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/durationThm_3_e2_63_e7_21.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 17:23:52,262 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 17:23:52,266 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 17:23:52,278 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 17:23:52,278 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 17:23:52,279 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 17:23:52,283 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 17:23:52,289 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 17:23:52,291 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 17:23:52,293 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 17:23:52,294 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 17:23:52,294 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 17:23:52,295 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 17:23:52,296 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 17:23:52,300 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 17:23:52,301 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 17:23:52,302 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 17:23:52,312 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 17:23:52,313 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 17:23:52,314 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 17:23:52,315 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 17:23:52,320 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 17:23:52,321 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 17:23:52,321 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 17:23:52,322 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 17:23:52,323 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 17:23:52,323 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 17:23:52,326 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 17:23:52,327 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 17:23:52,327 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 17:23:52,328 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 17:23:52,328 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 17:23:52,329 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 17:23:52,333 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 17:23:52,334 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 17:23:52,334 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 17:23:52,354 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 17:23:52,354 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 17:23:52,355 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 17:23:52,355 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 17:23:52,356 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 17:23:52,356 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 17:23:52,356 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 17:23:52,356 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 17:23:52,357 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 17:23:52,357 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 17:23:52,357 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 17:23:52,357 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 17:23:52,357 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 17:23:52,357 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 17:23:52,358 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 17:23:52,358 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 17:23:52,359 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 17:23:52,359 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 17:23:52,359 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 17:23:52,360 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 17:23:52,360 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 17:23:52,411 INFO ]: Repository-Root is: /tmp [2018-06-22 17:23:52,426 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 17:23:52,429 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 17:23:52,431 INFO ]: Initializing SmtParser... [2018-06-22 17:23:52,431 INFO ]: SmtParser initialized [2018-06-22 17:23:52,432 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/durationThm_3_e2_63_e7_21.smt2 [2018-06-22 17:23:52,433 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 17:23:52,533 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/durationThm_3_e2_63_e7_21.smt2 unknown [2018-06-22 17:23:52,772 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/durationThm_3_e2_63_e7_21.smt2 [2018-06-22 17:23:52,779 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 17:23:52,784 INFO ]: Walking toolchain with 4 elements. [2018-06-22 17:23:52,785 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 17:23:52,785 INFO ]: Initializing ChcToBoogie... [2018-06-22 17:23:52,785 INFO ]: ChcToBoogie initialized [2018-06-22 17:23:52,789 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:23:52" (1/1) ... [2018-06-22 17:23:52,837 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:23:52 Unit [2018-06-22 17:23:52,838 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 17:23:52,838 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 17:23:52,838 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 17:23:52,838 INFO ]: Boogie Preprocessor initialized [2018-06-22 17:23:52,863 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:23:52" (1/1) ... [2018-06-22 17:23:52,863 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:23:52" (1/1) ... [2018-06-22 17:23:52,872 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:23:52" (1/1) ... [2018-06-22 17:23:52,872 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:23:52" (1/1) ... [2018-06-22 17:23:52,876 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:23:52" (1/1) ... [2018-06-22 17:23:52,877 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:23:52" (1/1) ... [2018-06-22 17:23:52,878 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:23:52" (1/1) ... [2018-06-22 17:23:52,889 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 17:23:52,890 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 17:23:52,890 INFO ]: Initializing RCFGBuilder... [2018-06-22 17:23:52,890 INFO ]: RCFGBuilder initialized [2018-06-22 17:23:52,891 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:23:52" (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 17:23:52,911 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 17:23:52,911 INFO ]: Found specification of procedure False [2018-06-22 17:23:52,911 INFO ]: Found implementation of procedure False [2018-06-22 17:23:52,911 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 17:23:52,911 INFO ]: Found specification of procedure state [2018-06-22 17:23:52,911 INFO ]: Found implementation of procedure state [2018-06-22 17:23:52,911 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 17:23:52,911 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 17:23:52,911 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 17:23:53,214 INFO ]: Using library mode [2018-06-22 17:23:53,215 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:23:53 BoogieIcfgContainer [2018-06-22 17:23:53,215 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 17:23:53,216 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 17:23:53,217 INFO ]: Initializing TraceAbstraction... [2018-06-22 17:23:53,220 INFO ]: TraceAbstraction initialized [2018-06-22 17:23:53,220 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:23:52" (1/3) ... [2018-06-22 17:23:53,221 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46cc1ad0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 05:23:53, skipping insertion in model container [2018-06-22 17:23:53,221 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:23:52" (2/3) ... [2018-06-22 17:23:53,221 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46cc1ad0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 05:23:53, skipping insertion in model container [2018-06-22 17:23:53,221 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:23:53" (3/3) ... [2018-06-22 17:23:53,223 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 17:23:53,239 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 17:23:53,250 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 17:23:53,287 INFO ]: Using default assertion order modulation [2018-06-22 17:23:53,287 INFO ]: Interprodecural is true [2018-06-22 17:23:53,287 INFO ]: Hoare is false [2018-06-22 17:23:53,287 INFO ]: Compute interpolants for FPandBP [2018-06-22 17:23:53,287 INFO ]: Backedges is TWOTRACK [2018-06-22 17:23:53,287 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 17:23:53,287 INFO ]: Difference is false [2018-06-22 17:23:53,287 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 17:23:53,287 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 17:23:53,301 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 17:23:53,316 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 17:23:53,316 INFO ]: Found error trace [2018-06-22 17:23:53,317 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 17:23:53,317 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 17:23:53,323 INFO ]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times [2018-06-22 17:23:53,325 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 17:23:53,325 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 17:23:53,363 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 17:23:53,363 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 17:23:53,363 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 17:23:53,417 INFO ]: Conjunction of SSA is unsat [2018-06-22 17:23:53,567 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 17:23:53,569 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 17:23:53,569 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 17:23:53,570 INFO ]: Interpolant automaton has 4 states [2018-06-22 17:23:53,581 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 17:23:53,581 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 17:23:53,583 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 17:23:53,666 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 17:23:53,666 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 17:23:53,667 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 17:23:53,668 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 17:23:53,668 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 17:23:53,677 INFO ]: With dead ends: 13 [2018-06-22 17:23:53,677 INFO ]: Without dead ends: 13 [2018-06-22 17:23:53,678 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 [2018-06-22 17:23:53,691 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 17:23:53,711 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 17:23:53,712 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 17:23:53,712 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 17:23:53,714 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 17:23:53,714 INFO ]: Finished accepts. word is rejected. [2018-06-22 17:23:53,714 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 17:23:53,714 INFO ]: Interpolant automaton has 4 states. [2018-06-22 17:23:53,714 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 17:23:53,715 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 17:23:53,715 INFO ]: Found error trace [2018-06-22 17:23:53,715 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 17:23:53,715 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 17:23:53,716 INFO ]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times [2018-06-22 17:23:53,716 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 17:23:53,716 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 17:23:53,717 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 17:23:53,717 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 17:23:53,718 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 17:23:53,792 INFO ]: Conjunction of SSA is unsat [2018-06-22 17:23:54,502 WARN ]: Spent 436.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2018-06-22 17:23:54,834 WARN ]: Spent 274.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2018-06-22 17:23:54,844 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 17:23:54,844 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 17:23:54,844 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 17:23:54,853 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 17:23:54,907 INFO ]: Conjunction of SSA is unsat [2018-06-22 17:23:54,917 INFO ]: Computing forward predicates... [2018-06-22 17:23:56,002 WARN ]: Spent 125.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 26 [2018-06-22 17:23:56,409 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 17:23:56,431 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 17:23:56,431 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-06-22 17:23:56,432 INFO ]: Interpolant automaton has 8 states [2018-06-22 17:23:56,432 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 17:23:56,432 INFO ]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-06-22 17:23:56,432 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2018-06-22 17:23:56,610 WARN ]: Spent 121.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2018-06-22 17:23:56,839 WARN ]: Spent 171.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2018-06-22 17:23:57,042 WARN ]: Spent 176.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 28 [2018-06-22 17:23:57,072 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 17:23:57,072 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 17:23:57,075 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 17:23:57,075 INFO ]: Start accepts. Automaton has 8 states. Word has length 13 [2018-06-22 17:23:57,075 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 17:23:57,075 INFO ]: With dead ends: 15 [2018-06-22 17:23:57,075 INFO ]: Without dead ends: 15 [2018-06-22 17:23:57,076 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-06-22 17:23:57,076 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 17:23:57,079 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 17:23:57,080 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 17:23:57,080 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 17:23:57,080 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 17:23:57,080 INFO ]: Finished accepts. word is rejected. [2018-06-22 17:23:57,080 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 17:23:57,080 INFO ]: Interpolant automaton has 8 states. [2018-06-22 17:23:57,080 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 17:23:57,081 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 17:23:57,081 INFO ]: Found error trace [2018-06-22 17:23:57,081 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 17:23:57,081 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 17:23:57,081 INFO ]: Analyzing trace with hash -1649658231, now seen corresponding path program 2 times [2018-06-22 17:23:57,081 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 17:23:57,081 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 17:23:57,082 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 17:23:57,082 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 17:23:57,082 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 17:23:57,127 INFO ]: Conjunction of SSA is unsat [2018-06-22 17:23:57,483 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 17:23:57,483 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 17:23:57,483 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 17:23:57,496 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 17:23:57,535 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 17:23:57,535 INFO ]: Conjunction of SSA is unsat [2018-06-22 17:23:57,539 INFO ]: Computing forward predicates... [2018-06-22 17:23:58,070 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 17:23:58,091 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 17:23:58,091 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2018-06-22 17:23:58,091 INFO ]: Interpolant automaton has 12 states [2018-06-22 17:23:58,092 INFO ]: Constructing interpolant automaton starting with 12 interpolants. [2018-06-22 17:23:58,092 INFO ]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2018-06-22 17:23:58,092 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 12 states. [2018-06-22 17:23:58,487 WARN ]: Spent 266.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 72 [2018-06-22 17:23:58,799 WARN ]: Spent 225.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 55 [2018-06-22 17:23:59,007 WARN ]: Spent 145.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 52 [2018-06-22 17:23:59,041 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 17:23:59,041 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 17:23:59,044 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 17:23:59,044 INFO ]: Start accepts. Automaton has 12 states. Word has length 17 [2018-06-22 17:23:59,044 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 17:23:59,045 INFO ]: With dead ends: 17 [2018-06-22 17:23:59,045 INFO ]: Without dead ends: 17 [2018-06-22 17:23:59,045 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2018-06-22 17:23:59,045 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 17:23:59,048 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 17:23:59,048 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 17:23:59,048 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 17:23:59,048 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 17:23:59,049 INFO ]: Finished accepts. word is rejected. [2018-06-22 17:23:59,049 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 17:23:59,049 INFO ]: Interpolant automaton has 12 states. [2018-06-22 17:23:59,049 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 17:23:59,049 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 17:23:59,049 INFO ]: Found error trace [2018-06-22 17:23:59,049 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 17:23:59,049 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 17:23:59,050 INFO ]: Analyzing trace with hash 2119922091, now seen corresponding path program 3 times [2018-06-22 17:23:59,050 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 17:23:59,050 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 17:23:59,050 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 17:23:59,050 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 17:23:59,050 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 17:23:59,084 INFO ]: Conjunction of SSA is unsat [2018-06-22 17:23:59,506 WARN ]: Spent 101.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2018-06-22 17:23:59,935 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 17:23:59,935 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 17:23:59,935 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 17:23:59,941 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 17:24:00,006 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 17:24:00,006 INFO ]: Conjunction of SSA is unsat [2018-06-22 17:24:00,011 INFO ]: Computing forward predicates... [2018-06-22 17:24:00,652 WARN ]: Spent 209.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 37 [2018-06-22 17:24:01,019 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 17:24:01,052 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 17:24:01,052 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2018-06-22 17:24:01,053 INFO ]: Interpolant automaton has 16 states [2018-06-22 17:24:01,053 INFO ]: Constructing interpolant automaton starting with 16 interpolants. [2018-06-22 17:24:01,053 INFO ]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2018-06-22 17:24:01,054 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 16 states. [2018-06-22 17:24:01,334 WARN ]: Spent 236.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 50 [2018-06-22 17:24:01,826 WARN ]: Spent 456.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 91 [2018-06-22 17:24:02,546 WARN ]: Spent 675.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 62 [2018-06-22 17:24:02,582 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 17:24:02,582 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 17:24:02,582 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 17:24:02,582 INFO ]: Start accepts. Automaton has 16 states. Word has length 21 [2018-06-22 17:24:02,582 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 17:24:02,582 INFO ]: With dead ends: 13 [2018-06-22 17:24:02,582 INFO ]: Without dead ends: 0 [2018-06-22 17:24:02,583 INFO ]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2018-06-22 17:24:02,583 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-22 17:24:02,583 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-22 17:24:02,583 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-22 17:24:02,583 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-22 17:24:02,583 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2018-06-22 17:24:02,583 INFO ]: Finished accepts. word is rejected. [2018-06-22 17:24:02,583 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-22 17:24:02,583 INFO ]: Interpolant automaton has 16 states. [2018-06-22 17:24:02,583 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-22 17:24:02,583 INFO ]: Finished isEmpty. No accepting run. [2018-06-22 17:24:02,587 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 05:24:02 BoogieIcfgContainer [2018-06-22 17:24:02,587 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 17:24:02,588 INFO ]: Toolchain (without parser) took 9808.08 ms. Allocated memory was 309.3 MB in the beginning and 416.3 MB in the end (delta: 107.0 MB). Free memory was 262.7 MB in the beginning and 191.2 MB in the end (delta: 71.5 MB). Peak memory consumption was 178.5 MB. Max. memory is 3.6 GB. [2018-06-22 17:24:02,588 INFO ]: SmtParser took 0.08 ms. Allocated memory is still 309.3 MB. Free memory is still 274.8 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 17:24:02,589 INFO ]: ChcToBoogie took 52.66 ms. Allocated memory is still 309.3 MB. Free memory was 261.7 MB in the beginning and 260.7 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. [2018-06-22 17:24:02,589 INFO ]: Boogie Preprocessor took 50.77 ms. Allocated memory is still 309.3 MB. Free memory was 260.7 MB in the beginning and 258.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 17:24:02,590 INFO ]: RCFGBuilder took 325.47 ms. Allocated memory is still 309.3 MB. Free memory was 258.7 MB in the beginning and 248.7 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 3.6 GB. [2018-06-22 17:24:02,590 INFO ]: TraceAbstraction took 9370.33 ms. Allocated memory was 309.3 MB in the beginning and 416.3 MB in the end (delta: 107.0 MB). Free memory was 248.7 MB in the beginning and 191.2 MB in the end (delta: 57.5 MB). Peak memory consumption was 164.4 MB. Max. memory is 3.6 GB. [2018-06-22 17:24:02,593 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.08 ms. Allocated memory is still 309.3 MB. Free memory is still 274.8 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 52.66 ms. Allocated memory is still 309.3 MB. Free memory was 261.7 MB in the beginning and 260.7 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. * Boogie Preprocessor took 50.77 ms. Allocated memory is still 309.3 MB. Free memory was 260.7 MB in the beginning and 258.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 325.47 ms. Allocated memory is still 309.3 MB. Free memory was 258.7 MB in the beginning and 248.7 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 9370.33 ms. Allocated memory was 309.3 MB in the beginning and 416.3 MB in the end (delta: 107.0 MB). Free memory was 248.7 MB in the beginning and 191.2 MB in the end (delta: 57.5 MB). Peak memory consumption was 164.4 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, 9.3s OverallTime, 4 OverallIterations, 4 TraceHistogramMax, 3.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 41 SDtfs, 25 SDslu, 155 SDs, 0 SdLazy, 134 SolverSat, 45 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 86 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 5.8s 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: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 5.4s InterpolantComputationTime, 111 NumberOfCodeBlocks, 111 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 104 ConstructedInterpolants, 0 QuantifiedInterpolants, 31168 SizeOfPredicates, 123 NumberOfNonLiveVariables, 717 ConjunctsInSsa, 179 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/durationThm_3_e2_63_e7_21.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_17-24-02-604.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/durationThm_3_e2_63_e7_21.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_17-24-02-604.csv Received shutdown request...