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/lustre/metros_4_e1_821_e5_911.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 19:19:36,188 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 19:19:36,190 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 19:19:36,202 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 19:19:36,202 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 19:19:36,203 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 19:19:36,204 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 19:19:36,208 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 19:19:36,209 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 19:19:36,211 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 19:19:36,212 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 19:19:36,212 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 19:19:36,213 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 19:19:36,217 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 19:19:36,218 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 19:19:36,218 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 19:19:36,230 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 19:19:36,232 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 19:19:36,233 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 19:19:36,234 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 19:19:36,235 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 19:19:36,237 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 19:19:36,237 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 19:19:36,240 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 19:19:36,241 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 19:19:36,242 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 19:19:36,243 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 19:19:36,243 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 19:19:36,244 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 19:19:36,244 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 19:19:36,245 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 19:19:36,246 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 19:19:36,247 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 19:19:36,247 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 19:19:36,248 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 19:19:36,248 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 19:19:36,260 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 19:19:36,261 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 19:19:36,261 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 19:19:36,261 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 19:19:36,262 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 19:19:36,262 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 19:19:36,262 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 19:19:36,263 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 19:19:36,263 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 19:19:36,263 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 19:19:36,263 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 19:19:36,263 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 19:19:36,264 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 19:19:36,264 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 19:19:36,264 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 19:19:36,264 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 19:19:36,264 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 19:19:36,264 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 19:19:36,265 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 19:19:36,266 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 19:19:36,267 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 19:19:36,316 INFO ]: Repository-Root is: /tmp [2018-06-22 19:19:36,331 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 19:19:36,337 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 19:19:36,338 INFO ]: Initializing SmtParser... [2018-06-22 19:19:36,339 INFO ]: SmtParser initialized [2018-06-22 19:19:36,339 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_4_e1_821_e5_911.smt2 [2018-06-22 19:19:36,340 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 19:19:36,424 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_4_e1_821_e5_911.smt2 unknown [2018-06-22 19:19:36,868 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_4_e1_821_e5_911.smt2 [2018-06-22 19:19:36,873 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 19:19:36,879 INFO ]: Walking toolchain with 4 elements. [2018-06-22 19:19:36,879 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 19:19:36,879 INFO ]: Initializing ChcToBoogie... [2018-06-22 19:19:36,880 INFO ]: ChcToBoogie initialized [2018-06-22 19:19:36,883 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 07:19:36" (1/1) ... [2018-06-22 19:19:36,933 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:19:36 Unit [2018-06-22 19:19:36,933 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 19:19:36,934 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 19:19:36,934 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 19:19:36,934 INFO ]: Boogie Preprocessor initialized [2018-06-22 19:19:36,959 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:19:36" (1/1) ... [2018-06-22 19:19:36,959 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:19:36" (1/1) ... [2018-06-22 19:19:36,974 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:19:36" (1/1) ... [2018-06-22 19:19:36,975 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:19:36" (1/1) ... [2018-06-22 19:19:36,981 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:19:36" (1/1) ... [2018-06-22 19:19:36,983 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:19:36" (1/1) ... [2018-06-22 19:19:36,985 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:19:36" (1/1) ... [2018-06-22 19:19:36,988 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 19:19:36,989 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 19:19:36,989 INFO ]: Initializing RCFGBuilder... [2018-06-22 19:19:36,989 INFO ]: RCFGBuilder initialized [2018-06-22 19:19:36,990 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:19:36" (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 19:19:37,003 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 19:19:37,003 INFO ]: Found specification of procedure False [2018-06-22 19:19:37,003 INFO ]: Found implementation of procedure False [2018-06-22 19:19:37,003 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 19:19:37,003 INFO ]: Found specification of procedure state [2018-06-22 19:19:37,003 INFO ]: Found implementation of procedure state [2018-06-22 19:19:37,003 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 19:19:37,003 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 19:19:37,003 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 19:19:37,368 INFO ]: Using library mode [2018-06-22 19:19:37,369 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 07:19:37 BoogieIcfgContainer [2018-06-22 19:19:37,369 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 19:19:37,371 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 19:19:37,371 INFO ]: Initializing TraceAbstraction... [2018-06-22 19:19:37,374 INFO ]: TraceAbstraction initialized [2018-06-22 19:19:37,374 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 07:19:36" (1/3) ... [2018-06-22 19:19:37,375 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c49b240 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 07:19:37, skipping insertion in model container [2018-06-22 19:19:37,375 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:19:36" (2/3) ... [2018-06-22 19:19:37,375 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c49b240 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 07:19:37, skipping insertion in model container [2018-06-22 19:19:37,375 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 07:19:37" (3/3) ... [2018-06-22 19:19:37,377 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 19:19:37,387 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 19:19:37,395 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 19:19:37,434 INFO ]: Using default assertion order modulation [2018-06-22 19:19:37,434 INFO ]: Interprodecural is true [2018-06-22 19:19:37,434 INFO ]: Hoare is false [2018-06-22 19:19:37,434 INFO ]: Compute interpolants for FPandBP [2018-06-22 19:19:37,434 INFO ]: Backedges is TWOTRACK [2018-06-22 19:19:37,434 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 19:19:37,434 INFO ]: Difference is false [2018-06-22 19:19:37,434 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 19:19:37,434 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 19:19:37,448 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 19:19:37,460 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 19:19:37,460 INFO ]: Found error trace [2018-06-22 19:19:37,463 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:19:37,463 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:19:37,469 INFO ]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times [2018-06-22 19:19:37,471 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:19:37,471 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:19:37,506 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:19:37,506 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:19:37,506 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:19:37,609 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:19:37,751 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 19:19:37,753 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 19:19:37,753 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 19:19:37,754 INFO ]: Interpolant automaton has 4 states [2018-06-22 19:19:37,764 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 19:19:37,764 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 19:19:37,766 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 19:19:37,916 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:19:37,916 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 19:19:37,916 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 19:19:37,918 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 19:19:37,918 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:19:37,929 INFO ]: With dead ends: 13 [2018-06-22 19:19:37,929 INFO ]: Without dead ends: 13 [2018-06-22 19:19:37,933 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 19:19:37,961 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 19:19:37,988 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 19:19:37,989 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 19:19:37,990 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 19:19:37,991 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 19:19:37,991 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:19:37,991 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 19:19:37,991 INFO ]: Interpolant automaton has 4 states. [2018-06-22 19:19:37,991 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 19:19:37,997 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 19:19:37,997 INFO ]: Found error trace [2018-06-22 19:19:37,997 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:19:37,998 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:19:37,998 INFO ]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times [2018-06-22 19:19:37,998 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:19:37,998 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:19:37,999 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:19:37,999 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:19:37,999 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:19:38,120 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:19:38,434 WARN ]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-06-22 19:19:38,576 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 19:19:38,576 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:19:38,576 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 19:19:38,585 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:19:38,743 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:19:38,752 INFO ]: Computing forward predicates... [2018-06-22 19:19:39,138 WARN ]: Spent 183.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 7 [2018-06-22 19:19:39,221 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 19:19:39,244 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:19:39,244 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-06-22 19:19:39,245 INFO ]: Interpolant automaton has 9 states [2018-06-22 19:19:39,245 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 19:19:39,245 INFO ]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-06-22 19:19:39,245 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 9 states. [2018-06-22 19:19:39,785 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:19:39,785 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 19:19:39,786 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 19:19:39,786 INFO ]: Start accepts. Automaton has 9 states. Word has length 13 [2018-06-22 19:19:39,787 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:19:39,787 INFO ]: With dead ends: 15 [2018-06-22 19:19:39,787 INFO ]: Without dead ends: 15 [2018-06-22 19:19:39,788 INFO ]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2018-06-22 19:19:39,788 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 19:19:39,790 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 19:19:39,790 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 19:19:39,792 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 19:19:39,792 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 19:19:39,793 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:19:39,793 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 19:19:39,793 INFO ]: Interpolant automaton has 9 states. [2018-06-22 19:19:39,793 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 19:19:39,793 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 19:19:39,793 INFO ]: Found error trace [2018-06-22 19:19:39,793 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:19:39,793 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:19:39,794 INFO ]: Analyzing trace with hash -1649658231, now seen corresponding path program 2 times [2018-06-22 19:19:39,794 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:19:39,794 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:19:39,794 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:19:39,794 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:19:39,794 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:19:39,923 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:19:40,308 WARN ]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-06-22 19:19:40,512 WARN ]: Spent 123.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 18 [2018-06-22 19:19:40,860 WARN ]: Spent 261.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 14 [2018-06-22 19:19:40,871 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 19:19:40,871 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:19:40,871 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 19:19:40,880 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 19:19:41,009 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 19:19:41,009 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:19:41,015 INFO ]: Computing forward predicates... [2018-06-22 19:19:41,322 WARN ]: Spent 130.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 7 [2018-06-22 19:19:41,565 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 19:19:41,601 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:19:41,602 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2018-06-22 19:19:41,602 INFO ]: Interpolant automaton has 13 states [2018-06-22 19:19:41,602 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-22 19:19:41,602 INFO ]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2018-06-22 19:19:41,602 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 13 states. [2018-06-22 19:19:41,911 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:19:41,911 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 19:19:41,912 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 19:19:41,912 INFO ]: Start accepts. Automaton has 13 states. Word has length 17 [2018-06-22 19:19:41,912 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:19:41,913 INFO ]: With dead ends: 17 [2018-06-22 19:19:41,913 INFO ]: Without dead ends: 17 [2018-06-22 19:19:41,913 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2018-06-22 19:19:41,913 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 19:19:41,916 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 19:19:41,916 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 19:19:41,917 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 19:19:41,917 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 19:19:41,917 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:19:41,917 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 19:19:41,917 INFO ]: Interpolant automaton has 13 states. [2018-06-22 19:19:41,917 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 19:19:41,918 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 19:19:41,918 INFO ]: Found error trace [2018-06-22 19:19:41,918 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:19:41,918 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:19:41,918 INFO ]: Analyzing trace with hash 2119922091, now seen corresponding path program 3 times [2018-06-22 19:19:41,918 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:19:41,918 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:19:41,919 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:19:41,919 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 19:19:41,919 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:19:42,049 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:19:42,525 WARN ]: Spent 197.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2018-06-22 19:19:42,653 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 19:19:42,653 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:19:42,653 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 19:19:42,666 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 19:19:42,848 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 19:19:42,848 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:19:42,854 INFO ]: Computing forward predicates... [2018-06-22 19:19:43,285 WARN ]: Spent 195.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 7 [2018-06-22 19:19:43,653 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 19:19:43,683 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:19:43,683 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2018-06-22 19:19:43,683 INFO ]: Interpolant automaton has 17 states [2018-06-22 19:19:43,683 INFO ]: Constructing interpolant automaton starting with 17 interpolants. [2018-06-22 19:19:43,683 INFO ]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2018-06-22 19:19:43,684 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 17 states. [2018-06-22 19:19:43,940 WARN ]: Spent 156.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 89 [2018-06-22 19:19:44,257 WARN ]: Spent 267.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 104 [2018-06-22 19:19:44,452 WARN ]: Spent 137.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 87 [2018-06-22 19:19:44,709 WARN ]: Spent 162.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 84 [2018-06-22 19:19:44,748 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:19:44,748 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-22 19:19:44,750 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 19:19:44,750 INFO ]: Start accepts. Automaton has 17 states. Word has length 21 [2018-06-22 19:19:44,750 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:19:44,751 INFO ]: With dead ends: 19 [2018-06-22 19:19:44,751 INFO ]: Without dead ends: 19 [2018-06-22 19:19:44,751 INFO ]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2018-06-22 19:19:44,751 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 19:19:44,754 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 19:19:44,754 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 19:19:44,757 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-22 19:19:44,757 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-22 19:19:44,757 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:19:44,757 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-22 19:19:44,757 INFO ]: Interpolant automaton has 17 states. [2018-06-22 19:19:44,757 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-22 19:19:44,758 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 19:19:44,758 INFO ]: Found error trace [2018-06-22 19:19:44,758 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:19:44,758 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:19:44,758 INFO ]: Analyzing trace with hash 1762711629, now seen corresponding path program 4 times [2018-06-22 19:19:44,758 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:19:44,758 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:19:44,759 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:19:44,759 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 19:19:44,759 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:19:44,927 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:19:45,352 WARN ]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-06-22 19:19:46,175 WARN ]: Spent 746.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 25 [2018-06-22 19:19:46,321 WARN ]: Spent 107.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 27 [2018-06-22 19:19:46,647 WARN ]: Spent 124.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 26 [2018-06-22 19:19:46,765 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 19:19:46,765 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:19:46,765 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 19:19:46,776 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 19:19:46,911 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 19:19:46,911 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:19:46,918 INFO ]: Computing forward predicates... [2018-06-22 19:19:47,305 INFO ]: Checked inductivity of 36 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-06-22 19:19:47,333 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:19:47,333 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2018-06-22 19:19:47,334 INFO ]: Interpolant automaton has 20 states [2018-06-22 19:19:47,334 INFO ]: Constructing interpolant automaton starting with 20 interpolants. [2018-06-22 19:19:47,334 INFO ]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2018-06-22 19:19:47,334 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 20 states. [2018-06-22 19:19:47,551 WARN ]: Spent 133.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2018-06-22 19:19:47,701 WARN ]: Spent 101.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2018-06-22 19:19:48,062 WARN ]: Spent 336.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2018-06-22 19:19:48,195 WARN ]: Spent 102.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2018-06-22 19:19:48,362 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:19:48,362 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-22 19:19:48,363 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 19:19:48,363 INFO ]: Start accepts. Automaton has 20 states. Word has length 25 [2018-06-22 19:19:48,363 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:19:48,363 INFO ]: With dead ends: 21 [2018-06-22 19:19:48,363 INFO ]: Without dead ends: 21 [2018-06-22 19:19:48,364 INFO ]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2018-06-22 19:19:48,364 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-22 19:19:48,368 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-22 19:19:48,368 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-22 19:19:48,369 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-22 19:19:48,369 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 25 [2018-06-22 19:19:48,369 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:19:48,369 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-22 19:19:48,369 INFO ]: Interpolant automaton has 20 states. [2018-06-22 19:19:48,369 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-22 19:19:48,370 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 19:19:48,370 INFO ]: Found error trace [2018-06-22 19:19:48,370 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:19:48,370 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:19:48,370 INFO ]: Analyzing trace with hash 853117551, now seen corresponding path program 5 times [2018-06-22 19:19:48,370 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:19:48,370 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:19:48,370 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:19:48,370 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 19:19:48,370 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:19:48,672 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:19:49,338 WARN ]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-06-22 19:19:50,516 WARN ]: Spent 1.10 s on a formula simplification. DAG size of input: 123 DAG size of output: 19 [2018-06-22 19:19:50,783 WARN ]: Spent 240.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 21 [2018-06-22 19:19:51,020 WARN ]: Spent 215.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 26 [2018-06-22 19:19:51,429 WARN ]: Spent 357.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 24 [2018-06-22 19:19:51,825 WARN ]: Spent 341.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 22 [2018-06-22 19:19:52,378 WARN ]: Spent 450.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 25 [2018-06-22 19:19:52,737 WARN ]: Spent 306.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 20 [2018-06-22 19:19:52,956 WARN ]: Spent 154.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 10 [2018-06-22 19:19:52,970 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 19:19:52,970 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:19:52,970 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 19:19:52,978 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 19:19:53,251 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-06-22 19:19:53,252 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:19:53,260 INFO ]: Computing forward predicates... [2018-06-22 19:19:53,797 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 19:19:53,818 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:19:53,818 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2018-06-22 19:19:53,818 INFO ]: Interpolant automaton has 25 states [2018-06-22 19:19:53,818 INFO ]: Constructing interpolant automaton starting with 25 interpolants. [2018-06-22 19:19:53,819 INFO ]: CoverageRelationStatistics Valid=56, Invalid=544, Unknown=0, NotChecked=0, Total=600 [2018-06-22 19:19:53,819 INFO ]: Start difference. First operand 21 states and 22 transitions. Second operand 25 states. [2018-06-22 19:19:54,023 WARN ]: Spent 132.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2018-06-22 19:19:54,276 WARN ]: Spent 207.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 93 [2018-06-22 19:19:54,724 WARN ]: Spent 191.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 92 [2018-06-22 19:19:54,918 WARN ]: Spent 155.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 85 [2018-06-22 19:19:55,112 WARN ]: Spent 130.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 77 [2018-06-22 19:19:55,271 WARN ]: Spent 117.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 71 [2018-06-22 19:19:55,326 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:19:55,326 INFO ]: Finished difference Result 23 states and 24 transitions. [2018-06-22 19:19:55,329 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 19:19:55,329 INFO ]: Start accepts. Automaton has 25 states. Word has length 29 [2018-06-22 19:19:55,329 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:19:55,330 INFO ]: With dead ends: 23 [2018-06-22 19:19:55,330 INFO ]: Without dead ends: 23 [2018-06-22 19:19:55,331 INFO ]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=184, Invalid=808, Unknown=0, NotChecked=0, Total=992 [2018-06-22 19:19:55,331 INFO ]: Start minimizeSevpa. Operand 23 states. [2018-06-22 19:19:55,334 INFO ]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-06-22 19:19:55,334 INFO ]: Start removeUnreachable. Operand 23 states. [2018-06-22 19:19:55,334 INFO ]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-06-22 19:19:55,334 INFO ]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 29 [2018-06-22 19:19:55,334 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:19:55,334 INFO ]: Abstraction has 23 states and 24 transitions. [2018-06-22 19:19:55,334 INFO ]: Interpolant automaton has 25 states. [2018-06-22 19:19:55,334 INFO ]: Start isEmpty. Operand 23 states and 24 transitions. [2018-06-22 19:19:55,335 INFO ]: Finished isEmpty. Found accepting run of length 34 [2018-06-22 19:19:55,335 INFO ]: Found error trace [2018-06-22 19:19:55,335 INFO ]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:19:55,335 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:19:55,336 INFO ]: Analyzing trace with hash -1661294575, now seen corresponding path program 6 times [2018-06-22 19:19:55,336 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:19:55,336 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:19:55,336 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:19:55,336 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 19:19:55,336 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:19:55,807 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:19:57,752 WARN ]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-06-22 19:20:02,126 WARN ]: Spent 4.12 s on a formula simplification. DAG size of input: 685 DAG size of output: 26 [2018-06-22 19:20:05,534 WARN ]: Spent 3.09 s on a formula simplification. DAG size of input: 412 DAG size of output: 21 [2018-06-22 19:20:10,285 WARN ]: Spent 4.46 s on a formula simplification. DAG size of input: 558 DAG size of output: 28 [2018-06-22 19:20:12,537 WARN ]: Spent 1.77 s on a formula simplification. DAG size of input: 453 DAG size of output: 33 [2018-06-22 19:20:14,238 WARN ]: Spent 1.52 s on a formula simplification. DAG size of input: 448 DAG size of output: 23 [2018-06-22 19:20:18,427 WARN ]: Spent 3.78 s on a formula simplification. DAG size of input: 1153 DAG size of output: 27 [2018-06-22 19:20:25,900 WARN ]: Spent 6.96 s on a formula simplification. DAG size of input: 1438 DAG size of output: 28 [2018-06-22 19:20:29,808 WARN ]: Spent 3.43 s on a formula simplification. DAG size of input: 1135 DAG size of output: 20 [2018-06-22 19:20:35,257 WARN ]: Spent 5.08 s on a formula simplification. DAG size of input: 680 DAG size of output: 19 [2018-06-22 19:20:35,273 INFO ]: Checked inductivity of 78 backedges. 2 proven. 54 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-06-22 19:20:35,281 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:20:35,281 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 19:20:35,287 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 19:20:35,547 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-06-22 19:20:35,547 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:20:35,557 INFO ]: Computing forward predicates... [2018-06-22 19:20:36,022 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 19:20:36,054 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:20:36,054 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2018-06-22 19:20:36,055 INFO ]: Interpolant automaton has 28 states [2018-06-22 19:20:36,055 INFO ]: Constructing interpolant automaton starting with 28 interpolants. [2018-06-22 19:20:36,055 INFO ]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2018-06-22 19:20:36,055 INFO ]: Start difference. First operand 23 states and 24 transitions. Second operand 28 states. [2018-06-22 19:20:36,271 WARN ]: Spent 132.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 77 [2018-06-22 19:20:36,470 WARN ]: Spent 158.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 86 [2018-06-22 19:20:36,666 WARN ]: Spent 166.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 87 [2018-06-22 19:20:36,878 WARN ]: Spent 178.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 94 [2018-06-22 19:20:37,069 WARN ]: Spent 154.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2018-06-22 19:20:37,251 WARN ]: Spent 142.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 80 [2018-06-22 19:20:37,422 WARN ]: Spent 127.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2018-06-22 19:20:37,464 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:20:37,464 INFO ]: Finished difference Result 25 states and 26 transitions. [2018-06-22 19:20:37,465 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-22 19:20:37,465 INFO ]: Start accepts. Automaton has 28 states. Word has length 33 [2018-06-22 19:20:37,465 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:20:37,466 INFO ]: With dead ends: 25 [2018-06-22 19:20:37,466 INFO ]: Without dead ends: 25 [2018-06-22 19:20:37,467 INFO ]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 38.0s TimeCoverageRelationStatistics Valid=246, Invalid=1014, Unknown=0, NotChecked=0, Total=1260 [2018-06-22 19:20:37,467 INFO ]: Start minimizeSevpa. Operand 25 states. [2018-06-22 19:20:37,473 INFO ]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-06-22 19:20:37,473 INFO ]: Start removeUnreachable. Operand 25 states. [2018-06-22 19:20:37,474 INFO ]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-06-22 19:20:37,474 INFO ]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 33 [2018-06-22 19:20:37,474 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:20:37,474 INFO ]: Abstraction has 25 states and 26 transitions. [2018-06-22 19:20:37,474 INFO ]: Interpolant automaton has 28 states. [2018-06-22 19:20:37,474 INFO ]: Start isEmpty. Operand 25 states and 26 transitions. [2018-06-22 19:20:37,475 INFO ]: Finished isEmpty. Found accepting run of length 38 [2018-06-22 19:20:37,475 INFO ]: Found error trace [2018-06-22 19:20:37,475 INFO ]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:20:37,475 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:20:37,475 INFO ]: Analyzing trace with hash -1494134477, now seen corresponding path program 7 times [2018-06-22 19:20:37,475 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:20:37,475 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:20:37,476 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:20:37,476 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 19:20:37,476 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:20:38,653 INFO ]: Conjunction of SSA is unsat Received shutdown request... [2018-06-22 19:20:40,606 FATAL]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Timeout exceeded at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.walkLeafNode(Interpolator.java:265) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.access$1(Interpolator.java:263) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator$ProofTreeWalker.walk(Interpolator.java:132) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:122) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:113) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.interpolate(Interpolator.java:220) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:201) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:919) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.managedscript.ManagedScript.getInterpolants(ManagedScript.java:199) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:282) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsTree(InterpolatingTraceCheckCraig.java:271) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:207) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructCraig(TraceCheckConstructor.java:210) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructTraceCheck(TraceCheckConstructor.java:180) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.get(TraceCheckConstructor.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.MultiTrackRefinementStrategy.getTraceCheck(MultiTrackRefinementStrategy.java:228) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.checkFeasibility(BaseRefinementStrategy.java:220) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:194) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:70) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:410) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:425) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:367) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:309) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:151) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:119) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:324) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.runToolchainDefault(DefaultToolchainJob.java:221) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.BasicToolchainJob.run(BasicToolchainJob.java:134) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2018-06-22 19:20:40,613 INFO ]: Toolchain (without parser) took 63739.63 ms. Allocated memory was 305.1 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 246.7 MB in the beginning and 656.2 MB in the end (delta: -409.4 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-22 19:20:40,614 INFO ]: SmtParser took 0.06 ms. Allocated memory is still 305.1 MB. Free memory is still 270.8 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 19:20:40,617 INFO ]: ChcToBoogie took 54.06 ms. Allocated memory is still 305.1 MB. Free memory was 246.7 MB in the beginning and 244.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 19:20:40,617 INFO ]: Boogie Preprocessor took 54.70 ms. Allocated memory is still 305.1 MB. Free memory was 244.7 MB in the beginning and 242.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 3.6 GB. [2018-06-22 19:20:40,617 INFO ]: RCFGBuilder took 379.79 ms. Allocated memory is still 305.1 MB. Free memory was 242.7 MB in the beginning and 218.6 MB in the end (delta: 24.0 MB). Peak memory consumption was 24.0 MB. Max. memory is 3.6 GB. [2018-06-22 19:20:40,618 INFO ]: TraceAbstraction took 63241.42 ms. Allocated memory was 305.1 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 218.6 MB in the beginning and 656.2 MB in the end (delta: -437.6 MB). Peak memory consumption was 1.2 GB. Max. memory is 3.6 GB. [2018-06-22 19:20:40,623 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.06 ms. Allocated memory is still 305.1 MB. Free memory is still 270.8 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 54.06 ms. Allocated memory is still 305.1 MB. Free memory was 246.7 MB in the beginning and 244.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 54.70 ms. Allocated memory is still 305.1 MB. Free memory was 244.7 MB in the beginning and 242.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 3.6 GB. * RCFGBuilder took 379.79 ms. Allocated memory is still 305.1 MB. Free memory was 242.7 MB in the beginning and 218.6 MB in the end (delta: 24.0 MB). Peak memory consumption was 24.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 63241.42 ms. Allocated memory was 305.1 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 218.6 MB in the beginning and 656.2 MB in the end (delta: -437.6 MB). Peak memory consumption was 1.2 GB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: Timeout exceeded de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: Timeout exceeded: de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.walkLeafNode(Interpolator.java:265) RESULT: Ultimate could not prove your program: Toolchain returned no result. Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/metros_4_e1_821_e5_911.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_19-20-40-640.csv Completed graceful shutdown