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_srvr_11.cil.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 14:16:13,556 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 14:16:13,558 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 14:16:13,570 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 14:16:13,570 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 14:16:13,571 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 14:16:13,572 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 14:16:13,576 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 14:16:13,577 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 14:16:13,578 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 14:16:13,579 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 14:16:13,579 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 14:16:13,580 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 14:16:13,581 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 14:16:13,582 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 14:16:13,585 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 14:16:13,586 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 14:16:13,599 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 14:16:13,601 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 14:16:13,602 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 14:16:13,603 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 14:16:13,605 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 14:16:13,605 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 14:16:13,605 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 14:16:13,606 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 14:16:13,607 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 14:16:13,612 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 14:16:13,613 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 14:16:13,614 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 14:16:13,614 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 14:16:13,615 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 14:16:13,615 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 14:16:13,616 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 14:16:13,616 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 14:16:13,617 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 14:16:13,617 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 14:16:13,636 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 14:16:13,636 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 14:16:13,636 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 14:16:13,637 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 14:16:13,638 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 14:16:13,638 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 14:16:13,638 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 14:16:13,638 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 14:16:13,638 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 14:16:13,639 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 14:16:13,639 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 14:16:13,639 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 14:16:13,639 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 14:16:13,639 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 14:16:13,640 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 14:16:13,640 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 14:16:13,640 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 14:16:13,640 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 14:16:13,640 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 14:16:13,642 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 14:16:13,642 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 14:16:13,694 INFO ]: Repository-Root is: /tmp [2018-06-22 14:16:13,711 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 14:16:13,715 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 14:16:13,716 INFO ]: Initializing SmtParser... [2018-06-22 14:16:13,717 INFO ]: SmtParser initialized [2018-06-22 14:16:13,718 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/cav12/s3_srvr_11.cil.smt2 [2018-06-22 14:16:13,719 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 14:16:13,812 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/s3_srvr_11.cil.smt2 unknown [2018-06-22 14:16:14,391 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/s3_srvr_11.cil.smt2 [2018-06-22 14:16:14,395 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 14:16:14,402 INFO ]: Walking toolchain with 4 elements. [2018-06-22 14:16:14,402 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 14:16:14,402 INFO ]: Initializing ChcToBoogie... [2018-06-22 14:16:14,403 INFO ]: ChcToBoogie initialized [2018-06-22 14:16:14,406 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:16:14" (1/1) ... [2018-06-22 14:16:14,458 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:16:14 Unit [2018-06-22 14:16:14,458 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 14:16:14,459 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 14:16:14,459 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 14:16:14,459 INFO ]: Boogie Preprocessor initialized [2018-06-22 14:16:14,480 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:16:14" (1/1) ... [2018-06-22 14:16:14,480 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:16:14" (1/1) ... [2018-06-22 14:16:14,497 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:16:14" (1/1) ... [2018-06-22 14:16:14,497 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:16:14" (1/1) ... [2018-06-22 14:16:14,523 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:16:14" (1/1) ... [2018-06-22 14:16:14,525 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:16:14" (1/1) ... [2018-06-22 14:16:14,529 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:16:14" (1/1) ... [2018-06-22 14:16:14,538 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 14:16:14,538 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 14:16:14,538 INFO ]: Initializing RCFGBuilder... [2018-06-22 14:16:14,538 INFO ]: RCFGBuilder initialized [2018-06-22 14:16:14,539 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:16:14" (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 14:16:14,557 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 14:16:14,557 INFO ]: Found specification of procedure False [2018-06-22 14:16:14,557 INFO ]: Found implementation of procedure False [2018-06-22 14:16:14,557 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 14:16:14,557 INFO ]: Found specification of procedure state [2018-06-22 14:16:14,557 INFO ]: Found implementation of procedure state [2018-06-22 14:16:14,557 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 14:16:14,557 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 14:16:14,557 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 14:16:14,901 INFO ]: Using library mode [2018-06-22 14:16:14,901 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:16:14 BoogieIcfgContainer [2018-06-22 14:16:14,901 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 14:16:14,903 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 14:16:14,903 INFO ]: Initializing TraceAbstraction... [2018-06-22 14:16:14,906 INFO ]: TraceAbstraction initialized [2018-06-22 14:16:14,906 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:16:14" (1/3) ... [2018-06-22 14:16:14,907 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@287b2502 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 02:16:14, skipping insertion in model container [2018-06-22 14:16:14,907 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:16:14" (2/3) ... [2018-06-22 14:16:14,908 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@287b2502 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 02:16:14, skipping insertion in model container [2018-06-22 14:16:14,908 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:16:14" (3/3) ... [2018-06-22 14:16:14,910 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 14:16:14,919 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 14:16:14,929 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 14:16:14,973 INFO ]: Using default assertion order modulation [2018-06-22 14:16:14,974 INFO ]: Interprodecural is true [2018-06-22 14:16:14,974 INFO ]: Hoare is false [2018-06-22 14:16:14,974 INFO ]: Compute interpolants for FPandBP [2018-06-22 14:16:14,974 INFO ]: Backedges is TWOTRACK [2018-06-22 14:16:14,974 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 14:16:14,974 INFO ]: Difference is false [2018-06-22 14:16:14,974 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 14:16:14,974 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 14:16:14,987 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 14:16:14,996 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 14:16:14,997 INFO ]: Found error trace [2018-06-22 14:16:14,997 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:16:14,998 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:16:15,003 INFO ]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times [2018-06-22 14:16:15,005 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:16:15,005 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:16:15,042 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:16:15,042 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:16:15,042 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:16:15,084 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:16:15,220 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 14:16:15,223 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 14:16:15,223 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 14:16:15,225 INFO ]: Interpolant automaton has 4 states [2018-06-22 14:16:15,243 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 14:16:15,243 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 14:16:15,247 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 14:16:15,355 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:16:15,355 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 14:16:15,356 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 14:16:15,357 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 14:16:15,357 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:16:15,367 INFO ]: With dead ends: 13 [2018-06-22 14:16:15,367 INFO ]: Without dead ends: 13 [2018-06-22 14:16:15,369 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 14:16:15,385 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 14:16:15,405 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 14:16:15,406 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 14:16:15,407 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 14:16:15,408 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 14:16:15,408 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:16:15,408 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 14:16:15,408 INFO ]: Interpolant automaton has 4 states. [2018-06-22 14:16:15,408 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 14:16:15,409 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 14:16:15,409 INFO ]: Found error trace [2018-06-22 14:16:15,409 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:16:15,410 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:16:15,410 INFO ]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times [2018-06-22 14:16:15,410 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:16:15,410 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:16:15,410 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:16:15,410 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:16:15,410 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:16:15,588 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:16:15,894 WARN ]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2018-06-22 14:16:15,915 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:16:15,915 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:16:15,915 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 14:16:15,923 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:16:15,995 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:16:16,016 INFO ]: Computing forward predicates... [2018-06-22 14:16:16,777 WARN ]: Spent 361.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 10 [2018-06-22 14:16:16,957 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:16:16,992 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:16:16,992 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-06-22 14:16:16,993 INFO ]: Interpolant automaton has 8 states [2018-06-22 14:16:16,993 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 14:16:16,993 INFO ]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-06-22 14:16:16,993 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2018-06-22 14:16:17,454 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:16:17,454 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 14:16:17,455 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 14:16:17,455 INFO ]: Start accepts. Automaton has 8 states. Word has length 13 [2018-06-22 14:16:17,455 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:16:17,455 INFO ]: With dead ends: 15 [2018-06-22 14:16:17,455 INFO ]: Without dead ends: 15 [2018-06-22 14:16:17,456 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2018-06-22 14:16:17,456 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 14:16:17,459 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 14:16:17,459 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 14:16:17,459 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 14:16:17,459 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 14:16:17,459 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:16:17,459 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 14:16:17,459 INFO ]: Interpolant automaton has 8 states. [2018-06-22 14:16:17,459 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 14:16:17,460 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 14:16:17,460 INFO ]: Found error trace [2018-06-22 14:16:17,460 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:16:17,460 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:16:17,460 INFO ]: Analyzing trace with hash -1649658231, now seen corresponding path program 2 times [2018-06-22 14:16:17,460 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:16:17,460 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:16:17,461 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:16:17,461 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:16:17,461 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:16:17,546 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:16:18,212 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 14:16:18,212 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:16:18,212 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 14:16:18,221 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 14:16:18,308 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 14:16:18,308 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:16:18,319 INFO ]: Computing forward predicates... [2018-06-22 14:16:19,301 WARN ]: Spent 158.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2018-06-22 14:16:19,425 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 14:16:19,446 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:16:19,446 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2018-06-22 14:16:19,447 INFO ]: Interpolant automaton has 12 states [2018-06-22 14:16:19,447 INFO ]: Constructing interpolant automaton starting with 12 interpolants. [2018-06-22 14:16:19,447 INFO ]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2018-06-22 14:16:19,447 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 12 states. [2018-06-22 14:16:19,582 WARN ]: Spent 102.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2018-06-22 14:16:19,704 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:16:19,705 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 14:16:19,708 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 14:16:19,708 INFO ]: Start accepts. Automaton has 12 states. Word has length 17 [2018-06-22 14:16:19,708 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:16:19,709 INFO ]: With dead ends: 17 [2018-06-22 14:16:19,709 INFO ]: Without dead ends: 17 [2018-06-22 14:16:19,709 INFO ]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2018-06-22 14:16:19,709 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 14:16:19,712 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 14:16:19,712 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 14:16:19,712 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 14:16:19,712 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 14:16:19,713 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:16:19,713 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 14:16:19,713 INFO ]: Interpolant automaton has 12 states. [2018-06-22 14:16:19,713 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 14:16:19,713 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 14:16:19,713 INFO ]: Found error trace [2018-06-22 14:16:19,713 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:16:19,714 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:16:19,714 INFO ]: Analyzing trace with hash 2119922091, now seen corresponding path program 3 times [2018-06-22 14:16:19,714 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:16:19,714 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:16:19,714 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:16:19,714 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:16:19,714 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:16:19,816 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:16:20,227 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 14:16:20,228 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:16:20,228 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 14:16:20,263 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 14:16:20,369 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 14:16:20,369 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:16:20,380 INFO ]: Computing forward predicates... [2018-06-22 14:16:25,176 WARN ]: Spent 3.88 s on a formula simplification. DAG size of input: 227 DAG size of output: 120 [2018-06-22 14:16:26,121 WARN ]: Spent 226.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 24 [2018-06-22 14:16:26,720 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 14:16:26,751 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:16:26,751 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2018-06-22 14:16:26,751 INFO ]: Interpolant automaton has 16 states [2018-06-22 14:16:26,752 INFO ]: Constructing interpolant automaton starting with 16 interpolants. [2018-06-22 14:16:26,752 INFO ]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2018-06-22 14:16:26,752 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 16 states. [2018-06-22 14:16:29,832 WARN ]: Spent 2.73 s on a formula simplification. DAG size of input: 141 DAG size of output: 138 [2018-06-22 14:16:30,311 WARN ]: Spent 447.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 120 [2018-06-22 14:16:30,822 WARN ]: Spent 483.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 121 [2018-06-22 14:16:31,386 WARN ]: Spent 515.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 134 [2018-06-22 14:16:31,415 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:16:31,415 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-22 14:16:31,416 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 14:16:31,416 INFO ]: Start accepts. Automaton has 16 states. Word has length 21 [2018-06-22 14:16:31,416 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:16:31,416 INFO ]: With dead ends: 19 [2018-06-22 14:16:31,417 INFO ]: Without dead ends: 19 [2018-06-22 14:16:31,417 INFO ]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2018-06-22 14:16:31,417 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 14:16:31,420 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 14:16:31,420 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 14:16:31,421 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-22 14:16:31,421 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-22 14:16:31,421 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:16:31,421 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-22 14:16:31,421 INFO ]: Interpolant automaton has 16 states. [2018-06-22 14:16:31,421 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-22 14:16:31,422 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 14:16:31,422 INFO ]: Found error trace [2018-06-22 14:16:31,422 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:16:31,422 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:16:31,422 INFO ]: Analyzing trace with hash 1762711629, now seen corresponding path program 4 times [2018-06-22 14:16:31,422 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:16:31,422 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:16:31,423 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:16:31,423 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:16:31,423 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:16:31,615 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:16:32,197 WARN ]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-06-22 14:16:32,541 WARN ]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-06-22 14:16:32,962 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 14:16:32,962 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:16:32,962 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 14:16:32,969 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 14:16:33,110 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 14:16:33,110 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:16:33,122 INFO ]: Computing forward predicates... [2018-06-22 14:16:34,207 WARN ]: Spent 199.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-06-22 14:16:34,411 INFO ]: Checked inductivity of 36 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 14:16:34,432 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:16:34,432 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2018-06-22 14:16:34,432 INFO ]: Interpolant automaton has 20 states [2018-06-22 14:16:34,432 INFO ]: Constructing interpolant automaton starting with 20 interpolants. [2018-06-22 14:16:34,432 INFO ]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2018-06-22 14:16:34,433 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 20 states. [2018-06-22 14:16:34,746 WARN ]: Spent 278.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 76 [2018-06-22 14:16:35,168 WARN ]: Spent 127.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 65 [2018-06-22 14:16:35,398 WARN ]: Spent 157.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 73 [2018-06-22 14:16:35,434 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:16:35,435 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-22 14:16:35,436 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 14:16:35,436 INFO ]: Start accepts. Automaton has 20 states. Word has length 25 [2018-06-22 14:16:35,436 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:16:35,437 INFO ]: With dead ends: 21 [2018-06-22 14:16:35,437 INFO ]: Without dead ends: 21 [2018-06-22 14:16:35,437 INFO ]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2018-06-22 14:16:35,437 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-22 14:16:35,440 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-22 14:16:35,440 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-22 14:16:35,441 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-22 14:16:35,441 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 25 [2018-06-22 14:16:35,441 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:16:35,441 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-22 14:16:35,441 INFO ]: Interpolant automaton has 20 states. [2018-06-22 14:16:35,441 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-22 14:16:35,442 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 14:16:35,442 INFO ]: Found error trace [2018-06-22 14:16:35,442 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:16:35,442 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:16:35,442 INFO ]: Analyzing trace with hash 853117551, now seen corresponding path program 5 times [2018-06-22 14:16:35,442 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:16:35,442 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:16:35,443 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:16:35,443 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:16:35,443 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:16:35,652 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:16:36,296 WARN ]: Spent 255.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 6 [2018-06-22 14:16:36,672 WARN ]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-06-22 14:16:36,826 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 14:16:36,826 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:16:36,826 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 14:16:36,832 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 14:16:37,064 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-06-22 14:16:37,064 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:16:37,078 INFO ]: Computing forward predicates... [2018-06-22 14:16:40,168 WARN ]: Spent 2.40 s on a formula simplification. DAG size of input: 317 DAG size of output: 115 [2018-06-22 14:16:46,841 WARN ]: Spent 6.02 s on a formula simplification. DAG size of input: 374 DAG size of output: 209 [2018-06-22 14:16:58,142 WARN ]: Spent 9.16 s on a formula simplification. DAG size of input: 517 DAG size of output: 212 [2018-06-22 14:16:58,741 WARN ]: Spent 212.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 39 [2018-06-22 14:16:59,132 INFO ]: Checked inductivity of 55 backedges. 2 proven. 37 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-06-22 14:16:59,153 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:16:59,153 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2018-06-22 14:16:59,153 INFO ]: Interpolant automaton has 23 states [2018-06-22 14:16:59,153 INFO ]: Constructing interpolant automaton starting with 23 interpolants. [2018-06-22 14:16:59,153 INFO ]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2018-06-22 14:16:59,153 INFO ]: Start difference. First operand 21 states and 22 transitions. Second operand 23 states. [2018-06-22 14:17:01,543 WARN ]: Spent 2.30 s on a formula simplification. DAG size of input: 302 DAG size of output: 232 [2018-06-22 14:17:02,110 WARN ]: Spent 485.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 49 [2018-06-22 14:17:02,678 WARN ]: Spent 500.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 44 [2018-06-22 14:17:03,365 WARN ]: Spent 608.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 53 [2018-06-22 14:17:04,091 WARN ]: Spent 638.00 ms on a formula simplification. DAG size of input: 306 DAG size of output: 59 [2018-06-22 14:17:06,857 WARN ]: Spent 2.64 s on a formula simplification. DAG size of input: 302 DAG size of output: 215 [2018-06-22 14:17:09,156 WARN ]: Spent 2.09 s on a formula simplification. DAG size of input: 302 DAG size of output: 227 [2018-06-22 14:17:09,233 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:17:09,233 INFO ]: Finished difference Result 25 states and 26 transitions. [2018-06-22 14:17:09,234 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-22 14:17:09,234 INFO ]: Start accepts. Automaton has 23 states. Word has length 29 [2018-06-22 14:17:09,234 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:17:09,234 INFO ]: With dead ends: 25 [2018-06-22 14:17:09,234 INFO ]: Without dead ends: 25 [2018-06-22 14:17:09,235 INFO ]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 30.7s TimeCoverageRelationStatistics Valid=201, Invalid=669, Unknown=0, NotChecked=0, Total=870 [2018-06-22 14:17:09,235 INFO ]: Start minimizeSevpa. Operand 25 states. [2018-06-22 14:17:09,238 INFO ]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-06-22 14:17:09,238 INFO ]: Start removeUnreachable. Operand 25 states. [2018-06-22 14:17:09,239 INFO ]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-06-22 14:17:09,239 INFO ]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 29 [2018-06-22 14:17:09,239 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:17:09,239 INFO ]: Abstraction has 25 states and 26 transitions. [2018-06-22 14:17:09,239 INFO ]: Interpolant automaton has 23 states. [2018-06-22 14:17:09,239 INFO ]: Start isEmpty. Operand 25 states and 26 transitions. [2018-06-22 14:17:09,240 INFO ]: Finished isEmpty. Found accepting run of length 38 [2018-06-22 14:17:09,240 INFO ]: Found error trace [2018-06-22 14:17:09,240 INFO ]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:17:09,240 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:17:09,240 INFO ]: Analyzing trace with hash -1494134477, now seen corresponding path program 6 times [2018-06-22 14:17:09,240 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:17:09,241 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:17:09,241 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:17:09,241 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:17:09,241 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:17:09,691 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:17:10,495 WARN ]: Spent 299.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 6 [2018-06-22 14:17:10,725 WARN ]: Spent 167.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 50 [2018-06-22 14:17:11,255 INFO ]: Checked inductivity of 105 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-22 14:17:11,255 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:17:11,255 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) [2018-06-22 14:17:11,270 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:17:11,580 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-06-22 14:17:11,580 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:17:11,601 INFO ]: Computing forward predicates... Received shutdown request... [2018-06-22 14:17:13,530 WARN ]: Removed 29 from assertion stack [2018-06-22 14:17:13,530 INFO ]: Timeout while computing interpolants [2018-06-22 14:17:13,731 WARN ]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:17:13,731 WARN ]: Verification canceled [2018-06-22 14:17:13,735 WARN ]: Timeout [2018-06-22 14:17:13,735 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 02:17:13 BoogieIcfgContainer [2018-06-22 14:17:13,735 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 14:17:13,736 INFO ]: Toolchain (without parser) took 59340.32 ms. Allocated memory was 308.8 MB in the beginning and 1.2 GB in the end (delta: 842.0 MB). Free memory was 241.3 MB in the beginning and 849.7 MB in the end (delta: -608.4 MB). Peak memory consumption was 865.2 MB. Max. memory is 3.6 GB. [2018-06-22 14:17:13,741 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 308.8 MB. Free memory is still 273.3 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 14:17:13,741 INFO ]: ChcToBoogie took 56.20 ms. Allocated memory is still 308.8 MB. Free memory was 241.3 MB in the beginning and 239.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 14:17:13,741 INFO ]: Boogie Preprocessor took 78.90 ms. Allocated memory is still 308.8 MB. Free memory was 239.3 MB in the beginning and 237.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 14:17:13,745 INFO ]: RCFGBuilder took 363.14 ms. Allocated memory is still 308.8 MB. Free memory was 237.3 MB in the beginning and 209.3 MB in the end (delta: 27.9 MB). Peak memory consumption was 27.9 MB. Max. memory is 3.6 GB. [2018-06-22 14:17:13,746 INFO ]: TraceAbstraction took 58832.46 ms. Allocated memory was 308.8 MB in the beginning and 1.2 GB in the end (delta: 842.0 MB). Free memory was 209.3 MB in the beginning and 849.7 MB in the end (delta: -640.4 MB). Peak memory consumption was 833.3 MB. Max. memory is 3.6 GB. [2018-06-22 14:17:13,748 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.07 ms. Allocated memory is still 308.8 MB. Free memory is still 273.3 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 56.20 ms. Allocated memory is still 308.8 MB. Free memory was 241.3 MB in the beginning and 239.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 78.90 ms. Allocated memory is still 308.8 MB. Free memory was 239.3 MB in the beginning and 237.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 363.14 ms. Allocated memory is still 308.8 MB. Free memory was 237.3 MB in the beginning and 209.3 MB in the end (delta: 27.9 MB). Peak memory consumption was 27.9 MB. Max. memory is 3.6 GB. * TraceAbstraction took 58832.46 ms. Allocated memory was 308.8 MB in the beginning and 1.2 GB in the end (delta: 842.0 MB). Free memory was 209.3 MB in the beginning and 849.7 MB in the end (delta: -640.4 MB). Peak memory consumption was 833.3 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 analyzing trace of length 38 with TraceHistMax 8, while TraceCheckSpWp was constructing forward predicates, while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 315. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 58.7s OverallTime, 7 OverallIterations, 8 TraceHistogramMax, 16.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 70 SDtfs, 113 SDslu, 287 SDs, 0 SdLazy, 250 SolverSat, 143 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 176 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 44.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred 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, 1.2s SatisfiabilityAnalysisTime, 35.8s InterpolantComputationTime, 219 NumberOfCodeBlocks, 219 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 208 ConstructedInterpolants, 0 QuantifiedInterpolants, 190320 SizeOfPredicates, 2042 NumberOfNonLiveVariables, 1905 ConjunctsInSsa, 101 ConjunctsInUnsatCore, 11 InterpolantComputations, 1 PerfectInterpolantSequences, 75/250 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/s3_srvr_11.cil.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_14-17-13-764.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/s3_srvr_11.cil.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_14-17-13-764.csv Completed graceful shutdown