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/llreve-bench/smt2/loop__nested-while.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-14921ce [2018-06-24 21:42:38,698 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-24 21:42:38,700 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-24 21:42:38,713 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-24 21:42:38,713 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-24 21:42:38,716 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-24 21:42:38,717 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-24 21:42:38,721 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-24 21:42:38,723 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-24 21:42:38,724 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-24 21:42:38,725 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-24 21:42:38,725 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-24 21:42:38,726 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-24 21:42:38,729 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-24 21:42:38,730 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-24 21:42:38,731 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-24 21:42:38,742 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-24 21:42:38,744 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-24 21:42:38,746 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-24 21:42:38,747 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-24 21:42:38,752 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-24 21:42:38,754 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-24 21:42:38,754 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-24 21:42:38,754 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-24 21:42:38,755 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-24 21:42:38,758 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-24 21:42:38,759 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-24 21:42:38,760 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-24 21:42:38,761 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-24 21:42:38,761 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-24 21:42:38,762 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-24 21:42:38,768 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-24 21:42:38,768 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-24 21:42:38,769 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-24 21:42:38,769 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-24 21:42:38,770 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-24 21:42:38,792 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-24 21:42:38,792 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-24 21:42:38,793 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-24 21:42:38,793 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-24 21:42:38,794 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-24 21:42:38,794 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-24 21:42:38,794 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-24 21:42:38,794 INFO L133 SettingsManager]: * Use SBE=true [2018-06-24 21:42:38,795 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-24 21:42:38,796 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-24 21:42:38,796 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-24 21:42:38,796 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-24 21:42:38,796 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-24 21:42:38,796 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-24 21:42:38,797 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-24 21:42:38,797 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-24 21:42:38,797 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-24 21:42:38,797 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-24 21:42:38,797 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-24 21:42:38,797 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-24 21:42:38,798 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-24 21:42:38,800 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-24 21:42:38,800 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-24 21:42:38,848 INFO ]: Repository-Root is: /tmp [2018-06-24 21:42:38,865 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-24 21:42:38,870 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-24 21:42:38,872 INFO ]: Initializing SmtParser... [2018-06-24 21:42:38,872 INFO ]: SmtParser initialized [2018-06-24 21:42:38,872 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/llreve-bench/smt2/loop__nested-while.smt2 [2018-06-24 21:42:38,874 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 [2018-06-24 21:42:38,956 INFO ]: Executing SMT file /storage/chc-comp/llreve-bench/smt2/loop__nested-while.smt2 unknown de.uni_freiburg.informatik.ultimate.plugins.generator.treeautomizer.parsing.HornClauseParserScript$1@3e5a9e9d [2018-06-24 21:42:39,198 INFO ]: Succesfully executed SMT file /storage/chc-comp/llreve-bench/smt2/loop__nested-while.smt2 [2018-06-24 21:42:39,202 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-24 21:42:39,208 INFO ]: Walking toolchain with 5 elements. [2018-06-24 21:42:39,208 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-24 21:42:39,208 INFO ]: Initializing ChcToBoogie... [2018-06-24 21:42:39,209 INFO ]: ChcToBoogie initialized [2018-06-24 21:42:39,212 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 24.06 09:42:39" (1/1) ... [2018-06-24 21:42:39,278 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:42:39 Unit [2018-06-24 21:42:39,278 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-24 21:42:39,279 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-24 21:42:39,279 INFO ]: Initializing Boogie Preprocessor... [2018-06-24 21:42:39,279 INFO ]: Boogie Preprocessor initialized [2018-06-24 21:42:39,300 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:42:39" (1/1) ... [2018-06-24 21:42:39,300 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:42:39" (1/1) ... [2018-06-24 21:42:39,311 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:42:39" (1/1) ... [2018-06-24 21:42:39,312 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:42:39" (1/1) ... [2018-06-24 21:42:39,317 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:42:39" (1/1) ... [2018-06-24 21:42:39,328 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:42:39" (1/1) ... [2018-06-24 21:42:39,329 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:42:39" (1/1) ... [2018-06-24 21:42:39,331 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-24 21:42:39,332 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-24 21:42:39,332 INFO ]: Initializing RCFGBuilder... [2018-06-24 21:42:39,332 INFO ]: RCFGBuilder initialized [2018-06-24 21:42:39,333 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:42:39" (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) [2018-06-24 21:42:39,354 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-24 21:42:39,354 INFO ]: Found specification of procedure gotoProc [2018-06-24 21:42:39,354 INFO ]: Found implementation of procedure gotoProc [2018-06-24 21:42:39,354 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-24 21:42:39,354 INFO ]: Found specification of procedure Ultimate.START [2018-06-24 21:42:39,354 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 [2018-06-24 21:42:39,769 INFO ]: Using library mode [2018-06-24 21:42:39,770 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.06 09:42:39 BoogieIcfgContainer [2018-06-24 21:42:39,770 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-24 21:42:39,770 INFO ]: ------------------------BlockEncodingV2---------------------------- [2018-06-24 21:42:39,770 INFO ]: Initializing BlockEncodingV2... [2018-06-24 21:42:39,771 INFO ]: BlockEncodingV2 initialized [2018-06-24 21:42:39,772 INFO ]: Executing the observer BlockEncodingObserver from plugin BlockEncodingV2 for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.06 09:42:39" (1/1) ... [2018-06-24 21:42:39,789 INFO ]: Initial Icfg 11 locations, 25 edges [2018-06-24 21:42:39,791 INFO ]: Using Remove infeasible edges [2018-06-24 21:42:39,791 INFO ]: Using Maximize final states [2018-06-24 21:42:39,792 INFO ]: Using Minimize states even if more edges are added than removed.=false [2018-06-24 21:42:39,792 INFO ]: Using Minimize states using LBE with the strategy=MULTI [2018-06-24 21:42:39,795 INFO ]: Using Remove sink states [2018-06-24 21:42:39,796 INFO ]: Using Apply optimizations until nothing changes=true [2018-06-24 21:42:39,796 INFO ]: Using Use SBE [2018-06-24 21:42:39,822 INFO ]: SBE split 2 edges [2018-06-24 21:42:39,829 INFO ]: Removed 5 edges and 2 locations because of local infeasibility [2018-06-24 21:42:39,830 INFO ]: 0 new accepting states [2018-06-24 21:42:39,911 INFO ]: Removed 9 edges and 2 locations by large block encoding [2018-06-24 21:42:39,913 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-24 21:42:39,914 INFO ]: Removed 0 edges and 0 locations because of local infeasibility [2018-06-24 21:42:39,914 INFO ]: 0 new accepting states [2018-06-24 21:42:39,914 INFO ]: Removed 0 edges and 0 locations by large block encoding [2018-06-24 21:42:39,914 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-24 21:42:39,914 INFO ]: Encoded RCFG 7 locations, 20 edges [2018-06-24 21:42:39,915 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 24.06 09:42:39 BasicIcfg [2018-06-24 21:42:39,915 INFO ]: ------------------------ END BlockEncodingV2---------------------------- [2018-06-24 21:42:39,916 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-24 21:42:39,916 INFO ]: Initializing TraceAbstraction... [2018-06-24 21:42:39,919 INFO ]: TraceAbstraction initialized [2018-06-24 21:42:39,919 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 24.06 09:42:39" (1/4) ... [2018-06-24 21:42:39,920 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1962d760 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 24.06 09:42:39, skipping insertion in model container [2018-06-24 21:42:39,920 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:42:39" (2/4) ... [2018-06-24 21:42:39,920 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1962d760 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.06 09:42:39, skipping insertion in model container [2018-06-24 21:42:39,920 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.06 09:42:39" (3/4) ... [2018-06-24 21:42:39,921 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1962d760 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.06 09:42:39, skipping insertion in model container [2018-06-24 21:42:39,921 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 24.06 09:42:39" (4/4) ... [2018-06-24 21:42:39,923 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver_BEv2 [2018-06-24 21:42:39,933 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-24 21:42:39,942 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-24 21:42:39,996 INFO ]: Using default assertion order modulation [2018-06-24 21:42:39,996 INFO ]: Interprodecural is true [2018-06-24 21:42:39,996 INFO ]: Hoare is false [2018-06-24 21:42:39,996 INFO ]: Compute interpolants for FPandBP [2018-06-24 21:42:39,996 INFO ]: Backedges is TWOTRACK [2018-06-24 21:42:39,996 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-24 21:42:39,996 INFO ]: Difference is false [2018-06-24 21:42:39,997 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-24 21:42:39,997 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-24 21:42:40,012 INFO ]: Start isEmpty. Operand 7 states. [2018-06-24 21:42:40,028 INFO ]: Finished isEmpty. Found accepting run of length 6 [2018-06-24 21:42:40,028 INFO ]: Found error trace [2018-06-24 21:42:40,029 INFO ]: trace histogram [1, 1, 1, 1, 1] [2018-06-24 21:42:40,029 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:42:40,034 INFO ]: Analyzing trace with hash 42546147, now seen corresponding path program 1 times [2018-06-24 21:42:40,036 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:42:40,036 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:42:40,083 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:42:40,083 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:42:40,083 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:42:40,139 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:42:40,208 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 21:42:40,210 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-24 21:42:40,210 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-24 21:42:40,211 INFO ]: Interpolant automaton has 3 states [2018-06-24 21:42:40,221 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-24 21:42:40,221 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-24 21:42:40,223 INFO ]: Start difference. First operand 7 states. Second operand 3 states. [2018-06-24 21:42:40,432 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:42:40,432 INFO ]: Finished difference Result 8 states and 22 transitions. [2018-06-24 21:42:40,436 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-24 21:42:40,437 INFO ]: Start accepts. Automaton has 3 states. Word has length 5 [2018-06-24 21:42:40,438 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:42:40,451 INFO ]: With dead ends: 8 [2018-06-24 21:42:40,451 INFO ]: Without dead ends: 6 [2018-06-24 21:42:40,455 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 [2018-06-24 21:42:40,482 INFO ]: Start minimizeSevpa. Operand 6 states. [2018-06-24 21:42:40,503 INFO ]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-06-24 21:42:40,505 INFO ]: Start removeUnreachable. Operand 6 states. [2018-06-24 21:42:40,505 INFO ]: Finished removeUnreachable. Reduced from 6 states to 6 states and 10 transitions. [2018-06-24 21:42:40,507 INFO ]: Start accepts. Automaton has 6 states and 10 transitions. Word has length 5 [2018-06-24 21:42:40,507 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:42:40,507 INFO ]: Abstraction has 6 states and 10 transitions. [2018-06-24 21:42:40,507 INFO ]: Interpolant automaton has 3 states. [2018-06-24 21:42:40,507 INFO ]: Start isEmpty. Operand 6 states and 10 transitions. [2018-06-24 21:42:40,507 INFO ]: Finished isEmpty. Found accepting run of length 6 [2018-06-24 21:42:40,507 INFO ]: Found error trace [2018-06-24 21:42:40,507 INFO ]: trace histogram [1, 1, 1, 1, 1] [2018-06-24 21:42:40,507 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:42:40,507 INFO ]: Analyzing trace with hash 42605729, now seen corresponding path program 1 times [2018-06-24 21:42:40,507 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:42:40,508 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:42:40,508 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:42:40,508 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:42:40,508 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:42:40,524 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:42:40,573 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 21:42:40,573 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-24 21:42:40,573 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-24 21:42:40,575 INFO ]: Interpolant automaton has 3 states [2018-06-24 21:42:40,575 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-24 21:42:40,575 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-24 21:42:40,575 INFO ]: Start difference. First operand 6 states and 10 transitions. Second operand 3 states. [2018-06-24 21:42:40,647 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:42:40,647 INFO ]: Finished difference Result 7 states and 14 transitions. [2018-06-24 21:42:40,649 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-24 21:42:40,649 INFO ]: Start accepts. Automaton has 3 states. Word has length 5 [2018-06-24 21:42:40,649 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:42:40,649 INFO ]: With dead ends: 7 [2018-06-24 21:42:40,649 INFO ]: Without dead ends: 7 [2018-06-24 21:42:40,650 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 [2018-06-24 21:42:40,650 INFO ]: Start minimizeSevpa. Operand 7 states. [2018-06-24 21:42:40,652 INFO ]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-06-24 21:42:40,652 INFO ]: Start removeUnreachable. Operand 7 states. [2018-06-24 21:42:40,652 INFO ]: Finished removeUnreachable. Reduced from 7 states to 7 states and 14 transitions. [2018-06-24 21:42:40,652 INFO ]: Start accepts. Automaton has 7 states and 14 transitions. Word has length 5 [2018-06-24 21:42:40,653 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:42:40,653 INFO ]: Abstraction has 7 states and 14 transitions. [2018-06-24 21:42:40,653 INFO ]: Interpolant automaton has 3 states. [2018-06-24 21:42:40,653 INFO ]: Start isEmpty. Operand 7 states and 14 transitions. [2018-06-24 21:42:40,653 INFO ]: Finished isEmpty. Found accepting run of length 6 [2018-06-24 21:42:40,653 INFO ]: Found error trace [2018-06-24 21:42:40,653 INFO ]: trace histogram [1, 1, 1, 1, 1] [2018-06-24 21:42:40,653 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:42:40,653 INFO ]: Analyzing trace with hash 42516356, now seen corresponding path program 1 times [2018-06-24 21:42:40,654 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:42:40,654 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:42:40,655 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:42:40,655 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:42:40,655 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:42:40,668 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:42:40,750 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 21:42:40,751 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-24 21:42:40,751 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-24 21:42:40,751 INFO ]: Interpolant automaton has 3 states [2018-06-24 21:42:40,751 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-24 21:42:40,751 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-24 21:42:40,751 INFO ]: Start difference. First operand 7 states and 14 transitions. Second operand 3 states. [2018-06-24 21:42:40,831 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:42:40,831 INFO ]: Finished difference Result 8 states and 18 transitions. [2018-06-24 21:42:40,831 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-24 21:42:40,831 INFO ]: Start accepts. Automaton has 3 states. Word has length 5 [2018-06-24 21:42:40,831 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:42:40,832 INFO ]: With dead ends: 8 [2018-06-24 21:42:40,832 INFO ]: Without dead ends: 8 [2018-06-24 21:42:40,832 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 [2018-06-24 21:42:40,833 INFO ]: Start minimizeSevpa. Operand 8 states. [2018-06-24 21:42:40,834 INFO ]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-06-24 21:42:40,834 INFO ]: Start removeUnreachable. Operand 8 states. [2018-06-24 21:42:40,834 INFO ]: Finished removeUnreachable. Reduced from 8 states to 8 states and 18 transitions. [2018-06-24 21:42:40,834 INFO ]: Start accepts. Automaton has 8 states and 18 transitions. Word has length 5 [2018-06-24 21:42:40,834 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:42:40,834 INFO ]: Abstraction has 8 states and 18 transitions. [2018-06-24 21:42:40,834 INFO ]: Interpolant automaton has 3 states. [2018-06-24 21:42:40,834 INFO ]: Start isEmpty. Operand 8 states and 18 transitions. [2018-06-24 21:42:40,835 INFO ]: Finished isEmpty. Found accepting run of length 7 [2018-06-24 21:42:40,835 INFO ]: Found error trace [2018-06-24 21:42:40,835 INFO ]: trace histogram [1, 1, 1, 1, 1, 1] [2018-06-24 21:42:40,835 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:42:40,835 INFO ]: Analyzing trace with hash 1320520465, now seen corresponding path program 1 times [2018-06-24 21:42:40,835 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:42:40,835 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:42:40,836 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:42:40,836 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:42:40,836 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:42:40,854 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:42:41,074 WARN ]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-06-24 21:42:41,075 INFO ]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 21:42:41,075 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-24 21:42:41,075 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-24 21:42:41,075 INFO ]: Interpolant automaton has 4 states [2018-06-24 21:42:41,075 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-24 21:42:41,075 INFO ]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-06-24 21:42:41,075 INFO ]: Start difference. First operand 8 states and 18 transitions. Second operand 4 states. [2018-06-24 21:42:41,187 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:42:41,187 INFO ]: Finished difference Result 10 states and 26 transitions. [2018-06-24 21:42:41,187 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-24 21:42:41,187 INFO ]: Start accepts. Automaton has 4 states. Word has length 6 [2018-06-24 21:42:41,187 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:42:41,187 INFO ]: With dead ends: 10 [2018-06-24 21:42:41,188 INFO ]: Without dead ends: 10 [2018-06-24 21:42:41,188 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-06-24 21:42:41,188 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-24 21:42:41,189 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 8. [2018-06-24 21:42:41,189 INFO ]: Start removeUnreachable. Operand 8 states. [2018-06-24 21:42:41,190 INFO ]: Finished removeUnreachable. Reduced from 8 states to 8 states and 18 transitions. [2018-06-24 21:42:41,190 INFO ]: Start accepts. Automaton has 8 states and 18 transitions. Word has length 6 [2018-06-24 21:42:41,190 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:42:41,190 INFO ]: Abstraction has 8 states and 18 transitions. [2018-06-24 21:42:41,190 INFO ]: Interpolant automaton has 4 states. [2018-06-24 21:42:41,190 INFO ]: Start isEmpty. Operand 8 states and 18 transitions. [2018-06-24 21:42:41,190 INFO ]: Finished isEmpty. Found accepting run of length 7 [2018-06-24 21:42:41,190 INFO ]: Found error trace [2018-06-24 21:42:41,190 INFO ]: trace histogram [1, 1, 1, 1, 1, 1] [2018-06-24 21:42:41,190 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:42:41,191 INFO ]: Analyzing trace with hash 1320580047, now seen corresponding path program 1 times [2018-06-24 21:42:41,191 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:42:41,191 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:42:41,191 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:42:41,191 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:42:41,191 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:42:41,202 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:42:41,346 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 21:42:41,347 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:42:41,347 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 [2018-06-24 21:42:41,367 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:42:41,391 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:42:41,397 INFO ]: Computing forward predicates... [2018-06-24 21:42:41,687 INFO ]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 21:42:41,725 INFO ]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-06-24 21:42:41,725 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2018-06-24 21:42:41,726 INFO ]: Interpolant automaton has 6 states [2018-06-24 21:42:41,726 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-24 21:42:41,726 INFO ]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-06-24 21:42:41,726 INFO ]: Start difference. First operand 8 states and 18 transitions. Second operand 6 states. [2018-06-24 21:42:41,954 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:42:41,954 INFO ]: Finished difference Result 9 states and 28 transitions. [2018-06-24 21:42:41,955 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-24 21:42:41,955 INFO ]: Start accepts. Automaton has 6 states. Word has length 6 [2018-06-24 21:42:41,955 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:42:41,955 INFO ]: With dead ends: 9 [2018-06-24 21:42:41,955 INFO ]: Without dead ends: 0 [2018-06-24 21:42:41,955 INFO ]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-06-24 21:42:41,955 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-24 21:42:41,955 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-24 21:42:41,955 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-24 21:42:41,956 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-24 21:42:41,956 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 6 [2018-06-24 21:42:41,956 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:42:41,956 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-24 21:42:41,956 INFO ]: Interpolant automaton has 6 states. [2018-06-24 21:42:41,956 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-24 21:42:41,956 INFO ]: Finished isEmpty. No accepting run. [2018-06-24 21:42:41,958 INFO ]: Did not count any witness invariants because Icfg is not BoogieIcfg [2018-06-24 21:42:41,961 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.06 09:42:41 BasicIcfg [2018-06-24 21:42:41,961 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-24 21:42:41,962 INFO ]: Toolchain (without parser) took 2759.24 ms. Allocated memory was 307.8 MB in the beginning and 326.1 MB in the end (delta: 18.4 MB). Free memory was 261.1 MB in the beginning and 282.4 MB in the end (delta: -21.3 MB). There was no memory consumed. Max. memory is 3.6 GB. [2018-06-24 21:42:41,963 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 307.8 MB. Free memory is still 273.2 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-24 21:42:41,963 INFO ]: ChcToBoogie took 70.12 ms. Allocated memory is still 307.8 MB. Free memory was 261.1 MB in the beginning and 259.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-24 21:42:41,964 INFO ]: Boogie Preprocessor took 52.41 ms. Allocated memory is still 307.8 MB. Free memory was 259.1 MB in the beginning and 257.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-24 21:42:41,965 INFO ]: RCFGBuilder took 437.94 ms. Allocated memory is still 307.8 MB. Free memory was 257.1 MB in the beginning and 244.2 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 3.6 GB. [2018-06-24 21:42:41,965 INFO ]: BlockEncodingV2 took 144.87 ms. Allocated memory is still 307.8 MB. Free memory was 244.2 MB in the beginning and 239.2 MB in the end (delta: 5.0 MB). Peak memory consumption was 5.0 MB. Max. memory is 3.6 GB. [2018-06-24 21:42:41,966 INFO ]: TraceAbstraction took 2045.12 ms. Allocated memory was 307.8 MB in the beginning and 326.1 MB in the end (delta: 18.4 MB). Free memory was 238.2 MB in the beginning and 282.4 MB in the end (delta: -44.2 MB). There was no memory consumed. Max. memory is 3.6 GB. [2018-06-24 21:42:41,972 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.plugins.blockencoding: - StatisticsResult: Initial Icfg 11 locations, 25 edges - StatisticsResult: Encoded RCFG 7 locations, 20 edges * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.07 ms. Allocated memory is still 307.8 MB. Free memory is still 273.2 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 70.12 ms. Allocated memory is still 307.8 MB. Free memory was 261.1 MB in the beginning and 259.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 52.41 ms. Allocated memory is still 307.8 MB. Free memory was 259.1 MB in the beginning and 257.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 437.94 ms. Allocated memory is still 307.8 MB. Free memory was 257.1 MB in the beginning and 244.2 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 3.6 GB. * BlockEncodingV2 took 144.87 ms. Allocated memory is still 307.8 MB. Free memory was 244.2 MB in the beginning and 239.2 MB in the end (delta: 5.0 MB). Peak memory consumption was 5.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 2045.12 ms. Allocated memory was 307.8 MB in the beginning and 326.1 MB in the end (delta: 18.4 MB). Free memory was 238.2 MB in the beginning and 282.4 MB in the end (delta: -44.2 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, 7 locations, 1 error locations. SAFE Result, 1.9s OverallTime, 5 OverallIterations, 1 TraceHistogramMax, 0.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 38 SDtfs, 0 SDslu, 21 SDs, 0 SdLazy, 85 SolverSat, 38 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=8occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 33 NumberOfCodeBlocks, 33 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 27 ConstructedInterpolants, 0 QuantifiedInterpolants, 466 SizeOfPredicates, 4 NumberOfNonLiveVariables, 68 ConjunctsInSsa, 14 ConjunctsInUnsatCore, 6 InterpolantComputations, 5 PerfectInterpolantSequences, 2/3 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/loop__nested-while.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-GraphSizeCsvProvider-0-2018-06-24_21-42-41-991.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/loop__nested-while.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-GraphSizeCsvProvider-1-2018-06-24_21-42-41-991.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/loop__nested-while.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-Benchmark-0-2018-06-24_21-42-41-991.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/loop__nested-while.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-24_21-42-41-991.csv Received shutdown request...