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/sum4.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-62c3406-m [2018-06-26 18:26:59,534 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-26 18:26:59,541 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-26 18:26:59,555 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-26 18:26:59,555 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-26 18:26:59,556 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-26 18:26:59,557 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-26 18:26:59,560 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-26 18:26:59,562 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-26 18:26:59,563 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-26 18:26:59,564 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-26 18:26:59,564 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-26 18:26:59,565 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-26 18:26:59,573 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-26 18:26:59,574 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-26 18:26:59,574 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-26 18:26:59,575 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-26 18:26:59,578 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-26 18:26:59,580 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-26 18:26:59,581 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-26 18:26:59,582 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-26 18:26:59,583 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-26 18:26:59,585 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-26 18:26:59,585 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-26 18:26:59,586 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-26 18:26:59,586 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-26 18:26:59,587 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-26 18:26:59,588 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-26 18:26:59,588 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-26 18:26:59,589 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-26 18:26:59,589 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-26 18:26:59,590 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-26 18:26:59,590 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-06-26 18:26:59,590 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-26 18:26:59,591 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-26 18:26:59,592 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-26 18:26:59,592 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-26 18:26:59,616 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-26 18:26:59,617 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-26 18:26:59,617 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-26 18:26:59,617 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-26 18:26:59,618 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-26 18:26:59,618 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-26 18:26:59,618 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-26 18:26:59,619 INFO L133 SettingsManager]: * Use SBE=true [2018-06-26 18:26:59,625 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-26 18:26:59,626 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-26 18:26:59,626 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-26 18:26:59,626 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-26 18:26:59,626 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-26 18:26:59,626 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-26 18:26:59,627 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-26 18:26:59,627 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-26 18:26:59,627 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-26 18:26:59,627 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-26 18:26:59,627 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-26 18:26:59,627 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-26 18:26:59,628 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-26 18:26:59,629 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-26 18:26:59,629 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-26 18:26:59,671 INFO ]: Repository-Root is: /tmp [2018-06-26 18:26:59,681 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-26 18:26:59,687 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-26 18:26:59,688 INFO ]: Initializing SmtParser... [2018-06-26 18:26:59,688 INFO ]: SmtParser initialized [2018-06-26 18:26:59,689 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/hopv/lia/mochi/sum4.smt2 [2018-06-26 18:26:59,690 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 18:26:59,777 INFO ]: Executing SMT file /storage/chc-comp/hopv/lia/mochi/sum4.smt2 unknown [2018-06-26 18:26:59,920 INFO ]: Succesfully executed SMT file /storage/chc-comp/hopv/lia/mochi/sum4.smt2 [2018-06-26 18:26:59,927 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-26 18:26:59,933 INFO ]: Walking toolchain with 5 elements. [2018-06-26 18:26:59,934 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-26 18:26:59,934 INFO ]: Initializing ChcToBoogie... [2018-06-26 18:26:59,934 INFO ]: ChcToBoogie initialized [2018-06-26 18:26:59,937 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 26.06 06:26:59" (1/1) ... [2018-06-26 18:26:59,993 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 06:26:59 Unit [2018-06-26 18:26:59,994 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-26 18:26:59,995 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-26 18:26:59,995 INFO ]: Initializing Boogie Preprocessor... [2018-06-26 18:26:59,995 INFO ]: Boogie Preprocessor initialized [2018-06-26 18:27:00,018 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 06:26:59" (1/1) ... [2018-06-26 18:27:00,019 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 06:26:59" (1/1) ... [2018-06-26 18:27:00,024 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 06:26:59" (1/1) ... [2018-06-26 18:27:00,024 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 06:26:59" (1/1) ... [2018-06-26 18:27:00,026 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 06:26:59" (1/1) ... [2018-06-26 18:27:00,028 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 06:26:59" (1/1) ... [2018-06-26 18:27:00,029 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 06:26:59" (1/1) ... [2018-06-26 18:27:00,031 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-26 18:27:00,031 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-26 18:27:00,031 INFO ]: Initializing RCFGBuilder... [2018-06-26 18:27:00,031 INFO ]: RCFGBuilder initialized [2018-06-26 18:27:00,032 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 06:26:59" (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 18:27:00,049 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-26 18:27:00,049 INFO ]: Found specification of procedure gotoProc [2018-06-26 18:27:00,049 INFO ]: Found implementation of procedure gotoProc [2018-06-26 18:27:00,049 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-26 18:27:00,049 INFO ]: Found specification of procedure Ultimate.START [2018-06-26 18:27:00,049 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 18:27:00,220 INFO ]: Using library mode [2018-06-26 18:27:00,221 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.06 06:27:00 BoogieIcfgContainer [2018-06-26 18:27:00,221 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-26 18:27:00,221 INFO ]: ------------------------BlockEncodingV2---------------------------- [2018-06-26 18:27:00,221 INFO ]: Initializing BlockEncodingV2... [2018-06-26 18:27:00,222 INFO ]: BlockEncodingV2 initialized [2018-06-26 18:27:00,223 INFO ]: Executing the observer BlockEncodingObserver from plugin BlockEncodingV2 for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.06 06:27:00" (1/1) ... [2018-06-26 18:27:00,239 INFO ]: Initial Icfg 10 locations, 11 edges [2018-06-26 18:27:00,240 INFO ]: Using Remove infeasible edges [2018-06-26 18:27:00,241 INFO ]: Using Maximize final states [2018-06-26 18:27:00,242 INFO ]: Using Minimize states even if more edges are added than removed.=false [2018-06-26 18:27:00,242 INFO ]: Using Minimize states using LBE with the strategy=MULTI [2018-06-26 18:27:00,244 INFO ]: Using Remove sink states [2018-06-26 18:27:00,245 INFO ]: Using Apply optimizations until nothing changes=true [2018-06-26 18:27:00,245 INFO ]: Using Use SBE [2018-06-26 18:27:00,252 INFO ]: SBE split 0 edges [2018-06-26 18:27:00,258 INFO ]: Removed 3 edges and 2 locations because of local infeasibility [2018-06-26 18:27:00,259 INFO ]: 0 new accepting states [2018-06-26 18:27:00,299 INFO ]: Removed 4 edges and 2 locations by large block encoding [2018-06-26 18:27:00,301 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-26 18:27:00,314 INFO ]: Removed 0 edges and 0 locations because of local infeasibility [2018-06-26 18:27:00,314 INFO ]: 0 new accepting states [2018-06-26 18:27:00,315 INFO ]: Removed 0 edges and 0 locations by large block encoding [2018-06-26 18:27:00,315 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-26 18:27:00,315 INFO ]: Encoded RCFG 6 locations, 6 edges [2018-06-26 18:27:00,315 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 26.06 06:27:00 BasicIcfg [2018-06-26 18:27:00,315 INFO ]: ------------------------ END BlockEncodingV2---------------------------- [2018-06-26 18:27:00,316 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-26 18:27:00,316 INFO ]: Initializing TraceAbstraction... [2018-06-26 18:27:00,319 INFO ]: TraceAbstraction initialized [2018-06-26 18:27:00,320 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 26.06 06:26:59" (1/4) ... [2018-06-26 18:27:00,320 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fe04618 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 26.06 06:27:00, skipping insertion in model container [2018-06-26 18:27:00,320 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 06:26:59" (2/4) ... [2018-06-26 18:27:00,322 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fe04618 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.06 06:27:00, skipping insertion in model container [2018-06-26 18:27:00,322 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.06 06:27:00" (3/4) ... [2018-06-26 18:27:00,322 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fe04618 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.06 06:27:00, skipping insertion in model container [2018-06-26 18:27:00,322 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 26.06 06:27:00" (4/4) ... [2018-06-26 18:27:00,324 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver_BEv2 [2018-06-26 18:27:00,334 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-26 18:27:00,343 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-26 18:27:00,380 INFO ]: Using default assertion order modulation [2018-06-26 18:27:00,380 INFO ]: Interprodecural is true [2018-06-26 18:27:00,381 INFO ]: Hoare is false [2018-06-26 18:27:00,381 INFO ]: Compute interpolants for FPandBP [2018-06-26 18:27:00,381 INFO ]: Backedges is TWOTRACK [2018-06-26 18:27:00,381 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-26 18:27:00,381 INFO ]: Difference is false [2018-06-26 18:27:00,381 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-26 18:27:00,381 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-26 18:27:00,396 INFO ]: Start isEmpty. Operand 6 states. [2018-06-26 18:27:00,408 INFO ]: Finished isEmpty. Found accepting run of length 6 [2018-06-26 18:27:00,408 INFO ]: Found error trace [2018-06-26 18:27:00,409 INFO ]: trace histogram [1, 1, 1, 1, 1] [2018-06-26 18:27:00,409 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 18:27:00,415 INFO ]: Analyzing trace with hash 35433345, now seen corresponding path program 1 times [2018-06-26 18:27:00,417 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 18:27:00,418 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 18:27:00,457 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:27:00,457 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 18:27:00,457 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:27:00,498 INFO ]: Conjunction of SSA is unsat [2018-06-26 18:27:00,587 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 18:27:00,589 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-26 18:27:00,589 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-26 18:27:00,591 INFO ]: Interpolant automaton has 3 states [2018-06-26 18:27:00,611 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-26 18:27:00,611 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-26 18:27:00,614 INFO ]: Start difference. First operand 6 states. Second operand 3 states. [2018-06-26 18:27:00,686 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 18:27:00,686 INFO ]: Finished difference Result 7 states and 7 transitions. [2018-06-26 18:27:00,687 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-26 18:27:00,688 INFO ]: Start accepts. Automaton has 3 states. Word has length 5 [2018-06-26 18:27:00,689 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 18:27:00,697 INFO ]: With dead ends: 7 [2018-06-26 18:27:00,697 INFO ]: Without dead ends: 7 [2018-06-26 18:27:00,698 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 [2018-06-26 18:27:00,714 INFO ]: Start minimizeSevpa. Operand 7 states. [2018-06-26 18:27:00,729 INFO ]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-06-26 18:27:00,731 INFO ]: Start removeUnreachable. Operand 7 states. [2018-06-26 18:27:00,731 INFO ]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-06-26 18:27:00,732 INFO ]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-06-26 18:27:00,733 INFO ]: Finished accepts. word is rejected. [2018-06-26 18:27:00,733 INFO ]: Abstraction has 7 states and 7 transitions. [2018-06-26 18:27:00,733 INFO ]: Interpolant automaton has 3 states. [2018-06-26 18:27:00,733 INFO ]: Start isEmpty. Operand 7 states and 7 transitions. [2018-06-26 18:27:00,733 INFO ]: Finished isEmpty. Found accepting run of length 7 [2018-06-26 18:27:00,733 INFO ]: Found error trace [2018-06-26 18:27:00,733 INFO ]: trace histogram [1, 1, 1, 1, 1, 1] [2018-06-26 18:27:00,733 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 18:27:00,733 INFO ]: Analyzing trace with hash 1098137897, now seen corresponding path program 1 times [2018-06-26 18:27:00,733 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 18:27:00,733 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 18:27:00,739 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:27:00,739 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 18:27:00,739 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:27:00,755 INFO ]: Conjunction of SSA is unsat [2018-06-26 18:27:00,936 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 18:27:00,936 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-26 18:27:00,936 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 [2018-06-26 18:27:00,948 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 18:27:00,998 INFO ]: Conjunction of SSA is unsat [2018-06-26 18:27:01,008 INFO ]: Computing forward predicates... [2018-06-26 18:27:01,182 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 18:27:01,202 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-26 18:27:01,202 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-06-26 18:27:01,202 INFO ]: Interpolant automaton has 4 states [2018-06-26 18:27:01,203 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-26 18:27:01,203 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-26 18:27:01,203 INFO ]: Start difference. First operand 7 states and 7 transitions. Second operand 4 states. [2018-06-26 18:27:01,238 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 18:27:01,238 INFO ]: Finished difference Result 8 states and 8 transitions. [2018-06-26 18:27:01,238 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-26 18:27:01,238 INFO ]: Start accepts. Automaton has 4 states. Word has length 6 [2018-06-26 18:27:01,239 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 18:27:01,239 INFO ]: With dead ends: 8 [2018-06-26 18:27:01,239 INFO ]: Without dead ends: 8 [2018-06-26 18:27:01,240 INFO ]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-26 18:27:01,240 INFO ]: Start minimizeSevpa. Operand 8 states. [2018-06-26 18:27:01,242 INFO ]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-06-26 18:27:01,242 INFO ]: Start removeUnreachable. Operand 8 states. [2018-06-26 18:27:01,242 INFO ]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-06-26 18:27:01,242 INFO ]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-06-26 18:27:01,242 INFO ]: Finished accepts. word is rejected. [2018-06-26 18:27:01,242 INFO ]: Abstraction has 8 states and 8 transitions. [2018-06-26 18:27:01,242 INFO ]: Interpolant automaton has 4 states. [2018-06-26 18:27:01,242 INFO ]: Start isEmpty. Operand 8 states and 8 transitions. [2018-06-26 18:27:01,243 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-26 18:27:01,243 INFO ]: Found error trace [2018-06-26 18:27:01,243 INFO ]: trace histogram [2, 1, 1, 1, 1, 1] [2018-06-26 18:27:01,243 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 18:27:01,243 INFO ]: Analyzing trace with hash -317759359, now seen corresponding path program 2 times [2018-06-26 18:27:01,243 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 18:27:01,243 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 18:27:01,244 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:27:01,244 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 18:27:01,244 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:27:01,263 INFO ]: Conjunction of SSA is unsat [2018-06-26 18:27:01,365 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 18:27:01,365 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-26 18:27:01,365 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 [2018-06-26 18:27:01,373 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-26 18:27:01,408 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-26 18:27:01,409 INFO ]: Conjunction of SSA is unsat [2018-06-26 18:27:01,410 INFO ]: Computing forward predicates... [2018-06-26 18:27:01,557 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 18:27:01,587 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-26 18:27:01,587 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-06-26 18:27:01,587 INFO ]: Interpolant automaton has 5 states [2018-06-26 18:27:01,587 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-26 18:27:01,587 INFO ]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-06-26 18:27:01,587 INFO ]: Start difference. First operand 8 states and 8 transitions. Second operand 5 states. [2018-06-26 18:27:01,738 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 18:27:01,738 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-26 18:27:01,739 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-26 18:27:01,739 INFO ]: Start accepts. Automaton has 5 states. Word has length 7 [2018-06-26 18:27:01,739 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 18:27:01,739 INFO ]: With dead ends: 9 [2018-06-26 18:27:01,739 INFO ]: Without dead ends: 9 [2018-06-26 18:27:01,740 INFO ]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-06-26 18:27:01,740 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-26 18:27:01,741 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-26 18:27:01,741 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-26 18:27:01,741 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-26 18:27:01,741 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-26 18:27:01,741 INFO ]: Finished accepts. word is rejected. [2018-06-26 18:27:01,741 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-26 18:27:01,741 INFO ]: Interpolant automaton has 5 states. [2018-06-26 18:27:01,741 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-26 18:27:01,742 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-26 18:27:01,742 INFO ]: Found error trace [2018-06-26 18:27:01,742 INFO ]: trace histogram [3, 1, 1, 1, 1, 1] [2018-06-26 18:27:01,742 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 18:27:01,742 INFO ]: Analyzing trace with hash -1260901335, now seen corresponding path program 3 times [2018-06-26 18:27:01,742 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 18:27:01,742 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 18:27:01,743 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:27:01,743 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-26 18:27:01,743 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:27:01,758 INFO ]: Conjunction of SSA is unsat [2018-06-26 18:27:01,952 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 18:27:01,952 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-26 18:27:01,952 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 [2018-06-26 18:27:01,959 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-26 18:27:01,982 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-26 18:27:01,982 INFO ]: Conjunction of SSA is unsat [2018-06-26 18:27:01,984 INFO ]: Computing forward predicates... [2018-06-26 18:27:02,037 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 18:27:02,056 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-26 18:27:02,056 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-06-26 18:27:02,057 INFO ]: Interpolant automaton has 6 states [2018-06-26 18:27:02,057 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-26 18:27:02,057 INFO ]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-06-26 18:27:02,057 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 6 states. [2018-06-26 18:27:02,087 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 18:27:02,087 INFO ]: Finished difference Result 6 states and 6 transitions. [2018-06-26 18:27:02,087 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-26 18:27:02,087 INFO ]: Start accepts. Automaton has 6 states. Word has length 8 [2018-06-26 18:27:02,087 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 18:27:02,087 INFO ]: With dead ends: 6 [2018-06-26 18:27:02,087 INFO ]: Without dead ends: 0 [2018-06-26 18:27:02,088 INFO ]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-06-26 18:27:02,088 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-26 18:27:02,088 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-26 18:27:02,088 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-26 18:27:02,088 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-26 18:27:02,088 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 8 [2018-06-26 18:27:02,088 INFO ]: Finished accepts. word is rejected. [2018-06-26 18:27:02,088 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-26 18:27:02,088 INFO ]: Interpolant automaton has 6 states. [2018-06-26 18:27:02,088 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-26 18:27:02,088 INFO ]: Finished isEmpty. No accepting run. [2018-06-26 18:27:02,090 INFO ]: Did not count any witness invariants because Icfg is not BoogieIcfg [2018-06-26 18:27:02,091 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.06 06:27:02 BasicIcfg [2018-06-26 18:27:02,092 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-26 18:27:02,092 INFO ]: Toolchain (without parser) took 2164.90 ms. Allocated memory is still 308.8 MB. Free memory was 266.1 MB in the beginning and 198.7 MB in the end (delta: 67.4 MB). Peak memory consumption was 67.4 MB. Max. memory is 3.6 GB. [2018-06-26 18:27:02,094 INFO ]: SmtParser took 0.06 ms. Allocated memory is still 308.8 MB. Free memory is still 274.3 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-26 18:27:02,094 INFO ]: ChcToBoogie took 61.01 ms. Allocated memory is still 308.8 MB. Free memory was 266.1 MB in the beginning and 263.1 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. [2018-06-26 18:27:02,095 INFO ]: Boogie Preprocessor took 35.37 ms. Allocated memory is still 308.8 MB. Free memory was 263.1 MB in the beginning and 262.1 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. [2018-06-26 18:27:02,095 INFO ]: RCFGBuilder took 189.83 ms. Allocated memory is still 308.8 MB. Free memory was 262.1 MB in the beginning and 256.1 MB in the end (delta: 6.0 MB). Peak memory consumption was 6.0 MB. Max. memory is 3.6 GB. [2018-06-26 18:27:02,096 INFO ]: BlockEncodingV2 took 94.11 ms. Allocated memory is still 308.8 MB. Free memory was 256.1 MB in the beginning and 253.1 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. [2018-06-26 18:27:02,097 INFO ]: TraceAbstraction took 1775.17 ms. Allocated memory is still 308.8 MB. Free memory was 253.1 MB in the beginning and 198.7 MB in the end (delta: 54.4 MB). Peak memory consumption was 54.4 MB. Max. memory is 3.6 GB. [2018-06-26 18:27:02,101 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 0.06 ms. Allocated memory is still 308.8 MB. Free memory is still 274.3 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 61.01 ms. Allocated memory is still 308.8 MB. Free memory was 266.1 MB in the beginning and 263.1 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 35.37 ms. Allocated memory is still 308.8 MB. Free memory was 263.1 MB in the beginning and 262.1 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. * RCFGBuilder took 189.83 ms. Allocated memory is still 308.8 MB. Free memory was 262.1 MB in the beginning and 256.1 MB in the end (delta: 6.0 MB). Peak memory consumption was 6.0 MB. Max. memory is 3.6 GB. * BlockEncodingV2 took 94.11 ms. Allocated memory is still 308.8 MB. Free memory was 256.1 MB in the beginning and 253.1 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 1775.17 ms. Allocated memory is still 308.8 MB. Free memory was 253.1 MB in the beginning and 198.7 MB in the end (delta: 54.4 MB). Peak memory consumption was 54.4 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, 1.7s OverallTime, 4 OverallIterations, 3 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 17 SDtfs, 0 SDslu, 22 SDs, 0 SdLazy, 45 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=9occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 47 NumberOfCodeBlocks, 47 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 40 ConstructedInterpolants, 0 QuantifiedInterpolants, 908 SizeOfPredicates, 9 NumberOfNonLiveVariables, 153 ConjunctsInSsa, 54 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 0/20 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/sum4.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-GraphSizeCsvProvider-0-2018-06-26_18-27-02-117.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/sum4.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-GraphSizeCsvProvider-1-2018-06-26_18-27-02-117.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/sum4.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-Benchmark-0-2018-06-26_18-27-02-117.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/sum4.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-26_18-27-02-117.csv Received shutdown request...