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/ex3_e7_590_e7_590.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-14921ce [2018-06-25 15:03:18,728 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-25 15:03:18,730 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-25 15:03:18,743 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-25 15:03:18,743 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-25 15:03:18,746 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-25 15:03:18,747 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-25 15:03:18,749 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-25 15:03:18,750 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-25 15:03:18,751 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-25 15:03:18,751 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-25 15:03:18,752 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-25 15:03:18,752 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-25 15:03:18,753 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-25 15:03:18,754 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-25 15:03:18,757 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-25 15:03:18,759 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-25 15:03:18,761 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-25 15:03:18,769 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-25 15:03:18,770 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-25 15:03:18,771 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-25 15:03:18,774 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-25 15:03:18,775 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-25 15:03:18,775 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-25 15:03:18,775 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-25 15:03:18,776 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-25 15:03:18,777 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-25 15:03:18,778 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-25 15:03:18,779 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-25 15:03:18,779 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-25 15:03:18,779 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-25 15:03:18,780 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-25 15:03:18,780 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-25 15:03:18,781 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-25 15:03:18,781 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-25 15:03:18,782 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-25 15:03:18,805 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-25 15:03:18,805 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-25 15:03:18,805 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-25 15:03:18,805 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-25 15:03:18,806 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-25 15:03:18,806 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-25 15:03:18,811 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-25 15:03:18,811 INFO L133 SettingsManager]: * Use SBE=true [2018-06-25 15:03:18,812 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-25 15:03:18,812 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-25 15:03:18,812 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-25 15:03:18,812 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-25 15:03:18,812 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-25 15:03:18,812 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-25 15:03:18,813 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-25 15:03:18,813 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-25 15:03:18,813 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-25 15:03:18,813 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-25 15:03:18,813 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-25 15:03:18,813 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-25 15:03:18,814 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-25 15:03:18,815 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-25 15:03:18,815 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-25 15:03:18,875 INFO ]: Repository-Root is: /tmp [2018-06-25 15:03:18,889 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-25 15:03:18,895 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-25 15:03:18,897 INFO ]: Initializing SmtParser... [2018-06-25 15:03:18,897 INFO ]: SmtParser initialized [2018-06-25 15:03:18,897 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/ex3_e7_590_e7_590.smt2 [2018-06-25 15:03:18,898 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 15:03:18,989 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/ex3_e7_590_e7_590.smt2 unknown [2018-06-25 15:03:19,285 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/ex3_e7_590_e7_590.smt2 [2018-06-25 15:03:19,290 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-25 15:03:19,296 INFO ]: Walking toolchain with 4 elements. [2018-06-25 15:03:19,297 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-25 15:03:19,297 INFO ]: Initializing ChcToBoogie... [2018-06-25 15:03:19,297 INFO ]: ChcToBoogie initialized [2018-06-25 15:03:19,300 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 03:03:19" (1/1) ... [2018-06-25 15:03:19,346 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 03:03:19 Unit [2018-06-25 15:03:19,346 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-25 15:03:19,347 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-25 15:03:19,347 INFO ]: Initializing Boogie Preprocessor... [2018-06-25 15:03:19,347 INFO ]: Boogie Preprocessor initialized [2018-06-25 15:03:19,365 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 03:03:19" (1/1) ... [2018-06-25 15:03:19,365 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 03:03:19" (1/1) ... [2018-06-25 15:03:19,370 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 03:03:19" (1/1) ... [2018-06-25 15:03:19,370 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 03:03:19" (1/1) ... [2018-06-25 15:03:19,373 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 03:03:19" (1/1) ... [2018-06-25 15:03:19,375 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 03:03:19" (1/1) ... [2018-06-25 15:03:19,376 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 03:03:19" (1/1) ... [2018-06-25 15:03:19,378 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-25 15:03:19,378 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-25 15:03:19,379 INFO ]: Initializing RCFGBuilder... [2018-06-25 15:03:19,379 INFO ]: RCFGBuilder initialized [2018-06-25 15:03:19,379 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 03:03:19" (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 15:03:19,389 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-25 15:03:19,389 INFO ]: Found specification of procedure gotoProc [2018-06-25 15:03:19,389 INFO ]: Found implementation of procedure gotoProc [2018-06-25 15:03:19,389 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-25 15:03:19,389 INFO ]: Found specification of procedure Ultimate.START [2018-06-25 15:03:19,389 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 15:03:19,677 INFO ]: Using library mode [2018-06-25 15:03:19,677 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 03:03:19 BoogieIcfgContainer [2018-06-25 15:03:19,677 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-25 15:03:19,680 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-25 15:03:19,680 INFO ]: Initializing TraceAbstraction... [2018-06-25 15:03:19,683 INFO ]: TraceAbstraction initialized [2018-06-25 15:03:19,683 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 03:03:19" (1/3) ... [2018-06-25 15:03:19,684 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13137c7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 25.06 03:03:19, skipping insertion in model container [2018-06-25 15:03:19,684 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 03:03:19" (2/3) ... [2018-06-25 15:03:19,684 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13137c7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.06 03:03:19, skipping insertion in model container [2018-06-25 15:03:19,684 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 03:03:19" (3/3) ... [2018-06-25 15:03:19,686 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-25 15:03:19,695 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-25 15:03:19,704 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-25 15:03:19,743 INFO ]: Using default assertion order modulation [2018-06-25 15:03:19,743 INFO ]: Interprodecural is true [2018-06-25 15:03:19,743 INFO ]: Hoare is false [2018-06-25 15:03:19,743 INFO ]: Compute interpolants for FPandBP [2018-06-25 15:03:19,743 INFO ]: Backedges is TWOTRACK [2018-06-25 15:03:19,743 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-25 15:03:19,744 INFO ]: Difference is false [2018-06-25 15:03:19,744 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-25 15:03:19,744 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-25 15:03:19,755 INFO ]: Start isEmpty. Operand 10 states. [2018-06-25 15:03:19,767 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-25 15:03:19,767 INFO ]: Found error trace [2018-06-25 15:03:19,771 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-25 15:03:19,771 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 15:03:19,781 INFO ]: Analyzing trace with hash 1285054476, now seen corresponding path program 1 times [2018-06-25 15:03:19,783 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 15:03:19,784 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 15:03:19,824 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 15:03:19,825 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 15:03:19,825 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 15:03:19,890 INFO ]: Conjunction of SSA is unsat [2018-06-25 15:03:19,982 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 15:03:19,983 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-25 15:03:19,983 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-25 15:03:19,985 INFO ]: Interpolant automaton has 3 states [2018-06-25 15:03:19,995 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-25 15:03:19,995 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 15:03:19,997 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-25 15:03:20,057 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 15:03:20,057 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-25 15:03:20,057 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-25 15:03:20,058 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-25 15:03:20,059 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 15:03:20,067 INFO ]: With dead ends: 9 [2018-06-25 15:03:20,067 INFO ]: Without dead ends: 9 [2018-06-25 15:03:20,069 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 15:03:20,086 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-25 15:03:20,103 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-25 15:03:20,104 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-25 15:03:20,104 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-25 15:03:20,106 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-25 15:03:20,106 INFO ]: Finished accepts. word is rejected. [2018-06-25 15:03:20,106 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-25 15:03:20,106 INFO ]: Interpolant automaton has 3 states. [2018-06-25 15:03:20,106 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-25 15:03:20,106 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-25 15:03:20,106 INFO ]: Found error trace [2018-06-25 15:03:20,106 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 15:03:20,106 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 15:03:20,107 INFO ]: Analyzing trace with hash 1180100628, now seen corresponding path program 1 times [2018-06-25 15:03:20,107 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 15:03:20,107 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 15:03:20,107 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 15:03:20,108 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 15:03:20,108 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 15:03:20,137 INFO ]: Conjunction of SSA is unsat [2018-06-25 15:03:20,213 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 15:03:20,213 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 15:03:20,213 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 15:03:20,220 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 15:03:20,306 INFO ]: Conjunction of SSA is unsat [2018-06-25 15:03:20,317 INFO ]: Computing forward predicates... [2018-06-25 15:03:20,556 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 15:03:20,589 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 15:03:20,589 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-25 15:03:20,589 INFO ]: Interpolant automaton has 5 states [2018-06-25 15:03:20,589 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-25 15:03:20,589 INFO ]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-06-25 15:03:20,590 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-06-25 15:03:20,649 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 15:03:20,649 INFO ]: Finished difference Result 10 states and 10 transitions. [2018-06-25 15:03:20,650 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-25 15:03:20,650 INFO ]: Start accepts. Automaton has 5 states. Word has length 8 [2018-06-25 15:03:20,650 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 15:03:20,650 INFO ]: With dead ends: 10 [2018-06-25 15:03:20,650 INFO ]: Without dead ends: 10 [2018-06-25 15:03:20,651 INFO ]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-06-25 15:03:20,651 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-25 15:03:20,652 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-25 15:03:20,652 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-25 15:03:20,652 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-06-25 15:03:20,652 INFO ]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-06-25 15:03:20,652 INFO ]: Finished accepts. word is rejected. [2018-06-25 15:03:20,652 INFO ]: Abstraction has 10 states and 10 transitions. [2018-06-25 15:03:20,652 INFO ]: Interpolant automaton has 5 states. [2018-06-25 15:03:20,652 INFO ]: Start isEmpty. Operand 10 states and 10 transitions. [2018-06-25 15:03:20,653 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-25 15:03:20,653 INFO ]: Found error trace [2018-06-25 15:03:20,653 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 15:03:20,653 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 15:03:20,653 INFO ]: Analyzing trace with hash -2073468660, now seen corresponding path program 2 times [2018-06-25 15:03:20,653 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 15:03:20,653 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 15:03:20,654 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 15:03:20,654 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 15:03:20,654 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 15:03:20,717 INFO ]: Conjunction of SSA is unsat [2018-06-25 15:03:21,363 WARN ]: Spent 419.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 22 [2018-06-25 15:03:21,456 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 15:03:21,457 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 15:03:21,457 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 15:03:21,463 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-25 15:03:21,524 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-25 15:03:21,524 INFO ]: Conjunction of SSA is unsat [2018-06-25 15:03:21,528 INFO ]: Computing forward predicates... [2018-06-25 15:03:22,287 WARN ]: Spent 497.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2018-06-25 15:03:22,620 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 15:03:22,640 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 15:03:22,640 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2018-06-25 15:03:22,640 INFO ]: Interpolant automaton has 8 states [2018-06-25 15:03:22,640 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-25 15:03:22,640 INFO ]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2018-06-25 15:03:22,641 INFO ]: Start difference. First operand 10 states and 10 transitions. Second operand 8 states. [2018-06-25 15:03:22,963 WARN ]: Spent 307.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2018-06-25 15:03:23,015 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 15:03:23,015 INFO ]: Finished difference Result 12 states and 12 transitions. [2018-06-25 15:03:23,015 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-25 15:03:23,015 INFO ]: Start accepts. Automaton has 8 states. Word has length 9 [2018-06-25 15:03:23,015 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 15:03:23,016 INFO ]: With dead ends: 12 [2018-06-25 15:03:23,016 INFO ]: Without dead ends: 12 [2018-06-25 15:03:23,016 INFO ]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-06-25 15:03:23,016 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-25 15:03:23,017 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-06-25 15:03:23,017 INFO ]: Start removeUnreachable. Operand 12 states. [2018-06-25 15:03:23,017 INFO ]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-06-25 15:03:23,017 INFO ]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2018-06-25 15:03:23,018 INFO ]: Finished accepts. word is rejected. [2018-06-25 15:03:23,018 INFO ]: Abstraction has 12 states and 12 transitions. [2018-06-25 15:03:23,018 INFO ]: Interpolant automaton has 8 states. [2018-06-25 15:03:23,018 INFO ]: Start isEmpty. Operand 12 states and 12 transitions. [2018-06-25 15:03:23,018 INFO ]: Finished isEmpty. Found accepting run of length 12 [2018-06-25 15:03:23,018 INFO ]: Found error trace [2018-06-25 15:03:23,018 INFO ]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 15:03:23,018 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 15:03:23,018 INFO ]: Analyzing trace with hash 201204236, now seen corresponding path program 3 times [2018-06-25 15:03:23,018 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 15:03:23,018 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 15:03:23,019 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 15:03:23,019 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 15:03:23,019 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 15:03:23,087 INFO ]: Conjunction of SSA is unsat [2018-06-25 15:03:23,328 WARN ]: Spent 159.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 5 [2018-06-25 15:03:23,344 INFO ]: Checked inductivity of 10 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-25 15:03:23,344 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 15:03:23,344 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 [2018-06-25 15:03:23,350 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-25 15:03:23,443 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-25 15:03:23,443 INFO ]: Conjunction of SSA is unsat [2018-06-25 15:03:23,447 INFO ]: Computing forward predicates... [2018-06-25 15:03:23,639 WARN ]: expecting exponential blowup for input size 7 [2018-06-25 15:03:23,673 WARN ]: expecting exponential blowup for input size 7 [2018-06-25 15:03:23,721 WARN ]: expecting exponential blowup for input size 7 [2018-06-25 15:03:23,878 INFO ]: Checked inductivity of 10 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-25 15:03:23,899 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 15:03:23,899 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-06-25 15:03:23,900 INFO ]: Interpolant automaton has 6 states [2018-06-25 15:03:23,900 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-25 15:03:23,900 INFO ]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-06-25 15:03:23,900 INFO ]: Start difference. First operand 12 states and 12 transitions. Second operand 6 states. [2018-06-25 15:03:23,957 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 15:03:23,957 INFO ]: Finished difference Result 5 states and 4 transitions. [2018-06-25 15:03:23,957 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-25 15:03:23,957 INFO ]: Start accepts. Automaton has 6 states. Word has length 11 [2018-06-25 15:03:23,958 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 15:03:23,958 INFO ]: With dead ends: 5 [2018-06-25 15:03:23,958 INFO ]: Without dead ends: 0 [2018-06-25 15:03:23,958 INFO ]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-06-25 15:03:23,958 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-25 15:03:23,958 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-25 15:03:23,958 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-25 15:03:23,958 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-25 15:03:23,958 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 11 [2018-06-25 15:03:23,958 INFO ]: Finished accepts. word is rejected. [2018-06-25 15:03:23,958 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-25 15:03:23,958 INFO ]: Interpolant automaton has 6 states. [2018-06-25 15:03:23,958 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-25 15:03:23,958 INFO ]: Finished isEmpty. No accepting run. [2018-06-25 15:03:23,963 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.06 03:03:23 BoogieIcfgContainer [2018-06-25 15:03:23,964 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-25 15:03:23,964 INFO ]: Toolchain (without parser) took 4672.91 ms. Allocated memory was 309.3 MB in the beginning and 342.4 MB in the end (delta: 33.0 MB). Free memory was 261.7 MB in the beginning and 211.0 MB in the end (delta: 50.7 MB). Peak memory consumption was 83.7 MB. Max. memory is 3.6 GB. [2018-06-25 15:03:23,965 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 309.3 MB. Free memory is still 273.8 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-25 15:03:23,965 INFO ]: ChcToBoogie took 49.80 ms. Allocated memory is still 309.3 MB. Free memory was 261.7 MB in the beginning and 257.7 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 3.6 GB. [2018-06-25 15:03:23,966 INFO ]: Boogie Preprocessor took 31.32 ms. Allocated memory is still 309.3 MB. Free memory is still 257.7 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-25 15:03:23,966 INFO ]: RCFGBuilder took 298.66 ms. Allocated memory is still 309.3 MB. Free memory was 257.7 MB in the beginning and 243.8 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 3.6 GB. [2018-06-25 15:03:23,967 INFO ]: TraceAbstraction took 4283.52 ms. Allocated memory was 309.3 MB in the beginning and 342.4 MB in the end (delta: 33.0 MB). Free memory was 243.8 MB in the beginning and 211.0 MB in the end (delta: 32.7 MB). Peak memory consumption was 65.8 MB. Max. memory is 3.6 GB. [2018-06-25 15:03:23,976 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.07 ms. Allocated memory is still 309.3 MB. Free memory is still 273.8 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 49.80 ms. Allocated memory is still 309.3 MB. Free memory was 261.7 MB in the beginning and 257.7 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 31.32 ms. Allocated memory is still 309.3 MB. Free memory is still 257.7 MB. There was no memory consumed. Max. memory is 3.6 GB. * RCFGBuilder took 298.66 ms. Allocated memory is still 309.3 MB. Free memory was 257.7 MB in the beginning and 243.8 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 4283.52 ms. Allocated memory was 309.3 MB in the beginning and 342.4 MB in the end (delta: 33.0 MB). Free memory was 243.8 MB in the beginning and 211.0 MB in the end (delta: 32.7 MB). Peak memory consumption was 65.8 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, 10 locations, 1 error locations. SAFE Result, 4.2s OverallTime, 4 OverallIterations, 4 TraceHistogramMax, 0.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 24 SDtfs, 0 SDslu, 48 SDs, 0 SdLazy, 33 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 2.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12occurred 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, 0.3s SatisfiabilityAnalysisTime, 2.9s InterpolantComputationTime, 63 NumberOfCodeBlocks, 63 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 56 ConstructedInterpolants, 0 QuantifiedInterpolants, 1751 SizeOfPredicates, 12 NumberOfNonLiveVariables, 861 ConjunctsInSsa, 92 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 18/28 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/ex3_e7_590_e7_590.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-25_15-03-23-986.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ex3_e7_590_e7_590.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-25_15-03-23-986.csv Received shutdown request...