java -Xss1g -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_No_Goto.epf -i /storage/chc-comp/vmt-chc-benchmarks/lustre/ticket3i_5_e7_3307.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 20:35:24,989 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 20:35:24,992 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 20:35:25,007 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 20:35:25,008 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 20:35:25,009 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 20:35:25,011 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 20:35:25,015 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 20:35:25,016 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 20:35:25,018 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 20:35:25,019 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 20:35:25,019 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 20:35:25,020 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 20:35:25,024 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 20:35:25,025 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 20:35:25,025 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 20:35:25,027 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 20:35:25,041 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 20:35:25,042 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 20:35:25,043 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 20:35:25,047 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 20:35:25,050 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 20:35:25,050 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 20:35:25,050 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 20:35:25,051 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 20:35:25,052 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 20:35:25,052 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 20:35:25,053 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 20:35:25,056 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 20:35:25,057 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 20:35:25,057 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 20:35:25,058 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 20:35:25,058 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 20:35:25,059 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 20:35:25,059 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 20:35:25,062 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_No_Goto.epf [2018-06-22 20:35:25,080 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 20:35:25,080 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 20:35:25,080 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 20:35:25,081 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 20:35:25,082 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 20:35:25,082 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 20:35:25,082 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 20:35:25,083 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 20:35:25,083 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 20:35:25,083 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 20:35:25,083 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 20:35:25,083 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 20:35:25,084 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 20:35:25,084 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 20:35:25,084 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 20:35:25,084 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 20:35:25,084 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 20:35:25,085 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 20:35:25,085 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 20:35:25,087 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 20:35:25,087 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 20:35:25,144 INFO ]: Repository-Root is: /tmp [2018-06-22 20:35:25,160 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 20:35:25,166 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 20:35:25,168 INFO ]: Initializing SmtParser... [2018-06-22 20:35:25,168 INFO ]: SmtParser initialized [2018-06-22 20:35:25,168 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/ticket3i_5_e7_3307.smt2 [2018-06-22 20:35:25,170 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 [2018-06-22 20:35:25,257 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/ticket3i_5_e7_3307.smt2 unknown [2018-06-22 20:35:25,949 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/ticket3i_5_e7_3307.smt2 [2018-06-22 20:35:25,953 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 20:35:25,961 INFO ]: Walking toolchain with 4 elements. [2018-06-22 20:35:25,962 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 20:35:25,962 INFO ]: Initializing ChcToBoogie... [2018-06-22 20:35:25,962 INFO ]: ChcToBoogie initialized [2018-06-22 20:35:25,965 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 08:35:25" (1/1) ... [2018-06-22 20:35:26,022 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 08:35:26 Unit [2018-06-22 20:35:26,022 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 20:35:26,023 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 20:35:26,023 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 20:35:26,023 INFO ]: Boogie Preprocessor initialized [2018-06-22 20:35:26,043 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 08:35:26" (1/1) ... [2018-06-22 20:35:26,043 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 08:35:26" (1/1) ... [2018-06-22 20:35:26,056 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 08:35:26" (1/1) ... [2018-06-22 20:35:26,057 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 08:35:26" (1/1) ... [2018-06-22 20:35:26,065 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 08:35:26" (1/1) ... [2018-06-22 20:35:26,067 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 08:35:26" (1/1) ... [2018-06-22 20:35:26,070 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 08:35:26" (1/1) ... [2018-06-22 20:35:26,075 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 20:35:26,076 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 20:35:26,076 INFO ]: Initializing RCFGBuilder... [2018-06-22 20:35:26,076 INFO ]: RCFGBuilder initialized [2018-06-22 20:35:26,076 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 08:35:26" (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) [2018-06-22 20:35:26,091 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 20:35:26,091 INFO ]: Found specification of procedure False [2018-06-22 20:35:26,091 INFO ]: Found implementation of procedure False [2018-06-22 20:35:26,091 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 20:35:26,091 INFO ]: Found specification of procedure state [2018-06-22 20:35:26,091 INFO ]: Found implementation of procedure state [2018-06-22 20:35:26,091 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 20:35:26,091 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 20:35:26,091 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 [2018-06-22 20:35:26,520 INFO ]: Using library mode [2018-06-22 20:35:26,521 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 08:35:26 BoogieIcfgContainer [2018-06-22 20:35:26,521 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 20:35:26,523 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 20:35:26,523 INFO ]: Initializing TraceAbstraction... [2018-06-22 20:35:26,526 INFO ]: TraceAbstraction initialized [2018-06-22 20:35:26,526 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 08:35:25" (1/3) ... [2018-06-22 20:35:26,529 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29a7db8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 08:35:26, skipping insertion in model container [2018-06-22 20:35:26,529 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 08:35:26" (2/3) ... [2018-06-22 20:35:26,529 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29a7db8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 08:35:26, skipping insertion in model container [2018-06-22 20:35:26,529 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 08:35:26" (3/3) ... [2018-06-22 20:35:26,531 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 20:35:26,541 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 20:35:26,551 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 20:35:26,597 INFO ]: Using default assertion order modulation [2018-06-22 20:35:26,598 INFO ]: Interprodecural is true [2018-06-22 20:35:26,598 INFO ]: Hoare is false [2018-06-22 20:35:26,598 INFO ]: Compute interpolants for FPandBP [2018-06-22 20:35:26,598 INFO ]: Backedges is TWOTRACK [2018-06-22 20:35:26,598 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 20:35:26,598 INFO ]: Difference is false [2018-06-22 20:35:26,598 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 20:35:26,598 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 20:35:26,610 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 20:35:26,623 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 20:35:26,623 INFO ]: Found error trace [2018-06-22 20:35:26,624 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 20:35:26,624 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 20:35:26,630 INFO ]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times [2018-06-22 20:35:26,632 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 20:35:26,632 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 20:35:26,668 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 20:35:26,668 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 20:35:26,668 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 20:35:26,811 INFO ]: Conjunction of SSA is unsat [2018-06-22 20:35:27,250 WARN ]: Spent 191.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 5 [2018-06-22 20:35:27,252 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 20:35:27,254 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 20:35:27,254 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 20:35:27,255 INFO ]: Interpolant automaton has 4 states [2018-06-22 20:35:27,265 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 20:35:27,265 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 20:35:27,267 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 20:35:27,372 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 20:35:27,372 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 20:35:27,372 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 20:35:27,373 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 20:35:27,374 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 20:35:27,385 INFO ]: With dead ends: 13 [2018-06-22 20:35:27,385 INFO ]: Without dead ends: 13 [2018-06-22 20:35:27,386 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 20:35:27,403 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 20:35:27,435 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 20:35:27,436 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 20:35:27,436 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 20:35:27,437 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 20:35:27,437 INFO ]: Finished accepts. word is rejected. [2018-06-22 20:35:27,437 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 20:35:27,438 INFO ]: Interpolant automaton has 4 states. [2018-06-22 20:35:27,438 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 20:35:27,439 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 20:35:27,439 INFO ]: Found error trace [2018-06-22 20:35:27,439 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 20:35:27,439 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 20:35:27,439 INFO ]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times [2018-06-22 20:35:27,439 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 20:35:27,439 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 20:35:27,440 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 20:35:27,440 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 20:35:27,440 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 20:35:27,527 INFO ]: Conjunction of SSA is unsat [2018-06-22 20:35:28,242 WARN ]: Spent 549.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 28 [2018-06-22 20:35:28,410 WARN ]: Spent 105.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 6 [2018-06-22 20:35:28,426 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 20:35:28,445 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 20:35:28,446 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 [2018-06-22 20:35:28,453 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 20:35:28,596 INFO ]: Conjunction of SSA is unsat [2018-06-22 20:35:28,610 INFO ]: Computing forward predicates... [2018-06-22 20:35:29,121 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 20:35:29,178 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 20:35:32,344 WARN ]: Spent 684.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 16 [2018-06-22 20:35:32,658 WARN ]: Spent 179.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 6 [2018-06-22 20:35:32,687 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 20:35:32,721 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 20:35:32,721 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-06-22 20:35:32,722 INFO ]: Interpolant automaton has 8 states [2018-06-22 20:35:32,722 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 20:35:32,722 INFO ]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2018-06-22 20:35:32,722 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2018-06-22 20:35:33,084 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 20:35:33,084 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 20:35:33,085 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 20:35:33,085 INFO ]: Start accepts. Automaton has 8 states. Word has length 13 [2018-06-22 20:35:33,085 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 20:35:33,086 INFO ]: With dead ends: 15 [2018-06-22 20:35:33,086 INFO ]: Without dead ends: 15 [2018-06-22 20:35:33,087 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2018-06-22 20:35:33,087 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 20:35:33,091 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 20:35:33,091 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 20:35:33,091 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 20:35:33,091 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 20:35:33,091 INFO ]: Finished accepts. word is rejected. [2018-06-22 20:35:33,091 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 20:35:33,091 INFO ]: Interpolant automaton has 8 states. [2018-06-22 20:35:33,091 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 20:35:33,092 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 20:35:33,092 INFO ]: Found error trace [2018-06-22 20:35:33,092 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 20:35:33,092 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 20:35:33,092 INFO ]: Analyzing trace with hash -1649658231, now seen corresponding path program 2 times [2018-06-22 20:35:33,092 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 20:35:33,092 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 20:35:33,093 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 20:35:33,093 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 20:35:33,093 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 20:35:33,289 INFO ]: Conjunction of SSA is unsat [2018-06-22 20:35:33,665 WARN ]: Spent 166.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 53 [2018-06-22 20:35:33,794 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 20:35:33,794 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 20:35:33,794 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 [2018-06-22 20:35:33,809 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 20:35:33,968 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 20:35:33,968 INFO ]: Conjunction of SSA is unsat [2018-06-22 20:35:33,975 INFO ]: Computing forward predicates... [2018-06-22 20:35:34,371 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 20:35:34,434 WARN ]: expecting exponential blowup for input size 10 [2018-06-22 20:35:34,549 WARN ]: expecting exponential blowup for input size 10 [2018-06-22 20:35:40,932 WARN ]: Spent 697.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 21 [2018-06-22 20:35:41,759 WARN ]: Spent 439.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 41 [2018-06-22 20:35:41,914 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 20:35:41,935 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 20:35:41,936 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2018-06-22 20:35:41,936 INFO ]: Interpolant automaton has 12 states [2018-06-22 20:35:41,936 INFO ]: Constructing interpolant automaton starting with 12 interpolants. [2018-06-22 20:35:41,936 INFO ]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-06-22 20:35:41,936 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 12 states. [2018-06-22 20:35:42,630 WARN ]: Spent 596.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 121 [2018-06-22 20:35:42,842 WARN ]: Spent 172.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 65 [2018-06-22 20:35:43,166 WARN ]: Spent 292.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 81 [2018-06-22 20:35:43,215 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 20:35:43,215 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 20:35:43,217 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 20:35:43,218 INFO ]: Start accepts. Automaton has 12 states. Word has length 17 [2018-06-22 20:35:43,218 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 20:35:43,218 INFO ]: With dead ends: 17 [2018-06-22 20:35:43,218 INFO ]: Without dead ends: 17 [2018-06-22 20:35:43,219 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2018-06-22 20:35:43,219 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 20:35:43,221 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 20:35:43,222 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 20:35:43,222 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 20:35:43,222 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 20:35:43,222 INFO ]: Finished accepts. word is rejected. [2018-06-22 20:35:43,222 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 20:35:43,222 INFO ]: Interpolant automaton has 12 states. [2018-06-22 20:35:43,222 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 20:35:43,223 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 20:35:43,223 INFO ]: Found error trace [2018-06-22 20:35:43,223 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 20:35:43,223 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 20:35:43,223 INFO ]: Analyzing trace with hash 2119922091, now seen corresponding path program 3 times [2018-06-22 20:35:43,223 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 20:35:43,223 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 20:35:43,224 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 20:35:43,224 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 20:35:43,224 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 20:35:43,323 INFO ]: Conjunction of SSA is unsat [2018-06-22 20:35:44,110 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 20:35:44,110 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 20:35:44,134 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 [2018-06-22 20:35:44,141 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 20:35:44,352 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 20:35:44,352 INFO ]: Conjunction of SSA is unsat [2018-06-22 20:35:44,360 INFO ]: Computing forward predicates... [2018-06-22 20:35:44,725 WARN ]: expecting exponential blowup for input size 11 [2018-06-22 20:35:44,792 WARN ]: expecting exponential blowup for input size 11 [2018-06-22 20:35:46,745 WARN ]: Spent 112.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 7 [2018-06-22 20:35:46,797 WARN ]: expecting exponential blowup for input size 9 [2018-06-22 20:35:46,810 WARN ]: expecting exponential blowup for input size 8 [2018-06-22 20:35:48,025 WARN ]: Spent 206.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 16 [2018-06-22 20:35:48,379 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 20:35:48,401 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 20:35:48,401 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2018-06-22 20:35:48,401 INFO ]: Interpolant automaton has 16 states [2018-06-22 20:35:48,401 INFO ]: Constructing interpolant automaton starting with 16 interpolants. [2018-06-22 20:35:48,401 INFO ]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2018-06-22 20:35:48,401 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 16 states. [2018-06-22 20:35:48,622 WARN ]: Spent 164.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 83 [2018-06-22 20:35:48,831 WARN ]: Spent 167.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 55 [2018-06-22 20:35:49,016 WARN ]: Spent 160.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2018-06-22 20:35:49,251 WARN ]: Spent 201.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 70 [2018-06-22 20:35:49,262 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 20:35:49,262 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 20:35:49,262 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 20:35:49,262 INFO ]: Start accepts. Automaton has 16 states. Word has length 21 [2018-06-22 20:35:49,263 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 20:35:49,263 INFO ]: With dead ends: 13 [2018-06-22 20:35:49,263 INFO ]: Without dead ends: 0 [2018-06-22 20:35:49,263 INFO ]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2018-06-22 20:35:49,263 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-22 20:35:49,263 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-22 20:35:49,263 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-22 20:35:49,263 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-22 20:35:49,263 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2018-06-22 20:35:49,263 INFO ]: Finished accepts. word is rejected. [2018-06-22 20:35:49,263 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-22 20:35:49,263 INFO ]: Interpolant automaton has 16 states. [2018-06-22 20:35:49,263 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-22 20:35:49,263 INFO ]: Finished isEmpty. No accepting run. [2018-06-22 20:35:49,267 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 08:35:49 BoogieIcfgContainer [2018-06-22 20:35:49,267 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 20:35:49,268 INFO ]: Toolchain (without parser) took 23314.13 ms. Allocated memory was 305.1 MB in the beginning and 1.2 GB in the end (delta: 891.3 MB). Free memory was 237.6 MB in the beginning and 758.0 MB in the end (delta: -520.4 MB). Peak memory consumption was 370.9 MB. Max. memory is 3.6 GB. [2018-06-22 20:35:49,268 INFO ]: SmtParser took 0.06 ms. Allocated memory is still 305.1 MB. Free memory is still 269.6 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 20:35:49,269 INFO ]: ChcToBoogie took 61.01 ms. Allocated memory is still 305.1 MB. Free memory was 237.6 MB in the beginning and 233.6 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 3.6 GB. [2018-06-22 20:35:49,269 INFO ]: Boogie Preprocessor took 52.00 ms. Allocated memory is still 305.1 MB. Free memory was 233.6 MB in the beginning and 231.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 20:35:49,269 INFO ]: RCFGBuilder took 445.34 ms. Allocated memory is still 305.1 MB. Free memory was 231.6 MB in the beginning and 199.7 MB in the end (delta: 31.9 MB). Peak memory consumption was 31.9 MB. Max. memory is 3.6 GB. [2018-06-22 20:35:49,270 INFO ]: TraceAbstraction took 22744.13 ms. Allocated memory was 305.1 MB in the beginning and 1.2 GB in the end (delta: 891.3 MB). Free memory was 199.7 MB in the beginning and 758.0 MB in the end (delta: -558.3 MB). Peak memory consumption was 333.0 MB. Max. memory is 3.6 GB. [2018-06-22 20:35:49,272 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.06 ms. Allocated memory is still 305.1 MB. Free memory is still 269.6 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 61.01 ms. Allocated memory is still 305.1 MB. Free memory was 237.6 MB in the beginning and 233.6 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 52.00 ms. Allocated memory is still 305.1 MB. Free memory was 233.6 MB in the beginning and 231.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 445.34 ms. Allocated memory is still 305.1 MB. Free memory was 231.6 MB in the beginning and 199.7 MB in the end (delta: 31.9 MB). Peak memory consumption was 31.9 MB. Max. memory is 3.6 GB. * TraceAbstraction took 22744.13 ms. Allocated memory was 305.1 MB in the beginning and 1.2 GB in the end (delta: 891.3 MB). Free memory was 199.7 MB in the beginning and 758.0 MB in the end (delta: -558.3 MB). Peak memory consumption was 333.0 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, 22.6s OverallTime, 4 OverallIterations, 4 TraceHistogramMax, 2.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 41 SDtfs, 37 SDslu, 147 SDs, 0 SdLazy, 128 SolverSat, 54 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 88 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 7.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred 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: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 18.6s InterpolantComputationTime, 111 NumberOfCodeBlocks, 111 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 104 ConstructedInterpolants, 0 QuantifiedInterpolants, 16860 SizeOfPredicates, 125 NumberOfNonLiveVariables, 2919 ConjunctsInSsa, 167 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 20/68 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/ticket3i_5_e7_3307.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_20-35-49-280.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ticket3i_5_e7_3307.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_20-35-49-280.csv Received shutdown request...