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/id_build.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 15:09:06,302 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 15:09:06,305 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 15:09:06,317 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 15:09:06,318 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 15:09:06,318 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 15:09:06,320 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 15:09:06,322 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 15:09:06,324 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 15:09:06,325 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 15:09:06,325 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 15:09:06,326 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 15:09:06,326 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 15:09:06,328 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 15:09:06,329 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 15:09:06,330 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 15:09:06,332 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 15:09:06,333 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 15:09:06,335 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 15:09:06,336 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 15:09:06,337 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 15:09:06,339 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 15:09:06,339 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 15:09:06,340 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 15:09:06,340 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 15:09:06,341 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 15:09:06,342 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 15:09:06,343 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 15:09:06,344 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 15:09:06,344 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 15:09:06,345 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 15:09:06,345 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 15:09:06,346 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 15:09:06,347 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 15:09:06,347 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 15:09:06,348 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 15:09:06,361 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 15:09:06,361 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 15:09:06,361 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 15:09:06,362 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 15:09:06,362 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 15:09:06,363 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 15:09:06,363 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 15:09:06,363 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 15:09:06,363 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 15:09:06,364 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 15:09:06,364 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 15:09:06,364 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 15:09:06,364 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 15:09:06,364 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 15:09:06,365 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 15:09:06,365 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 15:09:06,365 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 15:09:06,365 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 15:09:06,365 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 15:09:06,367 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 15:09:06,367 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 15:09:06,408 INFO ]: Repository-Root is: /tmp [2018-06-22 15:09:06,427 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 15:09:06,431 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 15:09:06,433 INFO ]: Initializing SmtParser... [2018-06-22 15:09:06,433 INFO ]: SmtParser initialized [2018-06-22 15:09:06,433 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/id_build.c.smt2 [2018-06-22 15:09:06,435 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 15:09:06,527 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/id_build.c.smt2 unknown [2018-06-22 15:09:06,744 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/id_build.c.smt2 [2018-06-22 15:09:06,749 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 15:09:06,755 INFO ]: Walking toolchain with 4 elements. [2018-06-22 15:09:06,756 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 15:09:06,756 INFO ]: Initializing ChcToBoogie... [2018-06-22 15:09:06,756 INFO ]: ChcToBoogie initialized [2018-06-22 15:09:06,759 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 03:09:06" (1/1) ... [2018-06-22 15:09:06,808 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:09:06 Unit [2018-06-22 15:09:06,808 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 15:09:06,810 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 15:09:06,810 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 15:09:06,811 INFO ]: Boogie Preprocessor initialized [2018-06-22 15:09:06,833 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:09:06" (1/1) ... [2018-06-22 15:09:06,833 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:09:06" (1/1) ... [2018-06-22 15:09:06,841 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:09:06" (1/1) ... [2018-06-22 15:09:06,841 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:09:06" (1/1) ... [2018-06-22 15:09:06,855 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:09:06" (1/1) ... [2018-06-22 15:09:06,856 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:09:06" (1/1) ... [2018-06-22 15:09:06,857 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:09:06" (1/1) ... [2018-06-22 15:09:06,859 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 15:09:06,860 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 15:09:06,860 INFO ]: Initializing RCFGBuilder... [2018-06-22 15:09:06,860 INFO ]: RCFGBuilder initialized [2018-06-22 15:09:06,861 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:09:06" (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 15:09:06,881 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 15:09:06,881 INFO ]: Found specification of procedure False [2018-06-22 15:09:06,881 INFO ]: Found implementation of procedure False [2018-06-22 15:09:06,881 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 15:09:06,881 INFO ]: Found specification of procedure state [2018-06-22 15:09:06,881 INFO ]: Found implementation of procedure state [2018-06-22 15:09:06,881 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 15:09:06,881 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 15:09:06,881 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 15:09:07,155 INFO ]: Using library mode [2018-06-22 15:09:07,156 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 03:09:07 BoogieIcfgContainer [2018-06-22 15:09:07,156 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 15:09:07,158 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 15:09:07,158 INFO ]: Initializing TraceAbstraction... [2018-06-22 15:09:07,161 INFO ]: TraceAbstraction initialized [2018-06-22 15:09:07,161 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 03:09:06" (1/3) ... [2018-06-22 15:09:07,162 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@349f3fd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 03:09:07, skipping insertion in model container [2018-06-22 15:09:07,162 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:09:06" (2/3) ... [2018-06-22 15:09:07,162 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@349f3fd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 03:09:07, skipping insertion in model container [2018-06-22 15:09:07,162 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 03:09:07" (3/3) ... [2018-06-22 15:09:07,164 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 15:09:07,173 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 15:09:07,180 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 15:09:07,233 INFO ]: Using default assertion order modulation [2018-06-22 15:09:07,234 INFO ]: Interprodecural is true [2018-06-22 15:09:07,234 INFO ]: Hoare is false [2018-06-22 15:09:07,234 INFO ]: Compute interpolants for FPandBP [2018-06-22 15:09:07,234 INFO ]: Backedges is TWOTRACK [2018-06-22 15:09:07,234 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 15:09:07,234 INFO ]: Difference is false [2018-06-22 15:09:07,234 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 15:09:07,234 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 15:09:07,247 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 15:09:07,256 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 15:09:07,256 INFO ]: Found error trace [2018-06-22 15:09:07,257 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:09:07,257 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:09:07,262 INFO ]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times [2018-06-22 15:09:07,264 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:09:07,264 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:09:07,301 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:09:07,301 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:09:07,301 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:09:07,337 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:09:07,419 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 15:09:07,421 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 15:09:07,421 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 15:09:07,423 INFO ]: Interpolant automaton has 4 states [2018-06-22 15:09:07,437 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 15:09:07,437 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 15:09:07,439 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 15:09:07,529 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:09:07,530 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 15:09:07,530 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 15:09:07,531 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 15:09:07,531 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:09:07,541 INFO ]: With dead ends: 13 [2018-06-22 15:09:07,541 INFO ]: Without dead ends: 13 [2018-06-22 15:09:07,543 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 15:09:07,560 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 15:09:07,588 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 15:09:07,589 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 15:09:07,589 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 15:09:07,591 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 15:09:07,591 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:09:07,591 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 15:09:07,591 INFO ]: Interpolant automaton has 4 states. [2018-06-22 15:09:07,591 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 15:09:07,593 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 15:09:07,593 INFO ]: Found error trace [2018-06-22 15:09:07,593 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:09:07,593 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:09:07,593 INFO ]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times [2018-06-22 15:09:07,593 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:09:07,593 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:09:07,594 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:09:07,594 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:09:07,594 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:09:07,637 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:09:07,833 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 15:09:07,833 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:09:07,833 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 15:09:07,841 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:09:07,877 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:09:07,884 INFO ]: Computing forward predicates... [2018-06-22 15:09:08,265 WARN ]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-22 15:09:08,711 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 15:09:08,732 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:09:08,732 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-06-22 15:09:08,732 INFO ]: Interpolant automaton has 9 states [2018-06-22 15:09:08,732 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 15:09:08,733 INFO ]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-06-22 15:09:08,733 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 9 states. [2018-06-22 15:09:08,913 WARN ]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-06-22 15:09:08,979 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:09:08,979 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 15:09:08,979 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 15:09:08,979 INFO ]: Start accepts. Automaton has 9 states. Word has length 13 [2018-06-22 15:09:08,980 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:09:08,980 INFO ]: With dead ends: 15 [2018-06-22 15:09:08,980 INFO ]: Without dead ends: 15 [2018-06-22 15:09:08,981 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2018-06-22 15:09:08,981 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 15:09:08,984 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 15:09:08,984 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 15:09:08,984 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 15:09:08,985 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 15:09:08,985 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:09:08,985 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 15:09:08,985 INFO ]: Interpolant automaton has 9 states. [2018-06-22 15:09:08,985 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 15:09:08,986 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 15:09:08,987 INFO ]: Found error trace [2018-06-22 15:09:08,987 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:09:08,987 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:09:08,987 INFO ]: Analyzing trace with hash -1649658231, now seen corresponding path program 2 times [2018-06-22 15:09:08,987 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:09:08,987 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:09:08,988 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:09:08,988 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:09:08,988 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:09:09,023 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:09:09,448 WARN ]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-06-22 15:09:09,848 WARN ]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2018-06-22 15:09:09,850 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 15:09:09,850 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:09:09,850 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-06-22 15:09:09,863 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:09:09,903 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 15:09:09,903 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:09:09,906 INFO ]: Computing forward predicates... [2018-06-22 15:09:10,160 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 15:09:10,180 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:09:10,181 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2018-06-22 15:09:10,181 INFO ]: Interpolant automaton has 11 states [2018-06-22 15:09:10,181 INFO ]: Constructing interpolant automaton starting with 11 interpolants. [2018-06-22 15:09:10,181 INFO ]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2018-06-22 15:09:10,181 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 11 states. [2018-06-22 15:09:10,372 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:09:10,372 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 15:09:10,373 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 15:09:10,373 INFO ]: Start accepts. Automaton has 11 states. Word has length 17 [2018-06-22 15:09:10,373 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:09:10,374 INFO ]: With dead ends: 17 [2018-06-22 15:09:10,374 INFO ]: Without dead ends: 17 [2018-06-22 15:09:10,374 INFO ]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2018-06-22 15:09:10,374 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 15:09:10,377 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 15:09:10,377 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 15:09:10,378 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 15:09:10,378 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 15:09:10,378 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:09:10,378 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 15:09:10,378 INFO ]: Interpolant automaton has 11 states. [2018-06-22 15:09:10,378 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 15:09:10,379 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 15:09:10,379 INFO ]: Found error trace [2018-06-22 15:09:10,379 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:09:10,379 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:09:10,379 INFO ]: Analyzing trace with hash 2119922091, now seen corresponding path program 3 times [2018-06-22 15:09:10,379 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:09:10,379 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:09:10,380 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:09:10,380 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:09:10,380 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:09:10,445 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:09:10,739 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 15:09:10,739 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:09:10,739 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 15:09:10,748 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 15:09:10,777 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 15:09:10,777 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:09:10,781 INFO ]: Computing forward predicates... [2018-06-22 15:09:11,514 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 15:09:11,544 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:09:11,544 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2018-06-22 15:09:11,545 INFO ]: Interpolant automaton has 13 states [2018-06-22 15:09:11,545 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-22 15:09:11,545 INFO ]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2018-06-22 15:09:11,545 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 13 states. [2018-06-22 15:09:11,920 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:09:11,920 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-22 15:09:11,921 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 15:09:11,921 INFO ]: Start accepts. Automaton has 13 states. Word has length 21 [2018-06-22 15:09:11,921 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:09:11,921 INFO ]: With dead ends: 19 [2018-06-22 15:09:11,921 INFO ]: Without dead ends: 19 [2018-06-22 15:09:11,922 INFO ]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2018-06-22 15:09:11,922 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 15:09:11,924 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 15:09:11,924 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 15:09:11,925 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-22 15:09:11,925 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-22 15:09:11,925 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:09:11,925 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-22 15:09:11,925 INFO ]: Interpolant automaton has 13 states. [2018-06-22 15:09:11,925 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-22 15:09:11,926 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 15:09:11,926 INFO ]: Found error trace [2018-06-22 15:09:11,926 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:09:11,926 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:09:11,926 INFO ]: Analyzing trace with hash 1762711629, now seen corresponding path program 4 times [2018-06-22 15:09:11,926 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:09:11,926 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:09:11,927 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:09:11,927 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:09:11,927 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:09:11,956 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:09:12,169 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 15:09:12,169 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:09:12,169 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 15:09:12,175 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 15:09:12,231 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 15:09:12,231 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:09:12,235 INFO ]: Computing forward predicates... [2018-06-22 15:09:12,541 WARN ]: Spent 113.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2018-06-22 15:09:12,926 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 15:09:12,946 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:09:12,946 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2018-06-22 15:09:12,946 INFO ]: Interpolant automaton has 17 states [2018-06-22 15:09:12,946 INFO ]: Constructing interpolant automaton starting with 17 interpolants. [2018-06-22 15:09:12,946 INFO ]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2018-06-22 15:09:12,946 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 17 states. [2018-06-22 15:09:13,263 WARN ]: Spent 266.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2018-06-22 15:09:13,476 WARN ]: Spent 119.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 29 [2018-06-22 15:09:13,633 WARN ]: Spent 140.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2018-06-22 15:09:13,811 WARN ]: Spent 152.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2018-06-22 15:09:13,834 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:09:13,834 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-22 15:09:13,835 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 15:09:13,835 INFO ]: Start accepts. Automaton has 17 states. Word has length 25 [2018-06-22 15:09:13,835 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:09:13,836 INFO ]: With dead ends: 21 [2018-06-22 15:09:13,836 INFO ]: Without dead ends: 21 [2018-06-22 15:09:13,836 INFO ]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2018-06-22 15:09:13,836 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-22 15:09:13,839 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-22 15:09:13,839 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-22 15:09:13,840 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-22 15:09:13,840 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 25 [2018-06-22 15:09:13,840 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:09:13,840 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-22 15:09:13,840 INFO ]: Interpolant automaton has 17 states. [2018-06-22 15:09:13,840 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-22 15:09:13,841 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 15:09:13,841 INFO ]: Found error trace [2018-06-22 15:09:13,841 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:09:13,841 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:09:13,842 INFO ]: Analyzing trace with hash 853117551, now seen corresponding path program 5 times [2018-06-22 15:09:13,842 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:09:13,842 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:09:13,842 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:09:13,842 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:09:13,842 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:09:13,892 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:09:14,336 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 15:09:14,337 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:09:14,337 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 15:09:14,343 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 15:09:14,446 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-06-22 15:09:14,446 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:09:14,451 INFO ]: Computing forward predicates... [2018-06-22 15:09:15,200 WARN ]: Spent 510.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 45 [2018-06-22 15:09:15,497 WARN ]: Spent 176.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2018-06-22 15:09:17,245 WARN ]: Spent 542.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 16 [2018-06-22 15:09:17,777 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 15:09:17,796 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:09:17,796 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2018-06-22 15:09:17,796 INFO ]: Interpolant automaton has 23 states [2018-06-22 15:09:17,796 INFO ]: Constructing interpolant automaton starting with 23 interpolants. [2018-06-22 15:09:17,796 INFO ]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2018-06-22 15:09:17,797 INFO ]: Start difference. First operand 21 states and 22 transitions. Second operand 23 states. [2018-06-22 15:09:18,348 WARN ]: Spent 505.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 64 [2018-06-22 15:09:18,511 WARN ]: Spent 127.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 21 [2018-06-22 15:09:18,819 WARN ]: Spent 266.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 33 [2018-06-22 15:09:19,153 WARN ]: Spent 304.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 43 [2018-06-22 15:09:19,566 WARN ]: Spent 381.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 38 [2018-06-22 15:09:19,900 WARN ]: Spent 300.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 37 [2018-06-22 15:09:20,049 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:09:20,049 INFO ]: Finished difference Result 23 states and 24 transitions. [2018-06-22 15:09:20,050 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 15:09:20,050 INFO ]: Start accepts. Automaton has 23 states. Word has length 29 [2018-06-22 15:09:20,050 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:09:20,051 INFO ]: With dead ends: 23 [2018-06-22 15:09:20,051 INFO ]: Without dead ends: 23 [2018-06-22 15:09:20,051 INFO ]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=144, Invalid=668, Unknown=0, NotChecked=0, Total=812 [2018-06-22 15:09:20,051 INFO ]: Start minimizeSevpa. Operand 23 states. [2018-06-22 15:09:20,054 INFO ]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-06-22 15:09:20,054 INFO ]: Start removeUnreachable. Operand 23 states. [2018-06-22 15:09:20,055 INFO ]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-06-22 15:09:20,055 INFO ]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 29 [2018-06-22 15:09:20,055 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:09:20,055 INFO ]: Abstraction has 23 states and 24 transitions. [2018-06-22 15:09:20,055 INFO ]: Interpolant automaton has 23 states. [2018-06-22 15:09:20,056 INFO ]: Start isEmpty. Operand 23 states and 24 transitions. [2018-06-22 15:09:20,057 INFO ]: Finished isEmpty. Found accepting run of length 34 [2018-06-22 15:09:20,057 INFO ]: Found error trace [2018-06-22 15:09:20,057 INFO ]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:09:20,057 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:09:20,057 INFO ]: Analyzing trace with hash -1661294575, now seen corresponding path program 6 times [2018-06-22 15:09:20,057 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:09:20,057 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:09:20,058 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:09:20,058 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:09:20,058 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:09:20,108 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:09:20,665 WARN ]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-06-22 15:09:21,343 WARN ]: Spent 612.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-06-22 15:09:21,725 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 15:09:21,725 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:09:21,725 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) [2018-06-22 15:09:21,740 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:09:21,804 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-06-22 15:09:21,804 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:09:21,809 INFO ]: Computing forward predicates... [2018-06-22 15:09:22,239 WARN ]: Spent 138.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2018-06-22 15:09:22,493 WARN ]: Spent 104.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2018-06-22 15:09:23,185 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 15:09:23,216 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:09:23,216 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 28 [2018-06-22 15:09:23,217 INFO ]: Interpolant automaton has 28 states [2018-06-22 15:09:23,217 INFO ]: Constructing interpolant automaton starting with 28 interpolants. [2018-06-22 15:09:23,217 INFO ]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2018-06-22 15:09:23,217 INFO ]: Start difference. First operand 23 states and 24 transitions. Second operand 28 states. [2018-06-22 15:09:23,746 WARN ]: Spent 428.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 70 [2018-06-22 15:09:23,905 WARN ]: Spent 124.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 43 [2018-06-22 15:09:24,091 WARN ]: Spent 156.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 42 [2018-06-22 15:09:24,366 WARN ]: Spent 206.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 47 [2018-06-22 15:09:24,809 WARN ]: Spent 236.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 47 [2018-06-22 15:09:25,094 WARN ]: Spent 234.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 43 [2018-06-22 15:09:25,310 WARN ]: Spent 184.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 56 [2018-06-22 15:09:25,340 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:09:25,340 INFO ]: Finished difference Result 25 states and 26 transitions. [2018-06-22 15:09:25,341 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-22 15:09:25,341 INFO ]: Start accepts. Automaton has 28 states. Word has length 33 [2018-06-22 15:09:25,341 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:09:25,341 INFO ]: With dead ends: 25 [2018-06-22 15:09:25,341 INFO ]: Without dead ends: 25 [2018-06-22 15:09:25,342 INFO ]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=212, Invalid=1048, Unknown=0, NotChecked=0, Total=1260 [2018-06-22 15:09:25,342 INFO ]: Start minimizeSevpa. Operand 25 states. [2018-06-22 15:09:25,345 INFO ]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-06-22 15:09:25,345 INFO ]: Start removeUnreachable. Operand 25 states. [2018-06-22 15:09:25,346 INFO ]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-06-22 15:09:25,346 INFO ]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 33 [2018-06-22 15:09:25,346 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:09:25,346 INFO ]: Abstraction has 25 states and 26 transitions. [2018-06-22 15:09:25,346 INFO ]: Interpolant automaton has 28 states. [2018-06-22 15:09:25,346 INFO ]: Start isEmpty. Operand 25 states and 26 transitions. [2018-06-22 15:09:25,347 INFO ]: Finished isEmpty. Found accepting run of length 38 [2018-06-22 15:09:25,347 INFO ]: Found error trace [2018-06-22 15:09:25,347 INFO ]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:09:25,347 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:09:25,347 INFO ]: Analyzing trace with hash -1494134477, now seen corresponding path program 7 times [2018-06-22 15:09:25,347 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:09:25,347 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:09:25,348 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:09:25,348 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:09:25,348 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:09:25,429 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:09:25,701 WARN ]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2018-06-22 15:09:26,257 INFO ]: Checked inductivity of 105 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-22 15:09:26,257 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:09:26,257 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 15:09:26,264 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:09:26,304 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:09:26,310 INFO ]: Computing forward predicates... [2018-06-22 15:09:26,660 WARN ]: Spent 115.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2018-06-22 15:09:28,298 INFO ]: Checked inductivity of 105 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-22 15:09:28,317 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:09:28,318 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2018-06-22 15:09:28,318 INFO ]: Interpolant automaton has 33 states [2018-06-22 15:09:28,318 INFO ]: Constructing interpolant automaton starting with 33 interpolants. [2018-06-22 15:09:28,318 INFO ]: CoverageRelationStatistics Valid=94, Invalid=962, Unknown=0, NotChecked=0, Total=1056 [2018-06-22 15:09:28,319 INFO ]: Start difference. First operand 25 states and 26 transitions. Second operand 33 states. [2018-06-22 15:09:28,863 WARN ]: Spent 467.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2018-06-22 15:09:29,190 WARN ]: Spent 122.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 43 [2018-06-22 15:09:29,401 WARN ]: Spent 179.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 45 [2018-06-22 15:09:29,624 WARN ]: Spent 191.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 50 [2018-06-22 15:09:29,839 WARN ]: Spent 179.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 49 [2018-06-22 15:09:30,204 WARN ]: Spent 333.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 48 [2018-06-22 15:09:30,417 WARN ]: Spent 180.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 47 [2018-06-22 15:09:30,603 WARN ]: Spent 156.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 47 [2018-06-22 15:09:30,707 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:09:30,707 INFO ]: Finished difference Result 27 states and 28 transitions. [2018-06-22 15:09:30,708 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-06-22 15:09:30,708 INFO ]: Start accepts. Automaton has 33 states. Word has length 37 [2018-06-22 15:09:30,709 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:09:30,709 INFO ]: With dead ends: 27 [2018-06-22 15:09:30,709 INFO ]: Without dead ends: 27 [2018-06-22 15:09:30,710 INFO ]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=254, Invalid=1468, Unknown=0, NotChecked=0, Total=1722 [2018-06-22 15:09:30,710 INFO ]: Start minimizeSevpa. Operand 27 states. [2018-06-22 15:09:30,713 INFO ]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-06-22 15:09:30,713 INFO ]: Start removeUnreachable. Operand 27 states. [2018-06-22 15:09:30,714 INFO ]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-06-22 15:09:30,714 INFO ]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 37 [2018-06-22 15:09:30,714 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:09:30,715 INFO ]: Abstraction has 27 states and 28 transitions. [2018-06-22 15:09:30,715 INFO ]: Interpolant automaton has 33 states. [2018-06-22 15:09:30,715 INFO ]: Start isEmpty. Operand 27 states and 28 transitions. [2018-06-22 15:09:30,716 INFO ]: Finished isEmpty. Found accepting run of length 42 [2018-06-22 15:09:30,716 INFO ]: Found error trace [2018-06-22 15:09:30,716 INFO ]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:09:30,716 INFO ]: === Iteration 9 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:09:30,716 INFO ]: Analyzing trace with hash 1618126293, now seen corresponding path program 8 times [2018-06-22 15:09:30,716 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:09:30,716 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:09:30,717 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:09:30,717 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:09:30,717 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:09:30,796 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:09:31,045 WARN ]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-22 15:09:31,624 INFO ]: Checked inductivity of 136 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-06-22 15:09:31,624 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:09:31,624 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 15:09:31,629 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 15:09:31,675 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 15:09:31,675 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:09:31,682 INFO ]: Computing forward predicates... [2018-06-22 15:09:31,937 WARN ]: Spent 102.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2018-06-22 15:09:32,182 WARN ]: Spent 108.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2018-06-22 15:09:34,746 INFO ]: Checked inductivity of 136 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-06-22 15:09:34,765 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:09:34,765 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 36 [2018-06-22 15:09:34,766 INFO ]: Interpolant automaton has 36 states [2018-06-22 15:09:34,766 INFO ]: Constructing interpolant automaton starting with 36 interpolants. [2018-06-22 15:09:34,766 INFO ]: CoverageRelationStatistics Valid=107, Invalid=1153, Unknown=0, NotChecked=0, Total=1260 [2018-06-22 15:09:34,766 INFO ]: Start difference. First operand 27 states and 28 transitions. Second operand 36 states. [2018-06-22 15:09:35,469 WARN ]: Spent 581.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 76 [2018-06-22 15:09:35,701 WARN ]: Spent 156.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 34 [2018-06-22 15:09:35,936 WARN ]: Spent 184.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 46 [2018-06-22 15:09:36,254 WARN ]: Spent 277.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 53 [2018-06-22 15:09:36,581 WARN ]: Spent 261.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 51 [2018-06-22 15:09:36,901 WARN ]: Spent 282.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 52 [2018-06-22 15:09:37,190 WARN ]: Spent 251.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 51 [2018-06-22 15:09:37,467 WARN ]: Spent 204.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 45 [2018-06-22 15:09:37,718 WARN ]: Spent 213.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 46 [2018-06-22 15:09:38,360 WARN ]: Spent 580.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 68 [2018-06-22 15:09:38,401 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:09:38,401 INFO ]: Finished difference Result 31 states and 32 transitions. [2018-06-22 15:09:38,402 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-06-22 15:09:38,402 INFO ]: Start accepts. Automaton has 36 states. Word has length 41 [2018-06-22 15:09:38,402 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:09:38,402 INFO ]: With dead ends: 31 [2018-06-22 15:09:38,402 INFO ]: Without dead ends: 31 [2018-06-22 15:09:38,403 INFO ]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=331, Invalid=1831, Unknown=0, NotChecked=0, Total=2162 [2018-06-22 15:09:38,403 INFO ]: Start minimizeSevpa. Operand 31 states. [2018-06-22 15:09:38,407 INFO ]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-06-22 15:09:38,407 INFO ]: Start removeUnreachable. Operand 31 states. [2018-06-22 15:09:38,408 INFO ]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-06-22 15:09:38,408 INFO ]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 41 [2018-06-22 15:09:38,408 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:09:38,408 INFO ]: Abstraction has 31 states and 32 transitions. [2018-06-22 15:09:38,408 INFO ]: Interpolant automaton has 36 states. [2018-06-22 15:09:38,408 INFO ]: Start isEmpty. Operand 31 states and 32 transitions. [2018-06-22 15:09:38,409 INFO ]: Finished isEmpty. Found accepting run of length 50 [2018-06-22 15:09:38,409 INFO ]: Found error trace [2018-06-22 15:09:38,409 INFO ]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:09:38,410 INFO ]: === Iteration 10 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:09:38,410 INFO ]: Analyzing trace with hash -570306151, now seen corresponding path program 9 times [2018-06-22 15:09:38,410 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:09:38,410 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:09:38,410 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:09:38,410 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:09:38,410 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:09:38,544 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:09:39,353 INFO ]: Checked inductivity of 210 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2018-06-22 15:09:39,353 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:09:39,353 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 15:09:39,358 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 15:09:39,443 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-06-22 15:09:39,443 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:09:39,450 INFO ]: Computing forward predicates... [2018-06-22 15:09:41,120 INFO ]: Checked inductivity of 210 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2018-06-22 15:09:41,151 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:09:41,211 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 39 [2018-06-22 15:09:41,212 INFO ]: Interpolant automaton has 39 states [2018-06-22 15:09:41,212 INFO ]: Constructing interpolant automaton starting with 39 interpolants. [2018-06-22 15:09:41,212 INFO ]: CoverageRelationStatistics Valid=122, Invalid=1360, Unknown=0, NotChecked=0, Total=1482 [2018-06-22 15:09:41,212 INFO ]: Start difference. First operand 31 states and 32 transitions. Second operand 39 states. [2018-06-22 15:09:41,760 WARN ]: Spent 497.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2018-06-22 15:09:41,987 WARN ]: Spent 181.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 39 [2018-06-22 15:09:42,217 WARN ]: Spent 192.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 49 [2018-06-22 15:09:42,467 WARN ]: Spent 212.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 56 [2018-06-22 15:09:42,785 WARN ]: Spent 268.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 55 [2018-06-22 15:09:43,033 WARN ]: Spent 196.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 52 [2018-06-22 15:09:43,252 WARN ]: Spent 181.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 52 [2018-06-22 15:09:43,498 WARN ]: Spent 211.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 47 [2018-06-22 15:09:43,805 WARN ]: Spent 240.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 50 [2018-06-22 15:09:44,070 WARN ]: Spent 228.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 48 [2018-06-22 15:09:44,365 WARN ]: Spent 255.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 53 [2018-06-22 15:09:44,401 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:09:44,401 INFO ]: Finished difference Result 33 states and 34 transitions. [2018-06-22 15:09:44,403 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-06-22 15:09:44,403 INFO ]: Start accepts. Automaton has 39 states. Word has length 49 [2018-06-22 15:09:44,403 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:09:44,403 INFO ]: With dead ends: 33 [2018-06-22 15:09:44,403 INFO ]: Without dead ends: 33 [2018-06-22 15:09:44,404 INFO ]: 0 DeclaredPredicates, 83 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=369, Invalid=2081, Unknown=0, NotChecked=0, Total=2450 [2018-06-22 15:09:44,404 INFO ]: Start minimizeSevpa. Operand 33 states. [2018-06-22 15:09:44,408 INFO ]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-06-22 15:09:44,408 INFO ]: Start removeUnreachable. Operand 33 states. [2018-06-22 15:09:44,409 INFO ]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-06-22 15:09:44,409 INFO ]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 49 [2018-06-22 15:09:44,409 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:09:44,409 INFO ]: Abstraction has 33 states and 34 transitions. [2018-06-22 15:09:44,409 INFO ]: Interpolant automaton has 39 states. [2018-06-22 15:09:44,409 INFO ]: Start isEmpty. Operand 33 states and 34 transitions. [2018-06-22 15:09:44,410 INFO ]: Finished isEmpty. Found accepting run of length 54 [2018-06-22 15:09:44,411 INFO ]: Found error trace [2018-06-22 15:09:44,411 INFO ]: trace histogram [12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:09:44,411 INFO ]: === Iteration 11 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:09:44,411 INFO ]: Analyzing trace with hash 1955719355, now seen corresponding path program 10 times [2018-06-22 15:09:44,411 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:09:44,411 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:09:44,411 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:09:44,411 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:09:44,411 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:09:44,477 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:09:44,699 WARN ]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-22 15:09:45,556 INFO ]: Checked inductivity of 253 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2018-06-22 15:09:45,556 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:09:45,556 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:09:45,563 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 15:09:45,632 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 15:09:45,632 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:09:45,640 INFO ]: Computing forward predicates... [2018-06-22 15:09:48,354 WARN ]: Spent 2.11 s on a formula simplification. DAG size of input: 130 DAG size of output: 125 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown