java -Xss1g -Xmx4000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCHC.xml --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_No_Goto.epf -i /storage/chc-comp/vmt-chc-benchmarks/lustre/peterson_1_e7_4234.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 19:34:57,269 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 19:34:57,272 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 19:34:57,284 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 19:34:57,285 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 19:34:57,285 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 19:34:57,287 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 19:34:57,292 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 19:34:57,293 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 19:34:57,294 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 19:34:57,298 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 19:34:57,298 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 19:34:57,299 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 19:34:57,300 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 19:34:57,301 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 19:34:57,304 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 19:34:57,305 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 19:34:57,315 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 19:34:57,316 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 19:34:57,317 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 19:34:57,318 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 19:34:57,324 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 19:34:57,324 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 19:34:57,324 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 19:34:57,325 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 19:34:57,326 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 19:34:57,327 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 19:34:57,329 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 19:34:57,330 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 19:34:57,330 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 19:34:57,331 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 19:34:57,332 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 19:34:57,336 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 19:34:57,337 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 19:34:57,337 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 19:34:57,337 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_No_Goto.epf [2018-06-22 19:34:57,361 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 19:34:57,361 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 19:34:57,361 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 19:34:57,361 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 19:34:57,363 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 19:34:57,363 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 19:34:57,363 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 19:34:57,364 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 19:34:57,364 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 19:34:57,364 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 19:34:57,364 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 19:34:57,364 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 19:34:57,365 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 19:34:57,365 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 19:34:57,365 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 19:34:57,365 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 19:34:57,365 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 19:34:57,365 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 19:34:57,366 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 19:34:57,370 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 19:34:57,370 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 19:34:57,434 INFO ]: Repository-Root is: /tmp [2018-06-22 19:34:57,454 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 19:34:57,459 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 19:34:57,460 INFO ]: Initializing SmtParser... [2018-06-22 19:34:57,461 INFO ]: SmtParser initialized [2018-06-22 19:34:57,462 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/peterson_1_e7_4234.smt2 [2018-06-22 19:34:57,463 INFO ]: Parsing .smt2 file as a set of Horn Clauses No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-06-22 19:34:57,561 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/peterson_1_e7_4234.smt2 unknown [2018-06-22 19:34:58,308 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/peterson_1_e7_4234.smt2 [2018-06-22 19:34:58,313 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 19:34:58,319 INFO ]: Walking toolchain with 4 elements. [2018-06-22 19:34:58,319 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 19:34:58,319 INFO ]: Initializing ChcToBoogie... [2018-06-22 19:34:58,319 INFO ]: ChcToBoogie initialized [2018-06-22 19:34:58,323 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 07:34:58" (1/1) ... [2018-06-22 19:34:58,422 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:34:58 Unit [2018-06-22 19:34:58,422 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 19:34:58,423 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 19:34:58,423 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 19:34:58,423 INFO ]: Boogie Preprocessor initialized [2018-06-22 19:34:58,441 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:34:58" (1/1) ... [2018-06-22 19:34:58,441 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:34:58" (1/1) ... [2018-06-22 19:34:58,457 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:34:58" (1/1) ... [2018-06-22 19:34:58,457 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:34:58" (1/1) ... [2018-06-22 19:34:58,471 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:34:58" (1/1) ... [2018-06-22 19:34:58,473 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:34:58" (1/1) ... [2018-06-22 19:34:58,478 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:34:58" (1/1) ... [2018-06-22 19:34:58,492 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 19:34:58,493 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 19:34:58,493 INFO ]: Initializing RCFGBuilder... [2018-06-22 19:34:58,493 INFO ]: RCFGBuilder initialized [2018-06-22 19:34:58,494 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:34:58" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2018-06-22 19:34:58,513 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 19:34:58,513 INFO ]: Found specification of procedure False [2018-06-22 19:34:58,513 INFO ]: Found implementation of procedure False [2018-06-22 19:34:58,513 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 19:34:58,513 INFO ]: Found specification of procedure state [2018-06-22 19:34:58,513 INFO ]: Found implementation of procedure state [2018-06-22 19:34:58,513 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 19:34:58,513 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 19:34:58,513 INFO ]: Found implementation of procedure Ultimate.START Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 19:34:59,108 INFO ]: Using library mode [2018-06-22 19:34:59,109 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 07:34:59 BoogieIcfgContainer [2018-06-22 19:34:59,109 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 19:34:59,110 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 19:34:59,110 INFO ]: Initializing TraceAbstraction... [2018-06-22 19:34:59,115 INFO ]: TraceAbstraction initialized [2018-06-22 19:34:59,115 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 07:34:58" (1/3) ... [2018-06-22 19:34:59,116 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@433a5f58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 07:34:59, skipping insertion in model container [2018-06-22 19:34:59,116 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:34:58" (2/3) ... [2018-06-22 19:34:59,116 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@433a5f58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 07:34:59, skipping insertion in model container [2018-06-22 19:34:59,116 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 07:34:59" (3/3) ... [2018-06-22 19:34:59,119 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 19:34:59,129 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 19:34:59,140 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 19:34:59,191 INFO ]: Using default assertion order modulation [2018-06-22 19:34:59,191 INFO ]: Interprodecural is true [2018-06-22 19:34:59,192 INFO ]: Hoare is false [2018-06-22 19:34:59,192 INFO ]: Compute interpolants for FPandBP [2018-06-22 19:34:59,192 INFO ]: Backedges is TWOTRACK [2018-06-22 19:34:59,192 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 19:34:59,192 INFO ]: Difference is false [2018-06-22 19:34:59,192 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 19:34:59,192 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 19:34:59,210 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 19:34:59,226 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 19:34:59,226 INFO ]: Found error trace [2018-06-22 19:34:59,227 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:34:59,228 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:34:59,234 INFO ]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times [2018-06-22 19:34:59,236 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:34:59,237 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:34:59,286 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:34:59,286 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:34:59,286 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:34:59,422 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:34:59,799 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 19:34:59,802 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 19:34:59,802 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 19:34:59,804 INFO ]: Interpolant automaton has 4 states [2018-06-22 19:34:59,819 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 19:34:59,820 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 19:34:59,822 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 19:34:59,987 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:34:59,988 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 19:34:59,989 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 19:34:59,990 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 19:34:59,991 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:35:00,004 INFO ]: With dead ends: 13 [2018-06-22 19:35:00,004 INFO ]: Without dead ends: 13 [2018-06-22 19:35:00,008 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 19:35:00,027 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 19:35:00,067 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 19:35:00,070 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 19:35:00,071 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 19:35:00,072 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 19:35:00,072 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:35:00,072 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 19:35:00,073 INFO ]: Interpolant automaton has 4 states. [2018-06-22 19:35:00,073 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 19:35:00,074 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 19:35:00,074 INFO ]: Found error trace [2018-06-22 19:35:00,074 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:35:00,075 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:35:00,075 INFO ]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times [2018-06-22 19:35:00,075 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:35:00,075 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:35:00,076 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:35:00,076 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:35:00,076 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:35:00,235 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:35:01,181 WARN ]: Spent 714.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 57 [2018-06-22 19:35:01,248 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 19:35:01,248 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:35:01,248 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 19:35:01,255 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:35:01,471 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:35:01,483 INFO ]: Computing forward predicates... [2018-06-22 19:35:03,128 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 19:35:03,167 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:35:03,167 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-06-22 19:35:03,168 INFO ]: Interpolant automaton has 8 states [2018-06-22 19:35:03,168 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 19:35:03,168 INFO ]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-06-22 19:35:03,168 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2018-06-22 19:35:03,497 WARN ]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2018-06-22 19:35:03,679 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:35:03,679 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 19:35:03,679 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 19:35:03,680 INFO ]: Start accepts. Automaton has 8 states. Word has length 13 [2018-06-22 19:35:03,680 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:35:03,680 INFO ]: With dead ends: 15 [2018-06-22 19:35:03,680 INFO ]: Without dead ends: 15 [2018-06-22 19:35:03,681 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-06-22 19:35:03,681 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 19:35:03,684 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 19:35:03,684 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 19:35:03,684 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 19:35:03,684 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 19:35:03,685 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:35:03,685 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 19:35:03,685 INFO ]: Interpolant automaton has 8 states. [2018-06-22 19:35:03,685 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 19:35:03,685 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 19:35:03,685 INFO ]: Found error trace [2018-06-22 19:35:03,685 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:35:03,686 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:35:03,686 INFO ]: Analyzing trace with hash -1649658231, now seen corresponding path program 2 times [2018-06-22 19:35:03,686 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:35:03,686 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:35:03,687 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:35:03,687 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:35:03,687 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:35:03,831 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:35:04,382 WARN ]: Spent 221.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2018-06-22 19:35:04,555 WARN ]: Spent 159.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 70 [2018-06-22 19:35:04,744 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 19:35:04,745 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:35:04,745 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) [2018-06-22 19:35:04,761 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 19:35:05,020 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 19:35:05,020 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:35:05,030 INFO ]: Computing forward predicates... [2018-06-22 19:35:05,093 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 19:35:05,771 WARN ]: expecting exponential blowup for input size 15 [2018-06-22 19:35:07,043 WARN ]: expecting exponential blowup for input size 12 [2018-06-22 19:35:07,074 WARN ]: expecting exponential blowup for input size 11 [2018-06-22 19:35:07,228 WARN ]: expecting exponential blowup for input size 10 [2018-06-22 19:35:07,301 WARN ]: expecting exponential blowup for input size 11 [2018-06-22 19:35:07,310 WARN ]: expecting exponential blowup for input size 9 [2018-06-22 19:35:07,340 WARN ]: expecting exponential blowup for input size 13 [2018-06-22 19:35:09,020 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 19:35:09,027 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 19:35:09,036 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 19:35:09,086 WARN ]: expecting exponential blowup for input size 8 [2018-06-22 19:35:09,114 WARN ]: expecting exponential blowup for input size 8 [2018-06-22 19:35:09,298 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 19:35:29,913 WARN ]: Spent 878.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 27 [2018-06-22 19:35:29,963 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 19:35:29,986 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:35:29,986 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2018-06-22 19:35:29,986 INFO ]: Interpolant automaton has 12 states [2018-06-22 19:35:29,986 INFO ]: Constructing interpolant automaton starting with 12 interpolants. [2018-06-22 19:35:29,987 INFO ]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2018-06-22 19:35:29,987 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 12 states. [2018-06-22 19:35:30,588 WARN ]: Spent 488.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 122 [2018-06-22 19:35:30,856 WARN ]: Spent 224.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 93 [2018-06-22 19:35:31,052 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:35:31,052 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 19:35:31,055 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 19:35:31,055 INFO ]: Start accepts. Automaton has 12 states. Word has length 17 [2018-06-22 19:35:31,055 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:35:31,056 INFO ]: With dead ends: 17 [2018-06-22 19:35:31,056 INFO ]: Without dead ends: 17 [2018-06-22 19:35:31,056 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2018-06-22 19:35:31,056 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 19:35:31,060 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 19:35:31,060 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 19:35:31,060 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 19:35:31,060 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 19:35:31,061 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:35:31,061 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 19:35:31,061 INFO ]: Interpolant automaton has 12 states. [2018-06-22 19:35:31,061 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 19:35:31,061 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 19:35:31,061 INFO ]: Found error trace [2018-06-22 19:35:31,061 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:35:31,062 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:35:31,062 INFO ]: Analyzing trace with hash 2119922091, now seen corresponding path program 3 times [2018-06-22 19:35:31,062 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:35:31,062 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:35:31,062 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:35:31,062 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 19:35:31,062 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:35:31,287 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:35:31,869 WARN ]: Spent 206.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 33 [2018-06-22 19:35:32,130 WARN ]: Spent 196.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 88 [2018-06-22 19:35:32,724 WARN ]: Spent 427.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 29 [2018-06-22 19:35:32,811 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 19:35:32,811 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:35:32,811 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 19:35:32,818 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 19:35:33,161 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 19:35:33,161 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:35:33,177 INFO ]: Computing forward predicates... [2018-06-22 19:35:33,358 WARN ]: expecting exponential blowup for input size 8 [2018-06-22 19:35:33,805 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 19:35:33,807 WARN ]: expecting exponential blowup for input size 8 [2018-06-22 19:35:33,809 WARN ]: expecting exponential blowup for input size 8 [2018-06-22 19:35:33,813 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 19:35:33,815 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 19:35:33,817 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 19:35:35,679 WARN ]: Spent 160.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 29 [2018-06-22 19:35:35,788 WARN ]: Simplifying disjunction of 18144 conjuctions. This might take some time... [2018-06-22 19:35:58,853 INFO ]: Simplified to disjunction of 18144 conjuctions. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown