java -Xss1g -Xmx4000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCHC.xml --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf -i /storage/chc-comp/vmt-chc-benchmarks/ctigar/simple_nest.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 05:57:51,114 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 05:57:51,116 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 05:57:51,133 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 05:57:51,133 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 05:57:51,136 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 05:57:51,138 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 05:57:51,140 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 05:57:51,141 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 05:57:51,144 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 05:57:51,144 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 05:57:51,145 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 05:57:51,145 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 05:57:51,147 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 05:57:51,150 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 05:57:51,150 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 05:57:51,152 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 05:57:51,166 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 05:57:51,168 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 05:57:51,169 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 05:57:51,171 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 05:57:51,173 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 05:57:51,173 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 05:57:51,175 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 05:57:51,176 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 05:57:51,177 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 05:57:51,178 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 05:57:51,179 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 05:57:51,180 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 05:57:51,180 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 05:57:51,181 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 05:57:51,182 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 05:57:51,182 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 05:57:51,183 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 05:57:51,184 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 05:57:51,184 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 05:57:51,198 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 05:57:51,199 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 05:57:51,199 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 05:57:51,199 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 05:57:51,202 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 05:57:51,202 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 05:57:51,203 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 05:57:51,203 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 05:57:51,203 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 05:57:51,203 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 05:57:51,203 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 05:57:51,204 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 05:57:51,204 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 05:57:51,204 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 05:57:51,204 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 05:57:51,204 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 05:57:51,205 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 05:57:51,206 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 05:57:51,206 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 05:57:51,248 INFO ]: Repository-Root is: /tmp [2018-06-22 05:57:51,266 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 05:57:51,272 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 05:57:51,273 INFO ]: Initializing SmtParser... [2018-06-22 05:57:51,274 INFO ]: SmtParser initialized [2018-06-22 05:57:51,274 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/simple_nest.c.smt2 [2018-06-22 05:57:51,276 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 05:57:51,382 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/simple_nest.c.smt2 unknown [2018-06-22 05:57:51,599 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/simple_nest.c.smt2 [2018-06-22 05:57:51,604 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 05:57:51,610 INFO ]: Walking toolchain with 4 elements. [2018-06-22 05:57:51,611 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 05:57:51,611 INFO ]: Initializing ChcToBoogie... [2018-06-22 05:57:51,611 INFO ]: ChcToBoogie initialized [2018-06-22 05:57:51,619 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:57:51" (1/1) ... [2018-06-22 05:57:51,670 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:57:51 Unit [2018-06-22 05:57:51,671 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 05:57:51,672 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 05:57:51,672 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 05:57:51,672 INFO ]: Boogie Preprocessor initialized [2018-06-22 05:57:51,695 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:57:51" (1/1) ... [2018-06-22 05:57:51,696 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:57:51" (1/1) ... [2018-06-22 05:57:51,702 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:57:51" (1/1) ... [2018-06-22 05:57:51,703 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:57:51" (1/1) ... [2018-06-22 05:57:51,716 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:57:51" (1/1) ... [2018-06-22 05:57:51,718 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:57:51" (1/1) ... [2018-06-22 05:57:51,719 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:57:51" (1/1) ... [2018-06-22 05:57:51,721 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 05:57:51,731 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 05:57:51,731 INFO ]: Initializing RCFGBuilder... [2018-06-22 05:57:51,731 INFO ]: RCFGBuilder initialized [2018-06-22 05:57:51,732 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:57:51" (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 05:57:51,754 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 05:57:51,754 INFO ]: Found specification of procedure gotoProc [2018-06-22 05:57:51,754 INFO ]: Found implementation of procedure gotoProc [2018-06-22 05:57:51,754 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 05:57:51,754 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 05:57:51,754 INFO ]: Found implementation of procedure Ultimate.START [2018-06-22 05:57:51,960 INFO ]: Using library mode [2018-06-22 05:57:51,960 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:57:51 BoogieIcfgContainer [2018-06-22 05:57:51,960 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 05:57:51,962 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 05:57:51,962 INFO ]: Initializing TraceAbstraction... [2018-06-22 05:57:51,978 INFO ]: TraceAbstraction initialized [2018-06-22 05:57:51,978 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:57:51" (1/3) ... [2018-06-22 05:57:51,979 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21c51088 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 05:57:51, skipping insertion in model container [2018-06-22 05:57:51,979 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:57:51" (2/3) ... [2018-06-22 05:57:51,979 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21c51088 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 05:57:51, skipping insertion in model container [2018-06-22 05:57:51,979 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:57:51" (3/3) ... [2018-06-22 05:57:51,982 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 05:57:51,993 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 05:57:52,015 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 05:57:52,114 INFO ]: Using default assertion order modulation [2018-06-22 05:57:52,115 INFO ]: Interprodecural is true [2018-06-22 05:57:52,115 INFO ]: Hoare is false [2018-06-22 05:57:52,115 INFO ]: Compute interpolants for FPandBP [2018-06-22 05:57:52,115 INFO ]: Backedges is TWOTRACK [2018-06-22 05:57:52,115 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 05:57:52,115 INFO ]: Difference is false [2018-06-22 05:57:52,115 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 05:57:52,115 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 05:57:52,143 INFO ]: Start isEmpty. Operand 10 states. [2018-06-22 05:57:52,156 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-22 05:57:52,156 INFO ]: Found error trace [2018-06-22 05:57:52,157 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:57:52,158 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:57:52,164 INFO ]: Analyzing trace with hash 1285054476, now seen corresponding path program 1 times [2018-06-22 05:57:52,166 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:57:52,167 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:57:52,210 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:57:52,210 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:57:52,210 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:57:52,263 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:57:52,349 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:57:52,351 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 05:57:52,351 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 05:57:52,353 INFO ]: Interpolant automaton has 3 states [2018-06-22 05:57:52,364 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 05:57:52,365 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 05:57:52,367 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-22 05:57:52,434 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:57:52,434 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-22 05:57:52,436 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 05:57:52,437 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-22 05:57:52,438 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:57:52,446 INFO ]: With dead ends: 9 [2018-06-22 05:57:52,446 INFO ]: Without dead ends: 9 [2018-06-22 05:57:52,448 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 05:57:52,464 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-22 05:57:52,486 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-22 05:57:52,487 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-22 05:57:52,488 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-22 05:57:52,489 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-22 05:57:52,489 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:57:52,489 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-22 05:57:52,489 INFO ]: Interpolant automaton has 3 states. [2018-06-22 05:57:52,489 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-22 05:57:52,489 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 05:57:52,489 INFO ]: Found error trace [2018-06-22 05:57:52,489 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:57:52,489 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:57:52,490 INFO ]: Analyzing trace with hash 1180100628, now seen corresponding path program 1 times [2018-06-22 05:57:52,490 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:57:52,490 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:57:52,491 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:57:52,491 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:57:52,491 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:57:52,525 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:57:52,646 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:57:52,646 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:57:52,646 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 05:57:52,654 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:57:52,704 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:57:52,714 INFO ]: Computing forward predicates... [2018-06-22 05:57:52,905 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:57:52,932 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:57:52,932 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-22 05:57:52,933 INFO ]: Interpolant automaton has 5 states [2018-06-22 05:57:52,934 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-22 05:57:52,934 INFO ]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-06-22 05:57:52,934 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-06-22 05:57:52,975 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:57:52,975 INFO ]: Finished difference Result 10 states and 10 transitions. [2018-06-22 05:57:52,976 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-22 05:57:52,976 INFO ]: Start accepts. Automaton has 5 states. Word has length 8 [2018-06-22 05:57:52,976 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:57:52,976 INFO ]: With dead ends: 10 [2018-06-22 05:57:52,976 INFO ]: Without dead ends: 10 [2018-06-22 05:57:52,977 INFO ]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-06-22 05:57:52,977 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-22 05:57:52,978 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-22 05:57:52,978 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-22 05:57:52,979 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-06-22 05:57:52,979 INFO ]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-06-22 05:57:52,979 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:57:52,979 INFO ]: Abstraction has 10 states and 10 transitions. [2018-06-22 05:57:52,979 INFO ]: Interpolant automaton has 5 states. [2018-06-22 05:57:52,979 INFO ]: Start isEmpty. Operand 10 states and 10 transitions. [2018-06-22 05:57:52,979 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 05:57:52,979 INFO ]: Found error trace [2018-06-22 05:57:52,980 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:57:52,980 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:57:52,981 INFO ]: Analyzing trace with hash -2073468660, now seen corresponding path program 2 times [2018-06-22 05:57:52,981 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:57:52,981 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:57:52,982 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:57:52,982 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:57:52,982 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:57:53,038 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:57:53,347 WARN ]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2018-06-22 05:57:53,349 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:57:53,349 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:57:53,349 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 05:57:53,366 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 05:57:53,409 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 05:57:53,409 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:57:53,411 INFO ]: Computing forward predicates... [2018-06-22 05:57:54,453 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:57:54,490 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:57:54,490 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-06-22 05:57:54,491 INFO ]: Interpolant automaton has 6 states [2018-06-22 05:57:54,491 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 05:57:54,491 INFO ]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-06-22 05:57:54,491 INFO ]: Start difference. First operand 10 states and 10 transitions. Second operand 6 states. [2018-06-22 05:57:54,887 WARN ]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-06-22 05:57:54,954 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:57:54,954 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-22 05:57:54,954 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 05:57:54,954 INFO ]: Start accepts. Automaton has 6 states. Word has length 9 [2018-06-22 05:57:54,954 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:57:54,954 INFO ]: With dead ends: 11 [2018-06-22 05:57:54,955 INFO ]: Without dead ends: 11 [2018-06-22 05:57:54,955 INFO ]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-06-22 05:57:54,955 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-22 05:57:54,956 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-22 05:57:54,956 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-22 05:57:54,956 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-22 05:57:54,957 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-06-22 05:57:54,957 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:57:54,957 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-22 05:57:54,957 INFO ]: Interpolant automaton has 6 states. [2018-06-22 05:57:54,957 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-22 05:57:54,957 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-22 05:57:54,957 INFO ]: Found error trace [2018-06-22 05:57:54,957 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:57:54,957 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:57:54,957 INFO ]: Analyzing trace with hash 145098516, now seen corresponding path program 3 times [2018-06-22 05:57:54,957 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:57:54,957 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:57:54,958 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:57:54,958 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:57:54,958 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:57:54,982 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:57:55,254 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:57:55,254 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:57:55,254 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 05:57:55,262 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 05:57:55,329 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-22 05:57:55,329 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:57:55,332 INFO ]: Computing forward predicates... [2018-06-22 05:57:55,851 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:57:55,879 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:57:55,879 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-06-22 05:57:55,879 INFO ]: Interpolant automaton has 7 states [2018-06-22 05:57:55,879 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-22 05:57:55,879 INFO ]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-06-22 05:57:55,880 INFO ]: Start difference. First operand 11 states and 11 transitions. Second operand 7 states. [2018-06-22 05:57:55,987 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:57:55,987 INFO ]: Finished difference Result 12 states and 12 transitions. [2018-06-22 05:57:55,987 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 05:57:55,987 INFO ]: Start accepts. Automaton has 7 states. Word has length 10 [2018-06-22 05:57:55,987 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:57:55,988 INFO ]: With dead ends: 12 [2018-06-22 05:57:55,988 INFO ]: Without dead ends: 12 [2018-06-22 05:57:55,988 INFO ]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2018-06-22 05:57:55,988 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-22 05:57:55,990 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-06-22 05:57:55,990 INFO ]: Start removeUnreachable. Operand 12 states. [2018-06-22 05:57:55,990 INFO ]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-06-22 05:57:55,990 INFO ]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-06-22 05:57:55,990 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:57:55,990 INFO ]: Abstraction has 12 states and 12 transitions. [2018-06-22 05:57:55,990 INFO ]: Interpolant automaton has 7 states. [2018-06-22 05:57:55,990 INFO ]: Start isEmpty. Operand 12 states and 12 transitions. [2018-06-22 05:57:55,991 INFO ]: Finished isEmpty. Found accepting run of length 12 [2018-06-22 05:57:55,991 INFO ]: Found error trace [2018-06-22 05:57:55,991 INFO ]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:57:55,991 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:57:55,991 INFO ]: Analyzing trace with hash 201204236, now seen corresponding path program 4 times [2018-06-22 05:57:55,991 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:57:55,991 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:57:55,992 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:57:55,992 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:57:55,992 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:57:56,061 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:57:56,347 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:57:56,347 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:57:56,347 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 05:57:56,363 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 05:57:56,389 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 05:57:56,389 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:57:56,392 INFO ]: Computing forward predicates... [2018-06-22 05:57:57,518 WARN ]: Spent 134.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 15 [2018-06-22 05:57:58,907 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:57:58,942 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:57:58,942 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2018-06-22 05:57:58,942 INFO ]: Interpolant automaton has 10 states [2018-06-22 05:57:58,942 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-22 05:57:58,942 INFO ]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2018-06-22 05:57:58,943 INFO ]: Start difference. First operand 12 states and 12 transitions. Second operand 10 states. [2018-06-22 05:57:59,285 WARN ]: Spent 250.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 7 [2018-06-22 05:57:59,501 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:57:59,501 INFO ]: Finished difference Result 13 states and 13 transitions. [2018-06-22 05:57:59,501 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 05:57:59,501 INFO ]: Start accepts. Automaton has 10 states. Word has length 11 [2018-06-22 05:57:59,501 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:57:59,502 INFO ]: With dead ends: 13 [2018-06-22 05:57:59,502 INFO ]: Without dead ends: 13 [2018-06-22 05:57:59,502 INFO ]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2018-06-22 05:57:59,502 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 05:57:59,504 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 05:57:59,504 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 05:57:59,504 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-06-22 05:57:59,504 INFO ]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-06-22 05:57:59,505 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:57:59,505 INFO ]: Abstraction has 13 states and 13 transitions. [2018-06-22 05:57:59,505 INFO ]: Interpolant automaton has 10 states. [2018-06-22 05:57:59,505 INFO ]: Start isEmpty. Operand 13 states and 13 transitions. [2018-06-22 05:57:59,505 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-22 05:57:59,505 INFO ]: Found error trace [2018-06-22 05:57:59,505 INFO ]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:57:59,505 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:57:59,505 INFO ]: Analyzing trace with hash 1940481556, now seen corresponding path program 5 times [2018-06-22 05:57:59,505 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:57:59,505 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:57:59,506 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:57:59,506 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:57:59,506 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:57:59,570 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:57:59,877 WARN ]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-06-22 05:57:59,927 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:57:59,927 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:57:59,927 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 05:57:59,934 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 05:57:59,985 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-06-22 05:57:59,985 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:57:59,988 INFO ]: Computing forward predicates... [2018-06-22 05:58:04,054 WARN ]: Spent 113.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 15 [2018-06-22 05:58:06,346 WARN ]: Spent 745.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 10 [2018-06-22 05:58:06,540 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:58:06,576 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:58:06,576 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2018-06-22 05:58:06,576 INFO ]: Interpolant automaton has 12 states [2018-06-22 05:58:06,576 INFO ]: Constructing interpolant automaton starting with 12 interpolants. [2018-06-22 05:58:06,577 INFO ]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2018-06-22 05:58:06,577 INFO ]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states. [2018-06-22 05:58:07,021 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:58:07,021 INFO ]: Finished difference Result 14 states and 14 transitions. [2018-06-22 05:58:07,021 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 05:58:07,021 INFO ]: Start accepts. Automaton has 12 states. Word has length 12 [2018-06-22 05:58:07,021 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:58:07,022 INFO ]: With dead ends: 14 [2018-06-22 05:58:07,022 INFO ]: Without dead ends: 14 [2018-06-22 05:58:07,022 INFO ]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2018-06-22 05:58:07,022 INFO ]: Start minimizeSevpa. Operand 14 states. [2018-06-22 05:58:07,024 INFO ]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-06-22 05:58:07,024 INFO ]: Start removeUnreachable. Operand 14 states. [2018-06-22 05:58:07,024 INFO ]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-06-22 05:58:07,024 INFO ]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-06-22 05:58:07,024 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:58:07,024 INFO ]: Abstraction has 14 states and 14 transitions. [2018-06-22 05:58:07,024 INFO ]: Interpolant automaton has 12 states. [2018-06-22 05:58:07,024 INFO ]: Start isEmpty. Operand 14 states and 14 transitions. [2018-06-22 05:58:07,025 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 05:58:07,025 INFO ]: Found error trace [2018-06-22 05:58:07,025 INFO ]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:58:07,025 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:58:07,025 INFO ]: Analyzing trace with hash 23503628, now seen corresponding path program 6 times [2018-06-22 05:58:07,025 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:58:07,025 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:58:07,026 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:58:07,026 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:58:07,026 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:58:07,084 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:58:07,429 INFO ]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:58:07,429 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:58:07,429 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 05:58:07,435 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 05:58:07,468 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-06-22 05:58:07,468 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:58:07,472 INFO ]: Computing forward predicates... [2018-06-22 05:58:08,659 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:58:15,216 INFO ]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:58:15,251 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:58:15,251 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2018-06-22 05:58:15,251 INFO ]: Interpolant automaton has 12 states [2018-06-22 05:58:15,251 INFO ]: Constructing interpolant automaton starting with 12 interpolants. [2018-06-22 05:58:15,251 INFO ]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2018-06-22 05:58:15,252 INFO ]: Start difference. First operand 14 states and 14 transitions. Second operand 12 states. [2018-06-22 05:58:15,517 WARN ]: Spent 168.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 15 [2018-06-22 05:58:15,634 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:58:15,634 INFO ]: Finished difference Result 15 states and 15 transitions. [2018-06-22 05:58:15,634 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 05:58:15,634 INFO ]: Start accepts. Automaton has 12 states. Word has length 13 [2018-06-22 05:58:15,634 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:58:15,634 INFO ]: With dead ends: 15 [2018-06-22 05:58:15,634 INFO ]: Without dead ends: 15 [2018-06-22 05:58:15,635 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2018-06-22 05:58:15,635 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 05:58:15,638 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 05:58:15,638 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 05:58:15,639 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-06-22 05:58:15,639 INFO ]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-06-22 05:58:15,639 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:58:15,639 INFO ]: Abstraction has 15 states and 15 transitions. [2018-06-22 05:58:15,639 INFO ]: Interpolant automaton has 12 states. [2018-06-22 05:58:15,639 INFO ]: Start isEmpty. Operand 15 states and 15 transitions. [2018-06-22 05:58:15,639 INFO ]: Finished isEmpty. Found accepting run of length 15 [2018-06-22 05:58:15,639 INFO ]: Found error trace [2018-06-22 05:58:15,639 INFO ]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:58:15,639 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:58:15,640 INFO ]: Analyzing trace with hash 726730004, now seen corresponding path program 7 times [2018-06-22 05:58:15,640 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:58:15,640 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:58:15,640 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:58:15,640 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:58:15,640 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:58:15,686 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:58:15,996 INFO ]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:58:15,996 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:58:15,996 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 05:58:16,017 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:58:16,059 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:58:16,062 INFO ]: Computing forward predicates... [2018-06-22 05:58:16,194 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:58:16,516 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:58:17,128 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:58:18,622 INFO ]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:58:18,644 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:58:18,644 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2018-06-22 05:58:18,644 INFO ]: Interpolant automaton has 12 states [2018-06-22 05:58:18,644 INFO ]: Constructing interpolant automaton starting with 12 interpolants. [2018-06-22 05:58:18,644 INFO ]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-06-22 05:58:18,644 INFO ]: Start difference. First operand 15 states and 15 transitions. Second operand 12 states. [2018-06-22 05:58:19,183 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:58:19,183 INFO ]: Finished difference Result 17 states and 17 transitions. [2018-06-22 05:58:19,183 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-06-22 05:58:19,183 INFO ]: Start accepts. Automaton has 12 states. Word has length 14 [2018-06-22 05:58:19,183 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:58:19,184 INFO ]: With dead ends: 17 [2018-06-22 05:58:19,184 INFO ]: Without dead ends: 17 [2018-06-22 05:58:19,184 INFO ]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=140, Invalid=240, Unknown=0, NotChecked=0, Total=380 [2018-06-22 05:58:19,184 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 05:58:19,186 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 05:58:19,186 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 05:58:19,187 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-06-22 05:58:19,188 INFO ]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-06-22 05:58:19,188 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:58:19,188 INFO ]: Abstraction has 17 states and 17 transitions. [2018-06-22 05:58:19,188 INFO ]: Interpolant automaton has 12 states. [2018-06-22 05:58:19,188 INFO ]: Start isEmpty. Operand 17 states and 17 transitions. [2018-06-22 05:58:19,188 INFO ]: Finished isEmpty. Found accepting run of length 17 [2018-06-22 05:58:19,188 INFO ]: Found error trace [2018-06-22 05:58:19,188 INFO ]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:58:19,188 INFO ]: === Iteration 9 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:58:19,188 INFO ]: Analyzing trace with hash -1752374252, now seen corresponding path program 8 times [2018-06-22 05:58:19,188 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:58:19,189 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:58:19,189 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:58:19,189 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:58:19,189 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:58:19,260 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:58:19,597 WARN ]: Spent 109.00 ms on a formula simplification. DAG size of input: 6 DAG size of output: 1 [2018-06-22 05:58:20,350 WARN ]: Spent 681.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 10 [2018-06-22 05:58:20,712 WARN ]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-06-22 05:58:21,064 INFO ]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:58:21,064 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:58:21,064 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 05:58:21,075 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 05:58:21,132 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 05:58:21,132 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:58:21,135 INFO ]: Computing forward predicates... [2018-06-22 05:58:21,494 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:58:21,503 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 05:58:21,520 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 05:58:21,526 WARN ]: expecting exponential blowup for input size 8 [2018-06-22 05:58:21,538 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:58:23,376 INFO ]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:58:23,397 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:58:23,397 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2018-06-22 05:58:23,397 INFO ]: Interpolant automaton has 20 states [2018-06-22 05:58:23,397 INFO ]: Constructing interpolant automaton starting with 20 interpolants. [2018-06-22 05:58:23,397 INFO ]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2018-06-22 05:58:23,397 INFO ]: Start difference. First operand 17 states and 17 transitions. Second operand 20 states. [2018-06-22 05:58:23,622 WARN ]: Spent 159.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 20 [2018-06-22 05:58:23,960 WARN ]: Spent 328.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2018-06-22 05:58:24,208 WARN ]: Spent 185.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2018-06-22 05:58:24,335 WARN ]: Spent 102.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2018-06-22 05:58:24,561 WARN ]: Spent 104.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2018-06-22 05:58:25,106 WARN ]: Spent 121.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 20 [2018-06-22 05:58:25,107 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:58:25,108 INFO ]: Finished difference Result 22 states and 22 transitions. [2018-06-22 05:58:25,108 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-06-22 05:58:25,108 INFO ]: Start accepts. Automaton has 20 states. Word has length 16 [2018-06-22 05:58:25,108 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:58:25,108 INFO ]: With dead ends: 22 [2018-06-22 05:58:25,108 INFO ]: Without dead ends: 22 [2018-06-22 05:58:25,109 INFO ]: 0 DeclaredPredicates, 41 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=366, Invalid=756, Unknown=0, NotChecked=0, Total=1122 [2018-06-22 05:58:25,109 INFO ]: Start minimizeSevpa. Operand 22 states. [2018-06-22 05:58:25,114 INFO ]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-06-22 05:58:25,114 INFO ]: Start removeUnreachable. Operand 22 states. [2018-06-22 05:58:25,114 INFO ]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-06-22 05:58:25,114 INFO ]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 16 [2018-06-22 05:58:25,114 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:58:25,114 INFO ]: Abstraction has 22 states and 22 transitions. [2018-06-22 05:58:25,114 INFO ]: Interpolant automaton has 20 states. [2018-06-22 05:58:25,115 INFO ]: Start isEmpty. Operand 22 states and 22 transitions. [2018-06-22 05:58:25,115 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 05:58:25,115 INFO ]: Found error trace [2018-06-22 05:58:25,115 INFO ]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:58:25,115 INFO ]: === Iteration 10 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:58:25,115 INFO ]: Analyzing trace with hash 781068044, now seen corresponding path program 9 times [2018-06-22 05:58:25,115 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:58:25,115 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:58:25,116 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:58:25,116 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:58:25,116 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:58:25,199 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:58:25,693 INFO ]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:58:25,693 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:58:25,693 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 05:58:25,700 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 05:58:25,784 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-06-22 05:58:25,784 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:58:25,789 INFO ]: Computing forward predicates... [2018-06-22 05:58:29,218 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:58:32,036 WARN ]: Spent 127.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 19 [2018-06-22 05:58:32,506 INFO ]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:58:32,532 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:58:32,532 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 26 [2018-06-22 05:58:32,532 INFO ]: Interpolant automaton has 26 states [2018-06-22 05:58:32,532 INFO ]: Constructing interpolant automaton starting with 26 interpolants. [2018-06-22 05:58:32,532 INFO ]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2018-06-22 05:58:32,533 INFO ]: Start difference. First operand 22 states and 22 transitions. Second operand 26 states. [2018-06-22 05:58:32,800 WARN ]: Spent 118.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 21 [2018-06-22 05:58:32,960 WARN ]: Spent 148.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 24 [2018-06-22 05:58:33,128 WARN ]: Spent 154.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 24 [2018-06-22 05:58:33,280 WARN ]: Spent 139.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 23 [2018-06-22 05:58:33,427 WARN ]: Spent 131.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 27 [2018-06-22 05:58:33,685 WARN ]: Spent 199.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 26 [2018-06-22 05:58:33,868 WARN ]: Spent 165.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 25 [2018-06-22 05:58:34,758 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:58:34,758 INFO ]: Finished difference Result 27 states and 27 transitions. [2018-06-22 05:58:34,758 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-06-22 05:58:34,758 INFO ]: Start accepts. Automaton has 26 states. Word has length 21 [2018-06-22 05:58:34,758 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:58:34,759 INFO ]: With dead ends: 27 [2018-06-22 05:58:34,759 INFO ]: Without dead ends: 27 [2018-06-22 05:58:34,760 INFO ]: 0 DeclaredPredicates, 56 GetRequests, 7 SyntacticMatches, 6 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=582, Invalid=1398, Unknown=0, NotChecked=0, Total=1980 [2018-06-22 05:58:34,760 INFO ]: Start minimizeSevpa. Operand 27 states. [2018-06-22 05:58:34,762 INFO ]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-06-22 05:58:34,762 INFO ]: Start removeUnreachable. Operand 27 states. [2018-06-22 05:58:34,763 INFO ]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-06-22 05:58:34,763 INFO ]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 21 [2018-06-22 05:58:34,763 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:58:34,763 INFO ]: Abstraction has 27 states and 27 transitions. [2018-06-22 05:58:34,763 INFO ]: Interpolant automaton has 26 states. [2018-06-22 05:58:34,763 INFO ]: Start isEmpty. Operand 27 states and 27 transitions. [2018-06-22 05:58:34,763 INFO ]: Finished isEmpty. Found accepting run of length 27 [2018-06-22 05:58:34,763 INFO ]: Found error trace [2018-06-22 05:58:34,763 INFO ]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:58:34,763 INFO ]: === Iteration 11 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:58:34,764 INFO ]: Analyzing trace with hash 389545748, now seen corresponding path program 10 times [2018-06-22 05:58:34,764 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:58:34,764 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:58:34,764 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:58:34,764 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:58:34,764 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:58:34,848 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:58:35,486 WARN ]: Spent 358.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-06-22 05:58:35,772 WARN ]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-06-22 05:58:36,305 INFO ]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:58:36,305 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:58:36,305 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 05:58:36,311 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 05:58:36,397 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 05:58:36,397 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:58:36,407 INFO ]: Computing forward predicates... [2018-06-22 05:58:36,673 WARN ]: expecting exponential blowup for input size 9 [2018-06-22 05:58:45,075 WARN ]: Spent 135.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 19 [2018-06-22 05:58:46,805 INFO ]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:58:46,827 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:58:46,827 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2018-06-22 05:58:46,827 INFO ]: Interpolant automaton has 40 states [2018-06-22 05:58:46,827 INFO ]: Constructing interpolant automaton starting with 40 interpolants. [2018-06-22 05:58:46,828 INFO ]: CoverageRelationStatistics Valid=231, Invalid=1329, Unknown=0, NotChecked=0, Total=1560 [2018-06-22 05:58:46,828 INFO ]: Start difference. First operand 27 states and 27 transitions. Second operand 40 states. [2018-06-22 05:58:47,034 WARN ]: Spent 112.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 21 [2018-06-22 05:58:47,196 WARN ]: Spent 149.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 21 [2018-06-22 05:58:47,376 WARN ]: Spent 166.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 24 [2018-06-22 05:58:47,546 WARN ]: Spent 153.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 28 [2018-06-22 05:58:47,747 WARN ]: Spent 181.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 30 Received shutdown request... [2018-06-22 05:58:47,852 WARN ]: Removed 10 from assertion stack [2018-06-22 05:58:47,852 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 05:58:47,852 WARN ]: Verification canceled [2018-06-22 05:58:47,857 WARN ]: Timeout [2018-06-22 05:58:47,857 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 05:58:47 BoogieIcfgContainer [2018-06-22 05:58:47,857 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 05:58:47,858 INFO ]: Toolchain (without parser) took 56253.03 ms. Allocated memory was 303.6 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 258.1 MB in the beginning and 168.3 MB in the end (delta: 89.8 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-22 05:58:47,859 INFO ]: SmtParser took 0.12 ms. Allocated memory is still 303.6 MB. Free memory is still 269.2 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 05:58:47,859 INFO ]: ChcToBoogie took 60.18 ms. Allocated memory is still 303.6 MB. Free memory was 258.1 MB in the beginning and 256.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 05:58:47,860 INFO ]: Boogie Preprocessor took 49.51 ms. Allocated memory is still 303.6 MB. Free memory was 256.1 MB in the beginning and 255.1 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. [2018-06-22 05:58:47,860 INFO ]: RCFGBuilder took 229.50 ms. Allocated memory is still 303.6 MB. Free memory was 255.1 MB in the beginning and 246.0 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 3.6 GB. [2018-06-22 05:58:47,861 INFO ]: TraceAbstraction took 55894.84 ms. Allocated memory was 303.6 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 246.0 MB in the beginning and 168.3 MB in the end (delta: 77.8 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-22 05:58:47,865 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.12 ms. Allocated memory is still 303.6 MB. Free memory is still 269.2 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 60.18 ms. Allocated memory is still 303.6 MB. Free memory was 258.1 MB in the beginning and 256.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 49.51 ms. Allocated memory is still 303.6 MB. Free memory was 256.1 MB in the beginning and 255.1 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. * RCFGBuilder took 229.50 ms. Allocated memory is still 303.6 MB. Free memory was 255.1 MB in the beginning and 246.0 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 3.6 GB. * TraceAbstraction took 55894.84 ms. Allocated memory was 303.6 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 246.0 MB in the beginning and 168.3 MB in the end (delta: 77.8 MB). Peak memory consumption was 1.3 GB. 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 (27states) and interpolant automaton (currently 9 states, 40 states before enhancement), while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 64. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. TIMEOUT Result, 55.7s OverallTime, 11 OverallIterations, 19 TraceHistogramMax, 7.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 73 SDtfs, 50 SDslu, 327 SDs, 0 SdLazy, 130 SolverSat, 111 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 306 GetRequests, 76 SyntacticMatches, 26 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1515 ImplicationChecksByTransitivity, 16.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred in iteration=10, 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, 10 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 46.3s InterpolantComputationTime, 287 NumberOfCodeBlocks, 287 NumberOfCodeBlocksAsserted, 38 NumberOfCheckSat, 266 ConstructedInterpolants, 0 QuantifiedInterpolants, 36320 SizeOfPredicates, 40 NumberOfNonLiveVariables, 2210 ConjunctsInSsa, 607 ConjunctsInUnsatCore, 21 InterpolantComputations, 1 PerfectInterpolantSequences, 0/848 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/simple_nest.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_05-58-47-876.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/simple_nest.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_05-58-47-876.csv Completed graceful shutdown