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_Goto.epf -i /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_2.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 09:09:39,262 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 09:09:39,264 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 09:09:39,275 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 09:09:39,275 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 09:09:39,276 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 09:09:39,277 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 09:09:39,279 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 09:09:39,280 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 09:09:39,281 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 09:09:39,282 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 09:09:39,282 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 09:09:39,283 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 09:09:39,284 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 09:09:39,285 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 09:09:39,285 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 09:09:39,287 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 09:09:39,289 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 09:09:39,293 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 09:09:39,294 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 09:09:39,295 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 09:09:39,302 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 09:09:39,302 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 09:09:39,303 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 09:09:39,304 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 09:09:39,314 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 09:09:39,315 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 09:09:39,316 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 09:09:39,317 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 09:09:39,317 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 09:09:39,317 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 09:09:39,318 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 09:09:39,318 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 09:09:39,319 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 09:09:39,320 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 09:09:39,320 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 09:09:39,336 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 09:09:39,337 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 09:09:39,337 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 09:09:39,337 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 09:09:39,338 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 09:09:39,338 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 09:09:39,338 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 09:09:39,339 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 09:09:39,339 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 09:09:39,339 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 09:09:39,339 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 09:09:39,339 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 09:09:39,340 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 09:09:39,340 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 09:09:39,340 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 09:09:39,340 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 09:09:39,340 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 09:09:39,343 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 09:09:39,343 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 09:09:39,394 INFO ]: Repository-Root is: /tmp [2018-06-22 09:09:39,410 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 09:09:39,417 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 09:09:39,418 INFO ]: Initializing SmtParser... [2018-06-22 09:09:39,418 INFO ]: SmtParser initialized [2018-06-22 09:09:39,419 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_2.smt2 [2018-06-22 09:09:39,421 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 09:09:39,508 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_2.smt2 unknown [2018-06-22 09:09:39,936 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_2.smt2 [2018-06-22 09:09:39,940 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 09:09:39,954 INFO ]: Walking toolchain with 4 elements. [2018-06-22 09:09:39,954 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 09:09:39,954 INFO ]: Initializing ChcToBoogie... [2018-06-22 09:09:39,954 INFO ]: ChcToBoogie initialized [2018-06-22 09:09:39,958 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 09:09:39" (1/1) ... [2018-06-22 09:09:40,075 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 09:09:40 Unit [2018-06-22 09:09:40,075 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 09:09:40,075 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 09:09:40,075 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 09:09:40,075 INFO ]: Boogie Preprocessor initialized [2018-06-22 09:09:40,106 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 09:09:40" (1/1) ... [2018-06-22 09:09:40,106 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 09:09:40" (1/1) ... [2018-06-22 09:09:40,116 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 09:09:40" (1/1) ... [2018-06-22 09:09:40,116 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 09:09:40" (1/1) ... [2018-06-22 09:09:40,122 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 09:09:40" (1/1) ... [2018-06-22 09:09:40,124 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 09:09:40" (1/1) ... [2018-06-22 09:09:40,126 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 09:09:40" (1/1) ... [2018-06-22 09:09:40,130 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 09:09:40,130 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 09:09:40,130 INFO ]: Initializing RCFGBuilder... [2018-06-22 09:09:40,130 INFO ]: RCFGBuilder initialized [2018-06-22 09:09:40,131 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 09:09:40" (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 09:09:40,149 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 09:09:40,149 INFO ]: Found specification of procedure gotoProc [2018-06-22 09:09:40,149 INFO ]: Found implementation of procedure gotoProc [2018-06-22 09:09:40,149 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 09:09:40,149 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 09:09:40,149 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 09:09:40,538 INFO ]: Using library mode [2018-06-22 09:09:40,539 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 09:09:40 BoogieIcfgContainer [2018-06-22 09:09:40,539 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 09:09:40,540 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 09:09:40,540 INFO ]: Initializing TraceAbstraction... [2018-06-22 09:09:40,549 INFO ]: TraceAbstraction initialized [2018-06-22 09:09:40,550 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 09:09:39" (1/3) ... [2018-06-22 09:09:40,550 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f16a766 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 09:09:40, skipping insertion in model container [2018-06-22 09:09:40,551 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 09:09:40" (2/3) ... [2018-06-22 09:09:40,551 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f16a766 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 09:09:40, skipping insertion in model container [2018-06-22 09:09:40,551 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 09:09:40" (3/3) ... [2018-06-22 09:09:40,553 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 09:09:40,562 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 09:09:40,571 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 09:09:40,606 INFO ]: Using default assertion order modulation [2018-06-22 09:09:40,606 INFO ]: Interprodecural is true [2018-06-22 09:09:40,606 INFO ]: Hoare is false [2018-06-22 09:09:40,606 INFO ]: Compute interpolants for FPandBP [2018-06-22 09:09:40,606 INFO ]: Backedges is TWOTRACK [2018-06-22 09:09:40,606 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 09:09:40,606 INFO ]: Difference is false [2018-06-22 09:09:40,606 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 09:09:40,606 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 09:09:40,618 INFO ]: Start isEmpty. Operand 10 states. [2018-06-22 09:09:40,631 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-22 09:09:40,631 INFO ]: Found error trace [2018-06-22 09:09:40,632 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-22 09:09:40,632 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 09:09:40,637 INFO ]: Analyzing trace with hash 1284994894, now seen corresponding path program 1 times [2018-06-22 09:09:40,639 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 09:09:40,640 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 09:09:40,682 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 09:09:40,682 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 09:09:40,682 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 09:09:40,802 INFO ]: Conjunction of SSA is unsat [2018-06-22 09:09:40,905 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 09:09:40,907 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 09:09:40,907 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 09:09:40,908 INFO ]: Interpolant automaton has 3 states [2018-06-22 09:09:40,918 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 09:09:40,919 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 09:09:40,921 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-22 09:09:41,008 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 09:09:41,008 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-22 09:09:41,011 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 09:09:41,012 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-22 09:09:41,012 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 09:09:41,021 INFO ]: With dead ends: 9 [2018-06-22 09:09:41,021 INFO ]: Without dead ends: 9 [2018-06-22 09:09:41,022 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 09:09:41,034 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-22 09:09:41,048 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-22 09:09:41,049 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-22 09:09:41,050 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-22 09:09:41,051 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-22 09:09:41,051 INFO ]: Finished accepts. word is rejected. [2018-06-22 09:09:41,051 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-22 09:09:41,051 INFO ]: Interpolant automaton has 3 states. [2018-06-22 09:09:41,051 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-22 09:09:41,051 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 09:09:41,051 INFO ]: Found error trace [2018-06-22 09:09:41,051 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 09:09:41,051 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 09:09:41,051 INFO ]: Analyzing trace with hash 1180964567, now seen corresponding path program 1 times [2018-06-22 09:09:41,051 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 09:09:41,052 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 09:09:41,052 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 09:09:41,052 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 09:09:41,052 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 09:09:41,173 INFO ]: Conjunction of SSA is unsat [2018-06-22 09:09:41,394 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 09:09:41,395 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 09:09:41,395 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 09:09:41,403 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 09:09:41,540 INFO ]: Conjunction of SSA is unsat [2018-06-22 09:09:41,551 INFO ]: Computing forward predicates... [2018-06-22 09:09:41,896 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 09:09:41,931 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 09:09:41,931 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-06-22 09:09:41,931 INFO ]: Interpolant automaton has 6 states [2018-06-22 09:09:41,931 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 09:09:41,932 INFO ]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-06-22 09:09:41,932 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 6 states. [2018-06-22 09:09:42,103 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 09:09:42,104 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-22 09:09:42,105 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-22 09:09:42,105 INFO ]: Start accepts. Automaton has 6 states. Word has length 8 [2018-06-22 09:09:42,105 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 09:09:42,105 INFO ]: With dead ends: 11 [2018-06-22 09:09:42,105 INFO ]: Without dead ends: 11 [2018-06-22 09:09:42,106 INFO ]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-06-22 09:09:42,106 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-22 09:09:42,107 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-22 09:09:42,107 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-22 09:09:42,108 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-22 09:09:42,108 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-06-22 09:09:42,111 INFO ]: Finished accepts. word is rejected. [2018-06-22 09:09:42,111 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-22 09:09:42,111 INFO ]: Interpolant automaton has 6 states. [2018-06-22 09:09:42,111 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-22 09:09:42,111 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-22 09:09:42,111 INFO ]: Found error trace [2018-06-22 09:09:42,111 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 09:09:42,111 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 09:09:42,111 INFO ]: Analyzing trace with hash 1062095287, now seen corresponding path program 2 times [2018-06-22 09:09:42,111 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 09:09:42,112 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 09:09:42,112 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 09:09:42,112 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 09:09:42,112 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 09:09:42,280 INFO ]: Conjunction of SSA is unsat [2018-06-22 09:09:43,108 WARN ]: Spent 486.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 16 [2018-06-22 09:09:43,798 WARN ]: Spent 607.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 23 [2018-06-22 09:09:43,805 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 09:09:43,806 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 09:09:43,806 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 09:09:43,814 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 09:09:44,020 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 09:09:44,021 INFO ]: Conjunction of SSA is unsat [2018-06-22 09:09:44,030 INFO ]: Computing forward predicates... [2018-06-22 09:09:44,252 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 09:09:44,272 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 09:09:44,272 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2018-06-22 09:09:44,273 INFO ]: Interpolant automaton has 10 states [2018-06-22 09:09:44,273 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-22 09:09:44,273 INFO ]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2018-06-22 09:09:44,273 INFO ]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-06-22 09:09:44,393 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 09:09:44,393 INFO ]: Finished difference Result 13 states and 13 transitions. [2018-06-22 09:09:44,394 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 09:09:44,394 INFO ]: Start accepts. Automaton has 10 states. Word has length 10 [2018-06-22 09:09:44,394 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 09:09:44,394 INFO ]: With dead ends: 13 [2018-06-22 09:09:44,394 INFO ]: Without dead ends: 13 [2018-06-22 09:09:44,395 INFO ]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2018-06-22 09:09:44,395 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 09:09:44,396 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 09:09:44,396 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 09:09:44,397 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-06-22 09:09:44,397 INFO ]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-06-22 09:09:44,397 INFO ]: Finished accepts. word is rejected. [2018-06-22 09:09:44,397 INFO ]: Abstraction has 13 states and 13 transitions. [2018-06-22 09:09:44,397 INFO ]: Interpolant automaton has 10 states. [2018-06-22 09:09:44,397 INFO ]: Start isEmpty. Operand 13 states and 13 transitions. [2018-06-22 09:09:44,397 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-22 09:09:44,397 INFO ]: Found error trace [2018-06-22 09:09:44,397 INFO ]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 09:09:44,397 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 09:09:44,397 INFO ]: Analyzing trace with hash -1502133097, now seen corresponding path program 3 times [2018-06-22 09:09:44,397 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 09:09:44,397 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 09:09:44,399 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 09:09:44,399 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 09:09:44,399 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 09:09:44,728 INFO ]: Conjunction of SSA is unsat [2018-06-22 09:09:48,357 WARN ]: Spent 1.85 s on a formula simplification. DAG size of input: 268 DAG size of output: 18 [2018-06-22 09:09:50,273 WARN ]: Spent 1.72 s on a formula simplification. DAG size of input: 482 DAG size of output: 30 [2018-06-22 09:09:51,604 WARN ]: Spent 1.14 s on a formula simplification. DAG size of input: 502 DAG size of output: 39 [2018-06-22 09:09:53,730 WARN ]: Spent 1.93 s on a formula simplification. DAG size of input: 289 DAG size of output: 30 [2018-06-22 09:09:53,761 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 09:09:53,761 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 09:09:53,761 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 09:09:53,773 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 09:09:54,023 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 09:09:54,023 INFO ]: Conjunction of SSA is unsat [2018-06-22 09:09:54,037 INFO ]: Computing forward predicates... [2018-06-22 09:09:54,777 WARN ]: expecting exponential blowup for input size 9 [2018-06-22 09:09:55,035 WARN ]: expecting exponential blowup for input size 9 [2018-06-22 09:09:55,273 WARN ]: expecting exponential blowup for input size 9 [2018-06-22 09:09:55,561 WARN ]: expecting exponential blowup for input size 9 [2018-06-22 09:09:55,819 WARN ]: expecting exponential blowup for input size 9 [2018-06-22 09:09:56,054 WARN ]: expecting exponential blowup for input size 9 [2018-06-22 09:09:57,094 WARN ]: Spent 219.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 15 [2018-06-22 09:09:57,786 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 09:09:57,807 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 09:09:57,807 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2018-06-22 09:09:57,807 INFO ]: Interpolant automaton has 14 states [2018-06-22 09:09:57,807 INFO ]: Constructing interpolant automaton starting with 14 interpolants. [2018-06-22 09:09:57,807 INFO ]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2018-06-22 09:09:57,808 INFO ]: Start difference. First operand 13 states and 13 transitions. Second operand 14 states. [2018-06-22 09:09:58,323 WARN ]: Spent 225.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2018-06-22 09:09:58,421 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 09:09:58,422 INFO ]: Finished difference Result 15 states and 15 transitions. [2018-06-22 09:09:58,422 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 09:09:58,422 INFO ]: Start accepts. Automaton has 14 states. Word has length 12 [2018-06-22 09:09:58,422 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 09:09:58,422 INFO ]: With dead ends: 15 [2018-06-22 09:09:58,422 INFO ]: Without dead ends: 15 [2018-06-22 09:09:58,423 INFO ]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2018-06-22 09:09:58,423 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 09:09:58,424 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 09:09:58,424 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 09:09:58,425 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-06-22 09:09:58,425 INFO ]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-06-22 09:09:58,425 INFO ]: Finished accepts. word is rejected. [2018-06-22 09:09:58,425 INFO ]: Abstraction has 15 states and 15 transitions. [2018-06-22 09:09:58,425 INFO ]: Interpolant automaton has 14 states. [2018-06-22 09:09:58,425 INFO ]: Start isEmpty. Operand 15 states and 15 transitions. [2018-06-22 09:09:58,425 INFO ]: Finished isEmpty. Found accepting run of length 15 [2018-06-22 09:09:58,425 INFO ]: Found error trace [2018-06-22 09:09:58,425 INFO ]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 09:09:58,425 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 09:09:58,426 INFO ]: Analyzing trace with hash -414382217, now seen corresponding path program 4 times [2018-06-22 09:09:58,426 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 09:09:58,426 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 09:09:58,426 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 09:09:58,426 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 09:09:58,426 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 09:09:59,275 INFO ]: Conjunction of SSA is unsat Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown