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/seq2.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 15:30:49,371 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 15:30:49,373 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 15:30:49,385 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 15:30:49,388 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 15:30:49,389 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 15:30:49,390 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 15:30:49,392 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 15:30:49,393 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 15:30:49,394 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 15:30:49,395 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 15:30:49,397 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 15:30:49,398 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 15:30:49,399 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 15:30:49,399 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 15:30:49,400 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 15:30:49,404 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 15:30:49,417 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 15:30:49,418 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 15:30:49,419 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 15:30:49,420 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 15:30:49,422 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 15:30:49,422 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 15:30:49,423 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 15:30:49,423 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 15:30:49,424 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 15:30:49,425 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 15:30:49,425 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 15:30:49,431 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 15:30:49,431 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 15:30:49,432 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 15:30:49,433 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 15:30:49,433 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 15:30:49,433 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 15:30:49,434 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 15:30:49,434 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 15:30:49,458 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 15:30:49,458 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 15:30:49,460 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 15:30:49,460 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 15:30:49,461 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 15:30:49,461 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 15:30:49,462 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 15:30:49,462 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 15:30:49,462 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 15:30:49,462 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 15:30:49,462 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 15:30:49,463 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 15:30:49,463 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 15:30:49,463 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 15:30:49,463 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 15:30:49,463 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 15:30:49,464 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 15:30:49,464 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 15:30:49,465 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 15:30:49,466 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 15:30:49,466 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 15:30:49,521 INFO ]: Repository-Root is: /tmp [2018-06-22 15:30:49,534 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 15:30:49,540 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 15:30:49,541 INFO ]: Initializing SmtParser... [2018-06-22 15:30:49,541 INFO ]: SmtParser initialized [2018-06-22 15:30:49,542 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/seq2.c.smt2 [2018-06-22 15:30:49,543 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 15:30:49,634 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/seq2.c.smt2 unknown [2018-06-22 15:30:49,985 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/seq2.c.smt2 [2018-06-22 15:30:49,990 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 15:30:49,996 INFO ]: Walking toolchain with 4 elements. [2018-06-22 15:30:49,997 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 15:30:49,997 INFO ]: Initializing ChcToBoogie... [2018-06-22 15:30:49,997 INFO ]: ChcToBoogie initialized [2018-06-22 15:30:50,000 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 03:30:49" (1/1) ... [2018-06-22 15:30:50,040 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:30:50 Unit [2018-06-22 15:30:50,040 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 15:30:50,040 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 15:30:50,040 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 15:30:50,040 INFO ]: Boogie Preprocessor initialized [2018-06-22 15:30:50,059 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:30:50" (1/1) ... [2018-06-22 15:30:50,059 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:30:50" (1/1) ... [2018-06-22 15:30:50,078 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:30:50" (1/1) ... [2018-06-22 15:30:50,078 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:30:50" (1/1) ... [2018-06-22 15:30:50,083 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:30:50" (1/1) ... [2018-06-22 15:30:50,084 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:30:50" (1/1) ... [2018-06-22 15:30:50,086 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:30:50" (1/1) ... [2018-06-22 15:30:50,097 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 15:30:50,097 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 15:30:50,097 INFO ]: Initializing RCFGBuilder... [2018-06-22 15:30:50,097 INFO ]: RCFGBuilder initialized [2018-06-22 15:30:50,098 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:30:50" (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 15:30:50,111 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 15:30:50,111 INFO ]: Found specification of procedure False [2018-06-22 15:30:50,111 INFO ]: Found implementation of procedure False [2018-06-22 15:30:50,111 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 15:30:50,111 INFO ]: Found specification of procedure state [2018-06-22 15:30:50,111 INFO ]: Found implementation of procedure state [2018-06-22 15:30:50,111 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 15:30:50,111 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 15:30:50,111 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 15:30:50,380 INFO ]: Using library mode [2018-06-22 15:30:50,381 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 03:30:50 BoogieIcfgContainer [2018-06-22 15:30:50,381 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 15:30:50,382 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 15:30:50,382 INFO ]: Initializing TraceAbstraction... [2018-06-22 15:30:50,394 INFO ]: TraceAbstraction initialized [2018-06-22 15:30:50,395 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 03:30:49" (1/3) ... [2018-06-22 15:30:50,395 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5142a7d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 03:30:50, skipping insertion in model container [2018-06-22 15:30:50,396 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:30:50" (2/3) ... [2018-06-22 15:30:50,396 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5142a7d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 03:30:50, skipping insertion in model container [2018-06-22 15:30:50,396 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 03:30:50" (3/3) ... [2018-06-22 15:30:50,398 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 15:30:50,416 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 15:30:50,434 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 15:30:50,490 INFO ]: Using default assertion order modulation [2018-06-22 15:30:50,491 INFO ]: Interprodecural is true [2018-06-22 15:30:50,491 INFO ]: Hoare is false [2018-06-22 15:30:50,491 INFO ]: Compute interpolants for FPandBP [2018-06-22 15:30:50,491 INFO ]: Backedges is TWOTRACK [2018-06-22 15:30:50,491 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 15:30:50,491 INFO ]: Difference is false [2018-06-22 15:30:50,491 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 15:30:50,491 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 15:30:50,504 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 15:30:50,515 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 15:30:50,515 INFO ]: Found error trace [2018-06-22 15:30:50,516 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:30:50,516 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:30:50,521 INFO ]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times [2018-06-22 15:30:50,523 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:30:50,524 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:30:50,569 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:30:50,569 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:30:50,569 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:30:50,605 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:30:50,795 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 15:30:50,798 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 15:30:50,798 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 15:30:50,800 INFO ]: Interpolant automaton has 4 states [2018-06-22 15:30:50,813 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 15:30:50,813 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 15:30:50,815 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 15:30:50,908 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:30:50,909 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 15:30:50,910 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 15:30:50,911 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 15:30:50,911 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:30:50,927 INFO ]: With dead ends: 13 [2018-06-22 15:30:50,927 INFO ]: Without dead ends: 13 [2018-06-22 15:30:50,931 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 15:30:50,944 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 15:30:50,963 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 15:30:50,964 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 15:30:50,965 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 15:30:50,966 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 15:30:50,966 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:30:50,966 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 15:30:50,966 INFO ]: Interpolant automaton has 4 states. [2018-06-22 15:30:50,966 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 15:30:50,967 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 15:30:50,967 INFO ]: Found error trace [2018-06-22 15:30:50,967 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:30:50,967 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:30:50,967 INFO ]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times [2018-06-22 15:30:50,967 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:30:50,967 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:30:50,968 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:30:50,968 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:30:50,968 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:30:51,039 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:30:51,299 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 15:30:51,299 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:30:51,299 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 15:30:51,307 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:30:51,351 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:30:51,360 INFO ]: Computing forward predicates... [2018-06-22 15:30:52,079 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 15:30:52,108 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:30:52,108 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-06-22 15:30:52,109 INFO ]: Interpolant automaton has 9 states [2018-06-22 15:30:52,109 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 15:30:52,109 INFO ]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-06-22 15:30:52,109 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 9 states. [2018-06-22 15:30:52,353 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:30:52,353 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 15:30:52,353 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 15:30:52,353 INFO ]: Start accepts. Automaton has 9 states. Word has length 13 [2018-06-22 15:30:52,353 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:30:52,354 INFO ]: With dead ends: 15 [2018-06-22 15:30:52,354 INFO ]: Without dead ends: 15 [2018-06-22 15:30:52,355 INFO ]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-06-22 15:30:52,355 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 15:30:52,357 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 15:30:52,357 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 15:30:52,358 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 15:30:52,358 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 15:30:52,358 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:30:52,358 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 15:30:52,358 INFO ]: Interpolant automaton has 9 states. [2018-06-22 15:30:52,358 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 15:30:52,359 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 15:30:52,359 INFO ]: Found error trace [2018-06-22 15:30:52,359 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:30:52,359 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:30:52,359 INFO ]: Analyzing trace with hash -1649658231, now seen corresponding path program 2 times [2018-06-22 15:30:52,359 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:30:52,359 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:30:52,360 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:30:52,360 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:30:52,360 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:30:52,452 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:30:53,095 WARN ]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-06-22 15:30:53,264 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 15:30:53,264 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:30:53,264 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 15:30:53,272 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 15:30:53,330 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 15:30:53,330 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:30:53,333 INFO ]: Computing forward predicates... [2018-06-22 15:30:53,933 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 15:30:53,956 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:30:53,956 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2018-06-22 15:30:53,957 INFO ]: Interpolant automaton has 11 states [2018-06-22 15:30:53,957 INFO ]: Constructing interpolant automaton starting with 11 interpolants. [2018-06-22 15:30:53,957 INFO ]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-06-22 15:30:53,957 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 11 states. [2018-06-22 15:30:54,185 WARN ]: Spent 204.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2018-06-22 15:30:54,448 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:30:54,448 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 15:30:54,449 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 15:30:54,449 INFO ]: Start accepts. Automaton has 11 states. Word has length 17 [2018-06-22 15:30:54,449 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:30:54,450 INFO ]: With dead ends: 17 [2018-06-22 15:30:54,450 INFO ]: Without dead ends: 17 [2018-06-22 15:30:54,450 INFO ]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2018-06-22 15:30:54,450 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 15:30:54,454 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 15:30:54,454 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 15:30:54,455 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 15:30:54,455 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 15:30:54,455 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:30:54,455 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 15:30:54,455 INFO ]: Interpolant automaton has 11 states. [2018-06-22 15:30:54,455 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 15:30:54,455 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 15:30:54,455 INFO ]: Found error trace [2018-06-22 15:30:54,456 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:30:54,456 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:30:54,456 INFO ]: Analyzing trace with hash 2119922091, now seen corresponding path program 3 times [2018-06-22 15:30:54,456 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:30:54,456 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:30:54,457 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:30:54,457 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:30:54,457 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:30:54,499 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:30:54,775 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 15:30:54,776 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:30:54,776 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) [2018-06-22 15:30:54,790 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:30:54,873 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 15:30:54,873 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:30:54,878 INFO ]: Computing forward predicates... [2018-06-22 15:30:55,160 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 15:30:55,179 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:30:55,179 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-06-22 15:30:55,179 INFO ]: Interpolant automaton has 10 states [2018-06-22 15:30:55,179 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-22 15:30:55,180 INFO ]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2018-06-22 15:30:55,180 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 10 states. [2018-06-22 15:30:55,510 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:30:55,511 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-22 15:30:55,511 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 15:30:55,511 INFO ]: Start accepts. Automaton has 10 states. Word has length 21 [2018-06-22 15:30:55,511 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:30:55,511 INFO ]: With dead ends: 19 [2018-06-22 15:30:55,511 INFO ]: Without dead ends: 19 [2018-06-22 15:30:55,512 INFO ]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2018-06-22 15:30:55,512 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 15:30:55,515 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 15:30:55,515 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 15:30:55,515 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-22 15:30:55,515 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-22 15:30:55,515 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:30:55,516 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-22 15:30:55,516 INFO ]: Interpolant automaton has 10 states. [2018-06-22 15:30:55,516 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-22 15:30:55,516 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 15:30:55,516 INFO ]: Found error trace [2018-06-22 15:30:55,516 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:30:55,516 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:30:55,517 INFO ]: Analyzing trace with hash 1762711629, now seen corresponding path program 4 times [2018-06-22 15:30:55,517 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:30:55,517 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:30:55,517 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:30:55,517 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:30:55,517 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:30:55,574 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:30:56,006 WARN ]: Spent 324.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 6 [2018-06-22 15:30:56,203 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 15:30:56,203 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:30:56,203 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 15:30:56,209 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 15:30:56,255 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 15:30:56,255 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:30:56,259 INFO ]: Computing forward predicates... [2018-06-22 15:30:56,737 WARN ]: Spent 103.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2018-06-22 15:30:56,883 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 15:30:56,902 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:30:56,902 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2018-06-22 15:30:56,903 INFO ]: Interpolant automaton has 16 states [2018-06-22 15:30:56,903 INFO ]: Constructing interpolant automaton starting with 16 interpolants. [2018-06-22 15:30:56,903 INFO ]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2018-06-22 15:30:56,903 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 16 states. [2018-06-22 15:30:57,465 WARN ]: Spent 526.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2018-06-22 15:30:57,662 WARN ]: Spent 103.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 25 [2018-06-22 15:30:57,897 WARN ]: Spent 188.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 28 [2018-06-22 15:30:58,084 WARN ]: Spent 170.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 31 [2018-06-22 15:30:58,114 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:30:58,115 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-22 15:30:58,115 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 15:30:58,115 INFO ]: Start accepts. Automaton has 16 states. Word has length 25 [2018-06-22 15:30:58,116 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:30:58,116 INFO ]: With dead ends: 21 [2018-06-22 15:30:58,116 INFO ]: Without dead ends: 21 [2018-06-22 15:30:58,116 INFO ]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2018-06-22 15:30:58,117 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-22 15:30:58,119 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-22 15:30:58,119 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-22 15:30:58,120 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-22 15:30:58,120 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 25 [2018-06-22 15:30:58,120 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:30:58,120 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-22 15:30:58,120 INFO ]: Interpolant automaton has 16 states. [2018-06-22 15:30:58,120 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-22 15:30:58,121 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 15:30:58,121 INFO ]: Found error trace [2018-06-22 15:30:58,121 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:30:58,121 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:30:58,121 INFO ]: Analyzing trace with hash 853117551, now seen corresponding path program 5 times [2018-06-22 15:30:58,121 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:30:58,121 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:30:58,122 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:30:58,122 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:30:58,122 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:30:58,193 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:30:58,667 WARN ]: Spent 354.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 6 [2018-06-22 15:30:59,729 WARN ]: Spent 1.01 s on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2018-06-22 15:30:59,939 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 15:30:59,939 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:30:59,939 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 15:30:59,945 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 15:31:00,006 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-06-22 15:31:00,006 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:31:00,010 INFO ]: Computing forward predicates... [2018-06-22 15:31:00,460 WARN ]: Spent 373.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 26 [2018-06-22 15:31:00,874 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 15:31:00,893 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:31:00,893 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2018-06-22 15:31:00,893 INFO ]: Interpolant automaton has 19 states [2018-06-22 15:31:00,893 INFO ]: Constructing interpolant automaton starting with 19 interpolants. [2018-06-22 15:31:00,894 INFO ]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2018-06-22 15:31:00,894 INFO ]: Start difference. First operand 21 states and 22 transitions. Second operand 19 states. [2018-06-22 15:31:01,274 WARN ]: Spent 345.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2018-06-22 15:31:01,434 WARN ]: Spent 108.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 24 [2018-06-22 15:31:01,628 WARN ]: Spent 175.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 29 [2018-06-22 15:31:01,852 WARN ]: Spent 199.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 30 [2018-06-22 15:31:02,146 WARN ]: Spent 270.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 35 [2018-06-22 15:31:02,610 WARN ]: Spent 436.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2018-06-22 15:31:02,671 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:31:02,671 INFO ]: Finished difference Result 23 states and 24 transitions. [2018-06-22 15:31:02,672 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 15:31:02,672 INFO ]: Start accepts. Automaton has 19 states. Word has length 29 [2018-06-22 15:31:02,672 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:31:02,673 INFO ]: With dead ends: 23 [2018-06-22 15:31:02,673 INFO ]: Without dead ends: 23 [2018-06-22 15:31:02,673 INFO ]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2018-06-22 15:31:02,673 INFO ]: Start minimizeSevpa. Operand 23 states. [2018-06-22 15:31:02,676 INFO ]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-06-22 15:31:02,676 INFO ]: Start removeUnreachable. Operand 23 states. [2018-06-22 15:31:02,678 INFO ]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-06-22 15:31:02,678 INFO ]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 29 [2018-06-22 15:31:02,678 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:31:02,678 INFO ]: Abstraction has 23 states and 24 transitions. [2018-06-22 15:31:02,678 INFO ]: Interpolant automaton has 19 states. [2018-06-22 15:31:02,678 INFO ]: Start isEmpty. Operand 23 states and 24 transitions. [2018-06-22 15:31:02,679 INFO ]: Finished isEmpty. Found accepting run of length 34 [2018-06-22 15:31:02,679 INFO ]: Found error trace [2018-06-22 15:31:02,679 INFO ]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:31:02,679 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:31:02,679 INFO ]: Analyzing trace with hash -1661294575, now seen corresponding path program 6 times [2018-06-22 15:31:02,679 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:31:02,679 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:31:02,680 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:31:02,680 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:31:02,680 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:31:02,782 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:31:03,108 WARN ]: Spent 154.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2018-06-22 15:31:03,669 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 15:31:03,669 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:31:03,669 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-06-22 15:31:03,686 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:31:03,776 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-06-22 15:31:03,776 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:31:03,782 INFO ]: Computing forward predicates... [2018-06-22 15:31:05,559 WARN ]: Spent 1.28 s on a formula simplification. DAG size of input: 74 DAG size of output: 33 [2018-06-22 15:31:05,773 WARN ]: Spent 181.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2018-06-22 15:31:06,111 WARN ]: Spent 127.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2018-06-22 15:31:06,612 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 15:31:06,642 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:31:06,642 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2018-06-22 15:31:06,643 INFO ]: Interpolant automaton has 22 states [2018-06-22 15:31:06,643 INFO ]: Constructing interpolant automaton starting with 22 interpolants. [2018-06-22 15:31:06,643 INFO ]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2018-06-22 15:31:06,643 INFO ]: Start difference. First operand 23 states and 24 transitions. Second operand 22 states. [2018-06-22 15:31:07,656 WARN ]: Spent 950.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 76 [2018-06-22 15:31:07,942 WARN ]: Spent 137.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 22 [2018-06-22 15:31:08,177 WARN ]: Spent 205.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 27 [2018-06-22 15:31:08,600 WARN ]: Spent 262.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 36 [2018-06-22 15:31:09,054 WARN ]: Spent 407.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 45 [2018-06-22 15:31:09,329 WARN ]: Spent 239.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 37 [2018-06-22 15:31:10,074 WARN ]: Spent 715.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 77 [2018-06-22 15:31:10,106 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:31:10,106 INFO ]: Finished difference Result 25 states and 26 transitions. [2018-06-22 15:31:10,106 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-22 15:31:10,106 INFO ]: Start accepts. Automaton has 22 states. Word has length 33 [2018-06-22 15:31:10,107 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:31:10,107 INFO ]: With dead ends: 25 [2018-06-22 15:31:10,107 INFO ]: Without dead ends: 25 [2018-06-22 15:31:10,108 INFO ]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=167, Invalid=703, Unknown=0, NotChecked=0, Total=870 [2018-06-22 15:31:10,108 INFO ]: Start minimizeSevpa. Operand 25 states. [2018-06-22 15:31:10,111 INFO ]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-06-22 15:31:10,111 INFO ]: Start removeUnreachable. Operand 25 states. [2018-06-22 15:31:10,112 INFO ]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-06-22 15:31:10,112 INFO ]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 33 [2018-06-22 15:31:10,112 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:31:10,112 INFO ]: Abstraction has 25 states and 26 transitions. [2018-06-22 15:31:10,112 INFO ]: Interpolant automaton has 22 states. [2018-06-22 15:31:10,112 INFO ]: Start isEmpty. Operand 25 states and 26 transitions. [2018-06-22 15:31:10,113 INFO ]: Finished isEmpty. Found accepting run of length 38 [2018-06-22 15:31:10,113 INFO ]: Found error trace [2018-06-22 15:31:10,113 INFO ]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:31:10,113 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:31:10,113 INFO ]: Analyzing trace with hash -1494134477, now seen corresponding path program 7 times [2018-06-22 15:31:10,113 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:31:10,113 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:31:10,114 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:31:10,114 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:31:10,114 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:31:10,250 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:31:10,574 WARN ]: Spent 143.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 6 [2018-06-22 15:31:10,720 WARN ]: Spent 141.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 21 [2018-06-22 15:31:10,966 WARN ]: Spent 134.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2018-06-22 15:31:11,575 INFO ]: Checked inductivity of 105 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-22 15:31:11,575 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:31:11,575 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 15:31:11,581 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:31:11,653 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:31:11,661 INFO ]: Computing forward predicates... [2018-06-22 15:31:11,921 WARN ]: Spent 147.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 25 [2018-06-22 15:31:12,391 WARN ]: Spent 377.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2018-06-22 15:31:12,584 WARN ]: Spent 127.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2018-06-22 15:31:12,767 WARN ]: Spent 142.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2018-06-22 15:31:12,927 WARN ]: Spent 106.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2018-06-22 15:31:14,444 INFO ]: Checked inductivity of 105 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-22 15:31:14,464 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:31:14,464 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2018-06-22 15:31:14,464 INFO ]: Interpolant automaton has 29 states [2018-06-22 15:31:14,464 INFO ]: Constructing interpolant automaton starting with 29 interpolants. [2018-06-22 15:31:14,465 INFO ]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2018-06-22 15:31:14,465 INFO ]: Start difference. First operand 25 states and 26 transitions. Second operand 29 states. [2018-06-22 15:31:15,391 WARN ]: Spent 872.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 102 [2018-06-22 15:31:15,811 WARN ]: Spent 357.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 29 [2018-06-22 15:31:16,299 WARN ]: Spent 456.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 38 [2018-06-22 15:31:16,943 WARN ]: Spent 613.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 56 [2018-06-22 15:31:17,514 WARN ]: Spent 530.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 48 [2018-06-22 15:31:18,114 WARN ]: Spent 562.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 55 [2018-06-22 15:31:18,720 WARN ]: Spent 570.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 72 [2018-06-22 15:31:19,266 WARN ]: Spent 513.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 60 [2018-06-22 15:31:19,303 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:31:19,303 INFO ]: Finished difference Result 27 states and 28 transitions. [2018-06-22 15:31:19,305 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-06-22 15:31:19,305 INFO ]: Start accepts. Automaton has 29 states. Word has length 37 [2018-06-22 15:31:19,306 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:31:19,306 INFO ]: With dead ends: 27 [2018-06-22 15:31:19,306 INFO ]: Without dead ends: 27 [2018-06-22 15:31:19,307 INFO ]: 0 DeclaredPredicates, 62 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=234, Invalid=1098, Unknown=0, NotChecked=0, Total=1332 [2018-06-22 15:31:19,307 INFO ]: Start minimizeSevpa. Operand 27 states. [2018-06-22 15:31:19,311 INFO ]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-06-22 15:31:19,311 INFO ]: Start removeUnreachable. Operand 27 states. [2018-06-22 15:31:19,311 INFO ]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-06-22 15:31:19,311 INFO ]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 37 [2018-06-22 15:31:19,315 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:31:19,315 INFO ]: Abstraction has 27 states and 28 transitions. [2018-06-22 15:31:19,315 INFO ]: Interpolant automaton has 29 states. [2018-06-22 15:31:19,315 INFO ]: Start isEmpty. Operand 27 states and 28 transitions. [2018-06-22 15:31:19,316 INFO ]: Finished isEmpty. Found accepting run of length 42 [2018-06-22 15:31:19,316 INFO ]: Found error trace [2018-06-22 15:31:19,316 INFO ]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:31:19,316 INFO ]: === Iteration 9 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:31:19,316 INFO ]: Analyzing trace with hash 1618126293, now seen corresponding path program 8 times [2018-06-22 15:31:19,316 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:31:19,316 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:31:19,317 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:31:19,317 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:31:19,317 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:31:19,449 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:31:20,768 INFO ]: Checked inductivity of 136 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-06-22 15:31:20,768 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:31:20,768 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 15:31:20,774 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 15:31:20,892 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 15:31:20,892 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:31:20,905 INFO ]: Computing forward predicates... [2018-06-22 15:31:21,563 WARN ]: Spent 453.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 34 [2018-06-22 15:31:21,879 WARN ]: Spent 245.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 39 [2018-06-22 15:31:22,166 WARN ]: Spent 232.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2018-06-22 15:31:22,341 WARN ]: Spent 127.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2018-06-22 15:31:22,518 WARN ]: Spent 130.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2018-06-22 15:31:24,106 INFO ]: Checked inductivity of 136 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-06-22 15:31:24,126 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:31:24,126 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 30 [2018-06-22 15:31:24,126 INFO ]: Interpolant automaton has 30 states [2018-06-22 15:31:24,126 INFO ]: Constructing interpolant automaton starting with 30 interpolants. [2018-06-22 15:31:24,127 INFO ]: CoverageRelationStatistics Valid=75, Invalid=795, Unknown=0, NotChecked=0, Total=870 [2018-06-22 15:31:24,127 INFO ]: Start difference. First operand 27 states and 28 transitions. Second operand 30 states. [2018-06-22 15:31:25,324 WARN ]: Spent 1.11 s on a formula simplification. DAG size of input: 136 DAG size of output: 99 [2018-06-22 15:31:25,721 WARN ]: Spent 326.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 35 [2018-06-22 15:31:26,101 WARN ]: Spent 337.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 40 [2018-06-22 15:31:26,752 WARN ]: Spent 527.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 59 [2018-06-22 15:31:27,515 WARN ]: Spent 708.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 59 [2018-06-22 15:31:28,064 WARN ]: Spent 499.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 59 [2018-06-22 15:31:28,706 WARN ]: Spent 594.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 60 [2018-06-22 15:31:29,270 WARN ]: Spent 519.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 59 [2018-06-22 15:31:29,949 WARN ]: Spent 616.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 59 [2018-06-22 15:31:29,996 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:31:29,996 INFO ]: Finished difference Result 29 states and 30 transitions. [2018-06-22 15:31:29,999 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-06-22 15:31:29,999 INFO ]: Start accepts. Automaton has 30 states. Word has length 41 [2018-06-22 15:31:29,999 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:31:30,002 INFO ]: With dead ends: 29 [2018-06-22 15:31:30,002 INFO ]: Without dead ends: 29 [2018-06-22 15:31:30,002 INFO ]: 0 DeclaredPredicates, 70 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=267, Invalid=1293, Unknown=0, NotChecked=0, Total=1560 [2018-06-22 15:31:30,002 INFO ]: Start minimizeSevpa. Operand 29 states. [2018-06-22 15:31:30,005 INFO ]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-06-22 15:31:30,005 INFO ]: Start removeUnreachable. Operand 29 states. [2018-06-22 15:31:30,006 INFO ]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-06-22 15:31:30,006 INFO ]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 41 [2018-06-22 15:31:30,006 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:31:30,006 INFO ]: Abstraction has 29 states and 30 transitions. [2018-06-22 15:31:30,006 INFO ]: Interpolant automaton has 30 states. [2018-06-22 15:31:30,006 INFO ]: Start isEmpty. Operand 29 states and 30 transitions. [2018-06-22 15:31:30,007 INFO ]: Finished isEmpty. Found accepting run of length 46 [2018-06-22 15:31:30,007 INFO ]: Found error trace [2018-06-22 15:31:30,007 INFO ]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:31:30,007 INFO ]: === Iteration 10 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:31:30,008 INFO ]: Analyzing trace with hash 996918775, now seen corresponding path program 9 times [2018-06-22 15:31:30,008 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:31:30,008 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:31:30,008 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:31:30,008 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:31:30,008 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:31:30,183 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:31:31,129 WARN ]: Spent 104.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2018-06-22 15:31:31,719 INFO ]: Checked inductivity of 171 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-06-22 15:31:31,720 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:31:31,720 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 15:31:31,725 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 15:31:31,842 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-06-22 15:31:31,842 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:31:31,851 INFO ]: Computing forward predicates... [2018-06-22 15:31:32,759 WARN ]: Spent 686.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 63 [2018-06-22 15:31:35,436 WARN ]: Spent 1.91 s on a formula simplification. DAG size of input: 170 DAG size of output: 77 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown