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__break.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-14921ce [2018-06-24 21:42:07,901 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-24 21:42:07,904 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-24 21:42:07,915 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-24 21:42:07,915 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-24 21:42:07,917 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-24 21:42:07,918 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-24 21:42:07,920 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-24 21:42:07,922 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-24 21:42:07,922 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-24 21:42:07,923 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-24 21:42:07,923 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-24 21:42:07,924 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-24 21:42:07,925 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-24 21:42:07,926 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-24 21:42:07,927 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-24 21:42:07,929 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-24 21:42:07,931 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-24 21:42:07,941 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-24 21:42:07,943 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-24 21:42:07,944 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-24 21:42:07,946 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-24 21:42:07,947 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-24 21:42:07,947 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-24 21:42:07,948 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-24 21:42:07,949 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-24 21:42:07,956 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-24 21:42:07,957 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-24 21:42:07,958 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-24 21:42:07,958 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-24 21:42:07,959 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-24 21:42:07,959 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-24 21:42:07,960 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-24 21:42:07,960 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-24 21:42:07,961 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-24 21:42:07,961 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-24 21:42:07,989 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-24 21:42:07,990 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-24 21:42:07,990 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-24 21:42:07,990 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-24 21:42:07,991 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-24 21:42:07,991 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-24 21:42:07,992 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-24 21:42:07,992 INFO L133 SettingsManager]: * Use SBE=true [2018-06-24 21:42:07,992 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-24 21:42:07,992 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-24 21:42:07,993 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-24 21:42:07,993 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-24 21:42:07,993 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-24 21:42:07,993 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-24 21:42:07,993 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-24 21:42:07,993 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-24 21:42:07,994 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-24 21:42:07,994 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-24 21:42:07,994 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-24 21:42:07,996 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-24 21:42:07,996 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-24 21:42:07,997 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-24 21:42:07,998 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-24 21:42:08,045 INFO ]: Repository-Root is: /tmp [2018-06-24 21:42:08,059 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-24 21:42:08,065 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-24 21:42:08,066 INFO ]: Initializing SmtParser... [2018-06-24 21:42:08,067 INFO ]: SmtParser initialized [2018-06-24 21:42:08,067 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/llreve-bench/smt2/loop__break.smt2 [2018-06-24 21:42:08,070 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 21:42:08,164 INFO ]: Executing SMT file /storage/chc-comp/llreve-bench/smt2/loop__break.smt2 unknown de.uni_freiburg.informatik.ultimate.plugins.generator.treeautomizer.parsing.HornClauseParserScript$1@64976ccf [2018-06-24 21:42:08,383 INFO ]: Succesfully executed SMT file /storage/chc-comp/llreve-bench/smt2/loop__break.smt2 [2018-06-24 21:42:08,387 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-24 21:42:08,401 INFO ]: Walking toolchain with 5 elements. [2018-06-24 21:42:08,401 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-24 21:42:08,401 INFO ]: Initializing ChcToBoogie... [2018-06-24 21:42:08,401 INFO ]: ChcToBoogie initialized [2018-06-24 21:42:08,404 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 24.06 09:42:08" (1/1) ... [2018-06-24 21:42:08,460 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:42:08 Unit [2018-06-24 21:42:08,460 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-24 21:42:08,461 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-24 21:42:08,461 INFO ]: Initializing Boogie Preprocessor... [2018-06-24 21:42:08,461 INFO ]: Boogie Preprocessor initialized [2018-06-24 21:42:08,481 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:42:08" (1/1) ... [2018-06-24 21:42:08,481 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:42:08" (1/1) ... [2018-06-24 21:42:08,486 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:42:08" (1/1) ... [2018-06-24 21:42:08,486 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:42:08" (1/1) ... [2018-06-24 21:42:08,490 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:42:08" (1/1) ... [2018-06-24 21:42:08,492 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:42:08" (1/1) ... [2018-06-24 21:42:08,493 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:42:08" (1/1) ... [2018-06-24 21:42:08,495 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-24 21:42:08,496 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-24 21:42:08,496 INFO ]: Initializing RCFGBuilder... [2018-06-24 21:42:08,496 INFO ]: RCFGBuilder initialized [2018-06-24 21:42:08,497 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:42:08" (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 21:42:08,515 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-24 21:42:08,515 INFO ]: Found specification of procedure gotoProc [2018-06-24 21:42:08,515 INFO ]: Found implementation of procedure gotoProc [2018-06-24 21:42:08,515 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-24 21:42:08,515 INFO ]: Found specification of procedure Ultimate.START [2018-06-24 21:42:08,515 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 21:42:08,759 INFO ]: Using library mode [2018-06-24 21:42:08,760 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.06 09:42:08 BoogieIcfgContainer [2018-06-24 21:42:08,760 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-24 21:42:08,760 INFO ]: ------------------------BlockEncodingV2---------------------------- [2018-06-24 21:42:08,760 INFO ]: Initializing BlockEncodingV2... [2018-06-24 21:42:08,761 INFO ]: BlockEncodingV2 initialized [2018-06-24 21:42:08,765 INFO ]: Executing the observer BlockEncodingObserver from plugin BlockEncodingV2 for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.06 09:42:08" (1/1) ... [2018-06-24 21:42:08,781 INFO ]: Initial Icfg 10 locations, 18 edges [2018-06-24 21:42:08,782 INFO ]: Using Remove infeasible edges [2018-06-24 21:42:08,782 INFO ]: Using Maximize final states [2018-06-24 21:42:08,784 INFO ]: Using Minimize states even if more edges are added than removed.=false [2018-06-24 21:42:08,784 INFO ]: Using Minimize states using LBE with the strategy=MULTI [2018-06-24 21:42:08,786 INFO ]: Using Remove sink states [2018-06-24 21:42:08,787 INFO ]: Using Apply optimizations until nothing changes=true [2018-06-24 21:42:08,787 INFO ]: Using Use SBE [2018-06-24 21:42:08,800 INFO ]: SBE split 2 edges [2018-06-24 21:42:08,806 INFO ]: Removed 5 edges and 2 locations because of local infeasibility [2018-06-24 21:42:08,807 INFO ]: 0 new accepting states [2018-06-24 21:42:08,883 INFO ]: Removed 7 edges and 2 locations by large block encoding [2018-06-24 21:42:08,885 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-24 21:42:08,886 INFO ]: Removed 0 edges and 0 locations because of local infeasibility [2018-06-24 21:42:08,886 INFO ]: 0 new accepting states [2018-06-24 21:42:08,886 INFO ]: Removed 0 edges and 0 locations by large block encoding [2018-06-24 21:42:08,887 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-24 21:42:08,887 INFO ]: Encoded RCFG 6 locations, 13 edges [2018-06-24 21:42:08,887 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 24.06 09:42:08 BasicIcfg [2018-06-24 21:42:08,887 INFO ]: ------------------------ END BlockEncodingV2---------------------------- [2018-06-24 21:42:08,888 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-24 21:42:08,888 INFO ]: Initializing TraceAbstraction... [2018-06-24 21:42:08,891 INFO ]: TraceAbstraction initialized [2018-06-24 21:42:08,891 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 24.06 09:42:08" (1/4) ... [2018-06-24 21:42:08,893 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a253d9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 24.06 09:42:08, skipping insertion in model container [2018-06-24 21:42:08,893 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:42:08" (2/4) ... [2018-06-24 21:42:08,894 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a253d9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.06 09:42:08, skipping insertion in model container [2018-06-24 21:42:08,894 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.06 09:42:08" (3/4) ... [2018-06-24 21:42:08,894 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a253d9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.06 09:42:08, skipping insertion in model container [2018-06-24 21:42:08,894 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 24.06 09:42:08" (4/4) ... [2018-06-24 21:42:08,896 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver_BEv2 [2018-06-24 21:42:08,905 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-24 21:42:08,911 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-24 21:42:08,958 INFO ]: Using default assertion order modulation [2018-06-24 21:42:08,959 INFO ]: Interprodecural is true [2018-06-24 21:42:08,959 INFO ]: Hoare is false [2018-06-24 21:42:08,959 INFO ]: Compute interpolants for FPandBP [2018-06-24 21:42:08,959 INFO ]: Backedges is TWOTRACK [2018-06-24 21:42:08,959 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-24 21:42:08,959 INFO ]: Difference is false [2018-06-24 21:42:08,959 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-24 21:42:08,959 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-24 21:42:08,967 INFO ]: Start isEmpty. Operand 6 states. [2018-06-24 21:42:08,976 INFO ]: Finished isEmpty. Found accepting run of length 6 [2018-06-24 21:42:08,977 INFO ]: Found error trace [2018-06-24 21:42:08,977 INFO ]: trace histogram [1, 1, 1, 1, 1] [2018-06-24 21:42:08,978 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:42:08,983 INFO ]: Analyzing trace with hash 33927673, now seen corresponding path program 1 times [2018-06-24 21:42:08,985 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:42:08,986 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:42:09,019 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:42:09,019 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:42:09,019 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:42:09,059 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:42:09,161 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 21:42:09,163 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-24 21:42:09,163 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-24 21:42:09,164 INFO ]: Interpolant automaton has 3 states [2018-06-24 21:42:09,174 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-24 21:42:09,175 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-24 21:42:09,178 INFO ]: Start difference. First operand 6 states. Second operand 3 states. [2018-06-24 21:42:09,372 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:42:09,372 INFO ]: Finished difference Result 7 states and 18 transitions. [2018-06-24 21:42:09,373 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-24 21:42:09,374 INFO ]: Start accepts. Automaton has 3 states. Word has length 5 [2018-06-24 21:42:09,374 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:42:09,382 INFO ]: With dead ends: 7 [2018-06-24 21:42:09,382 INFO ]: Without dead ends: 7 [2018-06-24 21:42:09,384 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 21:42:09,402 INFO ]: Start minimizeSevpa. Operand 7 states. [2018-06-24 21:42:09,420 INFO ]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-06-24 21:42:09,421 INFO ]: Start removeUnreachable. Operand 7 states. [2018-06-24 21:42:09,422 INFO ]: Finished removeUnreachable. Reduced from 7 states to 7 states and 18 transitions. [2018-06-24 21:42:09,423 INFO ]: Start accepts. Automaton has 7 states and 18 transitions. Word has length 5 [2018-06-24 21:42:09,424 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:42:09,424 INFO ]: Abstraction has 7 states and 18 transitions. [2018-06-24 21:42:09,424 INFO ]: Interpolant automaton has 3 states. [2018-06-24 21:42:09,424 INFO ]: Start isEmpty. Operand 7 states and 18 transitions. [2018-06-24 21:42:09,424 INFO ]: Finished isEmpty. Found accepting run of length 6 [2018-06-24 21:42:09,424 INFO ]: Found error trace [2018-06-24 21:42:09,424 INFO ]: trace histogram [1, 1, 1, 1, 1] [2018-06-24 21:42:09,424 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:42:09,425 INFO ]: Analyzing trace with hash 34017046, now seen corresponding path program 1 times [2018-06-24 21:42:09,425 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:42:09,425 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:42:09,426 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:42:09,426 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:42:09,426 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:42:09,436 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:42:09,497 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 21:42:09,497 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-24 21:42:09,497 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-24 21:42:09,499 INFO ]: Interpolant automaton has 3 states [2018-06-24 21:42:09,499 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-24 21:42:09,499 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-24 21:42:09,499 INFO ]: Start difference. First operand 7 states and 18 transitions. Second operand 3 states. [2018-06-24 21:42:09,746 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:42:09,747 INFO ]: Finished difference Result 9 states and 28 transitions. [2018-06-24 21:42:09,747 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-24 21:42:09,747 INFO ]: Start accepts. Automaton has 3 states. Word has length 5 [2018-06-24 21:42:09,747 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:42:09,747 INFO ]: With dead ends: 9 [2018-06-24 21:42:09,747 INFO ]: Without dead ends: 9 [2018-06-24 21:42:09,748 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 21:42:09,748 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-24 21:42:09,750 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 8. [2018-06-24 21:42:09,750 INFO ]: Start removeUnreachable. Operand 8 states. [2018-06-24 21:42:09,750 INFO ]: Finished removeUnreachable. Reduced from 8 states to 8 states and 23 transitions. [2018-06-24 21:42:09,750 INFO ]: Start accepts. Automaton has 8 states and 23 transitions. Word has length 5 [2018-06-24 21:42:09,751 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:42:09,751 INFO ]: Abstraction has 8 states and 23 transitions. [2018-06-24 21:42:09,751 INFO ]: Interpolant automaton has 3 states. [2018-06-24 21:42:09,751 INFO ]: Start isEmpty. Operand 8 states and 23 transitions. [2018-06-24 21:42:09,751 INFO ]: Finished isEmpty. Found accepting run of length 7 [2018-06-24 21:42:09,751 INFO ]: Found error trace [2018-06-24 21:42:09,751 INFO ]: trace histogram [1, 1, 1, 1, 1, 1] [2018-06-24 21:42:09,751 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:42:09,751 INFO ]: Analyzing trace with hash 1051379696, now seen corresponding path program 1 times [2018-06-24 21:42:09,751 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:42:09,751 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:42:09,752 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:42:09,752 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:42:09,752 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:42:09,768 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:42:09,981 WARN ]: Spent 109.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2018-06-24 21:42:09,982 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 21:42:09,982 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:42:09,982 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-06-24 21:42:09,998 INFO ]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-24 21:42:10,036 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:42:10,043 INFO ]: Computing forward predicates... [2018-06-24 21:42:10,128 INFO ]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-24 21:42:10,148 INFO ]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-06-24 21:42:10,148 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2018-06-24 21:42:10,148 INFO ]: Interpolant automaton has 5 states [2018-06-24 21:42:10,148 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-24 21:42:10,149 INFO ]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-06-24 21:42:10,149 INFO ]: Start difference. First operand 8 states and 23 transitions. Second operand 5 states. [2018-06-24 21:42:10,463 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:42:10,464 INFO ]: Finished difference Result 16 states and 63 transitions. [2018-06-24 21:42:10,464 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-24 21:42:10,464 INFO ]: Start accepts. Automaton has 5 states. Word has length 6 [2018-06-24 21:42:10,464 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:42:10,465 INFO ]: With dead ends: 16 [2018-06-24 21:42:10,465 INFO ]: Without dead ends: 16 [2018-06-24 21:42:10,465 INFO ]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-06-24 21:42:10,465 INFO ]: Start minimizeSevpa. Operand 16 states. [2018-06-24 21:42:10,467 INFO ]: Finished minimizeSevpa. Reduced states from 16 to 10. [2018-06-24 21:42:10,467 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-24 21:42:10,468 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 33 transitions. [2018-06-24 21:42:10,468 INFO ]: Start accepts. Automaton has 10 states and 33 transitions. Word has length 6 [2018-06-24 21:42:10,468 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:42:10,468 INFO ]: Abstraction has 10 states and 33 transitions. [2018-06-24 21:42:10,468 INFO ]: Interpolant automaton has 5 states. [2018-06-24 21:42:10,468 INFO ]: Start isEmpty. Operand 10 states and 33 transitions. [2018-06-24 21:42:10,468 INFO ]: Finished isEmpty. Found accepting run of length 7 [2018-06-24 21:42:10,468 INFO ]: Found error trace [2018-06-24 21:42:10,468 INFO ]: trace histogram [1, 1, 1, 1, 1, 1] [2018-06-24 21:42:10,468 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:42:10,469 INFO ]: Analyzing trace with hash 1054150259, now seen corresponding path program 1 times [2018-06-24 21:42:10,469 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:42:10,469 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:42:10,469 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:42:10,469 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:42:10,469 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:42:10,477 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:42:10,499 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 21:42:10,592 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:42:10,592 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-24 21:42:10,601 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:42:10,610 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:42:10,611 INFO ]: Computing forward predicates... [2018-06-24 21:42:10,629 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 21:42:10,648 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-24 21:42:10,648 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-24 21:42:10,648 INFO ]: Interpolant automaton has 5 states [2018-06-24 21:42:10,649 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-24 21:42:10,649 INFO ]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-06-24 21:42:10,649 INFO ]: Start difference. First operand 10 states and 33 transitions. Second operand 5 states. [2018-06-24 21:42:10,862 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:42:10,862 INFO ]: Finished difference Result 22 states and 93 transitions. [2018-06-24 21:42:10,863 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-24 21:42:10,863 INFO ]: Start accepts. Automaton has 5 states. Word has length 6 [2018-06-24 21:42:10,863 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:42:10,864 INFO ]: With dead ends: 22 [2018-06-24 21:42:10,864 INFO ]: Without dead ends: 22 [2018-06-24 21:42:10,864 INFO ]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-06-24 21:42:10,864 INFO ]: Start minimizeSevpa. Operand 22 states. [2018-06-24 21:42:10,866 INFO ]: Finished minimizeSevpa. Reduced states from 22 to 15. [2018-06-24 21:42:10,866 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-24 21:42:10,867 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 58 transitions. [2018-06-24 21:42:10,867 INFO ]: Start accepts. Automaton has 15 states and 58 transitions. Word has length 6 [2018-06-24 21:42:10,867 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:42:10,867 INFO ]: Abstraction has 15 states and 58 transitions. [2018-06-24 21:42:10,867 INFO ]: Interpolant automaton has 5 states. [2018-06-24 21:42:10,867 INFO ]: Start isEmpty. Operand 15 states and 58 transitions. [2018-06-24 21:42:10,868 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-24 21:42:10,868 INFO ]: Found error trace [2018-06-24 21:42:10,868 INFO ]: trace histogram [2, 1, 1, 1, 1, 1] [2018-06-24 21:42:10,868 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:42:10,868 INFO ]: Analyzing trace with hash -1738716808, now seen corresponding path program 1 times [2018-06-24 21:42:10,868 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:42:10,868 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:42:10,869 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:42:10,869 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:42:10,869 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:42:10,878 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:42:11,000 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 21:42:11,000 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:42:11,000 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-24 21:42:11,007 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:42:11,018 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:42:11,020 INFO ]: Computing forward predicates... [2018-06-24 21:42:11,029 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 21:42:11,049 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-24 21:42:11,049 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-06-24 21:42:11,049 INFO ]: Interpolant automaton has 5 states [2018-06-24 21:42:11,050 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-24 21:42:11,050 INFO ]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-06-24 21:42:11,050 INFO ]: Start difference. First operand 15 states and 58 transitions. Second operand 5 states. [2018-06-24 21:42:11,338 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:42:11,338 INFO ]: Finished difference Result 36 states and 163 transitions. [2018-06-24 21:42:11,339 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-24 21:42:11,339 INFO ]: Start accepts. Automaton has 5 states. Word has length 7 [2018-06-24 21:42:11,339 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:42:11,340 INFO ]: With dead ends: 36 [2018-06-24 21:42:11,340 INFO ]: Without dead ends: 36 [2018-06-24 21:42:11,341 INFO ]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-06-24 21:42:11,341 INFO ]: Start minimizeSevpa. Operand 36 states. [2018-06-24 21:42:11,344 INFO ]: Finished minimizeSevpa. Reduced states from 36 to 22. [2018-06-24 21:42:11,344 INFO ]: Start removeUnreachable. Operand 22 states. [2018-06-24 21:42:11,345 INFO ]: Finished removeUnreachable. Reduced from 22 states to 22 states and 93 transitions. [2018-06-24 21:42:11,345 INFO ]: Start accepts. Automaton has 22 states and 93 transitions. Word has length 7 [2018-06-24 21:42:11,345 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:42:11,345 INFO ]: Abstraction has 22 states and 93 transitions. [2018-06-24 21:42:11,345 INFO ]: Interpolant automaton has 5 states. [2018-06-24 21:42:11,345 INFO ]: Start isEmpty. Operand 22 states and 93 transitions. [2018-06-24 21:42:11,346 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-24 21:42:11,346 INFO ]: Found error trace [2018-06-24 21:42:11,346 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-06-24 21:42:11,346 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:42:11,346 INFO ]: Analyzing trace with hash 1218246858, now seen corresponding path program 1 times [2018-06-24 21:42:11,346 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:42:11,346 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:42:11,347 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:42:11,347 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:42:11,347 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:42:11,360 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:42:11,525 INFO ]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-24 21:42:11,525 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:42:11,525 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 [2018-06-24 21:42:11,534 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:42:11,558 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:42:11,561 INFO ]: Computing forward predicates... [2018-06-24 21:42:11,653 INFO ]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 21:42:11,674 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-24 21:42:11,674 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2018-06-24 21:42:11,674 INFO ]: Interpolant automaton has 9 states [2018-06-24 21:42:11,674 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-24 21:42:11,674 INFO ]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2018-06-24 21:42:11,674 INFO ]: Start difference. First operand 22 states and 93 transitions. Second operand 9 states. [2018-06-24 21:42:12,079 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:42:12,079 INFO ]: Finished difference Result 72 states and 308 transitions. [2018-06-24 21:42:12,080 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-06-24 21:42:12,080 INFO ]: Start accepts. Automaton has 9 states. Word has length 8 [2018-06-24 21:42:12,080 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:42:12,081 INFO ]: With dead ends: 72 [2018-06-24 21:42:12,081 INFO ]: Without dead ends: 21 [2018-06-24 21:42:12,081 INFO ]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2018-06-24 21:42:12,081 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-24 21:42:12,083 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 20. [2018-06-24 21:42:12,083 INFO ]: Start removeUnreachable. Operand 20 states. [2018-06-24 21:42:12,085 INFO ]: Finished removeUnreachable. Reduced from 20 states to 20 states and 63 transitions. [2018-06-24 21:42:12,085 INFO ]: Start accepts. Automaton has 20 states and 63 transitions. Word has length 8 [2018-06-24 21:42:12,085 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:42:12,085 INFO ]: Abstraction has 20 states and 63 transitions. [2018-06-24 21:42:12,085 INFO ]: Interpolant automaton has 9 states. [2018-06-24 21:42:12,085 INFO ]: Start isEmpty. Operand 20 states and 63 transitions. [2018-06-24 21:42:12,085 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-24 21:42:12,085 INFO ]: Found error trace [2018-06-24 21:42:12,085 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-06-24 21:42:12,085 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:42:12,085 INFO ]: Analyzing trace with hash -2131958455, now seen corresponding path program 1 times [2018-06-24 21:42:12,086 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:42:12,086 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:42:12,087 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:42:12,087 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:42:12,087 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:42:12,110 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:42:12,205 INFO ]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 21:42:12,205 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:42:12,206 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 [2018-06-24 21:42:12,213 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:42:12,234 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:42:12,235 INFO ]: Computing forward predicates... [2018-06-24 21:42:12,294 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 21:42:12,313 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-24 21:42:12,313 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2018-06-24 21:42:12,313 INFO ]: Interpolant automaton has 10 states [2018-06-24 21:42:12,313 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-24 21:42:12,313 INFO ]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2018-06-24 21:42:12,314 INFO ]: Start difference. First operand 20 states and 63 transitions. Second operand 10 states. [2018-06-24 21:42:12,644 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:42:12,644 INFO ]: Finished difference Result 35 states and 123 transitions. [2018-06-24 21:42:12,645 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-06-24 21:42:12,645 INFO ]: Start accepts. Automaton has 10 states. Word has length 8 [2018-06-24 21:42:12,646 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:42:12,646 INFO ]: With dead ends: 35 [2018-06-24 21:42:12,646 INFO ]: Without dead ends: 0 [2018-06-24 21:42:12,646 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2018-06-24 21:42:12,646 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-24 21:42:12,646 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-24 21:42:12,646 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-24 21:42:12,646 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-24 21:42:12,646 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 8 [2018-06-24 21:42:12,646 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:42:12,646 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-24 21:42:12,646 INFO ]: Interpolant automaton has 10 states. [2018-06-24 21:42:12,646 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-24 21:42:12,646 INFO ]: Finished isEmpty. No accepting run. [2018-06-24 21:42:12,649 INFO ]: Did not count any witness invariants because Icfg is not BoogieIcfg [2018-06-24 21:42:12,652 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.06 09:42:12 BasicIcfg [2018-06-24 21:42:12,652 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-24 21:42:12,653 INFO ]: Toolchain (without parser) took 4265.20 ms. Allocated memory was 308.3 MB in the beginning and 337.1 MB in the end (delta: 28.8 MB). Free memory was 262.6 MB in the beginning and 311.2 MB in the end (delta: -48.6 MB). There was no memory consumed. Max. memory is 3.6 GB. [2018-06-24 21:42:12,654 INFO ]: SmtParser took 0.08 ms. Allocated memory is still 308.3 MB. Free memory is still 271.8 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-24 21:42:12,654 INFO ]: ChcToBoogie took 59.22 ms. Allocated memory is still 308.3 MB. Free memory was 261.7 MB in the beginning and 259.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-24 21:42:12,655 INFO ]: Boogie Preprocessor took 34.53 ms. Allocated memory is still 308.3 MB. Free memory was 259.7 MB in the beginning and 258.7 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. [2018-06-24 21:42:12,657 INFO ]: RCFGBuilder took 264.41 ms. Allocated memory is still 308.3 MB. Free memory was 258.7 MB in the beginning and 249.7 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 3.6 GB. [2018-06-24 21:42:12,657 INFO ]: BlockEncodingV2 took 126.77 ms. Allocated memory is still 308.3 MB. Free memory was 249.7 MB in the beginning and 246.7 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. [2018-06-24 21:42:12,658 INFO ]: TraceAbstraction took 3763.89 ms. Allocated memory was 308.3 MB in the beginning and 337.1 MB in the end (delta: 28.8 MB). Free memory was 245.7 MB in the beginning and 311.2 MB in the end (delta: -65.5 MB). There was no memory consumed. Max. memory is 3.6 GB. [2018-06-24 21:42:12,664 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.plugins.blockencoding: - StatisticsResult: Initial Icfg 10 locations, 18 edges - StatisticsResult: Encoded RCFG 6 locations, 13 edges * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.08 ms. Allocated memory is still 308.3 MB. Free memory is still 271.8 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 59.22 ms. Allocated memory is still 308.3 MB. Free memory was 261.7 MB in the beginning and 259.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 34.53 ms. Allocated memory is still 308.3 MB. Free memory was 259.7 MB in the beginning and 258.7 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. * RCFGBuilder took 264.41 ms. Allocated memory is still 308.3 MB. Free memory was 258.7 MB in the beginning and 249.7 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 3.6 GB. * BlockEncodingV2 took 126.77 ms. Allocated memory is still 308.3 MB. Free memory was 249.7 MB in the beginning and 246.7 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 3763.89 ms. Allocated memory was 308.3 MB in the beginning and 337.1 MB in the end (delta: 28.8 MB). Free memory was 245.7 MB in the beginning and 311.2 MB in the end (delta: -65.5 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, 6 locations, 1 error locations. SAFE Result, 3.7s OverallTime, 7 OverallIterations, 2 TraceHistogramMax, 2.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 55 SDtfs, 0 SDslu, 43 SDs, 0 SdLazy, 257 SolverSat, 179 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 76 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 29 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 80 NumberOfCodeBlocks, 80 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 68 ConstructedInterpolants, 0 QuantifiedInterpolants, 1651 SizeOfPredicates, 9 NumberOfNonLiveVariables, 341 ConjunctsInSsa, 64 ConjunctsInUnsatCore, 12 InterpolantComputations, 3 PerfectInterpolantSequences, 4/34 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__break.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-GraphSizeCsvProvider-0-2018-06-24_21-42-12-681.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/loop__break.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-GraphSizeCsvProvider-1-2018-06-24_21-42-12-681.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/loop__break.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-Benchmark-0-2018-06-24_21-42-12-681.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/loop__break.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-24_21-42-12-681.csv Received shutdown request...