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/ctigar/dillig20.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 14:57:55,469 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 14:57:55,471 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 14:57:55,487 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 14:57:55,488 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 14:57:55,488 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 14:57:55,490 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 14:57:55,492 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 14:57:55,494 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 14:57:55,494 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 14:57:55,496 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 14:57:55,496 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 14:57:55,497 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 14:57:55,498 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 14:57:55,499 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 14:57:55,499 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 14:57:55,503 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 14:57:55,505 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 14:57:55,519 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 14:57:55,520 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 14:57:55,521 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 14:57:55,523 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 14:57:55,523 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 14:57:55,523 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 14:57:55,524 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 14:57:55,525 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 14:57:55,525 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 14:57:55,526 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 14:57:55,530 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 14:57:55,531 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 14:57:55,531 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 14:57:55,532 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 14:57:55,532 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 14:57:55,533 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 14:57:55,533 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 14:57:55,534 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 14:57:55,556 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 14:57:55,556 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 14:57:55,556 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 14:57:55,557 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 14:57:55,557 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 14:57:55,558 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 14:57:55,558 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 14:57:55,558 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 14:57:55,558 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 14:57:55,558 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 14:57:55,559 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 14:57:55,559 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 14:57:55,559 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 14:57:55,560 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 14:57:55,560 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 14:57:55,560 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 14:57:55,560 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 14:57:55,560 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 14:57:55,561 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 14:57:55,562 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 14:57:55,562 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 14:57:55,608 INFO ]: Repository-Root is: /tmp [2018-06-22 14:57:55,623 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 14:57:55,629 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 14:57:55,630 INFO ]: Initializing SmtParser... [2018-06-22 14:57:55,630 INFO ]: SmtParser initialized [2018-06-22 14:57:55,631 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/dillig20.c.smt2 [2018-06-22 14:57:55,632 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 14:57:55,707 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/dillig20.c.smt2 unknown [2018-06-22 14:57:55,992 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/dillig20.c.smt2 [2018-06-22 14:57:55,997 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 14:57:56,003 INFO ]: Walking toolchain with 4 elements. [2018-06-22 14:57:56,004 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 14:57:56,004 INFO ]: Initializing ChcToBoogie... [2018-06-22 14:57:56,004 INFO ]: ChcToBoogie initialized [2018-06-22 14:57:56,007 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:57:55" (1/1) ... [2018-06-22 14:57:56,056 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:57:56 Unit [2018-06-22 14:57:56,057 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 14:57:56,057 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 14:57:56,057 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 14:57:56,057 INFO ]: Boogie Preprocessor initialized [2018-06-22 14:57:56,079 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:57:56" (1/1) ... [2018-06-22 14:57:56,079 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:57:56" (1/1) ... [2018-06-22 14:57:56,087 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:57:56" (1/1) ... [2018-06-22 14:57:56,087 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:57:56" (1/1) ... [2018-06-22 14:57:56,103 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:57:56" (1/1) ... [2018-06-22 14:57:56,104 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:57:56" (1/1) ... [2018-06-22 14:57:56,106 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:57:56" (1/1) ... [2018-06-22 14:57:56,108 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 14:57:56,108 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 14:57:56,108 INFO ]: Initializing RCFGBuilder... [2018-06-22 14:57:56,108 INFO ]: RCFGBuilder initialized [2018-06-22 14:57:56,109 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:57:56" (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 14:57:56,136 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 14:57:56,137 INFO ]: Found specification of procedure False [2018-06-22 14:57:56,137 INFO ]: Found implementation of procedure False [2018-06-22 14:57:56,137 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 14:57:56,137 INFO ]: Found specification of procedure state [2018-06-22 14:57:56,137 INFO ]: Found implementation of procedure state [2018-06-22 14:57:56,137 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 14:57:56,137 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 14:57:56,137 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 14:57:56,401 INFO ]: Using library mode [2018-06-22 14:57:56,402 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:57:56 BoogieIcfgContainer [2018-06-22 14:57:56,402 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 14:57:56,403 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 14:57:56,403 INFO ]: Initializing TraceAbstraction... [2018-06-22 14:57:56,406 INFO ]: TraceAbstraction initialized [2018-06-22 14:57:56,407 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:57:55" (1/3) ... [2018-06-22 14:57:56,407 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e757662 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 02:57:56, skipping insertion in model container [2018-06-22 14:57:56,408 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:57:56" (2/3) ... [2018-06-22 14:57:56,408 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e757662 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 02:57:56, skipping insertion in model container [2018-06-22 14:57:56,408 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:57:56" (3/3) ... [2018-06-22 14:57:56,410 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 14:57:56,418 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 14:57:56,432 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 14:57:56,501 INFO ]: Using default assertion order modulation [2018-06-22 14:57:56,502 INFO ]: Interprodecural is true [2018-06-22 14:57:56,502 INFO ]: Hoare is false [2018-06-22 14:57:56,502 INFO ]: Compute interpolants for FPandBP [2018-06-22 14:57:56,502 INFO ]: Backedges is TWOTRACK [2018-06-22 14:57:56,502 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 14:57:56,502 INFO ]: Difference is false [2018-06-22 14:57:56,502 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 14:57:56,502 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 14:57:56,527 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 14:57:56,538 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 14:57:56,538 INFO ]: Found error trace [2018-06-22 14:57:56,540 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:57:56,540 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:57:56,546 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-22 14:57:56,548 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:57:56,548 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:57:56,583 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:57:56,583 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:57:56,583 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:57:56,613 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:57:56,791 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 14:57:56,792 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 14:57:56,792 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 14:57:56,794 INFO ]: Interpolant automaton has 4 states [2018-06-22 14:57:56,811 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 14:57:56,811 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 14:57:56,813 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 14:57:56,925 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:57:56,925 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 14:57:56,926 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 14:57:56,927 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 14:57:56,927 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:57:56,936 INFO ]: With dead ends: 13 [2018-06-22 14:57:56,936 INFO ]: Without dead ends: 13 [2018-06-22 14:57:56,938 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 14:57:56,952 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 14:57:56,979 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 14:57:56,981 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 14:57:56,981 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 14:57:56,982 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 14:57:56,982 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:57:56,982 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 14:57:56,982 INFO ]: Interpolant automaton has 4 states. [2018-06-22 14:57:56,982 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 14:57:56,984 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 14:57:56,984 INFO ]: Found error trace [2018-06-22 14:57:56,984 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:57:56,984 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:57:56,985 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-22 14:57:56,985 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:57:56,985 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:57:56,986 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:57:56,987 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:57:56,987 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:57:57,066 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:57:57,292 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:57:57,292 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:57:57,292 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 14:57:57,300 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:57:57,355 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:57:57,364 INFO ]: Computing forward predicates... [2018-06-22 14:57:57,663 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:57:57,684 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:57:57,684 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-06-22 14:57:57,685 INFO ]: Interpolant automaton has 9 states [2018-06-22 14:57:57,685 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 14:57:57,685 INFO ]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2018-06-22 14:57:57,685 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 9 states. [2018-06-22 14:57:58,159 WARN ]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-06-22 14:57:58,261 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:57:58,262 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 14:57:58,262 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 14:57:58,262 INFO ]: Start accepts. Automaton has 9 states. Word has length 13 [2018-06-22 14:57:58,262 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:57:58,263 INFO ]: With dead ends: 15 [2018-06-22 14:57:58,263 INFO ]: Without dead ends: 15 [2018-06-22 14:57:58,264 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2018-06-22 14:57:58,264 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 14:57:58,266 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 14:57:58,266 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 14:57:58,267 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 14:57:58,267 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 14:57:58,267 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:57:58,267 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 14:57:58,267 INFO ]: Interpolant automaton has 9 states. [2018-06-22 14:57:58,267 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 14:57:58,268 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 14:57:58,268 INFO ]: Found error trace [2018-06-22 14:57:58,268 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:57:58,268 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:57:58,268 INFO ]: Analyzing trace with hash -1486246934, now seen corresponding path program 2 times [2018-06-22 14:57:58,268 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:57:58,268 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:57:58,269 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:57:58,269 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:57:58,269 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:57:58,322 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:57:58,872 WARN ]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-06-22 14:57:58,963 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 14:57:58,963 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:57:58,963 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 14:57:58,980 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 14:57:59,038 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 14:57:59,038 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:57:59,042 INFO ]: Computing forward predicates... [2018-06-22 14:57:59,538 WARN ]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-06-22 14:57:59,697 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 14:57:59,731 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:57:59,731 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2018-06-22 14:57:59,731 INFO ]: Interpolant automaton has 11 states [2018-06-22 14:57:59,731 INFO ]: Constructing interpolant automaton starting with 11 interpolants. [2018-06-22 14:57:59,731 INFO ]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2018-06-22 14:57:59,731 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 11 states. [2018-06-22 14:58:00,086 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:58:00,087 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 14:58:00,088 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 14:58:00,088 INFO ]: Start accepts. Automaton has 11 states. Word has length 17 [2018-06-22 14:58:00,088 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:58:00,089 INFO ]: With dead ends: 17 [2018-06-22 14:58:00,089 INFO ]: Without dead ends: 17 [2018-06-22 14:58:00,089 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2018-06-22 14:58:00,089 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 14:58:00,093 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 14:58:00,093 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 14:58:00,093 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 14:58:00,093 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 14:58:00,093 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:58:00,093 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 14:58:00,093 INFO ]: Interpolant automaton has 11 states. [2018-06-22 14:58:00,093 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 14:58:00,094 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 14:58:00,094 INFO ]: Found error trace [2018-06-22 14:58:00,094 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:58:00,094 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:58:00,094 INFO ]: Analyzing trace with hash -2056434034, now seen corresponding path program 3 times [2018-06-22 14:58:00,094 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:58:00,094 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:58:00,095 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:58:00,095 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:58:00,095 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:58:00,144 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:58:00,392 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 14:58:00,392 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:58:00,392 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 14:58:00,407 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 14:58:00,509 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 14:58:00,509 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:58:00,514 INFO ]: Computing forward predicates... [2018-06-22 14:58:00,944 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 14:58:00,967 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:58:00,967 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2018-06-22 14:58:00,968 INFO ]: Interpolant automaton has 13 states [2018-06-22 14:58:00,968 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-22 14:58:00,968 INFO ]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2018-06-22 14:58:00,968 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 13 states. [2018-06-22 14:58:01,205 WARN ]: Spent 209.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 38 [2018-06-22 14:58:01,803 WARN ]: Spent 419.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2018-06-22 14:58:02,109 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:58:02,109 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-22 14:58:02,225 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 14:58:02,225 INFO ]: Start accepts. Automaton has 13 states. Word has length 21 [2018-06-22 14:58:02,226 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:58:02,226 INFO ]: With dead ends: 19 [2018-06-22 14:58:02,226 INFO ]: Without dead ends: 19 [2018-06-22 14:58:02,226 INFO ]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2018-06-22 14:58:02,227 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 14:58:02,230 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 14:58:02,230 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 14:58:02,231 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-22 14:58:02,231 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-22 14:58:02,233 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:58:02,233 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-22 14:58:02,233 INFO ]: Interpolant automaton has 13 states. [2018-06-22 14:58:02,233 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-22 14:58:02,233 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 14:58:02,233 INFO ]: Found error trace [2018-06-22 14:58:02,233 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:58:02,234 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:58:02,238 INFO ]: Analyzing trace with hash -434924750, now seen corresponding path program 4 times [2018-06-22 14:58:02,238 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:58:02,238 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:58:02,239 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:58:02,239 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:58:02,239 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:58:02,290 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:58:02,556 WARN ]: Spent 134.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 16 [2018-06-22 14:58:02,716 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 14:58:02,717 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:58:02,717 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 14:58:02,722 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 14:58:02,774 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 14:58:02,774 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:58:02,778 INFO ]: Computing forward predicates... [2018-06-22 14:58:03,036 WARN ]: Spent 149.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 20 [2018-06-22 14:58:03,620 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 14:58:03,639 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:58:03,639 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2018-06-22 14:58:03,639 INFO ]: Interpolant automaton has 15 states [2018-06-22 14:58:03,640 INFO ]: Constructing interpolant automaton starting with 15 interpolants. [2018-06-22 14:58:03,640 INFO ]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2018-06-22 14:58:03,640 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 15 states. [2018-06-22 14:58:03,989 WARN ]: Spent 279.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2018-06-22 14:58:04,432 WARN ]: Spent 122.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 35 [2018-06-22 14:58:04,464 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:58:04,464 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-22 14:58:04,467 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 14:58:04,467 INFO ]: Start accepts. Automaton has 15 states. Word has length 25 [2018-06-22 14:58:04,467 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:58:04,467 INFO ]: With dead ends: 21 [2018-06-22 14:58:04,467 INFO ]: Without dead ends: 21 [2018-06-22 14:58:04,468 INFO ]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2018-06-22 14:58:04,468 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-22 14:58:04,471 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-22 14:58:04,471 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-22 14:58:04,471 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-22 14:58:04,471 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 25 [2018-06-22 14:58:04,472 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:58:04,472 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-22 14:58:04,472 INFO ]: Interpolant automaton has 15 states. [2018-06-22 14:58:04,472 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-22 14:58:04,474 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 14:58:04,474 INFO ]: Found error trace [2018-06-22 14:58:04,474 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:58:04,474 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:58:04,474 INFO ]: Analyzing trace with hash 1986427350, now seen corresponding path program 5 times [2018-06-22 14:58:04,474 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:58:04,474 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:58:04,475 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:58:04,475 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:58:04,475 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:58:04,539 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:58:04,997 WARN ]: Spent 114.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2018-06-22 14:58:05,146 WARN ]: Spent 142.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2018-06-22 14:58:05,413 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 14:58:05,414 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:58:05,414 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 14:58:05,421 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 14:58:05,492 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-06-22 14:58:05,493 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:58:05,497 INFO ]: Computing forward predicates... [2018-06-22 14:58:06,602 WARN ]: Spent 720.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 33 [2018-06-22 14:58:06,927 WARN ]: Spent 142.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2018-06-22 14:58:09,378 WARN ]: Spent 1.88 s on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2018-06-22 14:58:09,757 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 14:58:09,776 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:58:09,776 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2018-06-22 14:58:09,776 INFO ]: Interpolant automaton has 20 states [2018-06-22 14:58:09,777 INFO ]: Constructing interpolant automaton starting with 20 interpolants. [2018-06-22 14:58:09,777 INFO ]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2018-06-22 14:58:09,777 INFO ]: Start difference. First operand 21 states and 22 transitions. Second operand 20 states. [2018-06-22 14:58:10,367 WARN ]: Spent 502.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2018-06-22 14:58:10,627 WARN ]: Spent 190.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 34 [2018-06-22 14:58:11,017 WARN ]: Spent 361.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 32 [2018-06-22 14:58:11,229 WARN ]: Spent 187.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 29 [2018-06-22 14:58:11,506 WARN ]: Spent 229.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 30 [2018-06-22 14:58:11,916 WARN ]: Spent 383.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2018-06-22 14:58:11,947 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:58:11,947 INFO ]: Finished difference Result 23 states and 24 transitions. [2018-06-22 14:58:11,947 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 14:58:11,948 INFO ]: Start accepts. Automaton has 20 states. Word has length 29 [2018-06-22 14:58:11,948 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:58:11,948 INFO ]: With dead ends: 23 [2018-06-22 14:58:11,948 INFO ]: Without dead ends: 23 [2018-06-22 14:58:11,949 INFO ]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2018-06-22 14:58:11,949 INFO ]: Start minimizeSevpa. Operand 23 states. [2018-06-22 14:58:11,952 INFO ]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-06-22 14:58:11,952 INFO ]: Start removeUnreachable. Operand 23 states. [2018-06-22 14:58:11,953 INFO ]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-06-22 14:58:11,953 INFO ]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 29 [2018-06-22 14:58:11,953 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:58:11,953 INFO ]: Abstraction has 23 states and 24 transitions. [2018-06-22 14:58:11,953 INFO ]: Interpolant automaton has 20 states. [2018-06-22 14:58:11,953 INFO ]: Start isEmpty. Operand 23 states and 24 transitions. [2018-06-22 14:58:11,954 INFO ]: Finished isEmpty. Found accepting run of length 34 [2018-06-22 14:58:11,954 INFO ]: Found error trace [2018-06-22 14:58:11,954 INFO ]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:58:11,954 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:58:11,954 INFO ]: Analyzing trace with hash 800064122, now seen corresponding path program 6 times [2018-06-22 14:58:11,954 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:58:11,954 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:58:11,955 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:58:11,955 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:58:11,955 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:58:12,117 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:58:13,264 WARN ]: Spent 883.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2018-06-22 14:58:14,061 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 14:58:14,062 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:58:14,062 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:58:14,067 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 14:58:14,153 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-06-22 14:58:14,153 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:58:14,160 INFO ]: Computing forward predicates... [2018-06-22 14:58:36,641 WARN ]: Spent 20.98 s on a formula simplification. DAG size of input: 1446 DAG size of output: 119 [2018-06-22 14:58:37,249 WARN ]: Spent 507.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 47 [2018-06-22 14:58:37,813 WARN ]: Spent 497.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 50 [2018-06-22 14:58:38,050 WARN ]: Spent 123.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2018-06-22 14:58:38,402 WARN ]: Spent 137.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2018-06-22 14:58:42,173 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 14:58:42,200 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:58:42,200 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 28 [2018-06-22 14:58:42,200 INFO ]: Interpolant automaton has 28 states [2018-06-22 14:58:42,200 INFO ]: Constructing interpolant automaton starting with 28 interpolants. [2018-06-22 14:58:42,201 INFO ]: CoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2018-06-22 14:58:42,201 INFO ]: Start difference. First operand 23 states and 24 transitions. Second operand 28 states. [2018-06-22 14:58:44,000 WARN ]: Spent 1.61 s on a formula simplification. DAG size of input: 192 DAG size of output: 150 [2018-06-22 14:58:45,155 WARN ]: Spent 1.05 s on a formula simplification. DAG size of input: 178 DAG size of output: 81 [2018-06-22 14:58:46,072 WARN ]: Spent 866.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 46 [2018-06-22 14:58:47,461 WARN ]: Spent 1.30 s on a formula simplification. DAG size of input: 181 DAG size of output: 104 [2018-06-22 14:58:48,778 WARN ]: Spent 1.26 s on a formula simplification. DAG size of input: 182 DAG size of output: 103 [2018-06-22 14:58:50,281 WARN ]: Spent 1.43 s on a formula simplification. DAG size of input: 183 DAG size of output: 112 [2018-06-22 14:58:51,818 WARN ]: Spent 1.49 s on a formula simplification. DAG size of input: 182 DAG size of output: 110 [2018-06-22 14:58:51,888 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:58:51,889 INFO ]: Finished difference Result 25 states and 26 transitions. [2018-06-22 14:58:51,891 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-22 14:58:51,891 INFO ]: Start accepts. Automaton has 28 states. Word has length 33 [2018-06-22 14:58:51,891 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:58:51,892 INFO ]: With dead ends: 25 [2018-06-22 14:58:51,892 INFO ]: Without dead ends: 25 [2018-06-22 14:58:51,893 INFO ]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 34.4s TimeCoverageRelationStatistics Valid=207, Invalid=983, Unknown=0, NotChecked=0, Total=1190 [2018-06-22 14:58:51,893 INFO ]: Start minimizeSevpa. Operand 25 states. [2018-06-22 14:58:51,896 INFO ]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-06-22 14:58:51,896 INFO ]: Start removeUnreachable. Operand 25 states. [2018-06-22 14:58:51,896 INFO ]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-06-22 14:58:51,896 INFO ]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 33 [2018-06-22 14:58:51,897 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:58:51,897 INFO ]: Abstraction has 25 states and 26 transitions. [2018-06-22 14:58:51,897 INFO ]: Interpolant automaton has 28 states. [2018-06-22 14:58:51,897 INFO ]: Start isEmpty. Operand 25 states and 26 transitions. [2018-06-22 14:58:51,897 INFO ]: Finished isEmpty. Found accepting run of length 38 [2018-06-22 14:58:51,897 INFO ]: Found error trace [2018-06-22 14:58:51,897 INFO ]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:58:51,898 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:58:51,898 INFO ]: Analyzing trace with hash -411423458, now seen corresponding path program 7 times [2018-06-22 14:58:51,898 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:58:51,898 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:58:51,898 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:58:51,898 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:58:51,898 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:58:52,031 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:58:52,362 WARN ]: Spent 171.00 ms on a formula simplification. DAG size of input: 6 DAG size of output: 3 [2018-06-22 14:58:53,096 INFO ]: Checked inductivity of 105 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-22 14:58:53,096 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:58:53,096 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:58:53,102 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:58:53,175 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:58:53,188 INFO ]: Computing forward predicates... [2018-06-22 14:58:53,539 WARN ]: Spent 288.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2018-06-22 14:58:54,490 WARN ]: Spent 896.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2018-06-22 14:58:55,056 WARN ]: Spent 476.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 42 [2018-06-22 14:58:55,367 WARN ]: Spent 128.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 33 [2018-06-22 14:58:55,523 WARN ]: Spent 124.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2018-06-22 14:58:58,030 INFO ]: Checked inductivity of 105 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-22 14:58:58,050 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:58:58,062 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2018-06-22 14:58:58,063 INFO ]: Interpolant automaton has 32 states [2018-06-22 14:58:58,063 INFO ]: Constructing interpolant automaton starting with 32 interpolants. [2018-06-22 14:58:58,063 INFO ]: CoverageRelationStatistics Valid=102, Invalid=890, Unknown=0, NotChecked=0, Total=992 [2018-06-22 14:58:58,063 INFO ]: Start difference. First operand 25 states and 26 transitions. Second operand 32 states. [2018-06-22 14:58:59,331 WARN ]: Spent 1.15 s on a formula simplification. DAG size of input: 160 DAG size of output: 129 Received shutdown request... [2018-06-22 14:58:59,682 WARN ]: Removed 4 from assertion stack [2018-06-22 14:58:59,682 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-22 14:58:59,682 WARN ]: Verification canceled [2018-06-22 14:58:59,685 WARN ]: Timeout [2018-06-22 14:58:59,685 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 02:58:59 BoogieIcfgContainer [2018-06-22 14:58:59,685 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 14:58:59,686 INFO ]: Toolchain (without parser) took 63688.88 ms. Allocated memory was 309.3 MB in the beginning and 874.0 MB in the end (delta: 564.7 MB). Free memory was 258.7 MB in the beginning and 766.2 MB in the end (delta: -507.5 MB). Peak memory consumption was 650.2 MB. Max. memory is 3.6 GB. [2018-06-22 14:58:59,687 INFO ]: SmtParser took 0.06 ms. Allocated memory is still 309.3 MB. Free memory is still 274.8 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 14:58:59,687 INFO ]: ChcToBoogie took 53.27 ms. Allocated memory is still 309.3 MB. Free memory was 257.7 MB in the beginning and 255.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 14:58:59,688 INFO ]: Boogie Preprocessor took 50.61 ms. Allocated memory is still 309.3 MB. Free memory was 255.8 MB in the beginning and 254.8 MB in the end (delta: 996.3 kB). Peak memory consumption was 996.3 kB. Max. memory is 3.6 GB. [2018-06-22 14:58:59,688 INFO ]: RCFGBuilder took 293.79 ms. Allocated memory is still 309.3 MB. Free memory was 254.8 MB in the beginning and 243.6 MB in the end (delta: 11.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 3.6 GB. [2018-06-22 14:58:59,688 INFO ]: TraceAbstraction took 63282.05 ms. Allocated memory was 309.3 MB in the beginning and 874.0 MB in the end (delta: 564.7 MB). Free memory was 242.6 MB in the beginning and 766.2 MB in the end (delta: -523.6 MB). Peak memory consumption was 634.1 MB. Max. memory is 3.6 GB. [2018-06-22 14:58:59,691 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 309.3 MB. Free memory is still 274.8 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 53.27 ms. Allocated memory is still 309.3 MB. Free memory was 257.7 MB in the beginning and 255.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 50.61 ms. Allocated memory is still 309.3 MB. Free memory was 255.8 MB in the beginning and 254.8 MB in the end (delta: 996.3 kB). Peak memory consumption was 996.3 kB. Max. memory is 3.6 GB. * RCFGBuilder took 293.79 ms. Allocated memory is still 309.3 MB. Free memory was 254.8 MB in the beginning and 243.6 MB in the end (delta: 11.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 3.6 GB. * TraceAbstraction took 63282.05 ms. Allocated memory was 309.3 MB in the beginning and 874.0 MB in the end (delta: 564.7 MB). Free memory was 242.6 MB in the beginning and 766.2 MB in the end (delta: -523.6 MB). Peak memory consumption was 634.1 MB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [UNKNOWN] : Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 0). Cancelled while BasicCegarLoop was constructing difference of abstraction (25states) and interpolant automaton (currently 5 states, 32 states before enhancement), while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 155. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 63.1s OverallTime, 8 OverallIterations, 8 TraceHistogramMax, 16.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 97 SDtfs, 194 SDslu, 482 SDs, 0 SdLazy, 438 SolverSat, 264 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 291 GetRequests, 135 SyntacticMatches, 5 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 50.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=7, 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, 7 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 44.9s InterpolantComputationTime, 359 NumberOfCodeBlocks, 359 NumberOfCodeBlocksAsserted, 30 NumberOfCheckSat, 344 ConstructedInterpolants, 0 QuantifiedInterpolants, 4930864 SizeOfPredicates, 547 NumberOfNonLiveVariables, 1939 ConjunctsInSsa, 344 ConjunctsInUnsatCore, 15 InterpolantComputations, 1 PerfectInterpolantSequences, 168/616 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/dillig20.c.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_14-58-59-703.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/dillig20.c.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_14-58-59-703.csv Completed graceful shutdown