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/lifo.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-14921ce [2018-06-25 01:05:59,221 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-25 01:05:59,223 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-25 01:05:59,242 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-25 01:05:59,242 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-25 01:05:59,243 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-25 01:05:59,247 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-25 01:05:59,249 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-25 01:05:59,251 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-25 01:05:59,253 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-25 01:05:59,254 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-25 01:05:59,254 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-25 01:05:59,255 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-25 01:05:59,256 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-25 01:05:59,257 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-25 01:05:59,258 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-25 01:05:59,260 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-25 01:05:59,266 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-25 01:05:59,278 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-25 01:05:59,280 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-25 01:05:59,281 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-25 01:05:59,283 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-25 01:05:59,283 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-25 01:05:59,284 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-25 01:05:59,284 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-25 01:05:59,285 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-25 01:05:59,290 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-25 01:05:59,291 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-25 01:05:59,292 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-25 01:05:59,293 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-25 01:05:59,293 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-25 01:05:59,299 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-25 01:05:59,299 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-25 01:05:59,300 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-25 01:05:59,300 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-25 01:05:59,301 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-25 01:05:59,325 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-25 01:05:59,325 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-25 01:05:59,326 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-25 01:05:59,328 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-25 01:05:59,329 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-25 01:05:59,329 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-25 01:05:59,329 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-25 01:05:59,330 INFO L133 SettingsManager]: * Use SBE=true [2018-06-25 01:05:59,330 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-25 01:05:59,330 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-25 01:05:59,330 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-25 01:05:59,330 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-25 01:05:59,331 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-25 01:05:59,332 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-25 01:05:59,332 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-25 01:05:59,332 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-25 01:05:59,332 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-25 01:05:59,332 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-25 01:05:59,333 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-25 01:05:59,333 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-25 01:05:59,333 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-25 01:05:59,334 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-25 01:05:59,335 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-25 01:05:59,393 INFO ]: Repository-Root is: /tmp [2018-06-25 01:05:59,411 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-25 01:05:59,418 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-25 01:05:59,420 INFO ]: Initializing SmtParser... [2018-06-25 01:05:59,421 INFO ]: SmtParser initialized [2018-06-25 01:05:59,421 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/lifo.c.smt2 [2018-06-25 01:05:59,423 INFO ]: Parsing .smt2 file as a set of Horn Clauses No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-06-25 01:05:59,513 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/lifo.c.smt2 unknown [2018-06-25 01:06:00,027 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/lifo.c.smt2 [2018-06-25 01:06:00,032 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-25 01:06:00,040 INFO ]: Walking toolchain with 5 elements. [2018-06-25 01:06:00,041 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-25 01:06:00,041 INFO ]: Initializing ChcToBoogie... [2018-06-25 01:06:00,041 INFO ]: ChcToBoogie initialized [2018-06-25 01:06:00,044 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 01:06:00" (1/1) ... [2018-06-25 01:06:00,114 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:06:00 Unit [2018-06-25 01:06:00,115 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-25 01:06:00,115 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-25 01:06:00,115 INFO ]: Initializing Boogie Preprocessor... [2018-06-25 01:06:00,115 INFO ]: Boogie Preprocessor initialized [2018-06-25 01:06:00,139 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:06:00" (1/1) ... [2018-06-25 01:06:00,139 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:06:00" (1/1) ... [2018-06-25 01:06:00,163 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:06:00" (1/1) ... [2018-06-25 01:06:00,163 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:06:00" (1/1) ... [2018-06-25 01:06:00,186 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:06:00" (1/1) ... [2018-06-25 01:06:00,188 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:06:00" (1/1) ... [2018-06-25 01:06:00,193 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:06:00" (1/1) ... [2018-06-25 01:06:00,198 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-25 01:06:00,199 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-25 01:06:00,199 INFO ]: Initializing RCFGBuilder... [2018-06-25 01:06:00,199 INFO ]: RCFGBuilder initialized [2018-06-25 01:06:00,200 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:06:00" (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) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-25 01:06:00,214 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-25 01:06:00,214 INFO ]: Found specification of procedure gotoProc [2018-06-25 01:06:00,214 INFO ]: Found implementation of procedure gotoProc [2018-06-25 01:06:00,214 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-25 01:06:00,214 INFO ]: Found specification of procedure Ultimate.START [2018-06-25 01:06:00,214 INFO ]: Found implementation of procedure Ultimate.START [2018-06-25 01:06:00,600 INFO ]: Using library mode [2018-06-25 01:06:00,600 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 01:06:00 BoogieIcfgContainer [2018-06-25 01:06:00,601 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-25 01:06:00,601 INFO ]: ------------------------BlockEncodingV2---------------------------- [2018-06-25 01:06:00,601 INFO ]: Initializing BlockEncodingV2... [2018-06-25 01:06:00,602 INFO ]: BlockEncodingV2 initialized [2018-06-25 01:06:00,603 INFO ]: Executing the observer BlockEncodingObserver from plugin BlockEncodingV2 for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 01:06:00" (1/1) ... [2018-06-25 01:06:00,626 INFO ]: Initial Icfg 10 locations, 10 edges [2018-06-25 01:06:00,627 INFO ]: Using Remove infeasible edges [2018-06-25 01:06:00,628 INFO ]: Using Maximize final states [2018-06-25 01:06:00,629 INFO ]: Using Minimize states even if more edges are added than removed.=false [2018-06-25 01:06:00,629 INFO ]: Using Minimize states using LBE with the strategy=MULTI [2018-06-25 01:06:00,633 INFO ]: Using Remove sink states [2018-06-25 01:06:00,634 INFO ]: Using Apply optimizations until nothing changes=true [2018-06-25 01:06:00,634 INFO ]: Using Use SBE [2018-06-25 01:06:00,640 WARN ]: expecting exponential blowup for input size 8 [2018-06-25 01:06:00,837 WARN ]: aborting because of expected exponential blowup for input size 140 [2018-06-25 01:06:00,869 WARN ]: aborting because of expected exponential blowup for input size 140 [2018-06-25 01:06:00,871 INFO ]: SBE split 1 edges [2018-06-25 01:06:00,878 INFO ]: Removed 2 edges and 2 locations because of local infeasibility [2018-06-25 01:06:00,881 INFO ]: 0 new accepting states [2018-06-25 01:06:01,034 INFO ]: Removed 9 edges and 2 locations by large block encoding [2018-06-25 01:06:01,036 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-25 01:06:01,038 INFO ]: Removed 0 edges and 0 locations because of local infeasibility [2018-06-25 01:06:01,038 INFO ]: 0 new accepting states [2018-06-25 01:06:01,038 INFO ]: Removed 0 edges and 0 locations by large block encoding [2018-06-25 01:06:01,039 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-25 01:06:01,039 INFO ]: Encoded RCFG 6 locations, 11 edges [2018-06-25 01:06:01,039 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 25.06 01:06:01 BasicIcfg [2018-06-25 01:06:01,039 INFO ]: ------------------------ END BlockEncodingV2---------------------------- [2018-06-25 01:06:01,040 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-25 01:06:01,040 INFO ]: Initializing TraceAbstraction... [2018-06-25 01:06:01,045 INFO ]: TraceAbstraction initialized [2018-06-25 01:06:01,045 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 01:06:00" (1/4) ... [2018-06-25 01:06:01,046 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6743b9e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 25.06 01:06:01, skipping insertion in model container [2018-06-25 01:06:01,046 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:06:00" (2/4) ... [2018-06-25 01:06:01,046 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6743b9e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.06 01:06:01, skipping insertion in model container [2018-06-25 01:06:01,046 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 01:06:00" (3/4) ... [2018-06-25 01:06:01,046 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6743b9e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.06 01:06:01, skipping insertion in model container [2018-06-25 01:06:01,046 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 25.06 01:06:01" (4/4) ... [2018-06-25 01:06:01,049 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver_BEv2 [2018-06-25 01:06:01,059 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-25 01:06:01,068 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-25 01:06:01,128 INFO ]: Using default assertion order modulation [2018-06-25 01:06:01,129 INFO ]: Interprodecural is true [2018-06-25 01:06:01,129 INFO ]: Hoare is false [2018-06-25 01:06:01,129 INFO ]: Compute interpolants for FPandBP [2018-06-25 01:06:01,129 INFO ]: Backedges is TWOTRACK [2018-06-25 01:06:01,129 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-25 01:06:01,129 INFO ]: Difference is false [2018-06-25 01:06:01,129 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-25 01:06:01,129 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-25 01:06:01,143 INFO ]: Start isEmpty. Operand 6 states. [2018-06-25 01:06:01,156 INFO ]: Finished isEmpty. Found accepting run of length 6 [2018-06-25 01:06:01,156 INFO ]: Found error trace [2018-06-25 01:06:01,157 INFO ]: trace histogram [1, 1, 1, 1, 1] [2018-06-25 01:06:01,157 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 01:06:01,163 INFO ]: Analyzing trace with hash 35591879, now seen corresponding path program 1 times [2018-06-25 01:06:01,165 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 01:06:01,166 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 01:06:01,214 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:06:01,215 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 01:06:01,215 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:06:01,258 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:06:01,359 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:06:01,362 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-25 01:06:01,362 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-25 01:06:01,364 INFO ]: Interpolant automaton has 3 states [2018-06-25 01:06:01,379 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-25 01:06:01,380 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 01:06:01,382 INFO ]: Start difference. First operand 6 states. Second operand 3 states. [2018-06-25 01:06:01,541 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 01:06:01,541 INFO ]: Finished difference Result 7 states and 12 transitions. [2018-06-25 01:06:01,542 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-25 01:06:01,543 INFO ]: Start accepts. Automaton has 3 states. Word has length 5 [2018-06-25 01:06:01,543 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 01:06:01,554 INFO ]: With dead ends: 7 [2018-06-25 01:06:01,554 INFO ]: Without dead ends: 7 [2018-06-25 01:06:01,559 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 01:06:01,584 INFO ]: Start minimizeSevpa. Operand 7 states. [2018-06-25 01:06:01,609 INFO ]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-06-25 01:06:01,611 INFO ]: Start removeUnreachable. Operand 7 states. [2018-06-25 01:06:01,611 INFO ]: Finished removeUnreachable. Reduced from 7 states to 7 states and 12 transitions. [2018-06-25 01:06:01,613 INFO ]: Start accepts. Automaton has 7 states and 12 transitions. Word has length 5 [2018-06-25 01:06:01,613 INFO ]: Finished accepts. word is rejected. [2018-06-25 01:06:01,614 INFO ]: Abstraction has 7 states and 12 transitions. [2018-06-25 01:06:01,614 INFO ]: Interpolant automaton has 3 states. [2018-06-25 01:06:01,614 INFO ]: Start isEmpty. Operand 7 states and 12 transitions. [2018-06-25 01:06:01,614 INFO ]: Finished isEmpty. Found accepting run of length 6 [2018-06-25 01:06:01,614 INFO ]: Found error trace [2018-06-25 01:06:01,614 INFO ]: trace histogram [1, 1, 1, 1, 1] [2018-06-25 01:06:01,614 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 01:06:01,614 INFO ]: Analyzing trace with hash 35651461, now seen corresponding path program 1 times [2018-06-25 01:06:01,614 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 01:06:01,614 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 01:06:01,616 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:06:01,616 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 01:06:01,617 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:06:01,625 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:06:01,686 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:06:01,686 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-25 01:06:01,686 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-25 01:06:01,687 INFO ]: Interpolant automaton has 3 states [2018-06-25 01:06:01,687 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-25 01:06:01,687 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 01:06:01,688 INFO ]: Start difference. First operand 7 states and 12 transitions. Second operand 3 states. [2018-06-25 01:06:01,823 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 01:06:01,824 INFO ]: Finished difference Result 8 states and 13 transitions. [2018-06-25 01:06:01,824 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-25 01:06:01,824 INFO ]: Start accepts. Automaton has 3 states. Word has length 5 [2018-06-25 01:06:01,825 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 01:06:01,825 INFO ]: With dead ends: 8 [2018-06-25 01:06:01,825 INFO ]: Without dead ends: 8 [2018-06-25 01:06:01,826 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 01:06:01,826 INFO ]: Start minimizeSevpa. Operand 8 states. [2018-06-25 01:06:01,827 INFO ]: Finished minimizeSevpa. Reduced states from 8 to 7. [2018-06-25 01:06:01,827 INFO ]: Start removeUnreachable. Operand 7 states. [2018-06-25 01:06:01,828 INFO ]: Finished removeUnreachable. Reduced from 7 states to 7 states and 12 transitions. [2018-06-25 01:06:01,828 INFO ]: Start accepts. Automaton has 7 states and 12 transitions. Word has length 5 [2018-06-25 01:06:01,828 INFO ]: Finished accepts. word is rejected. [2018-06-25 01:06:01,828 INFO ]: Abstraction has 7 states and 12 transitions. [2018-06-25 01:06:01,828 INFO ]: Interpolant automaton has 3 states. [2018-06-25 01:06:01,828 INFO ]: Start isEmpty. Operand 7 states and 12 transitions. [2018-06-25 01:06:01,828 INFO ]: Finished isEmpty. Found accepting run of length 7 [2018-06-25 01:06:01,828 INFO ]: Found error trace [2018-06-25 01:06:01,828 INFO ]: trace histogram [1, 1, 1, 1, 1, 1] [2018-06-25 01:06:01,828 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 01:06:01,830 INFO ]: Analyzing trace with hash 1102735290, now seen corresponding path program 1 times [2018-06-25 01:06:01,830 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 01:06:01,830 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 01:06:01,831 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:06:01,831 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 01:06:01,831 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:06:01,971 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:06:02,343 WARN ]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-06-25 01:06:02,344 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:06:02,344 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 01:06:02,344 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 01:06:02,355 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 01:06:02,457 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:06:02,467 INFO ]: Computing forward predicates... [2018-06-25 01:06:04,534 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:06:04,567 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 01:06:04,567 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-06-25 01:06:04,567 INFO ]: Interpolant automaton has 4 states [2018-06-25 01:06:04,567 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-25 01:06:04,568 INFO ]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-06-25 01:06:04,568 INFO ]: Start difference. First operand 7 states and 12 transitions. Second operand 4 states. [2018-06-25 01:06:04,753 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 01:06:04,753 INFO ]: Finished difference Result 9 states and 14 transitions. [2018-06-25 01:06:04,754 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-25 01:06:04,754 INFO ]: Start accepts. Automaton has 4 states. Word has length 6 [2018-06-25 01:06:04,754 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 01:06:04,754 INFO ]: With dead ends: 9 [2018-06-25 01:06:04,754 INFO ]: Without dead ends: 9 [2018-06-25 01:06:04,755 INFO ]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-06-25 01:06:04,755 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-25 01:06:04,756 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 8. [2018-06-25 01:06:04,756 INFO ]: Start removeUnreachable. Operand 8 states. [2018-06-25 01:06:04,756 INFO ]: Finished removeUnreachable. Reduced from 8 states to 8 states and 13 transitions. [2018-06-25 01:06:04,756 INFO ]: Start accepts. Automaton has 8 states and 13 transitions. Word has length 6 [2018-06-25 01:06:04,756 INFO ]: Finished accepts. word is rejected. [2018-06-25 01:06:04,756 INFO ]: Abstraction has 8 states and 13 transitions. [2018-06-25 01:06:04,756 INFO ]: Interpolant automaton has 4 states. [2018-06-25 01:06:04,756 INFO ]: Start isEmpty. Operand 8 states and 13 transitions. [2018-06-25 01:06:04,757 INFO ]: Finished isEmpty. Found accepting run of length 7 [2018-06-25 01:06:04,757 INFO ]: Found error trace [2018-06-25 01:06:04,757 INFO ]: trace histogram [1, 1, 1, 1, 1, 1] [2018-06-25 01:06:04,757 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 01:06:04,757 INFO ]: Analyzing trace with hash 1105505853, now seen corresponding path program 1 times [2018-06-25 01:06:04,757 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 01:06:04,757 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 01:06:04,758 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:06:04,758 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 01:06:04,758 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:06:04,799 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:06:05,094 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:06:05,094 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 01:06:05,094 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 01:06:05,102 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 01:06:05,178 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:06:05,181 INFO ]: Computing forward predicates... [2018-06-25 01:06:05,394 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 01:06:06,979 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:06:06,999 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 01:06:06,999 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-25 01:06:06,999 INFO ]: Interpolant automaton has 5 states [2018-06-25 01:06:06,999 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-25 01:06:06,999 INFO ]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-06-25 01:06:07,000 INFO ]: Start difference. First operand 8 states and 13 transitions. Second operand 5 states. [2018-06-25 01:06:07,060 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 01:06:07,061 INFO ]: Finished difference Result 12 states and 17 transitions. [2018-06-25 01:06:07,061 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-25 01:06:07,061 INFO ]: Start accepts. Automaton has 5 states. Word has length 6 [2018-06-25 01:06:07,061 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 01:06:07,061 INFO ]: With dead ends: 12 [2018-06-25 01:06:07,061 INFO ]: Without dead ends: 12 [2018-06-25 01:06:07,062 INFO ]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-06-25 01:06:07,062 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-25 01:06:07,063 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 8. [2018-06-25 01:06:07,063 INFO ]: Start removeUnreachable. Operand 8 states. [2018-06-25 01:06:07,063 INFO ]: Finished removeUnreachable. Reduced from 8 states to 8 states and 13 transitions. [2018-06-25 01:06:07,063 INFO ]: Start accepts. Automaton has 8 states and 13 transitions. Word has length 6 [2018-06-25 01:06:07,063 INFO ]: Finished accepts. word is rejected. [2018-06-25 01:06:07,063 INFO ]: Abstraction has 8 states and 13 transitions. [2018-06-25 01:06:07,063 INFO ]: Interpolant automaton has 5 states. [2018-06-25 01:06:07,063 INFO ]: Start isEmpty. Operand 8 states and 13 transitions. [2018-06-25 01:06:07,064 INFO ]: Finished isEmpty. Found accepting run of length 7 [2018-06-25 01:06:07,064 INFO ]: Found error trace [2018-06-25 01:06:07,064 INFO ]: trace histogram [1, 1, 1, 1, 1, 1] [2018-06-25 01:06:07,064 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 01:06:07,064 INFO ]: Analyzing trace with hash 1107352895, now seen corresponding path program 1 times [2018-06-25 01:06:07,064 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 01:06:07,064 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 01:06:07,065 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:06:07,065 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 01:06:07,065 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:06:07,093 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:06:07,284 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:06:07,284 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 01:06:07,284 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 01:06:07,290 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 01:06:07,338 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:06:07,341 INFO ]: Computing forward predicates... [2018-06-25 01:06:07,495 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 01:06:08,429 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:06:08,452 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 01:06:08,452 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-25 01:06:08,452 INFO ]: Interpolant automaton has 5 states [2018-06-25 01:06:08,453 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-25 01:06:08,453 INFO ]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-06-25 01:06:08,453 INFO ]: Start difference. First operand 8 states and 13 transitions. Second operand 5 states. [2018-06-25 01:06:08,490 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 01:06:08,490 INFO ]: Finished difference Result 13 states and 18 transitions. [2018-06-25 01:06:08,490 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-25 01:06:08,490 INFO ]: Start accepts. Automaton has 5 states. Word has length 6 [2018-06-25 01:06:08,491 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 01:06:08,491 INFO ]: With dead ends: 13 [2018-06-25 01:06:08,491 INFO ]: Without dead ends: 13 [2018-06-25 01:06:08,491 INFO ]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-06-25 01:06:08,491 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-25 01:06:08,492 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 9. [2018-06-25 01:06:08,492 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-25 01:06:08,493 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 14 transitions. [2018-06-25 01:06:08,493 INFO ]: Start accepts. Automaton has 9 states and 14 transitions. Word has length 6 [2018-06-25 01:06:08,493 INFO ]: Finished accepts. word is rejected. [2018-06-25 01:06:08,493 INFO ]: Abstraction has 9 states and 14 transitions. [2018-06-25 01:06:08,493 INFO ]: Interpolant automaton has 5 states. [2018-06-25 01:06:08,493 INFO ]: Start isEmpty. Operand 9 states and 14 transitions. [2018-06-25 01:06:08,493 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-25 01:06:08,493 INFO ]: Found error trace [2018-06-25 01:06:08,493 INFO ]: trace histogram [2, 1, 1, 1, 1, 1] [2018-06-25 01:06:08,493 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 01:06:08,493 INFO ]: Analyzing trace with hash -175557337, now seen corresponding path program 2 times [2018-06-25 01:06:08,493 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 01:06:08,493 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 01:06:08,494 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:06:08,494 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 01:06:08,494 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:06:08,551 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:06:08,743 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:06:08,743 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 01:06:08,743 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 [2018-06-25 01:06:08,750 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-25 01:06:08,855 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-25 01:06:08,855 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:06:08,858 INFO ]: Computing forward predicates... [2018-06-25 01:06:14,014 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:06:14,034 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 01:06:14,034 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-06-25 01:06:14,034 INFO ]: Interpolant automaton has 6 states [2018-06-25 01:06:14,035 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-25 01:06:14,035 INFO ]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-06-25 01:06:14,035 INFO ]: Start difference. First operand 9 states and 14 transitions. Second operand 6 states. [2018-06-25 01:06:14,134 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 01:06:14,134 INFO ]: Finished difference Result 13 states and 18 transitions. [2018-06-25 01:06:14,134 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-25 01:06:14,134 INFO ]: Start accepts. Automaton has 6 states. Word has length 7 [2018-06-25 01:06:14,135 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 01:06:14,135 INFO ]: With dead ends: 13 [2018-06-25 01:06:14,135 INFO ]: Without dead ends: 13 [2018-06-25 01:06:14,135 INFO ]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-06-25 01:06:14,135 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-25 01:06:14,136 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 9. [2018-06-25 01:06:14,136 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-25 01:06:14,137 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 14 transitions. [2018-06-25 01:06:14,137 INFO ]: Start accepts. Automaton has 9 states and 14 transitions. Word has length 7 [2018-06-25 01:06:14,137 INFO ]: Finished accepts. word is rejected. [2018-06-25 01:06:14,137 INFO ]: Abstraction has 9 states and 14 transitions. [2018-06-25 01:06:14,137 INFO ]: Interpolant automaton has 6 states. [2018-06-25 01:06:14,137 INFO ]: Start isEmpty. Operand 9 states and 14 transitions. [2018-06-25 01:06:14,137 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-25 01:06:14,137 INFO ]: Found error trace [2018-06-25 01:06:14,137 INFO ]: trace histogram [3, 1, 1, 1, 1, 1] [2018-06-25 01:06:14,137 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 01:06:14,138 INFO ]: Analyzing trace with hash -1147923110, now seen corresponding path program 3 times [2018-06-25 01:06:14,138 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 01:06:14,138 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 01:06:14,138 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:06:14,138 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 01:06:14,138 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:06:14,216 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:06:14,547 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:06:14,547 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 01:06:14,578 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 [2018-06-25 01:06:14,606 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-25 01:06:14,725 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-25 01:06:14,725 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:06:14,729 INFO ]: Computing forward predicates... Received shutdown request... [2018-06-25 01:07:07,122 INFO ]: Timeout while computing interpolants [2018-06-25 01:07:07,323 WARN ]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 01:07:07,323 WARN ]: Verification canceled [2018-06-25 01:07:07,326 INFO ]: Did not count any witness invariants because Icfg is not BoogieIcfg [2018-06-25 01:07:07,327 WARN ]: Timeout [2018-06-25 01:07:07,327 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.06 01:07:07 BasicIcfg [2018-06-25 01:07:07,327 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-25 01:07:07,328 INFO ]: Toolchain (without parser) took 67295.32 ms. Allocated memory was 306.2 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 234.6 MB in the beginning and 424.2 MB in the end (delta: -189.5 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-25 01:07:07,331 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 306.2 MB. Free memory is still 271.7 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-25 01:07:07,332 INFO ]: ChcToBoogie took 74.25 ms. Allocated memory is still 306.2 MB. Free memory was 233.7 MB in the beginning and 231.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-25 01:07:07,332 INFO ]: Boogie Preprocessor took 82.87 ms. Allocated memory is still 306.2 MB. Free memory was 231.7 MB in the beginning and 229.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-25 01:07:07,333 INFO ]: RCFGBuilder took 401.94 ms. Allocated memory is still 306.2 MB. Free memory was 229.7 MB in the beginning and 202.1 MB in the end (delta: 27.6 MB). Peak memory consumption was 27.6 MB. Max. memory is 3.6 GB. [2018-06-25 01:07:07,333 INFO ]: BlockEncodingV2 took 438.25 ms. Allocated memory was 306.2 MB in the beginning and 322.4 MB in the end (delta: 16.3 MB). Free memory was 202.1 MB in the beginning and 286.3 MB in the end (delta: -84.2 MB). Peak memory consumption was 21.7 MB. Max. memory is 3.6 GB. [2018-06-25 01:07:07,342 INFO ]: TraceAbstraction took 66287.07 ms. Allocated memory was 322.4 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 286.3 MB in the beginning and 424.2 MB in the end (delta: -137.9 MB). Peak memory consumption was 1.4 GB. Max. memory is 3.6 GB. [2018-06-25 01:07:07,345 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, 11 edges * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.07 ms. Allocated memory is still 306.2 MB. Free memory is still 271.7 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 74.25 ms. Allocated memory is still 306.2 MB. Free memory was 233.7 MB in the beginning and 231.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 82.87 ms. Allocated memory is still 306.2 MB. Free memory was 231.7 MB in the beginning and 229.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 401.94 ms. Allocated memory is still 306.2 MB. Free memory was 229.7 MB in the beginning and 202.1 MB in the end (delta: 27.6 MB). Peak memory consumption was 27.6 MB. Max. memory is 3.6 GB. * BlockEncodingV2 took 438.25 ms. Allocated memory was 306.2 MB in the beginning and 322.4 MB in the end (delta: 16.3 MB). Free memory was 202.1 MB in the beginning and 286.3 MB in the end (delta: -84.2 MB). Peak memory consumption was 21.7 MB. Max. memory is 3.6 GB. * TraceAbstraction took 66287.07 ms. Allocated memory was 322.4 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 286.3 MB in the beginning and 424.2 MB in the end (delta: -137.9 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 29630 quantified variables from 17 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 6 locations, 1 error locations. TIMEOUT Result, 66.2s OverallTime, 7 OverallIterations, 3 TraceHistogramMax, 0.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 60 SDtfs, 0 SDslu, 39 SDs, 0 SdLazy, 63 SolverSat, 37 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=9occurred in iteration=5, 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, 6 MinimizatonAttempts, 14 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 11.3s InterpolantComputationTime, 60 NumberOfCodeBlocks, 60 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 50 ConstructedInterpolants, 0 QuantifiedInterpolants, 706 SizeOfPredicates, 28 NumberOfNonLiveVariables, 1034 ConjunctsInSsa, 78 ConjunctsInUnsatCore, 10 InterpolantComputations, 2 PerfectInterpolantSequences, 0/12 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/lifo.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-GraphSizeCsvProvider-0-2018-06-25_01-07-07-365.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/lifo.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-GraphSizeCsvProvider-1-2018-06-25_01-07-07-365.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/lifo.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-Benchmark-0-2018-06-25_01-07-07-365.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/lifo.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-25_01-07-07-365.csv Completed graceful shutdown