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__limit2.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 12:17:15,112 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 12:17:15,114 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 12:17:15,127 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 12:17:15,127 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 12:17:15,128 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 12:17:15,129 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 12:17:15,135 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 12:17:15,137 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 12:17:15,137 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 12:17:15,138 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 12:17:15,138 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 12:17:15,139 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 12:17:15,140 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 12:17:15,141 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 12:17:15,142 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 12:17:15,143 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 12:17:15,145 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 12:17:15,147 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 12:17:15,148 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 12:17:15,149 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 12:17:15,151 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 12:17:15,152 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 12:17:15,152 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 12:17:15,153 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 12:17:15,154 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 12:17:15,155 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 12:17:15,155 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 12:17:15,156 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 12:17:15,157 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 12:17:15,157 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 12:17:15,158 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 12:17:15,158 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 12:17:15,159 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 12:17:15,160 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 12:17:15,160 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 12:17:15,173 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 12:17:15,173 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 12:17:15,173 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 12:17:15,174 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 12:17:15,175 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 12:17:15,175 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 12:17:15,176 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 12:17:15,176 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 12:17:15,176 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 12:17:15,176 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 12:17:15,177 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 12:17:15,177 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 12:17:15,177 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 12:17:15,177 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 12:17:15,178 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 12:17:15,178 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 12:17:15,178 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 12:17:15,178 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 12:17:15,178 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 12:17:15,180 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 12:17:15,181 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 12:17:15,234 INFO ]: Repository-Root is: /tmp [2018-06-22 12:17:15,247 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 12:17:15,252 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 12:17:15,254 INFO ]: Initializing SmtParser... [2018-06-22 12:17:15,254 INFO ]: SmtParser initialized [2018-06-22 12:17:15,254 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/llreve-bench/smt2/rec__limit2.smt2 [2018-06-22 12:17:15,256 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 12:17:15,345 INFO ]: Executing SMT file /storage/chc-comp/llreve-bench/smt2/rec__limit2.smt2 unknown de.uni_freiburg.informatik.ultimate.plugins.generator.treeautomizer.parsing.HornClauseParserScript$1@49d59bf3 [2018-06-22 12:17:15,539 INFO ]: Succesfully executed SMT file /storage/chc-comp/llreve-bench/smt2/rec__limit2.smt2 [2018-06-22 12:17:15,544 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 12:17:15,550 INFO ]: Walking toolchain with 4 elements. [2018-06-22 12:17:15,551 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 12:17:15,551 INFO ]: Initializing ChcToBoogie... [2018-06-22 12:17:15,551 INFO ]: ChcToBoogie initialized [2018-06-22 12:17:15,555 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 12:17:15" (1/1) ... [2018-06-22 12:17:15,601 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:17:15 Unit [2018-06-22 12:17:15,602 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 12:17:15,602 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 12:17:15,602 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 12:17:15,602 INFO ]: Boogie Preprocessor initialized [2018-06-22 12:17:15,628 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:17:15" (1/1) ... [2018-06-22 12:17:15,628 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:17:15" (1/1) ... [2018-06-22 12:17:15,636 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:17:15" (1/1) ... [2018-06-22 12:17:15,636 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:17:15" (1/1) ... [2018-06-22 12:17:15,642 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:17:15" (1/1) ... [2018-06-22 12:17:15,644 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:17:15" (1/1) ... [2018-06-22 12:17:15,646 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:17:15" (1/1) ... [2018-06-22 12:17:15,647 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 12:17:15,653 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 12:17:15,653 INFO ]: Initializing RCFGBuilder... [2018-06-22 12:17:15,653 INFO ]: RCFGBuilder initialized [2018-06-22 12:17:15,654 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:17:15" (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 12:17:15,665 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 12:17:15,665 INFO ]: Found specification of procedure False [2018-06-22 12:17:15,666 INFO ]: Found implementation of procedure False [2018-06-22 12:17:15,666 INFO ]: Specification and implementation of procedure INV_REC_f__2 given in one single declaration [2018-06-22 12:17:15,666 INFO ]: Found specification of procedure INV_REC_f__2 [2018-06-22 12:17:15,666 INFO ]: Found implementation of procedure INV_REC_f__2 [2018-06-22 12:17:15,666 INFO ]: Specification and implementation of procedure INV_REC_f__2_PRE given in one single declaration [2018-06-22 12:17:15,666 INFO ]: Found specification of procedure INV_REC_f__2_PRE [2018-06-22 12:17:15,666 INFO ]: Found implementation of procedure INV_REC_f__2_PRE [2018-06-22 12:17:15,666 INFO ]: Specification and implementation of procedure INV_REC_f^f_PRE given in one single declaration [2018-06-22 12:17:15,666 INFO ]: Found specification of procedure INV_REC_f^f_PRE [2018-06-22 12:17:15,666 INFO ]: Found implementation of procedure INV_REC_f^f_PRE [2018-06-22 12:17:15,666 INFO ]: Specification and implementation of procedure INV_REC_f__1 given in one single declaration [2018-06-22 12:17:15,666 INFO ]: Found specification of procedure INV_REC_f__1 [2018-06-22 12:17:15,666 INFO ]: Found implementation of procedure INV_REC_f__1 [2018-06-22 12:17:15,666 INFO ]: Specification and implementation of procedure INV_REC_f__1_PRE given in one single declaration [2018-06-22 12:17:15,666 INFO ]: Found specification of procedure INV_REC_f__1_PRE [2018-06-22 12:17:15,666 INFO ]: Found implementation of procedure INV_REC_f__1_PRE [2018-06-22 12:17:15,666 INFO ]: Specification and implementation of procedure INV_REC_f^f given in one single declaration [2018-06-22 12:17:15,666 INFO ]: Found specification of procedure INV_REC_f^f [2018-06-22 12:17:15,666 INFO ]: Found implementation of procedure INV_REC_f^f [2018-06-22 12:17:15,666 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 12:17:15,666 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 12:17:15,666 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 12:17:16,183 INFO ]: Using library mode [2018-06-22 12:17:16,184 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 12:17:16 BoogieIcfgContainer [2018-06-22 12:17:16,184 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 12:17:16,186 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 12:17:16,186 INFO ]: Initializing TraceAbstraction... [2018-06-22 12:17:16,189 INFO ]: TraceAbstraction initialized [2018-06-22 12:17:16,189 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 12:17:15" (1/3) ... [2018-06-22 12:17:16,190 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19e0ef77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 12:17:16, skipping insertion in model container [2018-06-22 12:17:16,190 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:17:15" (2/3) ... [2018-06-22 12:17:16,190 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19e0ef77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 12:17:16, skipping insertion in model container [2018-06-22 12:17:16,191 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 12:17:16" (3/3) ... [2018-06-22 12:17:16,192 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 12:17:16,201 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 12:17:16,210 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 12:17:16,255 INFO ]: Using default assertion order modulation [2018-06-22 12:17:16,255 INFO ]: Interprodecural is true [2018-06-22 12:17:16,255 INFO ]: Hoare is false [2018-06-22 12:17:16,255 INFO ]: Compute interpolants for FPandBP [2018-06-22 12:17:16,255 INFO ]: Backedges is TWOTRACK [2018-06-22 12:17:16,255 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 12:17:16,256 INFO ]: Difference is false [2018-06-22 12:17:16,256 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 12:17:16,256 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 12:17:16,273 INFO ]: Start isEmpty. Operand 47 states. [2018-06-22 12:17:16,285 INFO ]: Finished isEmpty. Found accepting run of length 6 [2018-06-22 12:17:16,285 INFO ]: Found error trace [2018-06-22 12:17:16,286 INFO ]: trace histogram [1, 1, 1, 1, 1] [2018-06-22 12:17:16,286 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:17:16,291 INFO ]: Analyzing trace with hash 130004611, now seen corresponding path program 1 times [2018-06-22 12:17:16,293 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:17:16,294 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:17:16,334 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:17:16,335 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:17:16,335 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:17:16,350 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:17:16,371 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 12:17:16,373 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 12:17:16,373 INFO ]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-06-22 12:17:16,375 INFO ]: Interpolant automaton has 2 states [2018-06-22 12:17:16,390 INFO ]: Constructing interpolant automaton starting with 2 interpolants. [2018-06-22 12:17:16,392 INFO ]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-06-22 12:17:16,394 INFO ]: Start difference. First operand 47 states. Second operand 2 states. [2018-06-22 12:17:16,426 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 12:17:16,426 INFO ]: Finished difference Result 44 states and 67 transitions. [2018-06-22 12:17:16,426 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-06-22 12:17:16,427 INFO ]: Start accepts. Automaton has 2 states. Word has length 5 [2018-06-22 12:17:16,427 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 12:17:16,440 INFO ]: With dead ends: 44 [2018-06-22 12:17:16,440 INFO ]: Without dead ends: 44 [2018-06-22 12:17:16,442 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 12:17:16,459 INFO ]: Start minimizeSevpa. Operand 44 states. [2018-06-22 12:17:16,484 INFO ]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-06-22 12:17:16,485 INFO ]: Start removeUnreachable. Operand 44 states. [2018-06-22 12:17:16,488 INFO ]: Finished removeUnreachable. Reduced from 44 states to 44 states and 67 transitions. [2018-06-22 12:17:16,489 INFO ]: Start accepts. Automaton has 44 states and 67 transitions. Word has length 5 [2018-06-22 12:17:16,489 INFO ]: Finished accepts. word is rejected. [2018-06-22 12:17:16,489 INFO ]: Abstraction has 44 states and 67 transitions. [2018-06-22 12:17:16,489 INFO ]: Interpolant automaton has 2 states. [2018-06-22 12:17:16,489 INFO ]: Start isEmpty. Operand 44 states and 67 transitions. [2018-06-22 12:17:16,492 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 12:17:16,492 INFO ]: Found error trace [2018-06-22 12:17:16,492 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 12:17:16,492 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:17:16,492 INFO ]: Analyzing trace with hash 1130571507, now seen corresponding path program 1 times [2018-06-22 12:17:16,492 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:17:16,492 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:17:16,493 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:17:16,493 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:17:16,493 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:17:16,515 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:17:16,594 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 12:17:16,594 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 12:17:16,594 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 12:17:16,596 INFO ]: Interpolant automaton has 4 states [2018-06-22 12:17:16,596 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 12:17:16,596 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 12:17:16,596 INFO ]: Start difference. First operand 44 states and 67 transitions. Second operand 4 states. [2018-06-22 12:17:16,650 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 12:17:16,650 INFO ]: Finished difference Result 48 states and 71 transitions. [2018-06-22 12:17:16,651 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 12:17:16,651 INFO ]: Start accepts. Automaton has 4 states. Word has length 13 [2018-06-22 12:17:16,651 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 12:17:16,653 INFO ]: With dead ends: 48 [2018-06-22 12:17:16,653 INFO ]: Without dead ends: 48 [2018-06-22 12:17:16,653 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 12:17:16,654 INFO ]: Start minimizeSevpa. Operand 48 states. [2018-06-22 12:17:16,665 INFO ]: Finished minimizeSevpa. Reduced states from 48 to 46. [2018-06-22 12:17:16,665 INFO ]: Start removeUnreachable. Operand 46 states. [2018-06-22 12:17:16,667 INFO ]: Finished removeUnreachable. Reduced from 46 states to 46 states and 69 transitions. [2018-06-22 12:17:16,667 INFO ]: Start accepts. Automaton has 46 states and 69 transitions. Word has length 13 [2018-06-22 12:17:16,668 INFO ]: Finished accepts. word is rejected. [2018-06-22 12:17:16,668 INFO ]: Abstraction has 46 states and 69 transitions. [2018-06-22 12:17:16,668 INFO ]: Interpolant automaton has 4 states. [2018-06-22 12:17:16,668 INFO ]: Start isEmpty. Operand 46 states and 69 transitions. [2018-06-22 12:17:16,669 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 12:17:16,669 INFO ]: Found error trace [2018-06-22 12:17:16,669 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 12:17:16,670 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:17:16,670 INFO ]: Analyzing trace with hash -2001887942, now seen corresponding path program 1 times [2018-06-22 12:17:16,670 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:17:16,670 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:17:16,670 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:17:16,670 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:17:16,670 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:17:16,679 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:17:16,756 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 12:17:16,756 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 12:17:16,756 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 12:17:16,756 INFO ]: Interpolant automaton has 4 states [2018-06-22 12:17:16,756 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 12:17:16,756 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 12:17:16,757 INFO ]: Start difference. First operand 46 states and 69 transitions. Second operand 4 states. [2018-06-22 12:17:16,838 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 12:17:16,838 INFO ]: Finished difference Result 48 states and 72 transitions. [2018-06-22 12:17:16,838 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 12:17:16,838 INFO ]: Start accepts. Automaton has 4 states. Word has length 13 [2018-06-22 12:17:16,838 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 12:17:16,840 INFO ]: With dead ends: 48 [2018-06-22 12:17:16,840 INFO ]: Without dead ends: 48 [2018-06-22 12:17:16,840 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 12:17:16,841 INFO ]: Start minimizeSevpa. Operand 48 states. [2018-06-22 12:17:16,851 INFO ]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-06-22 12:17:16,851 INFO ]: Start removeUnreachable. Operand 48 states. [2018-06-22 12:17:16,853 INFO ]: Finished removeUnreachable. Reduced from 48 states to 48 states and 72 transitions. [2018-06-22 12:17:16,853 INFO ]: Start accepts. Automaton has 48 states and 72 transitions. Word has length 13 [2018-06-22 12:17:16,853 INFO ]: Finished accepts. word is rejected. [2018-06-22 12:17:16,853 INFO ]: Abstraction has 48 states and 72 transitions. [2018-06-22 12:17:16,853 INFO ]: Interpolant automaton has 4 states. [2018-06-22 12:17:16,853 INFO ]: Start isEmpty. Operand 48 states and 72 transitions. [2018-06-22 12:17:16,855 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 12:17:16,855 INFO ]: Found error trace [2018-06-22 12:17:16,855 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 12:17:16,855 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:17:16,855 INFO ]: Analyzing trace with hash 1420929981, now seen corresponding path program 1 times [2018-06-22 12:17:16,855 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:17:16,855 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:17:16,864 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:17:16,864 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:17:16,864 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:17:16,889 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:17:17,310 WARN ]: Spent 349.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2018-06-22 12:17:17,519 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 12:17:17,519 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 12:17:17,519 INFO ]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-06-22 12:17:17,520 INFO ]: Interpolant automaton has 6 states [2018-06-22 12:17:17,520 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 12:17:17,520 INFO ]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-06-22 12:17:17,520 INFO ]: Start difference. First operand 48 states and 72 transitions. Second operand 6 states. [2018-06-22 12:17:17,729 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 12:17:17,729 INFO ]: Finished difference Result 54 states and 79 transitions. [2018-06-22 12:17:17,730 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 12:17:17,730 INFO ]: Start accepts. Automaton has 6 states. Word has length 21 [2018-06-22 12:17:17,730 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 12:17:17,732 INFO ]: With dead ends: 54 [2018-06-22 12:17:17,732 INFO ]: Without dead ends: 54 [2018-06-22 12:17:17,732 INFO ]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-06-22 12:17:17,732 INFO ]: Start minimizeSevpa. Operand 54 states. [2018-06-22 12:17:17,741 INFO ]: Finished minimizeSevpa. Reduced states from 54 to 48. [2018-06-22 12:17:17,741 INFO ]: Start removeUnreachable. Operand 48 states. [2018-06-22 12:17:17,743 INFO ]: Finished removeUnreachable. Reduced from 48 states to 48 states and 72 transitions. [2018-06-22 12:17:17,743 INFO ]: Start accepts. Automaton has 48 states and 72 transitions. Word has length 21 [2018-06-22 12:17:17,743 INFO ]: Finished accepts. word is rejected. [2018-06-22 12:17:17,743 INFO ]: Abstraction has 48 states and 72 transitions. [2018-06-22 12:17:17,743 INFO ]: Interpolant automaton has 6 states. [2018-06-22 12:17:17,743 INFO ]: Start isEmpty. Operand 48 states and 72 transitions. [2018-06-22 12:17:17,745 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 12:17:17,745 INFO ]: Found error trace [2018-06-22 12:17:17,745 INFO ]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 12:17:17,745 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:17:17,746 INFO ]: Analyzing trace with hash -1951621033, now seen corresponding path program 1 times [2018-06-22 12:17:17,746 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:17:17,746 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:17:17,747 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:17:17,747 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:17:17,747 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:17:17,767 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:17:17,908 INFO ]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-06-22 12:17:17,908 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 12:17:17,908 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-06-22 12:17:17,924 INFO ]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 12:17:17,971 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:17:17,977 INFO ]: Computing forward predicates... [2018-06-22 12:17:18,066 INFO ]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-06-22 12:17:18,086 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 12:17:18,086 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-06-22 12:17:18,086 INFO ]: Interpolant automaton has 7 states [2018-06-22 12:17:18,087 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-22 12:17:18,087 INFO ]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-06-22 12:17:18,087 INFO ]: Start difference. First operand 48 states and 72 transitions. Second operand 7 states. [2018-06-22 12:17:18,441 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 12:17:18,441 INFO ]: Finished difference Result 58 states and 83 transitions. [2018-06-22 12:17:18,441 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 12:17:18,441 INFO ]: Start accepts. Automaton has 7 states. Word has length 21 [2018-06-22 12:17:18,442 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 12:17:18,443 INFO ]: With dead ends: 58 [2018-06-22 12:17:18,443 INFO ]: Without dead ends: 36 [2018-06-22 12:17:18,443 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-06-22 12:17:18,443 INFO ]: Start minimizeSevpa. Operand 36 states. [2018-06-22 12:17:18,448 INFO ]: Finished minimizeSevpa. Reduced states from 36 to 34. [2018-06-22 12:17:18,448 INFO ]: Start removeUnreachable. Operand 34 states. [2018-06-22 12:17:18,449 INFO ]: Finished removeUnreachable. Reduced from 34 states to 34 states and 48 transitions. [2018-06-22 12:17:18,449 INFO ]: Start accepts. Automaton has 34 states and 48 transitions. Word has length 21 [2018-06-22 12:17:18,449 INFO ]: Finished accepts. word is rejected. [2018-06-22 12:17:18,449 INFO ]: Abstraction has 34 states and 48 transitions. [2018-06-22 12:17:18,449 INFO ]: Interpolant automaton has 7 states. [2018-06-22 12:17:18,449 INFO ]: Start isEmpty. Operand 34 states and 48 transitions. [2018-06-22 12:17:18,451 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 12:17:18,451 INFO ]: Found error trace [2018-06-22 12:17:18,451 INFO ]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 12:17:18,451 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:17:18,451 INFO ]: Analyzing trace with hash -63087738, now seen corresponding path program 1 times [2018-06-22 12:17:18,451 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:17:18,451 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:17:18,452 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:17:18,452 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:17:18,452 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:17:18,460 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:17:18,552 INFO ]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-06-22 12:17:18,552 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 12:17:18,552 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 12:17:18,552 INFO ]: Interpolant automaton has 4 states [2018-06-22 12:17:18,552 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 12:17:18,552 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 12:17:18,553 INFO ]: Start difference. First operand 34 states and 48 transitions. Second operand 4 states. [2018-06-22 12:17:18,703 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 12:17:18,703 INFO ]: Finished difference Result 34 states and 47 transitions. [2018-06-22 12:17:18,704 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 12:17:18,704 INFO ]: Start accepts. Automaton has 4 states. Word has length 21 [2018-06-22 12:17:18,704 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 12:17:18,705 INFO ]: With dead ends: 34 [2018-06-22 12:17:18,705 INFO ]: Without dead ends: 33 [2018-06-22 12:17:18,705 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 12:17:18,705 INFO ]: Start minimizeSevpa. Operand 33 states. [2018-06-22 12:17:18,710 INFO ]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-06-22 12:17:18,710 INFO ]: Start removeUnreachable. Operand 33 states. [2018-06-22 12:17:18,711 INFO ]: Finished removeUnreachable. Reduced from 33 states to 33 states and 45 transitions. [2018-06-22 12:17:18,711 INFO ]: Start accepts. Automaton has 33 states and 45 transitions. Word has length 21 [2018-06-22 12:17:18,711 INFO ]: Finished accepts. word is rejected. [2018-06-22 12:17:18,711 INFO ]: Abstraction has 33 states and 45 transitions. [2018-06-22 12:17:18,711 INFO ]: Interpolant automaton has 4 states. [2018-06-22 12:17:18,711 INFO ]: Start isEmpty. Operand 33 states and 45 transitions. [2018-06-22 12:17:18,712 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 12:17:18,712 INFO ]: Found error trace [2018-06-22 12:17:18,712 INFO ]: trace histogram [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] [2018-06-22 12:17:18,712 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:17:18,712 INFO ]: Analyzing trace with hash 1342565025, now seen corresponding path program 1 times [2018-06-22 12:17:18,712 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:17:18,712 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:17:18,713 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:17:18,713 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:17:18,713 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:17:18,731 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:17:18,943 INFO ]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-06-22 12:17:18,944 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 12:17:18,944 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) [2018-06-22 12:17:18,962 INFO ]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 12:17:18,989 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:17:18,993 INFO ]: Computing forward predicates... [2018-06-22 12:17:19,451 INFO ]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-06-22 12:17:19,475 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 12:17:19,476 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2018-06-22 12:17:19,476 INFO ]: Interpolant automaton has 14 states [2018-06-22 12:17:19,476 INFO ]: Constructing interpolant automaton starting with 14 interpolants. [2018-06-22 12:17:19,476 INFO ]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2018-06-22 12:17:19,476 INFO ]: Start difference. First operand 33 states and 45 transitions. Second operand 14 states. [2018-06-22 12:17:19,884 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 12:17:19,884 INFO ]: Finished difference Result 41 states and 55 transitions. [2018-06-22 12:17:19,884 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 12:17:19,885 INFO ]: Start accepts. Automaton has 14 states. Word has length 29 [2018-06-22 12:17:19,885 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 12:17:19,885 INFO ]: With dead ends: 41 [2018-06-22 12:17:19,885 INFO ]: Without dead ends: 41 [2018-06-22 12:17:19,886 INFO ]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2018-06-22 12:17:19,886 INFO ]: Start minimizeSevpa. Operand 41 states. [2018-06-22 12:17:19,893 INFO ]: Finished minimizeSevpa. Reduced states from 41 to 37. [2018-06-22 12:17:19,893 INFO ]: Start removeUnreachable. Operand 37 states. [2018-06-22 12:17:19,894 INFO ]: Finished removeUnreachable. Reduced from 37 states to 37 states and 49 transitions. [2018-06-22 12:17:19,894 INFO ]: Start accepts. Automaton has 37 states and 49 transitions. Word has length 29 [2018-06-22 12:17:19,895 INFO ]: Finished accepts. word is rejected. [2018-06-22 12:17:19,895 INFO ]: Abstraction has 37 states and 49 transitions. [2018-06-22 12:17:19,895 INFO ]: Interpolant automaton has 14 states. [2018-06-22 12:17:19,895 INFO ]: Start isEmpty. Operand 37 states and 49 transitions. [2018-06-22 12:17:19,896 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 12:17:19,896 INFO ]: Found error trace [2018-06-22 12:17:19,896 INFO ]: trace histogram [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] [2018-06-22 12:17:19,896 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:17:19,896 INFO ]: Analyzing trace with hash -1792513527, now seen corresponding path program 1 times [2018-06-22 12:17:19,896 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:17:19,896 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:17:19,897 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:17:19,897 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:17:19,897 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:17:19,909 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:17:19,968 INFO ]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-06-22 12:17:19,968 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 12:17:19,968 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 12:17:19,985 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:17:20,004 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:17:20,006 INFO ]: Computing forward predicates... [2018-06-22 12:17:20,037 INFO ]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-06-22 12:17:20,056 INFO ]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-06-22 12:17:20,056 INFO ]: Number of different interpolants: perfect sequences [6] imperfect sequences [4] total 7 [2018-06-22 12:17:20,056 INFO ]: Interpolant automaton has 7 states [2018-06-22 12:17:20,057 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-22 12:17:20,057 INFO ]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-06-22 12:17:20,057 INFO ]: Start difference. First operand 37 states and 49 transitions. Second operand 7 states. [2018-06-22 12:17:20,232 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 12:17:20,232 INFO ]: Finished difference Result 41 states and 54 transitions. [2018-06-22 12:17:20,233 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 12:17:20,233 INFO ]: Start accepts. Automaton has 7 states. Word has length 29 [2018-06-22 12:17:20,233 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 12:17:20,233 INFO ]: With dead ends: 41 [2018-06-22 12:17:20,233 INFO ]: Without dead ends: 41 [2018-06-22 12:17:20,234 INFO ]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-06-22 12:17:20,234 INFO ]: Start minimizeSevpa. Operand 41 states. [2018-06-22 12:17:20,239 INFO ]: Finished minimizeSevpa. Reduced states from 41 to 39. [2018-06-22 12:17:20,239 INFO ]: Start removeUnreachable. Operand 39 states. [2018-06-22 12:17:20,240 INFO ]: Finished removeUnreachable. Reduced from 39 states to 39 states and 52 transitions. [2018-06-22 12:17:20,240 INFO ]: Start accepts. Automaton has 39 states and 52 transitions. Word has length 29 [2018-06-22 12:17:20,240 INFO ]: Finished accepts. word is rejected. [2018-06-22 12:17:20,240 INFO ]: Abstraction has 39 states and 52 transitions. [2018-06-22 12:17:20,240 INFO ]: Interpolant automaton has 7 states. [2018-06-22 12:17:20,240 INFO ]: Start isEmpty. Operand 39 states and 52 transitions. [2018-06-22 12:17:20,241 INFO ]: Finished isEmpty. Found accepting run of length 46 [2018-06-22 12:17:20,241 INFO ]: Found error trace [2018-06-22 12:17:20,241 INFO ]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 12:17:20,241 INFO ]: === Iteration 9 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:17:20,241 INFO ]: Analyzing trace with hash 510565737, now seen corresponding path program 2 times [2018-06-22 12:17:20,241 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:17:20,241 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:17:20,242 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:17:20,242 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:17:20,242 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:17:20,268 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:17:20,553 INFO ]: Checked inductivity of 42 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-06-22 12:17:20,553 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 12:17:20,553 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 12:17:20,568 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 12:17:20,604 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 12:17:20,604 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:17:20,608 INFO ]: Computing forward predicates... [2018-06-22 12:17:21,242 INFO ]: Checked inductivity of 42 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-06-22 12:17:21,261 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 12:17:21,261 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2018-06-22 12:17:21,262 INFO ]: Interpolant automaton has 21 states [2018-06-22 12:17:21,262 INFO ]: Constructing interpolant automaton starting with 21 interpolants. [2018-06-22 12:17:21,262 INFO ]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2018-06-22 12:17:21,262 INFO ]: Start difference. First operand 39 states and 52 transitions. Second operand 21 states. [2018-06-22 12:17:22,433 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 12:17:22,433 INFO ]: Finished difference Result 60 states and 79 transitions. [2018-06-22 12:17:22,433 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-06-22 12:17:22,433 INFO ]: Start accepts. Automaton has 21 states. Word has length 45 [2018-06-22 12:17:22,433 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 12:17:22,434 INFO ]: With dead ends: 60 [2018-06-22 12:17:22,434 INFO ]: Without dead ends: 50 [2018-06-22 12:17:22,435 INFO ]: 0 DeclaredPredicates, 69 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=158, Invalid=964, Unknown=0, NotChecked=0, Total=1122 [2018-06-22 12:17:22,435 INFO ]: Start minimizeSevpa. Operand 50 states. [2018-06-22 12:17:22,446 INFO ]: Finished minimizeSevpa. Reduced states from 50 to 44. [2018-06-22 12:17:22,446 INFO ]: Start removeUnreachable. Operand 44 states. [2018-06-22 12:17:22,449 INFO ]: Finished removeUnreachable. Reduced from 44 states to 44 states and 61 transitions. [2018-06-22 12:17:22,449 INFO ]: Start accepts. Automaton has 44 states and 61 transitions. Word has length 45 [2018-06-22 12:17:22,450 INFO ]: Finished accepts. word is rejected. [2018-06-22 12:17:22,450 INFO ]: Abstraction has 44 states and 61 transitions. [2018-06-22 12:17:22,450 INFO ]: Interpolant automaton has 21 states. [2018-06-22 12:17:22,450 INFO ]: Start isEmpty. Operand 44 states and 61 transitions. [2018-06-22 12:17:22,451 INFO ]: Finished isEmpty. Found accepting run of length 46 [2018-06-22 12:17:22,451 INFO ]: Found error trace [2018-06-22 12:17:22,451 INFO ]: trace histogram [3, 3, 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] [2018-06-22 12:17:22,451 INFO ]: === Iteration 10 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:17:22,451 INFO ]: Analyzing trace with hash -1524744458, now seen corresponding path program 1 times [2018-06-22 12:17:22,451 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:17:22,451 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:17:22,452 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:17:22,452 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 12:17:22,452 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:17:22,479 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:17:22,536 INFO ]: Checked inductivity of 24 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-06-22 12:17:22,536 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 12:17:22,536 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) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 12:17:22,544 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:17:22,564 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:17:22,566 INFO ]: Computing forward predicates... [2018-06-22 12:17:22,605 INFO ]: Checked inductivity of 24 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-06-22 12:17:22,624 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 12:17:22,624 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2018-06-22 12:17:22,624 INFO ]: Interpolant automaton has 10 states [2018-06-22 12:17:22,624 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-22 12:17:22,624 INFO ]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2018-06-22 12:17:22,624 INFO ]: Start difference. First operand 44 states and 61 transitions. Second operand 10 states. [2018-06-22 12:17:22,730 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 12:17:22,730 INFO ]: Finished difference Result 52 states and 72 transitions. [2018-06-22 12:17:22,730 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 12:17:22,730 INFO ]: Start accepts. Automaton has 10 states. Word has length 45 [2018-06-22 12:17:22,730 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 12:17:22,731 INFO ]: With dead ends: 52 [2018-06-22 12:17:22,731 INFO ]: Without dead ends: 52 [2018-06-22 12:17:22,731 INFO ]: 0 DeclaredPredicates, 52 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2018-06-22 12:17:22,731 INFO ]: Start minimizeSevpa. Operand 52 states. [2018-06-22 12:17:22,736 INFO ]: Finished minimizeSevpa. Reduced states from 52 to 44. [2018-06-22 12:17:22,737 INFO ]: Start removeUnreachable. Operand 44 states. [2018-06-22 12:17:22,737 INFO ]: Finished removeUnreachable. Reduced from 44 states to 44 states and 61 transitions. [2018-06-22 12:17:22,737 INFO ]: Start accepts. Automaton has 44 states and 61 transitions. Word has length 45 [2018-06-22 12:17:22,738 INFO ]: Finished accepts. word is rejected. [2018-06-22 12:17:22,738 INFO ]: Abstraction has 44 states and 61 transitions. [2018-06-22 12:17:22,738 INFO ]: Interpolant automaton has 10 states. [2018-06-22 12:17:22,738 INFO ]: Start isEmpty. Operand 44 states and 61 transitions. [2018-06-22 12:17:22,739 INFO ]: Finished isEmpty. Found accepting run of length 58 [2018-06-22 12:17:22,739 INFO ]: Found error trace [2018-06-22 12:17:22,740 INFO ]: trace histogram [6, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 12:17:22,740 INFO ]: === Iteration 11 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:17:22,740 INFO ]: Analyzing trace with hash 477195537, now seen corresponding path program 1 times [2018-06-22 12:17:22,740 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:17:22,740 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:17:22,740 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:17:22,740 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:17:22,740 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:17:22,771 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:17:23,141 WARN ]: Spent 265.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2018-06-22 12:17:23,257 INFO ]: Checked inductivity of 87 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-06-22 12:17:23,257 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 12:17:23,257 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) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 12:17:23,262 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:17:23,303 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:17:23,309 INFO ]: Computing forward predicates... [2018-06-22 12:17:23,837 INFO ]: Checked inductivity of 87 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-06-22 12:17:23,857 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 12:17:23,857 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2018-06-22 12:17:23,857 INFO ]: Interpolant automaton has 21 states [2018-06-22 12:17:23,858 INFO ]: Constructing interpolant automaton starting with 21 interpolants. [2018-06-22 12:17:23,858 INFO ]: CoverageRelationStatistics Valid=42, Invalid=378, Unknown=0, NotChecked=0, Total=420 [2018-06-22 12:17:23,858 INFO ]: Start difference. First operand 44 states and 61 transitions. Second operand 21 states. [2018-06-22 12:17:24,630 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 12:17:24,630 INFO ]: Finished difference Result 52 states and 69 transitions. [2018-06-22 12:17:24,630 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-06-22 12:17:24,631 INFO ]: Start accepts. Automaton has 21 states. Word has length 57 [2018-06-22 12:17:24,631 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 12:17:24,631 INFO ]: With dead ends: 52 [2018-06-22 12:17:24,632 INFO ]: Without dead ends: 40 [2018-06-22 12:17:24,632 INFO ]: 0 DeclaredPredicates, 79 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2018-06-22 12:17:24,632 INFO ]: Start minimizeSevpa. Operand 40 states. [2018-06-22 12:17:24,636 INFO ]: Finished minimizeSevpa. Reduced states from 40 to 37. [2018-06-22 12:17:24,636 INFO ]: Start removeUnreachable. Operand 37 states. [2018-06-22 12:17:24,637 INFO ]: Finished removeUnreachable. Reduced from 37 states to 37 states and 49 transitions. [2018-06-22 12:17:24,637 INFO ]: Start accepts. Automaton has 37 states and 49 transitions. Word has length 57 [2018-06-22 12:17:24,637 INFO ]: Finished accepts. word is rejected. [2018-06-22 12:17:24,637 INFO ]: Abstraction has 37 states and 49 transitions. [2018-06-22 12:17:24,637 INFO ]: Interpolant automaton has 21 states. [2018-06-22 12:17:24,637 INFO ]: Start isEmpty. Operand 37 states and 49 transitions. [2018-06-22 12:17:24,638 INFO ]: Finished isEmpty. Found accepting run of length 50 [2018-06-22 12:17:24,638 INFO ]: Found error trace [2018-06-22 12:17:24,639 INFO ]: trace histogram [4, 4, 3, 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 12:17:24,639 INFO ]: === Iteration 12 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:17:24,640 INFO ]: Analyzing trace with hash -1454935605, now seen corresponding path program 1 times [2018-06-22 12:17:24,640 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:17:24,640 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:17:24,641 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:17:24,641 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:17:24,641 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:17:24,654 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:17:24,724 INFO ]: Checked inductivity of 35 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-06-22 12:17:24,724 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 12:17:24,724 INFO ]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-06-22 12:17:24,724 INFO ]: Interpolant automaton has 6 states [2018-06-22 12:17:24,724 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 12:17:24,724 INFO ]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-06-22 12:17:24,724 INFO ]: Start difference. First operand 37 states and 49 transitions. Second operand 6 states. [2018-06-22 12:17:24,760 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 12:17:24,760 INFO ]: Finished difference Result 33 states and 45 transitions. [2018-06-22 12:17:24,761 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 12:17:24,761 INFO ]: Start accepts. Automaton has 6 states. Word has length 49 [2018-06-22 12:17:24,761 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 12:17:24,761 INFO ]: With dead ends: 33 [2018-06-22 12:17:24,761 INFO ]: Without dead ends: 0 [2018-06-22 12:17:24,761 INFO ]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-06-22 12:17:24,761 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-22 12:17:24,762 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-22 12:17:24,762 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-22 12:17:24,762 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-22 12:17:24,762 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 49 [2018-06-22 12:17:24,762 INFO ]: Finished accepts. word is rejected. [2018-06-22 12:17:24,762 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-22 12:17:24,762 INFO ]: Interpolant automaton has 6 states. [2018-06-22 12:17:24,762 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-22 12:17:24,762 INFO ]: Finished isEmpty. No accepting run. [2018-06-22 12:17:24,765 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 12:17:24 BoogieIcfgContainer [2018-06-22 12:17:24,765 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 12:17:24,766 INFO ]: Toolchain (without parser) took 9221.23 ms. Allocated memory was 307.2 MB in the beginning and 411.0 MB in the end (delta: 103.8 MB). Free memory was 262.6 MB in the beginning and 385.3 MB in the end (delta: -122.7 MB). There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 12:17:24,767 INFO ]: SmtParser took 0.06 ms. Allocated memory is still 307.2 MB. Free memory is still 272.7 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 12:17:24,767 INFO ]: ChcToBoogie took 50.96 ms. Allocated memory is still 307.2 MB. Free memory was 261.6 MB in the beginning and 259.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 12:17:24,767 INFO ]: Boogie Preprocessor took 45.10 ms. Allocated memory is still 307.2 MB. Free memory was 259.6 MB in the beginning and 258.6 MB in the end (delta: 996.3 kB). Peak memory consumption was 996.3 kB. Max. memory is 3.6 GB. [2018-06-22 12:17:24,768 INFO ]: RCFGBuilder took 531.30 ms. Allocated memory is still 307.2 MB. Free memory was 258.6 MB in the beginning and 246.6 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 3.6 GB. [2018-06-22 12:17:24,768 INFO ]: TraceAbstraction took 8579.73 ms. Allocated memory was 307.2 MB in the beginning and 411.0 MB in the end (delta: 103.8 MB). Free memory was 245.6 MB in the beginning and 385.3 MB in the end (delta: -139.7 MB). There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 12:17:24,771 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 307.2 MB. Free memory is still 272.7 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 50.96 ms. Allocated memory is still 307.2 MB. Free memory was 261.6 MB in the beginning and 259.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 45.10 ms. Allocated memory is still 307.2 MB. Free memory was 259.6 MB in the beginning and 258.6 MB in the end (delta: 996.3 kB). Peak memory consumption was 996.3 kB. Max. memory is 3.6 GB. * RCFGBuilder took 531.30 ms. Allocated memory is still 307.2 MB. Free memory was 258.6 MB in the beginning and 246.6 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 8579.73 ms. Allocated memory was 307.2 MB in the beginning and 411.0 MB in the end (delta: 103.8 MB). Free memory was 245.6 MB in the beginning and 385.3 MB in the end (delta: -139.7 MB). There was no memory consumed. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [UNKNOWN] : assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 8 procedures, 47 locations, 1 error locations. SAFE Result, 8.5s OverallTime, 12 OverallIterations, 6 TraceHistogramMax, 3.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 609 SDtfs, 66 SDslu, 2797 SDs, 0 SdLazy, 901 SolverSat, 96 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 332 GetRequests, 213 SyntacticMatches, 3 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 4.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred in iteration=3, 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: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 33 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 3.9s InterpolantComputationTime, 574 NumberOfCodeBlocks, 574 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 556 ConstructedInterpolants, 0 QuantifiedInterpolants, 108108 SizeOfPredicates, 41 NumberOfNonLiveVariables, 820 ConjunctsInSsa, 191 ConjunctsInUnsatCore, 18 InterpolantComputations, 7 PerfectInterpolantSequences, 293/383 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/rec__limit2.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_12-17-24-782.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/rec__limit2.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_12-17-24-782.csv Received shutdown request...