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-close-angle.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 15:29:17,881 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 15:29:17,883 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 15:29:17,894 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 15:29:17,894 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 15:29:17,895 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 15:29:17,896 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 15:29:17,900 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 15:29:17,901 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 15:29:17,902 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 15:29:17,904 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 15:29:17,904 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 15:29:17,905 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 15:29:17,906 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 15:29:17,907 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 15:29:17,908 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 15:29:17,911 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 15:29:17,913 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 15:29:17,927 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 15:29:17,928 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 15:29:17,929 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 15:29:17,931 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 15:29:17,931 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 15:29:17,931 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 15:29:17,932 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 15:29:17,932 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 15:29:17,933 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 15:29:17,934 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 15:29:17,935 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 15:29:17,939 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 15:29:17,940 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 15:29:17,941 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 15:29:17,941 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 15:29:17,942 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 15:29:17,942 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 15:29:17,942 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 15:29:17,961 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 15:29:17,961 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 15:29:17,962 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 15:29:17,963 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 15:29:17,964 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 15:29:17,964 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 15:29:17,964 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 15:29:17,964 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 15:29:17,964 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 15:29:17,965 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 15:29:17,965 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 15:29:17,965 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 15:29:17,965 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 15:29:17,965 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 15:29:17,965 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 15:29:17,966 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 15:29:17,966 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 15:29:17,966 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 15:29:17,966 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 15:29:17,969 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 15:29:17,970 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 15:29:18,014 INFO ]: Repository-Root is: /tmp [2018-06-22 15:29:18,026 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 15:29:18,031 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 15:29:18,032 INFO ]: Initializing SmtParser... [2018-06-22 15:29:18,033 INFO ]: SmtParser initialized [2018-06-22 15:29:18,033 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/sendmail-close-angle.c.smt2 [2018-06-22 15:29:18,034 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 15:29:18,116 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/sendmail-close-angle.c.smt2 unknown [2018-06-22 15:29:18,392 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/sendmail-close-angle.c.smt2 [2018-06-22 15:29:18,398 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 15:29:18,410 INFO ]: Walking toolchain with 4 elements. [2018-06-22 15:29:18,410 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 15:29:18,410 INFO ]: Initializing ChcToBoogie... [2018-06-22 15:29:18,411 INFO ]: ChcToBoogie initialized [2018-06-22 15:29:18,414 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 03:29:18" (1/1) ... [2018-06-22 15:29:18,461 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:29:18 Unit [2018-06-22 15:29:18,461 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 15:29:18,461 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 15:29:18,462 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 15:29:18,462 INFO ]: Boogie Preprocessor initialized [2018-06-22 15:29:18,484 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:29:18" (1/1) ... [2018-06-22 15:29:18,484 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:29:18" (1/1) ... [2018-06-22 15:29:18,506 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:29:18" (1/1) ... [2018-06-22 15:29:18,506 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:29:18" (1/1) ... [2018-06-22 15:29:18,512 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:29:18" (1/1) ... [2018-06-22 15:29:18,513 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:29:18" (1/1) ... [2018-06-22 15:29:18,524 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:29:18" (1/1) ... [2018-06-22 15:29:18,527 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 15:29:18,527 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 15:29:18,527 INFO ]: Initializing RCFGBuilder... [2018-06-22 15:29:18,527 INFO ]: RCFGBuilder initialized [2018-06-22 15:29:18,528 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:29:18" (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 15:29:18,542 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 15:29:18,542 INFO ]: Found specification of procedure False [2018-06-22 15:29:18,542 INFO ]: Found implementation of procedure False [2018-06-22 15:29:18,542 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 15:29:18,542 INFO ]: Found specification of procedure state [2018-06-22 15:29:18,542 INFO ]: Found implementation of procedure state [2018-06-22 15:29:18,542 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 15:29:18,543 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 15:29:18,543 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 15:29:18,842 INFO ]: Using library mode [2018-06-22 15:29:18,842 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 03:29:18 BoogieIcfgContainer [2018-06-22 15:29:18,842 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 15:29:18,844 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 15:29:18,844 INFO ]: Initializing TraceAbstraction... [2018-06-22 15:29:18,847 INFO ]: TraceAbstraction initialized [2018-06-22 15:29:18,847 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 03:29:18" (1/3) ... [2018-06-22 15:29:18,848 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75a6d8e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 03:29:18, skipping insertion in model container [2018-06-22 15:29:18,848 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:29:18" (2/3) ... [2018-06-22 15:29:18,848 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75a6d8e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 03:29:18, skipping insertion in model container [2018-06-22 15:29:18,848 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 03:29:18" (3/3) ... [2018-06-22 15:29:18,850 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 15:29:18,858 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 15:29:18,869 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 15:29:18,915 INFO ]: Using default assertion order modulation [2018-06-22 15:29:18,918 INFO ]: Interprodecural is true [2018-06-22 15:29:18,918 INFO ]: Hoare is false [2018-06-22 15:29:18,918 INFO ]: Compute interpolants for FPandBP [2018-06-22 15:29:18,918 INFO ]: Backedges is TWOTRACK [2018-06-22 15:29:18,918 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 15:29:18,918 INFO ]: Difference is false [2018-06-22 15:29:18,918 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 15:29:18,918 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 15:29:18,934 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 15:29:18,946 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 15:29:18,946 INFO ]: Found error trace [2018-06-22 15:29:18,947 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:29:18,947 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:29:18,953 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-22 15:29:18,955 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:29:18,955 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:29:19,001 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:29:19,001 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:29:19,001 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:29:19,037 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:29:19,291 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 15:29:19,293 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 15:29:19,293 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 15:29:19,294 INFO ]: Interpolant automaton has 4 states [2018-06-22 15:29:19,304 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 15:29:19,304 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 15:29:19,306 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 15:29:19,426 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:29:19,426 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 15:29:19,427 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 15:29:19,427 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 15:29:19,428 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:29:19,437 INFO ]: With dead ends: 13 [2018-06-22 15:29:19,437 INFO ]: Without dead ends: 13 [2018-06-22 15:29:19,438 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 15:29:19,450 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 15:29:19,468 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 15:29:19,469 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 15:29:19,470 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 15:29:19,471 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 15:29:19,471 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:29:19,471 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 15:29:19,471 INFO ]: Interpolant automaton has 4 states. [2018-06-22 15:29:19,471 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 15:29:19,472 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 15:29:19,472 INFO ]: Found error trace [2018-06-22 15:29:19,472 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:29:19,473 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:29:19,473 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-22 15:29:19,473 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:29:19,473 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:29:19,474 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:29:19,474 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:29:19,474 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:29:19,547 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:29:19,793 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 15:29:19,793 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:29:19,793 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 15:29:19,801 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:29:19,855 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:29:19,866 INFO ]: Computing forward predicates... [2018-06-22 15:29:20,675 WARN ]: Spent 653.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 15 [2018-06-22 15:29:21,137 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 15:29:21,171 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:29:21,171 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-06-22 15:29:21,171 INFO ]: Interpolant automaton has 9 states [2018-06-22 15:29:21,172 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 15:29:21,172 INFO ]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-06-22 15:29:21,172 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 9 states. [2018-06-22 15:29:21,523 WARN ]: Spent 283.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 18 [2018-06-22 15:29:22,075 WARN ]: Spent 409.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 21 [2018-06-22 15:29:22,179 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:29:22,179 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 15:29:22,180 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 15:29:22,180 INFO ]: Start accepts. Automaton has 9 states. Word has length 13 [2018-06-22 15:29:22,180 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:29:22,180 INFO ]: With dead ends: 15 [2018-06-22 15:29:22,180 INFO ]: Without dead ends: 15 [2018-06-22 15:29:22,181 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2018-06-22 15:29:22,181 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 15:29:22,183 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 15:29:22,183 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 15:29:22,184 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 15:29:22,184 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 15:29:22,184 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:29:22,184 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 15:29:22,184 INFO ]: Interpolant automaton has 9 states. [2018-06-22 15:29:22,184 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 15:29:22,185 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 15:29:22,185 INFO ]: Found error trace [2018-06-22 15:29:22,185 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:29:22,185 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:29:22,185 INFO ]: Analyzing trace with hash -1486246934, now seen corresponding path program 2 times [2018-06-22 15:29:22,185 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:29:22,185 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:29:22,186 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:29:22,186 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:29:22,186 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:29:22,247 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:29:22,609 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 15:29:22,609 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:29:22,609 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:29:22,621 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 15:29:22,671 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 15:29:22,671 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:29:22,675 INFO ]: Computing forward predicates... [2018-06-22 15:29:22,908 WARN ]: Spent 106.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 17 [2018-06-22 15:29:23,202 WARN ]: Spent 215.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 23 [2018-06-22 15:29:23,596 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 15:29:23,617 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:29:23,617 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2018-06-22 15:29:23,617 INFO ]: Interpolant automaton has 11 states [2018-06-22 15:29:23,618 INFO ]: Constructing interpolant automaton starting with 11 interpolants. [2018-06-22 15:29:23,618 INFO ]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2018-06-22 15:29:23,618 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 11 states. [2018-06-22 15:29:23,831 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:29:23,831 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 15:29:23,832 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 15:29:23,832 INFO ]: Start accepts. Automaton has 11 states. Word has length 17 [2018-06-22 15:29:23,832 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:29:23,832 INFO ]: With dead ends: 17 [2018-06-22 15:29:23,832 INFO ]: Without dead ends: 17 [2018-06-22 15:29:23,833 INFO ]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2018-06-22 15:29:23,833 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 15:29:23,836 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 15:29:23,836 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 15:29:23,836 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 15:29:23,836 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 15:29:23,837 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:29:23,837 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 15:29:23,837 INFO ]: Interpolant automaton has 11 states. [2018-06-22 15:29:23,837 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 15:29:23,837 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 15:29:23,837 INFO ]: Found error trace [2018-06-22 15:29:23,837 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:29:23,838 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:29:23,838 INFO ]: Analyzing trace with hash -2056434034, now seen corresponding path program 3 times [2018-06-22 15:29:23,838 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:29:23,838 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:29:23,838 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:29:23,839 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:29:23,839 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:29:23,907 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:29:24,933 WARN ]: Spent 852.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2018-06-22 15:29:25,307 WARN ]: Spent 317.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2018-06-22 15:29:25,650 WARN ]: Spent 329.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2018-06-22 15:29:25,866 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 15:29:25,866 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:29:25,866 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 15:29:25,880 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 15:29:25,979 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 15:29:25,979 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:29:25,984 INFO ]: Computing forward predicates... [2018-06-22 15:29:26,413 WARN ]: Spent 221.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 26 [2018-06-22 15:29:28,622 WARN ]: Spent 429.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-06-22 15:29:28,640 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 15:29:28,673 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:29:28,673 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2018-06-22 15:29:28,674 INFO ]: Interpolant automaton has 13 states [2018-06-22 15:29:28,674 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-22 15:29:28,674 INFO ]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2018-06-22 15:29:28,674 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 13 states. [2018-06-22 15:29:29,277 WARN ]: Spent 389.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2018-06-22 15:29:29,571 WARN ]: Spent 170.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 29 [2018-06-22 15:29:29,873 WARN ]: Spent 278.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 28 [2018-06-22 15:29:29,896 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:29:29,896 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-22 15:29:29,897 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 15:29:29,897 INFO ]: Start accepts. Automaton has 13 states. Word has length 21 [2018-06-22 15:29:29,897 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:29:29,898 INFO ]: With dead ends: 19 [2018-06-22 15:29:29,898 INFO ]: Without dead ends: 19 [2018-06-22 15:29:29,898 INFO ]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2018-06-22 15:29:29,898 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 15:29:29,901 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 15:29:29,901 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 15:29:29,901 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-22 15:29:29,901 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-22 15:29:29,901 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:29:29,902 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-22 15:29:29,902 INFO ]: Interpolant automaton has 13 states. [2018-06-22 15:29:29,902 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-22 15:29:29,902 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 15:29:29,902 INFO ]: Found error trace [2018-06-22 15:29:29,902 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:29:29,902 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:29:29,902 INFO ]: Analyzing trace with hash -434924750, now seen corresponding path program 4 times [2018-06-22 15:29:29,903 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:29:29,903 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:29:29,903 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:29:29,903 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:29:29,903 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:29:29,975 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:29:30,778 WARN ]: Spent 633.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-06-22 15:29:31,067 WARN ]: Spent 117.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2018-06-22 15:29:31,314 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 15:29:31,314 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:29:31,314 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 15:29:31,320 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 15:29:31,386 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 15:29:31,386 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:29:31,391 INFO ]: Computing forward predicates... [2018-06-22 15:29:31,818 WARN ]: Spent 355.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2018-06-22 15:29:32,151 WARN ]: Spent 284.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 25 [2018-06-22 15:29:32,297 WARN ]: Spent 112.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 23 [2018-06-22 15:29:32,525 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 15:29:32,556 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:29:32,556 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2018-06-22 15:29:32,556 INFO ]: Interpolant automaton has 18 states [2018-06-22 15:29:32,557 INFO ]: Constructing interpolant automaton starting with 18 interpolants. [2018-06-22 15:29:32,557 INFO ]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2018-06-22 15:29:32,557 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 18 states. [2018-06-22 15:29:32,897 WARN ]: Spent 221.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2018-06-22 15:29:33,196 WARN ]: Spent 188.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2018-06-22 15:29:33,523 WARN ]: Spent 230.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2018-06-22 15:29:33,682 WARN ]: Spent 141.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 28 [2018-06-22 15:29:33,718 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:29:33,718 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-22 15:29:33,719 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 15:29:33,719 INFO ]: Start accepts. Automaton has 18 states. Word has length 25 [2018-06-22 15:29:33,719 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:29:33,720 INFO ]: With dead ends: 21 [2018-06-22 15:29:33,720 INFO ]: Without dead ends: 21 [2018-06-22 15:29:33,720 INFO ]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2018-06-22 15:29:33,720 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-22 15:29:33,723 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-22 15:29:33,723 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-22 15:29:33,724 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-22 15:29:33,724 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 25 [2018-06-22 15:29:33,724 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:29:33,724 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-22 15:29:33,724 INFO ]: Interpolant automaton has 18 states. [2018-06-22 15:29:33,724 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-22 15:29:33,725 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 15:29:33,725 INFO ]: Found error trace [2018-06-22 15:29:33,725 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:29:33,725 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:29:33,725 INFO ]: Analyzing trace with hash 1986427350, now seen corresponding path program 5 times [2018-06-22 15:29:33,725 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:29:33,725 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:29:33,726 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:29:33,726 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:29:33,726 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:29:33,798 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:29:34,048 WARN ]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2018-06-22 15:29:34,437 WARN ]: Spent 122.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2018-06-22 15:29:34,593 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 15:29:34,593 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:29:34,593 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) [2018-06-22 15:29:34,607 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:29:34,678 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-06-22 15:29:34,679 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:29:34,683 INFO ]: Computing forward predicates... [2018-06-22 15:29:34,870 WARN ]: Spent 100.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2018-06-22 15:29:35,096 WARN ]: Spent 119.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2018-06-22 15:29:35,399 WARN ]: Spent 178.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 26 [2018-06-22 15:29:35,636 WARN ]: Spent 177.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 27 [2018-06-22 15:29:36,376 WARN ]: Spent 484.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 30 [2018-06-22 15:29:36,644 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 15:29:36,663 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:29:36,663 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2018-06-22 15:29:36,663 INFO ]: Interpolant automaton has 21 states [2018-06-22 15:29:36,664 INFO ]: Constructing interpolant automaton starting with 21 interpolants. [2018-06-22 15:29:36,664 INFO ]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2018-06-22 15:29:36,664 INFO ]: Start difference. First operand 21 states and 22 transitions. Second operand 21 states. [2018-06-22 15:29:37,092 WARN ]: Spent 401.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2018-06-22 15:29:37,242 WARN ]: Spent 108.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 23 [2018-06-22 15:29:37,518 WARN ]: Spent 235.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 31 [2018-06-22 15:29:37,727 WARN ]: Spent 185.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 33 [2018-06-22 15:29:38,018 WARN ]: Spent 269.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 32 [2018-06-22 15:29:38,323 WARN ]: Spent 284.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 35 [2018-06-22 15:29:38,460 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:29:38,460 INFO ]: Finished difference Result 23 states and 24 transitions. [2018-06-22 15:29:38,467 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 15:29:38,467 INFO ]: Start accepts. Automaton has 21 states. Word has length 29 [2018-06-22 15:29:38,468 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:29:38,468 INFO ]: With dead ends: 23 [2018-06-22 15:29:38,468 INFO ]: Without dead ends: 23 [2018-06-22 15:29:38,469 INFO ]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2018-06-22 15:29:38,469 INFO ]: Start minimizeSevpa. Operand 23 states. [2018-06-22 15:29:38,472 INFO ]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-06-22 15:29:38,472 INFO ]: Start removeUnreachable. Operand 23 states. [2018-06-22 15:29:38,472 INFO ]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-06-22 15:29:38,472 INFO ]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 29 [2018-06-22 15:29:38,473 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:29:38,473 INFO ]: Abstraction has 23 states and 24 transitions. [2018-06-22 15:29:38,473 INFO ]: Interpolant automaton has 21 states. [2018-06-22 15:29:38,473 INFO ]: Start isEmpty. Operand 23 states and 24 transitions. [2018-06-22 15:29:38,473 INFO ]: Finished isEmpty. Found accepting run of length 34 [2018-06-22 15:29:38,473 INFO ]: Found error trace [2018-06-22 15:29:38,473 INFO ]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:29:38,474 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:29:38,474 INFO ]: Analyzing trace with hash 800064122, now seen corresponding path program 6 times [2018-06-22 15:29:38,474 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:29:38,474 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:29:38,474 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:29:38,474 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:29:38,474 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:29:38,549 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:29:38,775 WARN ]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-06-22 15:29:39,235 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 15:29:39,235 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:29:39,235 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 15:29:39,241 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 15:29:39,321 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-06-22 15:29:39,321 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:29:39,327 INFO ]: Computing forward predicates... [2018-06-22 15:29:39,699 WARN ]: Spent 233.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2018-06-22 15:29:39,857 WARN ]: Spent 120.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2018-06-22 15:29:40,085 WARN ]: Spent 170.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 26 [2018-06-22 15:29:40,384 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 15:29:40,411 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:29:40,411 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 21 [2018-06-22 15:29:40,412 INFO ]: Interpolant automaton has 21 states [2018-06-22 15:29:40,412 INFO ]: Constructing interpolant automaton starting with 21 interpolants. [2018-06-22 15:29:40,412 INFO ]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2018-06-22 15:29:40,412 INFO ]: Start difference. First operand 23 states and 24 transitions. Second operand 21 states. [2018-06-22 15:29:40,711 WARN ]: Spent 274.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2018-06-22 15:29:40,869 WARN ]: Spent 120.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 24 [2018-06-22 15:29:41,096 WARN ]: Spent 198.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 32 [2018-06-22 15:29:41,285 WARN ]: Spent 160.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 31 [2018-06-22 15:29:41,461 WARN ]: Spent 152.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 28 [2018-06-22 15:29:41,725 WARN ]: Spent 242.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 29 [2018-06-22 15:29:41,903 WARN ]: Spent 152.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 29 [2018-06-22 15:29:41,937 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:29:41,937 INFO ]: Finished difference Result 25 states and 26 transitions. [2018-06-22 15:29:41,937 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-22 15:29:41,937 INFO ]: Start accepts. Automaton has 21 states. Word has length 33 [2018-06-22 15:29:41,938 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:29:41,938 INFO ]: With dead ends: 25 [2018-06-22 15:29:41,938 INFO ]: Without dead ends: 25 [2018-06-22 15:29:41,939 INFO ]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2018-06-22 15:29:41,939 INFO ]: Start minimizeSevpa. Operand 25 states. [2018-06-22 15:29:41,942 INFO ]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-06-22 15:29:41,942 INFO ]: Start removeUnreachable. Operand 25 states. [2018-06-22 15:29:41,943 INFO ]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-06-22 15:29:41,943 INFO ]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 33 [2018-06-22 15:29:41,943 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:29:41,943 INFO ]: Abstraction has 25 states and 26 transitions. [2018-06-22 15:29:41,943 INFO ]: Interpolant automaton has 21 states. [2018-06-22 15:29:41,943 INFO ]: Start isEmpty. Operand 25 states and 26 transitions. [2018-06-22 15:29:41,944 INFO ]: Finished isEmpty. Found accepting run of length 38 [2018-06-22 15:29:41,944 INFO ]: Found error trace [2018-06-22 15:29:41,944 INFO ]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:29:41,944 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:29:41,944 INFO ]: Analyzing trace with hash -411423458, now seen corresponding path program 7 times [2018-06-22 15:29:41,944 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:29:41,944 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:29:41,945 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:29:41,945 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:29:41,945 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:29:42,022 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:29:42,424 WARN ]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-06-22 15:29:42,727 WARN ]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2018-06-22 15:29:43,009 WARN ]: Spent 117.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2018-06-22 15:29:43,369 INFO ]: Checked inductivity of 105 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-22 15:29:43,370 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:29:43,370 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 15:29:43,376 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:29:43,459 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:29:43,465 INFO ]: Computing forward predicates... [2018-06-22 15:29:43,691 WARN ]: Spent 116.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2018-06-22 15:29:43,863 WARN ]: Spent 119.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2018-06-22 15:29:44,079 WARN ]: Spent 170.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 26 [2018-06-22 15:29:44,476 INFO ]: Checked inductivity of 105 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-22 15:29:44,496 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:29:44,496 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 23 [2018-06-22 15:29:44,496 INFO ]: Interpolant automaton has 23 states [2018-06-22 15:29:44,496 INFO ]: Constructing interpolant automaton starting with 23 interpolants. [2018-06-22 15:29:44,496 INFO ]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2018-06-22 15:29:44,497 INFO ]: Start difference. First operand 25 states and 26 transitions. Second operand 23 states. [2018-06-22 15:29:44,848 WARN ]: Spent 319.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2018-06-22 15:29:45,185 WARN ]: Spent 185.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 33 [2018-06-22 15:29:45,348 WARN ]: Spent 138.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 32 [2018-06-22 15:29:45,540 WARN ]: Spent 165.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 29 [2018-06-22 15:29:45,693 WARN ]: Spent 130.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 31 [2018-06-22 15:29:45,876 WARN ]: Spent 111.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 29 [2018-06-22 15:29:46,037 WARN ]: Spent 138.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 30 [2018-06-22 15:29:46,087 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:29:46,087 INFO ]: Finished difference Result 27 states and 28 transitions. [2018-06-22 15:29:46,088 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-06-22 15:29:46,088 INFO ]: Start accepts. Automaton has 23 states. Word has length 37 [2018-06-22 15:29:46,088 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:29:46,088 INFO ]: With dead ends: 27 [2018-06-22 15:29:46,088 INFO ]: Without dead ends: 27 [2018-06-22 15:29:46,089 INFO ]: 0 DeclaredPredicates, 62 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=170, Invalid=760, Unknown=0, NotChecked=0, Total=930 [2018-06-22 15:29:46,089 INFO ]: Start minimizeSevpa. Operand 27 states. [2018-06-22 15:29:46,092 INFO ]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-06-22 15:29:46,092 INFO ]: Start removeUnreachable. Operand 27 states. [2018-06-22 15:29:46,093 INFO ]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-06-22 15:29:46,093 INFO ]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 37 [2018-06-22 15:29:46,093 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:29:46,093 INFO ]: Abstraction has 27 states and 28 transitions. [2018-06-22 15:29:46,093 INFO ]: Interpolant automaton has 23 states. [2018-06-22 15:29:46,093 INFO ]: Start isEmpty. Operand 27 states and 28 transitions. [2018-06-22 15:29:46,094 INFO ]: Finished isEmpty. Found accepting run of length 42 [2018-06-22 15:29:46,094 INFO ]: Found error trace [2018-06-22 15:29:46,095 INFO ]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:29:46,095 INFO ]: === Iteration 9 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:29:46,095 INFO ]: Analyzing trace with hash -544278078, now seen corresponding path program 8 times [2018-06-22 15:29:46,095 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:29:46,095 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:29:46,095 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:29:46,095 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:29:46,095 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:29:46,213 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:29:46,584 WARN ]: Spent 140.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2018-06-22 15:29:46,779 WARN ]: Spent 106.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2018-06-22 15:29:47,044 WARN ]: Spent 104.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2018-06-22 15:29:47,584 INFO ]: Checked inductivity of 136 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-06-22 15:29:47,584 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:29:47,584 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:29:47,591 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 15:29:47,693 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 15:29:47,693 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:29:47,701 INFO ]: Computing forward predicates... [2018-06-22 15:29:48,012 WARN ]: Spent 139.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2018-06-22 15:29:48,246 WARN ]: Spent 158.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 30 [2018-06-22 15:29:48,635 WARN ]: Spent 125.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2018-06-22 15:29:48,878 WARN ]: Spent 174.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 26 [2018-06-22 15:29:51,648 WARN ]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-06-22 15:29:52,629 INFO ]: Checked inductivity of 136 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-06-22 15:29:52,649 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:29:52,649 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 32 [2018-06-22 15:29:52,650 INFO ]: Interpolant automaton has 32 states [2018-06-22 15:29:52,650 INFO ]: Constructing interpolant automaton starting with 32 interpolants. [2018-06-22 15:29:52,650 INFO ]: CoverageRelationStatistics Valid=80, Invalid=912, Unknown=0, NotChecked=0, Total=992 [2018-06-22 15:29:52,650 INFO ]: Start difference. First operand 27 states and 28 transitions. Second operand 32 states. [2018-06-22 15:29:53,251 WARN ]: Spent 558.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 66 [2018-06-22 15:29:53,474 WARN ]: Spent 169.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 25 [2018-06-22 15:29:53,746 WARN ]: Spent 238.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 39 [2018-06-22 15:29:54,057 WARN ]: Spent 263.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 45 [2018-06-22 15:29:54,339 WARN ]: Spent 248.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 41 [2018-06-22 15:29:54,626 WARN ]: Spent 251.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 42 [2018-06-22 15:29:54,910 WARN ]: Spent 249.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 44 [2018-06-22 15:29:55,250 WARN ]: Spent 292.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 41 [2018-06-22 15:29:55,628 WARN ]: Spent 294.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 45 [2018-06-22 15:29:55,674 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:29:55,674 INFO ]: Finished difference Result 29 states and 30 transitions. [2018-06-22 15:29:55,674 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-06-22 15:29:55,674 INFO ]: Start accepts. Automaton has 32 states. Word has length 41 [2018-06-22 15:29:55,674 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:29:55,675 INFO ]: With dead ends: 29 [2018-06-22 15:29:55,675 INFO ]: Without dead ends: 29 [2018-06-22 15:29:55,675 INFO ]: 0 DeclaredPredicates, 69 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=248, Invalid=1392, Unknown=0, NotChecked=0, Total=1640 [2018-06-22 15:29:55,675 INFO ]: Start minimizeSevpa. Operand 29 states. [2018-06-22 15:29:55,679 INFO ]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-06-22 15:29:55,679 INFO ]: Start removeUnreachable. Operand 29 states. [2018-06-22 15:29:55,683 INFO ]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-06-22 15:29:55,683 INFO ]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 41 [2018-06-22 15:29:55,683 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:29:55,683 INFO ]: Abstraction has 29 states and 30 transitions. [2018-06-22 15:29:55,683 INFO ]: Interpolant automaton has 32 states. [2018-06-22 15:29:55,683 INFO ]: Start isEmpty. Operand 29 states and 30 transitions. [2018-06-22 15:29:55,684 INFO ]: Finished isEmpty. Found accepting run of length 46 [2018-06-22 15:29:55,684 INFO ]: Found error trace [2018-06-22 15:29:55,684 INFO ]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:29:55,684 INFO ]: === Iteration 10 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:29:55,684 INFO ]: Analyzing trace with hash 1442343014, now seen corresponding path program 9 times [2018-06-22 15:29:55,684 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:29:55,684 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:29:55,685 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:29:55,685 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:29:55,685 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:29:55,779 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:29:56,054 WARN ]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-06-22 15:29:56,248 WARN ]: Spent 100.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2018-06-22 15:29:56,554 WARN ]: Spent 102.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 29 [2018-06-22 15:29:57,131 INFO ]: Checked inductivity of 171 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-06-22 15:29:57,131 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:29:57,131 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:29:57,137 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 15:29:57,334 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-06-22 15:29:57,334 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:29:57,351 INFO ]: Computing forward predicates... [2018-06-22 15:29:58,101 WARN ]: Spent 617.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2018-06-22 15:29:58,583 WARN ]: Spent 144.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2018-06-22 15:29:58,837 WARN ]: Spent 200.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 29 [2018-06-22 15:29:59,226 WARN ]: Spent 126.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2018-06-22 15:29:59,574 WARN ]: Spent 275.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 25 [2018-06-22 15:30:01,670 INFO ]: Checked inductivity of 171 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-06-22 15:30:01,690 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:30:01,691 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 36 [2018-06-22 15:30:01,691 INFO ]: Interpolant automaton has 36 states [2018-06-22 15:30:01,691 INFO ]: Constructing interpolant automaton starting with 36 interpolants. [2018-06-22 15:30:01,691 INFO ]: CoverageRelationStatistics Valid=90, Invalid=1170, Unknown=0, NotChecked=0, Total=1260 [2018-06-22 15:30:01,692 INFO ]: Start difference. First operand 29 states and 30 transitions. Second operand 36 states. [2018-06-22 15:30:02,533 WARN ]: Spent 791.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 79 [2018-06-22 15:30:02,999 WARN ]: Spent 310.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 30 [2018-06-22 15:30:03,387 WARN ]: Spent 348.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 43 [2018-06-22 15:30:03,766 WARN ]: Spent 317.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 43 [2018-06-22 15:30:04,192 WARN ]: Spent 388.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 42 [2018-06-22 15:30:04,766 WARN ]: Spent 536.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 43 [2018-06-22 15:30:05,220 WARN ]: Spent 415.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 42 [2018-06-22 15:30:05,856 WARN ]: Spent 596.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 55 [2018-06-22 15:30:06,343 WARN ]: Spent 439.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 46 [2018-06-22 15:30:06,972 WARN ]: Spent 586.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 57 [2018-06-22 15:30:07,028 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:30:07,028 INFO ]: Finished difference Result 31 states and 32 transitions. [2018-06-22 15:30:07,029 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-06-22 15:30:07,029 INFO ]: Start accepts. Automaton has 36 states. Word has length 45 [2018-06-22 15:30:07,029 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:30:07,030 INFO ]: With dead ends: 31 [2018-06-22 15:30:07,030 INFO ]: Without dead ends: 31 [2018-06-22 15:30:07,030 INFO ]: 0 DeclaredPredicates, 76 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=298, Invalid=1772, Unknown=0, NotChecked=0, Total=2070 [2018-06-22 15:30:07,030 INFO ]: Start minimizeSevpa. Operand 31 states. [2018-06-22 15:30:07,033 INFO ]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-06-22 15:30:07,033 INFO ]: Start removeUnreachable. Operand 31 states. [2018-06-22 15:30:07,034 INFO ]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-06-22 15:30:07,034 INFO ]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 45 [2018-06-22 15:30:07,034 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:30:07,034 INFO ]: Abstraction has 31 states and 32 transitions. [2018-06-22 15:30:07,034 INFO ]: Interpolant automaton has 36 states. [2018-06-22 15:30:07,034 INFO ]: Start isEmpty. Operand 31 states and 32 transitions. [2018-06-22 15:30:07,035 INFO ]: Finished isEmpty. Found accepting run of length 50 [2018-06-22 15:30:07,035 INFO ]: Found error trace [2018-06-22 15:30:07,035 INFO ]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:30:07,035 INFO ]: === Iteration 11 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:30:07,035 INFO ]: Analyzing trace with hash 352352522, now seen corresponding path program 10 times [2018-06-22 15:30:07,035 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:30:07,035 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:30:07,036 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:30:07,036 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:30:07,036 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:30:07,191 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:30:07,515 WARN ]: Spent 121.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 8 [2018-06-22 15:30:07,764 WARN ]: Spent 136.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2018-06-22 15:30:07,929 WARN ]: Spent 156.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2018-06-22 15:30:08,040 WARN ]: Spent 102.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2018-06-22 15:30:08,509 WARN ]: Spent 182.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 35 [2018-06-22 15:30:09,270 INFO ]: Checked inductivity of 210 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2018-06-22 15:30:09,270 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:30:09,270 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:30:09,276 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 15:30:09,391 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 15:30:09,391 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:30:09,399 INFO ]: Computing forward predicates... [2018-06-22 15:30:10,236 WARN ]: Spent 693.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2018-06-22 15:30:10,817 WARN ]: Spent 509.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2018-06-22 15:30:11,043 WARN ]: Spent 164.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2018-06-22 15:30:11,288 WARN ]: Spent 188.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2018-06-22 15:30:11,468 WARN ]: Spent 122.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2018-06-22 15:30:11,642 WARN ]: Spent 115.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2018-06-22 15:30:11,919 WARN ]: Spent 212.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown