java -Xss1g -Xmx4000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCHC.xml --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_No_Goto.epf -i /storage/chc-comp/vmt-chc-benchmarks/ctigar/nested2.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 15:13:59,226 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 15:13:59,229 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 15:13:59,240 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 15:13:59,240 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 15:13:59,241 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 15:13:59,242 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 15:13:59,244 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 15:13:59,246 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 15:13:59,246 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 15:13:59,252 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 15:13:59,252 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 15:13:59,253 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 15:13:59,254 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 15:13:59,255 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 15:13:59,256 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 15:13:59,257 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 15:13:59,259 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 15:13:59,260 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 15:13:59,261 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 15:13:59,262 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 15:13:59,264 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 15:13:59,264 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 15:13:59,264 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 15:13:59,268 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 15:13:59,269 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 15:13:59,270 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 15:13:59,271 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 15:13:59,271 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 15:13:59,272 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 15:13:59,272 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 15:13:59,273 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 15:13:59,273 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 15:13:59,274 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 15:13:59,274 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 15:13:59,275 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 15:13:59,295 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 15:13:59,295 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 15:13:59,295 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 15:13:59,296 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 15:13:59,300 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 15:13:59,300 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 15:13:59,300 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 15:13:59,301 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 15:13:59,301 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 15:13:59,301 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 15:13:59,301 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 15:13:59,301 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 15:13:59,302 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 15:13:59,302 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 15:13:59,302 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 15:13:59,302 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 15:13:59,302 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 15:13:59,302 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 15:13:59,303 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 15:13:59,305 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 15:13:59,305 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 15:13:59,350 INFO ]: Repository-Root is: /tmp [2018-06-22 15:13:59,363 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 15:13:59,369 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 15:13:59,370 INFO ]: Initializing SmtParser... [2018-06-22 15:13:59,371 INFO ]: SmtParser initialized [2018-06-22 15:13:59,371 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/nested2.c.smt2 [2018-06-22 15:13:59,373 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 15:13:59,466 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/nested2.c.smt2 unknown [2018-06-22 15:13:59,701 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/nested2.c.smt2 [2018-06-22 15:13:59,706 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 15:13:59,712 INFO ]: Walking toolchain with 4 elements. [2018-06-22 15:13:59,712 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 15:13:59,712 INFO ]: Initializing ChcToBoogie... [2018-06-22 15:13:59,712 INFO ]: ChcToBoogie initialized [2018-06-22 15:13:59,715 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 03:13:59" (1/1) ... [2018-06-22 15:13:59,759 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:13:59 Unit [2018-06-22 15:13:59,759 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 15:13:59,759 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 15:13:59,759 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 15:13:59,759 INFO ]: Boogie Preprocessor initialized [2018-06-22 15:13:59,781 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:13:59" (1/1) ... [2018-06-22 15:13:59,782 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:13:59" (1/1) ... [2018-06-22 15:13:59,790 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:13:59" (1/1) ... [2018-06-22 15:13:59,790 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:13:59" (1/1) ... [2018-06-22 15:13:59,803 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:13:59" (1/1) ... [2018-06-22 15:13:59,805 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:13:59" (1/1) ... [2018-06-22 15:13:59,806 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:13:59" (1/1) ... [2018-06-22 15:13:59,807 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 15:13:59,808 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 15:13:59,808 INFO ]: Initializing RCFGBuilder... [2018-06-22 15:13:59,808 INFO ]: RCFGBuilder initialized [2018-06-22 15:13:59,809 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:13:59" (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) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 15:13:59,829 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 15:13:59,829 INFO ]: Found specification of procedure False [2018-06-22 15:13:59,829 INFO ]: Found implementation of procedure False [2018-06-22 15:13:59,829 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 15:13:59,829 INFO ]: Found specification of procedure state [2018-06-22 15:13:59,829 INFO ]: Found implementation of procedure state [2018-06-22 15:13:59,829 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 15:13:59,829 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 15:13:59,829 INFO ]: Found implementation of procedure Ultimate.START [2018-06-22 15:14:00,069 INFO ]: Using library mode [2018-06-22 15:14:00,069 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 03:14:00 BoogieIcfgContainer [2018-06-22 15:14:00,069 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 15:14:00,071 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 15:14:00,071 INFO ]: Initializing TraceAbstraction... [2018-06-22 15:14:00,074 INFO ]: TraceAbstraction initialized [2018-06-22 15:14:00,074 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 03:13:59" (1/3) ... [2018-06-22 15:14:00,075 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b4aa00c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 03:14:00, skipping insertion in model container [2018-06-22 15:14:00,075 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:13:59" (2/3) ... [2018-06-22 15:14:00,075 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b4aa00c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 03:14:00, skipping insertion in model container [2018-06-22 15:14:00,075 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 03:14:00" (3/3) ... [2018-06-22 15:14:00,077 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 15:14:00,086 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 15:14:00,094 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 15:14:00,137 INFO ]: Using default assertion order modulation [2018-06-22 15:14:00,137 INFO ]: Interprodecural is true [2018-06-22 15:14:00,137 INFO ]: Hoare is false [2018-06-22 15:14:00,137 INFO ]: Compute interpolants for FPandBP [2018-06-22 15:14:00,137 INFO ]: Backedges is TWOTRACK [2018-06-22 15:14:00,137 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 15:14:00,137 INFO ]: Difference is false [2018-06-22 15:14:00,137 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 15:14:00,137 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 15:14:00,150 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 15:14:00,163 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 15:14:00,163 INFO ]: Found error trace [2018-06-22 15:14:00,164 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:14:00,164 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:14:00,168 INFO ]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times [2018-06-22 15:14:00,169 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:14:00,169 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:14:00,200 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:14:00,200 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:14:00,200 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:14:00,224 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:14:00,310 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 15:14:00,311 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 15:14:00,312 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 15:14:00,313 INFO ]: Interpolant automaton has 4 states [2018-06-22 15:14:00,324 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 15:14:00,324 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 15:14:00,326 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 15:14:00,413 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:14:00,413 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 15:14:00,414 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 15:14:00,415 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 15:14:00,415 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:14:00,425 INFO ]: With dead ends: 13 [2018-06-22 15:14:00,425 INFO ]: Without dead ends: 13 [2018-06-22 15:14:00,426 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 15:14:00,438 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 15:14:00,457 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 15:14:00,458 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 15:14:00,458 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 15:14:00,460 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 15:14:00,460 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:14:00,460 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 15:14:00,460 INFO ]: Interpolant automaton has 4 states. [2018-06-22 15:14:00,460 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 15:14:00,461 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 15:14:00,461 INFO ]: Found error trace [2018-06-22 15:14:00,461 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:14:00,461 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:14:00,462 INFO ]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times [2018-06-22 15:14:00,462 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:14:00,462 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:14:00,462 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:14:00,462 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:14:00,462 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:14:00,503 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:14:00,737 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 15:14:00,737 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:14:00,737 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 15:14:00,744 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:14:00,780 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:14:00,787 INFO ]: Computing forward predicates... [2018-06-22 15:14:01,104 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 15:14:01,138 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:14:01,138 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-06-22 15:14:01,138 INFO ]: Interpolant automaton has 6 states [2018-06-22 15:14:01,139 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 15:14:01,139 INFO ]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-06-22 15:14:01,139 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 6 states. [2018-06-22 15:14:01,297 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:14:01,297 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 15:14:01,298 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 15:14:01,298 INFO ]: Start accepts. Automaton has 6 states. Word has length 13 [2018-06-22 15:14:01,298 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:14:01,299 INFO ]: With dead ends: 15 [2018-06-22 15:14:01,299 INFO ]: Without dead ends: 15 [2018-06-22 15:14:01,299 INFO ]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-06-22 15:14:01,300 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 15:14:01,304 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 15:14:01,304 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 15:14:01,305 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 15:14:01,305 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 15:14:01,305 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:14:01,305 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 15:14:01,305 INFO ]: Interpolant automaton has 6 states. [2018-06-22 15:14:01,305 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 15:14:01,306 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 15:14:01,306 INFO ]: Found error trace [2018-06-22 15:14:01,306 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:14:01,306 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:14:01,306 INFO ]: Analyzing trace with hash -1649658231, now seen corresponding path program 2 times [2018-06-22 15:14:01,306 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:14:01,306 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:14:01,307 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:14:01,307 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:14:01,307 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:14:01,377 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:14:01,861 WARN ]: Spent 188.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 12 [2018-06-22 15:14:02,013 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 15:14:02,013 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:14:02,013 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 15:14:02,021 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 15:14:02,074 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 15:14:02,075 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:14:02,077 INFO ]: Computing forward predicates... [2018-06-22 15:14:02,383 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 15:14:02,414 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:14:02,414 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-06-22 15:14:02,415 INFO ]: Interpolant automaton has 8 states [2018-06-22 15:14:02,415 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 15:14:02,415 INFO ]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-06-22 15:14:02,415 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 8 states. [2018-06-22 15:14:02,936 WARN ]: Spent 223.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 13 [2018-06-22 15:14:03,010 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:14:03,010 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 15:14:03,011 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 15:14:03,011 INFO ]: Start accepts. Automaton has 8 states. Word has length 17 [2018-06-22 15:14:03,011 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:14:03,011 INFO ]: With dead ends: 17 [2018-06-22 15:14:03,011 INFO ]: Without dead ends: 17 [2018-06-22 15:14:03,012 INFO ]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2018-06-22 15:14:03,012 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 15:14:03,015 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 15:14:03,015 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 15:14:03,015 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 15:14:03,015 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 15:14:03,016 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:14:03,016 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 15:14:03,016 INFO ]: Interpolant automaton has 8 states. [2018-06-22 15:14:03,016 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 15:14:03,016 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 15:14:03,016 INFO ]: Found error trace [2018-06-22 15:14:03,016 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:14:03,017 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:14:03,017 INFO ]: Analyzing trace with hash 2119922091, now seen corresponding path program 3 times [2018-06-22 15:14:03,017 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:14:03,017 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:14:03,018 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:14:03,018 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:14:03,018 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:14:03,050 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:14:03,356 WARN ]: Spent 105.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2018-06-22 15:14:03,609 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 15:14:03,609 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:14:03,609 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 15:14:03,621 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 15:14:03,679 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 15:14:03,679 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:14:03,683 INFO ]: Computing forward predicates... [2018-06-22 15:14:03,892 WARN ]: Spent 121.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 14 [2018-06-22 15:14:04,075 WARN ]: Spent 108.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2018-06-22 15:14:04,675 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 15:14:04,706 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:14:04,706 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2018-06-22 15:14:04,706 INFO ]: Interpolant automaton has 14 states [2018-06-22 15:14:04,707 INFO ]: Constructing interpolant automaton starting with 14 interpolants. [2018-06-22 15:14:04,707 INFO ]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2018-06-22 15:14:04,707 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 14 states. [2018-06-22 15:14:04,934 WARN ]: Spent 138.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2018-06-22 15:14:05,262 WARN ]: Spent 102.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2018-06-22 15:14:05,279 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:14:05,279 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-22 15:14:05,280 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 15:14:05,280 INFO ]: Start accepts. Automaton has 14 states. Word has length 21 [2018-06-22 15:14:05,280 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:14:05,281 INFO ]: With dead ends: 19 [2018-06-22 15:14:05,281 INFO ]: Without dead ends: 19 [2018-06-22 15:14:05,281 INFO ]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2018-06-22 15:14:05,281 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 15:14:05,284 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 15:14:05,284 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 15:14:05,285 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-22 15:14:05,285 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-22 15:14:05,285 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:14:05,285 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-22 15:14:05,285 INFO ]: Interpolant automaton has 14 states. [2018-06-22 15:14:05,285 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-22 15:14:05,286 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 15:14:05,286 INFO ]: Found error trace [2018-06-22 15:14:05,286 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:14:05,286 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:14:05,286 INFO ]: Analyzing trace with hash 1762711629, now seen corresponding path program 4 times [2018-06-22 15:14:05,286 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:14:05,286 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:14:05,287 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:14:05,287 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:14:05,287 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:14:05,321 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:14:05,586 WARN ]: Spent 123.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2018-06-22 15:14:05,762 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 15:14:05,762 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:14:05,762 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 15:14:05,776 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 15:14:05,805 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 15:14:05,805 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:14:05,809 INFO ]: Computing forward predicates... [2018-06-22 15:14:06,134 WARN ]: Spent 243.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 20 [2018-06-22 15:14:06,339 WARN ]: Spent 168.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 24 [2018-06-22 15:14:06,637 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 15:14:06,656 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:14:06,656 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2018-06-22 15:14:06,656 INFO ]: Interpolant automaton has 15 states [2018-06-22 15:14:06,656 INFO ]: Constructing interpolant automaton starting with 15 interpolants. [2018-06-22 15:14:06,656 INFO ]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2018-06-22 15:14:06,656 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 15 states. [2018-06-22 15:14:06,902 WARN ]: Spent 214.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2018-06-22 15:14:07,275 WARN ]: Spent 184.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 33 [2018-06-22 15:14:07,423 WARN ]: Spent 115.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2018-06-22 15:14:07,470 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:14:07,470 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-22 15:14:07,471 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 15:14:07,471 INFO ]: Start accepts. Automaton has 15 states. Word has length 25 [2018-06-22 15:14:07,471 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:14:07,472 INFO ]: With dead ends: 21 [2018-06-22 15:14:07,472 INFO ]: Without dead ends: 21 [2018-06-22 15:14:07,472 INFO ]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2018-06-22 15:14:07,472 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-22 15:14:07,475 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-22 15:14:07,475 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-22 15:14:07,475 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-22 15:14:07,476 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 25 [2018-06-22 15:14:07,476 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:14:07,476 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-22 15:14:07,476 INFO ]: Interpolant automaton has 15 states. [2018-06-22 15:14:07,476 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-22 15:14:07,477 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 15:14:07,477 INFO ]: Found error trace [2018-06-22 15:14:07,477 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:14:07,478 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:14:07,478 INFO ]: Analyzing trace with hash 853117551, now seen corresponding path program 5 times [2018-06-22 15:14:07,478 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:14:07,478 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:14:07,478 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:14:07,479 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:14:07,479 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:14:07,521 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:14:07,708 WARN ]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2018-06-22 15:14:08,254 WARN ]: Spent 498.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 17 [2018-06-22 15:14:08,457 WARN ]: Spent 132.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 23 [2018-06-22 15:14:08,677 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 15:14:08,677 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:14:08,677 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:14:08,692 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 15:14:08,799 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-06-22 15:14:08,799 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:14:08,803 INFO ]: Computing forward predicates... [2018-06-22 15:14:09,167 WARN ]: Spent 200.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2018-06-22 15:14:09,827 WARN ]: Spent 215.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 20 [2018-06-22 15:14:10,390 INFO ]: Checked inductivity of 55 backedges. 1 proven. 39 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 15:14:10,409 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:14:10,409 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2018-06-22 15:14:10,410 INFO ]: Interpolant automaton has 22 states [2018-06-22 15:14:10,410 INFO ]: Constructing interpolant automaton starting with 22 interpolants. [2018-06-22 15:14:10,410 INFO ]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2018-06-22 15:14:10,410 INFO ]: Start difference. First operand 21 states and 22 transitions. Second operand 22 states. [2018-06-22 15:14:10,665 WARN ]: Spent 212.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2018-06-22 15:14:11,110 WARN ]: Spent 308.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 25 [2018-06-22 15:14:11,303 WARN ]: Spent 173.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 35 [2018-06-22 15:14:11,670 WARN ]: Spent 225.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2018-06-22 15:14:11,697 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:14:11,697 INFO ]: Finished difference Result 23 states and 24 transitions. [2018-06-22 15:14:11,698 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 15:14:11,698 INFO ]: Start accepts. Automaton has 22 states. Word has length 29 [2018-06-22 15:14:11,698 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:14:11,699 INFO ]: With dead ends: 23 [2018-06-22 15:14:11,699 INFO ]: Without dead ends: 23 [2018-06-22 15:14:11,699 INFO ]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=166, Invalid=646, Unknown=0, NotChecked=0, Total=812 [2018-06-22 15:14:11,699 INFO ]: Start minimizeSevpa. Operand 23 states. [2018-06-22 15:14:11,702 INFO ]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-06-22 15:14:11,702 INFO ]: Start removeUnreachable. Operand 23 states. [2018-06-22 15:14:11,703 INFO ]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-06-22 15:14:11,703 INFO ]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 29 [2018-06-22 15:14:11,703 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:14:11,703 INFO ]: Abstraction has 23 states and 24 transitions. [2018-06-22 15:14:11,703 INFO ]: Interpolant automaton has 22 states. [2018-06-22 15:14:11,703 INFO ]: Start isEmpty. Operand 23 states and 24 transitions. [2018-06-22 15:14:11,704 INFO ]: Finished isEmpty. Found accepting run of length 34 [2018-06-22 15:14:11,704 INFO ]: Found error trace [2018-06-22 15:14:11,704 INFO ]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:14:11,704 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:14:11,704 INFO ]: Analyzing trace with hash -1661294575, now seen corresponding path program 6 times [2018-06-22 15:14:11,704 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:14:11,704 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:14:11,705 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:14:11,705 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:14:11,705 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:14:11,775 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:14:12,589 WARN ]: Spent 582.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-06-22 15:14:13,378 WARN ]: Spent 706.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2018-06-22 15:14:13,783 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 15:14:13,783 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:14:13,837 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:14:13,843 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 15:14:13,902 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-06-22 15:14:13,902 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:14:13,907 INFO ]: Computing forward predicates... [2018-06-22 15:14:21,410 WARN ]: Spent 6.69 s on a formula simplification. DAG size of input: 643 DAG size of output: 78 [2018-06-22 15:14:23,712 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 15:14:23,745 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:14:23,745 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 25 [2018-06-22 15:14:23,745 INFO ]: Interpolant automaton has 25 states [2018-06-22 15:14:23,745 INFO ]: Constructing interpolant automaton starting with 25 interpolants. [2018-06-22 15:14:23,745 INFO ]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2018-06-22 15:14:23,746 INFO ]: Start difference. First operand 23 states and 24 transitions. Second operand 25 states. [2018-06-22 15:14:24,469 WARN ]: Spent 670.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 74 [2018-06-22 15:14:24,840 WARN ]: Spent 331.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 33 [2018-06-22 15:14:25,211 WARN ]: Spent 332.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 39 [2018-06-22 15:14:25,659 WARN ]: Spent 416.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 57 [2018-06-22 15:14:26,206 WARN ]: Spent 401.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 45 [2018-06-22 15:14:26,735 WARN ]: Spent 496.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 52 [2018-06-22 15:14:27,204 WARN ]: Spent 431.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 66 [2018-06-22 15:14:27,237 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:14:27,237 INFO ]: Finished difference Result 25 states and 26 transitions. [2018-06-22 15:14:27,237 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-22 15:14:27,238 INFO ]: Start accepts. Automaton has 25 states. Word has length 33 [2018-06-22 15:14:27,238 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:14:27,238 INFO ]: With dead ends: 25 [2018-06-22 15:14:27,238 INFO ]: Without dead ends: 25 [2018-06-22 15:14:27,239 INFO ]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=174, Invalid=818, Unknown=0, NotChecked=0, Total=992 [2018-06-22 15:14:27,239 INFO ]: Start minimizeSevpa. Operand 25 states. [2018-06-22 15:14:27,243 INFO ]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-06-22 15:14:27,243 INFO ]: Start removeUnreachable. Operand 25 states. [2018-06-22 15:14:27,244 INFO ]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-06-22 15:14:27,244 INFO ]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 33 [2018-06-22 15:14:27,244 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:14:27,244 INFO ]: Abstraction has 25 states and 26 transitions. [2018-06-22 15:14:27,244 INFO ]: Interpolant automaton has 25 states. [2018-06-22 15:14:27,244 INFO ]: Start isEmpty. Operand 25 states and 26 transitions. [2018-06-22 15:14:27,245 INFO ]: Finished isEmpty. Found accepting run of length 38 [2018-06-22 15:14:27,245 INFO ]: Found error trace [2018-06-22 15:14:27,245 INFO ]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:14:27,245 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:14:27,245 INFO ]: Analyzing trace with hash -1494134477, now seen corresponding path program 7 times [2018-06-22 15:14:27,245 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:14:27,245 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:14:27,246 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:14:27,246 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:14:27,246 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:14:27,319 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:14:27,582 WARN ]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2018-06-22 15:14:27,899 WARN ]: Spent 269.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 17 [2018-06-22 15:14:28,126 WARN ]: Spent 152.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2018-06-22 15:14:28,669 INFO ]: Checked inductivity of 105 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-22 15:14:28,669 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:14:28,669 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:14:28,675 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:14:28,715 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:14:28,720 INFO ]: Computing forward predicates... [2018-06-22 15:14:34,258 WARN ]: Spent 139.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 24 [2018-06-22 15:14:34,907 WARN ]: Spent 435.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 34 [2018-06-22 15:14:36,208 INFO ]: Checked inductivity of 105 backedges. 1 proven. 76 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-22 15:14:36,228 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:14:36,228 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2018-06-22 15:14:36,228 INFO ]: Interpolant automaton has 28 states [2018-06-22 15:14:36,228 INFO ]: Constructing interpolant automaton starting with 28 interpolants. [2018-06-22 15:14:36,229 INFO ]: CoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2018-06-22 15:14:36,229 INFO ]: Start difference. First operand 25 states and 26 transitions. Second operand 28 states. [2018-06-22 15:14:36,512 WARN ]: Spent 247.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2018-06-22 15:14:36,657 WARN ]: Spent 115.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 21 [2018-06-22 15:14:36,843 WARN ]: Spent 165.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 32 [2018-06-22 15:14:37,156 WARN ]: Spent 285.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 43 [2018-06-22 15:14:37,385 WARN ]: Spent 191.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 40 [2018-06-22 15:14:37,701 WARN ]: Spent 289.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 45 [2018-06-22 15:14:37,970 WARN ]: Spent 243.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 36 [2018-06-22 15:14:38,423 WARN ]: Spent 426.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2018-06-22 15:14:38,451 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:14:38,451 INFO ]: Finished difference Result 27 states and 28 transitions. [2018-06-22 15:14:38,452 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-06-22 15:14:38,452 INFO ]: Start accepts. Automaton has 28 states. Word has length 37 [2018-06-22 15:14:38,452 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:14:38,453 INFO ]: With dead ends: 27 [2018-06-22 15:14:38,453 INFO ]: Without dead ends: 27 [2018-06-22 15:14:38,453 INFO ]: 0 DeclaredPredicates, 62 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=247, Invalid=1013, Unknown=0, NotChecked=0, Total=1260 [2018-06-22 15:14:38,453 INFO ]: Start minimizeSevpa. Operand 27 states. [2018-06-22 15:14:38,456 INFO ]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-06-22 15:14:38,456 INFO ]: Start removeUnreachable. Operand 27 states. [2018-06-22 15:14:38,457 INFO ]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-06-22 15:14:38,457 INFO ]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 37 [2018-06-22 15:14:38,457 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:14:38,457 INFO ]: Abstraction has 27 states and 28 transitions. [2018-06-22 15:14:38,457 INFO ]: Interpolant automaton has 28 states. [2018-06-22 15:14:38,457 INFO ]: Start isEmpty. Operand 27 states and 28 transitions. [2018-06-22 15:14:38,458 INFO ]: Finished isEmpty. Found accepting run of length 42 [2018-06-22 15:14:38,458 INFO ]: Found error trace [2018-06-22 15:14:38,458 INFO ]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:14:38,458 INFO ]: === Iteration 9 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:14:38,459 INFO ]: Analyzing trace with hash 1618126293, now seen corresponding path program 8 times [2018-06-22 15:14:38,459 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:14:38,459 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:14:38,459 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:14:38,459 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:14:38,459 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:14:38,501 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:14:39,384 INFO ]: Checked inductivity of 136 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-06-22 15:14:39,384 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:14:39,384 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:14:39,390 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 15:14:39,431 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 15:14:39,431 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:14:39,435 INFO ]: Computing forward predicates... [2018-06-22 15:14:43,611 WARN ]: Spent 156.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2018-06-22 15:14:44,478 INFO ]: Checked inductivity of 136 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-06-22 15:14:44,498 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:14:44,498 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 32 [2018-06-22 15:14:44,499 INFO ]: Interpolant automaton has 32 states [2018-06-22 15:14:44,499 INFO ]: Constructing interpolant automaton starting with 32 interpolants. [2018-06-22 15:14:44,499 INFO ]: CoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2018-06-22 15:14:44,499 INFO ]: Start difference. First operand 27 states and 28 transitions. Second operand 32 states. [2018-06-22 15:14:45,207 WARN ]: Spent 671.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2018-06-22 15:14:45,397 WARN ]: Spent 131.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 21 [2018-06-22 15:14:45,676 WARN ]: Spent 252.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 33 [2018-06-22 15:14:45,926 WARN ]: Spent 221.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 37 [2018-06-22 15:14:46,241 WARN ]: Spent 287.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 38 [2018-06-22 15:14:46,506 WARN ]: Spent 236.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 36 [2018-06-22 15:14:46,901 WARN ]: Spent 355.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 46 [2018-06-22 15:14:47,204 WARN ]: Spent 270.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 36 [2018-06-22 15:14:47,740 WARN ]: Spent 499.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2018-06-22 15:14:47,772 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:14:47,772 INFO ]: Finished difference Result 29 states and 30 transitions. [2018-06-22 15:14:47,772 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-06-22 15:14:47,772 INFO ]: Start accepts. Automaton has 32 states. Word has length 41 [2018-06-22 15:14:47,772 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:14:47,773 INFO ]: With dead ends: 29 [2018-06-22 15:14:47,773 INFO ]: Without dead ends: 29 [2018-06-22 15:14:47,773 INFO ]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=301, Invalid=1339, Unknown=0, NotChecked=0, Total=1640 [2018-06-22 15:14:47,773 INFO ]: Start minimizeSevpa. Operand 29 states. [2018-06-22 15:14:47,778 INFO ]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-06-22 15:14:47,778 INFO ]: Start removeUnreachable. Operand 29 states. [2018-06-22 15:14:47,779 INFO ]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-06-22 15:14:47,779 INFO ]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 41 [2018-06-22 15:14:47,779 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:14:47,779 INFO ]: Abstraction has 29 states and 30 transitions. [2018-06-22 15:14:47,779 INFO ]: Interpolant automaton has 32 states. [2018-06-22 15:14:47,779 INFO ]: Start isEmpty. Operand 29 states and 30 transitions. [2018-06-22 15:14:47,780 INFO ]: Finished isEmpty. Found accepting run of length 46 [2018-06-22 15:14:47,780 INFO ]: Found error trace [2018-06-22 15:14:47,780 INFO ]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:14:47,780 INFO ]: === Iteration 10 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:14:47,780 INFO ]: Analyzing trace with hash 996918775, now seen corresponding path program 9 times [2018-06-22 15:14:47,780 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:14:47,780 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:14:47,781 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:14:47,781 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:14:47,781 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:14:47,861 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:14:48,639 WARN ]: Spent 519.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-06-22 15:14:49,282 INFO ]: Checked inductivity of 171 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-06-22 15:14:49,283 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:14:49,283 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:14:49,288 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 15:14:49,359 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-06-22 15:14:49,359 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:14:49,366 INFO ]: Computing forward predicates... [2018-06-22 15:14:53,839 WARN ]: Spent 4.01 s on a formula simplification. DAG size of input: 735 DAG size of output: 67 [2018-06-22 15:14:54,105 WARN ]: Spent 215.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 28 [2018-06-22 15:14:54,296 WARN ]: Spent 142.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2018-06-22 15:14:54,819 WARN ]: Spent 436.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 34 [2018-06-22 15:14:55,513 WARN ]: Spent 457.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 30 [2018-06-22 15:14:56,419 INFO ]: Checked inductivity of 171 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-06-22 15:14:56,438 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:14:56,439 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 35 [2018-06-22 15:14:56,439 INFO ]: Interpolant automaton has 35 states [2018-06-22 15:14:56,439 INFO ]: Constructing interpolant automaton starting with 35 interpolants. [2018-06-22 15:14:56,439 INFO ]: CoverageRelationStatistics Valid=109, Invalid=1081, Unknown=0, NotChecked=0, Total=1190 [2018-06-22 15:14:56,440 INFO ]: Start difference. First operand 29 states and 30 transitions. Second operand 35 states. [2018-06-22 15:14:57,663 WARN ]: Spent 1.14 s on a formula simplification. DAG size of input: 159 DAG size of output: 103 [2018-06-22 15:14:58,414 WARN ]: Spent 622.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 25 Received shutdown request... [2018-06-22 15:14:59,092 WARN ]: Removed 10 from assertion stack [2018-06-22 15:14:59,092 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 15:14:59,092 WARN ]: Verification canceled [2018-06-22 15:14:59,095 WARN ]: Timeout [2018-06-22 15:14:59,095 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 03:14:59 BoogieIcfgContainer [2018-06-22 15:14:59,095 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 15:14:59,096 INFO ]: Toolchain (without parser) took 59389.58 ms. Allocated memory was 308.3 MB in the beginning and 1.2 GB in the end (delta: 855.6 MB). Free memory was 262.8 MB in the beginning and 267.6 MB in the end (delta: -4.8 MB). Peak memory consumption was 850.8 MB. Max. memory is 3.6 GB. [2018-06-22 15:14:59,096 INFO ]: SmtParser took 0.06 ms. Allocated memory is still 308.3 MB. Free memory is still 272.9 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 15:14:59,097 INFO ]: ChcToBoogie took 46.89 ms. Allocated memory is still 308.3 MB. Free memory is still 260.8 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 15:14:59,097 INFO ]: Boogie Preprocessor took 48.06 ms. Allocated memory is still 308.3 MB. Free memory was 260.8 MB in the beginning and 258.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 15:14:59,097 INFO ]: RCFGBuilder took 261.45 ms. Allocated memory is still 308.3 MB. Free memory was 258.8 MB in the beginning and 250.8 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 3.6 GB. [2018-06-22 15:14:59,098 INFO ]: TraceAbstraction took 59024.38 ms. Allocated memory was 308.3 MB in the beginning and 1.2 GB in the end (delta: 855.6 MB). Free memory was 248.9 MB in the beginning and 267.6 MB in the end (delta: -18.8 MB). Peak memory consumption was 836.9 MB. Max. memory is 3.6 GB. [2018-06-22 15:14:59,100 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.06 ms. Allocated memory is still 308.3 MB. Free memory is still 272.9 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 46.89 ms. Allocated memory is still 308.3 MB. Free memory is still 260.8 MB. There was no memory consumed. Max. memory is 3.6 GB. * Boogie Preprocessor took 48.06 ms. Allocated memory is still 308.3 MB. Free memory was 260.8 MB in the beginning and 258.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 261.45 ms. Allocated memory is still 308.3 MB. Free memory was 258.8 MB in the beginning and 250.8 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 59024.38 ms. Allocated memory was 308.3 MB in the beginning and 1.2 GB in the end (delta: 855.6 MB). Free memory was 248.9 MB in the beginning and 267.6 MB in the end (delta: -18.8 MB). Peak memory consumption was 836.9 MB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [UNKNOWN] : Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 0). Cancelled while BasicCegarLoop was constructing difference of abstraction (29states) and interpolant automaton (currently 6 states, 35 states before enhancement), while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 154. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 58.9s OverallTime, 10 OverallIterations, 10 TraceHistogramMax, 15.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 125 SDtfs, 370 SDslu, 793 SDs, 0 SdLazy, 710 SolverSat, 462 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 429 GetRequests, 196 SyntacticMatches, 17 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 39.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 42.2s InterpolantComputationTime, 531 NumberOfCodeBlocks, 531 NumberOfCodeBlocksAsserted, 44 NumberOfCheckSat, 512 ConstructedInterpolants, 0 QuantifiedInterpolants, 4265048 SizeOfPredicates, 567 NumberOfNonLiveVariables, 1863 ConjunctsInSsa, 438 ConjunctsInUnsatCore, 19 InterpolantComputations, 1 PerfectInterpolantSequences, 332/1230 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/nested2.c.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_15-14-59-111.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/nested2.c.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_15-14-59-111.csv Completed graceful shutdown