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/bk-nat.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-14921ce [2018-06-25 00:46:53,433 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-25 00:46:53,435 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-25 00:46:53,447 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-25 00:46:53,447 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-25 00:46:53,448 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-25 00:46:53,450 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-25 00:46:53,454 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-25 00:46:53,457 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-25 00:46:53,458 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-25 00:46:53,459 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-25 00:46:53,459 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-25 00:46:53,460 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-25 00:46:53,463 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-25 00:46:53,464 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-25 00:46:53,464 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-25 00:46:53,477 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-25 00:46:53,479 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-25 00:46:53,480 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-25 00:46:53,481 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-25 00:46:53,482 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-25 00:46:53,484 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-06-25 00:46:53,492 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-25 00:46:53,498 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-25 00:46:53,499 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-25 00:46:53,499 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-25 00:46:53,500 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-25 00:46:53,501 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-25 00:46:53,501 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-25 00:46:53,521 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-25 00:46:53,522 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-25 00:46:53,522 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-25 00:46:53,522 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-25 00:46:53,523 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-25 00:46:53,523 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-25 00:46:53,524 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-25 00:46:53,524 INFO L133 SettingsManager]: * Use SBE=true [2018-06-25 00:46:53,524 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-25 00:46:53,524 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-25 00:46:53,524 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-25 00:46:53,525 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-25 00:46:53,525 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-25 00:46:53,525 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-25 00:46:53,525 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-25 00:46:53,525 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-25 00:46:53,526 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-25 00:46:53,526 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-25 00:46:53,526 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-25 00:46:53,526 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-25 00:46:53,526 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-25 00:46:53,527 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-25 00:46:53,528 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-25 00:46:53,585 INFO ]: Repository-Root is: /tmp [2018-06-25 00:46:53,604 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-25 00:46:53,609 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-25 00:46:53,611 INFO ]: Initializing SmtParser... [2018-06-25 00:46:53,611 INFO ]: SmtParser initialized [2018-06-25 00:46:53,611 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/bk-nat.c.smt2 [2018-06-25 00:46:53,613 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 00:46:53,704 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/bk-nat.c.smt2 unknown [2018-06-25 00:46:54,090 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/bk-nat.c.smt2 [2018-06-25 00:46:54,095 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-25 00:46:54,101 INFO ]: Walking toolchain with 5 elements. [2018-06-25 00:46:54,101 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-25 00:46:54,101 INFO ]: Initializing ChcToBoogie... [2018-06-25 00:46:54,102 INFO ]: ChcToBoogie initialized [2018-06-25 00:46:54,106 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 12:46:54" (1/1) ... [2018-06-25 00:46:54,163 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:46:54 Unit [2018-06-25 00:46:54,163 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-25 00:46:54,163 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-25 00:46:54,163 INFO ]: Initializing Boogie Preprocessor... [2018-06-25 00:46:54,163 INFO ]: Boogie Preprocessor initialized [2018-06-25 00:46:54,183 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:46:54" (1/1) ... [2018-06-25 00:46:54,184 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:46:54" (1/1) ... [2018-06-25 00:46:54,202 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:46:54" (1/1) ... [2018-06-25 00:46:54,202 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:46:54" (1/1) ... [2018-06-25 00:46:54,218 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:46:54" (1/1) ... [2018-06-25 00:46:54,219 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:46:54" (1/1) ... [2018-06-25 00:46:54,221 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:46:54" (1/1) ... [2018-06-25 00:46:54,228 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-25 00:46:54,228 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-25 00:46:54,228 INFO ]: Initializing RCFGBuilder... [2018-06-25 00:46:54,228 INFO ]: RCFGBuilder initialized [2018-06-25 00:46:54,229 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:46:54" (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) [2018-06-25 00:46:54,245 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-25 00:46:54,245 INFO ]: Found specification of procedure gotoProc [2018-06-25 00:46:54,245 INFO ]: Found implementation of procedure gotoProc [2018-06-25 00:46:54,245 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-25 00:46:54,245 INFO ]: Found specification of procedure Ultimate.START [2018-06-25 00:46:54,245 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 [2018-06-25 00:46:54,520 INFO ]: Using library mode [2018-06-25 00:46:54,521 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 12:46:54 BoogieIcfgContainer [2018-06-25 00:46:54,521 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-25 00:46:54,521 INFO ]: ------------------------BlockEncodingV2---------------------------- [2018-06-25 00:46:54,521 INFO ]: Initializing BlockEncodingV2... [2018-06-25 00:46:54,522 INFO ]: BlockEncodingV2 initialized [2018-06-25 00:46:54,523 INFO ]: Executing the observer BlockEncodingObserver from plugin BlockEncodingV2 for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 12:46:54" (1/1) ... [2018-06-25 00:46:54,537 INFO ]: Initial Icfg 10 locations, 10 edges [2018-06-25 00:46:54,538 INFO ]: Using Remove infeasible edges [2018-06-25 00:46:54,539 INFO ]: Using Maximize final states [2018-06-25 00:46:54,539 INFO ]: Using Minimize states even if more edges are added than removed.=false [2018-06-25 00:46:54,539 INFO ]: Using Minimize states using LBE with the strategy=MULTI [2018-06-25 00:46:54,541 INFO ]: Using Remove sink states [2018-06-25 00:46:54,542 INFO ]: Using Apply optimizations until nothing changes=true [2018-06-25 00:46:54,542 INFO ]: Using Use SBE [2018-06-25 00:46:54,547 WARN ]: expecting exponential blowup for input size 7 [2018-06-25 00:46:54,635 WARN ]: aborting because of expected exponential blowup for input size 70 [2018-06-25 00:46:54,647 WARN ]: aborting because of expected exponential blowup for input size 70 [2018-06-25 00:46:54,647 INFO ]: SBE split 1 edges [2018-06-25 00:46:54,655 INFO ]: Removed 2 edges and 2 locations because of local infeasibility [2018-06-25 00:46:54,657 INFO ]: 0 new accepting states [2018-06-25 00:46:54,783 INFO ]: Removed 8 edges and 2 locations by large block encoding [2018-06-25 00:46:54,785 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-25 00:46:54,786 INFO ]: Removed 0 edges and 0 locations because of local infeasibility [2018-06-25 00:46:54,786 INFO ]: 0 new accepting states [2018-06-25 00:46:54,786 INFO ]: Removed 0 edges and 0 locations by large block encoding [2018-06-25 00:46:54,786 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-25 00:46:54,787 INFO ]: Encoded RCFG 6 locations, 10 edges [2018-06-25 00:46:54,787 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 25.06 12:46:54 BasicIcfg [2018-06-25 00:46:54,787 INFO ]: ------------------------ END BlockEncodingV2---------------------------- [2018-06-25 00:46:54,788 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-25 00:46:54,788 INFO ]: Initializing TraceAbstraction... [2018-06-25 00:46:54,792 INFO ]: TraceAbstraction initialized [2018-06-25 00:46:54,792 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 12:46:54" (1/4) ... [2018-06-25 00:46:54,793 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a2801e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 25.06 12:46:54, skipping insertion in model container [2018-06-25 00:46:54,793 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:46:54" (2/4) ... [2018-06-25 00:46:54,793 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a2801e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.06 12:46:54, skipping insertion in model container [2018-06-25 00:46:54,793 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 12:46:54" (3/4) ... [2018-06-25 00:46:54,794 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a2801e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.06 12:46:54, skipping insertion in model container [2018-06-25 00:46:54,794 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 25.06 12:46:54" (4/4) ... [2018-06-25 00:46:54,795 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver_BEv2 [2018-06-25 00:46:54,806 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-25 00:46:54,814 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-25 00:46:54,861 INFO ]: Using default assertion order modulation [2018-06-25 00:46:54,862 INFO ]: Interprodecural is true [2018-06-25 00:46:54,862 INFO ]: Hoare is false [2018-06-25 00:46:54,862 INFO ]: Compute interpolants for FPandBP [2018-06-25 00:46:54,862 INFO ]: Backedges is TWOTRACK [2018-06-25 00:46:54,862 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-25 00:46:54,862 INFO ]: Difference is false [2018-06-25 00:46:54,862 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-25 00:46:54,862 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-25 00:46:54,873 INFO ]: Start isEmpty. Operand 6 states. [2018-06-25 00:46:54,885 INFO ]: Finished isEmpty. Found accepting run of length 6 [2018-06-25 00:46:54,885 INFO ]: Found error trace [2018-06-25 00:46:54,886 INFO ]: trace histogram [1, 1, 1, 1, 1] [2018-06-25 00:46:54,886 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 00:46:54,889 INFO ]: Analyzing trace with hash 35589957, now seen corresponding path program 1 times [2018-06-25 00:46:54,891 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 00:46:54,891 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 00:46:54,928 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 00:46:54,929 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 00:46:54,929 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 00:46:54,965 INFO ]: Conjunction of SSA is unsat [2018-06-25 00:46:55,023 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 00:46:55,024 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-25 00:46:55,024 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-25 00:46:55,026 INFO ]: Interpolant automaton has 3 states [2018-06-25 00:46:55,036 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-25 00:46:55,037 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 00:46:55,039 INFO ]: Start difference. First operand 6 states. Second operand 3 states. [2018-06-25 00:46:55,194 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 00:46:55,194 INFO ]: Finished difference Result 7 states and 11 transitions. [2018-06-25 00:46:55,198 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-25 00:46:55,199 INFO ]: Start accepts. Automaton has 3 states. Word has length 5 [2018-06-25 00:46:55,200 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 00:46:55,214 INFO ]: With dead ends: 7 [2018-06-25 00:46:55,214 INFO ]: Without dead ends: 7 [2018-06-25 00:46:55,216 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 00:46:55,231 INFO ]: Start minimizeSevpa. Operand 7 states. [2018-06-25 00:46:55,246 INFO ]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-06-25 00:46:55,249 INFO ]: Start removeUnreachable. Operand 7 states. [2018-06-25 00:46:55,250 INFO ]: Finished removeUnreachable. Reduced from 7 states to 7 states and 11 transitions. [2018-06-25 00:46:55,251 INFO ]: Start accepts. Automaton has 7 states and 11 transitions. Word has length 5 [2018-06-25 00:46:55,253 INFO ]: Finished accepts. word is rejected. [2018-06-25 00:46:55,253 INFO ]: Abstraction has 7 states and 11 transitions. [2018-06-25 00:46:55,253 INFO ]: Interpolant automaton has 3 states. [2018-06-25 00:46:55,253 INFO ]: Start isEmpty. Operand 7 states and 11 transitions. [2018-06-25 00:46:55,253 INFO ]: Finished isEmpty. Found accepting run of length 6 [2018-06-25 00:46:55,254 INFO ]: Found error trace [2018-06-25 00:46:55,254 INFO ]: trace histogram [1, 1, 1, 1, 1] [2018-06-25 00:46:55,254 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 00:46:55,254 INFO ]: Analyzing trace with hash 35679330, now seen corresponding path program 1 times [2018-06-25 00:46:55,254 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 00:46:55,254 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 00:46:55,255 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 00:46:55,255 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 00:46:55,255 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 00:46:55,263 INFO ]: Conjunction of SSA is unsat [2018-06-25 00:46:55,329 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 00:46:55,330 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-25 00:46:55,330 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-25 00:46:55,331 INFO ]: Interpolant automaton has 3 states [2018-06-25 00:46:55,331 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-25 00:46:55,331 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 00:46:55,331 INFO ]: Start difference. First operand 7 states and 11 transitions. Second operand 3 states. [2018-06-25 00:46:55,441 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 00:46:55,441 INFO ]: Finished difference Result 8 states and 12 transitions. [2018-06-25 00:46:55,442 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-25 00:46:55,442 INFO ]: Start accepts. Automaton has 3 states. Word has length 5 [2018-06-25 00:46:55,442 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 00:46:55,443 INFO ]: With dead ends: 8 [2018-06-25 00:46:55,443 INFO ]: Without dead ends: 8 [2018-06-25 00:46:55,443 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 00:46:55,444 INFO ]: Start minimizeSevpa. Operand 8 states. [2018-06-25 00:46:55,444 INFO ]: Finished minimizeSevpa. Reduced states from 8 to 7. [2018-06-25 00:46:55,445 INFO ]: Start removeUnreachable. Operand 7 states. [2018-06-25 00:46:55,445 INFO ]: Finished removeUnreachable. Reduced from 7 states to 7 states and 11 transitions. [2018-06-25 00:46:55,445 INFO ]: Start accepts. Automaton has 7 states and 11 transitions. Word has length 5 [2018-06-25 00:46:55,445 INFO ]: Finished accepts. word is rejected. [2018-06-25 00:46:55,445 INFO ]: Abstraction has 7 states and 11 transitions. [2018-06-25 00:46:55,445 INFO ]: Interpolant automaton has 3 states. [2018-06-25 00:46:55,445 INFO ]: Start isEmpty. Operand 7 states and 11 transitions. [2018-06-25 00:46:55,445 INFO ]: Finished isEmpty. Found accepting run of length 7 [2018-06-25 00:46:55,445 INFO ]: Found error trace [2018-06-25 00:46:55,445 INFO ]: trace histogram [1, 1, 1, 1, 1, 1] [2018-06-25 00:46:55,445 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 00:46:55,446 INFO ]: Analyzing trace with hash 1102763159, now seen corresponding path program 1 times [2018-06-25 00:46:55,446 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 00:46:55,446 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 00:46:55,446 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 00:46:55,446 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 00:46:55,446 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 00:46:55,527 INFO ]: Conjunction of SSA is unsat [2018-06-25 00:46:55,704 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 00:46:55,704 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 00:46:55,704 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 00:46:55,711 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 00:46:55,797 INFO ]: Conjunction of SSA is unsat [2018-06-25 00:46:55,806 INFO ]: Computing forward predicates... [2018-06-25 00:46:56,781 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 00:46:56,800 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 00:46:56,800 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-25 00:46:56,801 INFO ]: Interpolant automaton has 5 states [2018-06-25 00:46:56,801 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-25 00:46:56,801 INFO ]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-06-25 00:46:56,801 INFO ]: Start difference. First operand 7 states and 11 transitions. Second operand 5 states. [2018-06-25 00:46:57,104 WARN ]: Spent 181.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 10 [2018-06-25 00:46:57,142 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 00:46:57,142 INFO ]: Finished difference Result 10 states and 14 transitions. [2018-06-25 00:46:57,142 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-25 00:46:57,142 INFO ]: Start accepts. Automaton has 5 states. Word has length 6 [2018-06-25 00:46:57,143 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 00:46:57,143 INFO ]: With dead ends: 10 [2018-06-25 00:46:57,143 INFO ]: Without dead ends: 10 [2018-06-25 00:46:57,143 INFO ]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-06-25 00:46:57,143 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-25 00:46:57,144 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 8. [2018-06-25 00:46:57,145 INFO ]: Start removeUnreachable. Operand 8 states. [2018-06-25 00:46:57,145 INFO ]: Finished removeUnreachable. Reduced from 8 states to 8 states and 12 transitions. [2018-06-25 00:46:57,145 INFO ]: Start accepts. Automaton has 8 states and 12 transitions. Word has length 6 [2018-06-25 00:46:57,145 INFO ]: Finished accepts. word is rejected. [2018-06-25 00:46:57,145 INFO ]: Abstraction has 8 states and 12 transitions. [2018-06-25 00:46:57,145 INFO ]: Interpolant automaton has 5 states. [2018-06-25 00:46:57,145 INFO ]: Start isEmpty. Operand 8 states and 12 transitions. [2018-06-25 00:46:57,145 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-25 00:46:57,145 INFO ]: Found error trace [2018-06-25 00:46:57,145 INFO ]: trace histogram [2, 1, 1, 1, 1, 1] [2018-06-25 00:46:57,146 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 00:46:57,146 INFO ]: Analyzing trace with hash -174605947, now seen corresponding path program 2 times [2018-06-25 00:46:57,146 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 00:46:57,146 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 00:46:57,147 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 00:46:57,147 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 00:46:57,147 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 00:46:57,213 INFO ]: Conjunction of SSA is unsat [2018-06-25 00:46:57,464 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 00:46:57,464 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 00:46:57,464 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-06-25 00:46:57,481 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 00:46:57,586 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-25 00:46:57,586 INFO ]: Conjunction of SSA is unsat [2018-06-25 00:46:57,588 INFO ]: Computing forward predicates... [2018-06-25 00:46:58,879 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 00:46:58,909 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 00:46:58,909 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-06-25 00:46:58,909 INFO ]: Interpolant automaton has 6 states [2018-06-25 00:46:58,909 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-25 00:46:58,909 INFO ]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-06-25 00:46:58,910 INFO ]: Start difference. First operand 8 states and 12 transitions. Second operand 6 states. [2018-06-25 00:46:59,090 WARN ]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2018-06-25 00:47:00,142 WARN ]: Spent 878.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 11 [2018-06-25 00:47:00,289 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 00:47:00,289 INFO ]: Finished difference Result 12 states and 16 transitions. [2018-06-25 00:47:00,290 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-25 00:47:00,290 INFO ]: Start accepts. Automaton has 6 states. Word has length 7 [2018-06-25 00:47:00,290 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 00:47:00,290 INFO ]: With dead ends: 12 [2018-06-25 00:47:00,290 INFO ]: Without dead ends: 12 [2018-06-25 00:47:00,291 INFO ]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2018-06-25 00:47:00,291 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-25 00:47:00,292 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 9. [2018-06-25 00:47:00,292 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-25 00:47:00,292 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 13 transitions. [2018-06-25 00:47:00,292 INFO ]: Start accepts. Automaton has 9 states and 13 transitions. Word has length 7 [2018-06-25 00:47:00,292 INFO ]: Finished accepts. word is rejected. [2018-06-25 00:47:00,292 INFO ]: Abstraction has 9 states and 13 transitions. [2018-06-25 00:47:00,292 INFO ]: Interpolant automaton has 6 states. [2018-06-25 00:47:00,292 INFO ]: Start isEmpty. Operand 9 states and 13 transitions. [2018-06-25 00:47:00,293 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-25 00:47:00,293 INFO ]: Found error trace [2018-06-25 00:47:00,293 INFO ]: trace histogram [2, 1, 1, 1, 1, 1] [2018-06-25 00:47:00,293 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 00:47:00,293 INFO ]: Analyzing trace with hash -88718494, now seen corresponding path program 1 times [2018-06-25 00:47:00,293 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 00:47:00,293 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 00:47:00,294 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 00:47:00,294 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 00:47:00,294 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 00:47:00,336 INFO ]: Conjunction of SSA is unsat [2018-06-25 00:47:00,993 WARN ]: Spent 498.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 7 [2018-06-25 00:47:01,253 WARN ]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-06-25 00:47:01,254 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 00:47:01,254 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 00:47:01,254 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) [2018-06-25 00:47:01,269 INFO ]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 00:47:01,328 INFO ]: Conjunction of SSA is unsat [2018-06-25 00:47:01,331 INFO ]: Computing forward predicates... [2018-06-25 00:47:04,090 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 00:47:04,109 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 00:47:04,109 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-06-25 00:47:04,109 INFO ]: Interpolant automaton has 6 states [2018-06-25 00:47:04,109 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-25 00:47:04,109 INFO ]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-06-25 00:47:04,110 INFO ]: Start difference. First operand 9 states and 13 transitions. Second operand 6 states. [2018-06-25 00:47:04,312 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 00:47:04,312 INFO ]: Finished difference Result 12 states and 16 transitions. [2018-06-25 00:47:04,312 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-25 00:47:04,312 INFO ]: Start accepts. Automaton has 6 states. Word has length 7 [2018-06-25 00:47:04,312 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 00:47:04,313 INFO ]: With dead ends: 12 [2018-06-25 00:47:04,313 INFO ]: Without dead ends: 12 [2018-06-25 00:47:04,313 INFO ]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2018-06-25 00:47:04,313 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-25 00:47:04,316 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 9. [2018-06-25 00:47:04,316 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-25 00:47:04,316 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 13 transitions. [2018-06-25 00:47:04,316 INFO ]: Start accepts. Automaton has 9 states and 13 transitions. Word has length 7 [2018-06-25 00:47:04,316 INFO ]: Finished accepts. word is rejected. [2018-06-25 00:47:04,316 INFO ]: Abstraction has 9 states and 13 transitions. [2018-06-25 00:47:04,316 INFO ]: Interpolant automaton has 6 states. [2018-06-25 00:47:04,316 INFO ]: Start isEmpty. Operand 9 states and 13 transitions. [2018-06-25 00:47:04,316 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-25 00:47:04,316 INFO ]: Found error trace [2018-06-25 00:47:04,316 INFO ]: trace histogram [3, 1, 1, 1, 1, 1] [2018-06-25 00:47:04,316 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 00:47:04,316 INFO ]: Analyzing trace with hash -1118342569, now seen corresponding path program 3 times [2018-06-25 00:47:04,316 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 00:47:04,316 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 00:47:04,317 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 00:47:04,317 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 00:47:04,317 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 00:47:04,378 INFO ]: Conjunction of SSA is unsat [2018-06-25 00:47:05,102 WARN ]: Spent 503.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 11 [2018-06-25 00:47:05,139 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 00:47:05,139 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 00:47:05,139 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 00:47:05,148 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-25 00:47:05,232 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-25 00:47:05,232 INFO ]: Conjunction of SSA is unsat [2018-06-25 00:47:05,284 INFO ]: Computing forward predicates... [2018-06-25 00:47:15,695 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 00:47:15,716 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 00:47:15,728 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 00:47:15,737 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 00:47:15,747 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 00:47:15,768 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 00:47:15,794 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 00:47:15,814 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 00:47:15,845 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 00:47:15,853 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 00:47:36,013 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 00:47:37,428 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 00:47:37,448 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 00:47:37,494 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-06-25 00:47:37,494 INFO ]: Interpolant automaton has 7 states [2018-06-25 00:47:37,494 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-25 00:47:37,495 INFO ]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-06-25 00:47:37,495 INFO ]: Start difference. First operand 9 states and 13 transitions. Second operand 7 states. [2018-06-25 00:47:37,628 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 00:47:37,628 INFO ]: Finished difference Result 14 states and 18 transitions. [2018-06-25 00:47:37,628 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-25 00:47:37,628 INFO ]: Start accepts. Automaton has 7 states. Word has length 8 [2018-06-25 00:47:37,628 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 00:47:37,629 INFO ]: With dead ends: 14 [2018-06-25 00:47:37,629 INFO ]: Without dead ends: 14 [2018-06-25 00:47:37,629 INFO ]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2018-06-25 00:47:37,629 INFO ]: Start minimizeSevpa. Operand 14 states. [2018-06-25 00:47:37,631 INFO ]: Finished minimizeSevpa. Reduced states from 14 to 10. [2018-06-25 00:47:37,631 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-25 00:47:37,631 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 14 transitions. [2018-06-25 00:47:37,631 INFO ]: Start accepts. Automaton has 10 states and 14 transitions. Word has length 8 [2018-06-25 00:47:37,631 INFO ]: Finished accepts. word is rejected. [2018-06-25 00:47:37,631 INFO ]: Abstraction has 10 states and 14 transitions. [2018-06-25 00:47:37,631 INFO ]: Interpolant automaton has 7 states. [2018-06-25 00:47:37,631 INFO ]: Start isEmpty. Operand 10 states and 14 transitions. [2018-06-25 00:47:37,631 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-25 00:47:37,632 INFO ]: Found error trace [2018-06-25 00:47:37,632 INFO ]: trace histogram [3, 1, 1, 1, 1, 1] [2018-06-25 00:47:37,632 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 00:47:37,632 INFO ]: Analyzing trace with hash 1544168474, now seen corresponding path program 2 times [2018-06-25 00:47:37,632 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 00:47:37,632 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 00:47:37,632 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 00:47:37,632 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 00:47:37,632 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 00:47:37,676 INFO ]: Conjunction of SSA is unsat [2018-06-25 00:47:37,817 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 00:47:37,817 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 00:47:37,817 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 00:47:37,826 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-25 00:47:37,871 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-25 00:47:37,871 INFO ]: Conjunction of SSA is unsat [2018-06-25 00:47:37,874 INFO ]: Computing forward predicates... Received shutdown request... [2018-06-25 00:48:00,985 INFO ]: Timeout while computing interpolants [2018-06-25 00:48:01,186 WARN ]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 00:48:01,186 WARN ]: Verification canceled [2018-06-25 00:48:01,188 INFO ]: Did not count any witness invariants because Icfg is not BoogieIcfg [2018-06-25 00:48:01,190 WARN ]: Timeout [2018-06-25 00:48:01,190 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.06 12:48:01 BasicIcfg [2018-06-25 00:48:01,190 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-25 00:48:01,191 INFO ]: Toolchain (without parser) took 67095.05 ms. Allocated memory was 306.2 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 252.7 MB in the beginning and 401.1 MB in the end (delta: -148.3 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-25 00:48:01,191 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 306.2 MB. Free memory is still 271.8 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-25 00:48:01,192 INFO ]: ChcToBoogie took 61.57 ms. Allocated memory is still 306.2 MB. Free memory was 252.7 MB in the beginning and 249.8 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. [2018-06-25 00:48:01,192 INFO ]: Boogie Preprocessor took 64.68 ms. Allocated memory is still 306.2 MB. Free memory was 249.8 MB in the beginning and 248.8 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. [2018-06-25 00:48:01,195 INFO ]: RCFGBuilder took 292.75 ms. Allocated memory is still 306.2 MB. Free memory was 248.8 MB in the beginning and 234.2 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.5 MB. Max. memory is 3.6 GB. [2018-06-25 00:48:01,195 INFO ]: BlockEncodingV2 took 265.62 ms. Allocated memory is still 306.2 MB. Free memory was 234.2 MB in the beginning and 220.3 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 3.6 GB. [2018-06-25 00:48:01,196 INFO ]: TraceAbstraction took 66401.78 ms. Allocated memory was 306.2 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 220.3 MB in the beginning and 401.1 MB in the end (delta: -180.8 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-25 00:48:01,208 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, 10 edges * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.07 ms. Allocated memory is still 306.2 MB. Free memory is still 271.8 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 61.57 ms. Allocated memory is still 306.2 MB. Free memory was 252.7 MB in the beginning and 249.8 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 64.68 ms. Allocated memory is still 306.2 MB. Free memory was 249.8 MB in the beginning and 248.8 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. * RCFGBuilder took 292.75 ms. Allocated memory is still 306.2 MB. Free memory was 248.8 MB in the beginning and 234.2 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.5 MB. Max. memory is 3.6 GB. * BlockEncodingV2 took 265.62 ms. Allocated memory is still 306.2 MB. Free memory was 234.2 MB in the beginning and 220.3 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 66401.78 ms. Allocated memory was 306.2 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 220.3 MB in the beginning and 401.1 MB in the end (delta: -180.8 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 PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations, while XnfDer was eliminating 9984 quantified variables from 13 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 6 locations, 1 error locations. TIMEOUT Result, 66.3s OverallTime, 7 OverallIterations, 3 TraceHistogramMax, 2.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 54 SDtfs, 0 SDslu, 54 SDs, 0 SdLazy, 60 SolverSat, 47 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 60 GetRequests, 24 SyntacticMatches, 8 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 3.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10occurred 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, 6 MinimizatonAttempts, 13 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 39.4s InterpolantComputationTime, 66 NumberOfCodeBlocks, 66 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 56 ConstructedInterpolants, 0 QuantifiedInterpolants, 1158 SizeOfPredicates, 24 NumberOfNonLiveVariables, 824 ConjunctsInSsa, 101 ConjunctsInUnsatCore, 10 InterpolantComputations, 2 PerfectInterpolantSequences, 0/26 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/bk-nat.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-GraphSizeCsvProvider-0-2018-06-25_00-48-01-228.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/bk-nat.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-GraphSizeCsvProvider-1-2018-06-25_00-48-01-228.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/bk-nat.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-Benchmark-0-2018-06-25_00-48-01-228.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/bk-nat.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-25_00-48-01-228.csv Completed graceful shutdown