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/cav12/s3_srvr_2_BUG.cil.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-14921ce [2018-06-25 12:15:29,962 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-25 12:15:29,964 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-25 12:15:29,977 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-25 12:15:29,978 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-25 12:15:29,978 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-25 12:15:29,982 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-25 12:15:29,984 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-25 12:15:29,985 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-25 12:15:29,986 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-25 12:15:29,988 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-25 12:15:29,989 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-25 12:15:29,989 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-25 12:15:29,990 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-25 12:15:29,991 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-25 12:15:29,994 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-25 12:15:29,995 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-25 12:15:30,007 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-25 12:15:30,009 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-25 12:15:30,010 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-25 12:15:30,011 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-25 12:15:30,013 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-25 12:15:30,013 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-25 12:15:30,013 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-25 12:15:30,014 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-25 12:15:30,018 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-25 12:15:30,019 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-25 12:15:30,020 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-25 12:15:30,021 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-25 12:15:30,021 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-25 12:15:30,022 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-25 12:15:30,022 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-25 12:15:30,023 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-25 12:15:30,023 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-25 12:15:30,024 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-25 12:15:30,024 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-25 12:15:30,038 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-25 12:15:30,038 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-25 12:15:30,038 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-25 12:15:30,038 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-25 12:15:30,039 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-25 12:15:30,040 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-25 12:15:30,040 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-25 12:15:30,040 INFO L133 SettingsManager]: * Use SBE=true [2018-06-25 12:15:30,040 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-25 12:15:30,040 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-25 12:15:30,041 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-25 12:15:30,041 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-25 12:15:30,041 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-25 12:15:30,041 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-25 12:15:30,041 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-25 12:15:30,042 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-25 12:15:30,043 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-25 12:15:30,043 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-25 12:15:30,043 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-25 12:15:30,044 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-25 12:15:30,044 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-25 12:15:30,045 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-25 12:15:30,045 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-25 12:15:30,092 INFO ]: Repository-Root is: /tmp [2018-06-25 12:15:30,109 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-25 12:15:30,113 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-25 12:15:30,114 INFO ]: Initializing SmtParser... [2018-06-25 12:15:30,114 INFO ]: SmtParser initialized [2018-06-25 12:15:30,115 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/cav12/s3_srvr_2_BUG.cil.smt2 [2018-06-25 12:15:30,116 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 12:15:30,200 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/s3_srvr_2_BUG.cil.smt2 unknown [2018-06-25 12:15:30,787 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/s3_srvr_2_BUG.cil.smt2 [2018-06-25 12:15:30,792 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-25 12:15:30,798 INFO ]: Walking toolchain with 4 elements. [2018-06-25 12:15:30,798 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-25 12:15:30,799 INFO ]: Initializing ChcToBoogie... [2018-06-25 12:15:30,808 INFO ]: ChcToBoogie initialized [2018-06-25 12:15:30,811 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 12:15:30" (1/1) ... [2018-06-25 12:15:30,919 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:15:30 Unit [2018-06-25 12:15:30,919 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-25 12:15:30,919 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-25 12:15:30,919 INFO ]: Initializing Boogie Preprocessor... [2018-06-25 12:15:30,919 INFO ]: Boogie Preprocessor initialized [2018-06-25 12:15:30,955 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:15:30" (1/1) ... [2018-06-25 12:15:30,955 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:15:30" (1/1) ... [2018-06-25 12:15:30,981 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:15:30" (1/1) ... [2018-06-25 12:15:30,981 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:15:30" (1/1) ... [2018-06-25 12:15:31,004 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:15:30" (1/1) ... [2018-06-25 12:15:31,005 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:15:30" (1/1) ... [2018-06-25 12:15:31,009 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:15:30" (1/1) ... [2018-06-25 12:15:31,014 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-25 12:15:31,015 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-25 12:15:31,015 INFO ]: Initializing RCFGBuilder... [2018-06-25 12:15:31,015 INFO ]: RCFGBuilder initialized [2018-06-25 12:15:31,016 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:15:30" (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 12:15:31,049 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-25 12:15:31,049 INFO ]: Found specification of procedure gotoProc [2018-06-25 12:15:31,049 INFO ]: Found implementation of procedure gotoProc [2018-06-25 12:15:31,050 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-25 12:15:31,050 INFO ]: Found specification of procedure Ultimate.START [2018-06-25 12:15:31,050 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 12:15:31,481 INFO ]: Using library mode [2018-06-25 12:15:31,484 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 12:15:31 BoogieIcfgContainer [2018-06-25 12:15:31,484 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-25 12:15:31,485 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-25 12:15:31,485 INFO ]: Initializing TraceAbstraction... [2018-06-25 12:15:31,490 INFO ]: TraceAbstraction initialized [2018-06-25 12:15:31,490 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 12:15:30" (1/3) ... [2018-06-25 12:15:31,491 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39036b74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 25.06 12:15:31, skipping insertion in model container [2018-06-25 12:15:31,491 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:15:30" (2/3) ... [2018-06-25 12:15:31,491 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39036b74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.06 12:15:31, skipping insertion in model container [2018-06-25 12:15:31,496 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 12:15:31" (3/3) ... [2018-06-25 12:15:31,498 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-25 12:15:31,507 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-25 12:15:31,515 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-25 12:15:31,555 INFO ]: Using default assertion order modulation [2018-06-25 12:15:31,555 INFO ]: Interprodecural is true [2018-06-25 12:15:31,555 INFO ]: Hoare is false [2018-06-25 12:15:31,555 INFO ]: Compute interpolants for FPandBP [2018-06-25 12:15:31,556 INFO ]: Backedges is TWOTRACK [2018-06-25 12:15:31,556 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-25 12:15:31,556 INFO ]: Difference is false [2018-06-25 12:15:31,556 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-25 12:15:31,556 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-25 12:15:31,569 INFO ]: Start isEmpty. Operand 10 states. [2018-06-25 12:15:31,585 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-25 12:15:31,585 INFO ]: Found error trace [2018-06-25 12:15:31,586 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-25 12:15:31,586 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 12:15:31,591 INFO ]: Analyzing trace with hash 1285054476, now seen corresponding path program 1 times [2018-06-25 12:15:31,592 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 12:15:31,592 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 12:15:31,624 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 12:15:31,624 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 12:15:31,624 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 12:15:31,694 INFO ]: Conjunction of SSA is unsat [2018-06-25 12:15:31,797 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 12:15:31,799 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-25 12:15:31,799 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-25 12:15:31,800 INFO ]: Interpolant automaton has 3 states [2018-06-25 12:15:31,811 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-25 12:15:31,811 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 12:15:31,813 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-25 12:15:31,882 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 12:15:31,882 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-25 12:15:31,884 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-25 12:15:31,885 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-25 12:15:31,886 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 12:15:31,918 INFO ]: With dead ends: 9 [2018-06-25 12:15:31,918 INFO ]: Without dead ends: 9 [2018-06-25 12:15:31,920 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 12:15:31,939 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-25 12:15:31,960 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-25 12:15:31,961 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-25 12:15:31,961 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-25 12:15:31,962 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-25 12:15:31,962 INFO ]: Finished accepts. word is rejected. [2018-06-25 12:15:31,962 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-25 12:15:31,962 INFO ]: Interpolant automaton has 3 states. [2018-06-25 12:15:31,962 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-25 12:15:31,963 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-25 12:15:31,963 INFO ]: Found error trace [2018-06-25 12:15:31,963 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 12:15:31,963 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 12:15:31,964 INFO ]: Analyzing trace with hash 1180100628, now seen corresponding path program 1 times [2018-06-25 12:15:31,964 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 12:15:31,964 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 12:15:31,965 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 12:15:31,965 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 12:15:31,965 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 12:15:32,109 INFO ]: Conjunction of SSA is unsat [2018-06-25 12:15:32,327 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 12:15:32,327 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 12:15:32,327 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 12:15:32,336 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 12:15:32,488 INFO ]: Conjunction of SSA is unsat [2018-06-25 12:15:32,501 INFO ]: Computing forward predicates... [2018-06-25 12:15:33,102 WARN ]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-25 12:15:33,121 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 12:15:33,159 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 12:15:33,159 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-25 12:15:33,159 INFO ]: Interpolant automaton has 5 states [2018-06-25 12:15:33,160 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-25 12:15:33,160 INFO ]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-06-25 12:15:33,160 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-06-25 12:15:33,335 WARN ]: Spent 137.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 5 [2018-06-25 12:15:33,655 WARN ]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-06-25 12:15:33,745 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 12:15:33,745 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-25 12:15:33,745 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-25 12:15:33,745 INFO ]: Start accepts. Automaton has 5 states. Word has length 8 [2018-06-25 12:15:33,745 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 12:15:33,745 INFO ]: With dead ends: 11 [2018-06-25 12:15:33,746 INFO ]: Without dead ends: 11 [2018-06-25 12:15:33,746 INFO ]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-06-25 12:15:33,746 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-25 12:15:33,748 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-25 12:15:33,748 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-25 12:15:33,748 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-25 12:15:33,748 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-06-25 12:15:33,748 INFO ]: Finished accepts. word is rejected. [2018-06-25 12:15:33,748 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-25 12:15:33,748 INFO ]: Interpolant automaton has 5 states. [2018-06-25 12:15:33,748 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-25 12:15:33,749 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-25 12:15:33,749 INFO ]: Found error trace [2018-06-25 12:15:33,751 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 12:15:33,751 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 12:15:33,751 INFO ]: Analyzing trace with hash 145098516, now seen corresponding path program 2 times [2018-06-25 12:15:33,751 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 12:15:33,751 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 12:15:33,752 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 12:15:33,752 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 12:15:33,752 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 12:15:33,979 INFO ]: Conjunction of SSA is unsat [2018-06-25 12:15:34,441 WARN ]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-06-25 12:15:34,616 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 12:15:34,617 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 12:15:34,617 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 12:15:34,632 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 12:15:34,788 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-25 12:15:34,788 INFO ]: Conjunction of SSA is unsat [2018-06-25 12:15:34,799 INFO ]: Computing forward predicates... [2018-06-25 12:15:36,418 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 12:15:36,440 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 12:15:36,440 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-06-25 12:15:36,440 INFO ]: Interpolant automaton has 9 states [2018-06-25 12:15:36,440 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-25 12:15:36,440 INFO ]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2018-06-25 12:15:36,440 INFO ]: Start difference. First operand 11 states and 11 transitions. Second operand 9 states. [2018-06-25 12:15:36,582 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 12:15:36,582 INFO ]: Finished difference Result 12 states and 12 transitions. [2018-06-25 12:15:36,582 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-25 12:15:36,582 INFO ]: Start accepts. Automaton has 9 states. Word has length 10 [2018-06-25 12:15:36,582 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 12:15:36,582 INFO ]: With dead ends: 12 [2018-06-25 12:15:36,582 INFO ]: Without dead ends: 12 [2018-06-25 12:15:36,583 INFO ]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2018-06-25 12:15:36,583 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-25 12:15:36,584 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-06-25 12:15:36,584 INFO ]: Start removeUnreachable. Operand 12 states. [2018-06-25 12:15:36,585 INFO ]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-06-25 12:15:36,585 INFO ]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-06-25 12:15:36,585 INFO ]: Finished accepts. word is rejected. [2018-06-25 12:15:36,585 INFO ]: Abstraction has 12 states and 12 transitions. [2018-06-25 12:15:36,585 INFO ]: Interpolant automaton has 9 states. [2018-06-25 12:15:36,585 INFO ]: Start isEmpty. Operand 12 states and 12 transitions. [2018-06-25 12:15:36,585 INFO ]: Finished isEmpty. Found accepting run of length 12 [2018-06-25 12:15:36,585 INFO ]: Found error trace [2018-06-25 12:15:36,585 INFO ]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 12:15:36,585 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 12:15:36,586 INFO ]: Analyzing trace with hash 201204236, now seen corresponding path program 3 times [2018-06-25 12:15:36,586 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 12:15:36,586 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 12:15:36,586 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 12:15:36,586 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 12:15:36,586 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 12:15:36,736 INFO ]: Conjunction of SSA is unsat [2018-06-25 12:15:37,277 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 12:15:37,277 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 12:15:37,277 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 12:15:37,286 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-25 12:15:37,471 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-25 12:15:37,471 INFO ]: Conjunction of SSA is unsat [2018-06-25 12:15:37,484 INFO ]: Computing forward predicates... [2018-06-25 12:15:40,017 WARN ]: Spent 268.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 14 [2018-06-25 12:15:40,304 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 12:15:40,339 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 12:15:40,339 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2018-06-25 12:15:40,340 INFO ]: Interpolant automaton has 11 states [2018-06-25 12:15:40,340 INFO ]: Constructing interpolant automaton starting with 11 interpolants. [2018-06-25 12:15:40,340 INFO ]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-06-25 12:15:40,340 INFO ]: Start difference. First operand 12 states and 12 transitions. Second operand 11 states. [2018-06-25 12:15:40,806 WARN ]: Spent 385.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 5 [2018-06-25 12:15:41,682 WARN ]: Spent 790.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 10 [2018-06-25 12:15:42,371 WARN ]: Spent 569.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2018-06-25 12:15:42,556 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 12:15:42,556 INFO ]: Finished difference Result 13 states and 13 transitions. [2018-06-25 12:15:42,556 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-25 12:15:42,556 INFO ]: Start accepts. Automaton has 11 states. Word has length 11 [2018-06-25 12:15:42,556 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 12:15:42,557 INFO ]: With dead ends: 13 [2018-06-25 12:15:42,557 INFO ]: Without dead ends: 13 [2018-06-25 12:15:42,557 INFO ]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2018-06-25 12:15:42,557 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-25 12:15:42,559 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-25 12:15:42,559 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-25 12:15:42,559 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-06-25 12:15:42,559 INFO ]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-06-25 12:15:42,559 INFO ]: Finished accepts. word is rejected. [2018-06-25 12:15:42,559 INFO ]: Abstraction has 13 states and 13 transitions. [2018-06-25 12:15:42,559 INFO ]: Interpolant automaton has 11 states. [2018-06-25 12:15:42,559 INFO ]: Start isEmpty. Operand 13 states and 13 transitions. [2018-06-25 12:15:42,562 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-25 12:15:42,562 INFO ]: Found error trace [2018-06-25 12:15:42,562 INFO ]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 12:15:42,562 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 12:15:42,562 INFO ]: Analyzing trace with hash 1940481556, now seen corresponding path program 4 times [2018-06-25 12:15:42,562 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 12:15:42,562 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 12:15:42,563 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 12:15:42,563 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 12:15:42,563 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 12:15:42,818 INFO ]: Conjunction of SSA is unsat [2018-06-25 12:15:43,638 WARN ]: Spent 465.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 3 [2018-06-25 12:15:43,796 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 12:15:43,796 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 12:15:43,796 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 12:15:43,802 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-25 12:15:43,986 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-25 12:15:43,986 INFO ]: Conjunction of SSA is unsat [2018-06-25 12:15:44,002 INFO ]: Computing forward predicates... [2018-06-25 12:15:44,494 WARN ]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-25 12:15:46,165 WARN ]: Spent 600.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 13 [2018-06-25 12:15:54,783 WARN ]: Spent 4.06 s on a formula simplification. DAG size of input: 261 DAG size of output: 113 [2018-06-25 12:16:06,373 WARN ]: Simplifying disjunction of 24610 conjuctions. This might take some time... Received shutdown request... [2018-06-25 12:16:32,368 INFO ]: Timeout while computing interpolants [2018-06-25 12:16:32,568 WARN ]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 12:16:32,569 WARN ]: Verification canceled [2018-06-25 12:16:32,578 WARN ]: Timeout [2018-06-25 12:16:32,579 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.06 12:16:32 BoogieIcfgContainer [2018-06-25 12:16:32,579 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-25 12:16:32,580 INFO ]: Toolchain (without parser) took 61787.26 ms. Allocated memory was 304.1 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 238.7 MB in the beginning and 482.1 MB in the end (delta: -243.4 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-25 12:16:32,580 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 304.1 MB. Free memory is still 269.7 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-25 12:16:32,581 INFO ]: ChcToBoogie took 120.56 ms. Allocated memory is still 304.1 MB. Free memory was 237.7 MB in the beginning and 234.7 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. [2018-06-25 12:16:32,581 INFO ]: Boogie Preprocessor took 94.90 ms. Allocated memory is still 304.1 MB. Free memory was 234.7 MB in the beginning and 232.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-25 12:16:32,581 INFO ]: RCFGBuilder took 469.31 ms. Allocated memory is still 304.1 MB. Free memory was 232.7 MB in the beginning and 200.7 MB in the end (delta: 32.0 MB). Peak memory consumption was 32.0 MB. Max. memory is 3.6 GB. [2018-06-25 12:16:32,582 INFO ]: TraceAbstraction took 61093.43 ms. Allocated memory was 304.1 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 200.7 MB in the beginning and 482.1 MB in the end (delta: -281.4 MB). Peak memory consumption was 1.2 GB. Max. memory is 3.6 GB. [2018-06-25 12:16:32,584 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 304.1 MB. Free memory is still 269.7 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 120.56 ms. Allocated memory is still 304.1 MB. Free memory was 237.7 MB in the beginning and 234.7 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 94.90 ms. Allocated memory is still 304.1 MB. Free memory was 234.7 MB in the beginning and 232.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 469.31 ms. Allocated memory is still 304.1 MB. Free memory was 232.7 MB in the beginning and 200.7 MB in the end (delta: 32.0 MB). Peak memory consumption was 32.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 61093.43 ms. Allocated memory was 304.1 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 200.7 MB in the beginning and 482.1 MB in the end (delta: -281.4 MB). Peak memory consumption was 1.2 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 PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations, while DnfTransformerHelper was XNF transformer was simplifying 24610 conjuctions. . - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. TIMEOUT Result, 61.0s OverallTime, 5 OverallIterations, 5 TraceHistogramMax, 3.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 28 SDtfs, 4 SDslu, 69 SDs, 0 SdLazy, 31 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 4.3s 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: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 6.5s InterpolantComputationTime, 65 NumberOfCodeBlocks, 65 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 58 ConstructedInterpolants, 0 QuantifiedInterpolants, 1970 SizeOfPredicates, 6 NumberOfNonLiveVariables, 1305 ConjunctsInSsa, 49 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/s3_srvr_2_BUG.cil.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-25_12-16-32-594.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/s3_srvr_2_BUG.cil.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-25_12-16-32-594.csv Completed graceful shutdown