java -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/chccomp2018/chcToBoogie_automizer.epf -i /storage/chc-comp/vmt-chc-benchmarks/lustre/ex3_e8_381_e8_477.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-55b8104 [2018-06-18 14:59:24,374 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-18 14:59:24,376 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-18 14:59:24,388 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-18 14:59:24,389 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-18 14:59:24,390 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-18 14:59:24,391 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-18 14:59:24,393 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-18 14:59:24,395 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-18 14:59:24,396 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-18 14:59:24,397 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-18 14:59:24,397 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-18 14:59:24,398 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-18 14:59:24,399 INFO L177 SettingsManager]: ChcToBoogie provides no preferences, ignoring... [2018-06-18 14:59:24,400 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-18 14:59:24,401 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-18 14:59:24,403 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-18 14:59:24,405 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-18 14:59:24,406 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-18 14:59:24,407 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-18 14:59:24,409 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-18 14:59:24,411 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-18 14:59:24,412 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-18 14:59:24,412 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-18 14:59:24,413 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-18 14:59:24,414 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-18 14:59:24,415 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-18 14:59:24,416 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-18 14:59:24,417 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-18 14:59:24,417 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-18 14:59:24,418 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-18 14:59:24,419 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-18 14:59:24,419 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-18 14:59:24,420 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-18 14:59:24,420 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-18 14:59:24,421 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chccomp2018/chcToBoogie_automizer.epf [2018-06-18 14:59:24,435 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-18 14:59:24,435 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-18 14:59:24,435 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-18 14:59:24,436 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-18 14:59:24,437 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-18 14:59:24,438 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-18 14:59:24,438 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-18 14:59:24,438 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-18 14:59:24,438 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-18 14:59:24,438 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-18 14:59:24,439 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-18 14:59:24,439 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-18 14:59:24,439 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-18 14:59:24,439 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-18 14:59:24,439 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-18 14:59:24,440 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-18 14:59:24,440 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-18 14:59:24,441 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-18 14:59:24,442 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-18 14:59:24,494 INFO ]: Repository-Root is: /tmp [2018-06-18 14:59:24,515 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-18 14:59:24,521 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-18 14:59:24,522 INFO ]: Initializing SmtParser... [2018-06-18 14:59:24,523 INFO ]: SmtParser initialized [2018-06-18 14:59:24,523 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/ex3_e8_381_e8_477.smt2 [2018-06-18 14:59:24,525 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 [2018-06-18 14:59:24,628 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/ex3_e8_381_e8_477.smt2 unknown [2018-06-18 14:59:24,948 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/ex3_e8_381_e8_477.smt2 [2018-06-18 14:59:24,953 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-18 14:59:24,969 INFO ]: Walking toolchain with 4 elements. [2018-06-18 14:59:24,969 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-18 14:59:24,969 INFO ]: Initializing ChcToBoogie... [2018-06-18 14:59:24,969 INFO ]: ChcToBoogie initialized [2018-06-18 14:59:24,983 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 02:59:24" (1/1) ... [2018-06-18 14:59:25,056 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 02:59:25 Unit [2018-06-18 14:59:25,056 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-18 14:59:25,057 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-18 14:59:25,058 INFO ]: Initializing Boogie Preprocessor... [2018-06-18 14:59:25,058 INFO ]: Boogie Preprocessor initialized [2018-06-18 14:59:25,083 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 02:59:25" (1/1) ... [2018-06-18 14:59:25,083 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 02:59:25" (1/1) ... [2018-06-18 14:59:25,094 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 02:59:25" (1/1) ... [2018-06-18 14:59:25,095 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 02:59:25" (1/1) ... [2018-06-18 14:59:25,111 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 02:59:25" (1/1) ... [2018-06-18 14:59:25,112 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 02:59:25" (1/1) ... [2018-06-18 14:59:25,114 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 02:59:25" (1/1) ... [2018-06-18 14:59:25,116 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-18 14:59:25,116 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-18 14:59:25,116 INFO ]: Initializing RCFGBuilder... [2018-06-18 14:59:25,116 INFO ]: RCFGBuilder initialized [2018-06-18 14:59:25,117 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 02:59:25" (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 [2018-06-18 14:59:25,142 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-18 14:59:25,142 INFO ]: Found specification of procedure False [2018-06-18 14:59:25,142 INFO ]: Found implementation of procedure False [2018-06-18 14:59:25,142 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-18 14:59:25,142 INFO ]: Found specification of procedure state [2018-06-18 14:59:25,143 INFO ]: Found implementation of procedure state [2018-06-18 14:59:25,143 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-18 14:59:25,143 INFO ]: Found specification of procedure Ultimate.START [2018-06-18 14:59:25,143 INFO ]: Found implementation of procedure Ultimate.START [2018-06-18 14:59:25,473 INFO ]: Using library mode [2018-06-18 14:59:25,474 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 02:59:25 BoogieIcfgContainer [2018-06-18 14:59:25,474 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-18 14:59:25,487 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-18 14:59:25,487 INFO ]: Initializing TraceAbstraction... [2018-06-18 14:59:25,499 INFO ]: TraceAbstraction initialized [2018-06-18 14:59:25,499 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 02:59:24" (1/3) ... [2018-06-18 14:59:25,500 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@707fe4da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 18.06 02:59:25, skipping insertion in model container [2018-06-18 14:59:25,501 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 02:59:25" (2/3) ... [2018-06-18 14:59:25,501 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@707fe4da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.06 02:59:25, skipping insertion in model container [2018-06-18 14:59:25,501 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 02:59:25" (3/3) ... [2018-06-18 14:59:25,509 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-18 14:59:25,530 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-18 14:59:25,555 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-18 14:59:25,606 INFO ]: Using default assertion order modulation [2018-06-18 14:59:25,607 INFO ]: Interprodecural is true [2018-06-18 14:59:25,607 INFO ]: Hoare is false [2018-06-18 14:59:25,607 INFO ]: Compute interpolants for FPandBP [2018-06-18 14:59:25,607 INFO ]: Backedges is TWOTRACK [2018-06-18 14:59:25,607 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-18 14:59:25,607 INFO ]: Difference is false [2018-06-18 14:59:25,607 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-18 14:59:25,607 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-18 14:59:25,626 INFO ]: Start isEmpty. Operand 13 states. [2018-06-18 14:59:25,647 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-18 14:59:25,647 INFO ]: Found error trace [2018-06-18 14:59:25,648 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 14:59:25,648 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 14:59:25,655 INFO ]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times [2018-06-18 14:59:25,658 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 14:59:25,658 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 14:59:25,703 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 14:59:25,703 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 14:59:25,703 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 14:59:25,768 INFO ]: Conjunction of SSA is unsat [2018-06-18 14:59:25,778 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 14:59:25,987 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-18 14:59:25,989 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-18 14:59:25,989 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-18 14:59:25,991 INFO ]: Interpolant automaton has 4 states [2018-06-18 14:59:26,003 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-18 14:59:26,004 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-18 14:59:26,007 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-18 14:59:26,134 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 14:59:26,134 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-18 14:59:26,135 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-18 14:59:26,136 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-18 14:59:26,136 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 14:59:26,150 INFO ]: With dead ends: 13 [2018-06-18 14:59:26,150 INFO ]: Without dead ends: 13 [2018-06-18 14:59:26,152 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-18 14:59:26,173 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-18 14:59:26,226 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-18 14:59:26,227 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-18 14:59:26,228 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-18 14:59:26,229 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-18 14:59:26,229 INFO ]: Finished accepts. word is rejected. [2018-06-18 14:59:26,229 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-18 14:59:26,229 INFO ]: Interpolant automaton has 4 states. [2018-06-18 14:59:26,229 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-18 14:59:26,232 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-18 14:59:26,232 INFO ]: Found error trace [2018-06-18 14:59:26,232 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 14:59:26,232 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 14:59:26,232 INFO ]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times [2018-06-18 14:59:26,232 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 14:59:26,232 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 14:59:26,233 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 14:59:26,234 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 14:59:26,234 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 14:59:26,412 INFO ]: Conjunction of SSA is unsat [2018-06-18 14:59:26,414 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 14:59:28,745 WARN ]: Spent 1.88 s on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2018-06-18 14:59:29,166 WARN ]: Spent 409.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 16 [2018-06-18 14:59:29,938 WARN ]: Spent 638.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 11 [2018-06-18 14:59:29,943 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 14:59:29,943 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 14:59:29,943 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 [2018-06-18 14:59:29,957 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 14:59:30,014 INFO ]: Conjunction of SSA is unsat [2018-06-18 14:59:30,025 INFO ]: Computing forward predicates... [2018-06-18 14:59:30,269 WARN ]: expecting exponential blowup for input size 6 [2018-06-18 14:59:30,286 WARN ]: expecting exponential blowup for input size 6 [2018-06-18 14:59:30,297 WARN ]: expecting exponential blowup for input size 6 [2018-06-18 14:59:30,311 WARN ]: expecting exponential blowup for input size 6 [2018-06-18 14:59:30,320 WARN ]: expecting exponential blowup for input size 6 [2018-06-18 14:59:30,327 WARN ]: expecting exponential blowup for input size 6 [2018-06-18 14:59:32,154 WARN ]: Spent 338.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 33 [2018-06-18 14:59:32,285 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 14:59:32,308 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 14:59:32,309 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-06-18 14:59:32,309 INFO ]: Interpolant automaton has 9 states [2018-06-18 14:59:32,309 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-18 14:59:32,310 INFO ]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2018-06-18 14:59:32,310 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 9 states. [2018-06-18 14:59:32,763 WARN ]: Spent 294.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2018-06-18 14:59:33,031 WARN ]: Spent 196.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 59 [2018-06-18 14:59:33,084 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 14:59:33,084 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-18 14:59:33,085 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-18 14:59:33,085 INFO ]: Start accepts. Automaton has 9 states. Word has length 13 [2018-06-18 14:59:33,085 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 14:59:33,086 INFO ]: With dead ends: 15 [2018-06-18 14:59:33,086 INFO ]: Without dead ends: 15 [2018-06-18 14:59:33,087 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2018-06-18 14:59:33,087 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-18 14:59:33,089 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-18 14:59:33,090 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-18 14:59:33,090 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-18 14:59:33,090 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-18 14:59:33,090 INFO ]: Finished accepts. word is rejected. [2018-06-18 14:59:33,090 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-18 14:59:33,090 INFO ]: Interpolant automaton has 9 states. [2018-06-18 14:59:33,090 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-18 14:59:33,091 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-18 14:59:33,091 INFO ]: Found error trace [2018-06-18 14:59:33,091 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 14:59:33,091 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 14:59:33,091 INFO ]: Analyzing trace with hash -1649658231, now seen corresponding path program 2 times [2018-06-18 14:59:33,091 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 14:59:33,091 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 14:59:33,092 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 14:59:33,092 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 14:59:33,092 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 14:59:33,187 INFO ]: Conjunction of SSA is unsat [2018-06-18 14:59:33,190 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 14:59:33,551 WARN ]: Spent 171.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2018-06-18 14:59:33,839 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-18 14:59:33,839 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 14:59:33,839 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) [2018-06-18 14:59:33,856 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-18 14:59:33,928 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-18 14:59:33,928 INFO ]: Conjunction of SSA is unsat [2018-06-18 14:59:33,935 INFO ]: Computing forward predicates... [2018-06-18 14:59:35,518 WARN ]: Spent 702.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 45 [2018-06-18 14:59:36,158 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-18 14:59:36,181 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 14:59:36,181 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2018-06-18 14:59:36,181 INFO ]: Interpolant automaton has 13 states [2018-06-18 14:59:36,181 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-18 14:59:36,181 INFO ]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-06-18 14:59:36,182 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 13 states. [2018-06-18 14:59:36,415 WARN ]: Spent 171.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2018-06-18 14:59:37,654 WARN ]: Spent 1.15 s on a formula simplification. DAG size of input: 119 DAG size of output: 103 [2018-06-18 14:59:37,970 WARN ]: Spent 219.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 67 [2018-06-18 14:59:37,997 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 14:59:37,998 INFO ]: Finished difference Result 11 states and 12 transitions. [2018-06-18 14:59:37,999 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-18 14:59:37,999 INFO ]: Start accepts. Automaton has 13 states. Word has length 17 [2018-06-18 14:59:37,999 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 14:59:37,999 INFO ]: With dead ends: 11 [2018-06-18 14:59:37,999 INFO ]: Without dead ends: 0 [2018-06-18 14:59:38,000 INFO ]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2018-06-18 14:59:38,000 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-18 14:59:38,000 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-18 14:59:38,000 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-18 14:59:38,000 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-18 14:59:38,000 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2018-06-18 14:59:38,000 INFO ]: Finished accepts. word is rejected. [2018-06-18 14:59:38,000 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-18 14:59:38,000 INFO ]: Interpolant automaton has 13 states. [2018-06-18 14:59:38,000 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-18 14:59:38,000 INFO ]: Finished isEmpty. No accepting run. [2018-06-18 14:59:38,005 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.06 02:59:38 BoogieIcfgContainer [2018-06-18 14:59:38,005 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-18 14:59:38,006 INFO ]: Toolchain (without parser) took 13052.57 ms. Allocated memory was 307.8 MB in the beginning and 430.4 MB in the end (delta: 122.7 MB). Free memory was 260.1 MB in the beginning and 190.9 MB in the end (delta: 69.2 MB). Peak memory consumption was 191.9 MB. Max. memory is 3.6 GB. [2018-06-18 14:59:38,006 INFO ]: SmtParser took 0.09 ms. Allocated memory is still 307.8 MB. Free memory is still 273.2 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-18 14:59:38,007 INFO ]: ChcToBoogie took 87.85 ms. Allocated memory is still 307.8 MB. Free memory was 260.1 MB in the beginning and 257.2 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. [2018-06-18 14:59:38,007 INFO ]: Boogie Preprocessor took 58.25 ms. Allocated memory is still 307.8 MB. Free memory was 257.2 MB in the beginning and 256.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 3.6 GB. [2018-06-18 14:59:38,008 INFO ]: RCFGBuilder took 358.02 ms. Allocated memory is still 307.8 MB. Free memory was 256.1 MB in the beginning and 244.0 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 3.6 GB. [2018-06-18 14:59:38,008 INFO ]: TraceAbstraction took 12517.49 ms. Allocated memory was 307.8 MB in the beginning and 430.4 MB in the end (delta: 122.7 MB). Free memory was 244.0 MB in the beginning and 190.9 MB in the end (delta: 53.1 MB). Peak memory consumption was 175.8 MB. Max. memory is 3.6 GB. [2018-06-18 14:59:38,012 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.09 ms. Allocated memory is still 307.8 MB. Free memory is still 273.2 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 87.85 ms. Allocated memory is still 307.8 MB. Free memory was 260.1 MB in the beginning and 257.2 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 58.25 ms. Allocated memory is still 307.8 MB. Free memory was 257.2 MB in the beginning and 256.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 3.6 GB. * RCFGBuilder took 358.02 ms. Allocated memory is still 307.8 MB. Free memory was 256.1 MB in the beginning and 244.0 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 3.6 GB. * TraceAbstraction took 12517.49 ms. Allocated memory was 307.8 MB in the beginning and 430.4 MB in the end (delta: 122.7 MB). Free memory was 244.0 MB in the beginning and 190.9 MB in the end (delta: 53.1 MB). Peak memory consumption was 175.8 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 3 procedures, 13 locations, 1 error locations. SAFE Result, 12.4s OverallTime, 3 OverallIterations, 3 TraceHistogramMax, 2.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 30 SDtfs, 10 SDslu, 92 SDs, 0 SdLazy, 81 SolverSat, 22 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 7.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred in iteration=2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 8.8s InterpolantComputationTime, 69 NumberOfCodeBlocks, 69 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 64 ConstructedInterpolants, 0 QuantifiedInterpolants, 15224 SizeOfPredicates, 78 NumberOfNonLiveVariables, 393 ConjunctsInSsa, 133 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 8/26 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_e8_381_e8_477.smt2_chcToBoogie_automizer.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-18_14-59-38-024.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ex3_e8_381_e8_477.smt2_chcToBoogie_automizer.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-18_14-59-38-024.csv Received shutdown request...