java -Xss4m -Xmx4000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCHC_wBE.xml --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf -i /storage/chc-comp/vmt-chc-benchmarks/ctigar/nest-if8.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-62c3406-m [2018-06-26 21:44:16,225 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-26 21:44:16,228 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-26 21:44:16,242 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-26 21:44:16,243 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-26 21:44:16,243 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-26 21:44:16,244 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-26 21:44:16,248 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-26 21:44:16,250 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-26 21:44:16,250 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-26 21:44:16,253 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-26 21:44:16,253 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-26 21:44:16,254 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-26 21:44:16,255 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-26 21:44:16,258 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-26 21:44:16,259 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-26 21:44:16,262 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-26 21:44:16,264 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-26 21:44:16,265 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-26 21:44:16,279 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-26 21:44:16,280 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-26 21:44:16,281 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-26 21:44:16,283 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-26 21:44:16,283 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-26 21:44:16,284 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-26 21:44:16,284 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-26 21:44:16,285 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-26 21:44:16,286 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-26 21:44:16,287 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-26 21:44:16,293 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-26 21:44:16,293 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-26 21:44:16,294 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-26 21:44:16,294 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-06-26 21:44:16,294 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-26 21:44:16,295 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-26 21:44:16,295 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-26 21:44:16,296 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-26 21:44:16,319 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-26 21:44:16,319 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-26 21:44:16,319 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-26 21:44:16,319 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-26 21:44:16,320 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-26 21:44:16,320 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-26 21:44:16,320 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-26 21:44:16,321 INFO L133 SettingsManager]: * Use SBE=true [2018-06-26 21:44:16,323 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-26 21:44:16,324 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-26 21:44:16,324 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-26 21:44:16,324 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-26 21:44:16,324 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-26 21:44:16,324 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-26 21:44:16,324 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-26 21:44:16,325 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-26 21:44:16,325 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-26 21:44:16,325 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-26 21:44:16,325 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-26 21:44:16,325 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-26 21:44:16,325 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-26 21:44:16,328 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-26 21:44:16,328 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-26 21:44:16,377 INFO ]: Repository-Root is: /tmp [2018-06-26 21:44:16,393 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-26 21:44:16,399 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-26 21:44:16,400 INFO ]: Initializing SmtParser... [2018-06-26 21:44:16,400 INFO ]: SmtParser initialized [2018-06-26 21:44:16,401 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/nest-if8.c.smt2 [2018-06-26 21:44:16,402 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 [2018-06-26 21:44:16,488 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/nest-if8.c.smt2 unknown [2018-06-26 21:44:16,779 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/nest-if8.c.smt2 [2018-06-26 21:44:16,783 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-26 21:44:16,789 INFO ]: Walking toolchain with 5 elements. [2018-06-26 21:44:16,789 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-26 21:44:16,790 INFO ]: Initializing ChcToBoogie... [2018-06-26 21:44:16,790 INFO ]: ChcToBoogie initialized [2018-06-26 21:44:16,793 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 26.06 09:44:16" (1/1) ... [2018-06-26 21:44:16,846 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:44:16 Unit [2018-06-26 21:44:16,846 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-26 21:44:16,847 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-26 21:44:16,847 INFO ]: Initializing Boogie Preprocessor... [2018-06-26 21:44:16,847 INFO ]: Boogie Preprocessor initialized [2018-06-26 21:44:16,872 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:44:16" (1/1) ... [2018-06-26 21:44:16,872 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:44:16" (1/1) ... [2018-06-26 21:44:16,879 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:44:16" (1/1) ... [2018-06-26 21:44:16,879 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:44:16" (1/1) ... [2018-06-26 21:44:16,892 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:44:16" (1/1) ... [2018-06-26 21:44:16,894 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:44:16" (1/1) ... [2018-06-26 21:44:16,895 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:44:16" (1/1) ... [2018-06-26 21:44:16,897 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-26 21:44:16,898 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-26 21:44:16,898 INFO ]: Initializing RCFGBuilder... [2018-06-26 21:44:16,898 INFO ]: RCFGBuilder initialized [2018-06-26 21:44:16,899 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:44:16" (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) [2018-06-26 21:44:16,912 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-26 21:44:16,912 INFO ]: Found specification of procedure gotoProc [2018-06-26 21:44:16,912 INFO ]: Found implementation of procedure gotoProc [2018-06-26 21:44:16,912 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-26 21:44:16,912 INFO ]: Found specification of procedure Ultimate.START [2018-06-26 21:44:16,912 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 [2018-06-26 21:44:17,156 INFO ]: Using library mode [2018-06-26 21:44:17,157 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.06 09:44:17 BoogieIcfgContainer [2018-06-26 21:44:17,157 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-26 21:44:17,157 INFO ]: ------------------------BlockEncodingV2---------------------------- [2018-06-26 21:44:17,157 INFO ]: Initializing BlockEncodingV2... [2018-06-26 21:44:17,158 INFO ]: BlockEncodingV2 initialized [2018-06-26 21:44:17,158 INFO ]: Executing the observer BlockEncodingObserver from plugin BlockEncodingV2 for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.06 09:44:17" (1/1) ... [2018-06-26 21:44:17,190 INFO ]: Initial Icfg 10 locations, 10 edges [2018-06-26 21:44:17,192 INFO ]: Using Remove infeasible edges [2018-06-26 21:44:17,192 INFO ]: Using Maximize final states [2018-06-26 21:44:17,193 INFO ]: Using Minimize states even if more edges are added than removed.=false [2018-06-26 21:44:17,193 INFO ]: Using Minimize states using LBE with the strategy=MULTI [2018-06-26 21:44:17,195 INFO ]: Using Remove sink states [2018-06-26 21:44:17,196 INFO ]: Using Apply optimizations until nothing changes=true [2018-06-26 21:44:17,196 INFO ]: Using Use SBE [2018-06-26 21:44:17,200 WARN ]: expecting exponential blowup for input size 6 [2018-06-26 21:44:17,244 WARN ]: aborting because of expected exponential blowup for input size 41 [2018-06-26 21:44:17,254 WARN ]: aborting because of expected exponential blowup for input size 41 [2018-06-26 21:44:17,254 INFO ]: SBE split 1 edges [2018-06-26 21:44:17,259 INFO ]: Removed 2 edges and 2 locations because of local infeasibility [2018-06-26 21:44:17,261 INFO ]: 0 new accepting states [2018-06-26 21:44:17,346 INFO ]: Removed 6 edges and 2 locations by large block encoding [2018-06-26 21:44:17,347 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-26 21:44:17,348 INFO ]: Removed 0 edges and 0 locations because of local infeasibility [2018-06-26 21:44:17,349 INFO ]: 0 new accepting states [2018-06-26 21:44:17,349 INFO ]: Removed 0 edges and 0 locations by large block encoding [2018-06-26 21:44:17,349 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-26 21:44:17,349 INFO ]: Encoded RCFG 6 locations, 8 edges [2018-06-26 21:44:17,349 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 26.06 09:44:17 BasicIcfg [2018-06-26 21:44:17,349 INFO ]: ------------------------ END BlockEncodingV2---------------------------- [2018-06-26 21:44:17,356 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-26 21:44:17,356 INFO ]: Initializing TraceAbstraction... [2018-06-26 21:44:17,359 INFO ]: TraceAbstraction initialized [2018-06-26 21:44:17,359 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 26.06 09:44:16" (1/4) ... [2018-06-26 21:44:17,362 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a2ffb01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 26.06 09:44:17, skipping insertion in model container [2018-06-26 21:44:17,362 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:44:16" (2/4) ... [2018-06-26 21:44:17,362 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a2ffb01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.06 09:44:17, skipping insertion in model container [2018-06-26 21:44:17,362 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.06 09:44:17" (3/4) ... [2018-06-26 21:44:17,362 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a2ffb01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.06 09:44:17, skipping insertion in model container [2018-06-26 21:44:17,362 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 26.06 09:44:17" (4/4) ... [2018-06-26 21:44:17,364 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver_BEv2 [2018-06-26 21:44:17,374 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-26 21:44:17,381 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-26 21:44:17,413 INFO ]: Using default assertion order modulation [2018-06-26 21:44:17,413 INFO ]: Interprodecural is true [2018-06-26 21:44:17,413 INFO ]: Hoare is false [2018-06-26 21:44:17,413 INFO ]: Compute interpolants for FPandBP [2018-06-26 21:44:17,413 INFO ]: Backedges is TWOTRACK [2018-06-26 21:44:17,413 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-26 21:44:17,413 INFO ]: Difference is false [2018-06-26 21:44:17,413 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-26 21:44:17,413 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-26 21:44:17,425 INFO ]: Start isEmpty. Operand 6 states. [2018-06-26 21:44:17,438 INFO ]: Finished isEmpty. Found accepting run of length 6 [2018-06-26 21:44:17,438 INFO ]: Found error trace [2018-06-26 21:44:17,441 INFO ]: trace histogram [1, 1, 1, 1, 1] [2018-06-26 21:44:17,442 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 21:44:17,447 INFO ]: Analyzing trace with hash 35496740, now seen corresponding path program 1 times [2018-06-26 21:44:17,448 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 21:44:17,448 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 21:44:17,485 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:44:17,485 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 21:44:17,485 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:44:17,520 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:44:17,572 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 21:44:17,573 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-26 21:44:17,573 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-26 21:44:17,575 INFO ]: Interpolant automaton has 3 states [2018-06-26 21:44:17,584 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-26 21:44:17,585 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-26 21:44:17,586 INFO ]: Start difference. First operand 6 states. Second operand 3 states. [2018-06-26 21:44:17,649 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 21:44:17,649 INFO ]: Finished difference Result 7 states and 9 transitions. [2018-06-26 21:44:17,649 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-26 21:44:17,650 INFO ]: Start accepts. Automaton has 3 states. Word has length 5 [2018-06-26 21:44:17,651 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 21:44:17,659 INFO ]: With dead ends: 7 [2018-06-26 21:44:17,659 INFO ]: Without dead ends: 7 [2018-06-26 21:44:17,664 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-26 21:44:17,679 INFO ]: Start minimizeSevpa. Operand 7 states. [2018-06-26 21:44:17,693 INFO ]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-06-26 21:44:17,694 INFO ]: Start removeUnreachable. Operand 7 states. [2018-06-26 21:44:17,694 INFO ]: Finished removeUnreachable. Reduced from 7 states to 7 states and 9 transitions. [2018-06-26 21:44:17,696 INFO ]: Start accepts. Automaton has 7 states and 9 transitions. Word has length 5 [2018-06-26 21:44:17,696 INFO ]: Finished accepts. word is rejected. [2018-06-26 21:44:17,696 INFO ]: Abstraction has 7 states and 9 transitions. [2018-06-26 21:44:17,696 INFO ]: Interpolant automaton has 3 states. [2018-06-26 21:44:17,696 INFO ]: Start isEmpty. Operand 7 states and 9 transitions. [2018-06-26 21:44:17,696 INFO ]: Finished isEmpty. Found accepting run of length 7 [2018-06-26 21:44:17,696 INFO ]: Found error trace [2018-06-26 21:44:17,696 INFO ]: trace histogram [1, 1, 1, 1, 1, 1] [2018-06-26 21:44:17,696 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 21:44:17,697 INFO ]: Analyzing trace with hash 1099958961, now seen corresponding path program 1 times [2018-06-26 21:44:17,697 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 21:44:17,697 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 21:44:17,697 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:44:17,697 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 21:44:17,697 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:44:17,753 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:44:18,129 WARN ]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-26 21:44:18,130 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 21:44:18,130 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-26 21:44:18,130 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 [2018-06-26 21:44:18,136 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 21:44:18,181 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:44:18,190 INFO ]: Computing forward predicates... [2018-06-26 21:44:19,434 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 21:44:19,454 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-26 21:44:19,463 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-26 21:44:19,464 INFO ]: Interpolant automaton has 5 states [2018-06-26 21:44:19,464 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-26 21:44:19,464 INFO ]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-06-26 21:44:19,464 INFO ]: Start difference. First operand 7 states and 9 transitions. Second operand 5 states. [2018-06-26 21:44:19,576 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 21:44:19,576 INFO ]: Finished difference Result 10 states and 12 transitions. [2018-06-26 21:44:19,577 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-26 21:44:19,577 INFO ]: Start accepts. Automaton has 5 states. Word has length 6 [2018-06-26 21:44:19,577 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 21:44:19,577 INFO ]: With dead ends: 10 [2018-06-26 21:44:19,577 INFO ]: Without dead ends: 10 [2018-06-26 21:44:19,578 INFO ]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-06-26 21:44:19,578 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-26 21:44:19,579 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 8. [2018-06-26 21:44:19,579 INFO ]: Start removeUnreachable. Operand 8 states. [2018-06-26 21:44:19,580 INFO ]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2018-06-26 21:44:19,580 INFO ]: Start accepts. Automaton has 8 states and 10 transitions. Word has length 6 [2018-06-26 21:44:19,580 INFO ]: Finished accepts. word is rejected. [2018-06-26 21:44:19,580 INFO ]: Abstraction has 8 states and 10 transitions. [2018-06-26 21:44:19,580 INFO ]: Interpolant automaton has 5 states. [2018-06-26 21:44:19,580 INFO ]: Start isEmpty. Operand 8 states and 10 transitions. [2018-06-26 21:44:19,580 INFO ]: Finished isEmpty. Found accepting run of length 7 [2018-06-26 21:44:19,580 INFO ]: Found error trace [2018-06-26 21:44:19,580 INFO ]: trace histogram [1, 1, 1, 1, 1, 1] [2018-06-26 21:44:19,580 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 21:44:19,580 INFO ]: Analyzing trace with hash 1100882482, now seen corresponding path program 1 times [2018-06-26 21:44:19,580 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 21:44:19,580 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 21:44:19,582 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:44:19,582 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 21:44:19,582 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:44:19,628 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:44:19,790 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 21:44:19,790 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-26 21:44:19,790 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 [2018-06-26 21:44:19,802 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 21:44:19,838 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:44:19,840 INFO ]: Computing forward predicates... [2018-06-26 21:44:20,068 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 21:44:20,087 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-26 21:44:20,087 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-26 21:44:20,087 INFO ]: Interpolant automaton has 5 states [2018-06-26 21:44:20,087 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-26 21:44:20,087 INFO ]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-06-26 21:44:20,088 INFO ]: Start difference. First operand 8 states and 10 transitions. Second operand 5 states. [2018-06-26 21:44:20,295 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 21:44:20,295 INFO ]: Finished difference Result 11 states and 13 transitions. [2018-06-26 21:44:20,296 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-26 21:44:20,296 INFO ]: Start accepts. Automaton has 5 states. Word has length 6 [2018-06-26 21:44:20,296 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 21:44:20,296 INFO ]: With dead ends: 11 [2018-06-26 21:44:20,296 INFO ]: Without dead ends: 11 [2018-06-26 21:44:20,296 INFO ]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-06-26 21:44:20,297 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-26 21:44:20,297 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 8. [2018-06-26 21:44:20,297 INFO ]: Start removeUnreachable. Operand 8 states. [2018-06-26 21:44:20,298 INFO ]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2018-06-26 21:44:20,298 INFO ]: Start accepts. Automaton has 8 states and 10 transitions. Word has length 6 [2018-06-26 21:44:20,298 INFO ]: Finished accepts. word is rejected. [2018-06-26 21:44:20,298 INFO ]: Abstraction has 8 states and 10 transitions. [2018-06-26 21:44:20,298 INFO ]: Interpolant automaton has 5 states. [2018-06-26 21:44:20,298 INFO ]: Start isEmpty. Operand 8 states and 10 transitions. [2018-06-26 21:44:20,298 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-26 21:44:20,298 INFO ]: Found error trace [2018-06-26 21:44:20,298 INFO ]: trace histogram [2, 1, 1, 1, 1, 1] [2018-06-26 21:44:20,298 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 21:44:20,298 INFO ]: Analyzing trace with hash -261450556, now seen corresponding path program 2 times [2018-06-26 21:44:20,298 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 21:44:20,298 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 21:44:20,299 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:44:20,299 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 21:44:20,299 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:44:20,341 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:44:20,577 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 21:44:20,577 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-26 21:44:20,577 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 [2018-06-26 21:44:20,584 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-26 21:44:20,633 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-26 21:44:20,633 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:44:20,636 INFO ]: Computing forward predicates... [2018-06-26 21:44:21,193 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 21:44:21,212 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-26 21:44:21,212 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-06-26 21:44:21,213 INFO ]: Interpolant automaton has 5 states [2018-06-26 21:44:21,213 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-26 21:44:21,213 INFO ]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-06-26 21:44:21,213 INFO ]: Start difference. First operand 8 states and 10 transitions. Second operand 5 states. [2018-06-26 21:44:21,328 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 21:44:21,328 INFO ]: Finished difference Result 11 states and 13 transitions. [2018-06-26 21:44:21,328 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-26 21:44:21,328 INFO ]: Start accepts. Automaton has 5 states. Word has length 7 [2018-06-26 21:44:21,328 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 21:44:21,329 INFO ]: With dead ends: 11 [2018-06-26 21:44:21,329 INFO ]: Without dead ends: 11 [2018-06-26 21:44:21,329 INFO ]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-06-26 21:44:21,329 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-26 21:44:21,330 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 9. [2018-06-26 21:44:21,330 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-26 21:44:21,331 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2018-06-26 21:44:21,331 INFO ]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 7 [2018-06-26 21:44:21,331 INFO ]: Finished accepts. word is rejected. [2018-06-26 21:44:21,331 INFO ]: Abstraction has 9 states and 11 transitions. [2018-06-26 21:44:21,331 INFO ]: Interpolant automaton has 5 states. [2018-06-26 21:44:21,331 INFO ]: Start isEmpty. Operand 9 states and 11 transitions. [2018-06-26 21:44:21,331 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-26 21:44:21,331 INFO ]: Found error trace [2018-06-26 21:44:21,331 INFO ]: trace histogram [2, 1, 1, 1, 1, 1] [2018-06-26 21:44:21,331 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 21:44:21,331 INFO ]: Analyzing trace with hash -232821405, now seen corresponding path program 2 times [2018-06-26 21:44:21,331 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 21:44:21,331 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 21:44:21,332 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:44:21,332 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-26 21:44:21,332 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:44:21,356 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:44:21,460 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 21:44:21,460 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-26 21:44:21,460 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 [2018-06-26 21:44:21,466 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-26 21:44:21,526 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-26 21:44:21,526 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:44:21,528 INFO ]: Computing forward predicates... [2018-06-26 21:44:22,579 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 21:44:22,599 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-26 21:44:22,599 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-06-26 21:44:22,600 INFO ]: Interpolant automaton has 6 states [2018-06-26 21:44:22,600 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-26 21:44:22,600 INFO ]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-06-26 21:44:22,600 INFO ]: Start difference. First operand 9 states and 11 transitions. Second operand 6 states. [2018-06-26 21:44:22,655 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 21:44:22,655 INFO ]: Finished difference Result 12 states and 14 transitions. [2018-06-26 21:44:22,655 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-26 21:44:22,655 INFO ]: Start accepts. Automaton has 6 states. Word has length 7 [2018-06-26 21:44:22,655 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 21:44:22,656 INFO ]: With dead ends: 12 [2018-06-26 21:44:22,656 INFO ]: Without dead ends: 12 [2018-06-26 21:44:22,656 INFO ]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2018-06-26 21:44:22,656 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-26 21:44:22,657 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 9. [2018-06-26 21:44:22,657 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-26 21:44:22,658 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2018-06-26 21:44:22,658 INFO ]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 7 [2018-06-26 21:44:22,658 INFO ]: Finished accepts. word is rejected. [2018-06-26 21:44:22,658 INFO ]: Abstraction has 9 states and 11 transitions. [2018-06-26 21:44:22,658 INFO ]: Interpolant automaton has 6 states. [2018-06-26 21:44:22,658 INFO ]: Start isEmpty. Operand 9 states and 11 transitions. [2018-06-26 21:44:22,658 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-26 21:44:22,658 INFO ]: Found error trace [2018-06-26 21:44:22,658 INFO ]: trace histogram [3, 1, 1, 1, 1, 1] [2018-06-26 21:44:22,658 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 21:44:22,658 INFO ]: Analyzing trace with hash 484527377, now seen corresponding path program 3 times [2018-06-26 21:44:22,658 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 21:44:22,658 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 21:44:22,659 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:44:22,659 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-26 21:44:22,659 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:44:22,685 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:44:22,832 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 21:44:22,832 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-26 21:44:22,832 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 [2018-06-26 21:44:22,841 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-26 21:44:22,876 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-26 21:44:22,876 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:44:22,879 INFO ]: Computing forward predicates... [2018-06-26 21:45:13,326 WARN ]: expecting exponential blowup for input size 6 [2018-06-26 21:45:13,327 WARN ]: expecting exponential blowup for input size 6 [2018-06-26 21:45:13,339 WARN ]: expecting exponential blowup for input size 6 [2018-06-26 21:45:13,694 WARN ]: expecting exponential blowup for input size 7 [2018-06-26 21:45:13,699 WARN ]: expecting exponential blowup for input size 7 [2018-06-26 21:45:13,774 WARN ]: expecting exponential blowup for input size 6 [2018-06-26 21:45:13,979 WARN ]: expecting exponential blowup for input size 7 [2018-06-26 21:45:14,284 WARN ]: expecting exponential blowup for input size 6 [2018-06-26 21:45:14,323 WARN ]: expecting exponential blowup for input size 7 [2018-06-26 21:45:14,325 WARN ]: expecting exponential blowup for input size 7 [2018-06-26 21:45:14,495 WARN ]: expecting exponential blowup for input size 7 [2018-06-26 21:45:14,498 WARN ]: expecting exponential blowup for input size 11 [2018-06-26 21:45:14,515 WARN ]: expecting exponential blowup for input size 6 [2018-06-26 21:45:14,516 WARN ]: expecting exponential blowup for input size 6 [2018-06-26 21:45:14,767 WARN ]: expecting exponential blowup for input size 6 [2018-06-26 21:45:14,768 WARN ]: expecting exponential blowup for input size 6 [2018-06-26 21:45:14,790 WARN ]: expecting exponential blowup for input size 6 [2018-06-26 21:45:14,791 WARN ]: expecting exponential blowup for input size 6 Received shutdown request... [2018-06-26 21:45:22,894 INFO ]: Timeout while computing interpolants [2018-06-26 21:45:23,095 WARN ]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-26 21:45:23,095 WARN ]: Verification canceled [2018-06-26 21:45:23,097 INFO ]: Did not count any witness invariants because Icfg is not BoogieIcfg [2018-06-26 21:45:23,098 WARN ]: Timeout [2018-06-26 21:45:23,098 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.06 09:45:23 BasicIcfg [2018-06-26 21:45:23,098 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-26 21:45:23,099 INFO ]: Toolchain (without parser) took 66314.74 ms. Allocated memory was 309.3 MB in the beginning and 1.6 GB in the end (delta: 1.3 GB). Free memory was 259.7 MB in the beginning and 848.8 MB in the end (delta: -589.1 MB). Peak memory consumption was 1.4 GB. Max. memory is 3.6 GB. [2018-06-26 21:45:23,100 INFO ]: SmtParser took 0.07 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. [2018-06-26 21:45:23,100 INFO ]: ChcToBoogie took 57.06 ms. Allocated memory is still 309.3 MB. Free memory was 259.7 MB in the beginning and 257.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-26 21:45:23,100 INFO ]: Boogie Preprocessor took 50.61 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. [2018-06-26 21:45:23,101 INFO ]: RCFGBuilder took 258.90 ms. Allocated memory is still 309.3 MB. Free memory was 255.7 MB in the beginning and 244.6 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 3.6 GB. [2018-06-26 21:45:23,101 INFO ]: BlockEncodingV2 took 192.17 ms. Allocated memory is still 309.3 MB. Free memory was 244.6 MB in the beginning and 238.6 MB in the end (delta: 6.0 MB). Peak memory consumption was 6.0 MB. Max. memory is 3.6 GB. [2018-06-26 21:45:23,102 INFO ]: TraceAbstraction took 65742.04 ms. Allocated memory was 309.3 MB in the beginning and 1.6 GB in the end (delta: 1.3 GB). Free memory was 238.6 MB in the beginning and 848.8 MB in the end (delta: -610.2 MB). Peak memory consumption was 1.4 GB. Max. memory is 3.6 GB. [2018-06-26 21:45:23,106 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.plugins.blockencoding: - StatisticsResult: Initial Icfg 10 locations, 10 edges - StatisticsResult: Encoded RCFG 6 locations, 8 edges * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.07 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 57.06 ms. Allocated memory is still 309.3 MB. Free memory was 259.7 MB in the beginning and 257.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 50.61 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. * RCFGBuilder took 258.90 ms. Allocated memory is still 309.3 MB. Free memory was 255.7 MB in the beginning and 244.6 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 3.6 GB. * BlockEncodingV2 took 192.17 ms. Allocated memory is still 309.3 MB. Free memory was 244.6 MB in the beginning and 238.6 MB in the end (delta: 6.0 MB). Peak memory consumption was 6.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 65742.04 ms. Allocated memory was 309.3 MB in the beginning and 1.6 GB in the end (delta: 1.3 GB). Free memory was 238.6 MB in the beginning and 848.8 MB in the end (delta: -610.2 MB). Peak memory consumption was 1.4 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 Cancelled while BasicCegarLoop was analyzing trace of length 9 with TraceHistMax 3, while TraceCheckSpWp was constructing forward predicates, while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations, while XnfDer was eliminating 35263 quantified variables from 15 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 6 locations, 1 error locations. TIMEOUT Result, 65.6s OverallTime, 6 OverallIterations, 3 TraceHistogramMax, 0.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 35 SDtfs, 0 SDslu, 36 SDs, 0 SdLazy, 36 SolverSat, 27 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=9occurred in iteration=4, 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: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 10 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 4.0s InterpolantComputationTime, 57 NumberOfCodeBlocks, 57 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 48 ConstructedInterpolants, 0 QuantifiedInterpolants, 710 SizeOfPredicates, 20 NumberOfNonLiveVariables, 506 ConjunctsInSsa, 68 ConjunctsInUnsatCore, 9 InterpolantComputations, 1 PerfectInterpolantSequences, 0/16 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/nest-if8.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-GraphSizeCsvProvider-0-2018-06-26_21-45-23-119.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/nest-if8.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-GraphSizeCsvProvider-1-2018-06-26_21-45-23-119.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/nest-if8.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-Benchmark-0-2018-06-26_21-45-23-119.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/nest-if8.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-26_21-45-23-119.csv Completed graceful shutdown