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/hopv/lia/mochi/enc-rev_accum.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-14921ce [2018-06-24 21:15:50,255 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-24 21:15:50,257 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-24 21:15:50,270 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-24 21:15:50,271 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-24 21:15:50,272 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-24 21:15:50,273 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-24 21:15:50,274 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-24 21:15:50,276 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-24 21:15:50,276 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-24 21:15:50,277 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-24 21:15:50,277 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-24 21:15:50,280 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-24 21:15:50,281 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-24 21:15:50,282 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-24 21:15:50,283 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-24 21:15:50,287 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-24 21:15:50,288 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-24 21:15:50,301 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-24 21:15:50,302 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-24 21:15:50,303 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-24 21:15:50,305 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-24 21:15:50,306 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-24 21:15:50,306 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-24 21:15:50,307 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-24 21:15:50,307 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-24 21:15:50,308 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-24 21:15:50,309 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-24 21:15:50,311 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-24 21:15:50,311 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-24 21:15:50,311 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-24 21:15:50,312 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-24 21:15:50,312 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-24 21:15:50,313 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-24 21:15:50,313 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-24 21:15:50,314 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-24 21:15:50,344 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-24 21:15:50,344 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-24 21:15:50,344 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-24 21:15:50,344 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-24 21:15:50,345 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-24 21:15:50,345 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-24 21:15:50,346 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-24 21:15:50,346 INFO L133 SettingsManager]: * Use SBE=true [2018-06-24 21:15:50,346 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-24 21:15:50,346 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-24 21:15:50,346 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-24 21:15:50,347 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-24 21:15:50,347 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-24 21:15:50,347 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-24 21:15:50,347 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-24 21:15:50,347 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-24 21:15:50,348 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-24 21:15:50,348 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-24 21:15:50,348 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-24 21:15:50,348 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-24 21:15:50,348 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-24 21:15:50,351 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-24 21:15:50,351 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-24 21:15:50,385 INFO ]: Repository-Root is: /tmp [2018-06-24 21:15:50,398 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-24 21:15:50,401 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-24 21:15:50,402 INFO ]: Initializing SmtParser... [2018-06-24 21:15:50,402 INFO ]: SmtParser initialized [2018-06-24 21:15:50,403 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/hopv/lia/mochi/enc-rev_accum.smt2 [2018-06-24 21:15:50,404 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 21:15:50,494 INFO ]: Executing SMT file /storage/chc-comp/hopv/lia/mochi/enc-rev_accum.smt2 unknown [2018-06-24 21:15:50,645 INFO ]: Succesfully executed SMT file /storage/chc-comp/hopv/lia/mochi/enc-rev_accum.smt2 [2018-06-24 21:15:50,651 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-24 21:15:50,659 INFO ]: Walking toolchain with 5 elements. [2018-06-24 21:15:50,660 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-24 21:15:50,660 INFO ]: Initializing ChcToBoogie... [2018-06-24 21:15:50,660 INFO ]: ChcToBoogie initialized [2018-06-24 21:15:50,663 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 24.06 09:15:50" (1/1) ... [2018-06-24 21:15:50,716 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:15:50 Unit [2018-06-24 21:15:50,717 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-24 21:15:50,717 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-24 21:15:50,717 INFO ]: Initializing Boogie Preprocessor... [2018-06-24 21:15:50,717 INFO ]: Boogie Preprocessor initialized [2018-06-24 21:15:50,737 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:15:50" (1/1) ... [2018-06-24 21:15:50,738 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:15:50" (1/1) ... [2018-06-24 21:15:50,743 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:15:50" (1/1) ... [2018-06-24 21:15:50,743 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:15:50" (1/1) ... [2018-06-24 21:15:50,745 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:15:50" (1/1) ... [2018-06-24 21:15:50,747 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:15:50" (1/1) ... [2018-06-24 21:15:50,748 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:15:50" (1/1) ... [2018-06-24 21:15:50,749 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-24 21:15:50,749 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-24 21:15:50,749 INFO ]: Initializing RCFGBuilder... [2018-06-24 21:15:50,749 INFO ]: RCFGBuilder initialized [2018-06-24 21:15:50,751 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:15:50" (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 21:15:50,765 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-24 21:15:50,765 INFO ]: Found specification of procedure gotoProc [2018-06-24 21:15:50,765 INFO ]: Found implementation of procedure gotoProc [2018-06-24 21:15:50,765 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-24 21:15:50,765 INFO ]: Found specification of procedure Ultimate.START [2018-06-24 21:15:50,765 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 21:15:50,927 INFO ]: Using library mode [2018-06-24 21:15:50,927 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.06 09:15:50 BoogieIcfgContainer [2018-06-24 21:15:50,927 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-24 21:15:50,929 INFO ]: ------------------------BlockEncodingV2---------------------------- [2018-06-24 21:15:50,929 INFO ]: Initializing BlockEncodingV2... [2018-06-24 21:15:50,930 INFO ]: BlockEncodingV2 initialized [2018-06-24 21:15:50,931 INFO ]: Executing the observer BlockEncodingObserver from plugin BlockEncodingV2 for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.06 09:15:50" (1/1) ... [2018-06-24 21:15:50,949 INFO ]: Initial Icfg 10 locations, 11 edges [2018-06-24 21:15:50,951 INFO ]: Using Remove infeasible edges [2018-06-24 21:15:50,951 INFO ]: Using Maximize final states [2018-06-24 21:15:50,952 INFO ]: Using Minimize states even if more edges are added than removed.=false [2018-06-24 21:15:50,952 INFO ]: Using Minimize states using LBE with the strategy=MULTI [2018-06-24 21:15:50,953 INFO ]: Using Remove sink states [2018-06-24 21:15:50,954 INFO ]: Using Apply optimizations until nothing changes=true [2018-06-24 21:15:50,954 INFO ]: Using Use SBE [2018-06-24 21:15:50,960 INFO ]: SBE split 0 edges [2018-06-24 21:15:50,965 INFO ]: Removed 3 edges and 2 locations because of local infeasibility [2018-06-24 21:15:50,966 INFO ]: 0 new accepting states [2018-06-24 21:15:50,982 INFO ]: Removed 4 edges and 2 locations by large block encoding [2018-06-24 21:15:50,984 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-24 21:15:50,991 INFO ]: Removed 0 edges and 0 locations because of local infeasibility [2018-06-24 21:15:50,991 INFO ]: 0 new accepting states [2018-06-24 21:15:50,992 INFO ]: Removed 0 edges and 0 locations by large block encoding [2018-06-24 21:15:50,992 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-24 21:15:50,992 INFO ]: Encoded RCFG 6 locations, 6 edges [2018-06-24 21:15:50,992 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 24.06 09:15:50 BasicIcfg [2018-06-24 21:15:50,992 INFO ]: ------------------------ END BlockEncodingV2---------------------------- [2018-06-24 21:15:50,994 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-24 21:15:50,994 INFO ]: Initializing TraceAbstraction... [2018-06-24 21:15:50,998 INFO ]: TraceAbstraction initialized [2018-06-24 21:15:50,998 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 24.06 09:15:50" (1/4) ... [2018-06-24 21:15:50,999 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49a1eb5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 24.06 09:15:50, skipping insertion in model container [2018-06-24 21:15:50,999 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:15:50" (2/4) ... [2018-06-24 21:15:50,999 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49a1eb5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.06 09:15:50, skipping insertion in model container [2018-06-24 21:15:50,999 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.06 09:15:50" (3/4) ... [2018-06-24 21:15:51,000 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49a1eb5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.06 09:15:51, skipping insertion in model container [2018-06-24 21:15:51,001 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 24.06 09:15:50" (4/4) ... [2018-06-24 21:15:51,002 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver_BEv2 [2018-06-24 21:15:51,012 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-24 21:15:51,020 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-24 21:15:51,053 INFO ]: Using default assertion order modulation [2018-06-24 21:15:51,053 INFO ]: Interprodecural is true [2018-06-24 21:15:51,054 INFO ]: Hoare is false [2018-06-24 21:15:51,054 INFO ]: Compute interpolants for FPandBP [2018-06-24 21:15:51,054 INFO ]: Backedges is TWOTRACK [2018-06-24 21:15:51,054 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-24 21:15:51,054 INFO ]: Difference is false [2018-06-24 21:15:51,054 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-24 21:15:51,054 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-24 21:15:51,063 INFO ]: Start isEmpty. Operand 6 states. [2018-06-24 21:15:51,077 INFO ]: Finished isEmpty. Found accepting run of length 6 [2018-06-24 21:15:51,078 INFO ]: Found error trace [2018-06-24 21:15:51,078 INFO ]: trace histogram [1, 1, 1, 1, 1] [2018-06-24 21:15:51,079 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:15:51,090 INFO ]: Analyzing trace with hash 35433345, now seen corresponding path program 1 times [2018-06-24 21:15:51,092 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:15:51,093 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:15:51,129 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:15:51,130 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:15:51,130 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:15:51,167 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:15:51,487 WARN ]: Spent 237.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 11 [2018-06-24 21:15:51,491 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 21:15:51,492 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-24 21:15:51,492 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-24 21:15:51,493 INFO ]: Interpolant automaton has 3 states [2018-06-24 21:15:51,506 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-24 21:15:51,507 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-24 21:15:51,510 INFO ]: Start difference. First operand 6 states. Second operand 3 states. [2018-06-24 21:15:51,590 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:15:51,590 INFO ]: Finished difference Result 7 states and 7 transitions. [2018-06-24 21:15:51,591 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-24 21:15:51,592 INFO ]: Start accepts. Automaton has 3 states. Word has length 5 [2018-06-24 21:15:51,592 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:15:51,598 INFO ]: With dead ends: 7 [2018-06-24 21:15:51,598 INFO ]: Without dead ends: 7 [2018-06-24 21:15:51,600 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-24 21:15:51,613 INFO ]: Start minimizeSevpa. Operand 7 states. [2018-06-24 21:15:51,631 INFO ]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-06-24 21:15:51,633 INFO ]: Start removeUnreachable. Operand 7 states. [2018-06-24 21:15:51,633 INFO ]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-06-24 21:15:51,634 INFO ]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-06-24 21:15:51,635 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:15:51,635 INFO ]: Abstraction has 7 states and 7 transitions. [2018-06-24 21:15:51,635 INFO ]: Interpolant automaton has 3 states. [2018-06-24 21:15:51,635 INFO ]: Start isEmpty. Operand 7 states and 7 transitions. [2018-06-24 21:15:51,635 INFO ]: Finished isEmpty. Found accepting run of length 7 [2018-06-24 21:15:51,635 INFO ]: Found error trace [2018-06-24 21:15:51,635 INFO ]: trace histogram [1, 1, 1, 1, 1, 1] [2018-06-24 21:15:51,635 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:15:51,635 INFO ]: Analyzing trace with hash 1098108106, now seen corresponding path program 1 times [2018-06-24 21:15:51,635 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:15:51,635 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:15:51,636 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:15:51,636 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:15:51,636 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:15:51,649 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:15:51,832 WARN ]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-06-24 21:15:51,958 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 21:15:51,958 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:15:51,958 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 21:15:51,965 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:15:51,983 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:15:51,989 INFO ]: Computing forward predicates... [2018-06-24 21:15:52,107 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 21:15:52,130 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-24 21:15:52,130 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-06-24 21:15:52,131 INFO ]: Interpolant automaton has 6 states [2018-06-24 21:15:52,131 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-24 21:15:52,131 INFO ]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-06-24 21:15:52,131 INFO ]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2018-06-24 21:15:52,423 WARN ]: Spent 220.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 14 [2018-06-24 21:15:52,507 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:15:52,507 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-24 21:15:52,508 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-24 21:15:52,508 INFO ]: Start accepts. Automaton has 6 states. Word has length 6 [2018-06-24 21:15:52,508 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:15:52,508 INFO ]: With dead ends: 9 [2018-06-24 21:15:52,508 INFO ]: Without dead ends: 9 [2018-06-24 21:15:52,509 INFO ]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-06-24 21:15:52,509 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-24 21:15:52,510 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-24 21:15:52,510 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-24 21:15:52,510 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-24 21:15:52,510 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-06-24 21:15:52,510 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:15:52,510 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-24 21:15:52,510 INFO ]: Interpolant automaton has 6 states. [2018-06-24 21:15:52,511 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-24 21:15:52,511 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-24 21:15:52,511 INFO ]: Found error trace [2018-06-24 21:15:52,511 INFO ]: trace histogram [3, 1, 1, 1, 1, 1] [2018-06-24 21:15:52,511 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:15:52,511 INFO ]: Analyzing trace with hash -1290483798, now seen corresponding path program 2 times [2018-06-24 21:15:52,511 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:15:52,511 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:15:52,512 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:15:52,512 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:15:52,512 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:15:52,532 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:15:52,672 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 21:15:52,673 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:15:52,673 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 21:15:52,679 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-24 21:15:52,697 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-24 21:15:52,697 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:15:52,699 INFO ]: Computing forward predicates... [2018-06-24 21:15:52,930 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 21:15:52,949 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-24 21:15:52,949 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2018-06-24 21:15:52,949 INFO ]: Interpolant automaton has 10 states [2018-06-24 21:15:52,949 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-24 21:15:52,950 INFO ]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2018-06-24 21:15:52,950 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 10 states. [2018-06-24 21:15:52,984 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:15:52,984 INFO ]: Finished difference Result 7 states and 7 transitions. [2018-06-24 21:15:52,984 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-24 21:15:52,984 INFO ]: Start accepts. Automaton has 10 states. Word has length 8 [2018-06-24 21:15:52,984 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:15:52,984 INFO ]: With dead ends: 7 [2018-06-24 21:15:52,984 INFO ]: Without dead ends: 0 [2018-06-24 21:15:52,985 INFO ]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2018-06-24 21:15:52,985 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-24 21:15:52,985 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-24 21:15:52,985 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-24 21:15:52,985 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-24 21:15:52,985 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 8 [2018-06-24 21:15:52,985 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:15:52,985 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-24 21:15:52,985 INFO ]: Interpolant automaton has 10 states. [2018-06-24 21:15:52,985 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-24 21:15:52,985 INFO ]: Finished isEmpty. No accepting run. [2018-06-24 21:15:52,987 INFO ]: Did not count any witness invariants because Icfg is not BoogieIcfg [2018-06-24 21:15:52,988 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.06 09:15:52 BasicIcfg [2018-06-24 21:15:52,988 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-24 21:15:52,989 INFO ]: Toolchain (without parser) took 2337.62 ms. Allocated memory is still 309.3 MB. Free memory was 264.7 MB in the beginning and 194.1 MB in the end (delta: 70.6 MB). Peak memory consumption was 70.6 MB. Max. memory is 3.6 GB. [2018-06-24 21:15:52,990 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 309.3 MB. Free memory is still 272.8 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-24 21:15:52,990 INFO ]: ChcToBoogie took 57.08 ms. Allocated memory is still 309.3 MB. Free memory was 263.7 MB in the beginning and 261.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-24 21:15:52,991 INFO ]: Boogie Preprocessor took 31.64 ms. Allocated memory is still 309.3 MB. Free memory was 261.7 MB in the beginning and 260.7 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. [2018-06-24 21:15:52,991 INFO ]: RCFGBuilder took 178.17 ms. Allocated memory is still 309.3 MB. Free memory was 260.7 MB in the beginning and 253.7 MB in the end (delta: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 3.6 GB. [2018-06-24 21:15:52,992 INFO ]: BlockEncodingV2 took 63.45 ms. Allocated memory is still 309.3 MB. Free memory was 253.7 MB in the beginning and 251.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-24 21:15:52,993 INFO ]: TraceAbstraction took 1994.37 ms. Allocated memory is still 309.3 MB. Free memory was 251.7 MB in the beginning and 194.1 MB in the end (delta: 57.6 MB). Peak memory consumption was 57.6 MB. Max. memory is 3.6 GB. [2018-06-24 21:15:52,996 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.plugins.blockencoding: - StatisticsResult: Initial Icfg 10 locations, 11 edges - StatisticsResult: Encoded RCFG 6 locations, 6 edges * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.07 ms. Allocated memory is still 309.3 MB. Free memory is still 272.8 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 57.08 ms. Allocated memory is still 309.3 MB. Free memory was 263.7 MB in the beginning and 261.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 31.64 ms. Allocated memory is still 309.3 MB. Free memory was 261.7 MB in the beginning and 260.7 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. * RCFGBuilder took 178.17 ms. Allocated memory is still 309.3 MB. Free memory was 260.7 MB in the beginning and 253.7 MB in the end (delta: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 3.6 GB. * BlockEncodingV2 took 63.45 ms. Allocated memory is still 309.3 MB. Free memory was 253.7 MB in the beginning and 251.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 1994.37 ms. Allocated memory is still 309.3 MB. Free memory was 251.7 MB in the beginning and 194.1 MB in the end (delta: 57.6 MB). Peak memory consumption was 57.6 MB. 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, 1.9s OverallTime, 3 OverallIterations, 3 TraceHistogramMax, 0.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 12 SDtfs, 0 SDslu, 20 SDs, 0 SdLazy, 39 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=9occurred in iteration=2, 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, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 33 NumberOfCodeBlocks, 33 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 28 ConstructedInterpolants, 0 QuantifiedInterpolants, 812 SizeOfPredicates, 8 NumberOfNonLiveVariables, 122 ConjunctsInSsa, 44 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 0/14 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/enc-rev_accum.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-GraphSizeCsvProvider-0-2018-06-24_21-15-53-008.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/enc-rev_accum.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-GraphSizeCsvProvider-1-2018-06-24_21-15-53-008.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/enc-rev_accum.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-Benchmark-0-2018-06-24_21-15-53-008.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/enc-rev_accum.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-24_21-15-53-008.csv Received shutdown request...