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_3_e4_987_e3_291.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-14921ce [2018-06-25 16:46:13,931 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-25 16:46:13,934 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-25 16:46:13,946 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-25 16:46:13,946 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-25 16:46:13,947 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-25 16:46:13,948 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-25 16:46:13,952 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-25 16:46:13,954 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-25 16:46:13,955 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-25 16:46:13,957 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-25 16:46:13,957 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-25 16:46:13,958 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-25 16:46:13,959 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-25 16:46:13,959 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-25 16:46:13,962 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-25 16:46:13,963 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-25 16:46:13,969 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-25 16:46:13,971 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-25 16:46:13,972 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-25 16:46:13,973 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-25 16:46:13,975 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-25 16:46:13,975 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-25 16:46:13,976 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-25 16:46:13,977 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-25 16:46:13,977 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-25 16:46:13,978 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-25 16:46:13,979 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-25 16:46:13,980 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-25 16:46:13,980 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-25 16:46:13,981 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-25 16:46:13,981 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-25 16:46:13,982 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-25 16:46:13,982 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-25 16:46:13,983 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-25 16:46:13,983 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-25 16:46:13,996 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-25 16:46:13,996 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-25 16:46:13,996 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-25 16:46:13,996 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-25 16:46:13,997 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-25 16:46:13,998 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-25 16:46:13,998 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-25 16:46:13,998 INFO L133 SettingsManager]: * Use SBE=true [2018-06-25 16:46:13,998 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-25 16:46:13,998 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-25 16:46:13,999 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-25 16:46:13,999 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-25 16:46:13,999 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-25 16:46:13,999 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-25 16:46:13,999 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-25 16:46:13,999 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-25 16:46:14,000 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-25 16:46:14,000 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-25 16:46:14,000 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-25 16:46:14,000 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-25 16:46:14,000 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-25 16:46:14,002 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-25 16:46:14,002 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-25 16:46:14,053 INFO ]: Repository-Root is: /tmp [2018-06-25 16:46:14,065 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-25 16:46:14,071 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-25 16:46:14,072 INFO ]: Initializing SmtParser... [2018-06-25 16:46:14,073 INFO ]: SmtParser initialized [2018-06-25 16:46:14,073 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_3_e4_987_e3_291.smt2 [2018-06-25 16:46:14,075 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 16:46:14,162 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_3_e4_987_e3_291.smt2 unknown [2018-06-25 16:46:14,558 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_3_e4_987_e3_291.smt2 [2018-06-25 16:46:14,563 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-25 16:46:14,569 INFO ]: Walking toolchain with 4 elements. [2018-06-25 16:46:14,570 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-25 16:46:14,570 INFO ]: Initializing ChcToBoogie... [2018-06-25 16:46:14,570 INFO ]: ChcToBoogie initialized [2018-06-25 16:46:14,573 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 04:46:14" (1/1) ... [2018-06-25 16:46:14,640 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:46:14 Unit [2018-06-25 16:46:14,640 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-25 16:46:14,641 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-25 16:46:14,641 INFO ]: Initializing Boogie Preprocessor... [2018-06-25 16:46:14,641 INFO ]: Boogie Preprocessor initialized [2018-06-25 16:46:14,655 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:46:14" (1/1) ... [2018-06-25 16:46:14,655 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:46:14" (1/1) ... [2018-06-25 16:46:14,663 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:46:14" (1/1) ... [2018-06-25 16:46:14,663 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:46:14" (1/1) ... [2018-06-25 16:46:14,676 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:46:14" (1/1) ... [2018-06-25 16:46:14,677 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:46:14" (1/1) ... [2018-06-25 16:46:14,679 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:46:14" (1/1) ... [2018-06-25 16:46:14,687 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-25 16:46:14,688 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-25 16:46:14,688 INFO ]: Initializing RCFGBuilder... [2018-06-25 16:46:14,688 INFO ]: RCFGBuilder initialized [2018-06-25 16:46:14,689 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:46:14" (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) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-25 16:46:14,703 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-25 16:46:14,704 INFO ]: Found specification of procedure gotoProc [2018-06-25 16:46:14,704 INFO ]: Found implementation of procedure gotoProc [2018-06-25 16:46:14,704 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-25 16:46:14,704 INFO ]: Found specification of procedure Ultimate.START [2018-06-25 16:46:14,704 INFO ]: Found implementation of procedure Ultimate.START [2018-06-25 16:46:15,176 INFO ]: Using library mode [2018-06-25 16:46:15,177 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 04:46:15 BoogieIcfgContainer [2018-06-25 16:46:15,177 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-25 16:46:15,178 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-25 16:46:15,178 INFO ]: Initializing TraceAbstraction... [2018-06-25 16:46:15,183 INFO ]: TraceAbstraction initialized [2018-06-25 16:46:15,183 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 04:46:14" (1/3) ... [2018-06-25 16:46:15,184 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53414431 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 25.06 04:46:15, skipping insertion in model container [2018-06-25 16:46:15,184 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:46:14" (2/3) ... [2018-06-25 16:46:15,184 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53414431 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.06 04:46:15, skipping insertion in model container [2018-06-25 16:46:15,184 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 04:46:15" (3/3) ... [2018-06-25 16:46:15,187 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-25 16:46:15,196 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-25 16:46:15,204 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-25 16:46:15,255 INFO ]: Using default assertion order modulation [2018-06-25 16:46:15,255 INFO ]: Interprodecural is true [2018-06-25 16:46:15,255 INFO ]: Hoare is false [2018-06-25 16:46:15,255 INFO ]: Compute interpolants for FPandBP [2018-06-25 16:46:15,255 INFO ]: Backedges is TWOTRACK [2018-06-25 16:46:15,255 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-25 16:46:15,255 INFO ]: Difference is false [2018-06-25 16:46:15,255 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-25 16:46:15,255 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-25 16:46:15,274 INFO ]: Start isEmpty. Operand 10 states. [2018-06-25 16:46:15,289 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-25 16:46:15,290 INFO ]: Found error trace [2018-06-25 16:46:15,290 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-25 16:46:15,291 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 16:46:15,296 INFO ]: Analyzing trace with hash 1284994894, now seen corresponding path program 1 times [2018-06-25 16:46:15,298 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 16:46:15,299 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 16:46:15,337 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:46:15,337 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 16:46:15,337 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:46:15,444 INFO ]: Conjunction of SSA is unsat [2018-06-25 16:46:15,571 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 16:46:15,572 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-25 16:46:15,572 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-25 16:46:15,574 INFO ]: Interpolant automaton has 3 states [2018-06-25 16:46:15,584 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-25 16:46:15,584 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 16:46:15,587 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-25 16:46:15,674 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 16:46:15,674 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-25 16:46:15,675 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-25 16:46:15,676 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-25 16:46:15,676 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 16:46:15,683 INFO ]: With dead ends: 9 [2018-06-25 16:46:15,683 INFO ]: Without dead ends: 9 [2018-06-25 16:46:15,684 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 16:46:15,698 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-25 16:46:15,730 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-25 16:46:15,732 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-25 16:46:15,732 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-25 16:46:15,733 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-25 16:46:15,733 INFO ]: Finished accepts. word is rejected. [2018-06-25 16:46:15,733 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-25 16:46:15,733 INFO ]: Interpolant automaton has 3 states. [2018-06-25 16:46:15,733 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-25 16:46:15,734 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-25 16:46:15,734 INFO ]: Found error trace [2018-06-25 16:46:15,734 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 16:46:15,734 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 16:46:15,734 INFO ]: Analyzing trace with hash 1180964567, now seen corresponding path program 1 times [2018-06-25 16:46:15,734 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 16:46:15,734 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 16:46:15,735 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:46:15,735 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 16:46:15,735 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:46:15,879 INFO ]: Conjunction of SSA is unsat [2018-06-25 16:46:16,195 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 16:46:16,195 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 16:46:16,195 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 16:46:16,202 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 16:46:16,345 INFO ]: Conjunction of SSA is unsat [2018-06-25 16:46:16,356 INFO ]: Computing forward predicates... [2018-06-25 16:46:16,645 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 16:46:16,679 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 16:46:16,679 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-06-25 16:46:16,679 INFO ]: Interpolant automaton has 6 states [2018-06-25 16:46:16,679 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-25 16:46:16,679 INFO ]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-06-25 16:46:16,680 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 6 states. [2018-06-25 16:46:16,962 WARN ]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-06-25 16:46:17,083 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 16:46:17,083 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-25 16:46:17,084 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-25 16:46:17,084 INFO ]: Start accepts. Automaton has 6 states. Word has length 8 [2018-06-25 16:46:17,084 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 16:46:17,084 INFO ]: With dead ends: 11 [2018-06-25 16:46:17,084 INFO ]: Without dead ends: 11 [2018-06-25 16:46:17,085 INFO ]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-06-25 16:46:17,085 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-25 16:46:17,086 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-25 16:46:17,086 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-25 16:46:17,087 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-25 16:46:17,087 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-06-25 16:46:17,087 INFO ]: Finished accepts. word is rejected. [2018-06-25 16:46:17,087 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-25 16:46:17,087 INFO ]: Interpolant automaton has 6 states. [2018-06-25 16:46:17,087 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-25 16:46:17,087 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-25 16:46:17,087 INFO ]: Found error trace [2018-06-25 16:46:17,087 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 16:46:17,087 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 16:46:17,087 INFO ]: Analyzing trace with hash 1062095287, now seen corresponding path program 2 times [2018-06-25 16:46:17,088 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 16:46:17,088 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 16:46:17,089 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:46:17,089 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 16:46:17,089 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:46:17,244 INFO ]: Conjunction of SSA is unsat [2018-06-25 16:46:17,666 WARN ]: Spent 127.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2018-06-25 16:46:18,300 WARN ]: Spent 559.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2018-06-25 16:46:18,316 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 16:46:18,317 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 16:46:18,317 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 16:46:18,324 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-25 16:46:18,546 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-25 16:46:18,546 INFO ]: Conjunction of SSA is unsat [2018-06-25 16:46:18,554 INFO ]: Computing forward predicates... [2018-06-25 16:46:19,016 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 16:46:19,036 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 16:46:19,036 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2018-06-25 16:46:19,037 INFO ]: Interpolant automaton has 10 states [2018-06-25 16:46:19,037 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-25 16:46:19,037 INFO ]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-06-25 16:46:19,037 INFO ]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-06-25 16:46:19,255 WARN ]: Spent 156.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2018-06-25 16:46:19,365 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 16:46:19,365 INFO ]: Finished difference Result 13 states and 13 transitions. [2018-06-25 16:46:19,367 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-25 16:46:19,367 INFO ]: Start accepts. Automaton has 10 states. Word has length 10 [2018-06-25 16:46:19,367 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 16:46:19,367 INFO ]: With dead ends: 13 [2018-06-25 16:46:19,367 INFO ]: Without dead ends: 13 [2018-06-25 16:46:19,368 INFO ]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2018-06-25 16:46:19,368 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-25 16:46:19,369 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-25 16:46:19,369 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-25 16:46:19,370 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-06-25 16:46:19,370 INFO ]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-06-25 16:46:19,370 INFO ]: Finished accepts. word is rejected. [2018-06-25 16:46:19,370 INFO ]: Abstraction has 13 states and 13 transitions. [2018-06-25 16:46:19,370 INFO ]: Interpolant automaton has 10 states. [2018-06-25 16:46:19,370 INFO ]: Start isEmpty. Operand 13 states and 13 transitions. [2018-06-25 16:46:19,370 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-25 16:46:19,370 INFO ]: Found error trace [2018-06-25 16:46:19,370 INFO ]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 16:46:19,370 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 16:46:19,370 INFO ]: Analyzing trace with hash -1502133097, now seen corresponding path program 3 times [2018-06-25 16:46:19,370 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 16:46:19,371 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 16:46:19,371 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:46:19,371 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 16:46:19,371 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:46:19,549 INFO ]: Conjunction of SSA is unsat [2018-06-25 16:46:20,548 WARN ]: Spent 488.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 17 [2018-06-25 16:46:20,979 WARN ]: Spent 409.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 22 [2018-06-25 16:46:21,593 WARN ]: Spent 574.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 22 [2018-06-25 16:46:21,855 WARN ]: Spent 210.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 32 [2018-06-25 16:46:21,867 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 16:46:21,867 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 16:46:21,867 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 16:46:21,877 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-25 16:46:22,130 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-25 16:46:22,130 INFO ]: Conjunction of SSA is unsat [2018-06-25 16:46:22,139 INFO ]: Computing forward predicates... [2018-06-25 16:46:22,401 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 16:46:22,424 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 16:46:22,424 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2018-06-25 16:46:22,424 INFO ]: Interpolant automaton has 14 states [2018-06-25 16:46:22,424 INFO ]: Constructing interpolant automaton starting with 14 interpolants. [2018-06-25 16:46:22,424 INFO ]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2018-06-25 16:46:22,425 INFO ]: Start difference. First operand 13 states and 13 transitions. Second operand 14 states. [2018-06-25 16:46:22,682 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 16:46:22,682 INFO ]: Finished difference Result 15 states and 15 transitions. [2018-06-25 16:46:22,682 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-25 16:46:22,682 INFO ]: Start accepts. Automaton has 14 states. Word has length 12 [2018-06-25 16:46:22,683 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 16:46:22,683 INFO ]: With dead ends: 15 [2018-06-25 16:46:22,683 INFO ]: Without dead ends: 15 [2018-06-25 16:46:22,683 INFO ]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2018-06-25 16:46:22,683 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-25 16:46:22,684 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-25 16:46:22,684 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-25 16:46:22,685 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-06-25 16:46:22,685 INFO ]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-06-25 16:46:22,685 INFO ]: Finished accepts. word is rejected. [2018-06-25 16:46:22,685 INFO ]: Abstraction has 15 states and 15 transitions. [2018-06-25 16:46:22,685 INFO ]: Interpolant automaton has 14 states. [2018-06-25 16:46:22,685 INFO ]: Start isEmpty. Operand 15 states and 15 transitions. [2018-06-25 16:46:22,685 INFO ]: Finished isEmpty. Found accepting run of length 15 [2018-06-25 16:46:22,685 INFO ]: Found error trace [2018-06-25 16:46:22,685 INFO ]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 16:46:22,685 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 16:46:22,685 INFO ]: Analyzing trace with hash -414382217, now seen corresponding path program 4 times [2018-06-25 16:46:22,685 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 16:46:22,685 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 16:46:22,687 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:46:22,687 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 16:46:22,687 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:46:24,549 INFO ]: Conjunction of SSA is unsat Received shutdown request... [2018-06-25 16:47:22,033 WARN ]: Removed 2 from assertion stack [2018-06-25 16:47:22,033 WARN ]: Verification canceled [2018-06-25 16:47:22,038 WARN ]: Timeout [2018-06-25 16:47:22,038 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.06 04:47:22 BoogieIcfgContainer [2018-06-25 16:47:22,038 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-25 16:47:22,039 INFO ]: Toolchain (without parser) took 67475.31 ms. Allocated memory was 304.1 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 244.5 MB in the beginning and 1.1 GB in the end (delta: -847.3 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-25 16:47:22,040 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 304.1 MB. Free memory is still 268.6 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-25 16:47:22,052 INFO ]: ChcToBoogie took 70.45 ms. Allocated memory is still 304.1 MB. Free memory was 244.5 MB in the beginning and 242.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-25 16:47:22,052 INFO ]: Boogie Preprocessor took 46.53 ms. Allocated memory is still 304.1 MB. Free memory was 242.5 MB in the beginning and 240.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 3.6 GB. [2018-06-25 16:47:22,053 INFO ]: RCFGBuilder took 489.01 ms. Allocated memory is still 304.1 MB. Free memory was 240.4 MB in the beginning and 208.4 MB in the end (delta: 32.0 MB). Peak memory consumption was 32.0 MB. Max. memory is 3.6 GB. [2018-06-25 16:47:22,053 INFO ]: TraceAbstraction took 66859.52 ms. Allocated memory was 304.1 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 208.4 MB in the beginning and 1.1 GB in the end (delta: -883.3 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-25 16:47:22,056 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 304.1 MB. Free memory is still 268.6 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 70.45 ms. Allocated memory is still 304.1 MB. Free memory was 244.5 MB in the beginning and 242.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 46.53 ms. Allocated memory is still 304.1 MB. Free memory was 242.5 MB in the beginning and 240.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 3.6 GB. * RCFGBuilder took 489.01 ms. Allocated memory is still 304.1 MB. Free memory was 240.4 MB in the beginning and 208.4 MB in the end (delta: 32.0 MB). Peak memory consumption was 32.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 66859.52 ms. Allocated memory was 304.1 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 208.4 MB in the beginning and 1.1 GB in the end (delta: -883.3 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [UNKNOWN] : Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 0). Cancelled while BasicCegarLoop was analyzing trace of length 15 with TraceHistMax 7, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 3218. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. TIMEOUT Result, 66.7s OverallTime, 5 OverallIterations, 7 TraceHistogramMax, 1.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 28 SDtfs, 0 SDslu, 90 SDs, 0 SdLazy, 66 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 4.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred in iteration=4, 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, 0.9s SatisfiabilityAnalysisTime, 4.8s InterpolantComputationTime, 67 NumberOfCodeBlocks, 67 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 60 ConstructedInterpolants, 0 QuantifiedInterpolants, 3786 SizeOfPredicates, 8 NumberOfNonLiveVariables, 2895 ConjunctsInSsa, 96 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 0/44 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/metros_3_e4_987_e3_291.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-25_16-47-22-067.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/metros_3_e4_987_e3_291.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-25_16-47-22-067.csv Completed graceful shutdown