java -Xss4m -Xmx4000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCHC.xml --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf -i /storage/chc-comp/vmt-chc-benchmarks/ctigar/sendmail-close-angle.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-14921ce [2018-06-25 13:27:22,206 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-25 13:27:22,208 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-25 13:27:22,226 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-25 13:27:22,227 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-25 13:27:22,227 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-25 13:27:22,233 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-25 13:27:22,234 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-25 13:27:22,235 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-25 13:27:22,236 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-25 13:27:22,237 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-25 13:27:22,237 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-25 13:27:22,238 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-25 13:27:22,239 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-25 13:27:22,239 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-25 13:27:22,240 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-25 13:27:22,242 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-25 13:27:22,244 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-25 13:27:22,245 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-25 13:27:22,246 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-25 13:27:22,247 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-25 13:27:22,250 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-25 13:27:22,250 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-25 13:27:22,250 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-25 13:27:22,251 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-25 13:27:22,252 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-25 13:27:22,253 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-25 13:27:22,253 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-25 13:27:22,255 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-25 13:27:22,255 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-25 13:27:22,255 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-25 13:27:22,256 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-25 13:27:22,256 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-25 13:27:22,257 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-25 13:27:22,258 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-25 13:27:22,258 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-25 13:27:22,272 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-25 13:27:22,272 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-25 13:27:22,273 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-25 13:27:22,273 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-25 13:27:22,274 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-25 13:27:22,274 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-25 13:27:22,274 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-25 13:27:22,274 INFO L133 SettingsManager]: * Use SBE=true [2018-06-25 13:27:22,275 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-25 13:27:22,275 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-25 13:27:22,275 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-25 13:27:22,275 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-25 13:27:22,276 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-25 13:27:22,276 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-25 13:27:22,276 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-25 13:27:22,276 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-25 13:27:22,277 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-25 13:27:22,277 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-25 13:27:22,277 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-25 13:27:22,277 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-25 13:27:22,277 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-25 13:27:22,279 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-25 13:27:22,279 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-25 13:27:22,314 INFO ]: Repository-Root is: /tmp [2018-06-25 13:27:22,329 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-25 13:27:22,336 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-25 13:27:22,337 INFO ]: Initializing SmtParser... [2018-06-25 13:27:22,337 INFO ]: SmtParser initialized [2018-06-25 13:27:22,338 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/sendmail-close-angle.c.smt2 [2018-06-25 13:27:22,338 INFO ]: Parsing .smt2 file as a set of Horn Clauses No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-06-25 13:27:22,424 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/sendmail-close-angle.c.smt2 unknown [2018-06-25 13:27:22,742 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/sendmail-close-angle.c.smt2 [2018-06-25 13:27:22,747 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-25 13:27:22,753 INFO ]: Walking toolchain with 4 elements. [2018-06-25 13:27:22,754 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-25 13:27:22,754 INFO ]: Initializing ChcToBoogie... [2018-06-25 13:27:22,754 INFO ]: ChcToBoogie initialized [2018-06-25 13:27:22,757 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 01:27:22" (1/1) ... [2018-06-25 13:27:22,811 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:27:22 Unit [2018-06-25 13:27:22,811 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-25 13:27:22,812 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-25 13:27:22,812 INFO ]: Initializing Boogie Preprocessor... [2018-06-25 13:27:22,812 INFO ]: Boogie Preprocessor initialized [2018-06-25 13:27:22,833 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:27:22" (1/1) ... [2018-06-25 13:27:22,833 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:27:22" (1/1) ... [2018-06-25 13:27:22,843 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:27:22" (1/1) ... [2018-06-25 13:27:22,843 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:27:22" (1/1) ... [2018-06-25 13:27:22,849 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:27:22" (1/1) ... [2018-06-25 13:27:22,850 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:27:22" (1/1) ... [2018-06-25 13:27:22,852 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:27:22" (1/1) ... [2018-06-25 13:27:22,854 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-25 13:27:22,854 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-25 13:27:22,854 INFO ]: Initializing RCFGBuilder... [2018-06-25 13:27:22,854 INFO ]: RCFGBuilder initialized [2018-06-25 13:27:22,855 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:27:22" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2018-06-25 13:27:22,867 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-25 13:27:22,867 INFO ]: Found specification of procedure gotoProc [2018-06-25 13:27:22,867 INFO ]: Found implementation of procedure gotoProc [2018-06-25 13:27:22,867 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-25 13:27:22,867 INFO ]: Found specification of procedure Ultimate.START [2018-06-25 13:27:22,867 INFO ]: Found implementation of procedure Ultimate.START Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-25 13:27:23,145 INFO ]: Using library mode [2018-06-25 13:27:23,146 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 01:27:23 BoogieIcfgContainer [2018-06-25 13:27:23,146 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-25 13:27:23,147 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-25 13:27:23,147 INFO ]: Initializing TraceAbstraction... [2018-06-25 13:27:23,150 INFO ]: TraceAbstraction initialized [2018-06-25 13:27:23,151 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 01:27:22" (1/3) ... [2018-06-25 13:27:23,151 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72ab82b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 25.06 01:27:23, skipping insertion in model container [2018-06-25 13:27:23,151 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:27:22" (2/3) ... [2018-06-25 13:27:23,152 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72ab82b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.06 01:27:23, skipping insertion in model container [2018-06-25 13:27:23,152 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 01:27:23" (3/3) ... [2018-06-25 13:27:23,153 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-25 13:27:23,162 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-25 13:27:23,180 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-25 13:27:23,249 INFO ]: Using default assertion order modulation [2018-06-25 13:27:23,249 INFO ]: Interprodecural is true [2018-06-25 13:27:23,249 INFO ]: Hoare is false [2018-06-25 13:27:23,249 INFO ]: Compute interpolants for FPandBP [2018-06-25 13:27:23,249 INFO ]: Backedges is TWOTRACK [2018-06-25 13:27:23,249 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-25 13:27:23,249 INFO ]: Difference is false [2018-06-25 13:27:23,249 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-25 13:27:23,249 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-25 13:27:23,260 INFO ]: Start isEmpty. Operand 10 states. [2018-06-25 13:27:23,272 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-25 13:27:23,272 INFO ]: Found error trace [2018-06-25 13:27:23,273 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:27:23,273 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:27:23,278 INFO ]: Analyzing trace with hash 1284994894, now seen corresponding path program 1 times [2018-06-25 13:27:23,280 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:27:23,280 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:27:23,318 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:27:23,318 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:27:23,318 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:27:23,373 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:27:23,496 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:27:23,498 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-25 13:27:23,498 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-25 13:27:23,500 INFO ]: Interpolant automaton has 3 states [2018-06-25 13:27:23,511 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-25 13:27:23,511 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 13:27:23,513 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-25 13:27:23,570 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:27:23,570 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-25 13:27:23,571 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-25 13:27:23,572 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-25 13:27:23,572 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:27:23,584 INFO ]: With dead ends: 9 [2018-06-25 13:27:23,584 INFO ]: Without dead ends: 9 [2018-06-25 13:27:23,586 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 13:27:23,604 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-25 13:27:23,621 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-25 13:27:23,622 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-25 13:27:23,623 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-25 13:27:23,624 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-25 13:27:23,624 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:27:23,624 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-25 13:27:23,624 INFO ]: Interpolant automaton has 3 states. [2018-06-25 13:27:23,624 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-25 13:27:23,625 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-25 13:27:23,625 INFO ]: Found error trace [2018-06-25 13:27:23,625 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:27:23,625 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:27:23,625 INFO ]: Analyzing trace with hash 1180964567, now seen corresponding path program 1 times [2018-06-25 13:27:23,625 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:27:23,625 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:27:23,626 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:27:23,626 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:27:23,626 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:27:23,707 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:27:23,982 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:27:23,982 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:27:23,982 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 13:27:23,989 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:27:24,071 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:27:24,080 INFO ]: Computing forward predicates... [2018-06-25 13:27:24,656 WARN ]: Spent 341.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 5 [2018-06-25 13:27:25,773 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:27:25,797 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:27:25,797 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-25 13:27:25,798 INFO ]: Interpolant automaton has 5 states [2018-06-25 13:27:25,798 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-25 13:27:25,798 INFO ]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-06-25 13:27:25,798 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-06-25 13:27:25,947 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:27:25,947 INFO ]: Finished difference Result 10 states and 10 transitions. [2018-06-25 13:27:25,948 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-25 13:27:25,948 INFO ]: Start accepts. Automaton has 5 states. Word has length 8 [2018-06-25 13:27:25,948 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:27:25,948 INFO ]: With dead ends: 10 [2018-06-25 13:27:25,948 INFO ]: Without dead ends: 10 [2018-06-25 13:27:25,949 INFO ]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-06-25 13:27:25,949 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-25 13:27:25,950 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-25 13:27:25,950 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-25 13:27:25,950 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-06-25 13:27:25,950 INFO ]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-06-25 13:27:25,950 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:27:25,950 INFO ]: Abstraction has 10 states and 10 transitions. [2018-06-25 13:27:25,950 INFO ]: Interpolant automaton has 5 states. [2018-06-25 13:27:25,950 INFO ]: Start isEmpty. Operand 10 states and 10 transitions. [2018-06-25 13:27:25,950 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-25 13:27:25,950 INFO ]: Found error trace [2018-06-25 13:27:25,951 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:27:25,951 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:27:25,951 INFO ]: Analyzing trace with hash -2043975570, now seen corresponding path program 2 times [2018-06-25 13:27:25,951 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:27:25,951 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:27:25,952 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:27:25,952 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:27:25,952 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:27:26,016 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:27:26,353 WARN ]: Spent 175.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 8 [2018-06-25 13:27:26,370 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:27:26,371 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:27:26,371 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 13:27:26,379 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-25 13:27:26,471 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-25 13:27:26,471 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:27:26,474 INFO ]: Computing forward predicates... [2018-06-25 13:27:26,800 WARN ]: Spent 199.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 5 [2018-06-25 13:27:32,768 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 13:27:41,719 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:27:41,752 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:27:41,752 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-06-25 13:27:41,753 INFO ]: Interpolant automaton has 6 states [2018-06-25 13:27:41,753 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-25 13:27:41,753 INFO ]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-06-25 13:27:41,753 INFO ]: Start difference. First operand 10 states and 10 transitions. Second operand 6 states. [2018-06-25 13:27:41,834 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:27:41,834 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-25 13:27:41,834 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-25 13:27:41,834 INFO ]: Start accepts. Automaton has 6 states. Word has length 9 [2018-06-25 13:27:41,835 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:27:41,835 INFO ]: With dead ends: 11 [2018-06-25 13:27:41,835 INFO ]: Without dead ends: 11 [2018-06-25 13:27:41,835 INFO ]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-06-25 13:27:41,835 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-25 13:27:41,836 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-25 13:27:41,836 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-25 13:27:41,837 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-25 13:27:41,837 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-06-25 13:27:41,837 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:27:41,837 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-25 13:27:41,837 INFO ]: Interpolant automaton has 6 states. [2018-06-25 13:27:41,837 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-25 13:27:41,837 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-25 13:27:41,837 INFO ]: Found error trace [2018-06-25 13:27:41,837 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:27:41,838 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:27:41,838 INFO ]: Analyzing trace with hash 1062095287, now seen corresponding path program 3 times [2018-06-25 13:27:41,838 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:27:41,838 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:27:41,839 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:27:41,839 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 13:27:41,839 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:27:41,922 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:27:42,200 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:27:42,200 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:27:42,200 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 13:27:42,206 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-25 13:27:42,283 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-25 13:27:42,283 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:27:42,287 INFO ]: Computing forward predicates... [2018-06-25 13:27:46,089 WARN ]: expecting exponential blowup for input size 8 [2018-06-25 13:27:46,144 WARN ]: expecting exponential blowup for input size 8 [2018-06-25 13:28:06,970 WARN ]: expecting exponential blowup for input size 9 [2018-06-25 13:28:07,476 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:28:07,503 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:28:07,503 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-06-25 13:28:07,504 INFO ]: Interpolant automaton has 7 states [2018-06-25 13:28:07,504 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-25 13:28:07,504 INFO ]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-06-25 13:28:07,504 INFO ]: Start difference. First operand 11 states and 11 transitions. Second operand 7 states. [2018-06-25 13:28:07,612 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:28:07,612 INFO ]: Finished difference Result 12 states and 12 transitions. [2018-06-25 13:28:07,612 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-25 13:28:07,612 INFO ]: Start accepts. Automaton has 7 states. Word has length 10 [2018-06-25 13:28:07,612 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:28:07,612 INFO ]: With dead ends: 12 [2018-06-25 13:28:07,612 INFO ]: Without dead ends: 12 [2018-06-25 13:28:07,613 INFO ]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2018-06-25 13:28:07,613 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-25 13:28:07,614 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-06-25 13:28:07,614 INFO ]: Start removeUnreachable. Operand 12 states. [2018-06-25 13:28:07,614 INFO ]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-06-25 13:28:07,614 INFO ]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-06-25 13:28:07,614 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:28:07,614 INFO ]: Abstraction has 12 states and 12 transitions. [2018-06-25 13:28:07,614 INFO ]: Interpolant automaton has 7 states. [2018-06-25 13:28:07,614 INFO ]: Start isEmpty. Operand 12 states and 12 transitions. [2018-06-25 13:28:07,615 INFO ]: Finished isEmpty. Found accepting run of length 12 [2018-06-25 13:28:07,615 INFO ]: Found error trace [2018-06-25 13:28:07,615 INFO ]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:28:07,615 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:28:07,615 INFO ]: Analyzing trace with hash -1433955954, now seen corresponding path program 4 times [2018-06-25 13:28:07,615 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:28:07,615 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:28:07,616 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:28:07,616 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 13:28:07,616 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:28:07,679 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:28:08,045 WARN ]: Spent 221.00 ms on a formula simplification. DAG size of input: 6 DAG size of output: 3 [2018-06-25 13:28:08,658 WARN ]: Spent 565.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 11 [2018-06-25 13:28:08,712 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:28:08,712 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:28:08,712 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 13:28:08,718 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-25 13:28:08,777 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-25 13:28:08,777 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:28:08,781 INFO ]: Computing forward predicates... Received shutdown request... [2018-06-25 13:28:26,502 INFO ]: Timeout while computing interpolants [2018-06-25 13:28:26,702 WARN ]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 13:28:26,702 WARN ]: Verification canceled [2018-06-25 13:28:26,706 WARN ]: Timeout [2018-06-25 13:28:26,706 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.06 01:28:26 BoogieIcfgContainer [2018-06-25 13:28:26,706 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-25 13:28:26,707 INFO ]: Toolchain (without parser) took 63959.52 ms. Allocated memory was 302.0 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 248.4 MB in the beginning and 935.3 MB in the end (delta: -686.9 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-25 13:28:26,707 INFO ]: SmtParser took 0.06 ms. Allocated memory is still 302.0 MB. Free memory is still 267.5 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-25 13:28:26,708 INFO ]: ChcToBoogie took 57.68 ms. Allocated memory is still 302.0 MB. Free memory was 248.4 MB in the beginning and 246.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-25 13:28:26,708 INFO ]: Boogie Preprocessor took 42.22 ms. Allocated memory is still 302.0 MB. Free memory was 246.4 MB in the beginning and 244.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-25 13:28:26,714 INFO ]: RCFGBuilder took 291.58 ms. Allocated memory is still 302.0 MB. Free memory was 244.4 MB in the beginning and 228.3 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 3.6 GB. [2018-06-25 13:28:26,715 INFO ]: TraceAbstraction took 63558.54 ms. Allocated memory was 302.0 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 228.3 MB in the beginning and 935.3 MB in the end (delta: -706.9 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-25 13:28:26,718 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 302.0 MB. Free memory is still 267.5 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 57.68 ms. Allocated memory is still 302.0 MB. Free memory was 248.4 MB in the beginning and 246.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 42.22 ms. Allocated memory is still 302.0 MB. Free memory was 246.4 MB in the beginning and 244.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 291.58 ms. Allocated memory is still 302.0 MB. Free memory was 244.4 MB in the beginning and 228.3 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 3.6 GB. * TraceAbstraction took 63558.54 ms. Allocated memory was 302.0 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 228.3 MB in the beginning and 935.3 MB in the end (delta: -706.9 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [UNKNOWN] : Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 0). Cancelled while BasicCegarLoop was analyzing trace of length 12 with TraceHistMax 4, while TraceCheckSpWp was constructing forward predicates, while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations, while XnfDer was eliminating 12986 quantified variables from 14 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. TIMEOUT Result, 63.4s OverallTime, 5 OverallIterations, 4 TraceHistogramMax, 0.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 28 SDtfs, 3 SDslu, 57 SDs, 0 SdLazy, 26 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 43.1s InterpolantComputationTime, 61 NumberOfCodeBlocks, 61 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 54 ConstructedInterpolants, 0 QuantifiedInterpolants, 1480 SizeOfPredicates, 18 NumberOfNonLiveVariables, 582 ConjunctsInSsa, 82 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 0/20 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/sendmail-close-angle.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-25_13-28-26-736.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/sendmail-close-angle.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-25_13-28-26-736.csv Completed graceful shutdown