java -Xss4m -Xmx4000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCHC.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/lustre/stalmark_e7_76.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-14921ce [2018-06-25 17:17:04,670 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-25 17:17:04,672 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-25 17:17:04,687 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-25 17:17:04,687 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-25 17:17:04,689 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-25 17:17:04,692 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-25 17:17:04,694 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-25 17:17:04,697 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-25 17:17:04,698 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-25 17:17:04,699 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-25 17:17:04,699 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-25 17:17:04,700 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-25 17:17:04,701 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-25 17:17:04,703 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-25 17:17:04,704 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-25 17:17:04,707 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-25 17:17:04,709 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-25 17:17:04,720 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-25 17:17:04,721 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-25 17:17:04,722 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-25 17:17:04,724 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-25 17:17:04,725 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-25 17:17:04,727 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-25 17:17:04,728 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-25 17:17:04,729 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-25 17:17:04,730 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-25 17:17:04,732 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-25 17:17:04,733 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-25 17:17:04,734 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-25 17:17:04,734 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-25 17:17:04,737 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-25 17:17:04,738 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-25 17:17:04,738 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-25 17:17:04,739 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-25 17:17:04,739 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-25 17:17:04,766 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-25 17:17:04,767 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-25 17:17:04,767 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-25 17:17:04,767 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-25 17:17:04,768 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-25 17:17:04,768 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-25 17:17:04,769 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-25 17:17:04,769 INFO L133 SettingsManager]: * Use SBE=true [2018-06-25 17:17:04,769 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-25 17:17:04,769 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-25 17:17:04,769 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-25 17:17:04,770 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-25 17:17:04,771 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-25 17:17:04,771 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-25 17:17:04,771 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-25 17:17:04,772 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-25 17:17:04,773 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-25 17:17:04,773 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-25 17:17:04,773 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-25 17:17:04,774 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-25 17:17:04,774 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-25 17:17:04,775 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-25 17:17:04,776 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-25 17:17:04,834 INFO ]: Repository-Root is: /tmp [2018-06-25 17:17:04,867 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-25 17:17:04,878 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-25 17:17:04,879 INFO ]: Initializing SmtParser... [2018-06-25 17:17:04,879 INFO ]: SmtParser initialized [2018-06-25 17:17:04,880 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/stalmark_e7_76.smt2 [2018-06-25 17:17:04,882 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 [2018-06-25 17:17:04,990 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/stalmark_e7_76.smt2 unknown [2018-06-25 17:17:05,229 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/stalmark_e7_76.smt2 [2018-06-25 17:17:05,234 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-25 17:17:05,241 INFO ]: Walking toolchain with 4 elements. [2018-06-25 17:17:05,242 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-25 17:17:05,242 INFO ]: Initializing ChcToBoogie... [2018-06-25 17:17:05,242 INFO ]: ChcToBoogie initialized [2018-06-25 17:17:05,246 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 05:17:05" (1/1) ... [2018-06-25 17:17:05,311 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 05:17:05 Unit [2018-06-25 17:17:05,311 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-25 17:17:05,312 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-25 17:17:05,312 INFO ]: Initializing Boogie Preprocessor... [2018-06-25 17:17:05,312 INFO ]: Boogie Preprocessor initialized [2018-06-25 17:17:05,334 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 05:17:05" (1/1) ... [2018-06-25 17:17:05,334 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 05:17:05" (1/1) ... [2018-06-25 17:17:05,341 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 05:17:05" (1/1) ... [2018-06-25 17:17:05,342 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 05:17:05" (1/1) ... [2018-06-25 17:17:05,344 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 05:17:05" (1/1) ... [2018-06-25 17:17:05,353 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 05:17:05" (1/1) ... [2018-06-25 17:17:05,354 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 05:17:05" (1/1) ... [2018-06-25 17:17:05,356 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-25 17:17:05,357 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-25 17:17:05,357 INFO ]: Initializing RCFGBuilder... [2018-06-25 17:17:05,357 INFO ]: RCFGBuilder initialized [2018-06-25 17:17:05,358 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 05:17:05" (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) [2018-06-25 17:17:05,390 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-25 17:17:05,390 INFO ]: Found specification of procedure gotoProc [2018-06-25 17:17:05,390 INFO ]: Found implementation of procedure gotoProc [2018-06-25 17:17:05,390 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-25 17:17:05,390 INFO ]: Found specification of procedure Ultimate.START [2018-06-25 17:17:05,390 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 [2018-06-25 17:17:05,707 INFO ]: Using library mode [2018-06-25 17:17:05,710 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 05:17:05 BoogieIcfgContainer [2018-06-25 17:17:05,711 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-25 17:17:05,711 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-25 17:17:05,712 INFO ]: Initializing TraceAbstraction... [2018-06-25 17:17:05,715 INFO ]: TraceAbstraction initialized [2018-06-25 17:17:05,715 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 05:17:05" (1/3) ... [2018-06-25 17:17:05,716 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14ddf407 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 25.06 05:17:05, skipping insertion in model container [2018-06-25 17:17:05,716 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 05:17:05" (2/3) ... [2018-06-25 17:17:05,716 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14ddf407 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.06 05:17:05, skipping insertion in model container [2018-06-25 17:17:05,717 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 05:17:05" (3/3) ... [2018-06-25 17:17:05,718 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-25 17:17:05,734 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-25 17:17:05,743 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-25 17:17:05,800 INFO ]: Using default assertion order modulation [2018-06-25 17:17:05,801 INFO ]: Interprodecural is true [2018-06-25 17:17:05,801 INFO ]: Hoare is false [2018-06-25 17:17:05,801 INFO ]: Compute interpolants for FPandBP [2018-06-25 17:17:05,801 INFO ]: Backedges is TWOTRACK [2018-06-25 17:17:05,801 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-25 17:17:05,801 INFO ]: Difference is false [2018-06-25 17:17:05,801 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-25 17:17:05,801 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-25 17:17:05,824 INFO ]: Start isEmpty. Operand 10 states. [2018-06-25 17:17:05,844 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-25 17:17:05,844 INFO ]: Found error trace [2018-06-25 17:17:05,858 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-25 17:17:05,858 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 17:17:05,864 INFO ]: Analyzing trace with hash 1284994894, now seen corresponding path program 1 times [2018-06-25 17:17:05,873 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 17:17:05,873 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 17:17:05,966 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 17:17:05,966 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 17:17:05,966 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 17:17:06,050 INFO ]: Conjunction of SSA is unsat [2018-06-25 17:17:06,217 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 17:17:06,219 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-25 17:17:06,219 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-25 17:17:06,226 INFO ]: Interpolant automaton has 3 states [2018-06-25 17:17:06,257 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-25 17:17:06,257 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 17:17:06,264 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-25 17:17:06,350 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 17:17:06,350 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-25 17:17:06,351 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-25 17:17:06,352 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-25 17:17:06,352 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 17:17:06,372 INFO ]: With dead ends: 9 [2018-06-25 17:17:06,372 INFO ]: Without dead ends: 9 [2018-06-25 17:17:06,374 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 [2018-06-25 17:17:06,415 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-25 17:17:06,460 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-25 17:17:06,470 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-25 17:17:06,471 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-25 17:17:06,472 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-25 17:17:06,473 INFO ]: Finished accepts. word is rejected. [2018-06-25 17:17:06,473 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-25 17:17:06,473 INFO ]: Interpolant automaton has 3 states. [2018-06-25 17:17:06,473 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-25 17:17:06,473 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-25 17:17:06,473 INFO ]: Found error trace [2018-06-25 17:17:06,473 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 17:17:06,473 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 17:17:06,473 INFO ]: Analyzing trace with hash 1180964567, now seen corresponding path program 1 times [2018-06-25 17:17:06,474 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 17:17:06,474 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 17:17:06,485 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 17:17:06,485 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 17:17:06,485 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 17:17:06,543 INFO ]: Conjunction of SSA is unsat [2018-06-25 17:17:06,693 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 17:17:06,693 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 17:17:06,694 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 [2018-06-25 17:17:06,735 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 17:17:06,815 INFO ]: Conjunction of SSA is unsat [2018-06-25 17:17:06,825 INFO ]: Computing forward predicates... [2018-06-25 17:17:07,154 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 17:17:07,190 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 17:17:07,190 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-06-25 17:17:07,191 INFO ]: Interpolant automaton has 6 states [2018-06-25 17:17:07,191 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-25 17:17:07,191 INFO ]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-06-25 17:17:07,191 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 6 states. [2018-06-25 17:17:07,427 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 17:17:07,427 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-25 17:17:07,428 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-25 17:17:07,428 INFO ]: Start accepts. Automaton has 6 states. Word has length 8 [2018-06-25 17:17:07,428 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 17:17:07,428 INFO ]: With dead ends: 11 [2018-06-25 17:17:07,428 INFO ]: Without dead ends: 11 [2018-06-25 17:17:07,429 INFO ]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-06-25 17:17:07,429 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-25 17:17:07,431 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-25 17:17:07,431 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-25 17:17:07,431 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-25 17:17:07,431 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-06-25 17:17:07,431 INFO ]: Finished accepts. word is rejected. [2018-06-25 17:17:07,431 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-25 17:17:07,432 INFO ]: Interpolant automaton has 6 states. [2018-06-25 17:17:07,432 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-25 17:17:07,433 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-25 17:17:07,433 INFO ]: Found error trace [2018-06-25 17:17:07,434 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 17:17:07,434 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 17:17:07,434 INFO ]: Analyzing trace with hash 1062095287, now seen corresponding path program 2 times [2018-06-25 17:17:07,434 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 17:17:07,434 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 17:17:07,435 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 17:17:07,435 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 17:17:07,435 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 17:17:07,495 INFO ]: Conjunction of SSA is unsat [2018-06-25 17:17:07,855 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 17:17:07,855 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 17:17:07,855 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 [2018-06-25 17:17:07,872 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-25 17:17:07,928 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-25 17:17:07,928 INFO ]: Conjunction of SSA is unsat [2018-06-25 17:17:07,932 INFO ]: Computing forward predicates... [2018-06-25 17:17:08,468 WARN ]: Spent 119.00 ms on a formula simplification. DAG size of input: 7 DAG size of output: 3 [2018-06-25 17:17:08,876 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 17:17:08,905 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 17:17:08,905 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2018-06-25 17:17:08,905 INFO ]: Interpolant automaton has 10 states [2018-06-25 17:17:08,905 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-25 17:17:08,905 INFO ]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-06-25 17:17:08,905 INFO ]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-06-25 17:17:09,130 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 17:17:09,131 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-25 17:17:09,131 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-25 17:17:09,131 INFO ]: Start accepts. Automaton has 10 states. Word has length 10 [2018-06-25 17:17:09,131 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 17:17:09,131 INFO ]: With dead ends: 9 [2018-06-25 17:17:09,131 INFO ]: Without dead ends: 0 [2018-06-25 17:17:09,131 INFO ]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2018-06-25 17:17:09,132 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-25 17:17:09,132 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-25 17:17:09,132 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-25 17:17:09,132 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-25 17:17:09,132 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 10 [2018-06-25 17:17:09,132 INFO ]: Finished accepts. word is rejected. [2018-06-25 17:17:09,132 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-25 17:17:09,132 INFO ]: Interpolant automaton has 10 states. [2018-06-25 17:17:09,132 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-25 17:17:09,132 INFO ]: Finished isEmpty. No accepting run. [2018-06-25 17:17:09,138 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.06 05:17:09 BoogieIcfgContainer [2018-06-25 17:17:09,138 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-25 17:17:09,140 INFO ]: Toolchain (without parser) took 3904.49 ms. Allocated memory was 310.4 MB in the beginning and 327.7 MB in the end (delta: 17.3 MB). Free memory was 264.8 MB in the beginning and 272.1 MB in the end (delta: -7.4 MB). Peak memory consumption was 9.9 MB. Max. memory is 3.6 GB. [2018-06-25 17:17:09,141 INFO ]: SmtParser took 0.11 ms. Allocated memory is still 310.4 MB. Free memory is still 274.8 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-25 17:17:09,142 INFO ]: ChcToBoogie took 69.39 ms. Allocated memory is still 310.4 MB. Free memory was 264.8 MB in the beginning and 262.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-25 17:17:09,142 INFO ]: Boogie Preprocessor took 44.68 ms. Allocated memory is still 310.4 MB. Free memory was 262.8 MB in the beginning and 260.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-25 17:17:09,143 INFO ]: RCFGBuilder took 354.01 ms. Allocated memory is still 310.4 MB. Free memory was 260.8 MB in the beginning and 252.8 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 3.6 GB. [2018-06-25 17:17:09,144 INFO ]: TraceAbstraction took 3426.43 ms. Allocated memory was 310.4 MB in the beginning and 327.7 MB in the end (delta: 17.3 MB). Free memory was 252.8 MB in the beginning and 272.1 MB in the end (delta: -19.4 MB). There was no memory consumed. Max. memory is 3.6 GB. [2018-06-25 17:17:09,152 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.11 ms. Allocated memory is still 310.4 MB. Free memory is still 274.8 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 69.39 ms. Allocated memory is still 310.4 MB. Free memory was 264.8 MB in the beginning and 262.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 44.68 ms. Allocated memory is still 310.4 MB. Free memory was 262.8 MB in the beginning and 260.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 354.01 ms. Allocated memory is still 310.4 MB. Free memory was 260.8 MB in the beginning and 252.8 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 3426.43 ms. Allocated memory was 310.4 MB in the beginning and 327.7 MB in the end (delta: 17.3 MB). Free memory was 252.8 MB in the beginning and 272.1 MB in the end (delta: -19.4 MB). There was no memory consumed. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [UNKNOWN] : assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. SAFE Result, 3.3s OverallTime, 3 OverallIterations, 3 TraceHistogramMax, 0.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 17 SDtfs, 0 SDslu, 32 SDs, 0 SdLazy, 35 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred 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, 0.2s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 43 NumberOfCodeBlocks, 43 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 38 ConstructedInterpolants, 0 QuantifiedInterpolants, 568 SizeOfPredicates, 6 NumberOfNonLiveVariables, 146 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/stalmark_e7_76.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-25_17-17-09-171.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/stalmark_e7_76.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-25_17-17-09-171.csv Received shutdown request...