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/lifnat.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-14921ce [2018-06-25 01:04:47,006 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-25 01:04:47,010 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-25 01:04:47,025 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-25 01:04:47,026 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-25 01:04:47,027 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-25 01:04:47,030 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-25 01:04:47,033 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-25 01:04:47,034 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-25 01:04:47,036 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-25 01:04:47,037 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-25 01:04:47,037 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-25 01:04:47,038 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-25 01:04:47,039 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-25 01:04:47,039 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-25 01:04:47,043 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-25 01:04:47,045 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-25 01:04:47,059 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-25 01:04:47,060 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-25 01:04:47,062 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-25 01:04:47,063 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-25 01:04:47,065 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-25 01:04:47,065 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-25 01:04:47,065 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-25 01:04:47,066 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-25 01:04:47,067 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-25 01:04:47,067 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-25 01:04:47,072 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-25 01:04:47,073 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-25 01:04:47,074 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-25 01:04:47,074 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-25 01:04:47,075 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-25 01:04:47,075 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-25 01:04:47,079 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-25 01:04:47,080 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-25 01:04:47,080 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-25 01:04:47,102 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-25 01:04:47,104 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-25 01:04:47,105 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-25 01:04:47,105 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-25 01:04:47,106 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-25 01:04:47,106 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-25 01:04:47,106 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-25 01:04:47,106 INFO L133 SettingsManager]: * Use SBE=true [2018-06-25 01:04:47,107 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-25 01:04:47,107 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-25 01:04:47,107 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-25 01:04:47,107 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-25 01:04:47,107 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-25 01:04:47,109 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-25 01:04:47,109 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-25 01:04:47,109 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-25 01:04:47,109 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-25 01:04:47,110 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-25 01:04:47,110 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-25 01:04:47,110 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-25 01:04:47,110 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-25 01:04:47,111 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-25 01:04:47,112 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-25 01:04:47,162 INFO ]: Repository-Root is: /tmp [2018-06-25 01:04:47,182 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-25 01:04:47,189 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-25 01:04:47,190 INFO ]: Initializing SmtParser... [2018-06-25 01:04:47,190 INFO ]: SmtParser initialized [2018-06-25 01:04:47,191 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/lifnat.c.smt2 [2018-06-25 01:04:47,193 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 01:04:47,289 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/lifnat.c.smt2 unknown [2018-06-25 01:04:47,857 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/lifnat.c.smt2 [2018-06-25 01:04:47,862 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-25 01:04:47,868 INFO ]: Walking toolchain with 5 elements. [2018-06-25 01:04:47,869 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-25 01:04:47,869 INFO ]: Initializing ChcToBoogie... [2018-06-25 01:04:47,869 INFO ]: ChcToBoogie initialized [2018-06-25 01:04:47,872 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 01:04:47" (1/1) ... [2018-06-25 01:04:47,935 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:04:47 Unit [2018-06-25 01:04:47,936 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-25 01:04:47,937 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-25 01:04:47,937 INFO ]: Initializing Boogie Preprocessor... [2018-06-25 01:04:47,937 INFO ]: Boogie Preprocessor initialized [2018-06-25 01:04:47,958 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:04:47" (1/1) ... [2018-06-25 01:04:47,958 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:04:47" (1/1) ... [2018-06-25 01:04:47,981 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:04:47" (1/1) ... [2018-06-25 01:04:47,981 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:04:47" (1/1) ... [2018-06-25 01:04:48,005 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:04:47" (1/1) ... [2018-06-25 01:04:48,011 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:04:47" (1/1) ... [2018-06-25 01:04:48,014 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:04:47" (1/1) ... [2018-06-25 01:04:48,019 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-25 01:04:48,019 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-25 01:04:48,019 INFO ]: Initializing RCFGBuilder... [2018-06-25 01:04:48,019 INFO ]: RCFGBuilder initialized [2018-06-25 01:04:48,020 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:04:47" (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 01:04:48,034 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-25 01:04:48,034 INFO ]: Found specification of procedure gotoProc [2018-06-25 01:04:48,034 INFO ]: Found implementation of procedure gotoProc [2018-06-25 01:04:48,034 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-25 01:04:48,034 INFO ]: Found specification of procedure Ultimate.START [2018-06-25 01:04:48,034 INFO ]: Found implementation of procedure Ultimate.START [2018-06-25 01:04:48,470 INFO ]: Using library mode [2018-06-25 01:04:48,471 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 01:04:48 BoogieIcfgContainer [2018-06-25 01:04:48,471 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-25 01:04:48,471 INFO ]: ------------------------BlockEncodingV2---------------------------- [2018-06-25 01:04:48,471 INFO ]: Initializing BlockEncodingV2... [2018-06-25 01:04:48,472 INFO ]: BlockEncodingV2 initialized [2018-06-25 01:04:48,473 INFO ]: Executing the observer BlockEncodingObserver from plugin BlockEncodingV2 for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 01:04:48" (1/1) ... [2018-06-25 01:04:48,488 INFO ]: Initial Icfg 10 locations, 10 edges [2018-06-25 01:04:48,491 INFO ]: Using Remove infeasible edges [2018-06-25 01:04:48,492 INFO ]: Using Maximize final states [2018-06-25 01:04:48,492 INFO ]: Using Minimize states even if more edges are added than removed.=false [2018-06-25 01:04:48,493 INFO ]: Using Minimize states using LBE with the strategy=MULTI [2018-06-25 01:04:48,499 INFO ]: Using Remove sink states [2018-06-25 01:04:48,501 INFO ]: Using Apply optimizations until nothing changes=true [2018-06-25 01:04:48,501 INFO ]: Using Use SBE [2018-06-25 01:04:48,509 WARN ]: expecting exponential blowup for input size 8 [2018-06-25 01:04:48,926 WARN ]: aborting because of expected exponential blowup for input size 156 [2018-06-25 01:04:48,947 WARN ]: aborting because of expected exponential blowup for input size 156 [2018-06-25 01:04:48,947 INFO ]: SBE split 1 edges [2018-06-25 01:04:48,955 INFO ]: Removed 2 edges and 2 locations because of local infeasibility [2018-06-25 01:04:48,957 INFO ]: 0 new accepting states [2018-06-25 01:04:49,161 INFO ]: Removed 13 edges and 2 locations by large block encoding [2018-06-25 01:04:49,163 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-25 01:04:49,165 INFO ]: Removed 0 edges and 0 locations because of local infeasibility [2018-06-25 01:04:49,165 INFO ]: 0 new accepting states [2018-06-25 01:04:49,165 INFO ]: Removed 0 edges and 0 locations by large block encoding [2018-06-25 01:04:49,165 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-25 01:04:49,166 INFO ]: Encoded RCFG 6 locations, 15 edges [2018-06-25 01:04:49,166 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 25.06 01:04:49 BasicIcfg [2018-06-25 01:04:49,166 INFO ]: ------------------------ END BlockEncodingV2---------------------------- [2018-06-25 01:04:49,168 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-25 01:04:49,168 INFO ]: Initializing TraceAbstraction... [2018-06-25 01:04:49,173 INFO ]: TraceAbstraction initialized [2018-06-25 01:04:49,173 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 01:04:47" (1/4) ... [2018-06-25 01:04:49,174 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@749b9704 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 25.06 01:04:49, skipping insertion in model container [2018-06-25 01:04:49,174 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:04:47" (2/4) ... [2018-06-25 01:04:49,174 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@749b9704 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.06 01:04:49, skipping insertion in model container [2018-06-25 01:04:49,174 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 01:04:48" (3/4) ... [2018-06-25 01:04:49,174 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@749b9704 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.06 01:04:49, skipping insertion in model container [2018-06-25 01:04:49,174 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 25.06 01:04:49" (4/4) ... [2018-06-25 01:04:49,177 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver_BEv2 [2018-06-25 01:04:49,188 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-25 01:04:49,198 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-25 01:04:49,254 INFO ]: Using default assertion order modulation [2018-06-25 01:04:49,256 INFO ]: Interprodecural is true [2018-06-25 01:04:49,256 INFO ]: Hoare is false [2018-06-25 01:04:49,256 INFO ]: Compute interpolants for FPandBP [2018-06-25 01:04:49,256 INFO ]: Backedges is TWOTRACK [2018-06-25 01:04:49,256 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-25 01:04:49,256 INFO ]: Difference is false [2018-06-25 01:04:49,256 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-25 01:04:49,256 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-25 01:04:49,271 INFO ]: Start isEmpty. Operand 6 states. [2018-06-25 01:04:49,281 INFO ]: Finished isEmpty. Found accepting run of length 6 [2018-06-25 01:04:49,282 INFO ]: Found error trace [2018-06-25 01:04:49,282 INFO ]: trace histogram [1, 1, 1, 1, 1] [2018-06-25 01:04:49,283 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 01:04:49,288 INFO ]: Analyzing trace with hash 35718731, now seen corresponding path program 1 times [2018-06-25 01:04:49,290 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 01:04:49,291 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 01:04:49,324 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:04:49,324 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 01:04:49,324 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:04:49,373 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:04:49,460 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:04:49,461 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-25 01:04:49,461 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-25 01:04:49,462 INFO ]: Interpolant automaton has 3 states [2018-06-25 01:04:49,473 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-25 01:04:49,474 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 01:04:49,476 INFO ]: Start difference. First operand 6 states. Second operand 3 states. [2018-06-25 01:04:49,694 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 01:04:49,694 INFO ]: Finished difference Result 7 states and 16 transitions. [2018-06-25 01:04:49,697 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-25 01:04:49,698 INFO ]: Start accepts. Automaton has 3 states. Word has length 5 [2018-06-25 01:04:49,699 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 01:04:49,711 INFO ]: With dead ends: 7 [2018-06-25 01:04:49,711 INFO ]: Without dead ends: 7 [2018-06-25 01:04:49,713 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 01:04:49,741 INFO ]: Start minimizeSevpa. Operand 7 states. [2018-06-25 01:04:49,763 INFO ]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-06-25 01:04:49,764 INFO ]: Start removeUnreachable. Operand 7 states. [2018-06-25 01:04:49,765 INFO ]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2018-06-25 01:04:49,766 INFO ]: Start accepts. Automaton has 7 states and 16 transitions. Word has length 5 [2018-06-25 01:04:49,767 INFO ]: Finished accepts. word is rejected. [2018-06-25 01:04:49,767 INFO ]: Abstraction has 7 states and 16 transitions. [2018-06-25 01:04:49,767 INFO ]: Interpolant automaton has 3 states. [2018-06-25 01:04:49,767 INFO ]: Start isEmpty. Operand 7 states and 16 transitions. [2018-06-25 01:04:49,768 INFO ]: Finished isEmpty. Found accepting run of length 6 [2018-06-25 01:04:49,768 INFO ]: Found error trace [2018-06-25 01:04:49,768 INFO ]: trace histogram [1, 1, 1, 1, 1] [2018-06-25 01:04:49,768 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 01:04:49,768 INFO ]: Analyzing trace with hash 35748522, now seen corresponding path program 1 times [2018-06-25 01:04:49,768 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 01:04:49,768 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 01:04:49,769 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:04:49,769 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 01:04:49,769 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:04:49,778 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:04:49,825 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:04:49,825 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-25 01:04:49,825 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-25 01:04:49,826 INFO ]: Interpolant automaton has 3 states [2018-06-25 01:04:49,827 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-25 01:04:49,827 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 01:04:49,827 INFO ]: Start difference. First operand 7 states and 16 transitions. Second operand 3 states. [2018-06-25 01:04:50,018 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 01:04:50,018 INFO ]: Finished difference Result 8 states and 17 transitions. [2018-06-25 01:04:50,019 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-25 01:04:50,019 INFO ]: Start accepts. Automaton has 3 states. Word has length 5 [2018-06-25 01:04:50,019 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 01:04:50,020 INFO ]: With dead ends: 8 [2018-06-25 01:04:50,020 INFO ]: Without dead ends: 8 [2018-06-25 01:04:50,021 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 01:04:50,021 INFO ]: Start minimizeSevpa. Operand 8 states. [2018-06-25 01:04:50,022 INFO ]: Finished minimizeSevpa. Reduced states from 8 to 7. [2018-06-25 01:04:50,022 INFO ]: Start removeUnreachable. Operand 7 states. [2018-06-25 01:04:50,022 INFO ]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2018-06-25 01:04:50,022 INFO ]: Start accepts. Automaton has 7 states and 16 transitions. Word has length 5 [2018-06-25 01:04:50,022 INFO ]: Finished accepts. word is rejected. [2018-06-25 01:04:50,022 INFO ]: Abstraction has 7 states and 16 transitions. [2018-06-25 01:04:50,022 INFO ]: Interpolant automaton has 3 states. [2018-06-25 01:04:50,022 INFO ]: Start isEmpty. Operand 7 states and 16 transitions. [2018-06-25 01:04:50,023 INFO ]: Finished isEmpty. Found accepting run of length 7 [2018-06-25 01:04:50,023 INFO ]: Found error trace [2018-06-25 01:04:50,023 INFO ]: trace histogram [1, 1, 1, 1, 1, 1] [2018-06-25 01:04:50,023 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 01:04:50,023 INFO ]: Analyzing trace with hash 1106437062, now seen corresponding path program 1 times [2018-06-25 01:04:50,023 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 01:04:50,023 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 01:04:50,024 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:04:50,024 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 01:04:50,024 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:04:50,173 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:04:50,386 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:04:50,386 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 01:04:50,386 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-06-25 01:04:50,452 INFO ]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 01:04:50,570 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:04:50,580 INFO ]: Computing forward predicates... [2018-06-25 01:04:52,359 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:04:52,385 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 01:04:52,385 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-06-25 01:04:52,385 INFO ]: Interpolant automaton has 4 states [2018-06-25 01:04:52,385 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-25 01:04:52,385 INFO ]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-06-25 01:04:52,385 INFO ]: Start difference. First operand 7 states and 16 transitions. Second operand 4 states. [2018-06-25 01:04:52,430 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 01:04:52,430 INFO ]: Finished difference Result 9 states and 18 transitions. [2018-06-25 01:04:52,432 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-25 01:04:52,432 INFO ]: Start accepts. Automaton has 4 states. Word has length 6 [2018-06-25 01:04:52,432 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 01:04:52,432 INFO ]: With dead ends: 9 [2018-06-25 01:04:52,432 INFO ]: Without dead ends: 9 [2018-06-25 01:04:52,433 INFO ]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-06-25 01:04:52,433 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-25 01:04:52,434 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 8. [2018-06-25 01:04:52,434 INFO ]: Start removeUnreachable. Operand 8 states. [2018-06-25 01:04:52,434 INFO ]: Finished removeUnreachable. Reduced from 8 states to 8 states and 17 transitions. [2018-06-25 01:04:52,434 INFO ]: Start accepts. Automaton has 8 states and 17 transitions. Word has length 6 [2018-06-25 01:04:52,434 INFO ]: Finished accepts. word is rejected. [2018-06-25 01:04:52,435 INFO ]: Abstraction has 8 states and 17 transitions. [2018-06-25 01:04:52,435 INFO ]: Interpolant automaton has 4 states. [2018-06-25 01:04:52,435 INFO ]: Start isEmpty. Operand 8 states and 17 transitions. [2018-06-25 01:04:52,435 INFO ]: Finished isEmpty. Found accepting run of length 7 [2018-06-25 01:04:52,435 INFO ]: Found error trace [2018-06-25 01:04:52,435 INFO ]: trace histogram [1, 1, 1, 1, 1, 1] [2018-06-25 01:04:52,435 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 01:04:52,435 INFO ]: Analyzing trace with hash 1111054667, now seen corresponding path program 1 times [2018-06-25 01:04:52,435 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 01:04:52,435 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 01:04:52,436 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:04:52,436 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 01:04:52,436 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:04:52,505 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:04:52,716 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:04:52,716 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 01:04:52,716 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 01:04:52,730 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 01:04:52,794 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:04:52,797 INFO ]: Computing forward predicates... [2018-06-25 01:04:53,156 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 01:04:56,004 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:04:56,024 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 01:04:56,024 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-25 01:04:56,025 INFO ]: Interpolant automaton has 5 states [2018-06-25 01:04:56,025 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-25 01:04:56,025 INFO ]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-06-25 01:04:56,025 INFO ]: Start difference. First operand 8 states and 17 transitions. Second operand 5 states. [2018-06-25 01:04:56,075 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 01:04:56,075 INFO ]: Finished difference Result 13 states and 22 transitions. [2018-06-25 01:04:56,076 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-25 01:04:56,076 INFO ]: Start accepts. Automaton has 5 states. Word has length 6 [2018-06-25 01:04:56,076 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 01:04:56,077 INFO ]: With dead ends: 13 [2018-06-25 01:04:56,077 INFO ]: Without dead ends: 13 [2018-06-25 01:04:56,077 INFO ]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-06-25 01:04:56,077 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-25 01:04:56,079 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 8. [2018-06-25 01:04:56,079 INFO ]: Start removeUnreachable. Operand 8 states. [2018-06-25 01:04:56,079 INFO ]: Finished removeUnreachable. Reduced from 8 states to 8 states and 17 transitions. [2018-06-25 01:04:56,079 INFO ]: Start accepts. Automaton has 8 states and 17 transitions. Word has length 6 [2018-06-25 01:04:56,079 INFO ]: Finished accepts. word is rejected. [2018-06-25 01:04:56,079 INFO ]: Abstraction has 8 states and 17 transitions. [2018-06-25 01:04:56,079 INFO ]: Interpolant automaton has 5 states. [2018-06-25 01:04:56,079 INFO ]: Start isEmpty. Operand 8 states and 17 transitions. [2018-06-25 01:04:56,080 INFO ]: Finished isEmpty. Found accepting run of length 7 [2018-06-25 01:04:56,080 INFO ]: Found error trace [2018-06-25 01:04:56,080 INFO ]: trace histogram [1, 1, 1, 1, 1, 1] [2018-06-25 01:04:56,080 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 01:04:56,080 INFO ]: Analyzing trace with hash 1112901709, now seen corresponding path program 1 times [2018-06-25 01:04:56,080 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 01:04:56,080 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 01:04:56,081 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:04:56,081 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 01:04:56,081 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:04:56,117 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:04:56,248 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:04:56,248 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 01:04:56,248 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 01:04:56,255 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 01:04:56,296 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:04:56,298 INFO ]: Computing forward predicates... [2018-06-25 01:04:56,626 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 01:04:58,307 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:04:58,328 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 01:04:58,328 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-25 01:04:58,328 INFO ]: Interpolant automaton has 5 states [2018-06-25 01:04:58,328 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-25 01:04:58,328 INFO ]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-06-25 01:04:58,328 INFO ]: Start difference. First operand 8 states and 17 transitions. Second operand 5 states. [2018-06-25 01:04:58,367 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 01:04:58,367 INFO ]: Finished difference Result 12 states and 21 transitions. [2018-06-25 01:04:58,367 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-25 01:04:58,367 INFO ]: Start accepts. Automaton has 5 states. Word has length 6 [2018-06-25 01:04:58,368 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 01:04:58,368 INFO ]: With dead ends: 12 [2018-06-25 01:04:58,368 INFO ]: Without dead ends: 12 [2018-06-25 01:04:58,368 INFO ]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-06-25 01:04:58,368 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-25 01:04:58,370 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 8. [2018-06-25 01:04:58,370 INFO ]: Start removeUnreachable. Operand 8 states. [2018-06-25 01:04:58,370 INFO ]: Finished removeUnreachable. Reduced from 8 states to 8 states and 17 transitions. [2018-06-25 01:04:58,370 INFO ]: Start accepts. Automaton has 8 states and 17 transitions. Word has length 6 [2018-06-25 01:04:58,370 INFO ]: Finished accepts. word is rejected. [2018-06-25 01:04:58,370 INFO ]: Abstraction has 8 states and 17 transitions. [2018-06-25 01:04:58,370 INFO ]: Interpolant automaton has 5 states. [2018-06-25 01:04:58,370 INFO ]: Start isEmpty. Operand 8 states and 17 transitions. [2018-06-25 01:04:58,371 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-25 01:04:58,371 INFO ]: Found error trace [2018-06-25 01:04:58,371 INFO ]: trace histogram [2, 1, 1, 1, 1, 1] [2018-06-25 01:04:58,371 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 01:04:58,371 INFO ]: Analyzing trace with hash -61033045, now seen corresponding path program 2 times [2018-06-25 01:04:58,371 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 01:04:58,371 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 01:04:58,372 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:04:58,372 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 01:04:58,372 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:04:58,437 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:04:59,144 WARN ]: Spent 483.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 8 [2018-06-25 01:04:59,153 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:04:59,153 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 01:04:59,153 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 01:04:59,159 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-25 01:04:59,241 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-25 01:04:59,241 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:04:59,245 INFO ]: Computing forward predicates... [2018-06-25 01:05:00,693 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:05:00,714 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 01:05:00,714 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-06-25 01:05:00,714 INFO ]: Interpolant automaton has 6 states [2018-06-25 01:05:00,714 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-25 01:05:00,714 INFO ]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-06-25 01:05:00,715 INFO ]: Start difference. First operand 8 states and 17 transitions. Second operand 6 states. [2018-06-25 01:05:00,816 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 01:05:00,816 INFO ]: Finished difference Result 11 states and 20 transitions. [2018-06-25 01:05:00,817 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-25 01:05:00,817 INFO ]: Start accepts. Automaton has 6 states. Word has length 7 [2018-06-25 01:05:00,817 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 01:05:00,817 INFO ]: With dead ends: 11 [2018-06-25 01:05:00,817 INFO ]: Without dead ends: 11 [2018-06-25 01:05:00,817 INFO ]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2018-06-25 01:05:00,818 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-25 01:05:00,818 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 9. [2018-06-25 01:05:00,818 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-25 01:05:00,819 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 18 transitions. [2018-06-25 01:05:00,819 INFO ]: Start accepts. Automaton has 9 states and 18 transitions. Word has length 7 [2018-06-25 01:05:00,819 INFO ]: Finished accepts. word is rejected. [2018-06-25 01:05:00,819 INFO ]: Abstraction has 9 states and 18 transitions. [2018-06-25 01:05:00,819 INFO ]: Interpolant automaton has 6 states. [2018-06-25 01:05:00,819 INFO ]: Start isEmpty. Operand 9 states and 18 transitions. [2018-06-25 01:05:00,819 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-25 01:05:00,819 INFO ]: Found error trace [2018-06-25 01:05:00,819 INFO ]: trace histogram [2, 1, 1, 1, 1, 1] [2018-06-25 01:05:00,819 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 01:05:00,819 INFO ]: Analyzing trace with hash 82112710, now seen corresponding path program 2 times [2018-06-25 01:05:00,819 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 01:05:00,819 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 01:05:00,820 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:05:00,820 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 01:05:00,820 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:05:00,875 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:05:01,029 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:05:01,029 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 01:05:01,029 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 01:05:01,036 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-25 01:05:01,146 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-25 01:05:01,146 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:05:01,150 INFO ]: Computing forward predicates... [2018-06-25 01:05:05,854 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:05:05,874 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 01:05:05,874 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-06-25 01:05:05,874 INFO ]: Interpolant automaton has 5 states [2018-06-25 01:05:05,874 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-25 01:05:05,874 INFO ]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-06-25 01:05:05,875 INFO ]: Start difference. First operand 9 states and 18 transitions. Second operand 5 states. [2018-06-25 01:05:05,973 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 01:05:05,973 INFO ]: Finished difference Result 15 states and 24 transitions. [2018-06-25 01:05:05,973 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-25 01:05:05,973 INFO ]: Start accepts. Automaton has 5 states. Word has length 7 [2018-06-25 01:05:05,973 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 01:05:05,973 INFO ]: With dead ends: 15 [2018-06-25 01:05:05,973 INFO ]: Without dead ends: 15 [2018-06-25 01:05:05,973 INFO ]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-06-25 01:05:05,973 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-25 01:05:05,974 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 9. [2018-06-25 01:05:05,974 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-25 01:05:05,975 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 18 transitions. [2018-06-25 01:05:05,975 INFO ]: Start accepts. Automaton has 9 states and 18 transitions. Word has length 7 [2018-06-25 01:05:05,975 INFO ]: Finished accepts. word is rejected. [2018-06-25 01:05:05,975 INFO ]: Abstraction has 9 states and 18 transitions. [2018-06-25 01:05:05,975 INFO ]: Interpolant automaton has 5 states. [2018-06-25 01:05:05,975 INFO ]: Start isEmpty. Operand 9 states and 18 transitions. [2018-06-25 01:05:05,975 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-25 01:05:05,975 INFO ]: Found error trace [2018-06-25 01:05:05,975 INFO ]: trace histogram [2, 1, 1, 1, 1, 1] [2018-06-25 01:05:05,975 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 01:05:05,975 INFO ]: Analyzing trace with hash 139371012, now seen corresponding path program 2 times [2018-06-25 01:05:05,975 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 01:05:05,975 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 01:05:05,975 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:05:05,975 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 01:05:05,975 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:05:06,042 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:05:06,273 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:05:06,273 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 01:05:06,273 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 01:05:06,279 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-25 01:05:06,352 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-25 01:05:06,352 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:05:06,355 INFO ]: Computing forward predicates... [2018-06-25 01:05:08,781 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 01:05:18,074 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:05:18,094 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 01:05:18,094 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-06-25 01:05:18,094 INFO ]: Interpolant automaton has 6 states [2018-06-25 01:05:18,094 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-25 01:05:18,094 INFO ]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-06-25 01:05:18,094 INFO ]: Start difference. First operand 9 states and 18 transitions. Second operand 6 states. [2018-06-25 01:05:18,207 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 01:05:18,207 INFO ]: Finished difference Result 16 states and 25 transitions. [2018-06-25 01:05:18,207 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-25 01:05:18,207 INFO ]: Start accepts. Automaton has 6 states. Word has length 7 [2018-06-25 01:05:18,207 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 01:05:18,208 INFO ]: With dead ends: 16 [2018-06-25 01:05:18,208 INFO ]: Without dead ends: 16 [2018-06-25 01:05:18,208 INFO ]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2018-06-25 01:05:18,208 INFO ]: Start minimizeSevpa. Operand 16 states. [2018-06-25 01:05:18,209 INFO ]: Finished minimizeSevpa. Reduced states from 16 to 9. [2018-06-25 01:05:18,209 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-25 01:05:18,210 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 18 transitions. [2018-06-25 01:05:18,210 INFO ]: Start accepts. Automaton has 9 states and 18 transitions. Word has length 7 [2018-06-25 01:05:18,210 INFO ]: Finished accepts. word is rejected. [2018-06-25 01:05:18,210 INFO ]: Abstraction has 9 states and 18 transitions. [2018-06-25 01:05:18,210 INFO ]: Interpolant automaton has 6 states. [2018-06-25 01:05:18,210 INFO ]: Start isEmpty. Operand 9 states and 18 transitions. [2018-06-25 01:05:18,210 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-25 01:05:18,210 INFO ]: Found error trace [2018-06-25 01:05:18,210 INFO ]: trace histogram [3, 1, 1, 1, 1, 1] [2018-06-25 01:05:18,210 INFO ]: === Iteration 9 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 01:05:18,210 INFO ]: Analyzing trace with hash -1892867994, now seen corresponding path program 3 times [2018-06-25 01:05:18,210 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 01:05:18,210 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 01:05:18,211 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:05:18,211 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 01:05:18,211 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:05:18,295 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:05:18,532 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:05:18,532 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 01:05:18,532 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 01:05:18,541 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-25 01:05:18,651 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-25 01:05:18,651 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:05:18,656 INFO ]: Computing forward predicates... Received shutdown request... [2018-06-25 01:05:55,826 INFO ]: Timeout while computing interpolants [2018-06-25 01:05:56,026 WARN ]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 01:05:56,026 WARN ]: Verification canceled [2018-06-25 01:05:56,029 INFO ]: Did not count any witness invariants because Icfg is not BoogieIcfg [2018-06-25 01:05:56,030 WARN ]: Timeout [2018-06-25 01:05:56,030 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.06 01:05:56 BasicIcfg [2018-06-25 01:05:56,030 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-25 01:05:56,031 INFO ]: Toolchain (without parser) took 68167.71 ms. Allocated memory was 308.8 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 233.4 MB in the beginning and 223.2 MB in the end (delta: 10.2 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-25 01:05:56,031 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 308.8 MB. Free memory is still 274.4 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-25 01:05:56,032 INFO ]: ChcToBoogie took 67.19 ms. Allocated memory is still 308.8 MB. Free memory was 233.4 MB in the beginning and 230.5 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. [2018-06-25 01:05:56,032 INFO ]: Boogie Preprocessor took 82.13 ms. Allocated memory is still 308.8 MB. Free memory was 230.5 MB in the beginning and 228.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-25 01:05:56,033 INFO ]: RCFGBuilder took 451.65 ms. Allocated memory is still 308.8 MB. Free memory was 228.5 MB in the beginning and 199.4 MB in the end (delta: 29.1 MB). Peak memory consumption was 29.1 MB. Max. memory is 3.6 GB. [2018-06-25 01:05:56,033 INFO ]: BlockEncodingV2 took 695.32 ms. Allocated memory was 308.8 MB in the beginning and 326.6 MB in the end (delta: 17.8 MB). Free memory was 199.4 MB in the beginning and 274.3 MB in the end (delta: -74.9 MB). Peak memory consumption was 17.5 MB. Max. memory is 3.6 GB. [2018-06-25 01:05:56,034 INFO ]: TraceAbstraction took 66862.15 ms. Allocated memory was 326.6 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 274.3 MB in the beginning and 223.2 MB in the end (delta: 51.1 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-25 01:05:56,037 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, 15 edges * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.07 ms. Allocated memory is still 308.8 MB. Free memory is still 274.4 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 67.19 ms. Allocated memory is still 308.8 MB. Free memory was 233.4 MB in the beginning and 230.5 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 82.13 ms. Allocated memory is still 308.8 MB. Free memory was 230.5 MB in the beginning and 228.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 451.65 ms. Allocated memory is still 308.8 MB. Free memory was 228.5 MB in the beginning and 199.4 MB in the end (delta: 29.1 MB). Peak memory consumption was 29.1 MB. Max. memory is 3.6 GB. * BlockEncodingV2 took 695.32 ms. Allocated memory was 308.8 MB in the beginning and 326.6 MB in the end (delta: 17.8 MB). Free memory was 199.4 MB in the beginning and 274.3 MB in the end (delta: -74.9 MB). Peak memory consumption was 17.5 MB. Max. memory is 3.6 GB. * TraceAbstraction took 66862.15 ms. Allocated memory was 326.6 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 274.3 MB in the beginning and 223.2 MB in the end (delta: 51.1 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [UNKNOWN] : Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 9 with TraceHistMax 3, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 29 quantified variables from 47 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 6 locations, 1 error locations. TIMEOUT Result, 66.7s OverallTime, 9 OverallIterations, 3 TraceHistogramMax, 0.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 113 SDtfs, 0 SDslu, 60 SDs, 0 SdLazy, 108 SolverSat, 112 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 75 GetRequests, 36 SyntacticMatches, 9 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=9occurred in iteration=6, 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, 8 MinimizatonAttempts, 26 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 26.6s InterpolantComputationTime, 88 NumberOfCodeBlocks, 88 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 74 ConstructedInterpolants, 0 QuantifiedInterpolants, 1245 SizeOfPredicates, 42 NumberOfNonLiveVariables, 1926 ConjunctsInSsa, 131 ConjunctsInUnsatCore, 14 InterpolantComputations, 2 PerfectInterpolantSequences, 0/24 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/lifnat.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-GraphSizeCsvProvider-0-2018-06-25_01-05-56-048.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/lifnat.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-GraphSizeCsvProvider-1-2018-06-25_01-05-56-048.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/lifnat.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-Benchmark-0-2018-06-25_01-05-56-048.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/lifnat.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-25_01-05-56-048.csv Completed graceful shutdown