java -Xmx4000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCHC.xml --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/chccomp2018/chcToBoogie_automizer.epf -i /storage/chc-comp/vmt-chc-benchmarks/ctigar/nest-if3.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-55b8104 [2018-06-18 13:31:43,476 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-18 13:31:43,478 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-18 13:31:43,493 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-18 13:31:43,493 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-18 13:31:43,496 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-18 13:31:43,497 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-18 13:31:43,500 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-18 13:31:43,502 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-18 13:31:43,503 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-18 13:31:43,504 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-18 13:31:43,504 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-18 13:31:43,505 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-18 13:31:43,514 INFO L177 SettingsManager]: ChcToBoogie provides no preferences, ignoring... [2018-06-18 13:31:43,514 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-18 13:31:43,515 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-18 13:31:43,517 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-18 13:31:43,518 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-18 13:31:43,522 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-18 13:31:43,523 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-18 13:31:43,524 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-18 13:31:43,527 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-18 13:31:43,527 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-18 13:31:43,528 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-18 13:31:43,528 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-18 13:31:43,529 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-18 13:31:43,530 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-18 13:31:43,533 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-18 13:31:43,534 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-18 13:31:43,534 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-18 13:31:43,535 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-18 13:31:43,535 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-18 13:31:43,535 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-18 13:31:43,539 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-18 13:31:43,540 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-18 13:31:43,540 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chccomp2018/chcToBoogie_automizer.epf [2018-06-18 13:31:43,563 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-18 13:31:43,564 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-18 13:31:43,564 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-18 13:31:43,564 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-18 13:31:43,566 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-18 13:31:43,566 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-18 13:31:43,566 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-18 13:31:43,567 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-18 13:31:43,567 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-18 13:31:43,567 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-18 13:31:43,567 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-18 13:31:43,567 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-18 13:31:43,567 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-18 13:31:43,568 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-18 13:31:43,568 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-18 13:31:43,568 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-18 13:31:43,568 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-18 13:31:43,570 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-18 13:31:43,571 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-18 13:31:43,610 INFO ]: Repository-Root is: /tmp [2018-06-18 13:31:43,622 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-18 13:31:43,631 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-18 13:31:43,632 INFO ]: Initializing SmtParser... [2018-06-18 13:31:43,632 INFO ]: SmtParser initialized [2018-06-18 13:31:43,633 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/nest-if3.c.smt2 [2018-06-18 13:31:43,635 INFO ]: Parsing .smt2 file as a set of Horn Clauses No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-06-18 13:31:43,731 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/nest-if3.c.smt2 unknown [2018-06-18 13:31:44,006 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/nest-if3.c.smt2 [2018-06-18 13:31:44,012 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-18 13:31:44,019 INFO ]: Walking toolchain with 4 elements. [2018-06-18 13:31:44,019 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-18 13:31:44,019 INFO ]: Initializing ChcToBoogie... [2018-06-18 13:31:44,019 INFO ]: ChcToBoogie initialized [2018-06-18 13:31:44,026 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 01:31:44" (1/1) ... [2018-06-18 13:31:44,094 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:31:44 Unit [2018-06-18 13:31:44,094 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-18 13:31:44,095 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-18 13:31:44,095 INFO ]: Initializing Boogie Preprocessor... [2018-06-18 13:31:44,095 INFO ]: Boogie Preprocessor initialized [2018-06-18 13:31:44,115 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:31:44" (1/1) ... [2018-06-18 13:31:44,115 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:31:44" (1/1) ... [2018-06-18 13:31:44,127 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:31:44" (1/1) ... [2018-06-18 13:31:44,127 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:31:44" (1/1) ... [2018-06-18 13:31:44,132 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:31:44" (1/1) ... [2018-06-18 13:31:44,135 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:31:44" (1/1) ... [2018-06-18 13:31:44,136 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:31:44" (1/1) ... [2018-06-18 13:31:44,139 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-18 13:31:44,139 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-18 13:31:44,139 INFO ]: Initializing RCFGBuilder... [2018-06-18 13:31:44,139 INFO ]: RCFGBuilder initialized [2018-06-18 13:31:44,140 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:31:44" (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) [2018-06-18 13:31:44,160 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-18 13:31:44,160 INFO ]: Found specification of procedure False [2018-06-18 13:31:44,161 INFO ]: Found implementation of procedure False [2018-06-18 13:31:44,161 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-18 13:31:44,161 INFO ]: Found specification of procedure state [2018-06-18 13:31:44,161 INFO ]: Found implementation of procedure state [2018-06-18 13:31:44,161 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-18 13:31:44,161 INFO ]: Found specification of procedure Ultimate.START [2018-06-18 13:31:44,161 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 [2018-06-18 13:31:44,380 INFO ]: Using library mode [2018-06-18 13:31:44,381 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 01:31:44 BoogieIcfgContainer [2018-06-18 13:31:44,381 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-18 13:31:44,382 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-18 13:31:44,382 INFO ]: Initializing TraceAbstraction... [2018-06-18 13:31:44,394 INFO ]: TraceAbstraction initialized [2018-06-18 13:31:44,394 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 01:31:44" (1/3) ... [2018-06-18 13:31:44,395 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@678ad74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 18.06 01:31:44, skipping insertion in model container [2018-06-18 13:31:44,395 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:31:44" (2/3) ... [2018-06-18 13:31:44,395 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@678ad74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.06 01:31:44, skipping insertion in model container [2018-06-18 13:31:44,395 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 01:31:44" (3/3) ... [2018-06-18 13:31:44,397 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-18 13:31:44,407 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-18 13:31:44,428 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-18 13:31:44,495 INFO ]: Using default assertion order modulation [2018-06-18 13:31:44,496 INFO ]: Interprodecural is true [2018-06-18 13:31:44,496 INFO ]: Hoare is false [2018-06-18 13:31:44,496 INFO ]: Compute interpolants for FPandBP [2018-06-18 13:31:44,496 INFO ]: Backedges is TWOTRACK [2018-06-18 13:31:44,496 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-18 13:31:44,496 INFO ]: Difference is false [2018-06-18 13:31:44,496 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-18 13:31:44,496 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-18 13:31:44,511 INFO ]: Start isEmpty. Operand 13 states. [2018-06-18 13:31:44,523 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-18 13:31:44,523 INFO ]: Found error trace [2018-06-18 13:31:44,524 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 13:31:44,524 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 13:31:44,529 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-18 13:31:44,531 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 13:31:44,531 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 13:31:44,574 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:31:44,574 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 13:31:44,574 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:31:44,601 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:31:44,608 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 13:31:44,660 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-18 13:31:44,661 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-18 13:31:44,661 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-18 13:31:44,663 INFO ]: Interpolant automaton has 4 states [2018-06-18 13:31:44,676 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-18 13:31:44,677 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-18 13:31:44,678 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-18 13:31:44,786 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 13:31:44,786 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-18 13:31:44,787 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-18 13:31:44,787 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-18 13:31:44,788 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 13:31:44,797 INFO ]: With dead ends: 13 [2018-06-18 13:31:44,797 INFO ]: Without dead ends: 13 [2018-06-18 13:31:44,799 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-18 13:31:44,813 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-18 13:31:44,838 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-18 13:31:44,839 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-18 13:31:44,840 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-18 13:31:44,841 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-18 13:31:44,841 INFO ]: Finished accepts. word is rejected. [2018-06-18 13:31:44,841 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-18 13:31:44,841 INFO ]: Interpolant automaton has 4 states. [2018-06-18 13:31:44,841 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-18 13:31:44,843 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-18 13:31:44,843 INFO ]: Found error trace [2018-06-18 13:31:44,843 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 13:31:44,843 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 13:31:44,843 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-18 13:31:44,843 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 13:31:44,843 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 13:31:44,844 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:31:44,844 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 13:31:44,844 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:31:44,886 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:31:44,887 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 13:31:45,155 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 13:31:45,155 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 13:31:45,155 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-18 13:31:45,162 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 13:31:45,191 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:31:45,201 INFO ]: Computing forward predicates... [2018-06-18 13:31:45,506 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 13:31:45,541 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 13:31:45,541 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-06-18 13:31:45,542 INFO ]: Interpolant automaton has 6 states [2018-06-18 13:31:45,542 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-18 13:31:45,542 INFO ]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-06-18 13:31:45,542 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 6 states. [2018-06-18 13:31:45,695 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 13:31:45,696 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-18 13:31:45,696 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-18 13:31:45,696 INFO ]: Start accepts. Automaton has 6 states. Word has length 13 [2018-06-18 13:31:45,696 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 13:31:45,697 INFO ]: With dead ends: 15 [2018-06-18 13:31:45,697 INFO ]: Without dead ends: 15 [2018-06-18 13:31:45,698 INFO ]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-06-18 13:31:45,698 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-18 13:31:45,700 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-18 13:31:45,700 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-18 13:31:45,701 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-18 13:31:45,701 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-18 13:31:45,701 INFO ]: Finished accepts. word is rejected. [2018-06-18 13:31:45,701 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-18 13:31:45,701 INFO ]: Interpolant automaton has 6 states. [2018-06-18 13:31:45,701 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-18 13:31:45,702 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-18 13:31:45,702 INFO ]: Found error trace [2018-06-18 13:31:45,702 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 13:31:45,702 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 13:31:45,702 INFO ]: Analyzing trace with hash -1486246934, now seen corresponding path program 2 times [2018-06-18 13:31:45,702 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 13:31:45,702 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 13:31:45,703 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:31:45,703 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 13:31:45,704 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:31:45,754 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:31:45,755 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 13:31:46,064 WARN ]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-06-18 13:31:46,275 WARN ]: Spent 187.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2018-06-18 13:31:46,450 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-18 13:31:46,450 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 13:31:46,450 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 [2018-06-18 13:31:46,459 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-18 13:31:46,511 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-18 13:31:46,511 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:31:46,514 INFO ]: Computing forward predicates... [2018-06-18 13:31:47,066 WARN ]: Spent 344.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 8 [2018-06-18 13:31:47,380 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-18 13:31:47,412 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 13:31:47,412 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2018-06-18 13:31:47,412 INFO ]: Interpolant automaton has 11 states [2018-06-18 13:31:47,412 INFO ]: Constructing interpolant automaton starting with 11 interpolants. [2018-06-18 13:31:47,412 INFO ]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2018-06-18 13:31:47,413 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 11 states. [2018-06-18 13:31:47,748 WARN ]: Spent 151.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2018-06-18 13:31:47,775 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 13:31:47,775 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-18 13:31:47,776 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-18 13:31:47,776 INFO ]: Start accepts. Automaton has 11 states. Word has length 17 [2018-06-18 13:31:47,776 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 13:31:47,777 INFO ]: With dead ends: 17 [2018-06-18 13:31:47,777 INFO ]: Without dead ends: 17 [2018-06-18 13:31:47,777 INFO ]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2018-06-18 13:31:47,778 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-18 13:31:47,781 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-18 13:31:47,781 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-18 13:31:47,781 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-18 13:31:47,781 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-18 13:31:47,781 INFO ]: Finished accepts. word is rejected. [2018-06-18 13:31:47,782 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-18 13:31:47,782 INFO ]: Interpolant automaton has 11 states. [2018-06-18 13:31:47,782 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-18 13:31:47,782 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-18 13:31:47,782 INFO ]: Found error trace [2018-06-18 13:31:47,782 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 13:31:47,782 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 13:31:47,783 INFO ]: Analyzing trace with hash -2056434034, now seen corresponding path program 3 times [2018-06-18 13:31:47,783 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 13:31:47,783 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 13:31:47,784 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:31:47,784 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 13:31:47,784 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:31:47,825 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:31:47,826 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 13:31:48,150 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-18 13:31:48,150 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 13:31:48,150 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 [2018-06-18 13:31:48,159 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-18 13:31:48,218 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-18 13:31:48,218 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:31:48,222 INFO ]: Computing forward predicates... [2018-06-18 13:31:48,926 WARN ]: Spent 230.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 9 [2018-06-18 13:31:49,195 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-18 13:31:49,227 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 13:31:49,227 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2018-06-18 13:31:49,227 INFO ]: Interpolant automaton has 15 states [2018-06-18 13:31:49,227 INFO ]: Constructing interpolant automaton starting with 15 interpolants. [2018-06-18 13:31:49,228 INFO ]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2018-06-18 13:31:49,228 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 15 states. [2018-06-18 13:31:49,375 WARN ]: Spent 112.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2018-06-18 13:31:49,701 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 13:31:49,701 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-18 13:31:49,704 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-18 13:31:49,704 INFO ]: Start accepts. Automaton has 15 states. Word has length 21 [2018-06-18 13:31:49,704 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 13:31:49,705 INFO ]: With dead ends: 19 [2018-06-18 13:31:49,705 INFO ]: Without dead ends: 19 [2018-06-18 13:31:49,705 INFO ]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2018-06-18 13:31:49,705 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-18 13:31:49,708 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-18 13:31:49,708 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-18 13:31:49,709 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-18 13:31:49,709 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-18 13:31:49,709 INFO ]: Finished accepts. word is rejected. [2018-06-18 13:31:49,709 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-18 13:31:49,709 INFO ]: Interpolant automaton has 15 states. [2018-06-18 13:31:49,709 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-18 13:31:49,710 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-18 13:31:49,710 INFO ]: Found error trace [2018-06-18 13:31:49,710 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 13:31:49,710 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 13:31:49,710 INFO ]: Analyzing trace with hash -434924750, now seen corresponding path program 4 times [2018-06-18 13:31:49,710 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 13:31:49,710 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 13:31:49,711 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:31:49,711 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 13:31:49,711 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:31:49,754 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:31:49,754 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 13:31:50,081 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-18 13:31:50,081 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 13:31:50,081 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) [2018-06-18 13:31:50,096 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-18 13:31:50,127 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-18 13:31:50,127 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:31:50,131 INFO ]: Computing forward predicates... Received shutdown request... [2018-06-18 13:32:57,638 WARN ]: Removed 2 from assertion stack [2018-06-18 13:32:57,638 INFO ]: Timeout while computing interpolants [2018-06-18 13:32:57,839 WARN ]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-18 13:32:57,839 WARN ]: Verification canceled [2018-06-18 13:32:57,843 WARN ]: Timeout [2018-06-18 13:32:57,844 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.06 01:32:57 BoogieIcfgContainer [2018-06-18 13:32:57,844 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-18 13:32:57,844 INFO ]: Toolchain (without parser) took 73832.23 ms. Allocated memory was 305.7 MB in the beginning and 1.0 GB in the end (delta: 738.2 MB). Free memory was 258.1 MB in the beginning and 947.2 MB in the end (delta: -689.2 MB). Peak memory consumption was 905.1 MB. Max. memory is 3.6 GB. [2018-06-18 13:32:57,846 INFO ]: SmtParser took 0.08 ms. Allocated memory is still 305.7 MB. Free memory is still 270.1 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-18 13:32:57,846 INFO ]: ChcToBoogie took 75.80 ms. Allocated memory is still 305.7 MB. Free memory was 258.1 MB in the beginning and 254.1 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 3.6 GB. [2018-06-18 13:32:57,846 INFO ]: Boogie Preprocessor took 43.54 ms. Allocated memory is still 305.7 MB. Free memory is still 254.1 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-18 13:32:57,847 INFO ]: RCFGBuilder took 241.53 ms. Allocated memory is still 305.7 MB. Free memory was 254.1 MB in the beginning and 244.1 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 3.6 GB. [2018-06-18 13:32:57,847 INFO ]: TraceAbstraction took 73461.54 ms. Allocated memory was 305.7 MB in the beginning and 1.0 GB in the end (delta: 738.2 MB). Free memory was 244.1 MB in the beginning and 947.2 MB in the end (delta: -703.1 MB). Peak memory consumption was 891.1 MB. Max. memory is 3.6 GB. [2018-06-18 13:32:57,853 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 305.7 MB. Free memory is still 270.1 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 75.80 ms. Allocated memory is still 305.7 MB. Free memory was 258.1 MB in the beginning and 254.1 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 43.54 ms. Allocated memory is still 305.7 MB. Free memory is still 254.1 MB. There was no memory consumed. Max. memory is 3.6 GB. * RCFGBuilder took 241.53 ms. Allocated memory is still 305.7 MB. Free memory was 254.1 MB in the beginning and 244.1 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 73461.54 ms. Allocated memory was 305.7 MB in the beginning and 1.0 GB in the end (delta: 738.2 MB). Free memory was 244.1 MB in the beginning and 947.2 MB in the end (delta: -703.1 MB). Peak memory consumption was 891.1 MB. 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 26 with TraceHistMax 5, while TraceCheckSpWp was constructing forward predicates, while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 5001. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 73.3s OverallTime, 5 OverallIterations, 5 TraceHistogramMax, 1.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 44 SDtfs, 37 SDslu, 127 SDs, 0 SdLazy, 95 SolverSat, 42 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 83 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 3.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred 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, 0.2s SatisfiabilityAnalysisTime, 3.5s InterpolantComputationTime, 111 NumberOfCodeBlocks, 111 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 104 ConstructedInterpolants, 0 QuantifiedInterpolants, 9040 SizeOfPredicates, 93 NumberOfNonLiveVariables, 345 ConjunctsInSsa, 65 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 20/68 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/nest-if3.c.smt2_chcToBoogie_automizer.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-18_13-32-57-874.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/nest-if3.c.smt2_chcToBoogie_automizer.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-18_13-32-57-874.csv Completed graceful shutdown