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/ctigar/gulwani_fig1a.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-62c3406-m [2018-06-26 21:32:14,596 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-26 21:32:14,598 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-26 21:32:14,613 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-26 21:32:14,613 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-26 21:32:14,614 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-26 21:32:14,618 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-26 21:32:14,620 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-26 21:32:14,622 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-26 21:32:14,622 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-26 21:32:14,623 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-06-26 21:32:14,642 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-26 21:32:14,642 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-26 21:32:14,643 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-26 21:32:14,643 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-26 21:32:14,644 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-26 21:32:14,645 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-26 21:32:14,646 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-26 21:32:14,646 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-26 21:32:14,647 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-06-26 21:32:14,649 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-26 21:32:14,663 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-26 21:32:14,663 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-26 21:32:14,663 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-26 21:32:14,664 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-26 21:32:14,665 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-26 21:32:14,665 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-26 21:32:14,665 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-26 21:32:14,665 INFO L133 SettingsManager]: * Use SBE=true [2018-06-26 21:32:14,666 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-26 21:32:14,666 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-26 21:32:14,666 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-26 21:32:14,666 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-26 21:32:14,666 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-26 21:32:14,667 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-26 21:32:14,667 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-26 21:32:14,667 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-26 21:32:14,667 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-26 21:32:14,667 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-26 21:32:14,668 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-26 21:32:14,668 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-26 21:32:14,668 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-26 21:32:14,670 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-26 21:32:14,670 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-26 21:32:14,711 INFO ]: Repository-Root is: /tmp [2018-06-26 21:32:14,724 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-26 21:32:14,727 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-26 21:32:14,728 INFO ]: Initializing SmtParser... [2018-06-26 21:32:14,728 INFO ]: SmtParser initialized [2018-06-26 21:32:14,728 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/gulwani_fig1a.c.smt2 [2018-06-26 21:32:14,729 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 21:32:14,825 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/gulwani_fig1a.c.smt2 unknown [2018-06-26 21:32:15,040 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/gulwani_fig1a.c.smt2 [2018-06-26 21:32:15,048 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-26 21:32:15,053 INFO ]: Walking toolchain with 5 elements. [2018-06-26 21:32:15,054 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-26 21:32:15,054 INFO ]: Initializing ChcToBoogie... [2018-06-26 21:32:15,054 INFO ]: ChcToBoogie initialized [2018-06-26 21:32:15,058 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 26.06 09:32:15" (1/1) ... [2018-06-26 21:32:15,113 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:32:15 Unit [2018-06-26 21:32:15,113 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-26 21:32:15,114 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-26 21:32:15,114 INFO ]: Initializing Boogie Preprocessor... [2018-06-26 21:32:15,114 INFO ]: Boogie Preprocessor initialized [2018-06-26 21:32:15,139 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:32:15" (1/1) ... [2018-06-26 21:32:15,139 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:32:15" (1/1) ... [2018-06-26 21:32:15,147 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:32:15" (1/1) ... [2018-06-26 21:32:15,147 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:32:15" (1/1) ... [2018-06-26 21:32:15,150 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:32:15" (1/1) ... [2018-06-26 21:32:15,154 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:32:15" (1/1) ... [2018-06-26 21:32:15,155 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:32:15" (1/1) ... [2018-06-26 21:32:15,156 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-26 21:32:15,157 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-26 21:32:15,157 INFO ]: Initializing RCFGBuilder... [2018-06-26 21:32:15,157 INFO ]: RCFGBuilder initialized [2018-06-26 21:32:15,158 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:32:15" (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 21:32:15,169 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-26 21:32:15,169 INFO ]: Found specification of procedure gotoProc [2018-06-26 21:32:15,169 INFO ]: Found implementation of procedure gotoProc [2018-06-26 21:32:15,169 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-26 21:32:15,169 INFO ]: Found specification of procedure Ultimate.START [2018-06-26 21:32:15,169 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 21:32:15,348 INFO ]: Using library mode [2018-06-26 21:32:15,348 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.06 09:32:15 BoogieIcfgContainer [2018-06-26 21:32:15,348 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-26 21:32:15,349 INFO ]: ------------------------BlockEncodingV2---------------------------- [2018-06-26 21:32:15,349 INFO ]: Initializing BlockEncodingV2... [2018-06-26 21:32:15,350 INFO ]: BlockEncodingV2 initialized [2018-06-26 21:32:15,350 INFO ]: Executing the observer BlockEncodingObserver from plugin BlockEncodingV2 for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.06 09:32:15" (1/1) ... [2018-06-26 21:32:15,364 INFO ]: Initial Icfg 10 locations, 10 edges [2018-06-26 21:32:15,365 INFO ]: Using Remove infeasible edges [2018-06-26 21:32:15,366 INFO ]: Using Maximize final states [2018-06-26 21:32:15,368 INFO ]: Using Minimize states even if more edges are added than removed.=false [2018-06-26 21:32:15,368 INFO ]: Using Minimize states using LBE with the strategy=MULTI [2018-06-26 21:32:15,370 INFO ]: Using Remove sink states [2018-06-26 21:32:15,371 INFO ]: Using Apply optimizations until nothing changes=true [2018-06-26 21:32:15,371 INFO ]: Using Use SBE [2018-06-26 21:32:15,380 WARN ]: expecting exponential blowup for input size 16 [2018-06-26 21:32:16,490 INFO ]: SBE split 1 edges [2018-06-26 21:32:16,500 INFO ]: Removed 2 edges and 2 locations because of local infeasibility [2018-06-26 21:32:16,503 INFO ]: 0 new accepting states [2018-06-26 21:32:16,549 INFO ]: Removed 4 edges and 2 locations by large block encoding [2018-06-26 21:32:16,551 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-26 21:32:16,560 INFO ]: Removed 0 edges and 0 locations because of local infeasibility [2018-06-26 21:32:16,560 INFO ]: 0 new accepting states [2018-06-26 21:32:16,561 INFO ]: Removed 0 edges and 0 locations by large block encoding [2018-06-26 21:32:16,561 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-26 21:32:16,577 INFO ]: Encoded RCFG 6 locations, 143 edges [2018-06-26 21:32:16,577 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 26.06 09:32:16 BasicIcfg [2018-06-26 21:32:16,577 INFO ]: ------------------------ END BlockEncodingV2---------------------------- [2018-06-26 21:32:16,586 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-26 21:32:16,587 INFO ]: Initializing TraceAbstraction... [2018-06-26 21:32:16,590 INFO ]: TraceAbstraction initialized [2018-06-26 21:32:16,590 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 26.06 09:32:15" (1/4) ... [2018-06-26 21:32:16,591 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66435525 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 26.06 09:32:16, skipping insertion in model container [2018-06-26 21:32:16,591 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:32:15" (2/4) ... [2018-06-26 21:32:16,591 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66435525 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.06 09:32:16, skipping insertion in model container [2018-06-26 21:32:16,591 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.06 09:32:15" (3/4) ... [2018-06-26 21:32:16,591 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66435525 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.06 09:32:16, skipping insertion in model container [2018-06-26 21:32:16,592 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 26.06 09:32:16" (4/4) ... [2018-06-26 21:32:16,593 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver_BEv2 [2018-06-26 21:32:16,617 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-26 21:32:16,633 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-26 21:32:16,701 INFO ]: Using default assertion order modulation [2018-06-26 21:32:16,701 INFO ]: Interprodecural is true [2018-06-26 21:32:16,701 INFO ]: Hoare is false [2018-06-26 21:32:16,702 INFO ]: Compute interpolants for FPandBP [2018-06-26 21:32:16,702 INFO ]: Backedges is TWOTRACK [2018-06-26 21:32:16,702 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-26 21:32:16,703 INFO ]: Difference is false [2018-06-26 21:32:16,703 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-26 21:32:16,703 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-26 21:32:16,717 INFO ]: Start isEmpty. Operand 6 states. [2018-06-26 21:32:16,733 INFO ]: Finished isEmpty. Found accepting run of length 6 [2018-06-26 21:32:16,734 INFO ]: Found error trace [2018-06-26 21:32:16,734 INFO ]: trace histogram [1, 1, 1, 1, 1] [2018-06-26 21:32:16,735 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 21:32:16,740 INFO ]: Analyzing trace with hash 39646338, now seen corresponding path program 1 times [2018-06-26 21:32:16,742 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 21:32:16,742 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 21:32:16,793 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:32:16,793 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 21:32:16,793 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:32:16,843 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:32:16,953 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 21:32:16,956 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-26 21:32:16,956 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-26 21:32:16,958 INFO ]: Interpolant automaton has 3 states [2018-06-26 21:32:16,974 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-26 21:32:16,974 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-26 21:32:16,977 INFO ]: Start difference. First operand 6 states. Second operand 3 states. [2018-06-26 21:32:18,389 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 21:32:18,389 INFO ]: Finished difference Result 7 states and 206 transitions. [2018-06-26 21:32:18,390 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-26 21:32:18,391 INFO ]: Start accepts. Automaton has 3 states. Word has length 5 [2018-06-26 21:32:18,391 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 21:32:18,400 INFO ]: With dead ends: 7 [2018-06-26 21:32:18,401 INFO ]: Without dead ends: 7 [2018-06-26 21:32:18,402 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 21:32:18,419 INFO ]: Start minimizeSevpa. Operand 7 states. [2018-06-26 21:32:18,437 INFO ]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-06-26 21:32:18,438 INFO ]: Start removeUnreachable. Operand 7 states. [2018-06-26 21:32:18,439 INFO ]: Finished removeUnreachable. Reduced from 7 states to 7 states and 206 transitions. [2018-06-26 21:32:18,440 INFO ]: Start accepts. Automaton has 7 states and 206 transitions. Word has length 5 [2018-06-26 21:32:18,441 INFO ]: Finished accepts. word is rejected. [2018-06-26 21:32:18,441 INFO ]: Abstraction has 7 states and 206 transitions. [2018-06-26 21:32:18,441 INFO ]: Interpolant automaton has 3 states. [2018-06-26 21:32:18,441 INFO ]: Start isEmpty. Operand 7 states and 206 transitions. [2018-06-26 21:32:18,442 INFO ]: Finished isEmpty. Found accepting run of length 7 [2018-06-26 21:32:18,442 INFO ]: Found error trace [2018-06-26 21:32:18,442 INFO ]: trace histogram [1, 1, 1, 1, 1, 1] [2018-06-26 21:32:18,442 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 21:32:18,442 INFO ]: Analyzing trace with hash 1225387720, now seen corresponding path program 1 times [2018-06-26 21:32:18,442 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 21:32:18,442 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 21:32:18,443 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:32:18,443 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 21:32:18,443 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:32:18,450 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:32:18,509 INFO ]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 21:32:18,509 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-26 21:32:18,509 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-26 21:32:18,511 INFO ]: Interpolant automaton has 3 states [2018-06-26 21:32:18,511 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-26 21:32:18,511 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-26 21:32:18,511 INFO ]: Start difference. First operand 7 states and 206 transitions. Second operand 3 states. [2018-06-26 21:32:19,179 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 21:32:19,179 INFO ]: Finished difference Result 9 states and 279 transitions. [2018-06-26 21:32:19,179 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-26 21:32:19,180 INFO ]: Start accepts. Automaton has 3 states. Word has length 6 [2018-06-26 21:32:19,180 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 21:32:19,181 INFO ]: With dead ends: 9 [2018-06-26 21:32:19,181 INFO ]: Without dead ends: 9 [2018-06-26 21:32:19,182 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 21:32:19,182 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-26 21:32:19,186 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-26 21:32:19,186 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-26 21:32:19,187 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 279 transitions. [2018-06-26 21:32:19,187 INFO ]: Start accepts. Automaton has 9 states and 279 transitions. Word has length 6 [2018-06-26 21:32:19,187 INFO ]: Finished accepts. word is rejected. [2018-06-26 21:32:19,187 INFO ]: Abstraction has 9 states and 279 transitions. [2018-06-26 21:32:19,187 INFO ]: Interpolant automaton has 3 states. [2018-06-26 21:32:19,187 INFO ]: Start isEmpty. Operand 9 states and 279 transitions. [2018-06-26 21:32:19,188 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-26 21:32:19,188 INFO ]: Found error trace [2018-06-26 21:32:19,188 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-26 21:32:19,188 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 21:32:19,188 INFO ]: Analyzing trace with hash -670500954, now seen corresponding path program 1 times [2018-06-26 21:32:19,188 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 21:32:19,188 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 21:32:19,189 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:32:19,189 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 21:32:19,189 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:32:19,200 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:32:19,218 INFO ]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 21:32:19,218 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-26 21:32:19,218 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-26 21:32:19,218 INFO ]: Interpolant automaton has 3 states [2018-06-26 21:32:19,218 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-26 21:32:19,218 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-26 21:32:19,218 INFO ]: Start difference. First operand 9 states and 279 transitions. Second operand 3 states. [2018-06-26 21:32:19,552 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 21:32:19,552 INFO ]: Finished difference Result 13 states and 421 transitions. [2018-06-26 21:32:19,552 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-26 21:32:19,552 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-26 21:32:19,552 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 21:32:19,553 INFO ]: With dead ends: 13 [2018-06-26 21:32:19,553 INFO ]: Without dead ends: 10 [2018-06-26 21:32:19,553 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 21:32:19,553 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-26 21:32:19,555 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-26 21:32:19,555 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-26 21:32:19,556 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 65 transitions. [2018-06-26 21:32:19,556 INFO ]: Start accepts. Automaton has 10 states and 65 transitions. Word has length 7 [2018-06-26 21:32:19,556 INFO ]: Finished accepts. word is rejected. [2018-06-26 21:32:19,556 INFO ]: Abstraction has 10 states and 65 transitions. [2018-06-26 21:32:19,556 INFO ]: Interpolant automaton has 3 states. [2018-06-26 21:32:19,556 INFO ]: Start isEmpty. Operand 10 states and 65 transitions. [2018-06-26 21:32:19,556 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-26 21:32:19,556 INFO ]: Found error trace [2018-06-26 21:32:19,556 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-26 21:32:19,556 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 21:32:19,556 INFO ]: Analyzing trace with hash -1428965440, now seen corresponding path program 1 times [2018-06-26 21:32:19,556 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 21:32:19,556 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 21:32:19,557 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:32:19,557 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 21:32:19,557 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:32:19,565 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:32:19,603 INFO ]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-26 21:32:19,603 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-26 21:32:19,604 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-26 21:32:19,604 INFO ]: Interpolant automaton has 3 states [2018-06-26 21:32:19,604 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-26 21:32:19,604 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-26 21:32:19,604 INFO ]: Start difference. First operand 10 states and 65 transitions. Second operand 3 states. [2018-06-26 21:32:19,683 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 21:32:19,683 INFO ]: Finished difference Result 12 states and 52 transitions. [2018-06-26 21:32:19,683 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-26 21:32:19,683 INFO ]: Start accepts. Automaton has 3 states. Word has length 8 [2018-06-26 21:32:19,683 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 21:32:19,683 INFO ]: With dead ends: 12 [2018-06-26 21:32:19,683 INFO ]: Without dead ends: 12 [2018-06-26 21:32:19,684 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 21:32:19,684 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-26 21:32:19,685 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-06-26 21:32:19,685 INFO ]: Start removeUnreachable. Operand 12 states. [2018-06-26 21:32:19,686 INFO ]: Finished removeUnreachable. Reduced from 12 states to 12 states and 52 transitions. [2018-06-26 21:32:19,686 INFO ]: Start accepts. Automaton has 12 states and 52 transitions. Word has length 8 [2018-06-26 21:32:19,686 INFO ]: Finished accepts. word is rejected. [2018-06-26 21:32:19,686 INFO ]: Abstraction has 12 states and 52 transitions. [2018-06-26 21:32:19,686 INFO ]: Interpolant automaton has 3 states. [2018-06-26 21:32:19,686 INFO ]: Start isEmpty. Operand 12 states and 52 transitions. [2018-06-26 21:32:19,686 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-26 21:32:19,686 INFO ]: Found error trace [2018-06-26 21:32:19,686 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-26 21:32:19,686 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 21:32:19,686 INFO ]: Analyzing trace with hash 2064385628, now seen corresponding path program 1 times [2018-06-26 21:32:19,686 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 21:32:19,686 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 21:32:19,687 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:32:19,687 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 21:32:19,687 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:32:19,698 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:32:19,721 INFO ]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-26 21:32:19,721 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-26 21:32:19,721 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-26 21:32:19,722 INFO ]: Interpolant automaton has 3 states [2018-06-26 21:32:19,722 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-26 21:32:19,722 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-26 21:32:19,722 INFO ]: Start difference. First operand 12 states and 52 transitions. Second operand 3 states. [2018-06-26 21:32:19,850 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 21:32:19,850 INFO ]: Finished difference Result 20 states and 97 transitions. [2018-06-26 21:32:19,850 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-26 21:32:19,850 INFO ]: Start accepts. Automaton has 3 states. Word has length 8 [2018-06-26 21:32:19,850 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 21:32:19,852 INFO ]: With dead ends: 20 [2018-06-26 21:32:19,852 INFO ]: Without dead ends: 20 [2018-06-26 21:32:19,853 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 21:32:19,853 INFO ]: Start minimizeSevpa. Operand 20 states. [2018-06-26 21:32:19,856 INFO ]: Finished minimizeSevpa. Reduced states from 20 to 15. [2018-06-26 21:32:19,856 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-26 21:32:19,857 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 74 transitions. [2018-06-26 21:32:19,857 INFO ]: Start accepts. Automaton has 15 states and 74 transitions. Word has length 8 [2018-06-26 21:32:19,857 INFO ]: Finished accepts. word is rejected. [2018-06-26 21:32:19,857 INFO ]: Abstraction has 15 states and 74 transitions. [2018-06-26 21:32:19,857 INFO ]: Interpolant automaton has 3 states. [2018-06-26 21:32:19,857 INFO ]: Start isEmpty. Operand 15 states and 74 transitions. [2018-06-26 21:32:19,857 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-26 21:32:19,857 INFO ]: Found error trace [2018-06-26 21:32:19,857 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-26 21:32:19,857 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 21:32:19,858 INFO ]: Analyzing trace with hash 2074918067, now seen corresponding path program 1 times [2018-06-26 21:32:19,858 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 21:32:19,858 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 21:32:19,859 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:32:19,859 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 21:32:19,859 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:32:19,877 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:32:19,945 INFO ]: Checked inductivity of 28 backedges. 15 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-06-26 21:32:19,945 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-26 21:32:19,945 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 21:32:19,952 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 21:32:19,982 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:32:19,989 INFO ]: Computing forward predicates... [2018-06-26 21:32:20,208 INFO ]: Checked inductivity of 28 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-06-26 21:32:20,240 INFO ]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-06-26 21:32:20,240 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2018-06-26 21:32:20,241 INFO ]: Interpolant automaton has 7 states [2018-06-26 21:32:20,241 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-26 21:32:20,241 INFO ]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-06-26 21:32:20,241 INFO ]: Start difference. First operand 15 states and 74 transitions. Second operand 7 states. [2018-06-26 21:32:21,602 WARN ]: Spent 160.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 8 [2018-06-26 21:32:22,026 WARN ]: Spent 103.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 7 [2018-06-26 21:32:22,085 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 21:32:22,085 INFO ]: Finished difference Result 17 states and 45 transitions. [2018-06-26 21:32:22,086 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-26 21:32:22,086 INFO ]: Start accepts. Automaton has 7 states. Word has length 12 [2018-06-26 21:32:22,086 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 21:32:22,086 INFO ]: With dead ends: 17 [2018-06-26 21:32:22,086 INFO ]: Without dead ends: 0 [2018-06-26 21:32:22,086 INFO ]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2018-06-26 21:32:22,086 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-26 21:32:22,086 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-26 21:32:22,086 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-26 21:32:22,086 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-26 21:32:22,086 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 12 [2018-06-26 21:32:22,086 INFO ]: Finished accepts. word is rejected. [2018-06-26 21:32:22,086 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-26 21:32:22,086 INFO ]: Interpolant automaton has 7 states. [2018-06-26 21:32:22,086 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-26 21:32:22,086 INFO ]: Finished isEmpty. No accepting run. [2018-06-26 21:32:22,088 INFO ]: Did not count any witness invariants because Icfg is not BoogieIcfg [2018-06-26 21:32:22,089 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.06 09:32:22 BasicIcfg [2018-06-26 21:32:22,089 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-26 21:32:22,090 INFO ]: Toolchain (without parser) took 7042.08 ms. Allocated memory was 309.3 MB in the beginning and 428.9 MB in the end (delta: 119.5 MB). Free memory was 264.8 MB in the beginning and 173.6 MB in the end (delta: 91.2 MB). Peak memory consumption was 210.7 MB. Max. memory is 3.6 GB. [2018-06-26 21:32:22,091 INFO ]: SmtParser took 0.04 ms. Allocated memory is still 309.3 MB. Free memory is still 274.9 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-26 21:32:22,092 INFO ]: ChcToBoogie took 60.10 ms. Allocated memory is still 309.3 MB. Free memory was 264.8 MB in the beginning and 262.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 3.6 GB. [2018-06-26 21:32:22,092 INFO ]: Boogie Preprocessor took 42.16 ms. Allocated memory is still 309.3 MB. Free memory was 262.7 MB in the beginning and 261.7 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. [2018-06-26 21:32:22,094 INFO ]: RCFGBuilder took 191.29 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. [2018-06-26 21:32:22,094 INFO ]: BlockEncodingV2 took 1228.79 ms. Allocated memory was 309.3 MB in the beginning and 408.9 MB in the end (delta: 99.6 MB). Free memory was 253.7 MB in the beginning and 228.3 MB in the end (delta: 25.4 MB). Peak memory consumption was 125.0 MB. Max. memory is 3.6 GB. [2018-06-26 21:32:22,095 INFO ]: TraceAbstraction took 5503.04 ms. Allocated memory was 408.9 MB in the beginning and 428.9 MB in the end (delta: 19.9 MB). Free memory was 228.3 MB in the beginning and 173.6 MB in the end (delta: 54.7 MB). Peak memory consumption was 74.6 MB. Max. memory is 3.6 GB. [2018-06-26 21:32:22,105 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.plugins.blockencoding: - StatisticsResult: Initial Icfg 10 locations, 10 edges - StatisticsResult: Encoded RCFG 6 locations, 143 edges * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.04 ms. Allocated memory is still 309.3 MB. Free memory is still 274.9 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 60.10 ms. Allocated memory is still 309.3 MB. Free memory was 264.8 MB in the beginning and 262.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 42.16 ms. Allocated memory is still 309.3 MB. Free memory was 262.7 MB in the beginning and 261.7 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. * RCFGBuilder took 191.29 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 1228.79 ms. Allocated memory was 309.3 MB in the beginning and 408.9 MB in the end (delta: 99.6 MB). Free memory was 253.7 MB in the beginning and 228.3 MB in the end (delta: 25.4 MB). Peak memory consumption was 125.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 5503.04 ms. Allocated memory was 408.9 MB in the beginning and 428.9 MB in the end (delta: 19.9 MB). Free memory was 228.3 MB in the beginning and 173.6 MB in the end (delta: 54.7 MB). Peak memory consumption was 74.6 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, 5.4s OverallTime, 6 OverallIterations, 1 TraceHistogramMax, 4.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 26 SDtfs, 2 SDslu, 20 SDs, 0 SdLazy, 754 SolverSat, 728 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 5 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 58 NumberOfCodeBlocks, 58 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 51 ConstructedInterpolants, 0 QuantifiedInterpolants, 738 SizeOfPredicates, 0 NumberOfNonLiveVariables, 182 ConjunctsInSsa, 11 ConjunctsInUnsatCore, 7 InterpolantComputations, 6 PerfectInterpolantSequences, 61/72 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/gulwani_fig1a.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-GraphSizeCsvProvider-0-2018-06-26_21-32-22-122.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/gulwani_fig1a.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-GraphSizeCsvProvider-1-2018-06-26_21-32-22-122.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/gulwani_fig1a.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-Benchmark-0-2018-06-26_21-32-22-122.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/gulwani_fig1a.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-26_21-32-22-122.csv Received shutdown request...