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/eldarica-misc/LIA/reve/013b-horn.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-62c3406-m [2018-06-26 18:06:11,961 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-26 18:06:11,963 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-26 18:06:11,974 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-26 18:06:11,974 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-26 18:06:11,975 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-26 18:06:11,976 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-26 18:06:11,978 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-26 18:06:11,979 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-26 18:06:11,980 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-26 18:06:11,981 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-26 18:06:11,981 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-26 18:06:11,982 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-26 18:06:11,983 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-26 18:06:11,984 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-26 18:06:11,984 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-26 18:06:11,985 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-26 18:06:11,996 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-26 18:06:11,998 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-26 18:06:12,000 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-26 18:06:12,001 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-26 18:06:12,002 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-26 18:06:12,004 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-26 18:06:12,004 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-26 18:06:12,010 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-26 18:06:12,012 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-26 18:06:12,012 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-26 18:06:12,013 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-26 18:06:12,014 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-26 18:06:12,015 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-26 18:06:12,015 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-26 18:06:12,015 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-26 18:06:12,016 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-06-26 18:06:12,021 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-26 18:06:12,022 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-26 18:06:12,022 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-26 18:06:12,022 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-26 18:06:12,050 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-26 18:06:12,050 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-26 18:06:12,050 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-26 18:06:12,051 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-26 18:06:12,051 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-26 18:06:12,052 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-26 18:06:12,052 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-26 18:06:12,052 INFO L133 SettingsManager]: * Use SBE=true [2018-06-26 18:06:12,052 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-26 18:06:12,052 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-26 18:06:12,053 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-26 18:06:12,053 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-26 18:06:12,053 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-26 18:06:12,053 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-26 18:06:12,053 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-26 18:06:12,054 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-26 18:06:12,054 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-26 18:06:12,054 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-26 18:06:12,054 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-26 18:06:12,054 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-26 18:06:12,055 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-26 18:06:12,056 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-26 18:06:12,056 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-26 18:06:12,106 INFO ]: Repository-Root is: /tmp [2018-06-26 18:06:12,120 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-26 18:06:12,125 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-26 18:06:12,126 INFO ]: Initializing SmtParser... [2018-06-26 18:06:12,126 INFO ]: SmtParser initialized [2018-06-26 18:06:12,127 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/eldarica-misc/LIA/reve/013b-horn.smt2 [2018-06-26 18:06:12,128 INFO ]: Parsing .smt2 file as a set of Horn Clauses No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-06-26 18:06:12,212 INFO ]: Executing SMT file /storage/chc-comp/eldarica-misc/LIA/reve/013b-horn.smt2 unknown [2018-06-26 18:06:12,439 INFO ]: Succesfully executed SMT file /storage/chc-comp/eldarica-misc/LIA/reve/013b-horn.smt2 [2018-06-26 18:06:12,444 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-26 18:06:12,453 INFO ]: Walking toolchain with 5 elements. [2018-06-26 18:06:12,453 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-26 18:06:12,453 INFO ]: Initializing ChcToBoogie... [2018-06-26 18:06:12,453 INFO ]: ChcToBoogie initialized [2018-06-26 18:06:12,457 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 26.06 06:06:12" (1/1) ... [2018-06-26 18:06:12,516 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 06:06:12 Unit [2018-06-26 18:06:12,516 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-26 18:06:12,517 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-26 18:06:12,517 INFO ]: Initializing Boogie Preprocessor... [2018-06-26 18:06:12,517 INFO ]: Boogie Preprocessor initialized [2018-06-26 18:06:12,533 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 06:06:12" (1/1) ... [2018-06-26 18:06:12,533 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 06:06:12" (1/1) ... [2018-06-26 18:06:12,539 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 06:06:12" (1/1) ... [2018-06-26 18:06:12,539 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 06:06:12" (1/1) ... [2018-06-26 18:06:12,544 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 06:06:12" (1/1) ... [2018-06-26 18:06:12,547 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 06:06:12" (1/1) ... [2018-06-26 18:06:12,548 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 06:06:12" (1/1) ... [2018-06-26 18:06:12,549 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-26 18:06:12,550 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-26 18:06:12,550 INFO ]: Initializing RCFGBuilder... [2018-06-26 18:06:12,550 INFO ]: RCFGBuilder initialized [2018-06-26 18:06:12,557 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 06:06:12" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2018-06-26 18:06:12,571 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-26 18:06:12,571 INFO ]: Found specification of procedure gotoProc [2018-06-26 18:06:12,571 INFO ]: Found implementation of procedure gotoProc [2018-06-26 18:06:12,571 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-26 18:06:12,571 INFO ]: Found specification of procedure Ultimate.START [2018-06-26 18:06:12,571 INFO ]: Found implementation of procedure Ultimate.START Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-26 18:06:12,936 INFO ]: Using library mode [2018-06-26 18:06:12,936 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.06 06:06:12 BoogieIcfgContainer [2018-06-26 18:06:12,936 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-26 18:06:12,937 INFO ]: ------------------------BlockEncodingV2---------------------------- [2018-06-26 18:06:12,937 INFO ]: Initializing BlockEncodingV2... [2018-06-26 18:06:12,938 INFO ]: BlockEncodingV2 initialized [2018-06-26 18:06:12,938 INFO ]: Executing the observer BlockEncodingObserver from plugin BlockEncodingV2 for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.06 06:06:12" (1/1) ... [2018-06-26 18:06:12,955 INFO ]: Initial Icfg 12 locations, 24 edges [2018-06-26 18:06:12,956 INFO ]: Using Remove infeasible edges [2018-06-26 18:06:12,957 INFO ]: Using Maximize final states [2018-06-26 18:06:12,957 INFO ]: Using Minimize states even if more edges are added than removed.=false [2018-06-26 18:06:12,957 INFO ]: Using Minimize states using LBE with the strategy=MULTI [2018-06-26 18:06:12,959 INFO ]: Using Remove sink states [2018-06-26 18:06:12,959 INFO ]: Using Apply optimizations until nothing changes=true [2018-06-26 18:06:12,959 INFO ]: Using Use SBE [2018-06-26 18:06:12,965 INFO ]: SBE split 0 edges [2018-06-26 18:06:12,972 INFO ]: Removed 6 edges and 2 locations because of local infeasibility [2018-06-26 18:06:12,973 INFO ]: 0 new accepting states [2018-06-26 18:06:13,031 INFO ]: Removed 9 edges and 2 locations by large block encoding [2018-06-26 18:06:13,033 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-26 18:06:13,035 INFO ]: Removed 0 edges and 0 locations because of local infeasibility [2018-06-26 18:06:13,035 INFO ]: 0 new accepting states [2018-06-26 18:06:13,035 INFO ]: Removed 0 edges and 0 locations by large block encoding [2018-06-26 18:06:13,035 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-26 18:06:13,036 INFO ]: Encoded RCFG 8 locations, 16 edges [2018-06-26 18:06:13,036 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 26.06 06:06:13 BasicIcfg [2018-06-26 18:06:13,036 INFO ]: ------------------------ END BlockEncodingV2---------------------------- [2018-06-26 18:06:13,037 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-26 18:06:13,037 INFO ]: Initializing TraceAbstraction... [2018-06-26 18:06:13,040 INFO ]: TraceAbstraction initialized [2018-06-26 18:06:13,040 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 26.06 06:06:12" (1/4) ... [2018-06-26 18:06:13,042 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66c82673 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 26.06 06:06:13, skipping insertion in model container [2018-06-26 18:06:13,042 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 06:06:12" (2/4) ... [2018-06-26 18:06:13,042 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66c82673 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.06 06:06:13, skipping insertion in model container [2018-06-26 18:06:13,042 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.06 06:06:12" (3/4) ... [2018-06-26 18:06:13,042 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66c82673 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.06 06:06:13, skipping insertion in model container [2018-06-26 18:06:13,042 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 26.06 06:06:13" (4/4) ... [2018-06-26 18:06:13,045 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver_BEv2 [2018-06-26 18:06:13,056 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-26 18:06:13,063 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-26 18:06:13,111 INFO ]: Using default assertion order modulation [2018-06-26 18:06:13,112 INFO ]: Interprodecural is true [2018-06-26 18:06:13,112 INFO ]: Hoare is false [2018-06-26 18:06:13,112 INFO ]: Compute interpolants for FPandBP [2018-06-26 18:06:13,112 INFO ]: Backedges is TWOTRACK [2018-06-26 18:06:13,112 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-26 18:06:13,112 INFO ]: Difference is false [2018-06-26 18:06:13,112 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-26 18:06:13,112 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-26 18:06:13,127 INFO ]: Start isEmpty. Operand 8 states. [2018-06-26 18:06:13,144 INFO ]: Finished isEmpty. Found accepting run of length 6 [2018-06-26 18:06:13,144 INFO ]: Found error trace [2018-06-26 18:06:13,145 INFO ]: trace histogram [1, 1, 1, 1, 1] [2018-06-26 18:06:13,145 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 18:06:13,149 INFO ]: Analyzing trace with hash 44146183, now seen corresponding path program 1 times [2018-06-26 18:06:13,151 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 18:06:13,151 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 18:06:13,184 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:06:13,184 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 18:06:13,184 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:06:13,230 INFO ]: Conjunction of SSA is unsat [2018-06-26 18:06:13,311 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 18:06:13,313 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-26 18:06:13,313 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-26 18:06:13,314 INFO ]: Interpolant automaton has 3 states [2018-06-26 18:06:13,324 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-26 18:06:13,325 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-26 18:06:13,327 INFO ]: Start difference. First operand 8 states. Second operand 3 states. [2018-06-26 18:06:13,437 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 18:06:13,438 INFO ]: Finished difference Result 9 states and 17 transitions. [2018-06-26 18:06:13,439 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-26 18:06:13,440 INFO ]: Start accepts. Automaton has 3 states. Word has length 5 [2018-06-26 18:06:13,440 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 18:06:13,452 INFO ]: With dead ends: 9 [2018-06-26 18:06:13,452 INFO ]: Without dead ends: 9 [2018-06-26 18:06:13,455 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-26 18:06:13,469 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-26 18:06:13,483 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-26 18:06:13,484 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-26 18:06:13,485 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 17 transitions. [2018-06-26 18:06:13,486 INFO ]: Start accepts. Automaton has 9 states and 17 transitions. Word has length 5 [2018-06-26 18:06:13,486 INFO ]: Finished accepts. word is rejected. [2018-06-26 18:06:13,486 INFO ]: Abstraction has 9 states and 17 transitions. [2018-06-26 18:06:13,486 INFO ]: Interpolant automaton has 3 states. [2018-06-26 18:06:13,486 INFO ]: Start isEmpty. Operand 9 states and 17 transitions. [2018-06-26 18:06:13,486 INFO ]: Finished isEmpty. Found accepting run of length 6 [2018-06-26 18:06:13,486 INFO ]: Found error trace [2018-06-26 18:06:13,486 INFO ]: trace histogram [1, 1, 1, 1, 1] [2018-06-26 18:06:13,486 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 18:06:13,487 INFO ]: Analyzing trace with hash 44176935, now seen corresponding path program 1 times [2018-06-26 18:06:13,487 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 18:06:13,487 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 18:06:13,487 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:06:13,487 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 18:06:13,488 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:06:13,496 INFO ]: Conjunction of SSA is unsat [2018-06-26 18:06:13,536 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 18:06:13,536 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-26 18:06:13,536 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-26 18:06:13,537 INFO ]: Interpolant automaton has 3 states [2018-06-26 18:06:13,538 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-26 18:06:13,538 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-26 18:06:13,538 INFO ]: Start difference. First operand 9 states and 17 transitions. Second operand 3 states. [2018-06-26 18:06:13,585 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 18:06:13,585 INFO ]: Finished difference Result 10 states and 15 transitions. [2018-06-26 18:06:13,585 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-26 18:06:13,585 INFO ]: Start accepts. Automaton has 3 states. Word has length 5 [2018-06-26 18:06:13,585 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 18:06:13,587 INFO ]: With dead ends: 10 [2018-06-26 18:06:13,587 INFO ]: Without dead ends: 10 [2018-06-26 18:06:13,587 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-26 18:06:13,587 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-26 18:06:13,589 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 8. [2018-06-26 18:06:13,589 INFO ]: Start removeUnreachable. Operand 8 states. [2018-06-26 18:06:13,589 INFO ]: Finished removeUnreachable. Reduced from 8 states to 8 states and 12 transitions. [2018-06-26 18:06:13,589 INFO ]: Start accepts. Automaton has 8 states and 12 transitions. Word has length 5 [2018-06-26 18:06:13,590 INFO ]: Finished accepts. word is rejected. [2018-06-26 18:06:13,590 INFO ]: Abstraction has 8 states and 12 transitions. [2018-06-26 18:06:13,590 INFO ]: Interpolant automaton has 3 states. [2018-06-26 18:06:13,590 INFO ]: Start isEmpty. Operand 8 states and 12 transitions. [2018-06-26 18:06:13,591 INFO ]: Finished isEmpty. Found accepting run of length 6 [2018-06-26 18:06:13,591 INFO ]: Found error trace [2018-06-26 18:06:13,591 INFO ]: trace histogram [1, 1, 1, 1, 1] [2018-06-26 18:06:13,591 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 18:06:13,591 INFO ]: Analyzing trace with hash 44178857, now seen corresponding path program 1 times [2018-06-26 18:06:13,591 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 18:06:13,591 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 18:06:13,592 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:06:13,592 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 18:06:13,592 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:06:13,600 INFO ]: Conjunction of SSA is unsat [2018-06-26 18:06:13,643 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 18:06:13,643 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-26 18:06:13,643 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-26 18:06:13,643 INFO ]: Interpolant automaton has 3 states [2018-06-26 18:06:13,643 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-26 18:06:13,643 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-26 18:06:13,643 INFO ]: Start difference. First operand 8 states and 12 transitions. Second operand 3 states. [2018-06-26 18:06:13,704 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 18:06:13,704 INFO ]: Finished difference Result 11 states and 18 transitions. [2018-06-26 18:06:13,705 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-26 18:06:13,705 INFO ]: Start accepts. Automaton has 3 states. Word has length 5 [2018-06-26 18:06:13,705 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 18:06:13,705 INFO ]: With dead ends: 11 [2018-06-26 18:06:13,705 INFO ]: Without dead ends: 11 [2018-06-26 18:06:13,705 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-26 18:06:13,705 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-26 18:06:13,707 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 9. [2018-06-26 18:06:13,707 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-26 18:06:13,707 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 15 transitions. [2018-06-26 18:06:13,707 INFO ]: Start accepts. Automaton has 9 states and 15 transitions. Word has length 5 [2018-06-26 18:06:13,707 INFO ]: Finished accepts. word is rejected. [2018-06-26 18:06:13,707 INFO ]: Abstraction has 9 states and 15 transitions. [2018-06-26 18:06:13,707 INFO ]: Interpolant automaton has 3 states. [2018-06-26 18:06:13,707 INFO ]: Start isEmpty. Operand 9 states and 15 transitions. [2018-06-26 18:06:13,708 INFO ]: Finished isEmpty. Found accepting run of length 7 [2018-06-26 18:06:13,708 INFO ]: Found error trace [2018-06-26 18:06:13,708 INFO ]: trace histogram [1, 1, 1, 1, 1, 1] [2018-06-26 18:06:13,708 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 18:06:13,708 INFO ]: Analyzing trace with hash 1368088014, now seen corresponding path program 1 times [2018-06-26 18:06:13,708 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 18:06:13,708 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 18:06:13,710 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:06:13,710 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 18:06:13,710 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:06:13,718 INFO ]: Conjunction of SSA is unsat [2018-06-26 18:06:13,750 INFO ]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 18:06:13,751 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-26 18:06:13,751 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-26 18:06:13,751 INFO ]: Interpolant automaton has 3 states [2018-06-26 18:06:13,751 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-26 18:06:13,751 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-26 18:06:13,751 INFO ]: Start difference. First operand 9 states and 15 transitions. Second operand 3 states. [2018-06-26 18:06:13,785 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 18:06:13,785 INFO ]: Finished difference Result 9 states and 14 transitions. [2018-06-26 18:06:13,786 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-26 18:06:13,786 INFO ]: Start accepts. Automaton has 3 states. Word has length 6 [2018-06-26 18:06:13,786 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 18:06:13,787 INFO ]: With dead ends: 9 [2018-06-26 18:06:13,787 INFO ]: Without dead ends: 8 [2018-06-26 18:06:13,787 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-26 18:06:13,787 INFO ]: Start minimizeSevpa. Operand 8 states. [2018-06-26 18:06:13,788 INFO ]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-06-26 18:06:13,788 INFO ]: Start removeUnreachable. Operand 8 states. [2018-06-26 18:06:13,788 INFO ]: Finished removeUnreachable. Reduced from 8 states to 8 states and 13 transitions. [2018-06-26 18:06:13,789 INFO ]: Start accepts. Automaton has 8 states and 13 transitions. Word has length 6 [2018-06-26 18:06:13,789 INFO ]: Finished accepts. word is rejected. [2018-06-26 18:06:13,789 INFO ]: Abstraction has 8 states and 13 transitions. [2018-06-26 18:06:13,789 INFO ]: Interpolant automaton has 3 states. [2018-06-26 18:06:13,789 INFO ]: Start isEmpty. Operand 8 states and 13 transitions. [2018-06-26 18:06:13,789 INFO ]: Finished isEmpty. Found accepting run of length 7 [2018-06-26 18:06:13,789 INFO ]: Found error trace [2018-06-26 18:06:13,789 INFO ]: trace histogram [1, 1, 1, 1, 1, 1] [2018-06-26 18:06:13,789 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 18:06:13,789 INFO ]: Analyzing trace with hash 1368802998, now seen corresponding path program 1 times [2018-06-26 18:06:13,789 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 18:06:13,789 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 18:06:13,791 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:06:13,791 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 18:06:13,791 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:06:13,817 INFO ]: Conjunction of SSA is unsat [2018-06-26 18:06:13,960 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 18:06:13,960 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-26 18:06:13,960 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-26 18:06:13,960 INFO ]: Interpolant automaton has 4 states [2018-06-26 18:06:13,960 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-26 18:06:13,960 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-26 18:06:13,960 INFO ]: Start difference. First operand 8 states and 13 transitions. Second operand 4 states. [2018-06-26 18:06:14,079 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 18:06:14,079 INFO ]: Finished difference Result 11 states and 17 transitions. [2018-06-26 18:06:14,079 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-26 18:06:14,079 INFO ]: Start accepts. Automaton has 4 states. Word has length 6 [2018-06-26 18:06:14,079 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 18:06:14,080 INFO ]: With dead ends: 11 [2018-06-26 18:06:14,080 INFO ]: Without dead ends: 11 [2018-06-26 18:06:14,080 INFO ]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-06-26 18:06:14,080 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-26 18:06:14,081 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 9. [2018-06-26 18:06:14,081 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-26 18:06:14,082 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 14 transitions. [2018-06-26 18:06:14,082 INFO ]: Start accepts. Automaton has 9 states and 14 transitions. Word has length 6 [2018-06-26 18:06:14,082 INFO ]: Finished accepts. word is rejected. [2018-06-26 18:06:14,082 INFO ]: Abstraction has 9 states and 14 transitions. [2018-06-26 18:06:14,082 INFO ]: Interpolant automaton has 4 states. [2018-06-26 18:06:14,082 INFO ]: Start isEmpty. Operand 9 states and 14 transitions. [2018-06-26 18:06:14,082 INFO ]: Finished isEmpty. Found accepting run of length 7 [2018-06-26 18:06:14,082 INFO ]: Found error trace [2018-06-26 18:06:14,082 INFO ]: trace histogram [1, 1, 1, 1, 1, 1] [2018-06-26 18:06:14,082 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 18:06:14,083 INFO ]: Analyzing trace with hash 1368835672, now seen corresponding path program 1 times [2018-06-26 18:06:14,083 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 18:06:14,083 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 18:06:14,083 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:06:14,083 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 18:06:14,083 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:06:14,093 INFO ]: Conjunction of SSA is unsat [2018-06-26 18:06:14,227 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 18:06:14,227 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-26 18:06:14,227 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-26 18:06:14,235 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 18:06:14,251 INFO ]: Conjunction of SSA is unsat [2018-06-26 18:06:14,258 INFO ]: Computing forward predicates... [2018-06-26 18:06:14,301 INFO ]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-26 18:06:14,321 INFO ]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-06-26 18:06:14,321 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2018-06-26 18:06:14,322 INFO ]: Interpolant automaton has 5 states [2018-06-26 18:06:14,322 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-26 18:06:14,322 INFO ]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-06-26 18:06:14,322 INFO ]: Start difference. First operand 9 states and 14 transitions. Second operand 5 states. [2018-06-26 18:06:14,379 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 18:06:14,379 INFO ]: Finished difference Result 9 states and 11 transitions. [2018-06-26 18:06:14,379 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-26 18:06:14,379 INFO ]: Start accepts. Automaton has 5 states. Word has length 6 [2018-06-26 18:06:14,379 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 18:06:14,379 INFO ]: With dead ends: 9 [2018-06-26 18:06:14,379 INFO ]: Without dead ends: 9 [2018-06-26 18:06:14,380 INFO ]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-06-26 18:06:14,380 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-26 18:06:14,381 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-26 18:06:14,381 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-26 18:06:14,381 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2018-06-26 18:06:14,381 INFO ]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 6 [2018-06-26 18:06:14,382 INFO ]: Finished accepts. word is rejected. [2018-06-26 18:06:14,382 INFO ]: Abstraction has 9 states and 11 transitions. [2018-06-26 18:06:14,382 INFO ]: Interpolant automaton has 5 states. [2018-06-26 18:06:14,382 INFO ]: Start isEmpty. Operand 9 states and 11 transitions. [2018-06-26 18:06:14,382 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-26 18:06:14,382 INFO ]: Found error trace [2018-06-26 18:06:14,382 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-26 18:06:14,382 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 18:06:14,382 INFO ]: Analyzing trace with hash -517223681, now seen corresponding path program 1 times [2018-06-26 18:06:14,382 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 18:06:14,382 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 18:06:14,383 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:06:14,383 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 18:06:14,383 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:06:14,391 INFO ]: Conjunction of SSA is unsat [2018-06-26 18:06:14,424 INFO ]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 18:06:14,425 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-26 18:06:14,425 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-26 18:06:14,425 INFO ]: Interpolant automaton has 4 states [2018-06-26 18:06:14,425 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-26 18:06:14,425 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-26 18:06:14,425 INFO ]: Start difference. First operand 9 states and 11 transitions. Second operand 4 states. [2018-06-26 18:06:14,531 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 18:06:14,531 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-26 18:06:14,532 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-26 18:06:14,532 INFO ]: Start accepts. Automaton has 4 states. Word has length 7 [2018-06-26 18:06:14,532 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 18:06:14,533 INFO ]: With dead ends: 9 [2018-06-26 18:06:14,533 INFO ]: Without dead ends: 8 [2018-06-26 18:06:14,533 INFO ]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-06-26 18:06:14,533 INFO ]: Start minimizeSevpa. Operand 8 states. [2018-06-26 18:06:14,534 INFO ]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-06-26 18:06:14,534 INFO ]: Start removeUnreachable. Operand 8 states. [2018-06-26 18:06:14,534 INFO ]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-06-26 18:06:14,534 INFO ]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 7 [2018-06-26 18:06:14,534 INFO ]: Finished accepts. word is rejected. [2018-06-26 18:06:14,534 INFO ]: Abstraction has 8 states and 8 transitions. [2018-06-26 18:06:14,534 INFO ]: Interpolant automaton has 4 states. [2018-06-26 18:06:14,534 INFO ]: Start isEmpty. Operand 8 states and 8 transitions. [2018-06-26 18:06:14,535 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-26 18:06:14,535 INFO ]: Found error trace [2018-06-26 18:06:14,535 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-26 18:06:14,535 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 18:06:14,535 INFO ]: Analyzing trace with hash -516508697, now seen corresponding path program 1 times [2018-06-26 18:06:14,535 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 18:06:14,535 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 18:06:14,536 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:06:14,536 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 18:06:14,536 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:06:14,555 INFO ]: Conjunction of SSA is unsat [2018-06-26 18:06:14,647 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 18:06:14,647 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-26 18:06:14,647 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-26 18:06:14,656 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 18:06:14,682 INFO ]: Conjunction of SSA is unsat [2018-06-26 18:06:14,685 INFO ]: Computing forward predicates... [2018-06-26 18:06:14,916 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 18:06:14,937 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-26 18:06:14,937 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2018-06-26 18:06:14,937 INFO ]: Interpolant automaton has 8 states [2018-06-26 18:06:14,938 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-26 18:06:14,938 INFO ]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-06-26 18:06:14,938 INFO ]: Start difference. First operand 8 states and 8 transitions. Second operand 8 states. [2018-06-26 18:06:14,979 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 18:06:14,979 INFO ]: Finished difference Result 5 states and 5 transitions. [2018-06-26 18:06:14,979 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-26 18:06:14,979 INFO ]: Start accepts. Automaton has 8 states. Word has length 7 [2018-06-26 18:06:14,979 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 18:06:14,979 INFO ]: With dead ends: 5 [2018-06-26 18:06:14,979 INFO ]: Without dead ends: 0 [2018-06-26 18:06:14,980 INFO ]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-06-26 18:06:14,980 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-26 18:06:14,980 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-26 18:06:14,980 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-26 18:06:14,980 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-26 18:06:14,980 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 7 [2018-06-26 18:06:14,980 INFO ]: Finished accepts. word is rejected. [2018-06-26 18:06:14,980 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-26 18:06:14,980 INFO ]: Interpolant automaton has 8 states. [2018-06-26 18:06:14,980 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-26 18:06:14,980 INFO ]: Finished isEmpty. No accepting run. [2018-06-26 18:06:14,982 INFO ]: Did not count any witness invariants because Icfg is not BoogieIcfg [2018-06-26 18:06:14,984 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.06 06:06:14 BasicIcfg [2018-06-26 18:06:14,984 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-26 18:06:14,985 INFO ]: Toolchain (without parser) took 2540.55 ms. Allocated memory was 305.7 MB in the beginning and 325.1 MB in the end (delta: 19.4 MB). Free memory was 260.0 MB in the beginning and 277.0 MB in the end (delta: -16.9 MB). Peak memory consumption was 2.5 MB. Max. memory is 3.6 GB. [2018-06-26 18:06:14,986 INFO ]: SmtParser took 0.06 ms. Allocated memory is still 305.7 MB. Free memory is still 270.1 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-26 18:06:14,986 INFO ]: ChcToBoogie took 63.02 ms. Allocated memory is still 305.7 MB. Free memory was 260.0 MB in the beginning and 258.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-26 18:06:14,987 INFO ]: Boogie Preprocessor took 32.30 ms. Allocated memory is still 305.7 MB. Free memory was 258.0 MB in the beginning and 256.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-26 18:06:14,988 INFO ]: RCFGBuilder took 386.43 ms. Allocated memory is still 305.7 MB. Free memory was 256.0 MB in the beginning and 246.1 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 3.6 GB. [2018-06-26 18:06:14,988 INFO ]: BlockEncodingV2 took 99.13 ms. Allocated memory is still 305.7 MB. Free memory was 246.1 MB in the beginning and 242.1 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 3.6 GB. [2018-06-26 18:06:14,989 INFO ]: TraceAbstraction took 1947.00 ms. Allocated memory was 305.7 MB in the beginning and 325.1 MB in the end (delta: 19.4 MB). Free memory was 242.1 MB in the beginning and 277.0 MB in the end (delta: -34.9 MB). There was no memory consumed. Max. memory is 3.6 GB. [2018-06-26 18:06:14,992 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.plugins.blockencoding: - StatisticsResult: Initial Icfg 12 locations, 24 edges - StatisticsResult: Encoded RCFG 8 locations, 16 edges * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.06 ms. Allocated memory is still 305.7 MB. Free memory is still 270.1 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 63.02 ms. Allocated memory is still 305.7 MB. Free memory was 260.0 MB in the beginning and 258.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 32.30 ms. Allocated memory is still 305.7 MB. Free memory was 258.0 MB in the beginning and 256.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 386.43 ms. Allocated memory is still 305.7 MB. Free memory was 256.0 MB in the beginning and 246.1 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 3.6 GB. * BlockEncodingV2 took 99.13 ms. Allocated memory is still 305.7 MB. Free memory was 246.1 MB in the beginning and 242.1 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 1947.00 ms. Allocated memory was 305.7 MB in the beginning and 325.1 MB in the end (delta: 19.4 MB). Free memory was 242.1 MB in the beginning and 277.0 MB in the end (delta: -34.9 MB). There was no memory consumed. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [UNKNOWN] : assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 8 locations, 1 error locations. SAFE Result, 1.8s OverallTime, 8 OverallIterations, 1 TraceHistogramMax, 0.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 65 SDtfs, 20 SDslu, 66 SDs, 0 SdLazy, 42 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=9occurred in iteration=1, 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, 6 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 60 NumberOfCodeBlocks, 60 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 50 ConstructedInterpolants, 1 QuantifiedInterpolants, 1324 SizeOfPredicates, 10 NumberOfNonLiveVariables, 132 ConjunctsInSsa, 76 ConjunctsInUnsatCore, 10 InterpolantComputations, 7 PerfectInterpolantSequences, 3/6 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/013b-horn.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-GraphSizeCsvProvider-0-2018-06-26_18-06-15-010.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/013b-horn.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-GraphSizeCsvProvider-1-2018-06-26_18-06-15-010.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/013b-horn.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-Benchmark-0-2018-06-26_18-06-15-010.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/013b-horn.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-26_18-06-15-010.csv Received shutdown request...