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/metros_1_e1_846_e7_397.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-14921ce [2018-06-25 16:28:09,931 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-25 16:28:09,934 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-25 16:28:09,945 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-25 16:28:09,946 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-25 16:28:09,947 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-25 16:28:09,948 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-25 16:28:09,950 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-25 16:28:09,952 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-25 16:28:09,953 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-25 16:28:09,954 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-25 16:28:09,954 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-25 16:28:09,955 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-25 16:28:09,956 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-25 16:28:09,957 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-25 16:28:09,958 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-25 16:28:09,960 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-25 16:28:09,962 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-25 16:28:09,964 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-25 16:28:09,965 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-25 16:28:09,966 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-25 16:28:09,969 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-25 16:28:09,969 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-25 16:28:09,969 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-25 16:28:09,970 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-25 16:28:09,972 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-25 16:28:09,972 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-25 16:28:09,973 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-25 16:28:09,974 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-25 16:28:09,975 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-25 16:28:09,975 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-25 16:28:09,976 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-25 16:28:09,976 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-25 16:28:09,977 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-25 16:28:09,978 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-25 16:28:09,978 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-25 16:28:09,993 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-25 16:28:09,994 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-25 16:28:09,994 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-25 16:28:09,995 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-25 16:28:09,996 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-25 16:28:09,996 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-25 16:28:09,996 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-25 16:28:09,996 INFO L133 SettingsManager]: * Use SBE=true [2018-06-25 16:28:09,997 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-25 16:28:09,997 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-25 16:28:09,997 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-25 16:28:09,998 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-25 16:28:09,998 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-25 16:28:09,998 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-25 16:28:09,998 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-25 16:28:09,999 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-25 16:28:09,999 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-25 16:28:09,999 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-25 16:28:09,999 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-25 16:28:10,000 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-25 16:28:10,000 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-25 16:28:10,001 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-25 16:28:10,002 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-25 16:28:10,041 INFO ]: Repository-Root is: /tmp [2018-06-25 16:28:10,059 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-25 16:28:10,064 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-25 16:28:10,066 INFO ]: Initializing SmtParser... [2018-06-25 16:28:10,066 INFO ]: SmtParser initialized [2018-06-25 16:28:10,067 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_1_e1_846_e7_397.smt2 [2018-06-25 16:28:10,068 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 16:28:10,166 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_1_e1_846_e7_397.smt2 unknown [2018-06-25 16:28:10,637 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_1_e1_846_e7_397.smt2 [2018-06-25 16:28:10,642 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-25 16:28:10,657 INFO ]: Walking toolchain with 4 elements. [2018-06-25 16:28:10,657 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-25 16:28:10,657 INFO ]: Initializing ChcToBoogie... [2018-06-25 16:28:10,657 INFO ]: ChcToBoogie initialized [2018-06-25 16:28:10,660 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 04:28:10" (1/1) ... [2018-06-25 16:28:10,743 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:28:10 Unit [2018-06-25 16:28:10,743 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-25 16:28:10,744 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-25 16:28:10,744 INFO ]: Initializing Boogie Preprocessor... [2018-06-25 16:28:10,744 INFO ]: Boogie Preprocessor initialized [2018-06-25 16:28:10,758 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:28:10" (1/1) ... [2018-06-25 16:28:10,758 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:28:10" (1/1) ... [2018-06-25 16:28:10,768 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:28:10" (1/1) ... [2018-06-25 16:28:10,768 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:28:10" (1/1) ... [2018-06-25 16:28:10,775 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:28:10" (1/1) ... [2018-06-25 16:28:10,777 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:28:10" (1/1) ... [2018-06-25 16:28:10,779 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:28:10" (1/1) ... [2018-06-25 16:28:10,783 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-25 16:28:10,784 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-25 16:28:10,784 INFO ]: Initializing RCFGBuilder... [2018-06-25 16:28:10,784 INFO ]: RCFGBuilder initialized [2018-06-25 16:28:10,785 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:28:10" (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 16:28:10,801 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-25 16:28:10,801 INFO ]: Found specification of procedure gotoProc [2018-06-25 16:28:10,801 INFO ]: Found implementation of procedure gotoProc [2018-06-25 16:28:10,801 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-25 16:28:10,801 INFO ]: Found specification of procedure Ultimate.START [2018-06-25 16:28:10,801 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 16:28:11,206 INFO ]: Using library mode [2018-06-25 16:28:11,207 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 04:28:11 BoogieIcfgContainer [2018-06-25 16:28:11,207 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-25 16:28:11,210 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-25 16:28:11,211 INFO ]: Initializing TraceAbstraction... [2018-06-25 16:28:11,214 INFO ]: TraceAbstraction initialized [2018-06-25 16:28:11,214 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 04:28:10" (1/3) ... [2018-06-25 16:28:11,215 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f69455a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 25.06 04:28:11, skipping insertion in model container [2018-06-25 16:28:11,215 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:28:10" (2/3) ... [2018-06-25 16:28:11,215 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f69455a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.06 04:28:11, skipping insertion in model container [2018-06-25 16:28:11,215 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 04:28:11" (3/3) ... [2018-06-25 16:28:11,218 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-25 16:28:11,229 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-25 16:28:11,241 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-25 16:28:11,299 INFO ]: Using default assertion order modulation [2018-06-25 16:28:11,300 INFO ]: Interprodecural is true [2018-06-25 16:28:11,300 INFO ]: Hoare is false [2018-06-25 16:28:11,300 INFO ]: Compute interpolants for FPandBP [2018-06-25 16:28:11,300 INFO ]: Backedges is TWOTRACK [2018-06-25 16:28:11,300 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-25 16:28:11,300 INFO ]: Difference is false [2018-06-25 16:28:11,300 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-25 16:28:11,300 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-25 16:28:11,316 INFO ]: Start isEmpty. Operand 10 states. [2018-06-25 16:28:11,327 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-25 16:28:11,327 INFO ]: Found error trace [2018-06-25 16:28:11,331 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-25 16:28:11,331 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 16:28:11,335 INFO ]: Analyzing trace with hash 1285054476, now seen corresponding path program 1 times [2018-06-25 16:28:11,337 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 16:28:11,337 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 16:28:11,370 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:28:11,370 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 16:28:11,370 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:28:11,463 INFO ]: Conjunction of SSA is unsat [2018-06-25 16:28:11,597 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 16:28:11,599 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-25 16:28:11,599 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-25 16:28:11,600 INFO ]: Interpolant automaton has 3 states [2018-06-25 16:28:11,611 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-25 16:28:11,611 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 16:28:11,613 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-25 16:28:11,683 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 16:28:11,685 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-25 16:28:11,685 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-25 16:28:11,687 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-25 16:28:11,687 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 16:28:11,698 INFO ]: With dead ends: 9 [2018-06-25 16:28:11,698 INFO ]: Without dead ends: 9 [2018-06-25 16:28:11,700 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 16:28:11,713 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-25 16:28:11,740 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-25 16:28:11,742 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-25 16:28:11,743 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-25 16:28:11,744 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-25 16:28:11,744 INFO ]: Finished accepts. word is rejected. [2018-06-25 16:28:11,744 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-25 16:28:11,744 INFO ]: Interpolant automaton has 3 states. [2018-06-25 16:28:11,744 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-25 16:28:11,745 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-25 16:28:11,745 INFO ]: Found error trace [2018-06-25 16:28:11,745 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 16:28:11,745 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 16:28:11,745 INFO ]: Analyzing trace with hash 1180100628, now seen corresponding path program 1 times [2018-06-25 16:28:11,745 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 16:28:11,745 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 16:28:11,746 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:28:11,746 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 16:28:11,746 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:28:11,884 INFO ]: Conjunction of SSA is unsat [2018-06-25 16:28:12,160 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 16:28:12,161 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 16:28:12,161 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 16:28:12,175 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 16:28:12,334 INFO ]: Conjunction of SSA is unsat [2018-06-25 16:28:12,345 INFO ]: Computing forward predicates... [2018-06-25 16:28:12,521 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 16:28:12,542 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 16:28:12,543 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-25 16:28:12,543 INFO ]: Interpolant automaton has 5 states [2018-06-25 16:28:12,543 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-25 16:28:12,543 INFO ]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-06-25 16:28:12,544 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-06-25 16:28:12,674 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 16:28:12,674 INFO ]: Finished difference Result 10 states and 10 transitions. [2018-06-25 16:28:12,675 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-25 16:28:12,675 INFO ]: Start accepts. Automaton has 5 states. Word has length 8 [2018-06-25 16:28:12,675 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 16:28:12,676 INFO ]: With dead ends: 10 [2018-06-25 16:28:12,676 INFO ]: Without dead ends: 10 [2018-06-25 16:28:12,676 INFO ]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-06-25 16:28:12,677 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-25 16:28:12,678 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-25 16:28:12,678 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-25 16:28:12,678 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-06-25 16:28:12,678 INFO ]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-06-25 16:28:12,678 INFO ]: Finished accepts. word is rejected. [2018-06-25 16:28:12,678 INFO ]: Abstraction has 10 states and 10 transitions. [2018-06-25 16:28:12,678 INFO ]: Interpolant automaton has 5 states. [2018-06-25 16:28:12,678 INFO ]: Start isEmpty. Operand 10 states and 10 transitions. [2018-06-25 16:28:12,678 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-25 16:28:12,678 INFO ]: Found error trace [2018-06-25 16:28:12,679 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 16:28:12,679 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 16:28:12,680 INFO ]: Analyzing trace with hash -2073468660, now seen corresponding path program 2 times [2018-06-25 16:28:12,680 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 16:28:12,680 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 16:28:12,681 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:28:12,681 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 16:28:12,681 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:28:12,762 INFO ]: Conjunction of SSA is unsat [2018-06-25 16:28:12,963 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 16:28:12,963 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 16:28:12,963 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 16:28:12,970 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-25 16:28:13,137 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-25 16:28:13,137 INFO ]: Conjunction of SSA is unsat [2018-06-25 16:28:13,143 INFO ]: Computing forward predicates... [2018-06-25 16:28:13,743 WARN ]: Spent 213.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 3 [2018-06-25 16:28:13,760 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 16:28:13,787 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 16:28:13,787 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2018-06-25 16:28:13,788 INFO ]: Interpolant automaton has 7 states [2018-06-25 16:28:13,788 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-25 16:28:13,788 INFO ]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-06-25 16:28:13,788 INFO ]: Start difference. First operand 10 states and 10 transitions. Second operand 7 states. [2018-06-25 16:28:13,885 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 16:28:13,885 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-25 16:28:13,887 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-25 16:28:13,887 INFO ]: Start accepts. Automaton has 7 states. Word has length 9 [2018-06-25 16:28:13,887 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 16:28:13,887 INFO ]: With dead ends: 11 [2018-06-25 16:28:13,887 INFO ]: Without dead ends: 11 [2018-06-25 16:28:13,888 INFO ]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-06-25 16:28:13,888 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-25 16:28:13,889 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-25 16:28:13,889 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-25 16:28:13,889 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-25 16:28:13,889 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-06-25 16:28:13,889 INFO ]: Finished accepts. word is rejected. [2018-06-25 16:28:13,889 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-25 16:28:13,889 INFO ]: Interpolant automaton has 7 states. [2018-06-25 16:28:13,890 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-25 16:28:13,890 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-25 16:28:13,890 INFO ]: Found error trace [2018-06-25 16:28:13,890 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 16:28:13,890 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 16:28:13,890 INFO ]: Analyzing trace with hash 145098516, now seen corresponding path program 3 times [2018-06-25 16:28:13,890 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 16:28:13,890 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 16:28:13,891 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:28:13,891 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 16:28:13,891 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:28:14,092 INFO ]: Conjunction of SSA is unsat [2018-06-25 16:28:14,790 WARN ]: Spent 411.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 19 [2018-06-25 16:28:14,967 WARN ]: Spent 143.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2018-06-25 16:28:14,977 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 16:28:14,977 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 16:28:14,977 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 16:28:14,983 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-25 16:28:15,148 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-25 16:28:15,148 INFO ]: Conjunction of SSA is unsat [2018-06-25 16:28:15,156 INFO ]: Computing forward predicates... [2018-06-25 16:28:15,818 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 16:28:15,842 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 16:28:15,842 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2018-06-25 16:28:15,843 INFO ]: Interpolant automaton has 10 states [2018-06-25 16:28:15,843 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-25 16:28:15,843 INFO ]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2018-06-25 16:28:15,843 INFO ]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-06-25 16:28:16,047 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 16:28:16,047 INFO ]: Finished difference Result 6 states and 5 transitions. [2018-06-25 16:28:16,048 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-25 16:28:16,048 INFO ]: Start accepts. Automaton has 10 states. Word has length 10 [2018-06-25 16:28:16,049 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 16:28:16,049 INFO ]: With dead ends: 6 [2018-06-25 16:28:16,049 INFO ]: Without dead ends: 0 [2018-06-25 16:28:16,049 INFO ]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2018-06-25 16:28:16,049 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-25 16:28:16,049 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-25 16:28:16,049 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-25 16:28:16,049 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-25 16:28:16,049 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 10 [2018-06-25 16:28:16,050 INFO ]: Finished accepts. word is rejected. [2018-06-25 16:28:16,050 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-25 16:28:16,050 INFO ]: Interpolant automaton has 10 states. [2018-06-25 16:28:16,050 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-25 16:28:16,050 INFO ]: Finished isEmpty. No accepting run. [2018-06-25 16:28:16,058 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.06 04:28:16 BoogieIcfgContainer [2018-06-25 16:28:16,058 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-25 16:28:16,062 INFO ]: Toolchain (without parser) took 5419.39 ms. Allocated memory was 309.3 MB in the beginning and 391.1 MB in the end (delta: 81.8 MB). Free memory was 249.7 MB in the beginning and 340.1 MB in the end (delta: -90.4 MB). There was no memory consumed. Max. memory is 3.6 GB. [2018-06-25 16:28:16,063 INFO ]: SmtParser took 0.08 ms. Allocated memory is still 309.3 MB. Free memory is still 274.8 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-25 16:28:16,063 INFO ]: ChcToBoogie took 86.34 ms. Allocated memory is still 309.3 MB. Free memory was 249.7 MB in the beginning and 246.7 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. [2018-06-25 16:28:16,064 INFO ]: Boogie Preprocessor took 39.23 ms. Allocated memory is still 309.3 MB. Free memory was 246.7 MB in the beginning and 245.7 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. [2018-06-25 16:28:16,064 INFO ]: RCFGBuilder took 423.27 ms. Allocated memory is still 309.3 MB. Free memory was 245.7 MB in the beginning and 213.3 MB in the end (delta: 32.5 MB). Peak memory consumption was 32.5 MB. Max. memory is 3.6 GB. [2018-06-25 16:28:16,074 INFO ]: TraceAbstraction took 4847.67 ms. Allocated memory was 309.3 MB in the beginning and 391.1 MB in the end (delta: 81.8 MB). Free memory was 212.3 MB in the beginning and 340.1 MB in the end (delta: -127.8 MB). There was no memory consumed. Max. memory is 3.6 GB. [2018-06-25 16:28:16,077 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.08 ms. Allocated memory is still 309.3 MB. Free memory is still 274.8 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 86.34 ms. Allocated memory is still 309.3 MB. Free memory was 249.7 MB in the beginning and 246.7 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 39.23 ms. Allocated memory is still 309.3 MB. Free memory was 246.7 MB in the beginning and 245.7 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. * RCFGBuilder took 423.27 ms. Allocated memory is still 309.3 MB. Free memory was 245.7 MB in the beginning and 213.3 MB in the end (delta: 32.5 MB). Peak memory consumption was 32.5 MB. Max. memory is 3.6 GB. * TraceAbstraction took 4847.67 ms. Allocated memory was 309.3 MB in the beginning and 391.1 MB in the end (delta: 81.8 MB). Free memory was 212.3 MB in the beginning and 340.1 MB in the end (delta: -127.8 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, 4.7s OverallTime, 4 OverallIterations, 3 TraceHistogramMax, 0.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 24 SDtfs, 0 SDslu, 51 SDs, 0 SdLazy, 48 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred 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: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 2.9s InterpolantComputationTime, 61 NumberOfCodeBlocks, 61 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 54 ConstructedInterpolants, 0 QuantifiedInterpolants, 1359 SizeOfPredicates, 16 NumberOfNonLiveVariables, 2238 ConjunctsInSsa, 75 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 0/20 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/metros_1_e1_846_e7_397.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-25_16-28-16-095.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/metros_1_e1_846_e7_397.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-25_16-28-16-095.csv Received shutdown request...