO ]: Start accepts. Automaton has 687 states and 5130 transitions. Word has length 45 [2018-06-22 12:16:16,739 INFO ]: Finished accepts. word is rejected. [2018-06-22 12:16:16,739 INFO ]: Abstraction has 687 states and 5130 transitions. [2018-06-22 12:16:16,739 INFO ]: Interpolant automaton has 8 states. [2018-06-22 12:16:16,739 INFO ]: Start isEmpty. Operand 687 states and 5130 transitions. [2018-06-22 12:16:16,750 INFO ]: Finished isEmpty. Found accepting run of length 38 [2018-06-22 12:16:16,750 INFO ]: Found error trace [2018-06-22 12:16:16,750 INFO ]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 12:16:16,750 INFO ]: === Iteration 13 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:16:16,750 INFO ]: Analyzing trace with hash -1491203373, now seen corresponding path program 1 times [2018-06-22 12:16:16,750 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:16:16,750 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:16:16,751 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:16:16,751 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 12:16:16,751 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:16:16,758 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:16:16,801 INFO ]: Checked inductivity of 17 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-06-22 12:16:16,801 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 12:16:16,801 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 12:16:16,806 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:16:16,838 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:16:16,840 INFO ]: Computing forward predicates... [2018-06-22 12:16:16,886 INFO ]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-06-22 12:16:16,912 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 12:16:16,912 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 10 [2018-06-22 12:16:16,912 INFO ]: Interpolant automaton has 10 states [2018-06-22 12:16:16,912 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-22 12:16:16,912 INFO ]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-06-22 12:16:16,912 INFO ]: Start difference. First operand 687 states and 5130 transitions. Second operand 10 states. [2018-06-22 12:16:17,659 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 12:16:17,659 INFO ]: Finished difference Result 1015 states and 11447 transitions. [2018-06-22 12:16:17,659 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-06-22 12:16:17,659 INFO ]: Start accepts. Automaton has 10 states. Word has length 37 [2018-06-22 12:16:17,659 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 12:16:17,754 INFO ]: With dead ends: 1015 [2018-06-22 12:16:17,754 INFO ]: Without dead ends: 993 [2018-06-22 12:16:17,754 INFO ]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2018-06-22 12:16:17,755 INFO ]: Start minimizeSevpa. Operand 993 states. [2018-06-22 12:16:18,233 INFO ]: Finished minimizeSevpa. Reduced states from 993 to 945. [2018-06-22 12:16:18,233 INFO ]: Start removeUnreachable. Operand 945 states. [2018-06-22 12:16:18,300 INFO ]: Finished removeUnreachable. Reduced from 945 states to 945 states and 10748 transitions. [2018-06-22 12:16:18,300 INFO ]: Start accepts. Automaton has 945 states and 10748 transitions. Word has length 37 [2018-06-22 12:16:18,300 INFO ]: Finished accepts. word is rejected. [2018-06-22 12:16:18,300 INFO ]: Abstraction has 945 states and 10748 transitions. [2018-06-22 12:16:18,300 INFO ]: Interpolant automaton has 10 states. [2018-06-22 12:16:18,300 INFO ]: Start isEmpty. Operand 945 states and 10748 transitions. [2018-06-22 12:16:18,327 INFO ]: Finished isEmpty. Found accepting run of length 126 [2018-06-22 12:16:18,327 INFO ]: Found error trace [2018-06-22 12:16:18,327 INFO ]: trace histogram [12, 7, 6, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 12:16:18,327 INFO ]: === Iteration 14 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:16:18,327 INFO ]: Analyzing trace with hash -1720568723, now seen corresponding path program 1 times [2018-06-22 12:16:18,327 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:16:18,327 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:16:18,331 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:16:18,331 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:16:18,331 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:16:18,346 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:16:18,480 INFO ]: Checked inductivity of 355 backedges. 4 proven. 50 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-06-22 12:16:18,480 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 12:16:18,480 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 12:16:18,486 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:16:18,554 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:16:18,558 INFO ]: Computing forward predicates... [2018-06-22 12:16:18,881 INFO ]: Checked inductivity of 355 backedges. 167 proven. 0 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2018-06-22 12:16:18,902 INFO ]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-06-22 12:16:18,902 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2018-06-22 12:16:18,903 INFO ]: Interpolant automaton has 6 states [2018-06-22 12:16:18,903 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 12:16:18,903 INFO ]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-06-22 12:16:18,903 INFO ]: Start difference. First operand 945 states and 10748 transitions. Second operand 6 states. [2018-06-22 12:16:19,143 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 12:16:19,143 INFO ]: Finished difference Result 959 states and 10878 transitions. [2018-06-22 12:16:19,144 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 12:16:19,144 INFO ]: Start accepts. Automaton has 6 states. Word has length 125 [2018-06-22 12:16:19,144 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 12:16:19,230 INFO ]: With dead ends: 959 [2018-06-22 12:16:19,230 INFO ]: Without dead ends: 959 [2018-06-22 12:16:19,230 INFO ]: 0 DeclaredPredicates, 128 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-06-22 12:16:19,231 INFO ]: Start minimizeSevpa. Operand 959 states. [2018-06-22 12:16:19,835 INFO ]: Finished minimizeSevpa. Reduced states from 959 to 957. [2018-06-22 12:16:19,835 INFO ]: Start removeUnreachable. Operand 957 states. [2018-06-22 12:16:19,880 INFO ]: Finished removeUnreachable. Reduced from 957 states to 957 states and 10871 transitions. [2018-06-22 12:16:19,880 INFO ]: Start accepts. Automaton has 957 states and 10871 transitions. Word has length 125 [2018-06-22 12:16:19,880 INFO ]: Finished accepts. word is rejected. [2018-06-22 12:16:19,880 INFO ]: Abstraction has 957 states and 10871 transitions. [2018-06-22 12:16:19,880 INFO ]: Interpolant automaton has 6 states. [2018-06-22 12:16:19,880 INFO ]: Start isEmpty. Operand 957 states and 10871 transitions. [2018-06-22 12:16:19,892 INFO ]: Finished isEmpty. Found accepting run of length 46 [2018-06-22 12:16:19,892 INFO ]: Found error trace [2018-06-22 12:16:19,892 INFO ]: trace histogram [5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 12:16:19,892 INFO ]: === Iteration 15 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:16:19,892 INFO ]: Analyzing trace with hash 1380834834, now seen corresponding path program 1 times [2018-06-22 12:16:19,892 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:16:19,892 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:16:19,892 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:16:19,892 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:16:19,892 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:16:19,904 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:16:20,262 INFO ]: Checked inductivity of 63 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-06-22 12:16:20,262 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 12:16:20,262 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-06-22 12:16:20,279 INFO ]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 12:16:20,321 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:16:20,323 INFO ]: Computing forward predicates... [2018-06-22 12:16:20,684 INFO ]: Checked inductivity of 63 backedges. 36 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-06-22 12:16:20,703 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 12:16:20,704 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2018-06-22 12:16:20,704 INFO ]: Interpolant automaton has 10 states [2018-06-22 12:16:20,704 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-22 12:16:20,704 INFO ]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-06-22 12:16:20,704 INFO ]: Start difference. First operand 957 states and 10871 transitions. Second operand 10 states. [2018-06-22 12:16:22,077 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 12:16:22,078 INFO ]: Finished difference Result 1713 states and 22040 transitions. [2018-06-22 12:16:22,078 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-06-22 12:16:22,078 INFO ]: Start accepts. Automaton has 10 states. Word has length 45 [2018-06-22 12:16:22,078 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 12:16:22,337 INFO ]: With dead ends: 1713 [2018-06-22 12:16:22,337 INFO ]: Without dead ends: 1671 [2018-06-22 12:16:22,337 INFO ]: 0 DeclaredPredicates, 83 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2018-06-22 12:16:22,342 INFO ]: Start minimizeSevpa. Operand 1671 states. [2018-06-22 12:16:23,085 INFO ]: Finished minimizeSevpa. Reduced states from 1671 to 1377. [2018-06-22 12:16:23,085 INFO ]: Start removeUnreachable. Operand 1377 states. [2018-06-22 12:16:23,152 INFO ]: Finished removeUnreachable. Reduced from 1377 states to 1377 states and 16768 transitions. [2018-06-22 12:16:23,152 INFO ]: Start accepts. Automaton has 1377 states and 16768 transitions. Word has length 45 [2018-06-22 12:16:23,152 INFO ]: Finished accepts. word is rejected. [2018-06-22 12:16:23,152 INFO ]: Abstraction has 1377 states and 16768 transitions. [2018-06-22 12:16:23,152 INFO ]: Interpolant automaton has 10 states. [2018-06-22 12:16:23,152 INFO ]: Start isEmpty. Operand 1377 states and 16768 transitions. [2018-06-22 12:16:23,175 INFO ]: Finished isEmpty. Found accepting run of length 98 [2018-06-22 12:16:23,175 INFO ]: Found error trace [2018-06-22 12:16:23,175 INFO ]: trace histogram [10, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 12:16:23,176 INFO ]: === Iteration 16 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:16:23,177 INFO ]: Analyzing trace with hash 465857421, now seen corresponding path program 1 times [2018-06-22 12:16:23,177 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:16:23,177 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:16:23,178 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:16:23,178 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:16:23,178 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:16:23,194 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:16:23,354 INFO ]: Checked inductivity of 173 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2018-06-22 12:16:23,354 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 12:16:23,354 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 12:16:23,360 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:16:23,418 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:16:23,422 INFO ]: Computing forward predicates... [2018-06-22 12:16:23,482 INFO ]: Checked inductivity of 173 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2018-06-22 12:16:23,501 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 12:16:23,501 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2018-06-22 12:16:23,501 INFO ]: Interpolant automaton has 10 states [2018-06-22 12:16:23,502 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-22 12:16:23,502 INFO ]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-06-22 12:16:23,503 INFO ]: Start difference. First operand 1377 states and 16768 transitions. Second operand 10 states. [2018-06-22 12:16:25,200 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 12:16:25,200 INFO ]: Finished difference Result 4110 states and 75510 transitions. [2018-06-22 12:16:25,201 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-06-22 12:16:25,201 INFO ]: Start accepts. Automaton has 10 states. Word has length 97 [2018-06-22 12:16:25,201 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 12:16:26,372 INFO ]: With dead ends: 4110 [2018-06-22 12:16:26,372 INFO ]: Without dead ends: 4027 [2018-06-22 12:16:26,373 INFO ]: 0 DeclaredPredicates, 139 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=590, Unknown=0, NotChecked=0, Total=756 [2018-06-22 12:16:26,374 INFO ]: Start minimizeSevpa. Operand 4027 states. [2018-06-22 12:16:35,272 INFO ]: Finished minimizeSevpa. Reduced states from 4027 to 3310. [2018-06-22 12:16:35,272 INFO ]: Start removeUnreachable. Operand 3310 states. [2018-06-22 12:16:35,582 INFO ]: Finished removeUnreachable. Reduced from 3310 states to 3310 states and 51613 transitions. [2018-06-22 12:16:35,582 INFO ]: Start accepts. Automaton has 3310 states and 51613 transitions. Word has length 97 [2018-06-22 12:16:35,582 INFO ]: Finished accepts. word is rejected. [2018-06-22 12:16:35,582 INFO ]: Abstraction has 3310 states and 51613 transitions. [2018-06-22 12:16:35,582 INFO ]: Interpolant automaton has 10 states. [2018-06-22 12:16:35,582 INFO ]: Start isEmpty. Operand 3310 states and 51613 transitions. [2018-06-22 12:16:35,628 INFO ]: Finished isEmpty. Found accepting run of length 86 [2018-06-22 12:16:35,628 INFO ]: Found error trace [2018-06-22 12:16:35,628 INFO ]: trace histogram [8, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 12:16:35,628 INFO ]: === Iteration 17 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:16:35,629 INFO ]: Analyzing trace with hash 1699739268, now seen corresponding path program 1 times [2018-06-22 12:16:35,629 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:16:35,629 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:16:35,629 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:16:35,629 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:16:35,629 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:16:35,639 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:16:35,889 INFO ]: Checked inductivity of 156 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2018-06-22 12:16:35,889 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 12:16:35,889 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-06-22 12:16:35,902 INFO ]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 12:16:35,961 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:16:35,964 INFO ]: Computing forward predicates... [2018-06-22 12:16:36,029 INFO ]: Checked inductivity of 156 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-06-22 12:16:36,048 INFO ]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-06-22 12:16:36,048 INFO ]: Number of different interpolants: perfect sequences [6] imperfect sequences [4] total 8 [2018-06-22 12:16:36,048 INFO ]: Interpolant automaton has 8 states [2018-06-22 12:16:36,048 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 12:16:36,049 INFO ]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2018-06-22 12:16:36,049 INFO ]: Start difference. First operand 3310 states and 51613 transitions. Second operand 8 states. [2018-06-22 12:16:37,081 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 12:16:37,081 INFO ]: Finished difference Result 3474 states and 58970 transitions. [2018-06-22 12:16:37,082 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-22 12:16:37,082 INFO ]: Start accepts. Automaton has 8 states. Word has length 85 [2018-06-22 12:16:37,082 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 12:16:37,900 INFO ]: With dead ends: 3474 [2018-06-22 12:16:37,900 INFO ]: Without dead ends: 3464 [2018-06-22 12:16:37,900 INFO ]: 0 DeclaredPredicates, 98 GetRequests, 85 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2018-06-22 12:16:37,902 INFO ]: Start minimizeSevpa. Operand 3464 states. [2018-06-22 12:16:42,255 INFO ]: Finished minimizeSevpa. Reduced states from 3464 to 3379. [2018-06-22 12:16:42,255 INFO ]: Start removeUnreachable. Operand 3379 states. [2018-06-22 12:16:42,640 INFO ]: Finished removeUnreachable. Reduced from 3379 states to 3379 states and 54832 transitions. [2018-06-22 12:16:42,641 INFO ]: Start accepts. Automaton has 3379 states and 54832 transitions. Word has length 85 [2018-06-22 12:16:42,641 INFO ]: Finished accepts. word is rejected. [2018-06-22 12:16:42,641 INFO ]: Abstraction has 3379 states and 54832 transitions. [2018-06-22 12:16:42,641 INFO ]: Interpolant automaton has 8 states. [2018-06-22 12:16:42,641 INFO ]: Start isEmpty. Operand 3379 states and 54832 transitions. [2018-06-22 12:16:42,669 INFO ]: Finished isEmpty. Found accepting run of length 50 [2018-06-22 12:16:42,669 INFO ]: Found error trace [2018-06-22 12:16:42,669 INFO ]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 12:16:42,669 INFO ]: === Iteration 18 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:16:42,669 INFO ]: Analyzing trace with hash 1749875552, now seen corresponding path program 1 times [2018-06-22 12:16:42,669 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:16:42,669 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:16:42,670 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:16:42,670 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:16:42,670 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:16:42,675 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:16:42,789 INFO ]: Checked inductivity of 38 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 12:16:42,789 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 12:16:42,789 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 12:16:42,794 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:16:42,817 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:16:42,818 INFO ]: Computing forward predicates... [2018-06-22 12:16:42,851 INFO ]: Checked inductivity of 38 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2018-06-22 12:16:42,870 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 12:16:42,870 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2018-06-22 12:16:42,870 INFO ]: Interpolant automaton has 10 states [2018-06-22 12:16:42,870 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-22 12:16:42,870 INFO ]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2018-06-22 12:16:42,870 INFO ]: Start difference. First operand 3379 states and 54832 transitions. Second operand 10 states. [2018-06-22 12:16:43,770 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 12:16:43,770 INFO ]: Finished difference Result 3415 states and 55842 transitions. [2018-06-22 12:16:43,770 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-06-22 12:16:43,770 INFO ]: Start accepts. Automaton has 10 states. Word has length 49 [2018-06-22 12:16:43,770 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 12:16:44,551 INFO ]: With dead ends: 3415 [2018-06-22 12:16:44,551 INFO ]: Without dead ends: 3412 [2018-06-22 12:16:44,552 INFO ]: 0 DeclaredPredicates, 58 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2018-06-22 12:16:44,553 INFO ]: Start minimizeSevpa. Operand 3412 states. [2018-06-22 12:16:47,695 INFO ]: Finished minimizeSevpa. Reduced states from 3412 to 3382. [2018-06-22 12:16:47,695 INFO ]: Start removeUnreachable. Operand 3382 states. [2018-06-22 12:16:48,082 INFO ]: Finished removeUnreachable. Reduced from 3382 states to 3382 states and 54892 transitions. [2018-06-22 12:16:48,082 INFO ]: Start accepts. Automaton has 3382 states and 54892 transitions. Word has length 49 [2018-06-22 12:16:48,082 INFO ]: Finished accepts. word is rejected. [2018-06-22 12:16:48,082 INFO ]: Abstraction has 3382 states and 54892 transitions. [2018-06-22 12:16:48,082 INFO ]: Interpolant automaton has 10 states. [2018-06-22 12:16:48,082 INFO ]: Start isEmpty. Operand 3382 states and 54892 transitions. [2018-06-22 12:16:48,112 INFO ]: Finished isEmpty. Found accepting run of length 94 [2018-06-22 12:16:48,112 INFO ]: Found error trace [2018-06-22 12:16:48,112 INFO ]: trace histogram [9, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 12:16:48,112 INFO ]: === Iteration 19 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:16:48,113 INFO ]: Analyzing trace with hash -2087045692, now seen corresponding path program 1 times [2018-06-22 12:16:48,113 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:16:48,113 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:16:48,113 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:16:48,113 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:16:48,113 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:16:48,130 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:16:48,343 INFO ]: Checked inductivity of 191 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2018-06-22 12:16:48,343 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 12:16:48,343 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 12:16:48,349 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:16:48,391 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:16:48,393 INFO ]: Computing forward predicates... [2018-06-22 12:16:48,418 INFO ]: Checked inductivity of 191 backedges. 119 proven. 3 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-06-22 12:16:48,437 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 12:16:48,438 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2018-06-22 12:16:48,438 INFO ]: Interpolant automaton has 8 states [2018-06-22 12:16:48,438 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 12:16:48,438 INFO ]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-06-22 12:16:48,438 INFO ]: Start difference. First operand 3382 states and 54892 transitions. Second operand 8 states. [2018-06-22 12:16:49,494 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 12:16:49,494 INFO ]: Finished difference Result 4768 states and 90074 transitions. [2018-06-22 12:16:49,558 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 12:16:49,558 INFO ]: Start accepts. Automaton has 8 states. Word has length 93 [2018-06-22 12:16:49,558 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 12:16:51,396 INFO ]: With dead ends: 4768 [2018-06-22 12:16:51,396 INFO ]: Without dead ends: 4768 [2018-06-22 12:16:51,396 INFO ]: 0 DeclaredPredicates, 99 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-06-22 12:16:51,398 INFO ]: Start minimizeSevpa. Operand 4768 states. Received shutdown request... [2018-06-22 12:16:52,716 WARN ]: Verification canceled [2018-06-22 12:16:52,721 WARN ]: Timeout [2018-06-22 12:16:52,721 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 12:16:52 BoogieIcfgContainer [2018-06-22 12:16:52,721 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 12:16:52,722 INFO ]: Toolchain (without parser) took 59824.90 ms. Allocated memory was 309.3 MB in the beginning and 1.6 GB in the end (delta: 1.3 GB). Free memory was 257.7 MB in the beginning and 297.8 MB in the end (delta: -40.1 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-22 12:16:52,723 INFO ]: SmtParser took 0.06 ms. Allocated memory is still 309.3 MB. Free memory is still 274.8 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 12:16:52,723 INFO ]: ChcToBoogie took 51.02 ms. Allocated memory is still 309.3 MB. Free memory was 257.7 MB in the beginning and 255.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 12:16:52,723 INFO ]: Boogie Preprocessor took 58.77 ms. Allocated memory is still 309.3 MB. Free memory was 255.7 MB in the beginning and 253.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 12:16:52,731 INFO ]: RCFGBuilder took 1182.97 ms. Allocated memory is still 309.3 MB. Free memory was 253.7 MB in the beginning and 222.6 MB in the end (delta: 31.0 MB). Peak memory consumption was 31.0 MB. Max. memory is 3.6 GB. [2018-06-22 12:16:52,731 INFO ]: TraceAbstraction took 58522.71 ms. Allocated memory was 309.3 MB in the beginning and 1.6 GB in the end (delta: 1.3 GB). Free memory was 222.6 MB in the beginning and 297.8 MB in the end (delta: -75.2 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-22 12:16:52,734 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.06 ms. Allocated memory is still 309.3 MB. Free memory is still 274.8 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 51.02 ms. Allocated memory is still 309.3 MB. Free memory was 257.7 MB in the beginning and 255.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 58.77 ms. Allocated memory is still 309.3 MB. Free memory was 255.7 MB in the beginning and 253.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 1182.97 ms. Allocated memory is still 309.3 MB. Free memory was 253.7 MB in the beginning and 222.6 MB in the end (delta: 31.0 MB). Peak memory consumption was 31.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 58522.71 ms. Allocated memory was 309.3 MB in the beginning and 1.6 GB in the end (delta: 1.3 GB). Free memory was 222.6 MB in the beginning and 297.8 MB in the end (delta: -75.2 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [UNKNOWN] : Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 0). Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data CFG has 8 procedures, 104 locations, 1 error locations. TIMEOUT Result, 58.4s OverallTime, 19 OverallIterations, 12 TraceHistogramMax, 26.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3393 SDtfs, 191 SDslu, 14146 SDs, 0 SdLazy, 14211 SolverSat, 2790 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 14.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1132 GetRequests, 900 SyntacticMatches, 11 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1213 ImplicationChecksByTransitivity, 6.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3382occurred in iteration=18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 23.8s AutomataMinimizationTime, 19 MinimizatonAttempts, 1757 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 6.2s InterpolantComputationTime, 1818 NumberOfCodeBlocks, 1818 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 1784 ConstructedInterpolants, 0 QuantifiedInterpolants, 166996 SizeOfPredicates, 31 NumberOfNonLiveVariables, 4821 ConjunctsInSsa, 103 ConjunctsInUnsatCore, 34 InterpolantComputations, 10 PerfectInterpolantSequences, 2434/2714 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/rec__ackermann.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_12-16-52-748.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/rec__ackermann.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_12-16-52-748.csv Completed graceful shutdown