java -Xss4m -Xmx4000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCHC_wBE.xml --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf -i /storage/chc-comp/vmt-chc-benchmarks/cav12/simple_array_inversion-2.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-62c3406-m [2018-06-26 20:51:20,015 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-26 20:51:20,017 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-26 20:51:20,032 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-26 20:51:20,033 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-26 20:51:20,033 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-26 20:51:20,034 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-26 20:51:20,040 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-26 20:51:20,042 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-26 20:51:20,043 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-26 20:51:20,045 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-26 20:51:20,045 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-26 20:51:20,046 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-26 20:51:20,046 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-26 20:51:20,048 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-26 20:51:20,051 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-26 20:51:20,052 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-26 20:51:20,053 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-26 20:51:20,063 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-26 20:51:20,064 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-26 20:51:20,065 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-26 20:51:20,066 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-26 20:51:20,071 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-06-26 20:51:20,081 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-26 20:51:20,099 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-26 20:51:20,099 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-26 20:51:20,099 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-26 20:51:20,099 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-26 20:51:20,103 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-26 20:51:20,103 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-26 20:51:20,103 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-26 20:51:20,103 INFO L133 SettingsManager]: * Use SBE=true [2018-06-26 20:51:20,104 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-26 20:51:20,104 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-26 20:51:20,104 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-26 20:51:20,104 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-26 20:51:20,104 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-26 20:51:20,105 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-26 20:51:20,105 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-26 20:51:20,105 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-26 20:51:20,105 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-26 20:51:20,105 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-26 20:51:20,105 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-26 20:51:20,106 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-26 20:51:20,106 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-26 20:51:20,108 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-26 20:51:20,108 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-26 20:51:20,154 INFO ]: Repository-Root is: /tmp [2018-06-26 20:51:20,165 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-26 20:51:20,169 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-26 20:51:20,170 INFO ]: Initializing SmtParser... [2018-06-26 20:51:20,170 INFO ]: SmtParser initialized [2018-06-26 20:51:20,171 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/cav12/simple_array_inversion-2.smt2 [2018-06-26 20:51:20,172 INFO ]: Parsing .smt2 file as a set of Horn Clauses No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-06-26 20:51:20,266 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/simple_array_inversion-2.smt2 unknown [2018-06-26 20:51:20,758 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/simple_array_inversion-2.smt2 [2018-06-26 20:51:20,762 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-26 20:51:20,776 INFO ]: Walking toolchain with 5 elements. [2018-06-26 20:51:20,777 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-26 20:51:20,777 INFO ]: Initializing ChcToBoogie... [2018-06-26 20:51:20,777 INFO ]: ChcToBoogie initialized [2018-06-26 20:51:20,780 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 26.06 08:51:20" (1/1) ... [2018-06-26 20:51:20,884 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 08:51:20 Unit [2018-06-26 20:51:20,884 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-26 20:51:20,885 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-26 20:51:20,885 INFO ]: Initializing Boogie Preprocessor... [2018-06-26 20:51:20,885 INFO ]: Boogie Preprocessor initialized [2018-06-26 20:51:20,906 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 08:51:20" (1/1) ... [2018-06-26 20:51:20,907 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 08:51:20" (1/1) ... [2018-06-26 20:51:20,927 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 08:51:20" (1/1) ... [2018-06-26 20:51:20,928 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 08:51:20" (1/1) ... [2018-06-26 20:51:20,946 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 08:51:20" (1/1) ... [2018-06-26 20:51:20,948 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 08:51:20" (1/1) ... [2018-06-26 20:51:20,951 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 08:51:20" (1/1) ... [2018-06-26 20:51:20,962 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-26 20:51:20,963 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-26 20:51:20,963 INFO ]: Initializing RCFGBuilder... [2018-06-26 20:51:20,963 INFO ]: RCFGBuilder initialized [2018-06-26 20:51:20,964 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 08:51:20" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2018-06-26 20:51:20,980 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-26 20:51:20,980 INFO ]: Found specification of procedure gotoProc [2018-06-26 20:51:20,980 INFO ]: Found implementation of procedure gotoProc [2018-06-26 20:51:20,980 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-26 20:51:20,981 INFO ]: Found specification of procedure Ultimate.START [2018-06-26 20:51:20,981 INFO ]: Found implementation of procedure Ultimate.START Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-26 20:51:21,301 INFO ]: Using library mode [2018-06-26 20:51:21,305 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.06 08:51:21 BoogieIcfgContainer [2018-06-26 20:51:21,306 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-26 20:51:21,306 INFO ]: ------------------------BlockEncodingV2---------------------------- [2018-06-26 20:51:21,306 INFO ]: Initializing BlockEncodingV2... [2018-06-26 20:51:21,307 INFO ]: BlockEncodingV2 initialized [2018-06-26 20:51:21,307 INFO ]: Executing the observer BlockEncodingObserver from plugin BlockEncodingV2 for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.06 08:51:21" (1/1) ... [2018-06-26 20:51:21,324 INFO ]: Initial Icfg 10 locations, 10 edges [2018-06-26 20:51:21,325 INFO ]: Using Remove infeasible edges [2018-06-26 20:51:21,326 INFO ]: Using Maximize final states [2018-06-26 20:51:21,327 INFO ]: Using Minimize states even if more edges are added than removed.=false [2018-06-26 20:51:21,327 INFO ]: Using Minimize states using LBE with the strategy=MULTI [2018-06-26 20:51:21,329 INFO ]: Using Remove sink states [2018-06-26 20:51:21,329 INFO ]: Using Apply optimizations until nothing changes=true [2018-06-26 20:51:21,330 INFO ]: Using Use SBE [2018-06-26 20:51:32,308 INFO ]: SBE split 1 edges [2018-06-26 20:51:38,105 INFO ]: Removed 2 edges and 2 locations because of local infeasibility [2018-06-26 20:51:38,113 INFO ]: 0 new accepting states [2018-06-26 20:51:38,182 INFO ]: Removed 4 edges and 2 locations by large block encoding [2018-06-26 20:51:38,188 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-26 20:51:51,591 INFO ]: Removed 0 edges and 0 locations because of local infeasibility [2018-06-26 20:51:51,595 INFO ]: 0 new accepting states [2018-06-26 20:51:51,601 INFO ]: Removed 0 edges and 0 locations by large block encoding [2018-06-26 20:51:51,602 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-26 20:52:10,586 INFO ]: Encoded RCFG 6 locations, 9348 edges [2018-06-26 20:52:10,586 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 26.06 08:52:10 BasicIcfg [2018-06-26 20:52:10,586 INFO ]: ------------------------ END BlockEncodingV2---------------------------- [2018-06-26 20:52:10,587 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-26 20:52:10,588 INFO ]: Initializing TraceAbstraction... [2018-06-26 20:52:10,590 INFO ]: TraceAbstraction initialized [2018-06-26 20:52:10,591 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 26.06 08:51:20" (1/4) ... [2018-06-26 20:52:10,594 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7de2fbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 26.06 08:52:10, skipping insertion in model container [2018-06-26 20:52:10,595 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 08:51:20" (2/4) ... [2018-06-26 20:52:10,595 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7de2fbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.06 08:52:10, skipping insertion in model container [2018-06-26 20:52:10,595 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.06 08:51:21" (3/4) ... [2018-06-26 20:52:10,595 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7de2fbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.06 08:52:10, skipping insertion in model container [2018-06-26 20:52:10,595 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 26.06 08:52:10" (4/4) ... [2018-06-26 20:52:10,597 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver_BEv2 [2018-06-26 20:52:10,605 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-26 20:52:10,626 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-26 20:52:10,660 INFO ]: Using default assertion order modulation [2018-06-26 20:52:10,661 INFO ]: Interprodecural is true [2018-06-26 20:52:10,661 INFO ]: Hoare is false [2018-06-26 20:52:10,661 INFO ]: Compute interpolants for FPandBP [2018-06-26 20:52:10,661 INFO ]: Backedges is TWOTRACK [2018-06-26 20:52:10,661 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-26 20:52:10,661 INFO ]: Difference is false [2018-06-26 20:52:10,661 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-26 20:52:10,661 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-26 20:52:10,699 INFO ]: Start isEmpty. Operand 6 states. [2018-06-26 20:52:10,744 INFO ]: Finished isEmpty. Found accepting run of length 6 [2018-06-26 20:52:10,744 INFO ]: Found error trace [2018-06-26 20:52:10,745 INFO ]: trace histogram [1, 1, 1, 1, 1] [2018-06-26 20:52:10,745 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 20:52:10,750 INFO ]: Analyzing trace with hash 322718498, now seen corresponding path program 1 times [2018-06-26 20:52:10,752 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 20:52:10,752 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 20:52:10,798 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 20:52:10,798 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 20:52:10,798 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 20:52:10,867 INFO ]: Conjunction of SSA is unsat [2018-06-26 20:52:10,994 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 20:52:10,997 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-26 20:52:10,997 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-26 20:52:10,998 INFO ]: Interpolant automaton has 3 states [2018-06-26 20:52:11,008 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-26 20:52:11,009 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-26 20:52:11,010 INFO ]: Start difference. First operand 6 states. Second operand 3 states. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown