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/gulv.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-14921ce [2018-06-25 13:02:22,812 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-25 13:02:22,814 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-25 13:02:22,828 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-25 13:02:22,829 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-25 13:02:22,830 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-25 13:02:22,831 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-25 13:02:22,835 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-25 13:02:22,838 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-25 13:02:22,839 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-25 13:02:22,840 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-25 13:02:22,840 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-25 13:02:22,841 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-25 13:02:22,844 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-25 13:02:22,845 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-25 13:02:22,846 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-25 13:02:22,860 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-25 13:02:22,862 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-25 13:02:22,863 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-25 13:02:22,864 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-25 13:02:22,865 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-25 13:02:22,867 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-25 13:02:22,867 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-25 13:02:22,868 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-25 13:02:22,869 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-25 13:02:22,872 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-25 13:02:22,873 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-25 13:02:22,874 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-25 13:02:22,875 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-25 13:02:22,878 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-25 13:02:22,879 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-25 13:02:22,880 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-25 13:02:22,880 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-25 13:02:22,881 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-25 13:02:22,881 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-25 13:02:22,883 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-25 13:02:22,905 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-25 13:02:22,907 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-25 13:02:22,908 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-25 13:02:22,908 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-25 13:02:22,909 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-25 13:02:22,909 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-25 13:02:22,909 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-25 13:02:22,910 INFO L133 SettingsManager]: * Use SBE=true [2018-06-25 13:02:22,910 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-25 13:02:22,910 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-25 13:02:22,910 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-25 13:02:22,910 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-25 13:02:22,911 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-25 13:02:22,912 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-25 13:02:22,912 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-25 13:02:22,912 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-25 13:02:22,912 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-25 13:02:22,913 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-25 13:02:22,913 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-25 13:02:22,913 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-25 13:02:22,913 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-25 13:02:22,915 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-25 13:02:22,916 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-25 13:02:22,962 INFO ]: Repository-Root is: /tmp [2018-06-25 13:02:22,977 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-25 13:02:22,982 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-25 13:02:22,984 INFO ]: Initializing SmtParser... [2018-06-25 13:02:22,985 INFO ]: SmtParser initialized [2018-06-25 13:02:22,985 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/gulv.c.smt2 [2018-06-25 13:02:22,986 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 13:02:23,082 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/gulv.c.smt2 unknown [2018-06-25 13:02:23,347 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/gulv.c.smt2 [2018-06-25 13:02:23,352 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-25 13:02:23,358 INFO ]: Walking toolchain with 4 elements. [2018-06-25 13:02:23,359 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-25 13:02:23,359 INFO ]: Initializing ChcToBoogie... [2018-06-25 13:02:23,359 INFO ]: ChcToBoogie initialized [2018-06-25 13:02:23,363 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 01:02:23" (1/1) ... [2018-06-25 13:02:23,428 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:02:23 Unit [2018-06-25 13:02:23,428 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-25 13:02:23,429 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-25 13:02:23,429 INFO ]: Initializing Boogie Preprocessor... [2018-06-25 13:02:23,429 INFO ]: Boogie Preprocessor initialized [2018-06-25 13:02:23,449 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:02:23" (1/1) ... [2018-06-25 13:02:23,449 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:02:23" (1/1) ... [2018-06-25 13:02:23,456 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:02:23" (1/1) ... [2018-06-25 13:02:23,456 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:02:23" (1/1) ... [2018-06-25 13:02:23,468 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:02:23" (1/1) ... [2018-06-25 13:02:23,470 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:02:23" (1/1) ... [2018-06-25 13:02:23,480 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:02:23" (1/1) ... [2018-06-25 13:02:23,482 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-25 13:02:23,482 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-25 13:02:23,482 INFO ]: Initializing RCFGBuilder... [2018-06-25 13:02:23,482 INFO ]: RCFGBuilder initialized [2018-06-25 13:02:23,483 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:02:23" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-25 13:02:23,509 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-25 13:02:23,509 INFO ]: Found specification of procedure gotoProc [2018-06-25 13:02:23,509 INFO ]: Found implementation of procedure gotoProc [2018-06-25 13:02:23,509 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-25 13:02:23,509 INFO ]: Found specification of procedure Ultimate.START [2018-06-25 13:02:23,509 INFO ]: Found implementation of procedure Ultimate.START [2018-06-25 13:02:23,766 INFO ]: Using library mode [2018-06-25 13:02:23,767 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 01:02:23 BoogieIcfgContainer [2018-06-25 13:02:23,767 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-25 13:02:23,768 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-25 13:02:23,768 INFO ]: Initializing TraceAbstraction... [2018-06-25 13:02:23,771 INFO ]: TraceAbstraction initialized [2018-06-25 13:02:23,772 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 01:02:23" (1/3) ... [2018-06-25 13:02:23,773 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f1096db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 25.06 01:02:23, skipping insertion in model container [2018-06-25 13:02:23,773 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:02:23" (2/3) ... [2018-06-25 13:02:23,773 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f1096db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.06 01:02:23, skipping insertion in model container [2018-06-25 13:02:23,773 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 01:02:23" (3/3) ... [2018-06-25 13:02:23,775 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-25 13:02:23,785 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-25 13:02:23,794 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-25 13:02:23,842 INFO ]: Using default assertion order modulation [2018-06-25 13:02:23,843 INFO ]: Interprodecural is true [2018-06-25 13:02:23,843 INFO ]: Hoare is false [2018-06-25 13:02:23,843 INFO ]: Compute interpolants for FPandBP [2018-06-25 13:02:23,843 INFO ]: Backedges is TWOTRACK [2018-06-25 13:02:23,843 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-25 13:02:23,843 INFO ]: Difference is false [2018-06-25 13:02:23,843 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-25 13:02:23,843 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-25 13:02:23,858 INFO ]: Start isEmpty. Operand 10 states. [2018-06-25 13:02:23,867 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-25 13:02:23,867 INFO ]: Found error trace [2018-06-25 13:02:23,868 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:02:23,868 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:02:23,873 INFO ]: Analyzing trace with hash 1284994894, now seen corresponding path program 1 times [2018-06-25 13:02:23,875 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:02:23,875 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:02:23,908 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:02:23,908 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:02:23,908 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:02:23,950 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:02:24,065 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:02:24,069 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-25 13:02:24,070 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-25 13:02:24,071 INFO ]: Interpolant automaton has 3 states [2018-06-25 13:02:24,085 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-25 13:02:24,086 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 13:02:24,088 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-25 13:02:24,165 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:02:24,165 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-25 13:02:24,166 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-25 13:02:24,167 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-25 13:02:24,168 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:02:24,176 INFO ]: With dead ends: 9 [2018-06-25 13:02:24,176 INFO ]: Without dead ends: 9 [2018-06-25 13:02:24,178 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 13:02:24,196 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-25 13:02:24,211 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-25 13:02:24,212 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-25 13:02:24,213 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-25 13:02:24,214 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-25 13:02:24,214 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:02:24,214 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-25 13:02:24,214 INFO ]: Interpolant automaton has 3 states. [2018-06-25 13:02:24,214 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-25 13:02:24,215 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-25 13:02:24,215 INFO ]: Found error trace [2018-06-25 13:02:24,215 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:02:24,215 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:02:24,215 INFO ]: Analyzing trace with hash 1180964567, now seen corresponding path program 1 times [2018-06-25 13:02:24,215 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:02:24,215 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:02:24,217 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:02:24,217 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:02:24,217 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:02:24,288 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:02:24,405 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:02:24,405 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:02:24,405 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 13:02:24,413 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:02:24,460 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:02:24,469 INFO ]: Computing forward predicates... [2018-06-25 13:02:24,823 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:02:24,843 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:02:24,843 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-25 13:02:24,843 INFO ]: Interpolant automaton has 5 states [2018-06-25 13:02:24,844 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-25 13:02:24,844 INFO ]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-06-25 13:02:24,844 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-06-25 13:02:24,971 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:02:24,971 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-25 13:02:24,972 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-25 13:02:24,972 INFO ]: Start accepts. Automaton has 5 states. Word has length 8 [2018-06-25 13:02:24,972 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:02:24,972 INFO ]: With dead ends: 11 [2018-06-25 13:02:24,972 INFO ]: Without dead ends: 11 [2018-06-25 13:02:24,973 INFO ]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-06-25 13:02:24,973 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-25 13:02:24,974 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-25 13:02:24,974 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-25 13:02:24,975 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-25 13:02:24,975 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-06-25 13:02:24,975 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:02:24,975 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-25 13:02:24,975 INFO ]: Interpolant automaton has 5 states. [2018-06-25 13:02:24,975 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-25 13:02:24,975 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-25 13:02:24,975 INFO ]: Found error trace [2018-06-25 13:02:24,975 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:02:24,975 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:02:24,976 INFO ]: Analyzing trace with hash 1062095287, now seen corresponding path program 2 times [2018-06-25 13:02:24,976 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:02:24,976 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:02:24,976 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:02:24,976 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:02:24,976 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:02:25,057 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:02:25,452 WARN ]: Spent 215.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2018-06-25 13:02:25,627 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:02:25,628 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:02:25,628 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-06-25 13:02:25,644 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 13:02:25,730 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-25 13:02:25,730 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:02:25,734 INFO ]: Computing forward predicates... [2018-06-25 13:02:28,755 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:02:28,786 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:02:28,786 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-06-25 13:02:28,786 INFO ]: Interpolant automaton has 7 states [2018-06-25 13:02:28,786 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-25 13:02:28,787 INFO ]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-06-25 13:02:28,787 INFO ]: Start difference. First operand 11 states and 11 transitions. Second operand 7 states. [2018-06-25 13:02:28,968 WARN ]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-25 13:02:30,267 WARN ]: Spent 1.20 s on a formula simplification. DAG size of input: 15 DAG size of output: 14 [2018-06-25 13:02:30,576 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:02:30,576 INFO ]: Finished difference Result 12 states and 12 transitions. [2018-06-25 13:02:30,576 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-25 13:02:30,576 INFO ]: Start accepts. Automaton has 7 states. Word has length 10 [2018-06-25 13:02:30,576 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:02:30,576 INFO ]: With dead ends: 12 [2018-06-25 13:02:30,576 INFO ]: Without dead ends: 12 [2018-06-25 13:02:30,577 INFO ]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2018-06-25 13:02:30,577 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-25 13:02:30,578 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-06-25 13:02:30,578 INFO ]: Start removeUnreachable. Operand 12 states. [2018-06-25 13:02:30,579 INFO ]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-06-25 13:02:30,579 INFO ]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-06-25 13:02:30,579 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:02:30,579 INFO ]: Abstraction has 12 states and 12 transitions. [2018-06-25 13:02:30,579 INFO ]: Interpolant automaton has 7 states. [2018-06-25 13:02:30,579 INFO ]: Start isEmpty. Operand 12 states and 12 transitions. [2018-06-25 13:02:30,579 INFO ]: Finished isEmpty. Found accepting run of length 12 [2018-06-25 13:02:30,579 INFO ]: Found error trace [2018-06-25 13:02:30,579 INFO ]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:02:30,579 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:02:30,579 INFO ]: Analyzing trace with hash -1433955954, now seen corresponding path program 3 times [2018-06-25 13:02:30,579 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:02:30,579 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:02:30,580 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:02:30,580 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 13:02:30,580 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:02:30,657 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:02:30,861 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:02:30,861 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:02:30,861 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 13:02:30,871 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-25 13:02:30,948 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-25 13:02:30,948 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:02:30,953 INFO ]: Computing forward predicates... [2018-06-25 13:02:32,859 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 13:02:33,004 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 13:02:33,013 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 13:02:33,035 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 13:02:33,108 WARN ]: expecting exponential blowup for input size 7 [2018-06-25 13:02:33,118 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 13:03:17,756 WARN ]: expecting exponential blowup for input size 7 [2018-06-25 13:03:19,912 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:03:19,934 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:03:19,934 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2018-06-25 13:03:19,935 INFO ]: Interpolant automaton has 9 states [2018-06-25 13:03:19,935 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-25 13:03:19,935 INFO ]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2018-06-25 13:03:19,936 INFO ]: Start difference. First operand 12 states and 12 transitions. Second operand 9 states. [2018-06-25 13:03:20,162 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:03:20,162 INFO ]: Finished difference Result 13 states and 13 transitions. [2018-06-25 13:03:20,162 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-25 13:03:20,162 INFO ]: Start accepts. Automaton has 9 states. Word has length 11 [2018-06-25 13:03:20,162 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:03:20,162 INFO ]: With dead ends: 13 [2018-06-25 13:03:20,162 INFO ]: Without dead ends: 13 [2018-06-25 13:03:20,163 INFO ]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2018-06-25 13:03:20,163 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-25 13:03:20,164 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-25 13:03:20,164 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-25 13:03:20,167 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-06-25 13:03:20,167 INFO ]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-06-25 13:03:20,167 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:03:20,167 INFO ]: Abstraction has 13 states and 13 transitions. [2018-06-25 13:03:20,167 INFO ]: Interpolant automaton has 9 states. [2018-06-25 13:03:20,167 INFO ]: Start isEmpty. Operand 13 states and 13 transitions. [2018-06-25 13:03:20,168 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-25 13:03:20,168 INFO ]: Found error trace [2018-06-25 13:03:20,168 INFO ]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:03:20,168 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:03:20,168 INFO ]: Analyzing trace with hash -1502133097, now seen corresponding path program 4 times [2018-06-25 13:03:20,168 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:03:20,168 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:03:20,169 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:03:20,169 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 13:03:20,169 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:03:20,298 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:03:20,698 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:03:20,698 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:03:20,698 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 13:03:20,703 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-25 13:03:20,770 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-25 13:03:20,770 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:03:20,775 INFO ]: Computing forward predicates... [2018-06-25 13:03:21,884 WARN ]: expecting exponential blowup for input size 7 [2018-06-25 13:03:21,943 WARN ]: expecting exponential blowup for input size 7 [2018-06-25 13:03:21,997 WARN ]: expecting exponential blowup for input size 8 [2018-06-25 13:03:22,103 WARN ]: expecting exponential blowup for input size 7 Received shutdown request... [2018-06-25 13:03:28,605 INFO ]: Timeout while computing interpolants [2018-06-25 13:03:28,806 WARN ]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 13:03:28,806 WARN ]: Verification canceled [2018-06-25 13:03:28,812 WARN ]: Timeout [2018-06-25 13:03:28,812 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.06 01:03:28 BoogieIcfgContainer [2018-06-25 13:03:28,812 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-25 13:03:28,813 INFO ]: Toolchain (without parser) took 65460.24 ms. Allocated memory was 308.3 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 260.7 MB in the beginning and 1.2 GB in the end (delta: -941.9 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-25 13:03:28,814 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 308.3 MB. Free memory is still 273.8 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-25 13:03:28,814 INFO ]: ChcToBoogie took 69.27 ms. Allocated memory is still 308.3 MB. Free memory was 259.7 MB in the beginning and 257.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-25 13:03:28,827 INFO ]: Boogie Preprocessor took 53.42 ms. Allocated memory is still 308.3 MB. Free memory was 257.7 MB in the beginning and 256.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 3.6 GB. [2018-06-25 13:03:28,828 INFO ]: RCFGBuilder took 284.50 ms. Allocated memory is still 308.3 MB. Free memory was 256.6 MB in the beginning and 245.6 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 3.6 GB. [2018-06-25 13:03:28,828 INFO ]: TraceAbstraction took 65043.84 ms. Allocated memory was 308.3 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 245.6 MB in the beginning and 1.2 GB in the end (delta: -957.0 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-25 13:03:28,831 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.07 ms. Allocated memory is still 308.3 MB. Free memory is still 273.8 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 69.27 ms. Allocated memory is still 308.3 MB. Free memory was 259.7 MB in the beginning and 257.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 53.42 ms. Allocated memory is still 308.3 MB. Free memory was 257.7 MB in the beginning and 256.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 3.6 GB. * RCFGBuilder took 284.50 ms. Allocated memory is still 308.3 MB. Free memory was 256.6 MB in the beginning and 245.6 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 65043.84 ms. Allocated memory was 308.3 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 245.6 MB in the beginning and 1.2 GB in the end (delta: -957.0 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 13 with TraceHistMax 5, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 18 quantified variables from 10 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. TIMEOUT Result, 64.9s OverallTime, 5 OverallIterations, 5 TraceHistogramMax, 2.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 28 SDtfs, 5 SDslu, 66 SDs, 0 SdLazy, 29 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 7 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 3.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred 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, 53.3s InterpolantComputationTime, 65 NumberOfCodeBlocks, 65 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 58 ConstructedInterpolants, 0 QuantifiedInterpolants, 2237 SizeOfPredicates, 15 NumberOfNonLiveVariables, 477 ConjunctsInSsa, 99 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 0/34 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/gulv.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-25_13-03-28-849.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/gulv.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-25_13-03-28-849.csv Completed graceful shutdown