java -Xss1g -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_No_Goto.epf -i /storage/chc-comp/vmt-chc-benchmarks/cav12/s3_clnt_1.cil.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 14:12:19,099 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 14:12:19,101 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 14:12:19,115 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 14:12:19,115 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 14:12:19,116 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 14:12:19,117 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 14:12:19,120 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 14:12:19,122 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 14:12:19,122 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 14:12:19,124 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 14:12:19,125 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 14:12:19,125 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 14:12:19,126 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 14:12:19,130 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 14:12:19,131 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 14:12:19,132 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 14:12:19,141 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 14:12:19,143 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 14:12:19,143 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 14:12:19,144 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 14:12:19,149 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 14:12:19,149 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 14:12:19,150 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 14:12:19,150 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 14:12:19,154 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 14:12:19,155 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 14:12:19,156 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 14:12:19,157 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 14:12:19,157 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 14:12:19,157 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 14:12:19,161 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 14:12:19,161 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 14:12:19,162 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 14:12:19,163 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 14:12:19,163 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_No_Goto.epf [2018-06-22 14:12:19,182 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 14:12:19,182 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 14:12:19,183 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 14:12:19,183 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 14:12:19,184 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 14:12:19,184 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 14:12:19,184 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 14:12:19,184 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 14:12:19,185 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 14:12:19,185 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 14:12:19,185 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 14:12:19,185 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 14:12:19,185 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 14:12:19,186 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 14:12:19,186 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 14:12:19,186 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 14:12:19,186 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 14:12:19,186 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 14:12:19,187 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 14:12:19,189 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 14:12:19,189 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 14:12:19,236 INFO ]: Repository-Root is: /tmp [2018-06-22 14:12:19,253 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 14:12:19,259 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 14:12:19,260 INFO ]: Initializing SmtParser... [2018-06-22 14:12:19,260 INFO ]: SmtParser initialized [2018-06-22 14:12:19,261 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/cav12/s3_clnt_1.cil.smt2 [2018-06-22 14:12:19,263 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 [2018-06-22 14:12:19,356 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/s3_clnt_1.cil.smt2 unknown [2018-06-22 14:12:19,906 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/s3_clnt_1.cil.smt2 [2018-06-22 14:12:19,911 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 14:12:19,917 INFO ]: Walking toolchain with 4 elements. [2018-06-22 14:12:19,917 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 14:12:19,917 INFO ]: Initializing ChcToBoogie... [2018-06-22 14:12:19,917 INFO ]: ChcToBoogie initialized [2018-06-22 14:12:19,920 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:12:19" (1/1) ... [2018-06-22 14:12:19,971 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:12:19 Unit [2018-06-22 14:12:19,971 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 14:12:19,971 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 14:12:19,971 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 14:12:19,971 INFO ]: Boogie Preprocessor initialized [2018-06-22 14:12:19,992 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:12:19" (1/1) ... [2018-06-22 14:12:19,992 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:12:19" (1/1) ... [2018-06-22 14:12:20,003 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:12:19" (1/1) ... [2018-06-22 14:12:20,003 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:12:19" (1/1) ... [2018-06-22 14:12:20,016 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:12:19" (1/1) ... [2018-06-22 14:12:20,018 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:12:19" (1/1) ... [2018-06-22 14:12:20,021 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:12:19" (1/1) ... [2018-06-22 14:12:20,026 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 14:12:20,026 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 14:12:20,026 INFO ]: Initializing RCFGBuilder... [2018-06-22 14:12:20,026 INFO ]: RCFGBuilder initialized [2018-06-22 14:12:20,027 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:12:19" (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) [2018-06-22 14:12:20,036 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 14:12:20,036 INFO ]: Found specification of procedure False [2018-06-22 14:12:20,036 INFO ]: Found implementation of procedure False [2018-06-22 14:12:20,036 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 14:12:20,036 INFO ]: Found specification of procedure state [2018-06-22 14:12:20,036 INFO ]: Found implementation of procedure state [2018-06-22 14:12:20,036 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 14:12:20,036 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 14:12:20,037 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 [2018-06-22 14:12:20,393 INFO ]: Using library mode [2018-06-22 14:12:20,393 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:12:20 BoogieIcfgContainer [2018-06-22 14:12:20,393 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 14:12:20,395 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 14:12:20,395 INFO ]: Initializing TraceAbstraction... [2018-06-22 14:12:20,400 INFO ]: TraceAbstraction initialized [2018-06-22 14:12:20,401 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:12:19" (1/3) ... [2018-06-22 14:12:20,401 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a74b84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 02:12:20, skipping insertion in model container [2018-06-22 14:12:20,402 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:12:19" (2/3) ... [2018-06-22 14:12:20,402 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a74b84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 02:12:20, skipping insertion in model container [2018-06-22 14:12:20,402 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:12:20" (3/3) ... [2018-06-22 14:12:20,404 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 14:12:20,413 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 14:12:20,423 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 14:12:20,475 INFO ]: Using default assertion order modulation [2018-06-22 14:12:20,476 INFO ]: Interprodecural is true [2018-06-22 14:12:20,476 INFO ]: Hoare is false [2018-06-22 14:12:20,476 INFO ]: Compute interpolants for FPandBP [2018-06-22 14:12:20,476 INFO ]: Backedges is TWOTRACK [2018-06-22 14:12:20,476 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 14:12:20,476 INFO ]: Difference is false [2018-06-22 14:12:20,476 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 14:12:20,476 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 14:12:20,494 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 14:12:20,507 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 14:12:20,507 INFO ]: Found error trace [2018-06-22 14:12:20,508 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:12:20,508 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:12:20,514 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-22 14:12:20,516 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:12:20,517 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:12:20,566 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:12:20,566 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:12:20,567 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:12:20,614 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:12:20,735 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 14:12:20,737 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 14:12:20,737 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 14:12:20,739 INFO ]: Interpolant automaton has 4 states [2018-06-22 14:12:20,750 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 14:12:20,750 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 14:12:20,752 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 14:12:20,878 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:12:20,878 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 14:12:20,885 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 14:12:20,887 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 14:12:20,887 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:12:20,907 INFO ]: With dead ends: 13 [2018-06-22 14:12:20,907 INFO ]: Without dead ends: 13 [2018-06-22 14:12:20,909 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 14:12:20,939 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 14:12:20,958 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 14:12:20,959 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 14:12:20,960 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 14:12:20,961 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 14:12:20,961 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:12:20,961 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 14:12:20,961 INFO ]: Interpolant automaton has 4 states. [2018-06-22 14:12:20,962 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 14:12:20,963 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 14:12:20,963 INFO ]: Found error trace [2018-06-22 14:12:20,963 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:12:20,963 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:12:20,964 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-22 14:12:20,964 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:12:20,964 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:12:20,965 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:12:20,965 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:12:20,965 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:12:21,072 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:12:21,441 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:12:21,441 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:12:21,441 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 [2018-06-22 14:12:21,448 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:12:21,522 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:12:21,533 INFO ]: Computing forward predicates... [2018-06-22 14:12:22,428 WARN ]: Spent 140.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2018-06-22 14:12:22,558 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:12:22,581 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:12:22,581 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-06-22 14:12:22,582 INFO ]: Interpolant automaton has 9 states [2018-06-22 14:12:22,582 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 14:12:22,582 INFO ]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-06-22 14:12:22,582 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 9 states. [2018-06-22 14:12:23,108 WARN ]: Spent 163.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 11 [2018-06-22 14:12:23,331 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:12:23,331 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 14:12:23,358 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 14:12:23,358 INFO ]: Start accepts. Automaton has 9 states. Word has length 13 [2018-06-22 14:12:23,358 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:12:23,359 INFO ]: With dead ends: 15 [2018-06-22 14:12:23,359 INFO ]: Without dead ends: 15 [2018-06-22 14:12:23,360 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2018-06-22 14:12:23,360 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 14:12:23,362 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 14:12:23,362 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 14:12:23,363 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 14:12:23,363 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 14:12:23,363 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:12:23,363 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 14:12:23,363 INFO ]: Interpolant automaton has 9 states. [2018-06-22 14:12:23,363 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 14:12:23,364 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 14:12:23,364 INFO ]: Found error trace [2018-06-22 14:12:23,364 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:12:23,364 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:12:23,364 INFO ]: Analyzing trace with hash -1486246934, now seen corresponding path program 2 times [2018-06-22 14:12:23,364 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:12:23,364 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:12:23,365 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:12:23,365 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:12:23,365 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:12:23,482 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:12:23,739 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 14:12:23,739 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:12:23,739 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 [2018-06-22 14:12:23,748 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 14:12:23,836 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 14:12:23,837 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:12:23,847 INFO ]: Computing forward predicates... [2018-06-22 14:12:24,979 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 14:12:25,007 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:12:25,007 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2018-06-22 14:12:25,007 INFO ]: Interpolant automaton has 13 states [2018-06-22 14:12:25,007 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-22 14:12:25,007 INFO ]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2018-06-22 14:12:25,008 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 13 states. [2018-06-22 14:12:25,315 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:12:25,315 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 14:12:25,316 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 14:12:25,316 INFO ]: Start accepts. Automaton has 13 states. Word has length 17 [2018-06-22 14:12:25,316 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:12:25,317 INFO ]: With dead ends: 17 [2018-06-22 14:12:25,317 INFO ]: Without dead ends: 17 [2018-06-22 14:12:25,317 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2018-06-22 14:12:25,317 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 14:12:25,320 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 14:12:25,320 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 14:12:25,320 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 14:12:25,320 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 14:12:25,321 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:12:25,321 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 14:12:25,321 INFO ]: Interpolant automaton has 13 states. [2018-06-22 14:12:25,321 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 14:12:25,321 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 14:12:25,321 INFO ]: Found error trace [2018-06-22 14:12:25,321 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:12:25,321 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:12:25,321 INFO ]: Analyzing trace with hash -2056434034, now seen corresponding path program 3 times [2018-06-22 14:12:25,321 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:12:25,321 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:12:25,322 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:12:25,322 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:12:25,322 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:12:25,432 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:12:26,051 WARN ]: Spent 301.00 ms on a formula simplification. DAG size of input: 7 DAG size of output: 5 [2018-06-22 14:12:26,278 WARN ]: Spent 154.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 11 [2018-06-22 14:12:26,327 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 14:12:26,327 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:12:26,327 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 [2018-06-22 14:12:26,335 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 14:12:26,430 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 14:12:26,430 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:12:26,440 INFO ]: Computing forward predicates... [2018-06-22 14:12:28,019 WARN ]: Spent 939.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 15 [2018-06-22 14:12:29,355 WARN ]: Spent 636.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2018-06-22 14:12:30,039 INFO ]: Checked inductivity of 21 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 14:12:30,072 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:12:30,072 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2018-06-22 14:12:30,072 INFO ]: Interpolant automaton has 17 states [2018-06-22 14:12:30,072 INFO ]: Constructing interpolant automaton starting with 17 interpolants. [2018-06-22 14:12:30,072 INFO ]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2018-06-22 14:12:30,072 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 17 states. [2018-06-22 14:12:30,273 WARN ]: Spent 167.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2018-06-22 14:12:30,429 WARN ]: Spent 121.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 19 [2018-06-22 14:12:30,572 WARN ]: Spent 109.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 26 [2018-06-22 14:12:30,769 WARN ]: Spent 179.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2018-06-22 14:12:30,930 WARN ]: Spent 140.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2018-06-22 14:12:30,956 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:12:30,956 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-22 14:12:30,956 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 14:12:30,956 INFO ]: Start accepts. Automaton has 17 states. Word has length 21 [2018-06-22 14:12:30,957 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:12:30,957 INFO ]: With dead ends: 21 [2018-06-22 14:12:30,957 INFO ]: Without dead ends: 21 [2018-06-22 14:12:30,958 INFO ]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2018-06-22 14:12:30,958 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-22 14:12:30,960 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-22 14:12:30,960 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-22 14:12:30,960 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-22 14:12:30,960 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 21 [2018-06-22 14:12:30,960 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:12:30,961 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-22 14:12:30,961 INFO ]: Interpolant automaton has 17 states. [2018-06-22 14:12:30,961 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-22 14:12:30,961 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 14:12:30,961 INFO ]: Found error trace [2018-06-22 14:12:30,961 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:12:30,962 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:12:30,962 INFO ]: Analyzing trace with hash 1986427350, now seen corresponding path program 4 times [2018-06-22 14:12:30,962 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:12:30,962 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:12:30,962 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:12:30,962 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:12:30,962 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:12:31,151 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:12:31,868 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 14:12:31,868 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:12:31,868 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 [2018-06-22 14:12:31,874 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 14:12:31,998 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 14:12:31,998 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:12:32,012 INFO ]: Computing forward predicates... [2018-06-22 14:12:33,494 WARN ]: Spent 132.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2018-06-22 14:12:34,341 INFO ]: Checked inductivity of 55 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 14:12:34,362 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:12:34,362 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2018-06-22 14:12:34,363 INFO ]: Interpolant automaton has 25 states [2018-06-22 14:12:34,363 INFO ]: Constructing interpolant automaton starting with 25 interpolants. [2018-06-22 14:12:34,363 INFO ]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2018-06-22 14:12:34,363 INFO ]: Start difference. First operand 21 states and 22 transitions. Second operand 25 states. [2018-06-22 14:12:34,754 WARN ]: Spent 349.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 86 [2018-06-22 14:12:35,271 WARN ]: Spent 270.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 49 [2018-06-22 14:12:35,434 WARN ]: Spent 134.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 59 [2018-06-22 14:12:35,744 WARN ]: Spent 259.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 68 [2018-06-22 14:12:35,986 WARN ]: Spent 169.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 79 [2018-06-22 14:12:36,025 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:12:36,025 INFO ]: Finished difference Result 25 states and 26 transitions. [2018-06-22 14:12:36,028 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-22 14:12:36,028 INFO ]: Start accepts. Automaton has 25 states. Word has length 29 [2018-06-22 14:12:36,029 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:12:36,029 INFO ]: With dead ends: 25 [2018-06-22 14:12:36,029 INFO ]: Without dead ends: 25 [2018-06-22 14:12:36,030 INFO ]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=238, Invalid=818, Unknown=0, NotChecked=0, Total=1056 [2018-06-22 14:12:36,030 INFO ]: Start minimizeSevpa. Operand 25 states. [2018-06-22 14:12:36,036 INFO ]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-06-22 14:12:36,036 INFO ]: Start removeUnreachable. Operand 25 states. [2018-06-22 14:12:36,037 INFO ]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-06-22 14:12:36,037 INFO ]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 29 [2018-06-22 14:12:36,037 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:12:36,037 INFO ]: Abstraction has 25 states and 26 transitions. [2018-06-22 14:12:36,037 INFO ]: Interpolant automaton has 25 states. [2018-06-22 14:12:36,037 INFO ]: Start isEmpty. Operand 25 states and 26 transitions. [2018-06-22 14:12:36,038 INFO ]: Finished isEmpty. Found accepting run of length 38 [2018-06-22 14:12:36,038 INFO ]: Found error trace [2018-06-22 14:12:36,038 INFO ]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:12:36,038 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:12:36,039 INFO ]: Analyzing trace with hash -411423458, now seen corresponding path program 5 times [2018-06-22 14:12:36,039 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:12:36,039 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:12:36,042 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:12:36,042 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:12:36,042 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:12:36,270 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:12:36,919 WARN ]: Spent 116.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 18 [2018-06-22 14:12:37,570 WARN ]: Spent 145.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 8 [2018-06-22 14:12:37,602 INFO ]: Checked inductivity of 105 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-22 14:12:37,602 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:12:37,602 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:12:37,608 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 14:12:37,873 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-06-22 14:12:37,873 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:12:37,894 INFO ]: Computing forward predicates... [2018-06-22 14:12:41,014 WARN ]: Spent 1.89 s on a formula simplification. DAG size of input: 356 DAG size of output: 138 [2018-06-22 14:12:42,328 WARN ]: Spent 972.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 70 [2018-06-22 14:12:42,619 WARN ]: Spent 118.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2018-06-22 14:12:42,883 WARN ]: Spent 113.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2018-06-22 14:12:43,576 INFO ]: Checked inductivity of 105 backedges. 6 proven. 71 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-22 14:12:43,607 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:12:43,607 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2018-06-22 14:12:43,608 INFO ]: Interpolant automaton has 33 states [2018-06-22 14:12:43,608 INFO ]: Constructing interpolant automaton starting with 33 interpolants. [2018-06-22 14:12:43,608 INFO ]: CoverageRelationStatistics Valid=136, Invalid=920, Unknown=0, NotChecked=0, Total=1056 [2018-06-22 14:12:43,608 INFO ]: Start difference. First operand 25 states and 26 transitions. Second operand 33 states. [2018-06-22 14:12:44,442 WARN ]: Spent 757.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 177 [2018-06-22 14:12:44,858 WARN ]: Spent 353.00 ms on a formula simplification. DAG size of input: 199 DAG size of output: 110 [2018-06-22 14:12:45,157 WARN ]: Spent 267.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 110 [2018-06-22 14:12:45,443 WARN ]: Spent 253.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 112 [2018-06-22 14:12:46,069 WARN ]: Spent 512.00 ms on a formula simplification. DAG size of input: 199 DAG size of output: 141 [2018-06-22 14:12:46,688 WARN ]: Spent 568.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 150 [2018-06-22 14:12:47,358 WARN ]: Spent 616.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 156 [2018-06-22 14:12:48,086 WARN ]: Spent 663.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 164 [2018-06-22 14:12:48,880 WARN ]: Spent 723.00 ms on a formula simplification. DAG size of input: 199 DAG size of output: 171 [2018-06-22 14:12:48,932 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:12:48,932 INFO ]: Finished difference Result 29 states and 30 transitions. [2018-06-22 14:12:48,932 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-06-22 14:12:48,932 INFO ]: Start accepts. Automaton has 33 states. Word has length 37 [2018-06-22 14:12:48,933 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:12:48,933 INFO ]: With dead ends: 29 [2018-06-22 14:12:48,933 INFO ]: Without dead ends: 29 [2018-06-22 14:12:48,934 INFO ]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=380, Invalid=1426, Unknown=0, NotChecked=0, Total=1806 [2018-06-22 14:12:48,934 INFO ]: Start minimizeSevpa. Operand 29 states. [2018-06-22 14:12:48,938 INFO ]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-06-22 14:12:48,938 INFO ]: Start removeUnreachable. Operand 29 states. [2018-06-22 14:12:48,939 INFO ]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-06-22 14:12:48,939 INFO ]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 37 [2018-06-22 14:12:48,939 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:12:48,939 INFO ]: Abstraction has 29 states and 30 transitions. [2018-06-22 14:12:48,939 INFO ]: Interpolant automaton has 33 states. [2018-06-22 14:12:48,939 INFO ]: Start isEmpty. Operand 29 states and 30 transitions. [2018-06-22 14:12:48,940 INFO ]: Finished isEmpty. Found accepting run of length 46 [2018-06-22 14:12:48,941 INFO ]: Found error trace [2018-06-22 14:12:48,941 INFO ]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:12:48,941 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:12:48,941 INFO ]: Analyzing trace with hash 1442343014, now seen corresponding path program 6 times [2018-06-22 14:12:48,941 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:12:48,941 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:12:48,941 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:12:48,942 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:12:48,942 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:12:49,373 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:12:51,107 WARN ]: Spent 560.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 16 [2018-06-22 14:12:53,216 WARN ]: Spent 2.04 s on a formula simplification. DAG size of input: 534 DAG size of output: 137 [2018-06-22 14:12:56,402 WARN ]: Spent 3.11 s on a formula simplification. DAG size of input: 483 DAG size of output: 231 [2018-06-22 14:12:57,452 WARN ]: Spent 845.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 104 [2018-06-22 14:12:57,788 WARN ]: Spent 308.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 61 [2018-06-22 14:12:58,432 WARN ]: Spent 214.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 44 [2018-06-22 14:12:58,867 WARN ]: Spent 357.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 48 [2018-06-22 14:12:59,679 WARN ]: Spent 718.00 ms on a formula simplification. DAG size of input: 259 DAG size of output: 65 [2018-06-22 14:13:00,105 WARN ]: Spent 332.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 20 [2018-06-22 14:13:00,171 INFO ]: Checked inductivity of 171 backedges. 2 proven. 124 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-06-22 14:13:00,171 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:13:00,171 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:13:00,177 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 14:13:00,445 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-06-22 14:13:00,445 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:13:00,465 INFO ]: Computing forward predicates... [2018-06-22 14:13:01,883 WARN ]: Spent 1.15 s on a formula simplification. DAG size of input: 225 DAG size of output: 80 [2018-06-22 14:13:04,870 WARN ]: Spent 2.53 s on a formula simplification. DAG size of input: 383 DAG size of output: 139 [2018-06-22 14:13:05,810 WARN ]: Spent 649.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 74 [2018-06-22 14:13:06,123 WARN ]: Spent 130.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2018-06-22 14:13:08,407 WARN ]: Spent 1.88 s on a formula simplification. DAG size of input: 392 DAG size of output: 144 [2018-06-22 14:13:11,535 WARN ]: Spent 2.67 s on a formula simplification. DAG size of input: 422 DAG size of output: 200 [2018-06-22 14:13:14,550 WARN ]: Spent 2.61 s on a formula simplification. DAG size of input: 418 DAG size of output: 196 [2018-06-22 14:13:17,628 WARN ]: Spent 2.58 s on a formula simplification. DAG size of input: 412 DAG size of output: 195 [2018-06-22 14:13:17,911 WARN ]: Spent 127.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 31 [2018-06-22 14:13:18,581 INFO ]: Checked inductivity of 171 backedges. 9 proven. 117 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-06-22 14:13:18,603 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:13:18,603 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 41 [2018-06-22 14:13:18,604 INFO ]: Interpolant automaton has 41 states [2018-06-22 14:13:18,604 INFO ]: Constructing interpolant automaton starting with 41 interpolants. [2018-06-22 14:13:18,604 INFO ]: CoverageRelationStatistics Valid=215, Invalid=1425, Unknown=0, NotChecked=0, Total=1640 [2018-06-22 14:13:18,605 INFO ]: Start difference. First operand 29 states and 30 transitions. Second operand 41 states. Received shutdown request... [2018-06-22 14:13:20,763 WARN ]: Removed 17 from assertion stack [2018-06-22 14:13:20,763 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 14:13:20,763 WARN ]: Verification canceled [2018-06-22 14:13:20,768 WARN ]: Timeout [2018-06-22 14:13:20,768 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 02:13:20 BoogieIcfgContainer [2018-06-22 14:13:20,768 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 14:13:20,771 INFO ]: Toolchain (without parser) took 60857.58 ms. Allocated memory was 306.2 MB in the beginning and 1.2 GB in the end (delta: 900.7 MB). Free memory was 244.6 MB in the beginning and 695.1 MB in the end (delta: -450.4 MB). Peak memory consumption was 912.7 MB. Max. memory is 3.6 GB. [2018-06-22 14:13:20,772 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 306.2 MB. Free memory is still 271.7 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 14:13:20,772 INFO ]: ChcToBoogie took 53.81 ms. Allocated memory is still 306.2 MB. Free memory was 244.6 MB in the beginning and 242.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 14:13:20,772 INFO ]: Boogie Preprocessor took 54.50 ms. Allocated memory is still 306.2 MB. Free memory was 242.6 MB in the beginning and 240.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 14:13:20,772 INFO ]: RCFGBuilder took 366.90 ms. Allocated memory is still 306.2 MB. Free memory was 239.6 MB in the beginning and 216.4 MB in the end (delta: 23.2 MB). Peak memory consumption was 23.2 MB. Max. memory is 3.6 GB. [2018-06-22 14:13:20,773 INFO ]: TraceAbstraction took 60373.01 ms. Allocated memory was 306.2 MB in the beginning and 1.2 GB in the end (delta: 900.7 MB). Free memory was 216.4 MB in the beginning and 695.1 MB in the end (delta: -478.6 MB). Peak memory consumption was 884.4 MB. Max. memory is 3.6 GB. [2018-06-22 14:13:20,787 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 306.2 MB. Free memory is still 271.7 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 53.81 ms. Allocated memory is still 306.2 MB. Free memory was 244.6 MB in the beginning and 242.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 54.50 ms. Allocated memory is still 306.2 MB. Free memory was 242.6 MB in the beginning and 240.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 366.90 ms. Allocated memory is still 306.2 MB. Free memory was 239.6 MB in the beginning and 216.4 MB in the end (delta: 23.2 MB). Peak memory consumption was 23.2 MB. Max. memory is 3.6 GB. * TraceAbstraction took 60373.01 ms. Allocated memory was 306.2 MB in the beginning and 1.2 GB in the end (delta: 900.7 MB). Free memory was 216.4 MB in the beginning and 695.1 MB in the end (delta: -478.6 MB). Peak memory consumption was 884.4 MB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [UNKNOWN] : Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 0). Cancelled while BasicCegarLoop was constructing difference of abstraction (29states) and interpolant automaton (currently 3 states, 41 states before enhancement), while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 464. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 60.3s OverallTime, 7 OverallIterations, 10 TraceHistogramMax, 11.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 73 SDtfs, 158 SDslu, 464 SDs, 0 SdLazy, 353 SolverSat, 206 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 271 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 45.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=6, 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, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 1.8s SatisfiabilityAnalysisTime, 46.4s InterpolantComputationTime, 333 NumberOfCodeBlocks, 333 NumberOfCodeBlocksAsserted, 34 NumberOfCheckSat, 320 ConstructedInterpolants, 0 QuantifiedInterpolants, 344376 SizeOfPredicates, 3243 NumberOfNonLiveVariables, 2652 ConjunctsInSsa, 191 ConjunctsInUnsatCore, 13 InterpolantComputations, 1 PerfectInterpolantSequences, 218/730 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_clnt_1.cil.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_14-13-20-802.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/s3_clnt_1.cil.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_14-13-20-802.csv Completed graceful shutdown