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/transmitter.6.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 14:42:36,225 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 14:42:36,228 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 14:42:36,240 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 14:42:36,241 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 14:42:36,242 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 14:42:36,245 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 14:42:36,250 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 14:42:36,254 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 14:42:36,254 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 14:42:36,255 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 14:42:36,255 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 14:42:36,256 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 14:42:36,259 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 14:42:36,260 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 14:42:36,261 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 14:42:36,273 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 14:42:36,275 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 14:42:36,276 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 14:42:36,277 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 14:42:36,278 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 14:42:36,280 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 14:42:36,281 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 14:42:36,281 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 14:42:36,282 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 14:42:36,285 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 14:42:36,286 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 14:42:36,287 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 14:42:36,288 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 14:42:36,290 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 14:42:36,291 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 14:42:36,292 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 14:42:36,292 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 14:42:36,292 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 14:42:36,293 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 14:42:36,293 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 14:42:36,315 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 14:42:36,316 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 14:42:36,318 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 14:42:36,318 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 14:42:36,319 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 14:42:36,319 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 14:42:36,319 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 14:42:36,320 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 14:42:36,320 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 14:42:36,320 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 14:42:36,320 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 14:42:36,320 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 14:42:36,321 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 14:42:36,321 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 14:42:36,321 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 14:42:36,322 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 14:42:36,322 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 14:42:36,322 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 14:42:36,322 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 14:42:36,323 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 14:42:36,324 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 14:42:36,372 INFO ]: Repository-Root is: /tmp [2018-06-22 14:42:36,387 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 14:42:36,390 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 14:42:36,392 INFO ]: Initializing SmtParser... [2018-06-22 14:42:36,392 INFO ]: SmtParser initialized [2018-06-22 14:42:36,392 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/cav12/transmitter.6.smt2 [2018-06-22 14:42:36,394 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 14:42:36,464 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/transmitter.6.smt2 unknown [2018-06-22 14:42:38,382 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/transmitter.6.smt2 [2018-06-22 14:42:38,393 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 14:42:38,399 INFO ]: Walking toolchain with 4 elements. [2018-06-22 14:42:38,400 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 14:42:38,400 INFO ]: Initializing ChcToBoogie... [2018-06-22 14:42:38,400 INFO ]: ChcToBoogie initialized [2018-06-22 14:42:38,403 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:42:38" (1/1) ... [2018-06-22 14:42:38,500 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:42:38 Unit [2018-06-22 14:42:38,511 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 14:42:38,512 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 14:42:38,512 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 14:42:38,512 INFO ]: Boogie Preprocessor initialized [2018-06-22 14:42:38,533 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:42:38" (1/1) ... [2018-06-22 14:42:38,533 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:42:38" (1/1) ... [2018-06-22 14:42:38,574 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:42:38" (1/1) ... [2018-06-22 14:42:38,574 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:42:38" (1/1) ... [2018-06-22 14:42:38,621 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:42:38" (1/1) ... [2018-06-22 14:42:38,625 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:42:38" (1/1) ... [2018-06-22 14:42:38,641 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:42:38" (1/1) ... [2018-06-22 14:42:38,655 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 14:42:38,656 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 14:42:38,656 INFO ]: Initializing RCFGBuilder... [2018-06-22 14:42:38,656 INFO ]: RCFGBuilder initialized [2018-06-22 14:42:38,657 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:42:38" (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 14:42:38,671 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 14:42:38,671 INFO ]: Found specification of procedure False [2018-06-22 14:42:38,671 INFO ]: Found implementation of procedure False [2018-06-22 14:42:38,671 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 14:42:38,671 INFO ]: Found specification of procedure state [2018-06-22 14:42:38,671 INFO ]: Found implementation of procedure state [2018-06-22 14:42:38,671 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 14:42:38,671 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 14:42:38,671 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 14:42:39,828 INFO ]: Using library mode [2018-06-22 14:42:39,828 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:42:39 BoogieIcfgContainer [2018-06-22 14:42:39,828 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 14:42:39,831 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 14:42:39,831 INFO ]: Initializing TraceAbstraction... [2018-06-22 14:42:39,835 INFO ]: TraceAbstraction initialized [2018-06-22 14:42:39,836 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:42:38" (1/3) ... [2018-06-22 14:42:39,836 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49b7303b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 02:42:39, skipping insertion in model container [2018-06-22 14:42:39,836 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:42:38" (2/3) ... [2018-06-22 14:42:39,837 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49b7303b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 02:42:39, skipping insertion in model container [2018-06-22 14:42:39,837 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:42:39" (3/3) ... [2018-06-22 14:42:39,839 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 14:42:39,850 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 14:42:39,860 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 14:42:39,906 INFO ]: Using default assertion order modulation [2018-06-22 14:42:39,907 INFO ]: Interprodecural is true [2018-06-22 14:42:39,907 INFO ]: Hoare is false [2018-06-22 14:42:39,907 INFO ]: Compute interpolants for FPandBP [2018-06-22 14:42:39,907 INFO ]: Backedges is TWOTRACK [2018-06-22 14:42:39,907 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 14:42:39,907 INFO ]: Difference is false [2018-06-22 14:42:39,907 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 14:42:39,907 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 14:42:39,923 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 14:42:39,936 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 14:42:39,936 INFO ]: Found error trace [2018-06-22 14:42:39,937 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:42:39,937 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:42:39,943 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-22 14:42:39,945 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:42:39,945 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:42:39,984 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:42:39,984 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:42:39,984 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:42:40,054 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:42:40,244 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 14:42:40,247 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 14:42:40,247 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 14:42:40,248 INFO ]: Interpolant automaton has 4 states [2018-06-22 14:42:40,262 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 14:42:40,262 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 14:42:40,264 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 14:42:40,453 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:42:40,454 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 14:42:40,455 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 14:42:40,456 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 14:42:40,456 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:42:40,466 INFO ]: With dead ends: 13 [2018-06-22 14:42:40,466 INFO ]: Without dead ends: 13 [2018-06-22 14:42:40,468 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 14:42:40,485 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 14:42:40,506 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 14:42:40,507 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 14:42:40,507 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 14:42:40,508 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 14:42:40,508 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:42:40,508 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 14:42:40,508 INFO ]: Interpolant automaton has 4 states. [2018-06-22 14:42:40,509 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 14:42:40,510 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 14:42:40,510 INFO ]: Found error trace [2018-06-22 14:42:40,510 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:42:40,510 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:42:40,510 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-22 14:42:40,510 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:42:40,510 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:42:40,511 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:42:40,511 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:42:40,511 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:42:40,809 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:42:41,335 WARN ]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-22 14:42:41,516 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:42:41,516 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:42:41,516 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 14:42:41,531 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:42:41,913 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:42:41,945 INFO ]: Computing forward predicates... [2018-06-22 14:42:44,149 WARN ]: Spent 465.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 24 [2018-06-22 14:42:44,312 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:42:44,347 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:42:44,347 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2018-06-22 14:42:44,348 INFO ]: Interpolant automaton has 10 states [2018-06-22 14:42:44,348 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-22 14:42:44,348 INFO ]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-06-22 14:42:44,348 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 10 states. [2018-06-22 14:42:44,981 WARN ]: Spent 447.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2018-06-22 14:42:45,209 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:42:45,209 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 14:42:45,210 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 14:42:45,210 INFO ]: Start accepts. Automaton has 10 states. Word has length 13 [2018-06-22 14:42:45,210 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:42:45,211 INFO ]: With dead ends: 15 [2018-06-22 14:42:45,211 INFO ]: Without dead ends: 15 [2018-06-22 14:42:45,211 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2018-06-22 14:42:45,212 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 14:42:45,214 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 14:42:45,214 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 14:42:45,215 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 14:42:45,215 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 14:42:45,215 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:42:45,215 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 14:42:45,215 INFO ]: Interpolant automaton has 10 states. [2018-06-22 14:42:45,215 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 14:42:45,215 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 14:42:45,215 INFO ]: Found error trace [2018-06-22 14:42:45,215 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:42:45,215 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:42:45,215 INFO ]: Analyzing trace with hash -1486246934, now seen corresponding path program 2 times [2018-06-22 14:42:45,215 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:42:45,216 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:42:45,216 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:42:45,216 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:42:45,216 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:42:45,572 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:42:46,202 WARN ]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-22 14:42:48,311 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 14:42:48,311 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:42:48,311 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 14:42:48,317 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 14:42:48,690 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 14:42:48,690 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:42:48,724 INFO ]: Computing forward predicates... [2018-06-22 14:42:50,239 WARN ]: Spent 197.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 18 [2018-06-22 14:42:51,419 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 14:42:51,455 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:42:51,455 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2018-06-22 14:42:51,456 INFO ]: Interpolant automaton has 14 states [2018-06-22 14:42:51,456 INFO ]: Constructing interpolant automaton starting with 14 interpolants. [2018-06-22 14:42:51,456 INFO ]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2018-06-22 14:42:51,456 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 14 states. [2018-06-22 14:42:51,653 WARN ]: Spent 133.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2018-06-22 14:42:51,922 WARN ]: Spent 115.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2018-06-22 14:42:51,981 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:42:51,982 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 14:42:51,983 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 14:42:51,983 INFO ]: Start accepts. Automaton has 14 states. Word has length 17 [2018-06-22 14:42:51,983 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:42:51,983 INFO ]: With dead ends: 17 [2018-06-22 14:42:51,984 INFO ]: Without dead ends: 17 [2018-06-22 14:42:51,984 INFO ]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2018-06-22 14:42:51,984 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 14:42:51,987 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 14:42:51,987 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 14:42:51,987 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 14:42:51,988 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 14:42:51,988 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:42:51,988 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 14:42:51,988 INFO ]: Interpolant automaton has 14 states. [2018-06-22 14:42:51,988 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 14:42:51,988 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 14:42:51,988 INFO ]: Found error trace [2018-06-22 14:42:51,989 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:42:51,989 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:42:51,989 INFO ]: Analyzing trace with hash -2056434034, now seen corresponding path program 3 times [2018-06-22 14:42:51,989 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:42:51,989 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:42:51,989 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:42:51,990 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:42:51,990 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:42:52,283 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:42:53,125 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 14:42:53,125 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:42:53,125 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 14:42:53,139 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 14:42:53,513 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 14:42:53,513 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:42:53,550 INFO ]: Computing forward predicates... [2018-06-22 14:42:55,404 WARN ]: Spent 201.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 25 [2018-06-22 14:42:55,488 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 14:42:55,514 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:42:55,514 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2018-06-22 14:42:55,514 INFO ]: Interpolant automaton has 18 states [2018-06-22 14:42:55,514 INFO ]: Constructing interpolant automaton starting with 18 interpolants. [2018-06-22 14:42:55,514 INFO ]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2018-06-22 14:42:55,514 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 18 states. [2018-06-22 14:42:55,788 WARN ]: Spent 204.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2018-06-22 14:42:56,134 WARN ]: Spent 201.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2018-06-22 14:42:56,400 WARN ]: Spent 222.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2018-06-22 14:42:56,721 WARN ]: Spent 285.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2018-06-22 14:42:56,780 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:42:56,780 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-22 14:42:56,781 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 14:42:56,782 INFO ]: Start accepts. Automaton has 18 states. Word has length 21 [2018-06-22 14:42:56,782 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:42:56,782 INFO ]: With dead ends: 21 [2018-06-22 14:42:56,782 INFO ]: Without dead ends: 21 [2018-06-22 14:42:56,783 INFO ]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=132, Invalid=374, Unknown=0, NotChecked=0, Total=506 [2018-06-22 14:42:56,783 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-22 14:42:56,786 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-22 14:42:56,786 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-22 14:42:56,786 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-22 14:42:56,786 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 21 [2018-06-22 14:42:56,787 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:42:56,787 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-22 14:42:56,787 INFO ]: Interpolant automaton has 18 states. [2018-06-22 14:42:56,787 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-22 14:42:56,787 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 14:42:56,787 INFO ]: Found error trace [2018-06-22 14:42:56,787 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:42:56,788 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:42:56,788 INFO ]: Analyzing trace with hash 1986427350, now seen corresponding path program 4 times [2018-06-22 14:42:56,788 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:42:56,788 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:42:56,789 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:42:56,789 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:42:56,789 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:42:57,373 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:42:58,425 WARN ]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-22 14:42:59,339 WARN ]: Spent 866.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 17 [2018-06-22 14:42:59,546 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 14:42:59,546 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:42:59,546 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 14:42:59,552 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown