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/sendmail-mime-fromqp.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 15:30:27,287 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 15:30:27,289 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 15:30:27,302 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 15:30:27,303 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 15:30:27,304 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 15:30:27,305 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 15:30:27,307 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 15:30:27,309 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 15:30:27,309 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 15:30:27,312 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 15:30:27,312 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 15:30:27,313 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 15:30:27,314 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 15:30:27,314 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 15:30:27,317 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 15:30:27,319 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 15:30:27,328 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 15:30:27,330 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 15:30:27,331 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 15:30:27,335 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 15:30:27,338 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 15:30:27,338 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 15:30:27,338 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 15:30:27,339 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 15:30:27,340 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 15:30:27,343 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 15:30:27,344 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 15:30:27,345 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 15:30:27,345 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 15:30:27,346 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 15:30:27,346 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 15:30:27,347 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 15:30:27,347 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 15:30:27,348 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 15:30:27,348 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 15:30:27,369 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 15:30:27,370 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 15:30:27,370 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 15:30:27,370 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 15:30:27,371 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 15:30:27,371 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 15:30:27,372 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 15:30:27,372 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 15:30:27,372 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 15:30:27,372 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 15:30:27,372 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 15:30:27,373 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 15:30:27,375 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 15:30:27,376 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 15:30:27,376 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 15:30:27,376 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 15:30:27,376 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 15:30:27,376 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 15:30:27,376 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 15:30:27,378 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 15:30:27,378 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 15:30:27,423 INFO ]: Repository-Root is: /tmp [2018-06-22 15:30:27,436 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 15:30:27,442 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 15:30:27,443 INFO ]: Initializing SmtParser... [2018-06-22 15:30:27,444 INFO ]: SmtParser initialized [2018-06-22 15:30:27,445 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/sendmail-mime-fromqp.c.smt2 [2018-06-22 15:30:27,446 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 15:30:27,531 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/sendmail-mime-fromqp.c.smt2 unknown [2018-06-22 15:30:27,873 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/sendmail-mime-fromqp.c.smt2 [2018-06-22 15:30:27,879 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 15:30:27,885 INFO ]: Walking toolchain with 4 elements. [2018-06-22 15:30:27,886 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 15:30:27,886 INFO ]: Initializing ChcToBoogie... [2018-06-22 15:30:27,886 INFO ]: ChcToBoogie initialized [2018-06-22 15:30:27,893 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 03:30:27" (1/1) ... [2018-06-22 15:30:27,941 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:30:27 Unit [2018-06-22 15:30:27,941 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 15:30:27,942 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 15:30:27,942 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 15:30:27,942 INFO ]: Boogie Preprocessor initialized [2018-06-22 15:30:27,962 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:30:27" (1/1) ... [2018-06-22 15:30:27,962 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:30:27" (1/1) ... [2018-06-22 15:30:27,982 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:30:27" (1/1) ... [2018-06-22 15:30:27,983 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:30:27" (1/1) ... [2018-06-22 15:30:27,997 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:30:27" (1/1) ... [2018-06-22 15:30:27,998 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:30:27" (1/1) ... [2018-06-22 15:30:27,999 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:30:27" (1/1) ... [2018-06-22 15:30:28,002 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 15:30:28,002 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 15:30:28,002 INFO ]: Initializing RCFGBuilder... [2018-06-22 15:30:28,002 INFO ]: RCFGBuilder initialized [2018-06-22 15:30:28,003 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:30:27" (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 15:30:28,027 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 15:30:28,027 INFO ]: Found specification of procedure False [2018-06-22 15:30:28,027 INFO ]: Found implementation of procedure False [2018-06-22 15:30:28,027 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 15:30:28,027 INFO ]: Found specification of procedure state [2018-06-22 15:30:28,027 INFO ]: Found implementation of procedure state [2018-06-22 15:30:28,027 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 15:30:28,027 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 15:30:28,027 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 15:30:28,290 INFO ]: Using library mode [2018-06-22 15:30:28,290 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 03:30:28 BoogieIcfgContainer [2018-06-22 15:30:28,290 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 15:30:28,292 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 15:30:28,292 INFO ]: Initializing TraceAbstraction... [2018-06-22 15:30:28,295 INFO ]: TraceAbstraction initialized [2018-06-22 15:30:28,295 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 03:30:27" (1/3) ... [2018-06-22 15:30:28,296 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@653b073d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 03:30:28, skipping insertion in model container [2018-06-22 15:30:28,296 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:30:27" (2/3) ... [2018-06-22 15:30:28,296 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@653b073d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 03:30:28, skipping insertion in model container [2018-06-22 15:30:28,296 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 03:30:28" (3/3) ... [2018-06-22 15:30:28,298 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 15:30:28,307 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 15:30:28,315 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 15:30:28,358 INFO ]: Using default assertion order modulation [2018-06-22 15:30:28,358 INFO ]: Interprodecural is true [2018-06-22 15:30:28,358 INFO ]: Hoare is false [2018-06-22 15:30:28,358 INFO ]: Compute interpolants for FPandBP [2018-06-22 15:30:28,358 INFO ]: Backedges is TWOTRACK [2018-06-22 15:30:28,358 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 15:30:28,358 INFO ]: Difference is false [2018-06-22 15:30:28,358 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 15:30:28,358 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 15:30:28,372 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 15:30:28,382 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 15:30:28,382 INFO ]: Found error trace [2018-06-22 15:30:28,383 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:30:28,383 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:30:28,396 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-22 15:30:28,398 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:30:28,399 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:30:28,438 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:30:28,438 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:30:28,438 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:30:28,472 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:30:28,617 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 15:30:28,620 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 15:30:28,621 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 15:30:28,622 INFO ]: Interpolant automaton has 4 states [2018-06-22 15:30:28,632 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 15:30:28,632 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 15:30:28,634 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 15:30:28,711 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:30:28,711 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 15:30:28,711 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 15:30:28,712 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 15:30:28,713 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:30:28,722 INFO ]: With dead ends: 13 [2018-06-22 15:30:28,722 INFO ]: Without dead ends: 13 [2018-06-22 15:30:28,724 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 15:30:28,741 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 15:30:28,774 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 15:30:28,775 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 15:30:28,776 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 15:30:28,777 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 15:30:28,777 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:30:28,777 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 15:30:28,777 INFO ]: Interpolant automaton has 4 states. [2018-06-22 15:30:28,777 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 15:30:28,779 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 15:30:28,779 INFO ]: Found error trace [2018-06-22 15:30:28,779 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:30:28,780 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:30:28,780 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-22 15:30:28,780 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:30:28,780 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:30:28,780 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:30:28,780 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:30:28,780 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:30:28,862 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:30:29,159 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 15:30:29,159 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:30:29,159 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 15:30:29,169 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:30:29,220 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:30:29,232 INFO ]: Computing forward predicates... [2018-06-22 15:30:29,478 WARN ]: Spent 134.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 4 [2018-06-22 15:30:29,950 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 15:30:29,984 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:30:29,984 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-06-22 15:30:29,984 INFO ]: Interpolant automaton has 9 states [2018-06-22 15:30:29,985 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 15:30:29,985 INFO ]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-06-22 15:30:29,985 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 9 states. [2018-06-22 15:30:30,434 WARN ]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-06-22 15:30:30,534 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:30:30,534 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 15:30:30,535 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 15:30:30,535 INFO ]: Start accepts. Automaton has 9 states. Word has length 13 [2018-06-22 15:30:30,535 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:30:30,536 INFO ]: With dead ends: 15 [2018-06-22 15:30:30,536 INFO ]: Without dead ends: 15 [2018-06-22 15:30:30,537 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2018-06-22 15:30:30,537 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 15:30:30,539 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 15:30:30,539 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 15:30:30,541 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 15:30:30,541 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 15:30:30,542 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:30:30,542 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 15:30:30,542 INFO ]: Interpolant automaton has 9 states. [2018-06-22 15:30:30,542 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 15:30:30,542 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 15:30:30,542 INFO ]: Found error trace [2018-06-22 15:30:30,542 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:30:30,542 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:30:30,543 INFO ]: Analyzing trace with hash -1486246934, now seen corresponding path program 2 times [2018-06-22 15:30:30,543 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:30:30,543 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:30:30,544 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:30:30,544 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:30:30,544 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:30:30,622 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:30:31,032 WARN ]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-06-22 15:30:31,034 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 15:30:31,034 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:30:31,034 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 15:30:31,053 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 15:30:31,131 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 15:30:31,131 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:30:31,135 INFO ]: Computing forward predicates... [2018-06-22 15:30:31,378 WARN ]: Spent 115.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 15 [2018-06-22 15:30:31,745 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 15:30:31,777 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:30:31,777 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2018-06-22 15:30:31,777 INFO ]: Interpolant automaton has 11 states [2018-06-22 15:30:31,777 INFO ]: Constructing interpolant automaton starting with 11 interpolants. [2018-06-22 15:30:31,778 INFO ]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-06-22 15:30:31,778 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 11 states. [2018-06-22 15:30:32,078 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:30:32,078 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 15:30:32,078 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 15:30:32,078 INFO ]: Start accepts. Automaton has 11 states. Word has length 17 [2018-06-22 15:30:32,078 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:30:32,079 INFO ]: With dead ends: 17 [2018-06-22 15:30:32,079 INFO ]: Without dead ends: 17 [2018-06-22 15:30:32,079 INFO ]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2018-06-22 15:30:32,079 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 15:30:32,082 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 15:30:32,082 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 15:30:32,083 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 15:30:32,083 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 15:30:32,083 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:30:32,083 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 15:30:32,083 INFO ]: Interpolant automaton has 11 states. [2018-06-22 15:30:32,083 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 15:30:32,084 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 15:30:32,084 INFO ]: Found error trace [2018-06-22 15:30:32,084 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:30:32,084 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:30:32,084 INFO ]: Analyzing trace with hash -2056434034, now seen corresponding path program 3 times [2018-06-22 15:30:32,084 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:30:32,084 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:30:32,085 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:30:32,085 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:30:32,085 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:30:32,132 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:30:32,485 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 15:30:32,485 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:30:32,485 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 15:30:32,496 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 15:30:32,540 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 15:30:32,540 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:30:32,544 INFO ]: Computing forward predicates... [2018-06-22 15:30:32,846 WARN ]: Spent 199.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 27 [2018-06-22 15:30:33,248 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 15:30:33,270 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:30:33,270 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2018-06-22 15:30:33,271 INFO ]: Interpolant automaton has 13 states [2018-06-22 15:30:33,271 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-22 15:30:33,271 INFO ]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2018-06-22 15:30:33,271 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 13 states. [2018-06-22 15:30:33,484 WARN ]: Spent 196.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 37 [2018-06-22 15:30:33,777 WARN ]: Spent 181.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2018-06-22 15:30:33,928 WARN ]: Spent 127.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2018-06-22 15:30:33,955 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:30:33,955 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-22 15:30:33,956 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 15:30:33,956 INFO ]: Start accepts. Automaton has 13 states. Word has length 21 [2018-06-22 15:30:33,956 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:30:33,958 INFO ]: With dead ends: 19 [2018-06-22 15:30:33,958 INFO ]: Without dead ends: 19 [2018-06-22 15:30:33,958 INFO ]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2018-06-22 15:30:33,958 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 15:30:33,961 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 15:30:33,962 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 15:30:33,962 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-22 15:30:33,962 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-22 15:30:33,962 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:30:33,962 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-22 15:30:33,962 INFO ]: Interpolant automaton has 13 states. [2018-06-22 15:30:33,962 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-22 15:30:33,963 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 15:30:33,963 INFO ]: Found error trace [2018-06-22 15:30:33,963 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:30:33,963 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:30:33,964 INFO ]: Analyzing trace with hash -434924750, now seen corresponding path program 4 times [2018-06-22 15:30:33,964 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:30:33,964 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:30:33,964 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:30:33,964 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:30:33,964 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:30:34,024 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:30:34,631 WARN ]: Spent 437.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-06-22 15:30:35,079 WARN ]: Spent 399.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2018-06-22 15:30:35,258 WARN ]: Spent 154.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2018-06-22 15:30:35,408 WARN ]: Spent 122.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2018-06-22 15:30:35,598 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 15:30:35,598 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:30:35,598 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 15:30:35,604 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 15:30:35,678 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 15:30:35,678 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:30:35,683 INFO ]: Computing forward predicates... [2018-06-22 15:30:38,034 WARN ]: Spent 1.79 s on a formula simplification. DAG size of input: 155 DAG size of output: 63 [2018-06-22 15:30:38,435 WARN ]: Spent 352.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2018-06-22 15:30:42,095 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 15:30:42,114 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:30:42,114 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2018-06-22 15:30:42,115 INFO ]: Interpolant automaton has 19 states [2018-06-22 15:30:42,115 INFO ]: Constructing interpolant automaton starting with 19 interpolants. [2018-06-22 15:30:42,115 INFO ]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2018-06-22 15:30:42,115 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 19 states. [2018-06-22 15:30:42,630 WARN ]: Spent 487.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 78 [2018-06-22 15:30:43,077 WARN ]: Spent 402.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 29 [2018-06-22 15:30:43,540 WARN ]: Spent 440.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 34 [2018-06-22 15:30:44,381 WARN ]: Spent 817.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 49 [2018-06-22 15:30:45,252 WARN ]: Spent 834.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 66 [2018-06-22 15:30:45,306 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:30:45,306 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-22 15:30:45,307 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 15:30:45,307 INFO ]: Start accepts. Automaton has 19 states. Word has length 25 [2018-06-22 15:30:45,307 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:30:45,308 INFO ]: With dead ends: 21 [2018-06-22 15:30:45,308 INFO ]: Without dead ends: 21 [2018-06-22 15:30:45,308 INFO ]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2018-06-22 15:30:45,308 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-22 15:30:45,311 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-22 15:30:45,311 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-22 15:30:45,312 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-22 15:30:45,312 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 25 [2018-06-22 15:30:45,312 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:30:45,312 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-22 15:30:45,312 INFO ]: Interpolant automaton has 19 states. [2018-06-22 15:30:45,312 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-22 15:30:45,313 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 15:30:45,313 INFO ]: Found error trace [2018-06-22 15:30:45,313 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:30:45,313 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:30:45,313 INFO ]: Analyzing trace with hash 1986427350, now seen corresponding path program 5 times [2018-06-22 15:30:45,313 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:30:45,313 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:30:45,314 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:30:45,314 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:30:45,314 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:30:45,421 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:30:45,805 WARN ]: Spent 146.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2018-06-22 15:30:46,128 WARN ]: Spent 250.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2018-06-22 15:30:46,242 WARN ]: Spent 103.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 36 [2018-06-22 15:30:46,650 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 15:30:46,650 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:30:46,650 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 15:30:46,657 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 15:30:46,773 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-06-22 15:30:46,773 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:30:46,779 INFO ]: Computing forward predicates... [2018-06-22 15:30:47,305 WARN ]: Spent 415.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2018-06-22 15:30:47,791 WARN ]: Spent 364.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2018-06-22 15:30:48,093 WARN ]: Spent 181.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2018-06-22 15:30:50,895 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 15:30:50,914 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:30:50,914 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2018-06-22 15:30:50,915 INFO ]: Interpolant automaton has 22 states [2018-06-22 15:30:50,915 INFO ]: Constructing interpolant automaton starting with 22 interpolants. [2018-06-22 15:30:50,915 INFO ]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2018-06-22 15:30:50,916 INFO ]: Start difference. First operand 21 states and 22 transitions. Second operand 22 states. [2018-06-22 15:30:52,518 WARN ]: Spent 1.54 s on a formula simplification. DAG size of input: 110 DAG size of output: 98 [2018-06-22 15:30:52,924 WARN ]: Spent 332.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 50 [2018-06-22 15:30:53,407 WARN ]: Spent 450.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 49 [2018-06-22 15:30:54,171 WARN ]: Spent 729.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 57 [2018-06-22 15:30:54,934 WARN ]: Spent 724.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 59 [2018-06-22 15:30:55,755 WARN ]: Spent 784.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 60 [2018-06-22 15:30:55,909 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:30:55,909 INFO ]: Finished difference Result 23 states and 24 transitions. [2018-06-22 15:30:55,910 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 15:30:55,910 INFO ]: Start accepts. Automaton has 22 states. Word has length 29 [2018-06-22 15:30:55,910 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:30:55,911 INFO ]: With dead ends: 23 [2018-06-22 15:30:55,911 INFO ]: Without dead ends: 23 [2018-06-22 15:30:55,911 INFO ]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=137, Invalid=619, Unknown=0, NotChecked=0, Total=756 [2018-06-22 15:30:55,911 INFO ]: Start minimizeSevpa. Operand 23 states. [2018-06-22 15:30:55,914 INFO ]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-06-22 15:30:55,914 INFO ]: Start removeUnreachable. Operand 23 states. [2018-06-22 15:30:55,915 INFO ]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-06-22 15:30:55,915 INFO ]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 29 [2018-06-22 15:30:55,915 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:30:55,915 INFO ]: Abstraction has 23 states and 24 transitions. [2018-06-22 15:30:55,915 INFO ]: Interpolant automaton has 22 states. [2018-06-22 15:30:55,915 INFO ]: Start isEmpty. Operand 23 states and 24 transitions. [2018-06-22 15:30:55,916 INFO ]: Finished isEmpty. Found accepting run of length 34 [2018-06-22 15:30:55,916 INFO ]: Found error trace [2018-06-22 15:30:55,916 INFO ]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:30:55,916 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:30:55,916 INFO ]: Analyzing trace with hash 800064122, now seen corresponding path program 6 times [2018-06-22 15:30:55,916 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:30:55,916 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:30:55,917 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:30:55,917 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:30:55,917 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:30:56,024 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:30:56,307 WARN ]: Spent 116.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 14 [2018-06-22 15:30:56,484 WARN ]: Spent 161.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2018-06-22 15:30:56,698 WARN ]: Spent 206.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2018-06-22 15:30:56,830 WARN ]: Spent 122.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2018-06-22 15:30:56,988 WARN ]: Spent 145.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2018-06-22 15:30:57,498 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 15:30:57,499 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:30:57,499 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:30:57,505 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 15:30:57,583 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-06-22 15:30:57,583 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:30:57,589 INFO ]: Computing forward predicates... [2018-06-22 15:30:59,029 WARN ]: Spent 1.06 s on a formula simplification. DAG size of input: 149 DAG size of output: 59 [2018-06-22 15:30:59,553 WARN ]: Spent 472.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 50 [2018-06-22 15:30:59,867 WARN ]: Spent 262.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2018-06-22 15:31:00,076 WARN ]: Spent 164.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2018-06-22 15:31:03,675 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 15:31:03,703 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:31:03,703 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 28 [2018-06-22 15:31:03,704 INFO ]: Interpolant automaton has 28 states [2018-06-22 15:31:03,704 INFO ]: Constructing interpolant automaton starting with 28 interpolants. [2018-06-22 15:31:03,704 INFO ]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2018-06-22 15:31:03,704 INFO ]: Start difference. First operand 23 states and 24 transitions. Second operand 28 states. [2018-06-22 15:31:05,589 WARN ]: Spent 1.84 s on a formula simplification. DAG size of input: 162 DAG size of output: 146 [2018-06-22 15:31:06,146 WARN ]: Spent 498.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 78 [2018-06-22 15:31:06,906 WARN ]: Spent 716.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 67 [2018-06-22 15:31:07,891 WARN ]: Spent 936.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 101 [2018-06-22 15:31:09,420 WARN ]: Spent 1.48 s on a formula simplification. DAG size of input: 168 DAG size of output: 82 [2018-06-22 15:31:10,899 WARN ]: Spent 1.39 s on a formula simplification. DAG size of input: 169 DAG size of output: 100 [2018-06-22 15:31:12,234 WARN ]: Spent 1.29 s on a formula simplification. DAG size of input: 168 DAG size of output: 92 [2018-06-22 15:31:12,326 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:31:12,327 INFO ]: Finished difference Result 25 states and 26 transitions. [2018-06-22 15:31:12,328 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-22 15:31:12,328 INFO ]: Start accepts. Automaton has 28 states. Word has length 33 [2018-06-22 15:31:12,329 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:31:12,329 INFO ]: With dead ends: 25 [2018-06-22 15:31:12,329 INFO ]: Without dead ends: 25 [2018-06-22 15:31:12,330 INFO ]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=193, Invalid=997, Unknown=0, NotChecked=0, Total=1190 [2018-06-22 15:31:12,330 INFO ]: Start minimizeSevpa. Operand 25 states. [2018-06-22 15:31:12,335 INFO ]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-06-22 15:31:12,335 INFO ]: Start removeUnreachable. Operand 25 states. [2018-06-22 15:31:12,335 INFO ]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-06-22 15:31:12,335 INFO ]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 33 [2018-06-22 15:31:12,335 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:31:12,335 INFO ]: Abstraction has 25 states and 26 transitions. [2018-06-22 15:31:12,336 INFO ]: Interpolant automaton has 28 states. [2018-06-22 15:31:12,336 INFO ]: Start isEmpty. Operand 25 states and 26 transitions. [2018-06-22 15:31:12,336 INFO ]: Finished isEmpty. Found accepting run of length 38 [2018-06-22 15:31:12,336 INFO ]: Found error trace [2018-06-22 15:31:12,336 INFO ]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:31:12,336 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:31:12,337 INFO ]: Analyzing trace with hash -411423458, now seen corresponding path program 7 times [2018-06-22 15:31:12,337 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:31:12,337 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:31:12,337 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:31:12,337 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:31:12,337 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:31:12,427 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:31:12,697 WARN ]: Spent 100.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 13 [2018-06-22 15:31:12,877 WARN ]: Spent 159.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2018-06-22 15:31:13,221 WARN ]: Spent 335.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2018-06-22 15:31:13,555 WARN ]: Spent 321.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2018-06-22 15:31:13,751 WARN ]: Spent 180.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 44 [2018-06-22 15:31:14,019 WARN ]: Spent 247.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2018-06-22 15:31:14,399 WARN ]: Spent 112.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2018-06-22 15:31:14,757 INFO ]: Checked inductivity of 105 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-22 15:31:14,757 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:31:14,757 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 15:31:14,765 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:31:14,846 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:31:14,854 INFO ]: Computing forward predicates... [2018-06-22 15:31:16,008 WARN ]: Spent 1.00 s on a formula simplification. DAG size of input: 110 DAG size of output: 78 [2018-06-22 15:31:17,199 WARN ]: Spent 1.09 s on a formula simplification. DAG size of input: 151 DAG size of output: 65 [2018-06-22 15:31:18,091 WARN ]: Spent 820.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 68 [2018-06-22 15:31:22,486 WARN ]: Spent 4.16 s on a formula simplification. DAG size of input: 250 DAG size of output: 119 [2018-06-22 15:31:22,693 WARN ]: Spent 150.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown