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/nested9.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-14921ce [2018-06-25 13:15:29,931 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-25 13:15:29,933 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-25 13:15:29,944 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-25 13:15:29,944 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-25 13:15:29,945 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-25 13:15:29,946 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-25 13:15:29,948 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-25 13:15:29,950 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-25 13:15:29,951 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-25 13:15:29,951 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-25 13:15:29,952 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-25 13:15:29,953 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-25 13:15:29,954 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-25 13:15:29,954 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-25 13:15:29,955 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-25 13:15:29,957 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-25 13:15:29,959 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-25 13:15:29,960 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-25 13:15:29,961 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-25 13:15:29,962 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-25 13:15:29,965 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-25 13:15:29,965 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-25 13:15:29,965 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-25 13:15:29,966 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-25 13:15:29,967 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-25 13:15:29,968 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-25 13:15:29,969 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-25 13:15:29,970 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-25 13:15:29,970 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-25 13:15:29,971 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-25 13:15:29,971 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-25 13:15:29,972 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-25 13:15:29,972 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-25 13:15:29,973 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-25 13:15:29,973 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-25 13:15:29,987 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-25 13:15:29,988 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-25 13:15:29,988 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-25 13:15:29,988 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-25 13:15:29,989 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-25 13:15:29,989 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-25 13:15:29,990 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-25 13:15:29,990 INFO L133 SettingsManager]: * Use SBE=true [2018-06-25 13:15:29,990 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-25 13:15:29,990 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-25 13:15:29,991 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-25 13:15:29,991 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-25 13:15:29,991 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-25 13:15:29,991 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-25 13:15:29,992 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-25 13:15:29,992 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-25 13:15:29,992 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-25 13:15:29,992 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-25 13:15:29,992 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-25 13:15:29,993 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-25 13:15:29,993 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-25 13:15:29,994 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-25 13:15:29,995 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-25 13:15:30,034 INFO ]: Repository-Root is: /tmp [2018-06-25 13:15:30,046 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-25 13:15:30,049 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-25 13:15:30,051 INFO ]: Initializing SmtParser... [2018-06-25 13:15:30,051 INFO ]: SmtParser initialized [2018-06-25 13:15:30,052 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/nested9.c.smt2 [2018-06-25 13:15:30,053 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 13:15:30,150 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/nested9.c.smt2 unknown [2018-06-25 13:15:30,467 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/nested9.c.smt2 [2018-06-25 13:15:30,472 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-25 13:15:30,483 INFO ]: Walking toolchain with 4 elements. [2018-06-25 13:15:30,483 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-25 13:15:30,483 INFO ]: Initializing ChcToBoogie... [2018-06-25 13:15:30,483 INFO ]: ChcToBoogie initialized [2018-06-25 13:15:30,487 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 01:15:30" (1/1) ... [2018-06-25 13:15:30,540 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:15:30 Unit [2018-06-25 13:15:30,540 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-25 13:15:30,541 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-25 13:15:30,541 INFO ]: Initializing Boogie Preprocessor... [2018-06-25 13:15:30,541 INFO ]: Boogie Preprocessor initialized [2018-06-25 13:15:30,556 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:15:30" (1/1) ... [2018-06-25 13:15:30,556 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:15:30" (1/1) ... [2018-06-25 13:15:30,561 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:15:30" (1/1) ... [2018-06-25 13:15:30,561 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:15:30" (1/1) ... [2018-06-25 13:15:30,567 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:15:30" (1/1) ... [2018-06-25 13:15:30,569 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:15:30" (1/1) ... [2018-06-25 13:15:30,570 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:15:30" (1/1) ... [2018-06-25 13:15:30,572 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-25 13:15:30,573 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-25 13:15:30,573 INFO ]: Initializing RCFGBuilder... [2018-06-25 13:15:30,573 INFO ]: RCFGBuilder initialized [2018-06-25 13:15:30,574 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:15:30" (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 13:15:30,589 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-25 13:15:30,589 INFO ]: Found specification of procedure gotoProc [2018-06-25 13:15:30,589 INFO ]: Found implementation of procedure gotoProc [2018-06-25 13:15:30,589 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-25 13:15:30,589 INFO ]: Found specification of procedure Ultimate.START [2018-06-25 13:15:30,589 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 13:15:30,837 INFO ]: Using library mode [2018-06-25 13:15:30,838 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 01:15:30 BoogieIcfgContainer [2018-06-25 13:15:30,838 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-25 13:15:30,847 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-25 13:15:30,847 INFO ]: Initializing TraceAbstraction... [2018-06-25 13:15:30,850 INFO ]: TraceAbstraction initialized [2018-06-25 13:15:30,850 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 01:15:30" (1/3) ... [2018-06-25 13:15:30,851 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62aff8f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 25.06 01:15:30, skipping insertion in model container [2018-06-25 13:15:30,851 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:15:30" (2/3) ... [2018-06-25 13:15:30,851 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62aff8f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.06 01:15:30, skipping insertion in model container [2018-06-25 13:15:30,851 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 01:15:30" (3/3) ... [2018-06-25 13:15:30,858 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-25 13:15:30,868 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-25 13:15:30,876 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-25 13:15:30,924 INFO ]: Using default assertion order modulation [2018-06-25 13:15:30,924 INFO ]: Interprodecural is true [2018-06-25 13:15:30,924 INFO ]: Hoare is false [2018-06-25 13:15:30,924 INFO ]: Compute interpolants for FPandBP [2018-06-25 13:15:30,924 INFO ]: Backedges is TWOTRACK [2018-06-25 13:15:30,924 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-25 13:15:30,924 INFO ]: Difference is false [2018-06-25 13:15:30,925 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-25 13:15:30,925 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-25 13:15:30,939 INFO ]: Start isEmpty. Operand 10 states. [2018-06-25 13:15:30,948 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-25 13:15:30,949 INFO ]: Found error trace [2018-06-25 13:15:30,949 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:15:30,950 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:15:30,955 INFO ]: Analyzing trace with hash 1284994894, now seen corresponding path program 1 times [2018-06-25 13:15:30,958 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:15:30,958 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:15:31,001 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:15:31,002 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:15:31,002 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:15:31,040 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:15:31,093 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:15:31,095 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-25 13:15:31,095 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-25 13:15:31,097 INFO ]: Interpolant automaton has 3 states [2018-06-25 13:15:31,107 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-25 13:15:31,108 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 13:15:31,109 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-25 13:15:31,171 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:15:31,171 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-25 13:15:31,172 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-25 13:15:31,173 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-25 13:15:31,173 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:15:31,182 INFO ]: With dead ends: 9 [2018-06-25 13:15:31,182 INFO ]: Without dead ends: 9 [2018-06-25 13:15:31,184 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 13:15:31,199 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-25 13:15:31,213 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-25 13:15:31,215 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-25 13:15:31,215 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-25 13:15:31,216 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-25 13:15:31,217 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:15:31,217 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-25 13:15:31,217 INFO ]: Interpolant automaton has 3 states. [2018-06-25 13:15:31,217 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-25 13:15:31,217 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-25 13:15:31,217 INFO ]: Found error trace [2018-06-25 13:15:31,217 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:15:31,217 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:15:31,218 INFO ]: Analyzing trace with hash 1180964567, now seen corresponding path program 1 times [2018-06-25 13:15:31,218 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:15:31,218 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:15:31,218 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:15:31,218 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:15:31,219 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:15:31,283 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:15:31,455 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:15:31,455 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:15:31,455 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 13:15:31,462 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:15:31,513 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:15:31,524 INFO ]: Computing forward predicates... [2018-06-25 13:15:33,887 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:15:33,922 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:15:33,922 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-25 13:15:33,923 INFO ]: Interpolant automaton has 5 states [2018-06-25 13:15:33,923 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-25 13:15:33,923 INFO ]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-06-25 13:15:33,923 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-06-25 13:15:34,055 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:15:34,055 INFO ]: Finished difference Result 10 states and 10 transitions. [2018-06-25 13:15:34,056 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-25 13:15:34,056 INFO ]: Start accepts. Automaton has 5 states. Word has length 8 [2018-06-25 13:15:34,056 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:15:34,056 INFO ]: With dead ends: 10 [2018-06-25 13:15:34,056 INFO ]: Without dead ends: 10 [2018-06-25 13:15:34,057 INFO ]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-06-25 13:15:34,057 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-25 13:15:34,058 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-25 13:15:34,058 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-25 13:15:34,059 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-06-25 13:15:34,059 INFO ]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-06-25 13:15:34,059 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:15:34,059 INFO ]: Abstraction has 10 states and 10 transitions. [2018-06-25 13:15:34,059 INFO ]: Interpolant automaton has 5 states. [2018-06-25 13:15:34,059 INFO ]: Start isEmpty. Operand 10 states and 10 transitions. [2018-06-25 13:15:34,059 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-25 13:15:34,059 INFO ]: Found error trace [2018-06-25 13:15:34,059 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:15:34,059 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:15:34,059 INFO ]: Analyzing trace with hash -2043975570, now seen corresponding path program 2 times [2018-06-25 13:15:34,059 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:15:34,059 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:15:34,060 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:15:34,060 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:15:34,060 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:15:34,140 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:15:34,298 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:15:34,298 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:15:34,298 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 13:15:34,305 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-25 13:15:34,353 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-25 13:15:34,353 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:15:34,356 INFO ]: Computing forward predicates... [2018-06-25 13:15:36,019 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:15:36,039 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:15:36,039 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-06-25 13:15:36,040 INFO ]: Interpolant automaton has 6 states [2018-06-25 13:15:36,040 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-25 13:15:36,040 INFO ]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-06-25 13:15:36,040 INFO ]: Start difference. First operand 10 states and 10 transitions. Second operand 6 states. [2018-06-25 13:15:36,148 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:15:36,149 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-25 13:15:36,149 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-25 13:15:36,149 INFO ]: Start accepts. Automaton has 6 states. Word has length 9 [2018-06-25 13:15:36,149 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:15:36,149 INFO ]: With dead ends: 11 [2018-06-25 13:15:36,149 INFO ]: Without dead ends: 11 [2018-06-25 13:15:36,149 INFO ]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2018-06-25 13:15:36,149 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-25 13:15:36,150 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-25 13:15:36,150 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-25 13:15:36,151 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-25 13:15:36,151 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-06-25 13:15:36,151 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:15:36,151 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-25 13:15:36,151 INFO ]: Interpolant automaton has 6 states. [2018-06-25 13:15:36,151 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-25 13:15:36,151 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-25 13:15:36,151 INFO ]: Found error trace [2018-06-25 13:15:36,151 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:15:36,152 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:15:36,152 INFO ]: Analyzing trace with hash 1062095287, now seen corresponding path program 3 times [2018-06-25 13:15:36,152 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:15:36,152 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:15:36,153 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:15:36,153 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 13:15:36,153 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:15:36,199 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:15:36,336 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:15:36,336 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:15:36,336 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) [2018-06-25 13:15:36,350 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 13:15:36,434 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-25 13:15:36,434 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:15:36,439 INFO ]: Computing forward predicates... Received shutdown request... [2018-06-25 13:16:38,414 INFO ]: Timeout while computing interpolants [2018-06-25 13:16:38,614 WARN ]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 13:16:38,615 WARN ]: Verification canceled [2018-06-25 13:16:38,618 WARN ]: Timeout [2018-06-25 13:16:38,618 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.06 01:16:38 BoogieIcfgContainer [2018-06-25 13:16:38,618 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-25 13:16:38,619 INFO ]: Toolchain (without parser) took 68146.92 ms. Allocated memory was 309.3 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 259.7 MB in the beginning and 1.1 GB in the end (delta: -835.5 MB). Peak memory consumption was 1.4 GB. Max. memory is 3.6 GB. [2018-06-25 13:16:38,621 INFO ]: SmtParser took 0.08 ms. Allocated memory is still 309.3 MB. Free memory is still 273.8 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-25 13:16:38,621 INFO ]: ChcToBoogie took 57.49 ms. Allocated memory is still 309.3 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 13:16:38,622 INFO ]: Boogie Preprocessor took 31.41 ms. Allocated memory is still 309.3 MB. Free memory was 257.7 MB in the beginning and 255.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-25 13:16:38,622 INFO ]: RCFGBuilder took 265.17 ms. Allocated memory is still 309.3 MB. Free memory was 255.7 MB in the beginning and 245.8 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 3.6 GB. [2018-06-25 13:16:38,623 INFO ]: TraceAbstraction took 67771.85 ms. Allocated memory was 309.3 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 245.8 MB in the beginning and 1.1 GB in the end (delta: -849.5 MB). Peak memory consumption was 1.4 GB. Max. memory is 3.6 GB. [2018-06-25 13:16:38,626 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.08 ms. Allocated memory is still 309.3 MB. Free memory is still 273.8 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 57.49 ms. Allocated memory is still 309.3 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 31.41 ms. Allocated memory is still 309.3 MB. Free memory was 257.7 MB in the beginning and 255.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 265.17 ms. Allocated memory is still 309.3 MB. Free memory was 255.7 MB in the beginning and 245.8 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 67771.85 ms. Allocated memory was 309.3 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 245.8 MB in the beginning and 1.1 GB in the end (delta: -849.5 MB). Peak memory consumption was 1.4 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 11 with TraceHistMax 3, while TraceCheckSpWp was constructing forward predicates, while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations, while XnfDer was eliminating 49076 quantified variables from 15 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. TIMEOUT Result, 67.7s OverallTime, 4 OverallIterations, 3 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 21 SDtfs, 3 SDslu, 37 SDs, 0 SdLazy, 16 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 4.4s InterpolantComputationTime, 41 NumberOfCodeBlocks, 41 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 36 ConstructedInterpolants, 0 QuantifiedInterpolants, 559 SizeOfPredicates, 10 NumberOfNonLiveVariables, 233 ConjunctsInSsa, 37 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 0/8 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/nested9.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-25_13-16-38-638.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/nested9.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-25_13-16-38-638.csv Completed graceful shutdown